Current Programed Control of a Bidirectional Full Bridge

8/20/2019 Current Programed Control of a Bidirectional Full Bridge

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CURRENT PROGRAMED

CONTROL OF A BIDIRECTIONALFULL BRIDGE DC-DC CONVERTER

SUBMITTEDBY ARVINDCHAUHAN


2/13

Abstract

Mode!"# o$ b!d!rect!o"a $% br!d#e DC-DCco"&erter as o"e o$ t'e (ost a))!cabe co"&erters'as rece!&ed s!#"!*- ca"t atte"t!o"+ Mat'e(at!ca(ode!"# red%ces t'e s!(%at!o" t!(e !"co()ar!so" ,!t' deta!ed c!rc%!t res)o"se(oreo&er !t !s co"&e"!e"t $or co"troer des!#")%r)ose+ D%e to s!()e a"d e.ect!&e

(et'odoo#/0 a&era#e state s)ace !s t'e (ostco((o" (et'od a(o"# t'e (ode!"# (et'ods+I" t'!s )a)er a b!d!rect!o"a $% br!d#e co"&erter !s(odeed


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Mode!"# o$ DC-DC co"&erter as o"e o$ t'e (osta))!- cabe !"d%str!a co"&erters 'as aro%sed a ot

o$ !"terest+ S!"ce (ode!"# #!&es %s !"$or(at!o"abo%t stat!c a"d d/"a(!c o$ t'e s/ste(0 !t !s acr%c!a $actor !" des!#" a"d co"tro+ Moreo&er0atta!"ed (at'e(at!ca (ode ca" re- d%ce t'e

s!(%at!o" t!(e !" co()ar!so" ,!t' t'e s!(%a-t!o"t!(e )ro&!ded b/ 1c/ce b/ c/ce2 so&!"# t'e d!$-$ere"t!a e3%at!o"s o$ t'e c!rc%!t0 as !s t'e case !"(atab4s!(%!"5+

I"trod%ct!o"


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Key words

A&era#e State S)aceB!d!rect!o"aDeta!ed C!rc%!t S!(%at!o" F% Br!d#e DC-DC

Co"&erterMat'e(at!ca Mode!"#


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Principle of

Operation


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Boost ModeOperationI" boost (ode ,!t' res)ect to )%se #at!"# s!#"as0t'ere are t,o (a!" !"ter&as0 co"s!st!"# o$ $o%rs,!tc'es o" a"d t,o d!a#o"a s,!tc'es o"+ 6'e" $o%rs,!tc'es t%r" o"0 !")%t !"d%ctor &ota#e !s e3%a to!")%t so%rce 7o, &ota#e s!de8 a"d t'e !"d%ctorc%rre"t !"crease )ro- )ort!o"a to t'e a))!ed &ota#e+

I" t'!s !"ter&a !"d%ctor sa&es t'e e"er#/ to tra"s$er !t!" t'e "e9t !"ter&a+ 6'!e at t'e '!#' &ota#e 7HV8s!de t'e oad !s $ed b/ t'e e"er#/ t'at 'as bee"tra"s$erred to t'e o%t)%t *ter 7C8 d%r!"# )er&!o%s

!"ter&a+Ne9t !"ter&a %s%a/ !s 5"o," as t'e e"er#/ tra"s$er!"ter&a+ For !"sta"ce0 ass%(e t'at S: a"d S; are o"a"d S< a"d S= are o.+ T'e !")%t &ota#e )%s !"d%ctor&ota#e !s a))!ed to tra"s$or(er a"d !s scaed b/ "$actor0 rat!o o$ seco"dar/ to )r!(ar/ &ota#e0 t'e" ,!


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8/13

Buck Mode

Operation

$or b%c5 (ode o)erat!o"0 a#a!" t'ere are t,o (a!"!"ter&as !" a 'a$ s,!tc'!"# c/ce0 *rst ,'e" d!a#o"as,!tc'es t%r" o"0 a"d seco"d o"e ,'e" a s,!tc'est%r" o.+ 6'e" d!a#o"a s,!tc'es are o"0 $or !"sta"ceS> a"d S?0 t'e )o,er !s tra"s$erred $ro( '!#' HV s!deto LV s!de+ I" t'!s !"ter&a t'e !"d%ctor c%rre"t

!"creases )ro)ort!o"a to t'e scaed HV s!de &ota#e(!- "%s o%t)%t 7"o(!"a LV8 &ota#e+6!t' t%r"!"# o. t'e s,!tc'es0 "e9t !"ter&a starts+ A-t'o%#' t'e e9!ste"ce o$ ea5a#e !"d%cta"ce )re&e"ts

t'e s,!tc'es #o o. !((ed!ate/ a$ter a))/!"# #atet%r" o. )%ses a"d co"d%ct!o" o$ s,!tc'es ,!co"t!"%e t'ro%#' )aras!t!c ca)ac!tors a"d d!odes0 b%t!t !s ass%(ed t'at t'ese s%b!"ter&as are &er/ s'orta"d ca" be "e#ected+ I" o. t!(e0 t'e seco"dar/ s!de!s o"/ $ed b/ t'e !"d%ctor stored e"er#/0 so t'e


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Small Signal Modeling UsingAverage State Space

E()o/!"# a&era#e state s)ace (et'od !sd!&!ded !"to t'ree )'ases@:8 6!t' res)ect to s,!tc' co"d!t!o"s0 t'e c!rc%!t!s d!- &!ded !"to d!.ere"t s%b!"ter&as a"d state

e3%at!o"s are ,r!tte" !" t'e (atr!9 $or( !" eac'!"ter&a+ State &ectors are de*"ed as !"d%ctorsc%rre"ts a"d ca)ac!tors &ota#es+


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For s!()!c!t/ o$ (ode!"# t'e $oo,!"#ass%()t!o"s ca" be e()o/ed@

:+S,!tc'es are !dea0 t'ere !s "o )aras!t!c e.ect !"s,!tc'es

I"d%ctor 'as "o res!sta"ce


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>+Eac' (ode 7b%c5 or boost(odes8 starts ,!t' ero !"!- t!aco"d!t!o"+ +State e3%at!o"s ,! be ,r!tte" !"

eac' (ode se)arate/ a"d ,!t'so(e (at'e(at!ca o)erat!o"s o"eca" der!&e "eeded tra"s$er

$%"ct!o"s+


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THAN YOU

Documents

Current Programed Control of a Bidirectional Full Bridge