Leakage detector of vehicle-mounted power supply system and method

A leakage detector which can detect leakage correctly in both the DC high voltage circuit and the AC high voltage circuit of a vehicle-mounted power supply system. Under a state where a contactor (17) is turned off, all IGBT elements (switching elements) (76) of an IGBT inverter circuit (12) are tur...

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Bibliographic Details
Main Author ENDOU TAKAYOSHI
Format Patent
LanguageChinese
English
Published 16.05.2012
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Summary:A leakage detector which can detect leakage correctly in both the DC high voltage circuit and the AC high voltage circuit of a vehicle-mounted power supply system. Under a state where a contactor (17) is turned off, all IGBT elements (switching elements) (76) of an IGBT inverter circuit (12) are turned on and an AC signal VS is applied to an application point P. Leakage is detected by comparing the measured voltage at a voltage measuring point Q with a threshold.
Bibliography:Application Number: CN200680025396