Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1997-02-28
2000-08-15
Sircus, Brian
Electricity: motive power systems
Switched reluctance motor commutation control
318439, 318138, 318139, 318801, 318434, 361 93, 361100, 361 31, 363109, 363131, H02K 2300
Patent
active
061041491
ABSTRACT:
A simple, off-chip circuit and method for endowing high efficiency IGBTs with short-circuit capability, that is essentially transparent to the user. The invention involves adding an external common emitter resistor to reduce the effective gain of an IGBT under short circuit. Under normal operating conditions, the voltage across the resistor is small, such that the modifying effect on the normal operating gate-emitter voltage is almost negligible.
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Z. John Shen and Steve P. Robb: "Design and Modeling of the 600V IGBT with Emitter Ballast Resistor" Power Conversion Electronics, Sep. 1995 Proceedings, pp. 54-61.
International Rectifier Corp.
Sircus Brian
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