Dispozitive Multijonctiune

8/17/2019 Dispozitive Multijonctiune

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6. DISPOZITIVE MULTIJONCŢIUNE

6.1.

DIODA SHOCKLEY

6.1.1

STUCTURĂ ŞI SIMBOL

6.1.2 FUNCŢIONARE DIODEI SHOCKLEY

6.2 TIRISTORUL 6.2.1 STRUCTURĂ ŞI SIMBOL

6.2.2 IDENTIFICAREA TERMINALELOR 6.2.3 VERIFICAREA TIRISTORULUI NCIRCUIT 6.2.! FUNCŢIONAREA TIRISTORULUI

6.3 DIACUL ŞI TRIACUL 6.3.1 DIACUL 6.3.2 TRIACUL


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6.1.2 FUNCŢIONAREA DIODEI SHOCKLEYC?,+ $",#*),"% +*,$" %,+ * '%$+ "#$" -7*$*/(+*+"&" D1 * D3 #),$ -&%*7%$" +*"'$ *,$( >,',+)'5*" * $%$" $",#*),"% +*,$" %,+ * '%$+ #"

%-&*'( +*+"* D2 '%" "#$" -&%*7%$( *,/"#.Dioda este blocată şi se comportă ca un contact deschis.C?,+ $",#*),"% +*,$" %,+ * '%$+ +"-("$" /%&%"%$",#*),** +" #$(-),8"" % +*+"* D2 @,)0*$( * tensiunedirectă de întoarcere – V

BR

+*+% D2 *,$( >, ',+)'5*"*,/"#( *% -*, +*+% S9':&"; '*')&( ')",$. Diodaeste în conducţie şi se comportă ca un contact închis.

D%'( +)-( %0#%"% +*+"*S9':&"; $",#*),"% &% ,"&"+*+"* #'%+" #) /%&%"%$",#*),** +*"'$" +" >,$%'""')",$)& -*, +*+( ,) +*#-%" "&


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6.2.

TIRISTORUL6.2.1 STRUCTURĂ ŞI SIMBOL!iristorul "#$" %&'($)*$ +*, -%$) #$%$)* #)''"#*/"

#"0*',+)'$%" PNPN $"* 4,'5*),* PN * "#$"-"/(7)$( ') $"* $"0*,%&" anod ',"'$%$ &% -*0%"8*)," +" $*- P catod ',"'$%$ &% )&$*0% "8*)," +" $*-N * poartă sau "rilă ',"'$%$ &% % +)% "8*)," +" $*- P.S$)'$)% $**#$)&)* -%$" < "-"7",$%$( -*,$),'*')*$ "'9*/%&",$ =0%$ +*, +)( $%,7*#$%" -,- *,-, ',"'$%$" '% >,


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6.2.2 IDENTIFICAREA TERMINALELORTIRISTORULUI

C C%$+ A A,+ P P%$( #%) *&(

a. După #orma capsulei

NOTARETIRISTOR


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,$" 8*&( @ * '%$+ @K "7*#$",5% "&"'$*'(*,+*'%$( +" %-%%$ >,$), #",# "#$" 0*'( * >,'"&(&%&$ #",# "#$" 0%".

L% ),"&" $**#$%" '%" %) "7*#$",5( *,$",(>,$" 8*&( * '%$+ 0)&$*$"#$")& /% *,+*'% >,%0"&" #",#)* "7*#$",5( '?,+ "#$" ',"'$%$ >,$" * K.

b. Identi$carea terminalelor tiristorului cu multitesterul

Identi$c "rila %&'C,"'$"7 $%#$"&" 90"$)&)* >,$"

2 $"0*,%&" %&" $**#$)&)* >,#",#)& >, '%" re(istenţa electricăeste mică., %'"%#$( #*$)%5*" $"0*,%&)& -"'%" "#$" tasta ) % %-%%$)&)*"#$" "rila & *% $"0*,%&)& -" '%""#$" tasta – % %-%%$)&)* "#$"catodul * .


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6.2.3 VERIFICAREA TIRISTORULUI N CIRCUITP",$) /"*,$), '*')*$ "&"'$*' )$*&*7?,+ #'9"0% +*, ,'9*+" >,$")-($)& K *% &%0-% H ,) &)0*,"%7(+"%"'" $**#$)& "#$" &'%$.S" %-&*'( ), *0-) -7*$*/ -" 8*&% $**#$)&)* -*, %'$*/%"%)$,)&)* B 00",$ >, '%" $**#$)& *,$( >, ',+)'5*" *&%0-% H &)0*,"%7(.

L% +"7%'$*/%"% )$,)&)* B $**#$)& (0?," >, ',+)'5*" *&%0-% ',$*,)( #( &)0*,"7".P",$) &'%"% $**#$)&)* #" +"#'9*+" >,$")-($)& K.


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6.2.! FUNCŢIONAREA TIRISTORULUI


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C?,+ ')",$)& * $",#*),"% &% 8*&% $**#$)&)* "#$" 7"$**#$)& "#$" &'%$. P*, "& ,) '*')&( ')",$ * #"'0-$( '% ), >,$")-($ +"#'9*#.

D%'( -" -%$( #" %-&*'( ), *0-) -7*$*/ +" $",#*),"')",$)& +*, 8*&% $**#$)&)* +"#'9*+" $%,7*#$)& T2 *%-*, '&"'$)& $%,7*#$)&)* T2 '*')&( ')",$)& IB2.A'"#$ ')",$ +"#'9*+" $%,7*#$)& T1 *% -*, '&"'$)&

$%,7*#$)&)* T1 '*')&( ')",$)& IB1C)",$)& +" '&"'$ %& $%,7*#$)&)* T1 #)-&*0",$"%7(')",$)& +" %7( %& $%,7*#$)&)* T2 >, %% ="& >,'?$%'"#$ $%,7*#$ #( (0?,( >, ',+)'5*" * +)-(+*#-%*5*% *0-))&)* +" %0#%" +*, 8*&% $**#$)&)*.

S" =0"%7( )'&( >, '%" $%,7*#$)& T1 #)#5*,"=),'5*,%"% $%,7*#$)&)* T2 *% $%,7*#$)& T2#)#5*," =),'5*,%"% $%,7*#$)&)* T1 * +)-( +*#-%*5*%*0-))&)* +" %0#%" +*, 8*&% $**#$)&)*.

D)-( %0#%" -*, $**#$ '*')&( ')",$ * #"


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6.3.

DIACUL ŞI TRIACUL6.3.1 DIACULDiacul "#$" =0%$ +*, '*,'* #$%$)* #)''"#*/"#"0*',+)'$%" NPNPN * "#$" -"/(7)$ ') +)($"0*,%&" ANOD 1 @A1 ',"'$%$ &% -*0% "8*)," +" $*-N * ANOD 2 @A2 ',"'$%$ &% )&$*0% "8*)," +" $*- N.D*%')& "#$" =0%$ +*, +)( $**#$%" ',"'$%$" >,-%%&"& >, #",#)* -)#".


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FUNCŢIONAREA DIACULUI

1. C?,+ A1 "#$" 0%* -7*$*/ +"'?$ A2 *% $",#*),"%

+*,$" A1 * A2 "#$" 0%* 0%" +"'?$ $",#*),"% +"%0#%" @>,$%'"" VB +*%')& %0#"%7( * ',+)'"+" &% A1 #-" A2 @>, %'"#$ '%7 ',+)' $%,7*#$%"&" T1* T22. C?,+ A2 "#$" 0%* -7*$*/ +"'?$ A1 *% $",#*),"%+*,$" A2 * A1 "#$" 0%* 0%" +"'?$ $",#*),"% +"

%0#%" @>,$%'"" VB +*%')& %0#"%7( * ',+)'"+" &% A2 #-" A1 @>, %'"#$ '%7 ',+)' $%,7*#$%"&" T3* T!

D)-( %0#%" >, =),'5*" +" 0+)& +" -&%*7%"+*%')& ',+)'" >, %0"&" #",#)*.

D*%')& #" &'9"%7( '?,+ ')",$)& #'%+" #) /%&%"%0",5*,"" IH +!I,I-R/ DI0+,+I

D*%')& @+*+% +" ')",$ %&$",%$*/ "#$" )$*&*7%$ >, '*')*$" +" ')",$%&$",%$*/. F**,+ ), +*#-7*$*/ +"-)$"" 0*'( #" )$*&*7"%7( -",$)'0%,+% $**#$%"& * $*%'"&.

D"%"'" ',+)'" >, %0"&"#",#)* #" )$*&*7"%7( >, #-"'*%&


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6.3.2 TRIACULT*%')& "#$" ), +*%' ') ), $"0*,%& +" -%$(.T*%')& "#$" =0%$ +*, +)( $**#$%" ',"'$%$" >,-%%&"& >, #",#)* -)#" ') $"0*,%&)& +" -%$( '0),

S-" +"#"*" +" $**#$ $*%')& -%$" ',+)'" +)-(%0#%" >, %0"&" #",#)* >, =),'5*" +" 0+)& +"-&%*7%" % $"0*,%&"& A1 * A2.


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F),'5*,%"% $*%')&)*1. C?,+ A1 "#$" 0%* -7*$*/ +"'?$ A2 *% -" -%$% #"%-&*'( ), *0-) -7*$*/ $*%')& %0#"%7( * ',+)'" +"&% A1 #-" A2 @>, %'"#$ '%7 ',+)' $%,7*#$%"&" T1 *

T22. C?,+ A2 "#$" 0%* -7*$*/ +"'?$ A1 *% -" -%$% #"%-&*'( ), *0-) -7*$*/ $*%')& %0#"%7( * ',+)'" +"&% A2 #-" A1 @>, %'"#$ '%7 ',+)' $%,7*#$%"&" T! *T3 .C) 0)&$*$"#$")& #" 0(#%( "7*#$",5% >,$" A1 * .

, %0"&" #",#)* "7*#$",5% $")*" #(


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V"*, '*')*$

C?,+ '0)$%$)& K "#$" -" -7*5*% 1 V $")*" #( &)0*,"7"LED 1 * LED 3 @&"+)*&" **. *&% "#$" -7*$*/( =%5( +" A2* $*%')& ',+)'" +" &% A1 &% A2.C?,+ '0)$%$)& K "#$" -" -7*5*% 1 V $")*" #( &)0*,"7"


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Lecţiile de electronică se poate descărca de la adresa:

9$$-G"-=).$"9,*'&"'$**+*#'*-&*,"$"9,*'"Auxiliarele de electronică se pot descărca de la adresa:

9$$-G"-=)."&"'$,*'%

Adresa e-mail profesor electronică analogică:

',"&,80%*&.'0
http://eprofu.ro/tehnic/lectii-discipline-tehnice/http://eprofu.ro/tehnic/lectii-discipline-tehnice/http://eprofu.ro/electronica/http://eprofu.ro/electronica/http://eprofu.ro/tehnic/lectii-discipline-tehnice/http://eprofu.ro/tehnic/lectii-discipline-tehnice/

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