Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Patent
1997-08-29
1999-11-23
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
327432, 327482, 361 90, H03K 1772
Patent
active
059907240
ABSTRACT:
In a method and apparatus used for detecting and handling a short circuit in a circuit having a plurality of power semiconductors connected in series the voltage is divided across the electrodes and each power semiconductor and the magnitude of a small proportion of the voltage is measured. The magnitude of the voltage is compared to a reference voltage at least from when the power semiconductor is turned on. The reference voltage is higher than the maximum voltage across the power semiconductor during normal operation. A short circuit is detected when the magnitude of the measured voltage exceeds the reference voltage.
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Patent Abstracts of Japan, volume 9, No. 143, ED-322, 1985, Abstract of JP 60-26460 A (Hitachi Seisakusho K.K.), 1985.
Patent Abstracts of Japan, volume 9, No. 131, E-319, 1985, Abstract of JP-60-16171 A (Hitachi Seisakusho K.K.), 1985.
Bijlenga Bo
Lundberg Peter
Asea Brown Boveri AB
Nguyen Minh
Wells Kenneth B.
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