DocumentCode :
1896407
Title :
An abnormal turn-off surge suppression concept for PT-IGBTs at high voltage operation
Author :
Hotta, Kazuhiro ; Fukami, Takeshi ; Hamada, Kimimori ; Sugiyama, Takahide ; Ishiko, Masayasu
Author_Institution :
Toyota Motor Corp., Japan
Volume :
1
fYear :
2004
fDate :
20-25 June 2004
Firstpage :
591
Abstract :
In this paper, we investigate the turn-off surge behavior of PT-IGBTs, and in particular, abnormal increases in surge voltage appearing at high voltage conditions, which are required for a hybrid vehicle with a more powerful motor output. Simulation and experimental results showed that the abnormal surge voltage can be suppressed by increase of an extra-carrier at the interface between the n-drift and n+buffer layers, because the abnormal phenomenon resulted from depletion of the accumulated carrier during the turn-off period. This countermeasure is achieved by designing the PT-IGBT as the increase of the extra-carrier at the interface during the turn-off period. This allows reduction of the surge voltage, and thereby makes it possible to use the device for higher voltage operation over 600 V, such as in hybrid vehicle application, and consequently, to increase the motor power of the hybrid vehicle without sacrificing reliability and cost.
Keywords :
hybrid electric vehicles; insulated gate bipolar transistors; power semiconductor switches; semiconductor device reliability; surge protection; 600 V; PT-IGBT; accumulated carrier; depletion layer; high voltage operation; hybrid vehicle; insulated gate bipolar transistors; n+buffer layers; n-drift layer; sacrificing reliability; surge voltage; turn-off surge suppression; Bipolar transistors; Conductivity; Costs; Energy dissipation; Insulated gate bipolar transistors; Inverters; Power electronics; Surges; Vehicles; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
ISSN :
0275-9306
Print_ISBN :
0-7803-8399-0
Type :
conf
DOI :
10.1109/PESC.2004.1355814
Filename :
1355814
Link To Document :
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