Fault detection method for detecting leakage paths between...

Details Fault detection method for detecting leakage paths between... Fault detection method for detecting leakage paths between...

2009-03-12

2011-10-18

Nguyen, Vincent Q (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of ground fault indication

C324S557000, C324S551000

Reexamination Certificate

active

08040139

ABSTRACT:
A method of detecting a ground fault condition between a direct current power system and the chassis ground of an electric or hybrid-electric vehicle is provided. The method includes sequentially opening and closing a first switch connected between a positive node of the direct current power system and the chassis ground of the vehicle and a second switch connected between a negative node of direct current power system and the chassis ground. The sequential opening and closing of the first and second switches charges and discharges an inherent capacitance present between the metal components of the direct current power system and the chassis. First and second currents are created as the inherent capacitance is charged and discharged. Measurements of the created first and second currents are then used to determine whether a ground fault condition exists between the direct current power system and the vehicle chassis ground.

REFERENCES:
patent: 3696367 (1972-10-01), Inamdar
patent: 3700966 (1972-10-01), Morrow
patent: 3754221 (1973-08-01), Stelter
patent: 3786466 (1974-01-01), Naito et al.
patent: 3801898 (1974-04-01), Young
patent: 3947759 (1976-03-01), Briggs
patent: 4002968 (1977-01-01), Reid
patent: 4151460 (1979-04-01), Seese et al.
patent: 4206398 (1980-06-01), Janning
patent: 4253056 (1981-02-01), Chaudhary
patent: 4417202 (1983-11-01), Pascoe
patent: 4472676 (1984-09-01), Eichmann et al.
patent: 4638245 (1987-01-01), MacPhee et al.
patent: 4679111 (1987-07-01), Koch et al.
patent: 4809123 (1989-02-01), Allington et al.
patent: 4896115 (1990-01-01), Lemaitre et al.
patent: 4929901 (1990-05-01), Kimball et al.
patent: 5101160 (1992-03-01), Barjonnet et al.
patent: 5146397 (1992-09-01), Fruhling
patent: 5382946 (1995-01-01), Gale
patent: 5481194 (1996-01-01), Schantz et al.
patent: 5508872 (1996-04-01), Khoo et al.
patent: 5510725 (1996-04-01), Schantz, Jr. et al.
patent: 5530360 (1996-06-01), Kerchaert et al.
patent: 5561380 (1996-10-01), Sway-Tin et al.
patent: 5686839 (1997-11-01), Takagi
patent: 5712572 (1998-01-01), Tamechika et al.
patent: 5760488 (1998-06-01), Sonntag
patent: 5811976 (1998-09-01), Fischer
patent: 5990685 (1999-11-01), Nightall
patent: 6084755 (2000-07-01), Roberts et al.
patent: 6320389 (2001-11-01), Tamesue et al.
patent: 6678132 (2004-01-01), Carruthers et al.
patent: 6794879 (2004-09-01), Lawson et al.
patent: 6833708 (2004-12-01), Furukawa
patent: 6856137 (2005-02-01), Roden et al.
patent: 6919726 (2005-07-01), Yudahira
patent: 6970807 (2005-11-01), Kito et al.
patent: 6998819 (2006-02-01), Jin
patent: 7026788 (2006-04-01), Yano et al.
patent: 7049825 (2006-05-01), Carruthers
patent: 7075311 (2006-07-01), Oshiro et al.
patent: 7102356 (2006-09-01), Wild
patent: 7560935 (2009-07-01), Morimoto
patent: 7629794 (2009-12-01), Kamata
patent: 2007/0285057 (2007-12-01), Yano
patent: 2009/0184718 (2009-07-01), Ivan et al.
patent: 2009/0228163 (2009-09-01), Tarchinski
patent: 2009/0278547 (2009-11-01), Acena et al.
European Search Report for European Patent Applicalion No. 10001540.3-1524 (counterpart application); Jul. 1, 2010; 4 pgs.

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