Ground-fault detection system for vehicles with a...

Details Ground-fault detection system for vehicles with a... Ground-fault detection system for vehicles with a...

2008-05-08

2010-12-14

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

In vehicle wiring

C324S557000, C324S522000

Reexamination Certificate

active

07852089

ABSTRACT:
A ground-fault detection system and method for detecting loss of electrical isolation in a vehicle or other system that uses a high voltage (HV) power net. The loss of electrical isolation may be determined by charging HV capacitors, then connecting them at different times between the power-net HV wires and the ground (or vehicle chassis), and measuring their remaining charge after a fixed period. The HV system can be regarded as properly isolated from ground or not as a function of the energy lost by the aforementioned capacitors during their connection to the HV power net.

REFERENCES:
patent: 7005860 (2006-02-01), Yamamoto et al.
patent: 7554333 (2009-06-01), Morita
patent: 7560935 (2009-07-01), Morimoto

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