Leakage detection device of vehicle mounted power supply system

Details Leakage detection device of vehicle mounted power supply system Leakage detection device of vehicle mounted power supply system

2011-08-23

2011-08-23

Muralidar, Richard V (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C320S127000, C361S042000, C361S086000, C702S058000, C702S059000, C702S064000, C324S503000

Reexamination Certificate

active

08004285

ABSTRACT:
A leakage detection can be correctly performed both in a DC high voltage circuit and in an AC high voltage circuit in a vehicle-mounted power supply system. Under a state where a contactor17is turned off, all IGBT elements (switching elements)76in an IGBT inverter circuit12are turned on, and an AC signal Vs is applied to an applying point P. Then, a voltage measured at a voltage measurement point Q is compared with a threshold value to detect whether or not the leakage exists.

REFERENCES:
patent: 2002/0121902 (2002-09-01), Suzuki
patent: 2009/0121672 (2009-05-01), Endou
patent: 7-241002 (1995-09-01), None
patent: 8-70503 (1996-03-01), None
patent: 2000-13902 (2000-01-01), None
patent: 2000-013902 (2000-01-01), None
patent: 2002-209331 (2002-07-01), None
patent: 2003-219551 (2003-07-01), None
patent: 2003-223841 (2003-08-01), None
International Search Report issued Aug. 22, 2006 in the International (PCT) Application of which the present application is the U.S. National Stage.
Japanese Patent Office Refusing Reason Notice (with English translation) issued Feb. 9, 2010 in corresponding Japanese Patent Application No. 2007-524655.

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