DocumentCode :
1564671
Title :
IGBT Fault Protection Based on di/dt Feedback Control
Author :
Huang, Frank ; Flett, Fred
Author_Institution :
Siemens VDO Electr. Drives Inc., Dearborn
fYear :
2007
Firstpage :
1478
Lastpage :
1484
Abstract :
Customer power modules built with the latest IGBT chips may be operated to their extreme conditions in terms of junction temperature, switching speed and voltage and current ratings. This is of particular advantageous in electric/hybrid vehicle applications where power density is a critical design factor. With IGBTs operated at extreme conditions the fault response time with a traditional IGBT fault protection approach, such as Vce sensing approach, may not be fast enough. This paper presents a circuit configuration to identify an IGBT fault current by means of measuring the induced voltage across the stray inductance between the IGBT Kelvin emitter and power emitter. Upon fault current detection a feedback control is introduced to dynamically control the di/dt of the fault current. Once the fault current is contained at a predetermined level, a slow turn off mechanism is deployed. The effectiveness of the proposed IGBT protection scheme was validated with customer power modules using Infineon 3rd generation IGBT chips rated at 600 V 1000 A for 100 kW electric drive systems used in fuel cell powered electric vehicles.
Keywords :
electric drives; fault current limiters; fault diagnosis; feedback; fuel cell vehicles; hybrid electric vehicles; insulated gate bipolar transistors; power semiconductor switches; IGBT fault protection; Kelvin emitter; current 1000 A; customer power modules; di/dt feedback control; electric drive systems; electric-hybrid vehicle; fault current detection; fuel cell powered electric vehicles; power 100 kW; power emitter; stray inductance; voltage 600 V; Circuit faults; Delay; Fault currents; Feedback control; Hybrid electric vehicles; Insulated gate bipolar transistors; Multichip modules; Protection; Temperature sensors; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
ISSN :
0275-9306
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
Type :
conf
DOI :
10.1109/PESC.2007.4342213
Filename :
4342213
Link To Document :
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