Apparatus for driving and controlling motor

Details Apparatus for driving and controlling motor Apparatus for driving and controlling motor

1993-12-21

1996-01-30

Martin, David S.

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

318469, 318282, 318286, 318641, 49 28, G05B 500

Patent

active

054882761

ABSTRACT:
An apparatus for driving and controlling a motor which moves a movable portion of a vehicle by driving force of the motor. The apparatus includes a drive stopping circuit for comparing a value of current detected by a current detection circuit, which detects drive current of the motor when the movable portion is being moved, with a predetermined comparison current value, and for stopping driving of the motor at a time when a detected current value exceeds the comparison current value. The apparatus also includes a comparison current varying circuit for varying the comparison current value based on a temperature of an environment of the movable portion. Since it is possible to carry out temperature compensation based on ordinary drive current and lock current of the motor, the comparison current value can be set within a wide range.

REFERENCES:
patent: 3936711 (1976-02-01), Gay
patent: 4550277 (1985-10-01), Carney
patent: 4779031 (1988-10-01), Arends
patent: 5038088 (1991-08-01), Arends
patent: 5351439 (1994-10-01), Takeda et al.

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