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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| Format | Patent |
| Language | English |
| Published |
23.08.2011
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| Online Access | Get full text |
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| Summary: | 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. |
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