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??>>ǰλãּ޹˾ > IGBT· >

IGBT±仯µĵŸ

ߣּ ʱ䣺2019-12-27 17:46

  IGBT¶ȱ仯˲IJҲ¶ȵı仯仯Ÿšĵȶ뿪ع̵˲䲨йءIGBTڿͨ͹ض̬̲ĸߵѹ͵仯ʼɴ˴ĵѹǵŸŵҪԴͨIGBT鹤еĵŸǿȿԶ¶ṩЧο˴оIGBTڲ뵼IJ¶ȱ仯Ļϣо˿عм缫ֵ仯ʣ伫ѹֵ仯¶ȵĹϵӶŸ¶ȵĹϵʵ飬ʵõIGBT±仯µĵŸԡ
 
2. ±仯Ÿŷ
2.1 IGBTĽṹ
  IGBTһ˹ʰ뵼и߹IGBT鳣õķװװװڲоƬĺӺͼӣܻܵϴ裬ϵ͵ĹܶȺͽϸߵĹʡͼ1Ϊ׼IGBTIJ״ṹ

IGBTIJ״ṹ 
ͼ1 IGBTIJ״ṹ
 
  ֽṹɼ㲻ͬIJɡ裨SiоƬմɻͭ壨DCBϣDCBĵ׽SiоƬװԵSiоƬĶA1߽Ӵͼ1ʾIGBTɾвͬϵCTEĸֲɡڹУҪȡIGBTͷܣFWDоƬĹԼɢ·迹IGBT¼㹫ʽΪ
㹫ʽ1 
ʽУPlossΪģTthΪ裻TcΪ¡
  IGBTİIGBTоƬFWDĹġIGBTЧʺͿٿصҪŸߵĹˮƽᵼ½ϴĿģʹIGBTоƬ¶ȲϴоƬɢϵ´ȴϵͳߺоƬ֮ϵƥᵼ¼䡣оƬ֮ͭͭCTEƥᵼºϲƣ͡
 
2.2 1ǣtع̵IJ
  IGBTĿعͼ2ʾ
IGBTĿع 
ͼ2 IGBTĿع
  ͼ2¶ȶԿع̵ľӰ죺t1~t2׶Σ伫ѹʼֵѹIGBTͨ缫ʼIGBT¶ȼΪУŨȺǨʵȶµı仯仯ݱŨȿͨʽй㣺
㹫ʽ2 
ʽУNcNvΪͼ۴Ч̬ܶȣKΪϵTΪ¶ȣWcΪSiĽȣ¶ȳɸء
  ʽ2֪¶ȵӵŨȽ͡ӰǨʵɢǵɢ;ɢ䡣ʱɢҪɢӵǨ¶Ⱦ¹ϵ
㹫ʽ3 
  ɼIGBTǨҲ¶ȵ߶ͣ¿ͨʱӳǵ缫仯¶߶ͺͻ·еɢУʽ4֪伫ĵѹҲ¶ƽ
㹫ʽ4  
  t2~t3׶ΣIGBTܹͨضϹУ¶ʱܻڲӸȵʱ󣬵´ӻȡĿԼ٣ܵķֵָIRMСͨ缫ΰܺIGBTĶ̬ԣֵɷܵķָγɡͬϽ׶һ£伫ѹ仯¶ȵ{С
  t3~t4׶Σָܻܵ𽥻ָ㣬伫ѹСڿͨʱӳù̼缫仯ʼС伯ѹ仯ҲС
  ʹ׷Dzÿͨвͬ¶¼缫ͼ伫ѹߣͼ3Aʾ
  T5~t8׶ΪIGBTĹضϹ̡tsʱ̣PWMźűΪ͵ƽʼضϱIGBT
  IGBTضʱҪĵڴ洢ĹʣӣγβֻʣĴ洢ɺáβҪƯеĹʣӵĸ˥أʣ¶ȱ仯ľ鹫ʽΪ
㹫ʽ5 
ʽУτ(to)ΪʣӳʼToΪʼ¶ȡ
  ɴ˿֪IGBTضϹУԽ{ʣӵԽӶ¹ضʱĵ½̱ûβʱԽãضʱӳһԭIGBTڲPNPܵĵ߶ɼ缫˥ܸߣӳ˹ضʱ䡣Ϸ֪ߣض˲̬缫仯ʱСIGBTضϹУ仯뻻·ɢеij˻ֱѹϲ缫ѹ塣
㹫ʽ6 
ʽ6֪IGBTµߣضʱĵѹСѹ仯ģΪ
㹫ʽ7 
  ʽ7,k1ɿѨɢϵk1Ѩɢϵ¶ȵСK2˫Ǩйأ¶ȵTana,βҲ뵼صIJ¶ȵ󡣺ľCdepuceK1ı仯ԣԵѹ仯ʵӰСɴ˿֪¶ߣضϹм伫ĵѹ仯ʼС
  ʹ׷Dzòͬ¶IGBTĹضߡ缫ͼ伫ѹ߼ͼ3b
IGBTͨ͹ض 
ͼ3 IGBTͨ͹ض
 
2.3 IGBT̬Ƶ
  IGBT̬ģͿ׼ȷعеĵѹ͵仯ʣģͼΪӡΪ򻯷ڸŷпɲõβƴIGBTĿ̡̬ǵIGBTع̵ʱ½ʱ䣬ٶͼ4ʾκƴIGBTĿ̬̣βƵװЧĵŸţͼ5
IGBTĿز 
ͼ4 IGBTĿز
Ƶ׵İ 
ͼ5 Ƶ׵İ
 
  θŵѹFFTչʽΪ
㹫ʽ8 
 
3. ʵ
  鴫Ųԭͼͼ6ʾ·ͼ7ʾIJƽ̨źŷصԴ·̡IGBT顢ŸŲԽջɵӸءLISNɱֱԴɡֱԴͨLISNIGBTṩԴIGBT顢USNŸŲԽջڸ1mIJϣIGBTUSNͨӵӵƽӡ⣬ƽ̨лм̣ڶIGBTļȡ
鴫Ųԭͼ 
ͼ6 鴫Ųԭͼ
ʵ·ԭͼ 
ͼ7 ʵ·ԭͼ
  ʵʹSKM300GB128DIGBTͼ7еĸ:UgɿصԴṩֵΪ15VUdcɿɱֱԴṩֵΪ10VRɿɵӸṩ뵽·PWMźŵռձΪ50%ƵΪ5kHz
  ͼ1ʾʵ·ͼ2ʾIJƽ̨ʵ顣ӸѡúģʽΪ˼СIGBTɵɱֱԴõĵΪ0.5Aü̶IGBTмȣ̼ȵ¶ȺȶһʱٴPWMʹIGBTIGBTĵŸš㣬icС£һοضܺIJԸı£ΪʱȡIGBTڲͬ¶£·вĵŸšIGBTΪ20棬60棬100棬120ʱ·вĵŸͼ8
Ÿ 
ͼ8 Ÿ
  ɼIGBTʱ¶Խߣ·вĵŸǿԽС
  Բͬ¶²õݽдͼ9
ͬ¶µĸǿ 
ͼ9 ͬ¶µĸǿ
 
  ͼ֪0.15~30MHzƵʷΧڣ¶ȵ{·еĵŸǿҲ֮СڵƵڵŸǿȼСΪƵڵǧǿ΢С
 
4.
  IGBT鲻ͬ¶µĵŸԣʵ֤õۣIGBT£¶ȵߣ·вĵŸǿȼСڹʵʵУʵʱIGBT¶ȽΪѣеŸŲʱݻ·еŸŵı仯IGBTĽ±仯Ӷʱϵͳ״̬ȴϵͳ¿ڰȫΧڣIGBTܼʱɢ¶߶ʧЧָIGBTĹӦþһ塣




һƪһIGBTýĸŵƷ
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