Motor drive circuit

Details Motor drive circuit Motor drive circuit

1993-09-08

1995-09-19

Shoop, Jr., William M.

Electricity: motive power systems

Motor-reversing

318254, 318439, H02P 700

Patent

active

054518482

ABSTRACT:
A motor drive circuit in which a first bipolar transistor is disposed between a ground terminal and one terminal of a motor, and a second bipolar transistor is disposed between the ground terminal and another terminal of the motor. Each of the transistors has a reverse breakdown voltage between an emitter and a collector which is greater than a voltage of a power source and has a reverse-direction h.sub.fe which is greater than or equal to a predetermined value. A resistor and a capacitor are disposed in parallel between respective bases of the first and second bipolar transistors and a ground terminal. Potential drawbacks can be prevented even when voltage of reverse polarity is supplied.

REFERENCES:
patent: 4438378 (1984-03-01), Tanaka
patent: 4476416 (1984-10-01), Licata et al.
patent: 4649326 (1987-03-01), Mansman et al.
patent: 5210475 (1993-05-01), Juzswik et al.
patent: 5287046 (1994-02-01), Carpenter et al.

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