Method and apparatus for detecting welding of a relay contact

Details Method and apparatus for detecting welding of a relay contact Method and apparatus for detecting welding of a relay contact

2008-05-06

2008-05-06

Deberadinis, Robert L. (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Reexamination Certificate

active

11237874

ABSTRACT:
A method for detecting a welding of a relay contact in a circuit having a DC power supply; a load circuit; a first main relay and a second main relay respectively inserted in a pair of power supply lines disposed between the DC power supply and the load circuit; and a precharge relay which is provided in parallel to the contact of the first main relay has the step of carrying out a sequence control to each of the relays (11, 12, 13) while measuring voltage across both ends of the load circuit (16) when shifting from a normal operation state in which a first main relay (11) and a second main relay (12) are controlled to be on and the precharge relay (13) is controlled to be off to a suspension state in which each of the relays (11, 12, 13) are controlled to be off. The welding of the relay contact of the first main relay (11) and the second main relay (12) is determined independently and separately from a correspondence between the proceeding of the sequence and the measured voltage.

REFERENCES:
patent: 5369540 (1994-11-01), Konrad et al.
patent: 6577024 (2003-06-01), Kikuta et al.
patent: 06-233401 (1994-08-01), None
patent: 2000-78851 (2000-03-01), None
patent: 2000-134707 (2000-05-01), None
patent: 2000-173428 (2000-06-01), None
patent: 2000-270561 (2000-09-01), None
patent: 2000-278802 (2000-10-01), None
patent: 2001-327001 (2001-11-01), None
patent: 2003-102101 (2003-04-01), None
patent: 2003-102102 (2003-04-01), None

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