Motor drive apparatus including braking means

Details Motor drive apparatus including braking means Motor drive apparatus including braking means

1997-01-02

1999-11-09

Martin, David

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318370, 318379, H02P 100

Patent

active

059821191

ABSTRACT:
A motor drive apparatus used in a motor for controlling a rotor therein to rotate in regular and reverse directions includes a rotating direction detecting circuit for detecting a first direction in which rotor is rotating. A comparator compares a command signal with a reference signal to detect a second direction in which the rotor should rotate. A motor driver comprised of buffer amplifiers and power supply circuits is provided to rotate the rotor based on the command signal. A command signal generator produces a drive signal which is transferred to the power supply circuits through a switch when the first and second directions are both identical to the reverse direction.

REFERENCES:
patent: 4549120 (1985-10-01), Banno et al.
patent: 4558265 (1985-12-01), Hayashida et al.
patent: 4678973 (1987-07-01), Elliott et al.
patent: 4695782 (1987-09-01), Jatnieks
patent: 4864211 (1989-09-01), Kawaguchi

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