Semiconductor device protection method

Details Semiconductor device protection method Semiconductor device protection method

1997-01-03

1998-04-07

Tso, Edward

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 17, 363132, 363 98, H02H 7122

Patent

active

057372004

ABSTRACT:
Semiconductor devices operating as switching elements for a power converter are protected in the invention. Each pair has upper and lower arms and is connected in series between electrodes of a DC power supply. In the converter, the pairs of the semiconductor devices are switched to convert power from the DC power supply to obtain converted power from a connection between the semiconductor devices in each pair. In the method, magnitudes of drive signals or drive-circuit constants for the semiconductor devices of the upper and lower arms in each pair are set to be different from each other, and a protection device is provided in only one of the semiconductor devices in the pair of the upper and lower arms. The protection device monitors voltage between main terminals of the semiconductor device where the protection device is installed, and controls the drive signal for the semiconductor device to prevent passage of an excessive current therethrough.

REFERENCES:
patent: 5063488 (1991-11-01), Harada et al.
patent: 5198969 (1993-03-01), Redl et al.
patent: 5438498 (1995-08-01), Ingemi
Proceedings of 1990 International Symposium on Power Semiconductor Devices & ICs, Tokyo, pp. 144-149 "Super Mini Type Integrated Inverter Using Intelligent Power and Control Devices".
Abstracts (Fuji Electric Journal), vol. 63, No. 9, 1990, UDC Power Modules Using IGBTs for Inverters".

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