Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-06-27
2006-06-27
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S523000
Reexamination Certificate
active
07068062
ABSTRACT:
In a direct current motor drive bridge circuit structured such that a pair of forward rotation switching elements and a pair of reverse rotation switching elements are alternately connected annularly, a direct-current motor is interposed between diagonal node points on one side, and a power source voltage is applied to a portion between diagonal node points on another side via an existing resistance. A fault detection apparatus of the direct-current motor drive bridge circuit is provided with a fault detection circuit for detecting an electric potential of the one node point r to which the power source voltage is applied via the existing resistance and for detecting a closed-circuit fault of the switching elements and on the basis of a fluctuation of the electric potential.
REFERENCES:
patent: 5329238 (1994-07-01), Hofsass et al.
patent: 5532562 (1996-07-01), Yasuda
patent: 5602735 (1997-02-01), Wada
patent: 5659472 (1997-08-01), Nishino et al.
patent: 6094021 (2000-07-01), Noro et al.
patent: 04317861 (1992-11-01), None
patent: 0919450 (1999-06-01), None
patent: 3020038 (2000-03-01), None
Kasuga Takahiro
Kitagawa Susumu
Narasaki Takuya
Negishi Yutaka
Kramskaya Marina
Nguyen Vincent Q.
Orum & Roth LLC
Showa Corporation
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