Motor drive circuit

Details Motor drive circuit Motor drive circuit

1990-08-15

1992-08-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361111, 361118, H02H 320

Patent

active

051424339

ABSTRACT:
A motor drive circuit comprises a motor, a DC source connected to said motor, first and second switching elements turned on and off to control a current flowing to the motor having one terminal connected to a common connecting point of the first and second switching elements, and when the current flowing to the motor is stopped by the first switching element, the second switching elements is turned on to break the motor, a reverse current bypassing circuit connected to at least one of said first switching element and said second switching element for bypassing a reverse current supplied by the DC source, a reverse current blocking circuit connected to said second switching element for blocking the reverse current and a surge absorbing circuit connected to at least one of the first switching element, the second switching element and a series circuit of the second switching element and the reverse current blocking circuit for absorbing a surge generated when the first switching element is turned off in response to a locking to the motor.

REFERENCES:
patent: 3668414 (1972-06-01), Norian et al.
patent: 4705997 (1987-11-01), Juzswik
patent: 4710686 (1987-12-01), Guzik

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