Fault detection system

Details Fault detection system Fault detection system

2006-05-16

2006-05-16

Hofsass, Jeffery (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S584000, C340S589000, C340S598000, C361S092000, C361S094000, C361S100000, C361S103000, C257S177000, C257S178000, C257S226000, C257S293000, C257S712000, C257S717000, C257S723000

Reexamination Certificate

active

07046155

ABSTRACT:
A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to monitor a temperature rise rate. It is judged that an abnormal condition has occurred if the thermal resistance is increased by the deterioration of a soldering layer of the semiconductor module or by drive circuit malfunctions and, as a result, the relation between an operation mode and the temperature rise rate falls outside a predetermined range.

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patent: 7-14948 (1995-01-01), None
patent: 8-126337 (1996-05-01), None

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