Load drive control circuit

Details Load drive control circuit Load drive control circuit

2008-06-19

2010-06-22

Ip, Paul (Department: 2837)

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

C318S254100, C318S293000, C318S294000, C318S400290, C361S023000, C312S405100

Reexamination Certificate

active

07741794

ABSTRACT:
A load drive control circuit for controlling a load that includes connection terminals. The load drive control circuit includes bridge circuits respectively connected to the connection terminals of the load. Each bridge circuit includes two semiconductor elements, which are connected between a power supply and ground, and an output terminal. The semiconductor elements are each controlled to be switched between activated and deactivated states. The output terminal of each bridge circuit generates a bridge output that varies in accordance with a combination of the activated and deactivated states of the semiconductor elements in the bridge circuit. A detection circuit detects whether a short circuit is occurring in the connection terminals. A control circuit switches the bridge circuits to electrically disconnect the load from the power supply when a short circuit is occurring during a period in which the load is in a suspended state.

REFERENCES:
patent: 5631527 (1997-05-01), Canclini
patent: 5642247 (1997-06-01), Giordano
patent: 5818180 (1998-10-01), Canclini
patent: 6056384 (2000-05-01), Sato et al.
patent: 6864651 (2005-03-01), Lee et al.
patent: 6989643 (2006-01-01), Komaromi et al.
patent: 7408313 (2008-08-01), Kong et al.
patent: 2003/0151411 (2003-08-01), Tucker
patent: 2006-158162 (2006-06-01), None

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