Power supply cut-off device for a power rectifier

Details Power supply cut-off device for a power rectifier Power supply cut-off device for a power rectifier

2006-06-13

2006-06-13

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

Reexamination Certificate

active

07061733

ABSTRACT:
A power supply cut-off circuit for breaking a connection between a power rectifier and a power supply line leading to a load. The cut-off circuit is adapted to be connected between the power rectifier and the power supply line and includes a switching circuit connected to a control circuit. The control circuit is operable to sense a malfunction in the power rectifier and to use the switching circuit to disconnect the power rectifier from the power supply line. In one embodiment, the switching circuit includes a plurality of MOSFETs connected in parallel with one another and the control circuit disconnects the power rectifier from the power supply line by making the MOSFETs non-conducting when the power rectifier malfunctions and the output current of the power rectifier becomes inverted.

REFERENCES:
patent: 4532443 (1985-07-01), Glennon
patent: 5642251 (1997-06-01), Lebbolo et al.
patent: 5864476 (1999-01-01), Busch
patent: 6014322 (2000-01-01), Higashi et al.
patent: 6043965 (2000-03-01), Hazelton et al.
patent: 6381152 (2002-04-01), Takahashi et al.
patent: 1146620 (2001-10-01), None
Fusion Engineering and Design, 58-59 (2001) 63-67, “Application of parallel connected power-MOSFET elements to high current d.c. power supply”.

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