Protective circuit for selectively applying power to a motor

Details Protective circuit for selectively applying power to a motor Protective circuit for selectively applying power to a motor

1978-03-20

1979-10-30

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

242203, 318 8, H02H 700

Patent

active

041730291

ABSTRACT:
A protective circuit is described for selectively applying power to a motor. The circuit includes a power switch which closes and opens to apply and remove power from the motor, and a control for diverting reactively inducted motor current from the power switch back to the motor via a current path when the power switch is opened. The control opens the current path when the power switch opens and remains open for a predetermined interval so that, when the motor is unenergized and mechanically rotated, the motor is not braked by current flow through the current path and the motor.

REFERENCES:
patent: 2845580 (1978-07-01), Smith
patent: 3260912 (1966-07-01), Gregory
patent: 3739192 (1973-06-01), Oswald
patent: 4121138 (1978-10-01), Flint et al.

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