Motor drive circuit with reverse-battery protection

Details Motor drive circuit with reverse-battery protection Motor drive circuit with reverse-battery protection

1989-09-13

1991-04-30

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

320 25, 323351, H02H 318, H02J 700

Patent

active

050123815

ABSTRACT:
A relay-less drive circuit for an inductive load preferably uses a transistor switch to couple the load to a battery, and provides a path for recirculating current around the load, which path includes a recirculating diode coupled in series with another transistor switch, such as an FET. the FET's drain and source terminals are connected to the recirculating diode, and the FET is biased, such that the FET is on when the battery is connected to the load with its nominal polarity, and the FET is off when the polarity of the battery is reversed.

REFERENCES:
patent: 4323845 (1982-04-01), Leach
patent: 4423456 (1983-12-01), Zaidenweber
patent: 4679112 (1987-07-01), Craig
IBM Corp., IBM Technical Disclosure Bulletin, vol. 29, No. 2, Jul. 1986, pp. 567-569.

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