Leakage detection device of vehicle mounted power supply system

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 contactor is turned off, all IGBT elements (switching elements) in an IGBT inverter circuit are turned on, and an AC sign...

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Main Author Endou, Takayoshi
Format Patent
LanguageEnglish
Published 23.08.2011
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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 contactor is turned off, all IGBT elements (switching elements) in an IGBT inverter circuit are 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.
AbstractList 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 contactor is turned off, all IGBT elements (switching elements) in an IGBT inverter circuit are 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.
Author Endou, Takayoshi
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References (7-241002) 19950900
(2002-209331) 20020700
Endou (2009/0121672) 20090500
(8-70503) 19960300
(2000-13902) 20000100
Japanese Patent Office Refusing Reason Notice (with English translation) issued Feb. 9, 2010 in corresponding Japanese Patent Application No. 2007-524655.
(2003-219551) 20030700
(2000-013902) 20000100
Suzuki (2002/0121902) 20020900
International Search Report issued Aug. 22, 2006 in the International (PCT) Application of which the present application is the U.S. National Stage.
(2003-223841) 20030800
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Snippet 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....
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Title Leakage detection device of vehicle mounted power supply system
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