Giao an Dien Dan Dung 105 Tiet

8/4/2019 Giao an Dien Dan Dung 105 Tiet

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Gio n: in dn dng 105 tit

Chng m u

Bi 1: Gii thiu gio dc ngh in dn dng

I/ Mc tiubi hc :- Bit c v tr vai tr ca in nng v ngh in dn dngtrong sn xut v i sng- Bit c trin vng ca ngh in dn dng- Bit c mc tiu ni dung chng trnh v phng php hctp ngh in dn dngII/ Chun b bi ging :1/ chun b ni dung:- Nghin cu bi 1SGK

- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Cc thng tin c lin quan n ngh inIII/Tin trnh ging dy:1/ n nh lp: 2 pht Kim tra s s lp hc , n nh lp2/ Kim tra bi c:3/ Ni dung ging bi mi: 80 pht

Hot ng ca thyv tr TG Ni dung bi ging

Hot ng 1: Tmhiu v tri vai trca in nng vngh in trong SXv S

GV: Cc em hy nu v

tr vai tr ca innng v ngh indn dng trong snxut v i sng?HS tr li

GV: Em hy nu v d

chng t in nng ddng bin i thnhcc dng nng lng

30 I. V tr vai tr ca innng v ngh in dndng trong sn xut v isng1/ V tr vai tr ca in nngtrong sn xut v i sng- in nng l ngun ng lc

ch yu i vi sn xut v isng v nhng l do c bnsau:- in nng c sn xut tptrung trong cc nh my inv c th truyn tI I xa vihiu sut cao.- Qu trnh sn xut v truynti, phn phi v s dng in

nng c t ng ho v iukhin t xa d dng.- in nng d dng bin i

...Nguyn c Hng1


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Gio n: in dn dng 105 titHot ng ca thy

v trTG

Ni dung bi ging

khc?HS tr li

sang cc dng nng lng khc

GV: Cc em hy nu vtr vai tr ca nghin dn dng ly vd minh ha?HS tr li

2. V tr vai tr ca ngh in

dn dng- Sn xut truyn ti v phnphi in nng- Ch to cc vt t thit b in- o lng iu khin t ngha qu trnh sn sut- Sa cha nhng h hng cacc thit b in mng insa cha ng o h in

- Ngh in rt a dng, hotng ch yu trong lnh vc sdng in nng phc v isng sinh hot v sn xut- Ngh in dn dng gi mtvai tr quan trng gp phnthc y s cng nghip hahin i ha t nc.

Hot ng 2 : Tm

hiu trin vng cangh inGV:Em hy cho bittrin vng ca nghin dn dng trongcng cuc cng nghipho, hin i ho tnc hin nay?HS tr li

10' II. Trin vng ca ngh in

dn dng- Ngh in dn dng lun cnpht trin phc v snghip cng nghip ha t nc- S pht trin ca ngh ingn linvi s pht trin ca ngnh

in- Ngh in dn dng phttrin gn lin vi tc phttrin xy dng nh - Ngh in dn dng c nhiniu kin pht trin khngnhng thnh th m cn cnng thn v min ni

Hot ng 3 :Tmhiu mc tiu,nidung chng trnhGV: cc em hy numc tiu ni dung ch-ng trnh gio dc

20' III. Mc tiu, ni dung ch ngtrnh gio dc ngh indn dng1. Mc tiua. V kin thc- Bit nhng kin thc an ton

...Nguyn c Hng2


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v trTG

Ni dung bi ging

ngh in dn dng

GV: Khi hc ngh

in cn c kin thcg v ngh?HS tr li

GVnu nhng yu cuv kin thc m hcsinh cn c hc ttmn hc ngh indn dng

HS ch nghe ging

lao ng ca ngh- Bit c nhng kin thc cbn, cn thit v o lng in

trong ngh in dn dng.- Hiu c nhng kin thc cbn v cng dng, cu to,nguyn l lm vic, bo dng vsa cha n gin mt s dng in trong gia nhHiu nhng kin thc c bnv tnh ton, thit k mngin trong nh n gin

- Bit tnh ton thit k mybin p mt pha cng sut nh- Bit nhng kin thc cn thitv c im, yu cu, trinvng pht trin ca ngh indn dng

Khi hc ngh incn c k nng g vngh?HS tr li

GV nu mt s k nngm hc sinh s c ctrong chng trnh hcngh in dn dngHS ch nghe ging

b. V k nng- S dng c dng c lao ngmt cch hp l v ng kthut- Thit k v ch to c mybin p mt pha cng sut nh- Thit k, lp t c mngin trong nh n gin- Tun th nhng quy nh anton lao ng ca ngh trongqu trnh hc tp- Tm hiu c nhng thng tincn thit v ngh in dndng

GV nu nhng thi cn thit ca hc sinhtrong qu trnh hcnghHS ch theo di

c. V thi - Hc tp nghm tc- Lm vic kin tr, khia hc, ctc phong cng nghip, mbo an ton lao ng v gi vsinh mi trng- Yu thch, hng th vi cngvic v c thc ch ng la

chn ngh nghip tng lai.Hot ng 4: Tm 20' IV. Ph ng php hc tp ngh

...Nguyn c Hng3


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v trTG

Ni dung bi ging

hiu phng phphc ngh inGV: cc em hy cho

bit ti sao phi hiur mc tiu bi hc trckhi hc bi mi ?

Khi hc theo cp theonhm hc sinh cn ch n vn g?

GV: Ti sao vi mn nyli ch trng phngphp hc thc hnh?HS tr liGV nu cc phng phphc tp thc hnh c kt qu tt khi hcngh in dn dngHS ch nghe ging

in dn dng1. Hiu r mc tiu bi hc tr ckhi hc b mi

2. Tch cc tham gia xy dngcch hc theo cp, nhm- Tun th theo s iu khinhot ng ca gio vin vnhm trng- Trao i vi gio vin v ccbn trong nhm nhng vn

cha r- Tham gia tch cc giiquyt nhim v ca nhm- Trnh by kt qu ca nhmtrc lp nu c giao- T nh gi v nh gi chokt qu t c theo hng dnca gio vin

3. Ch trng ph ng php hcthc hnh

IV/ Tng kt bi hc: 8'H thng li kin thc:- V tr vai tr ca in nng v ngh in dn dng trongsn xut v i sng- V tr vai tr ca ngh in dn dng- Trin vng ca ngh in dn dng- Mc tiu, ni dung chng trnh gio dc nh in dn dng- Phng php hc tp ngh in dng dngV/ Cu hi bi tp v h ng dn t hcCu hi: Nu v tr, vai tr ca in nng v ngh in dndng trong sn xut v i sng?VI/ T nh gi v rt kinh nghim

Thng qua t b mn Thanh H, ngy..thng.nm 2009

Ngi son

...Nguyn c Hng4


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Bi 2: An ton lao ng trong gio dcngh in dn dng

I/ Mc tiubi hc :1. kin thc:- Bit c tm quan trng, s cn thit ca vic thc hin anton lao ng trong ngh in dn dng- Nu c nhng nguyn nhn thng gy tai nn in v binphp bo v an ton lao ng trong ngh in dn dng

2. K nng:- Thc hin ng nhng bin php m bo an ton lao ngtrong ngh in dn dng3. Thi :- Thc hin ng hng dn ca gio vin trong khi hc tp vthc hnhII/ Chun b bi ging :1/ chun b ni dung:- Nghin cu bi 2 SGK- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Mt s dng c bo h lao ng : ng cao su, km, tuavt,thm cao su, gh g kh,- My chiu, my tnh xch tay,III/ Ni dung bi ging1/ n nh lp : 2 pht Kim tra s s lp hc2/ Kim tra bi c: 5 phtCu hi: Trnh by v tr, vai tr v kh nng pht trin ca

ngh in dn dng ?3/ Ni dung bi ging : 125 pht

...Nguyn c Hng5


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Gio n: in dn dng 105 titHot ng ca thy v

trTg

Ni dung bi ging

Hot ng 1: Tmhiu nguyn nhngy tai nn lao ng

trong ngh inGV: Cc em hy k ccnguyn nhn gy mtan ton lao ng in?HS tr li

GV nu cc nguyn nhngy ra tai nn in th-ng gpHS ch theo di

GV: Em hy nu ccnguyn nhn khc dnti tai nn in?HS tr li

45

I. Nguyn nhn gy tai nnlao ng trong ngh indn dng

1/ Tai nn inTai nn in c cc nguyn nhnsau:- Khng ct in trc khi sa

cha- Do ch lm vic cht hp ngi

lm v chm vo vt mangin

- Do s dng cc dng inc v bng kim loi nhng hngcch in

- Vi phm khong cch an ton liin cao p

- Khng n gn ng dy bt xung t

2/ Cc nguyn nhn khc- Do lm vic trn cao khngmang dy bo him- Do lm vic trn cao lm di ccvt dng xung

Hot ng 2: Tmhiu 1 s bin phpan ton lao ngGV: khi lm vic viin p cao cn phithc hin cc bin phpan ton noHS tr li

GV: Cn phi thc hincc bin php an tonno khi hc tp v laong trong phng thchnh hoc phn xngsn xut

HS tr li

80

II. Mt s bin php an tontrong lao ng ngh indn dng1/ Cc bin php ch ng phngtrnh tai nn in- m bo cch in tt cc

thit b in- S dng in p thp, my

bin p cch li- S dng nhng bin bo tn

hiu nguy him- S dng cc phng tin phng

h an ton2. Thc hin an ton lao ngtrong phng thc hnh hocphn x ng sn xuta. phng thc hnh hoc phn

xng sn xut phi t tiu chunan ton lao ng- Ni lm vic c nh sng

...Nguyn c Hng6


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Gio n: in dn dng 105 titHot ng ca thy v

trTg

Ni dung bi ging

GV: Cn thc hin cc

bin php an ton laong no khi tin hnhcng vic lp t vsa cha mng insinh hot?HS tr li

GV nu cc bin php anton khi lp t v sacha mng in sinhhotHS ch nghe ging

GV? Ni t bo vnhm mc ch g?HS tr li

- Ch lm vic m bo sch sthng thong- C chun b sn sng cho cc

trng hp cp cub. Mc qun o v s dng ccdng c bo h lao ng khi lmvicc. Thc hin cc nguyn tc anton lao ng- Lun cn thn khi lm vic vimng in- Hiu r cc quy trnh trc khilm vic- Ct cu dao in trc khi tinhnh cng vic sa cha- Trc khi lm vic tho b ngh, n trang- S dng cc dng c lao ng

ng tiu chun- Trong trng hp phi thao tc

khi c in cn phi thntrng v s dng cc vt ltcch in

3. Ni t bo v

IV. Tng kt bi: 3.- Nguyn nhn gy tai nn lao ng trong ngh in dn

dng v cc bin php an ton

V/ Bi tp v h ng dn t hc :Cu hi: Nu nguyn nhn ca cc tai nn in?VI. T nh gi v rt kinh nghim

...........................................

............

...Nguyn c Hng7


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Chng 1: o lng inKhi nim chung v o lng in

I/ Mc tiubi hc :

1. kin thc:- Bit c vai tr quan trng ca o lng in trong ngh

in dn dng2. K nng:- Bit phn loi, cng dng, cu to chung ca cc c cu o3. Thi :- Thc hin ng hng dn ca gio vin trong khi hcII/ Chun b bi ging :1/ chun b ni dung:

- Nghin cu bi 3 SGK- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Cc thng tin c lin quan n ngh in- Mt s thit b o lng in: ng h vn nng, ampek,

vk, cng t in,..- My chiu, my tnh xch tay, ti liu lin quan n bi

ging,.III/Tin trnh ging dy:

1/ n nh lp: 2 pht Kim tra s s lp hc , n nh lp2/ Kim tra bi c:Cu hi: Nu nguyn nhn ca cc tai nn in?3/ Ni dung ging bi mi: 40 pht

...Nguyn c Hng8


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IV/ Tng kt bi hc :3

...Nguyn c Hng

Hot ng ca thyv tr

TGNi dung bi ging

Hot ng1: Tmhiu vai tr ca olng inGV: o lng in cv tr nh th notrong ngnh in ?HS tr liGV Em hy ly v dchng minh c th sdng mt s dng co lng phthin mt s h hngxy ra trong thit bin trong mchin?Hc sinh tr li

Hot ng 2: Tmhiu cch phn loidng c o lngin

GV: n v o inp l g?Hc sinh tr li

n v o dngin l g ?

n v o cng sut

l g ?

n v o in nngl g?

Ngoi ra trn v ccthit b cn ghi cc

k hiu g ?Hc sinh tr li

10

10

I.Vai tr quan trng ca o l-ng in i vi ngh indn dng1 Nh c dng c o lng c thxc nh c cc tr s cc i l-

ng in trong mch in2. Nh c dng c o lng inta c th pht hin mt s h hngxy ra trong thit b in trongmch in

3. i vi cc thit b mi ch tomi hoc i tu li cn o xcnh cc thng s c bn nh gi cht lng ca chng nhc dng c o ta c th xc nhchnh xc c cc thng s II. Phn loi dng c o lngin1. Theo i lng cn o- Dng c o in p

- Dng c o dng in

- Dng c o cng sut

- Dng c o in nn

2. Theo nguyn l lm vic

- Dng c o kiu t in

- Dng c o kiu in t

- C cu o kiu in ng

- C cu o kiu cm ng

Hot ng 3: Tmhiu cp chnh xcGV: Ti sao trong ccu o cn c cp

5 III. Cp chnh xc(thang o x cp chnh xc)/ 100VD:Vn k thang o 300V cp chnh

9

V

A

W

KW


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Gio n: in dn dng 105 tit- Vai tr ca o lng in i vi ngh in dn dng- Phn loi dng c o lng in- Cu to chung ca dng c o lngV/ Cu hi bi tp v h ng dn t hcCu hi: 1. Nu cch phn loi dng c o lng in

2. Nu cu to chung ca cc dng c o lngVI/ T nh gi v rt kinh nghim

Chng 1: o lng inBi 4 : Thc hnh: o dng in v o in p xoay

chiu

I/ Mc tiubi hc :1. kin thc:- Hiu cch o dng in bng ampek xoay chiu- Hiu cch o in p bng vn k xoay chiu2. K nng:- Bit cch o dng in bng ampek xoay chiu

- Bit cch o in p bng vn k xoay chiu3. Thi :- Thc hin ng hng dn ca gio vin trong khi hc

II/ Chun b bi ging :1/ chun b ni dung:- Nghin cu bi 3 SGK- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Cc thng tin c lin quan n ngh in- Mt s thit b o lng in: ng h vn nng, ampek,

vk, cng t in,..- My chiu, my tnh xch tay, ti liu lin quan n bi

ging,.III/Tin trnh ging dy:STT

Ngy lnlp

Ti lp Vngmt c

l do

Vng mt khngl do

Ghi ch

123

1/ n nh lp: 2 pht Kim tra s s lp hc , n nh lp

2/ Kim tra bi c: 3Cu hi: Nu nguyn nhn ca cc tai nn in?3/ Ni dung ging bi mi: 125 pht

...Nguyn c Hng10


11/109


Hot ng ca thyv tr

TgNi dung bi ging

Hot ng 1: Tmhiu c cu o

kiu in t

Quan st vo H4.3a,

H4.3b SGK v cho

bit cu to ca c

cu o ?

Hc sinh tr li

GV nu nguyn l lm

vic ca c cu kiu

in tHc sinh ch theo

di

GV? C cu o kiu

in t lm vic

theo nguyn l no?

HS tr li

GV? Khi s dng c

cu o cn nm c

nhng im g?Hc sinh tr li

30 1. Gii thiu c cu o kiuin t

a. Cu toGm phn tnh ca c cu o l

cun dy bt hoc cun dy trn

nh H4.3a, H4.3b

- Phn ng l mt ming st

lch tm gn vi trc quay v

kim. i vi c cu o c cun trnphn ng l mt ming st gn

vi trc v kim. Ngoi ra ming st

cn gn vi cun dy phn tnh

b. Nguyn l lm vic

- Khi cho dng in cn o vo

cun dy phn tnh s to nn t

trng lm t ha ming st phn

ng t trng ny s ht ming

st lch tm to nn mmen quay

khi ming thp b ht lm cho l

xo b xon li to nn mmen cn.

v tr cn bng mmen cn v

gc quay t l vi dng in cn

o

c. c im s dng

Gc quay t l vi bnh phng

dng in cn o, thang o chia

khng u

- Dng c o in t khng c

...Nguyn c Hng11


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v trTg

Ni dung bi ging

cc tnh do o c c dng

mt chiu v xoay chiu

- Dng c o c chnh xckhng cao chu nh hng ca t tr-

ng ngoi

- Cu to n gin, r tin

Kh nng qu ti tt v cun dy

phn tnh nn c th ch to

tit din ln

...Nguyn c Hng12


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v trTg

Ni dung bi ging

Hot ng 2: Tmhiu cch odng in xoay

chiu K

220V

Hnh 1: o dng inxoay chiu

trnhtthnghim

ktqutnh

ktquo

ln 1ln 2ln 3

45 2. o dng in xoay chiua. s oChn ng h o c thang o 1A

gii thiu c cu o ki t ingii thiu cch mc Ampe k theos - o dng in trn tng bng n- o dng in trn ton mch chonhn xt

b/ Trnh t tin hnhBc 1.

Ni dy theo hnh 1ng cng tc K c v ghi chs ampe k v in vo bngBc 2Tho 1 bng n

ng cng tc K c v ghi chs vo bngct cng tc KBc 3

Tho 1 bng nng cng tc K c v ghi chs vo bngct cng tc K

...Nguyn c Hng13

A


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v trTg

Ni dung bi ging

Hot ng 3 : Tmhiu cch oin p xoay

chiu

o dng in xoaychiu

trnh tthnghim

ktqutnh

ktquo

ln 1ln 2

ln 3

40

3. o in p xoay chiua. S o

Chn ng h o c thang o 1Agii thiu c cu o ki t ingii thiu cch mc Ampe k theos o dng in trn tng bng no dng in trn ton mch chonhn xtb/ Trnh t tin hnhbc 1.

Ni dy theo hnh 4.1ng cng tc K c v ghi chs ampe k v in vo bngBc 2

Tho 1 bng nng cng tc K c v ghi chs vo bngct cng tc KBc 3

Tho 1 bng nng cng tc K c v ghi chs vo bngct cng tc

IV/ Tng kt bi hc: 5

- GV nhn xt gi thc hnh:

+ S chun b ca hc sinh

+ K nng lm bi ca hc sinh

+Thi ca hc sinh

- GV thu bi chm im

GV nhc nh cc em v c trc bi 5 SGK

V. Bi tp v nh v h ng dn t hc

Cu hi: Trnh by cch o in p xoay chiu?

Cu hi 2: Trnh by cch dng in xoay chiu?

VI. Rt kinh nghim gi dy...Nguyn c Hng14

A

V

K


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..

.

Thng qua t b mn Thanh H, ngy ..thng.nm2009

Ngy son

Chng 1: o lng in

Bi 5: Thc hnh o cng sut v in nng

I/ Mc tiubi hc :1. kin thc:- Hiu cch o cng sut gin tip qua dng in v in p2. K nng:- o c cng sut trc tip bng Wot k- Kim tra v hiu chnh c cng t in3. Thi :

- Thc hin ng hng dn ca gio vin trong khi hc thc hnhII/ Chun b bi ging :1/ chun b ni dung:

...Nguyn c Hng

Gio n S 5; S tit: 03(T tit: 10 n tit12)

15


16/109

Gio n: in dn dng 105 tit- Nghin cu bi 3 SGK- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Cc thng tin c lin quan n ngh in- Mt s thit b o lng in: ng h vn nng, ampek,

vk, cng t in,..- Vn k in t 300V, ampek in t 1A, ot k, cng tmt pha

- 3 bng n 220V - 60W, 1 cng tc 5A- Ph ti o in nng tiu th ca mch inng h bm giy- Km, tuavt, bt th in, dy dnIII/Tin trnh ging dy:ST

T

Ngy ln

lp

Ti lp Vng

mt cl do

Vng mt

khng l do

Ghi ch

123

1/ n nh lp: 2 pht Kim tra s s lp hc , n nh lp2/ Kim tra bi c: 3Cu hi: Nu cch o dng in v in p bng cch s dng

vn k v ampe k?3/ Ni dung ging bi mi: 125 pht

...Nguyn c Hng16


17/109


...Nguyn c Hng

Hot ng ca thyv tr

TgNi dung bi ging

Hot ng 1: Chunb thc hnhGV chun b dng cv thit b thc hnh.Hc sinh bo qun ccdng c v thit bGV phtHot ng 2: Tmhiu Ot k v ccho cng sutGV gii thiu hnh 5.5SGKHS ch theo di

GV? Em hy nu cuto ot k kiu inng?Hc sinh tr li

GV? Nu c tnh sdng otk kiu inng?HS tr li

GV gii thiu cc ph-ng php o cngsut trong mch mtchiu v mch xoaychiu.HS ch theo di

Trnh tTN

U I P=UI

Ln1Ln2

5

60

I. Chun bVn k 300V- Am pe k 1A, ot k, cng t

in- 3 bng n 220V- 60W- ng h bm giy- km, tua vt dy dn inII. Quy trnh thc hnh1. Gii thiu ot k kiu innga. Cu to- Phn tnh ca c cu l cundy c tit din ln mc ni tipvi mch cn o gi l cun dng- Cun c tit din nh hn mcsng song vi mch cn o cn gil cun p- Ngoi ra cn c b phn cn dukim ch hin thb. Nguyn l lm vicc/ c tnh s dngOt k in ng c cc tnhngha l chiu quay ca phnng ph thuc vo cc tnh cacun dng

2. o cng suta/ Ph ng php o gin tip: ocng sut bng am pe k v vnk o cng sut trong mch mtchiu v mch xoay chiu thunin tr c th s dng vn ktheo s

Quy trnh thc hnhBc 1 ng cng tc K c gi trampe k v vn k ri tnh cngsut P=UIBc 2 Ct cng tc K tho bt 1bng n ri ng cng tc Kc gi tr ampe k v vn ktnh P=UI ghi kt qu vo bng

17

220v

WK

220

v

KWh

A

V

k

V

AK


18/109


IV/ Tng kt bi hc: 5- GV nhn xt gi thc hnh:+ S chun b ca hc sinh+ K nng lm bi ca hc sinh+Thi ca hc sinh

- GV thu bi chm imGV nhc nh cc em v c trc bi 5 SGKV. Bi tp v nh v h ng dn t hcCu hi: Trnh by cch o cng sut v o in nng?VI. Rt kinh nghim gi dy

Bi 6 : thc hnh S dng vn nng kI/ Mc tiu bi hc:1. kin thc:

- o c in tr bng vn nng k- Pht hin c h hng trong mch in bng vn nng k2. K nng:- S dng thnh tho vn nng k3. Thi :- Thc hin ng hng dn ca gio vin trong khi thc hnhm bo an ton v sinhII/ Chun b bi ging :1/ chun b ni dung:

- Nghin cu bi 6SGK- c ti liu tham kho lin quan n bi ging2/ Chun b dng dy hc- Ngun in xoay chiu 220V- 3 bng n 220V-60W 1 cng tc 5A- 7 vn nng k- Mt s in tr ni thnh bng mchIII/Tin trnh ging dy:1/ n nh lp: 2 pht

Kim tra s s lp hc , n nh lp2/ Kim tra bi c: 3Cu hi: Nu cch o cng sut v o in nng tiu th?3/ Ni dung ging bi : 125pht

...Nguyn c Hng18


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Gio n: in dn dng 105 titIV/ Tng kt bi hc

...Nguyn c Hng

Hot ng ca thy v

tr

TgNi dung bi ging

Hot ng 1: Tm hiu

vn nng k

GV gii thiu vn nng k

Hc sinh ch quan st

GV? Nu cu to vn nng

k?

HS tr li

GVhng dn hc sinh cch

s dng vn nng k

HS ch quan st

30 1. Gii thiu vn nng k

Vn nng k l dng c o

nhiu chc nng, ch yu

o in tr, dng in, in

p- V nguyn l y l c cu

o kiu t in. Phn tnh l

nam chm vnh cu phn

ng l khung dy mnh. Nh

kha chuyn mnh c th o

dng in, in p mt chiuhoc xoay chiu, o in tr

c nhiu thang o khc nhau

Vn nng k l dng c o

tng hp c nhiu chc nng,

nm chnh trc khi s dng cn

nm vng ngha, cch s

dng ca tng nm la

chn i lng o thch hpHot ng 2 : Chun b

GV : Chia nhm v pht

ng h v thit b cho

cc nhm

Hot ng 3 : S dngvn nng o in

tr :

GV hng dn hc sinh cch

pht hin t dy trong

on mch

HS ch quan st

-

5

45

I. Chun b thc hnh

- 1 vn nng k

- Mt in tr ni thnh mch

bng

- Ngun in xoay chiu 220VII Quy trnh thc hnh

1. S dng vn nng k

o in tr

Bc 1 Tm hiu cch s dng

vn nng k v bng o in

tr v 2 que oBc 2 Hiu chnh 0 ca vn

nng k

Chn thang Rx1 chp 2 que o

19

R

1

R

3

R

1

R

3


20/109

Gio n: in dn dng 105 tit- GV nhn xt gi thc hnh:+ S chun b ca hc sinh+ K nng lm bi ca hc sinh+Thi ca hc sinhGV nhc nh cc em v c trc bi 5 SGK

V. Bi tp v nh v h ng dn t hcCu hi: Trnh by cch s dng vn nng k?VI. Rt kinh nghim gi dy

Chng II: My bin pBi 7 : Mt s vn chung v my bin p

I/ Mc tiu bi hc:

1. kin thc:- Bit c khi nim chung v my bin p.- Hiu c cng dng,cu to v nguyn l lm vic ca MBA.

2. K nng: - Lm c mt s loi bi tp v MBA.

- c c cc s liu nh mc ca MBA v bit phn loiMBA3. Thi :

- HS lin h thc t thy c vai tr ca MBA i vi

truyn ti v phn phi in nng.- Hc tp nghim tc, bit yu qu ngh in dn dngII/ Chun b bi ging :

- Nghin cu bi 7-SGK .- c ti liu tham kho lin quan n bi ging.- Vt mu: L thp k thut in li thp), my bin p t

ngu, my bin p cm ng,III/ Qu trnh thc hin bi ging:1/ n nh lp: Kim tra s s lp hc: 2pht2/ Kim tra bi c:3

Cu hi: Trnh by cch s dng vn nng k o intr?3/ t vn vo bi mi: Trong cuc sng sinh hot cng nh sn xut,chng ta rt hay

gp MBA.Vy MBA c cng dng g? C nhng loi MBA no?

Cu to v nguyn l lm vic ca MBA ra sao? Chng ta hy

nghin cu bi 7.4/ Ni dung bi ging : 80

...Nguyn c Hng20


21/109


...Nguyn c Hng21


22/109

1 2 3 4 5

Gio n: in dn dng 105 titIV.Tng kt bi hc

...Nguyn c Hng

Hot ng ca thy

v trTg Ni dung bi ging

Hot ng 1: Tmhiu cng dngMBA*GV t cu hi:+ bin i inp ca dng in

xoay chiu t in pcao xung in pthp hoc ngc li,tadng loi my inno?Hc sinh tr liGV ?Em hay gp MBA u?Hc sinh tr li

GV? Em hy giithch v sao cn cMBA tng p u -ng dy v MBA h p cui ng dy?HS: tr li

GV: Gii thch

5 I/ Khi nim chung v my binp:1.Cng dng:- My bin p c vai tr quan trngkhng th thiu trong truyn ti vphn phi in nng.*S h thng truyn ti vphn phi in nng:

Ch dn:

1. My pht in.2. MBA tng p.3. ng dy truyn ti.4. MBA h.5. Cc h tiu th.

My bin p cn c dng trong

cng nghip (nh hn in...),trongi sng gia nh,trong k thut

in t ghp ni tn hiu gia cc

tng khuch i trong cc b

lc,lm ngun cho cc thit b

in,in t nh bin p loa,bin

p trung tn...)Hot ng 2 : nhngha MBA

GV? nu nh nghaMBA?Hc sinh tr li

*GV hi:+ Theo em cun dyno l cun dy scp,cun dy no lcun dy th cp?

2.nh ngha my bin p:- My bin p l thit b in ttnh, lm vic theo nguyn l cmng in t, dng bin iin p xoay chiu ny thnhin p xoay chiu khc nhng vngi nguyn tn s.- Trong bn v s in, MBA -

c k hiu nh sau:

- Cun dy ni vi ngun gi l cundy s cp k hiu cc i lng U1,

22N

2

I

2

I

1 U

1

U

2

N

1

Ti

Mcht

U1 hoU2


23/109

Gio n: in dn dng 105 tit- Khi nim chumg v my bin p- Phn loi my bin p- Khi nim my bin pV. Bi tp v h ng dn t hcCu 1: Khi ni cun s cp my bin p vi ngun in mt

chiu s xy ra hin tng g? Ti sao?Cu 2: Nu khi nim v cng dng ca my bin p mt phacng sut nh?VI. T nh gi v rt kinh nghim

Bi 8- tnh ton, thit k my bin p mt pha

I/ Mc tiu bi hc:1. kin thc:- HS nm c quy trnh chung tnh ton thit k MBAmt

pha cng sut nh.- Hiu c yu cu,cch tnh ca tng bc khi thit k MBA mt

pha cng sut nh.2. K nng: - Thc hin c quy trnh chung tnh ton thit k MBAmt pha cng sut nh.

- Thc hin c cc bc tnh ton: Xc nh cng sut,tnh tonmch t, tnh s vng dy ca cc cun dy,tnh tit dindy qun, tnh din tch ca s li thp,sp xp dy quntrong ca s.3. Thi :- HS c thc tm hiu cch tnh ton thit k MBA v lin h

trong thc t.II/ Chun b bi ging :

- Nghin cu bi 8-SGK .

- c ti liu tham kho lin quan n bi ging.- Dy qun my bin p, li thp my bin p, km, tuavt,III/ Tin trnh bi dy:1/n nh lp:2 Kim tra s s lp hc.2/Kim tra bi c:3

Cu hi: Trnh by cu to v nguyn l lm vic ca mybin p?3/t vn vo bi mi: Mun thit k my bin p mt pha cng sut nh ta phithc hin nhng quy trnh nh th no?Chng ta hy nghin cuni dung bi 8.

...Nguyn c Hng23


24/109

Gio n: in dn dng 105 tit4/Ni dung bi ging mi: 80

...Nguyn c Hng24


25/109


...Nguyn c Hng

Hot ng ca thyv tr

TG Ni dung bi ging

Hot ng 1: Tmhiu qui trnhchung

*GV din gii:Vic tnh ton

chnh xcMBA ch c ti rt phctp v phi giiquyt gii hn tnhnhit ti a vst p trong gii hncho php. giiquyt cc vn ny,khi tnh toncn phi tin hnh

mt s php tnhkh phc tp.Trongbi ny,chng ta sdng phng phpda vo nhng ktqu thcnghim,n ginnhng vn m botnh chnh xc.

*GV a ra cc bctnh toand thit kMBA.

*GV hng dn HScch chn cng sutMBA trong gianh.Gii thch ccthng s trong cng

thc.

*GV a ra vd,tnh ton c th HS d hiu.GV gi hc sinh lngii bi tp

30 I/Quy trnh chung tnh tonthit k MBA mt pha cng sutnh.* Tnh ton thit k MBA gmnhng bc sau :

1. Xc nh cng sut My bin p.2. Tnh ton mch t.3. Tnh s vng dy ca cc cun

dy.4. Tnh tit din dy qun.5. Tnh din tch ca s li thp.

* Chn cng sut MBA iuchnh:

Cng sut Tnh ton ca MBA c

tnh theo cng thc sau:Stt = K.

i

iP

cos(1+kdt) (VA)

Trong :- K l h s ng ng thi v lybng 0,61 tu theo s ti nhiu hay

t v tnh hot ng ng thi cachng.- Pi l cng sut ca tng thit b

mc vo mch.- cos l h s cng sut ca tngthit b mc vo mch,c th:

+n si t v cc dng c nhitin

cos = 1+n ng,t lnh,my iu ha:

cos = 0,4 0,6

+Qut in: cos = 0,6 0,8+My thu thanh thu hnh:

cos = 0,8 0,9

V d: Chn MBA iu chnh cungcp cho t lnh 110W, n ng 40W,2qut trn 110W, 2qut bn 55W, l s-i 550W, m un nc 1500W,1ti vi100W, 1my quay bng 80W. in pgi cao im l 130V, bnh thng l220V.

25

K dy cc ch in

h

S vngdyS vng dy

mi lp


26/109


IV.Tng kt bi hc: 5

- Khi nim chumg v my bin p

- Phn loi my bin p

- Khi nim my bin pV. Bi tp v h ng dn t hc

Cu 1: Khi ni cun s cp my bin p vi ngun in mt

chiu s xy ra hin tng g? Ti sao?

Cu 2: Nu khi nim v cng dng ca my bin p mt pha

cng sut nh?

VI. T nh gi v rt kinh nghim

Bi 9: thc hnhtnh ton my bin p mt pha cng sut nh

I/ Mc tiu bi hc:1. kin thc:- HS hiu c cu to ca my bin p- HS hiu c trnh t tnh ton thit k MBAmt pha cng

sut nh.2. K nng:

-Tnh ton, thit k c my bin p mt pha cng sut

nh.3. Thi :

...Nguyn c Hng26


27/109

Gio n: in dn dng 105 tit - HS c thc tm hiu cu to v tnh ton thit k MBA1pha cng sut nh.II/ Chun b bi dy:

- Nghin cu bi 9-SGK .- c ti liu tham kho lin quan n bi ging.

- MBA mt pha cng sut nh ( tho v): mi nhm 1 my.-Thc k,thc cp,(hoc pan me) cho mi nhm.-Phiu hc tp, Bng 9-2 SGK.

III/ Qu trnh thc hin bi ging1/n nh lp: 2 pht Kim tra s s lp hc.2/Kim tra bi c: 3

Cu hi: Trnh by cc bc tnh ton my bin p mt phacng sut nh?3/Ni dung bi ging mi: 125

...Nguyn c Hng27


28/109

Gio n: in dn dng 105 titIV. Tng kt bi hc: 5

...Nguyn c Hng

Hot ng ca thy vtr

TGPh

tNi dung bi ging

Hot ng 1: Tmhiu cu to MBA*Gv chia lp thnh ccnhm thc hnh.*Mi nhm HS nhnthit b v dng c thc

hnh.*GV giao nhim v choHS v yu cu thchnh theo cc ni dungnh nu mc tiu bithc hnh.* HS o v ghi kt quvo bng m t cu to

my bin p (9-1).

45 1/Tm hiu cu to My binpBng 9-1.M t cu to My bin p

Li thp Dyqun

Ca s lithp

*GV yu cu HS nu litng bc thc hnh theoni dung thc hnh trn.T nh ginhn thc ca HS.*GV thu phiu thchnh ca cc nhm.

- Quan st v m t cu to Mybin p.- o kch thc li thp.- o ng knh dy qun s cpv th cp.- o kch thc ca s li thp.-Vit phiu thc hnh.

Hot ng 2: Tmhiu trnh t tnh

ton,thit k MBA*GV pht phiu hc tpcho HS v yu cu HStrnh by vo phiuhc tpHS tm hiu v ghi ktqu tm hiu vophiu hc tp- GV thu phiu hc tp.

- GV nu li cc bc HS t nh gi kt quca bn thn.

20 2. Trnh t tnh ton, thit kmy bin p

Phiu hc tpCc bc tnhton thit k Ni dung

Nhngim cn lu

1.2.3.4.5.6.

Hot ng 3: Tnhton thit k MBA 1pha

Gio vin a ra bi tp

tnh ton thit k mybin pHS ch theo di vthc hnh

60 3. Tnh ton thit k my binp mt pha cng sut nhBi tp: Hy tnh ton thit kMBA c cc thng s sau:- in p s cp 220V-50Hz

- in p th cp 24- Cng sut 30VA

Cc bc tnh tonGio vin hng dn hc 1. Xc nh cng sut my

28


29/109

Gio n: in dn dng 105 tit- Nhc li cc ni dung chnh ca bi hc

V. Bi tp v h ng dn t hc

Hy tnh ton thit k MBA c cc thng s sau:in p s cp

220V. in p th cp 24V.Cng sut 60VA; = 0,8


Thng qua t b mn Thanh H, ngy..thng.nm 2009

Ngy son

Bi 10: Vt liu ch to my bin pa/ Mc tiu bi hc:1. kin thc:- HS nm c mt s vt liu thng dng ch to my bin

p.- Cng dng v phm vi s dng cc loi vt liu .

2. K nng:- Nhn bit c cc vt liu thng dng ch to MBA nh vtliu ch to li thp,dy qun ...3. Thi :- HS c thc tm hiu cc vt liu ch to MBA trong thc t.B/ Chun b bi ging:

- Nghin cu bi 10-SGK .- c ti liu tham kho lin quan n bi ging.- Chun b mt s vt liu:

+Vt liu dng lm mch t: L thp k thut in.+ Vt liu dng lm dy qun: Dy may.+ Vt liu cch in: Nha,cao su...

c/ Tin trnh bi ging:STT

Ngy lnlp

Ti lp Vngmt c l

do

Vng mtkhng l do

Ghi ch

123

1/n nh lp: 2 Kim tra s s lp hc.

...Nguyn c Hng

Gio n S 10 S tit: 01(T tit: 23 n tit 23)

29


30/109

Gio n: in dn dng 105 tit2/Kim tra bi c: 3

Cu hi: Em hy cho bit mch t ca MBA c ch to nhth no?Ti sao ngi ta li ch to nh vy?3/t vn vo bi mi:

MBA c ch to t nhng loi vt liu no?Chng ta hy

nghin cu trong bi hc ny.4/Ni dung bi ging: 37

Hot ng ca GV v

HSTG Ni dung

Hot ng 1: Tm hiuvt liu dng lm mcht

*GV t cu hi: Mch tca MBA c cu to nh thno?*HS suy ngh v tr li.*GV gii thch v t lsilc: T l silc cngnhiu th cng d gy,do khng th tng qumc. xc nh mt cch

tng i t l silc chcn gp l thp li.Nu lthp b gy tc l t lsilc trong l thp cao,cnloi thng th chcong,khng gy.

*GV gii thch cho HS hiuv vic ch to li thpMBA,cch sp t cc lthp sao cho hp l.

10 I/ Vt liu dng lm mcht:- Mch t ca MBA c ghp

t nhng l thp KT dy t0,18-0,5mm.Tnh cht lthp KT thay i theo tl silc.(Loi tn c tn tht t l loic cha nhiu silc: Tn c1% silc tn tht3,6W/kg,tn c 2,2% silctn tht 2,4W/kg).

- gim tn tht,cc l tndng cho MBA cng nghipc cch in vi nhau bnglp giy rt mng dn trnmt l tn hoc bng mtlp sn cch in.- Cc l tn cn c b dynh nhau,l tn cngmng,tn tht cng sut(W/kg) cng nh i.- Khi ch to li thp,c thxp xen k tng l mt,hoctng sp hai hoc bn lthp.Tit din tr ca lithp c th tng ln bngcch xp thm l thp,nhngkhng c xp qu mc vkhi b dy ca li thp gpba ln b rng ca tr thvic qun dy s gp khkhn.

...Nguyn c Hng30


31/109

Gio n: in dn dng 105 titHot ng ca GV v

HSTG Ni dung

GV gii thiu bng 10-1

trong sch gio khoa.

- n gin cho vicchun b li thp,c th sdng bng quy cch nhng

mch t dng vi nhng lthp tiu chun sau:(Bng10-1)

Da vo bng ny, ta chnthp KT lm mch ttheo thit k.

*GV t cu hi:+Dy qun MBA thng

lm bng vt liu g?ctnh ra sao?

+Tit din dy qun MBAthng l nhng hnh g?

*GV lu vi HS: Troc khiqun MBA cn d tr s lngv loi dy cho dy SC v

TC ca MBA theo thit k.

10 II/Dy qun My bin p:-Dy qun SC v TC ca

MBA lm bng ng inphn,c bn c hctt,d dt mng khngb t khi qun dy vmm cc lin kt tt.- Dy qun MBA c cngsut ln thng c tit dinch nht hoc hnhvung,cn dy qun MBA

cng sut nh c tit dinhnh trn.- Cc cun dy c th ccun thnh tng bi hocthnh lp lin tc,vng ny stvng kia.Cch qun thnhtng bi nhanh hn,c dngvi in p khng cao.Cchqun thnh tng lp c cch

in s m bo cho myvn hnh an ton hn vcun dy s chim ch thn.

Hot ng 3 : Tm hiuvt liu cch in MBA*GV thuyt trnh: Tuith ca MBA ph thucphn ln vo cht cch

in.Nu cch inkhng y s nguyhi,cn cch in qua mc

15 III/ Vt liu cch in camy bin p:1. Cch in gia ccvng dy.

Dy qun ca MBA gm

2loi:- Loi dy bc:c cch inbng lp t t nhin hay

...Nguyn c Hng31


32/109


HSTG Ni dung

s lm tng kch thc v githnh.

Cch in chnh ca

MBA gm:- Cch in gia cc vngdy.- Cch in gia cc lpdy.- Cch in gia cc dyqun vi nhau v vi v.

Bng10-2Giy lt cch in gia cc

lp

ng knh dyqun (mm)

Giy cch in


33/109


HSTG Ni dung

* GV lu vi HS rng: Cch

tm nhng cun dy votrong nha cch inkhng m bo nu dyqun c nhiu lp.Cchtm ny c khi cn c hii vi dy may,v cnhng cht tm v nhanng s lm hng lp may.

qun vi v my bin pbng:

2Um +1000V

Um l in p nh mcca dy qun.in p th nghim nykhng nh hn 2000V.- Cch in ca cc dyqun cn chu ng cin p th nghim trong 5 pht m khng xy raphng in.

- Nu dng giy tm du dy0,06mm chu c in pnh thng 1000V, cchin 2000V th s giy s l(ly h s an ton l 5):

.5 = 10lp- cch in gia dyqun v li thp,ngi ta dnggiy ba lm khun cho cc

dy qun.- hon chnh v tng mccch in,cc MBA c tmsn cch in.Nhng muncho vic tm t hiu qucao,cn phi sy trong chnkhng ri tm di p lc cht tm thm su vo cckhe h ca cun dy.

Bng 10-3 cho in p nhthng ca mt s giy v vicch in dng cho MBA(trs trung bnh thamkho,c th thay i theonh ch to).

IV. Tng kt bi hc: 5- Nhc li ni dung chnh ca bi hcV. Bi tp v h ng dn t hc

Cu hi 1: K tn cc vt liu dng lm mch t my bin p?

...Nguyn c Hng33


34/109

Gio n: in dn dng 105 titCu hi 2: Nu tn v cng dng ca mt s loi vt liu cch

in ca my bin p


...Nguyn c Hng34


35/109


Bi 11- Thc hnhChun b vt liu v lm khun qun my bin p(3t)

Kim tra thc hnh( 1t)

a/ Mc tiu bi hc:1. kin thc:

- Chun b dng c cn thit cho qun my bin p theo thitk

- Lm c khung qun dy theo thit k2. K nng:

Lm c thnh tho cc cng vic chun b vt liu v lm

khun qun MBA.3. Thi :Yu thch cng vic, lun tm hiu v vn dng vo bi thchnh.B/ Chun b bi dy:1/chun b ni dung:


2/Chun b dng dy hc:- Phch cm in, cng tc.- Bn qun dy, panh,ng h o in,khoan,m hn,km

cc loi,bt th in,tuavt,dao,ko...

- Li thp,dy qun cun s cp,th cp,dy in.-Vt liu cch in:Giy cch in,ba cch in,,bng

dnh,bng vi,ng ghen.-Vt liu khc: Sn cch in,nha thng,thic

hn,c,vt,thanh kp...III/ Tin trnh bi thc hnh:

1/ n nh lp: 2 pht Kim tra s s lp hc2/ Kim tra bi c: 3

Cu hi:Trnh by vt liu ch to dy qun my bin p?Dy qun MBA cn m bo nhng yu t g?3/ Ni dung bi thc hnh: 125

Hot ng ca thyv tr

Tg Ni dung bi ging

Hot ng 1: Chun 5 I/Chun b vt liu ch to

...Nguyn c Hng35


36/109

Gio n: in dn dng 105 titb* GV t cu hi:- Mch t phi chunb nh th no? cnch nhng kch thc

g?- Dy qun my binp chun b nh thno?- Vt liu cch incn chun b nhngdng c g?

MBA

- Mch t.- Dy qun my bin p.- Vt liu cch in ca my

bin p.

Hot ng 2: Lmkhun ba

*GV v s khaitrin ln bng v giithch cho HS hiu.

*GV phn thnh ccnhm v yu cu ccnhm thc hnh o vct thn khun trnba theo kch thctrn.

45 II/ Quy trnh thc hnh1/Lm khun ba (ct cch

in hay li qun dy).1. Lm phn thn khun.Phn thn khun phi ph hp

vi li thp my bin p, c kchthc ln hn mi cnh ca li thpt 0,51mm. Chiu dy bakhong 1mm.V d:

Tr gia c kch thc:41x68x146mm.

Ta ct ba theo hnh khaitrin,sau ghp li thnhkhun qun dy.

Hnh 11-1a. Cch o v ct thnkhun

* Thc hnh o v ct thnkhun.

(Cc nhm HS thc hnh lm theoyu cu ca GV).Hot ng 2: Lm 45 2. Lm m khun ba.

...Nguyn c Hng36

Phn dn

146

4168

41

68 41


37/109

Gio n: in dn dng 105 titm khun ba*GV gii thch:

Nu my bin p nhphi c thm hai mtbn gi l m.

GV: V s cch lmm lhun(h 11-1b) lnbng v gii thchcch lm

-Ct ba nh hnh v,giakhot l,gn cht vo trongthn to thnh m khun.-Chiu rng ca m khun phi

nh hn ca s li thp

*Thc hnh lm mkhun(Cc nhm HS thchnh lm theo yu cu

ca GV).

Hot ng 3: Lmct gGV hng dn h sinhcch lm ct gHS ch quan st

25 3. Lm ct g.Lm li g c kch thc bng tr

gia li thp (mi chiu cngthm 1mm) lng khun qun dyvo li g ny v chn cht khi qun dy khun khng bbp

Hot ng 4: nhgiGV nh gi tng ktbi thc hnh

5 III. nh gi kt qu- Cng vic chun b- Thc hin thc hnh ng quytrnh- Thi ca hc sinh khi thchnh- Kt qu thc hnh

Hot ng 5 Kimtra thc hnh

GV: Chp lnbngHS: Lm bi kim trathc hnh tnh tonmy bin p trn giy

45' bi: Hy tnh ton thit kMBA c cc thng s sau:in ps cp 220V-50Hz. in p thcp 110V.Cng sut 50 VAp n v biu im:1. Xc nh cng sut mybin p.(2)2. Tnh ton mch t(2)3. Tnh s vng dy ca cccun dy(2)

4. Tnh tit din dy qunv ng knh dy qun.(2)5. Tnh din tch ca s.(2)

...Nguyn c Hng37

1

2

3

4

5

80

110160

220

250

70


38/109


IV. Tng kt bi hc: 5- Nhc li cc ni dung chnh ca bi hc, nhn xt bui hcV. Bi tp v h ng dn t hc

Cu hi: Nu trnh t lm khun qun my bin p?


Bi 12 : Qun my bin p mt pha

I/ Mc tiu bi hc:1. kin thc:

- Hiu c quy trnh qun my bin p mt pha.- Hiu c yu cu, cch tnh ton ca tng bc khi thit k

my bin p mt pha.2. K nng:

- Bit qun my bin p mt pha cng sut nh.- Bit cch tnh ton tng bc ca quy trnh qun my bin p

mt pha.3.Thi :

- C thi nghim tc trong hc tp .II/ Chun b bi dy:1/chun b ni dung:

- Nghin cu bi 12-SGK .- c ti liu tham kho lin quan n bi ging.2/Chun b dng dy hc:- Phch cm in, cng tc.- Bn qun dy, panh,ng h o in,khoan,m hn,km

cc loi,bt th in,tuavt,dao,ko...

- Vt mu: Li thp,dy qun.- Dng c: Vn nng k kim tra,km,tuavt,bt th

in...- Li thp,dy qun cun s cp,th cp,dy in.- Vt liu cch in: Giy cch in,ba cch in,,bng

dnh,bng vi,ng ghen.- Vt liu khc: Sn cch in,nha thng,thic

hn,c,vt,thanh kp...III/ Qu trnh thc hin bi ging1/ n nh lp: 2 Kim tra s s lp hc

2/ Kim tra bi c: 3Cu hi: Nu cc quy trnh lm khun my bin p?3/ Ni dung bi ging: 125

...Nguyn c Hng38


39/109

-

S vng dy


Hot ng ca thyv tr

TG Ni dung bi ging

Hot ng 1: Tmhiu cch qun dy

MBA* GV din gi: qun dy MBA,ta phitnh s vng dy camt lp v s lp dyqun.

* GV cn lu vi HSrng: Nu s lp dy

qun l s thp phnth nn lm trn.Sau tnh li s vngdy ca mi lp dyqun.GV gii thch cchlm tng bc HSd hiu.(Lu : ly cc udy ra ngoi,chpi dy angqun,bc cchin,nh du ritip tc qun.Ccu dy phi c -a ra cng mt pha).

30 I/ Qun dy my bin p1.Tnh s vng dy ca 1 lp

v s lp dy qun.- S vng dy mt lp c tnh nhsau:

S vng 1lp =

- S lp dy qun c tnh nh sau:

S lp dy qun =

2. Qun dy.- Khi qun vng dy u tin phidng bng vi,v tr u dy

khng nm trong vng cas.Qun dy theo tng lp.Sau khixong mt lp phi lt giy cchin gia hai lp ri tip tc quncc lp sau.- Sau khi qun xong cun dy scp th lt giy cch in sau tip tc qun cun th cp trongqu trnh qun cn theo di s

vng dy trn ng h.- Khi qun xong vng dy lygiy cch in bc bn ngoi 2-3lp, tho cun dy ra khi khung a ra ngoi

Hot ng 2 : Tmhiu cch lng lithp vo cun dyGv hng dn hc sinhcch lng li thp vocun dyHS ch theo di

15 II/ Lng li thp vo cun dy- t ngang cun dy ln lt lngcc l thp ch E v ch I hoc lthp ch U v ch T. C 2,3 l lio u,nh vy s gim c kheh khng kh.- Vn quan trng l c gng

...Nguyn c Hng39

K dy(k c

Tng s vng


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v trTG Ni dung bi ging

GV? cc l thp khighp cho tht phngta cn lm g?HS tr li

lng ht s l thp tnh. Nukhng , khi lm vic MBA snng qu mc cho php v mau

hng.- Khi ghp,dng ba g v ccl thp cho tht phng.

Hot ng 3 : Tmhiu cch o vktra

* GV din gii: Khiqun xong MBA,ta cnkim tra thngmch,kim tra chmli, kim tra cchin.*GV gii thiu s kim tra chm lihnh 12.3

GV? kim tra intr cch in giady qun v li thpta lm th no?HS tr li

20 III/ o v kim tra khi cha ningun.1. Kim tra thng mch

Dng ng h vn nng hoc nkim tra kim tra thng mch.2.Kim tra chm liDng n kim tra ngn mch,mtu dy chm vo li thp,ukia chm vo u dy qun.Nun sng l cun dy b ngnmch vi li thp.3.Kim tra cch in

o in tr cch in gia dyqun v li thp t gi tr 1M lt yu cu.

Hot ng 4 : Tmhiu cch sy, tmcht cch in

GV? Em hy nu mcch ca vic tmsy cht cch in?HS tr liGV? Hy k tn mt sloi vt liu tm mem bit?HS tr liGv tng hp kin vkt lun

20 IV/ Sy, tm cht cch in1. Mt s vt liu tma) Cc cht vecni bo: l nhngcht vecni gc du tho mc maukh(du gai) c c tnh tr lncng di tc dng ca xi.Cc loi vecni t nhin hoc nhnto: pha trong mt cht ha tan th-ng l tinh du. Lng cht ha tankhng qu 60% ca hn hp. T lny ch mt cht vecni lng c th thm su vo cc cundy v kh nhanh.b) Cc cht nha: l nhng cht cth ha lng nhit cao nh:nha ng hoc nha hn hp,khi

...Nguyn c Hng40


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* GV gii thch trnht tm, sy HS d

hiu.Sau cn yucu HS lu :- Khi tm dy mayphi ch chtha tan khng lmhng may. Do cn chn vecni khnhanh.- Sau khi tm nn qutthm mt lp vecni bcngoi chngm,hi axit

ngui tr ln cng.c) Cc cht sn tng hp: t cdng trong cc my bin p nh v

n lm hng cht may.2. Trnh t tm, sy.Cng vic tm sy c theo mttrnh t: Sy kh cun dy nhit cao 600C trong khong3h.- Ngm vo cht cch in(vecni)cho n khi khng cn btni ln l c.

- Nhc khi mytm ra khi chtcch in ln gi cho chy htcht vcni tha.- Sy kh nhit 70->750C.C chu k tm chim thi gian

Hot ng 5 : Tmhiu cch lp rpMBA vo v

Gv? Em hy nu th tcc bc lp rp mybin p vo v?HS tr li

15 V/ Lp gip my bin p vo v- Ni cc u dy vo chuynmch, ng h, aptmt, mch bov.

- Chuyn mch, ngh,aptmt,...phi c c nhtrn v my v tr thun tin khis dng v p v hnh thc.- Kim tra cc ch s ca ngh, chung bo.

Hot ng 6 : Tmhiu cch kim trakhi ni ngun vvn hnh th

GV? kim trakhng ti ca mybin p ta cn kimtra nhng yu cu noca my?HS tr li

GV? Khi my bin p

20 VI/ Kim tra khi ni ngun vvn hnh th.1. Kim tra khng ti ca mybin p- Cho my chy th khng tikhong 30 pht. Nu t nhngyu cu sau l my tt:+ Nhit ca my khng qu

400C.+ My vn hnh m khng c

ting ku r pht ra t li MBA.+ Khng c hin tng chp mch

hai cun dy.+ in p ra ph hp vi in p

...Nguyn c Hng41


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c chy ti kimtra my c vn hnhtt khng ta cn kim

tra cc yu cu noca my?HS tr li

thit k.2. Kim tra c ti my bin pVn hnh my bin p vi ch

y (ng vi cng sut thitk v dng in nh mc) trongthi gian khong 30 n 45 pht,nu my tt s t nhng yu cusau:- Nhit ca my khng vt qu500C .- My chy khng rung, khng cting ku r t li thp MBA.

- in p ra ng tr s thit k.IV. Tng kt bi hc: 5- Tng kt nh gi bui thc hnh- nhc cng vic chun b cho bi sauV. Bi tp v h ng dn t hcCu hi: Em hy nu cc bc qun my bin p mt pha?VI. T nh gi v rt kinh nghim

Thc hnh : Qun my bin p mt pha

I/ Mc tiu bi hc:1. kin thc:- Bit qun my bin p mt pha u v cht tay.- Lp rp c my bin p vo v- Kim tra v vn hnh th my bin p khi khng c ti v

khi c ti .2. K nng:

- Lm c thnh tho nhng cng vic v my bin p3. Thi :- HS c thc nghim tc trong thc hnh qun MBA 1pha

cng sut nh.II/ Chun b bi dy:1/chun b ni dung:


2/Chun b dng dy hc:- Phch cm in, cng tc.

...Nguyn c Hng42


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Gio n: in dn dng 105 tit- Bn qun dy, panh, ng h o in, khoan, m hn,km

cc loi, bt th in, tuavt, dao, ko, vn nng k...- Li thp, dy qun cun s cp, th cp, dy in.- Vt liu cch in: Giy cch in,ba cch in,,bng

dnh,bng vi,ng ghen.

- Vt liu khc: Sn cch in, nha thng, thic hn, c, vt,thanh kp...- Cc loi vt liu theo tnh ton v thit k.

III/ Qu trnh thc hin bi ging1/ n nh lp: 2 Kim tra s s lp hc2/ Kim tra bi c: 3

Cu hi: Nu cc quy trnh lm khun my bin p?3/ Ni dung bi ging:

Hot ng ca thyv tr

Tg Ni dung bi ging

Hot ng 1: ChunbGV nhc nh hc sinhchun b cho bi thchnh

20 A. Chun b- Cng tc, phch cm in,- Bt th in, ng h o in,khoan, m hn, km cc loi, dao,ko, panh, bn qun dy.

- Cc loi vt liu theo tnh ton vthit k.B. Quy trnh thc hnh

Hot ng 2: Qundy MBA

60 I/ Qun dy my bin p.- Tnh s vng dy ca 1 lp- Tnh s lp dy qun- Qun dy* Tnh s vng dy cc cun dy:

GV ? Nu cng thctnh s vng dyqun s cp v thcp ?HS tr li

GV ? Tit din dyqun c tnh th

no ?HS tr li

+ S vng cun dy s cpN1 = U1 .n+ S vng dy cun th cp

N2= (U2+10%U2)n*Tnh tit din dy qun:

+ Tnh tit din dy qunTit din dy qun s cp v thcp t l vi dng in trong dy

dn v t l nghch vi mt dng in cho php

...Nguyn c Hng43


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Sdq= mm2

I: l cng dng in AJ: l mt dng in cho php(A/mm2)

+Tnh ng knh dy qun trabng 8-5*Tnh din tch ca s li thp:

Scs = h.ch = 3c

*Sp xp dy qun trong ca

s:- Tnh s vng dy mi lp:

GV? Em hy nhc licng thc tnh svng dy qun?HS tr li

S vng dy mi lp =- 1

- Tip ,tnh s lp dy qun

bng cch chia tng s vng chos vng ca mi lp:S lp dy qun =

GV ? Em hy gii thchcc s dng bn qundy khi qun dymy bin p ?HS tr li

* S dng bn qun khi qundy :

- ng h m s vng qun nmngang ( trn) quay c mt vngtc l qun c 100vng dy.- ng h m vng qun ng (di) quay c mt vng tc l qun c 10.000vng dy.- Chnh kim ng h v s 0 trckhi qun

- Cc u dy qun vo trc trcbn qun

...Nguyn c Hng44

S vngdyS vng dy

mi lp

K dy ccch in

h


45/109



Hot ng 3 : Lngli thp vo cundy* GV hng dn HS lngli thp vo cundy:HS : Cc nhm HS thchin cc bc ca bithc hnh).

60 II/ Lng li thp vo cun dyt ngang cun dy ln lt ng

cc l thp ch E trc sau ngcc l thp ch I ch c 2 l thpli o u mt ln khi ghp dngba g g nh lm cho l thp tht

phng.

Hot ng 4 : o vkim tra khi cha ningun

GV hng dn hc sinhcch o v kim tramy bin p khi chac ngun inHS ch nghe ging* GV yu cu HS trnhby li cch o, cchkim tra MBA khi chani ngun:

60 III/ o v kim tra khi cha ningun.1. Kim tra thng mchDng ng h vn nng hoc nkim tra kim tra thng mch.2. Kim tra chm liDng n kim tra ngn mch,mtu dy chm va li thp,u

kia chm vo u dy qun.Nun sng l cun dy b ngnmch vi li thp.

3. Kim tra cch ino in tr cch in gia dyqun v li thp t gi tr 1M lt yu cu

Hot ng 5: Tm

sy cht cch in* GV gii thch trnht tm, sy HS d

60 IV/ Tm v sy cht cch in

* Trnh t tm, sy.- Sy kh cun dy nhit cao 600C trong khong 3h.

...Nguyn c Hng45

S kim trachm li


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hiu. Sau cn yucu HS lu :- Khi tm dy mayphi ch chtha tan khng lmhng may.Do cnchn vecni kh nhanh.- Sau khi tm nn qutthm mt lp vecni bcngoi chng

m,hi axit

- Ngm vo cht cch in(vecni)cho n khi khng cn btni ln l c.- Nhc khi mytm ra khi chtcch in ln gi cho chy htcht vcni tha.- Sy kh nhit 70->750C.C chu k tm chim thi gian t40 n 50 gi.

Hot ng 6: Lprp my bin p vovGV hng dn HS cch

lp gip MBA vo v:- Ni cc u dyvo chuyn mch,

ng h, aptmt,mch bo v.-Chuyn mch, ngh, aptmt,...phi -

c c nh trn vmy v tr thuntin khi s dng vp v hnh thc.(Cc nhm HS thchin cc bc ca bithc hnh).

60 V/ Lp gip my bin p vo v- Ni cc u dy vo chuynmch, ng h, aptmt, mch bov.-Chuyn mch, ngh,aptmt,...phi c c nhtrn v my v tr thun tin khi

s dng v p v hnh thc.- Kim tra cc ch s ca ngh, chung bo.

Hot ng 7: Kimtra v vn hnh th

* GV hng dn HS

kim tra MBA khi ningun v vn hnhth nh sau:

60 VI/ Kim tra khi ni ngun vvn hnh th.1. Kim tra khng ti ca mybin p

- Cho my chy th khng tikhong 30 pht.Nu t nhngyu cu sau l my tt:

...Nguyn c Hng46


47/109



- My chy khng rung,khng c ting ku rt li thp MBA.- in p ra ng trs thit k.(Cc nhm HS thchin cc bc ca bithc hnh).

+ Nhit ca my khng qu400C.

+ My vn hnh m khng cting ku r pht ra t li MBA.+ Khng c hin tng chp mch

hai cun dy.+ in p ra ph hp vi in p

thit k.2. Kim tra c ti my bin pVn hnh my bin p vi ch

y (ng vi cng sut thitk v dng in nh mc) trongthi gian khong 30 n 45pht.nu my tt s t nhng yucu sau:- Nhit ca my khng vt qu500C .

Hot ng 8: nh

gi kquGV rt ra nhn xtbui thc hnh vnh gi theo cc tiuch

15 C/ nh gi kt qu

1. Cng vic chn b2. Thc hin thc hnh ng

quy trnh3. Thi 4. Kt qu thc hnh

IV. Tng kt bi hc: 5- Nhn xt tng kt bui thc hnh; Gii p thc mc- Nhc cng vic chun b cho bi sau

V. Bi tp v h ng dn t hcCu hi: Em hy nu cc bc qun my bin p mtpha?VI. T nh gi v rt kinh nghim

Chng III: ng c in

Bi 14: Mt s vn chung v ng c inI/ Mc tiu bi hc:

...Nguyn c Hng47


48/109

Gio n: in dn dng 105 tit1. kin thc:

- Bit c cch phn loi ng c in- Hiu c cc i lng nh mc ca ng c in- Bit c phm vi ng dng ng c in

2. K nng:

- Phn loi c thnh tho cc loi ng c3. Thi :- HS hc tp nghim tc

II/ Chun b bi ging:- Nghin cu bi 14-SGK .- c ti liu tham kho lin quan n bi ging.- Chun b mt s tranh v c lin quan n bi ging

III/ Ni dung bi ging:

1. n nh lp: 2 phtim danh kim tra s s

2. Kim tra bi c: 3 phtCu hi: Em hy nu cu to v nguyn l lm vic ca mybin p?3. Ni dung bi ging 80

...Nguyn c Hng48


49/109

Gio n: in dn dng 105 titIV. Tng kt bi hc: 5

...Nguyn c Hng

Hot ng ca thyv tr

TG Ni dung bi ging

Hot ng 1: Tmhiu khi nim C* GV t cu hi: ng c in lmvic theo nguyn lno? Bin i dngnng lng no? Cho vd?*HS tr li

15 I/ Khi nim v phn loi ngc in1. Khi nim- ng c in l thit b in.- Lm vic theo nguyn l cm ngin t.- C dng bin i innng thnh c nng lm quay mycng tc.V d: My bm nc, qut in,my nn kh, my tin, mykhoan...

Hot ng 2: Tmhiu phn loi C

GV? Em hy nu cchphn loi ng cin?HS tr li

GV? Th no l phnloi theo dng in?HS tr li

GV? Em hy nu cchphn loi ng cin theo nguyn llm vic?HS tr li

25 2. Phn loi ng c ina) Theo loi dng in:- C lm vic vi dng in xoaychiu gi l C xoay chiu.- C lm vic vi dng in mtchiu gi l C mt chiu.Vi C xoay chiu, ngi ta phn raba loi sau:+ C ba pha: C ba dy qun lmvic, trc cc dy qun lch nhautrong khng gian mt gc1200in.

+ C hai pha: C hai dy qunlm vic, trc cc dy qun lchnhau trong khng gian mt gc900in.

+ C mt pha: Ch c mt dyqun lm vic.

b) Theo nguyn l lm vic:C xoay chiu c chia lm hailoi:

+ CKB: L loi CXC c tc quay ca rto(n) nh hn tc quay ca t trng(n1).

+ CB: L loi CXC c tc quay ca r to(n) bng tc quay ca t trng(n1).

Hot ng 3: Tmhiu cac s liunh mc ca C

GV: Cc i lngnh mc l s liuk thut quan trng

30 II/Cc i lng nh mc cang c in v phm vi ngdng.1.Cc i lng nh mc cang c in.- Cng sut c c ch trn trc

49


50/109

Gio n: in dn dng 105 tit- Tng kt kin thc chnh trong bi v nhc cng vic chunb cho bi sauV. Bi tp v h ng dn t hcCu hi: Nu khi nim v cch phn loi ng c in?VI. T nh gi v rt kinh nghim

ng c in xoay chiu mt pha

I/ Mc tiu bi hc:1. kin thc:

- Bit c cu to, nguyn l lm vic v ng dng ca

ng c in xoay chiu mt pha.

2. K nng:

- Hiu cv phn bit c ng c in mt pha

vng chp v ng c in chy bng t.3. Thi :

- HS hc tp nghim tc, c thc tm ti v lin h thc

t.

II/ Chun b bi ging:

- Nghin cu bi 15-SGK .

- c ti liu tham kho lin quan n bi ging.

- Chun b mt s tranh v c lin quan n bi ging

III/ Ni dung bi ging:

1. n nh lp: 2 pht

2. Kim tra bi c: 3 pht

Cu hi: Em hy nu khi nim v cch phn loi ng c

in?

3. Ni dung bi ging : 80

...Nguyn c Hng50


51/109


Hot ng ca thyv tr

Tg Ni dung bi ging

Hot ng 1: tmhiu th nghimnguyn l c khngng b

GV gii thiu m hnhth nghim hnh 15.1SGKHS ch quan st

GV? Theo em ti sao n hoc < 220v s ra sao?Cn phi lm g trc khi s dng my

gitTrong thi gian my ang chy cn ch g?Hot ng 3: Xc nh v tr t myv ngun cung cp- GV t cu hi v yu cu v tr tmy- GV yu cu hs tm hiu cc s liungun in v ngun nc

Hot ng 4: Chun b git- GV yu cu hs gii thch v sao phi

b ht vt cng ra?- GV hi: Khng git ln nhng gitg vi nhau? V sao?Hot ng 5: Chn ch git v vnhnh my git- Gv t cu hi: Chn ch git chyu ph thuc vo tiu ch g?

- GV hng dn hs sd cc phm chnch git- HS xc nh v theo di cc cng on

10

20

10

5

60

I. M u:- Gii thiu bi hc- Kim tra s chun b- Chia nhm

II. Quy trnh thc hnh1. Tm hiu cc s liu kthut- Dung lng my- p sut ngun nc- Mc nc trong thng- Lng nc tiu tn cho cln git- Cng sut ng c in- in p ngun cung cp- Cng sut gia nhit

2. S dng v bo dng my

git- Chn vtr t my- chn ngun in ph hp- kim tra ngun nc- chun b git- chuyn ch git- bo dng my git

...Nguyn c Hng82


83/109

Gio n: in dn dng 105 titmy git thc hinHot ng 6: Bo dng my git- HS nu cc ni dung bo dng- GV nu cu hi cho tng cng vic

bo dng

- GV hng dn hs trao i v cc hhng v cch khc phc nh SGK. Nuc th tng hin tng, gii thchnguyn nhn v nu cch khc phcGV quan st v gii p thc mc HSHot ng 7: nh gi kt qu- GV hng dn HS t nh gi theocc tiu ch :HS: T nh gi bi lm theo cc tiuch nu ra- Yu cu cc nhm np bo co thchnh

15

5

III, nh gi kt qu1. Cng vic chun b2. Thc hin thc hnh theong qui nh

3. thc thc hin an ton laong v thc thc hin gign v sinh mi trng4. Kt qu thc hnhIV/ Kt thc:

Thu dn dng c v sinhphng thc hnh

IV. Tng kt bi ging: 3Tng kt li cc k nng chnh cn lu trong bi thc hnh

Nhn xt gi thc hnhGii p thc mcV. Cu hi bi tp v hng dn t hc:

- Nu cc thng s k thut ca my git? Theo em, cc thng s k thut nothng c ngi tiu dng quan tm nht?- V tr t my git nh th no l hp l?- My git l thit b c s dng thng xuyn trong gia nh. Sau vi tun sdng nn c bin php v sinh my git nh th no?- V nh xem li bi v c trc bi miVI. T nh gi v rt kinh nghim bi ging:

GIO N S: 24S tit:2(t tit 66 n 67)

CHNG IV: MNG IN TRONG NHBi 23: MT S KIN THC C BN V

CHIU SNGI. Mc tiu.

a. V kin thc- Bit c mt s i lng o nh sng thng dng- Bit dc cc bc thit k chiu sng bng phng php h s s dng

b. V ki nngS dng cc i lng o nh sng v bit thit k chiu sng trong gia nh

c. Thi

...Nguyn c Hng83


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Gio n: in dn dng 105 titNghim tc trong hc tp, c tinh thn hp tc trong nhm

II. Chun b.- Dng c quang thng- Bng biu trong bi 23

III. Qu trnh thc hin bi ging

1. n nh lp: 22. Kim tra bi c: Kh3. Ni dung bi ging: 85

Hot ng ca thy v tr Tg Ni dung- GV hng dn hs quan st vm s lng n uc b trtrong lp hc, t cu hi:Vi s n nh vy lp hc

nh sng cha?B tr bng trong lp hp lcha? V tr no cha nhsng?- Trn c s cu tr li ca hs, Gvnu mc tiu v ni dung bi hcHot ng 1: Tm hiu mt si lng o nh sng thngdng- Yu cu HS c SGK

- Em hy nu khi nim v quangthng? K hiu v n v oquang thng?- Em hy thng tin trong SGK- Treo bng 23.1- Gv t cu hi: Tm hiu thngs k thut ca mt s loi ntrong bng 23.1. Hy so snh vcho mt s v d loi n tit

kim in nng?- GV nhn xt ging giiGV yu cu hs c sch v tcu hi:Em hy nu khi nim, k hiu,

v n v o cng sng?GV: ging gii v v d v I ca 1s ngun sng thng dng- Em hy nu khi nim, k hiu,

v n v ri?- Cng thc tnh ri l g?- Ngi ta quy nh mt s tiu

5

35

Gii thiu bi hc:

I. Tm hiu mt s i lng o nhsng thng dng1. Quang thng- Quang thng l lng nh sng cangun sng pht ra- K hiu l , n v o l lumen (lm)

- Hiu sut pht quang (HSPQ) cangun sng c xc nh

n c HSPQ cao l n tit kimin nng2. Cng sng- K hiu I, n v o candela (cd)3. ri- ri cho ta bit mc c chiu

sng ca b mt- K hiu E, n v lux (lx)- ri c nh nghaTrong :E l ri (lx) l quang thng (lm)S l din tch c chiu sng (m2)4. chi- K hiu L, n v cd/m2

II. Thit k chiu sng

...Nguyn c Hng84


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Gio n: in dn dng 105 titchun v ri nh th no?- Treo bng 23.2- GV nhn xt- Em hy nu khi nim, k hiu,v n v chi?

- Em hy c thng tin thm v chi.Hot ng 2: Tm hiu thit kchiu sngGV t cu hi: Thit k chiusng l g?GV: C my phng php thitk chiu sng trong nh thngdng?- Khi thit k chiu sng ngi tada vo yu t no?- Khi thit k chiu sng trongnh bng phng php h s sdng ta cn tnh ton nhng thngs no?HS: lm vic theo nhm honthnh bng trong phiu hc tpGV ra bi tp: Mt phng di 9m,rng 6m, cao 2,95m c chiu

sng bng b n bn trc tip csd Ksd = 0,4. ri yu cu E=500lx, h s k=1,3. Xc nhquang thng tng ca cc bngn.HS: Tho lun v tnh ton theonhmGV: Ch nh 1 nhm ln bngtrnh by

GV: Cng sut n v trong trongthit k chiu sng l g? Cngthc tnh?HS trnh byGv ging giiGV: Hy trnh by cc bc thitk s dng phng php cngsut n v

Hs: trnh byGV: h thng li

45

TKCS l tnh ton ri , s lngn, loi n v cch b tr n m

bo nh sng theo yu cu lmvic. Ngoi ra cn cn tnh n chi trnh nh hng k tt n

cng vic, tnh kinh t v thm m1. Thit k chiu sng trong nhbng phng php h s s dngKsda) Xc nh ri theo yu cu : tra

bng 23-2b) Chn ngun sngc) Chn kiu chiu sng : chiu sngtrc tip v bn trc tipd) Tnh quang thng tngksd = 0,2-0,6 tng = k ES/ksd(lm)E l rik l h s d trk = 1,2-1,6S l din tch b mt hu che) Tnh s n v b nf) V s b tr n

2. Thit k chiu sng bng phngphp cng sut n v (sut phti)CSV (p) l t s gia tng cs inton b bng n (P) t trong phngchia cho dt(S) ca phng

Da vo bng cng sut n v p t tnh ra cng sut in chiu sng

ca phng Ptng= p ST xc nh s bng n :

...Nguyn c Hng85


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IV. Tng kt bi ging:Tng kt li cc kin thc chnh trong bi

V. Cu hi , bi tp v hng dn t hc:Lm cu hi v bi tp 1,2,3 SGKV nh xem li ni dung bi hc v chun b bi thc hnh

VI. T nh gi v rt kinh nghim bi ging:....................................................................................................................................................................................................................................................................................................................................................................................................

GIO N S: 25S tit: 3(t tit 68 n 70)

Bi 24:Thc hnhTNH TON CHIU SNG CHO MT PHNG HC

I. Mc tiu.a. V kin thc

- Thit k chiu sng c cho mt phng hcb. V ki nngVn dng c l thuyt vo thit k

c. Thi Nghim tc, c tc phong lm vic khoa hc

II. Chun b.- Giy, bt, my tnh b ti- Thc k, compa, ke

III. Qa trnh thc hin bi ging1. n nh lp: 22. Kim tra bi c: 5

Cu 1: Nu khi nim quang thng?Cu 2: K tn cc bc tk chiu sng trong nh bng phng php ksd

3. Ni dung bi ging: 125

Hot ng cu thy v tr T g Ni dungHot ng 1: gii thiu mc tiubi thc hnh v chun b- Gv nu mc tiu, yu cu bi thc

hnh v ni qui- GV nu mc ch ca tk l chnc s lng bng n, b n v

10 I. M u:1/ Gii thiu mc tiu, ni qui2/ Chia nhm

3/ Kim tra vic chun b4/ Nhn dng c v vt liu

...Nguyn c Hng86


87/109

Gio n: in dn dng 105 titb tr c cc b n m bo ri v u nh sng- Gv chia nhm thc hnh- HS: nhm trng ktra vic chun

b bo co thc hnh ca tng bn

- Cc nhm nhn dng c v vtliu thc hnhHot ng 2: Chun b phn bthi gian v yu cu- GV: Khi thit k chiu sng cho

phng hc, trong cc bng n sau:n HQ 0.6m; HQ 1.2m; Compact;si t nn chn loi no? V sao?- HS: suy ngh tr li: n 1.2m

Hot ng 3: Tnh ton v chn c c s bng n v s bn cn thit

Gv: ri yu cu ca lp hc lbao nhiu?HS: tr li 300-400lxGv: nhc li v chn 300lxGv: gii thch nn chn loi n

36w-3200lxGV: Gii thch nn chn kiu chiusng trc tip m rngGv yu cu hs nhc li cng thctnh quang thng tngHs: Tng nhm tnh quang thngtngGV: hi kq tng nhm v nhn xtGv: hng dn cch tnh s bng

n v s b nHS: tnh tonGV: Hi kq tng nhm

Hot ng 4: V s b tr nGV hng dnHS: mi nhm tho lun v v s b tr nGv: thu s ca tng nhm v

nhn xt

Hot ng 5: Tng kt nh gi

10

45

45

10

II, Quy trnh thc hnhBi tp thc hnh: Tnh ton chiusng cho mt phng hc rng a=7m,di b= 8m, cao t trn n nnH=3,8m. Chn n ng hunhquang 1,2m; P=36W; 1bng = 32lm.B n chn vo trn. Mu trn vtng sng

Thit k bng phng php h ss dng- Bc 1: Xc nh ri theo yucu- Bc 2: Chn ngun sng- Bc 3: Chn kiu chiu sng v

b n- Bc 4: Tnh quang thng tng tngk = 1,3ksd chn 0,46 tng = k.E.S/k sd =1,3*300*7*8/0,46= 47478lm- Bc 5: Tnh s n v s b nS bng n l:

N= = 47478/3200= 15bng ly =16- Bc 6: B tr v v s b trn+Tnh khong cch gia cc n v

khong cch n n tng+V s b tr n

III. nh gi kt qu1. Cng vic chun b2. Thc hin thc hnh theo ngqui nh3. thc thc hin an ton lao ngv thc thc hin gi gn v sinh

mi trng4. Kt qu thc hnhIV. Kt thc :

...Nguyn c Hng87


88/109

Gio n: in dn dng 105 tit- Gv t cu hi tho lun: Hy nucch ring b tr 1 b n trntrn- HS tng nhm tho lun- Gv nh gi kq theo cc tiu ch

Thu dn v sinh

IV. Tng kt bi ging: 3Tng kt li cc k nng cn nm vng trong biGii p thc mcV. Cu hi , bi tp v hng dn t hc:Bi tp : Tnh ton chiu sng cho mt phng hc rng a=8m, di b= 9m, cao ttrn n nn H=3,9m. Chn n ng hunh quang 1,2m; P=36W; 1bng = 32lm.B n chn vo trn. Mu trn v tng sng

Thit k bng phng php h s s dngVI. T nh gi v rt kinh nghim bi ging:..................................................................................................................................................................................................................................................................................................................................................................

GIO N S: 26

S tit: 3(t tit 71 n 72) Bi 25: MT S K HIU V NGUYN TC

LP S CP INI. Mc tiu.

a. V kin thc- Hiu c mt s k hiu trn s in- Bit c nguyn tc lp s cp in

b. V ki nng- c c k hiu ghi trn dng c i- Vn dng kin thc vo vic lp s cp in

c. Thi Nghim tc trong hc tp, tinh thn hp tc trong nhm

II. Chun b.- Bng biu bi 25


Cu hi: Trnh by cc bc tin hnh thit k chiu sng cho mt phng hc

bng phng php h s s dng ?3. Ni dung bi ging: 120.

...Nguyn c Hng88


89/109

Gio n: in dn dng 105 titHot ng ca thy v tr Tg Ni dung

Hot ng 1: Gii thiu bihc:GV: lp t c mng inngi th in phi cn c vo

u?HS: S mng inGV: biu th c cc phnt ca mng in trn s ngi ta lm th no?Hot ng 2: Tm hiu mt sk hiu ghi trn s inGV: Hy k tn mt s phn tca mng in cn c thhin trn s ?GV: Treo s bng 25.1HS: quan st bng

Gv: gii thch cc k hiu quicHS: v bng k hiu vo v

Hot ng 3: Tm hiu v lps cp inGV: lp c mng in ta

cn phi lm g?HS: Phi c s GV: yu cu HS c thng tinSGKGV: Treo bng 25.2 v giithch s cp inGV: Gii thiu v s nguynl v s lp dngGV: Hy so snh s khc nhau

gia s nguyn l v s lp dng?GV: Yu cu Hs quan st v

nghin cu cch v s cpin cho phng hc

5

60

5

I. Mt s k hiu ghi trn s inBng 25.1

II. Lp s cp in- S nguyn l mch in ch nu lnmi lin h ca cc phn t trong mch

in, m khng th hin v tr lp t cachng trong thc t- S lp t mch in biu th r vtr, cch lp t cc phn t ca mchin trong thc t

IV. Tng kt bi ging: 8Tng kt bi v nhn xt theo cc tiu chHs nghin cu tr li cc cu hi trong SGKV. Cu hi , bi tp v hng dn t hc:

V li k hiu ca cc phn t mng in:VI. T nh gi v rt kinh nghim bi ging:

...Nguyn c Hng89


90/109

Gio n: in dn dng 105 tit..................................................................................................................................................................................................................................................................................................................................................................


Bi 26: Thc hnhC S MCH IN(3t)KIM TRA THC H NH(1t)


- c c s mch in cung cp cho phng lm vic, s n cu

thang, s in mt tng ca nh chung cb. V ki nngVn dng l thuyt v c s cp in

c. Thi C tc phong lm vic ng quy trnh

II. Chun b cho dy v hc:+ GV: cc s + HS:

- SGK, v bi tp, giy v A4- n li k hiu cc phn t trong s mch in


- Trn bn v cc k hiu in biu th g? Cc k hiu gip g cho ngi thitk v vn hnh mng in?- S nguyn l v s lp t khc nhau im g?


Hot ng ca thy v tr Tg Ni dungHot ng 1: Kim tra schun b ca HS- GV: Gii thiu mc tiu

bi thc hnh v ph binni qui- HS: Nhm trng bo cos chun ca cc bn?

Hot ng 2: Tm hiu ccbc tin hnh- GV gii thch cc bc tin

5

15

I. M u:1/ Gii thiu mc tiu, ni qui2/ Chia nhm3/ Kim tra vic chun b4/ Nhn dng c v vt liu

II. Cc bc tin hnh- Hiu c cch c bn v k thut- Cn nhn bit cc k hiu trn s th

...Nguyn c Hng90


91/109

Gio n: in dn dng 105 tithnh

Hot ng 3: c s cp in cho phng lmvic

- GV: Treo s 26.1 vhng dn cch c- HS: quan st v tho lunc s - GV: Yu cu i din ccnhm HS c s - GV: Khi qut li cch cs Hot ng 4: c s in n c thang iukhin ng ct 2 v trkhc nhau:- GV: Treo s 26.2 vhi: Hy cho bit u l s nguyn l v lp dng?2 cng tc trong s lcng tc g?Hy gii thch nguyn llm vic ca mch in trn

- HS: quan st v tho luntr li cu hi- GV: Yu cu i din ccnhm HS tr li cu hi- Gv: khi qut li v giithch s .

Hot ng 5: c s nguyn l cp in cho

nh chung c :- GV: Treo s 26.3 vhng dn cch c- HS: quan st v tho lunc s - GV: Yu cu i din ccnhm HS c s - GV: Khi qut li v ginggii cch c s nh

chung c

Hot ng 4: Tng kt

30

30

30

15

hin cho phn t no ca mch in, cc sliu k thut ca chng- Cn hiu c cc chc nng ca mi

phn t trong s - Cn bit mc ch ca s : Cung cp

in cho i tng no? Cc loi ti trongs ?- Xc nh ng dy ti- Xc nh cc loi ti ca cn hIII. Thc hnh c s in1. c s cp in cho phng lm vic:Phng lm vic kch thc 26m2 , cc thit

b gm c 1 iu ho kk, 4 b n ng mib 2 n, 2 qut cy.

2. c s in n cu thang iukhin ng ct 2 v tr khc nhau

3. c s nguyn l cp in cho nhchung c

IV. nh gi tng kt1. Cng vic chun b2. Thc hin thc hnh theo ng qui nh3. thc thc hin an ton lao ng, thcthc hin gi gn v sinh mi trng4. Kt qu thc hnh

V. Kt thc: thu dn v sinh lp hc

VI. Kim tra thc hnh: bi: V s nguyn l v lp dngmch in cu thang iu khin ng ct 2v tr khc nhau v c s

Biu im v p n:- V ng s nguyn l: 3- v ng s lp dng: 3

...Nguyn c Hng91


92/109

Gio n: in dn dng 105 titnh gi- GV hng dn HS t nhgi theo cc tiu ch- HS: T nh gi bi lmtheo cc tiu ch nu ra

- Gv nhn xt gi thc hnh- Yu cu cc nhm np boco thc hnhHot ng 5: Kim trathc hnhGV: Ra HS: V v ghi li c s ra giy

45

- c c s nguyn l: 2- c c s lp dng: 2

IV. Tng kt bi ging: 8+HS tr li cu hi :- c tt s mch in cn phi lm g?- c s nguyn l n cu thang iu khin ng ct 2 v tr khc nhau?- c s nguyn l cung cp in cho mt nh chung c?+ Tng kt li cc k nng cn nm vng trong bi+ Gii p thc mcV. Cu hi , bi tp v hng dn t hc:- V nh xem li ni dung bi hc v chun b bi tip theoVI. T nh gi v rt kinh nghim bi ging:

...................................................................................................................................

...................................................................................................................................

Thng qua t b mn Ngy........thng..........nm 2009Ngi son


Bi 27 : TNH TON, THIT K

MNG IN TRONG NH


- Trnh by c cc bc thit k mng in

...Nguyn c Hng92


93/109

Gio n: in dn dng 105 tit- Tnh ton, thit k c mng in n gin cho mt phng

b. V ki nngTnh ton, thit k c mng in n gin cho mt phng

c. Thi Nghim tc trong hc tp

II. Chun b.Cc bng biu v hnh v trong bi 27III. Qa trnh thc hin bi ging

1. n nh lp: 52. Kim tra bi c: 5

Cu hi: c tt s mch in cn phi lm g?3. Ni dung bi ging: 240

Hot ng ca thy v tr Tg Ni dungHot ng 1: Tm hiu cc bctin hnh thit k mng in- GV: Yu cu hs c SGK v trli cu hi: Nu cc bc trnh tthit k mng in?HS: nghin cu SGK v tr liGV: gii thch cc bc

Hot ng 2: Tnh cng sutyu cu ca ph ti i vi

mng inGV: Yu cu HS c SGk v trli cu hi: nu cng thc tnhcng sut yu cu ca mng inHs: Nc SGK v tr liGV: Khi qut liHS: K bng 27.1 vo vHot ng 3: Tm hiu mt s

yu cu s dng mng in

trong nhGV: Yu cu HS c SGk v trli cu hi: Nu cc yu cu sdng mng in trong nh?Hs: Nc SGK v tr liGV: Khi qut li

Hot ng 4: Tm hiu phngn thit k s mng in

theo kiu phn nhnh t ngdy trc chnhGV: Yu cu HS c SGk v tr

20

20

20

45

Trnh t thit k mch in nh sau:- Bc 1: Xc nh mc ch, yu cus dng mng in- Bc 2: a ra cc phng n thitk v la chn mt phng n thchhp- Bc 3: Chn dy dn, thit b bov, ng ct v ngun ly in camng in- Bc 4: Lp t v kim tra mch

in theo mc ch thit k- Bc 5: Vn hnh th v sa chanhng li (nu c)I. Xc nh, mc ch yu cu sdng mng in1. Tnh cng sut yu cu ca ph tii vi mng inPyc = Pt . kyc

2. Mt s yu cu s dng mng introng nh- t tiu chun an ton in- s dng thun tin d ktra v sacha- Khng nh hng gia mach chiu

sng v cc mch cung cp- t yc KT v m thut

...Nguyn c Hng93


94/109

Gio n: in dn dng 105 titli cu hi: Nu cc c im vu nhc im ca phng n tks theo kiu phn nhnh tng dy trc chnh?Hs: Nc SGK v tr li

GV: Khi qut liGV: treo s 27.1 v gii thchHot ng 5: Tm hiu phngn thit k s mng intheo kiu tp trungGV: Yu cu HS c SGk v trli cu hi: Nu cc c im vu nhc im ca phng n tks theo kiu tp trung?Hs: Nc SGK v tr liGV: Khi qut liGV: treo s 27.2 v gii thchHot ng 6: Tm hiu cchchn dy dn inHS c thng tin SGKGV: Cu hi: Trnh by cchchn tit din dy dn?HS: tr liGV: khi qut kin thc

GV: Cu hi: Trnh by cchchn chiu di dy dn?HS: tr liGV: khi qut kin thcGV: Cu hi: Trnh by cchchn v cch in dy dn?HS: tr liGV: khi qut kin thcHot ng 6: Tm hiu cch

chn cc thit b inGv: Nu cch chn cu ch?HS: Ng/c SGK v tr liGV: Khi qut liGv: Nu cch chn cu dao hocaptmt?HS: Ng/c SGK v tr liGV: Khi qut liGv: Nu cch chn cc thit b

ng ct v ly in?HS: Ng/c SGK v tr liGV: Khi qut li

45

30

30

II. Phng n thit k s mngin1. Thit k s mng in theo kiu

phn nhnh t ng dy trc chnh:+ c im:

+ u, nhc im:

2. Thit k s mng in theo kiutp trung+ c im:+ u, nhc im:

III. Chon dy dn v cc thit b

in1. Chon dy dn- Tit din dy: Isd Icp- Chiu di dy dn: Tnh theo s lp t + mi ni- V cch in: ph hp in p v klp t

2. Chn cc thit b in- Chn cu ch- Chn cu dao hoc aptomat- Chn cc thit b ng ct v ly

in

...Nguyn c Hng94


95/109


Hot ng 7: Tm hiu cch lpt v kim tra mng in theomc ch thit k- Yu cu HS c thng tin SGK

- GV treo hnh 27.3 v gii thch- GV ging gii cch lp t vkim tra mng in theo mc chthit k

30

IV. Lp t v kim tra mng intheo mc ch thit k

IV. Tng kt bi ging: 5+ Tng kt ni dung chnh trong bi, Gii p thc mcV. Cu hi , bi tp v hng dn t hc:- V nh xem li ni dung bi hc v chun b bi tip theoVI. T nh gi v rt kinh nghim bi ging:....................................................................................................................................................................................................................................................................................................................................................................................................

Thng qua t b mn Ngy........thng..........nm 2009Ngi son

...Nguyn c Hng95


96/109



Bi 28: Thc hnh

TNH TON, THIT K MNG IN

CHO MT PHNG I. Mc tiu.a. V kin thc

- Tnh ton, thit k c mng in n gin cho 1 phng - Thc hin c cc bc tnh ton v thit k c bn theo ng quy trnh

b. V ki nng- Thit k c mng in n gin

c. Thi Lm vic nghim tc v chnh xc

II. Chun b.- Bn v mt s k hiu quy c trong s in v bn v xy dng- Mt s bn v xy dng v thit k mng in cho mt phng - Giy kh A2 (mi nhm 1 t), thc k, bt ch, ty- Chun b cc phiu hc tp cho mi nhm thc hnh


- Trnh by trnh t thit k mch in trong nh?- La chn dy dn trong thit k mng in trong nh, cn ch cc yu t no?


Hot ng ca thy v tr Tg Ni dungHot ng 1: Gii thiu mctiu bi thc hnh v chun bGV:- nu mc tiu bi thc hnh- chia nhm thc hnh

- Yu cu nhm trng kim travic chun b bo co thc hnhca tng nhm vinHS: cc nhm nhn dng c vvt liu thc hnhHot ng 2: Tm hiu quytrnh thc hnhGV:

- Chp bi tp thc hnh ln bngCu hi: Nu trnh t tnh ton vthit k mng in:

10

20

I. M u:

II. Quy trnh thc hnhBi tp thc hnh:Tnh ton, thit k mng in ngin cho mt phng c din tch l18m2( 3x6m), chiu sng trc tip,tng nh mu sng. in p ngunl 220v. Cc dng in d tnh sdng trong phng c cng sut:( bng

SGK)Tnh ton, thit k mng in ctin hh theo trnh t sau:

...Nguyn c Hng96


97/109

Gio n: in dn dng 105 titHS: Nhc li trnh tGV: gii thch li

Hot ng 3: Thc hnh thitk mch in

Hs: cc nhm tho lun v cc bc thc hnh thit k mchinGV: hng dn HS tin hnh thitk theo cc bc trong SGK hng dn n bc v s nguyn l mch in+ Xc nh mc ch, yu cu sd:+ Ra phng n thit k+ Tnh, chn , b tr dy dn vthit b inGV: theo di cc nhm lm vicv c un nn kp thiGV: hng dn HS cch v s

b tr ng dyHS: V s trn kh giy A2GV: Gim st v un nn sai st

Hot ng 4: Bo co kt qu

thit k mch in:- GV: yu cu mi nhm bo cokt qu thit k mch in canhm,HS: cc nhm khc nhn xtGV: cho kin kt lunHS: np bn vGV: nhn xt KQ tng nhm vcho kin kt lun

Hot ng 5: Tng kt nh gigi thc hnh- GV: nhn xt, tng kt gi thchnh : kt qu thc hnh, quitrnh tin hnh, thi gian honthnh v thi tham gia thchnh ca cc nhm- GV hng dn HS t nh githeo cc tiu ch

- Yu cu cc nhm np bo cothc hnh

75

10

10

1. Xc nh mc ch, yu cu sdng2. a ra phng n thit k3. Chn dy dn v thit b in4. Lp t v kim tra

5. Vn hnh th1. Tnh cng sut yu cu yu cuca mng in:- cng sut chiu sng:P1 = S x 14 = 18.14=252wTa sd 8 bng loi 32w

Tng CS nh mc l:Pt = 252 + 40 +110 + 1000 +1000=2402w2. Chn dy dn v thit b in- Tnh tr s dng in sd: Ly kyc=1- I sd mch chnh l: Isd= kyc.Pt/Udm=1.2402/220=10,9ATra bng 27-3 chn dy dn mchchnh bng ng c 2x2,5mm2 v dychy bng ch c ng knh 1,4mmCc mch nhnh trong phng chon, qut chn dy dn 2x1,5mm2 vcc ng dy cho cm chn dy

2x2,5mm23. B tr ng dy:V s b tr ng dy in theokiu phn nhnh t ng dy chnhIII. nh gi kt qu1. Cng vic chun b2. Thc hin thc hnh theo ng quinh3. Thi : thc thc hin an ton

lao ng, thc thc hin gi gn vsinh mi trng4. Kt qu thc hnhIV. Kt thc:Thu dn v sinh phng hc

...Nguyn c Hng97


98/109

Gio n: in dn dng 105 titIV. Tng kt bi ging: 3Tng kt bui thc hnh v gii p thc mcV. Cu hi , bi tp v hng dn t hc:- Em hy nu trnh t tnh ton, thit mng in cho 1 phng ?- Em hy v thit k mng in cho phng theo nh yu cu ca bi tp trang

133 SGK- V nh xem li ni dung bi hc v chun b giy, bt ch, ty thc hnhVI. T nh gi v rt kinh nghim bi ging:......................................................................................................................................................................................................................................................................


Bi 29: Thc hnh

LP T MNG IN CHO MT PHNG I. Mc tiu.a. V kin thc

- Hiu c quy trnh lp t mng in trong nh- Lp t c mng in n gin cho 1 phng theo thit k ng quy

trnh v yu cu k thutb. V ki nng

Lp t c mng in cho phng c. Thi

Lm vic nghim tc, khoa hc m bo an ton lao ngII. Chun b.- Bng in, cu ch, cng tc, dy dn in, giy nhp, bng dnh cch in,

bng n- Km ct dy, km tut dy, dao nh, tua vt, bt th in, khoan in cm tay,

mi khoan 2, 5mmIII. Qa trnh thc hin bi ging

TT Ngy lnlp

Tilp

Vng mtCLD

Vng mt KLD Ghi ch

1. n nh lp: 102. Kim tra bi c: 5C u ho: Em hy nu trnh t tnh ton, thit mng in cho 1 phng ?3. Ni dung bi ging: 345

...Nguyn c Hng98


99/109

Gio n: in dn dng 105 titHot ng ca thy v tr Tg Ni dung

Hot ng 1: Kim tra s chunca cc nhm- Nhm trng bo co s chun bca nhm

Hot ng 2: Tm hiu cc bcxy dng s lp t;GV: Treo s 29.1 v gii thchCu hi: xy dng s lp tcn thc hin cc bc g?- HS trnh by cc bcGV: gii thch cc bcHot ng 3: XD s lp tmng in:GV: hng dn HS v s lp tcho bi tp trang 133 bi 28HS: v s lp tGV: gim st v un nn thao tcsaiHot ng 4: Lp bng d trvt liu, thit b in v la chndng cGV: - Khi lp bng d tr vt liu,

thit b ta cn ch nhng yu tno?- hng dn HS cch lp d trHS: da trn s lp t lp dtr vt liu, tb, v la chn dngc vo bng (mu nh SGK)Hot ng 5: Tm hiu qui trnhlp t mng in:GV: Nu cc qui trnh lp t mng

in?HS: NC SGK v tr li 6 bcHS: Nc SGK cc vic phi lm chotng bcGV: Gii thch cc cng vic philm cho tng bcHot ng 6: Thc hnh bc 1-GV: hung dnHS: thc hnh

- GV quan st v kp thi un nnnhng thao tc sai

5

10

20

15

15

45

I. Chun bII. Quy trnh thc hnh1. Xy dng s lp t mngin

Cn thc hin cc bc sau:- nghin cu bn v thit k mngin cho phng trong bi hctrc- tm hiu s nguyn l mngin- v s mt bng b tr mngin trong phng2. Lp bng d tr vt liu, thitb in v la chn dng c

3. Quy trnh lp t mng in+ Bc 1: Vch du- vch du v tr lp t cc thit bin- vch du ng i dy+ Bc 2: Khoan l- khoan l bt vt lp t ngdy in

- khoan l bng in+ Bc 3: Lp t dy dn- lp t ng lun dy- lp t bng inlp t ng dy trc chnh+ Bc 4: Ni dy cac thit b inv n- Ni dy vo cc TB in: cm,cng tc...

- ni dy cc b n- ni dy qut trn..+ Bc 5: Hon thin lp t mngin- hon thin ni dy trong cc hpni- hon thin ni dy cc mch inn qut- hon thin ni dy cc mch in

cm+ Bc 6: Kim tra vn hnh th- kim tra khi cha ni ngun:

...Nguyn c Hng99


100/109

Gio n: in dn dng 105 titHot ng 7: Thc hnh bc 2-GV: hung dnHS: thc hnh- GV quan st v kp thi un nnnhng thao tc sai

Hot ng 8: Thc hnh bc 3-GV: hung dnHS: thc hnh- GV quan st v kp thi un nnnhng thao tc sai




Hot ng 12: Tng kt nh gi- GV: nhn xt, tng kt bi thchnh : kt qu thc hnh, qui trnh

tin hnh, thi gian hon thnh vthi tham gia thc hnh ca ccnhm- GV hng dn HS t nh githeo cc tiu ch- Yu cu cc nhm np bo cothc hnh

45

45

45

45

45

10

Lp t ng theo s Cc mi niMch in ng- Kim tra khi ni mch in vongun in v cho hot ng th

Cc thit b hot ng ng yu cuMng in hot ng tt

III. nh gi kt qu1. Cng vic chun b2. Thc hin thc hnh theo ngqui nh3. Thi : thc thc hin an tonlao ng, thc thc hin gi gn

v sinh mi trng4. Kt qu thc hnh

IV. Tng kt bi ging: 5

Tng kt bi thc hnh v gii p thc mcV. Cu hi , bi tp v hng dn t hc:- Em hy nu trnh t tnh ton, thit mng in cho 1 phng ?

...Nguyn c Hng100


101/109

Gio n: in dn dng 105 tit- V nh xem li ni dung bi hc v chun b bi tip theoVI. T nh gi v rt kinh nghim bi ging:


Bi 30: BO DNG MNG IN TRONG NHI. Mc tiu.

a. V kin thc- Hiu c cc nguyn nhn h hng v cc cng vic bo dng mng in

trong nh- Bit nguyn nhn h hng v bo dng dy in, cp in, t in,

aptomat, cu dao, cu chb. V ki nng

- Bit nguyn nhn v sa cha nhng h hng trong mng inc. Thi Lm vic nghim tc, khoa hc m bo an ton lao ng

II. Chun b.GV: Mt s kh c in lm trc quanIII. Qa trnh thc hin bi ging

TT Ngy lnlp

Tilp

Vng mtCLD

Vng mtKLD

Ghi ch

1. n nh lp: 22. Kim tra bi c: 3

- Em hy nu trnh t tnh ton, thit mng in cho 1 phng ?3. Ni dung bi ging: 80

Hot ng ca gio vin Tg Ni dungHot ng 1: Tm hiu nguynnhn h hng ca mng inv bin php khc phcGv: Hy cho bit mng inthng gp h hng g?HS: nu cc h hngGv: nhn xtGV: Nu cc nguyn nhn hhng ca mng in ?

Nu bin php bo dng sa

20 I. Nguyn nhn h hng ca mngin v bin php khc phcCc bc phn tch tin hnh bodng nh sau:+ D on s b nguyn nhn gy rah hng- nguyn nhn ch quan: do vn hnh,thao tc khng ng qui trnh..- nguyn nhn khch quan: do li sn

phm, nh cung cp...Nguyn c Hng101


102/109

Gio n: in dn dng 105 titcha?HS: Tr li nhng cu hiGV: khi qut v ging gii liHS: ghi li ni dung cn thit

Hot ng 2: Tm hiu nguynnhn h hng, bo dng dyin v cp:GV: Nu nguyn nhn h hngca day in v cp?Hs: xem SGK v tr liGV: Ging gii cc nguynnhn h hngHS: Ghi li ni dung cn thitHot ng 3: Bo dng tin:GV: - nu ln cch pht hin cc

hin tng bt thng khi lmvic v quan st cc v tr c

bit hay h hng ca t in, xtnh hng ca nhit cao vmi trng m gy nn h hngvt liu cch in- nu ln ni dung bo dng llm v sinh, nng cp cch in,gia c cc chi tit c kh v v

hoc thay th

Gv: Em hy nu cch bodng dy in v cp?HS: ngcu SGK v tr liGV khi qut ni dung chnh

Hot ng 3: Tm hiu nguynnhn h hng v bo dng

cc thit b ng ctGv: cho hs quan st 1s kh cnh cu ch ,cu dao v hi:

15

20

25

+ Tin hnh bo dng v sa cha- nu h hng do vn hnh cn bodng sa cha- nu do thit k, yu t mi trngcn hiu chnh li hoc thay th

- nu do li Sp cn tip xc vi hngcung cp x ng/nhn v tm BPKPII. Nguyn nhn h hng, bo dngdy in v cp1. Nguyn nhn h hng dy in vcp- H hng c hc- n mn v cp- m xm nhp vo cch in- Pht nng ca dy in v cp- nh thng v in2. Bo dng dy in v cp- Quan st dy in v cp bng mtkhi ang vn hnh- Kim tra cp treo trn khng- sau khi ktra pht hin tm BPKP:nng cp cch in, gia c v cp, hocthay th

III. Nguyn nhn h hng v bodng cc thit b ng ct

Nguyn nhn h hng c th do va p,lp rp, do nng lnh t ngt ca mitrng1. Bo dng t in- vi thit b ang vn hnh lng ngheting ng rung pht hin cchin tng bt thng v dng mt

quan st.- vi thit b khng c in: quan stcch in, kim tra c vt, lm schcch in..- xem xt nhng ch c bit:- cc ch c kh nng rn nt2. ptmt, cu dao:- lm v sinh bn ngoi- quan st ph/hin ch hng hc

- kim tra u ni- th ng ct kim tra c cu truynng

...Nguyn c Hng102


103/109

Gio n: in dn dng 105 titNu cc h hng thng gp cc kh c ng ct ny?

- Hy cho bit nguyn nhn hhng cc thit b ny?

- Cch bo dng tng loi thitb mt?- GV h thng li ni dungchnh

- ktra cc chi tit cch in, b mtphng in- ktra R tip xc cu tip im3. Cu ch:- ct in trc khi tho

- ktra tip im- lm sch v- cch in

IV. Tng kt bi ging: 5Tng kt bi v nhn xt theo cc tiu ch nu trong SGkV. Cu hi , bi tp v hng dn t hc:- Nu cc cng vic bo dng dy in v cp? Nu cc cng vic bo dng tin?- Nu cc cng vic bo dng cu dao, aptomat? Nu cc cng vic bo dngcu ch?- V nh xem li bi v chun b bi tip theo: tm hiu v ngh in v cc c so to nghVI. T nh gi v rt kinh nghim bi ging:.................................................................................................................................................................................................................................................................................................................................................................


Bi 31: TM HIU THNG TIN NGHV C S O TO


- Tm kim c mt s thng tin c bn ca ngh in dn dng

- Bit mt s c s o to ngh in dn dngb. V ki nng- Tm hiu c thng tin ngh cn thit

c. Thi C thc tm hiu ngh v nh hng ngh nghip cho tng lai

II. Chun b.GV:- nghin cu ti liu, sch tham kho c kin thc cn thit v thng tin

ngh in dn dng- hng dn HS tm hiu thng tin c th v ngh in- chun b 1 s bi ht, tr chi v ti ngh nghipHS:

...Nguyn c Hng103


104/109

Gio n: in dn dng 105 tit- iu tra thng tin theo bn m t ngh do GV giao- chun b t chc cc hot ng cn thit cho bui hc- chun b 1 s bi th bi ht v ti ngh nghip

III. Qa trnh thc hin bi ging1. n nh lp: 2

2. Kim tra bi c: 3Cu hi: Nu cc cng vic bo dng cu ch?3. Ni dung bi ging:

Hot ng ca thy v tr Ni dungHot ng 1: Tm hiu v tr tmquan trng ca ngh in dndng trong x hiGV t vn : nu khng c ngith in s xy ra kh khn g chocuc sng v s pht trin KTXH- Em hy nu c im ca nghin dn dng?- Ngh in c nhng yu cu g ivi ngi lao ng?

- Hs lm vic theo nhm v v trnhim v ca ngh in trong XH- Cc nhm bo co kt qu

- GV: kt lunHot ng 2: Tm hiu thng tinmt chuyn mn ca ngh indn dng:-GV yu cu tng nhm bo co ktqu iu tra thng tin ca 1 chuynmn d c GV giao cho t bitrc trn mt t kh giy to v dnln tng

HS: - cc nhm i xem ni dungthng tin ca nhm khc ghi chp

b sung- tng nhm cho kin b sung- GV kt lun v c th gii thiu ccngun thng tin cho nhng Hs muntm hiu su thm v ngh: sch, bo,mng....GV:

- Em hy nu c im ca nghin dn dng?- Ngh in c nhng yu cu g i

I. Tm hiu thng tin ngh v cs o to1. Mt s ngun thng tin nghnghip v c s o to* HS c th tm thng tin quanhng ngun sau:- Qua sch bo- Tm thng tin tuyn sinh- Qua mng Internet- Qua t vn ti cc trung tm- Qua cha, m v ngi thn- Qua thc tin x hi v cc buigiao lu2. Phng php thng tin

II. Bn m t ngh in dndng1. c im ca ngh in dndnga) i tng lao ng

b) Cng c lao ngc) Ni dung lao ngd) iu kin lao ng v nhngchng ch nh y hc ca ngh

2. Yu cu ca ngh i vingi lao ng:- Tri thc- k nng- sc kho3. Gii thiu cc c s o to viu kin tuyn sinh

Phiu iu tra thng tin

TT

Thng tin cntm

NDtm

...Nguyn c Hng104


105/109

Gio n: in dn dng 105 titvi ngi lao ng?HS: c SGK v tho lun theonhmGV: Nu iu kin lm vic cangh in, nhng kh khn v nhng

iu hp dn ca ngh GV: t chc ht, c th v ch ngh nghipHS: Tham giaHot ng 3: Tm hiu thng tin vc s o to ngh in dn dngGv: Gii thiu cho Hs cc hnh thco to ngh( TC, C, H..) v cck tuyn sinh, gii thiu 1 s c so to ngh trong v ngoi tnhGV: pht cho mi nhm 1 phiu iutra v c s o to nghHS: tm hiu v ghi phiuHot ng 4: Lin h bn thn vtng kt nh gi bi hc-HS: Lin h bn thn xem c yuthch v ph hp vi ngh inkhng?- GV: Tng kt v nhn xt tinh thn

thi ca lp trong bui hc

ucTn trng, aim

Nhng khoahoc chuyn

nghnhSL tuyn sinhYC tuyn sinhHc ph, hc

bngk n

IV. Tng kt bi ging: 10Mi HS vit thu hoch theo 1 trong nhng ni dung sau:- Bn m t 1 chuyn mn ca ngh in- Thng tin tuyn sinh ca 1 trng TC, C, hV. Cu hi , bi tp v hng dn t hc:- V nh xem li bi v chun b bi tip theo: tm hiu v th trng lao ng cangh in

VI. T nh gi v rt kinh nghim bi ging:

GIO N S: 33S tit: 3(t tit 100 n 102)

Bi 32: TM HIU THNG TIN TH TRNG

LAO NGI. Mc tiu.

a. V kin thc

...Nguyn c Hng105


106/109

Gio n: in dn dng 105 tit- Bit c khi nim, cc yu cu v nguyn nhn bin ng ca th trng

lao ng- Tm kim c mt s thng tin c bn v th trn

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Giao an Dien Dan Dung 105 Tiet