Control circuit for a direct current motor

Details Control circuit for a direct current motor Control circuit for a direct current motor

1978-11-21

1980-11-25

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318349, 318505, 318514, 318442, H02P 516

Patent

active

042361036

ABSTRACT:
A control circuit for a direct current electric motor including a rectifying bridge for supplying the motor with direct current and a regulating circuit including a triac, the energizing angle of which is determined by a capacitor connected in series with a resistance network. An energy limiting circuit is provided including a resistance connectable in series with the resistance network and the capacitor when the voltage exceeds a predetermined value so that the motor can be operated on a 110 V or a 220 V supply.

REFERENCES:
patent: 2157417 (1939-05-01), Kneisley
patent: 3416059 (1968-12-01), Lagier
patent: 3454865 (1969-07-01), Ellert
patent: 3539892 (1970-11-01), Lindberg
patent: 3742337 (1973-06-01), Digneffe
Lytel, A., Electronic Motor Control, Howard W. Sams & Co., 1964, pp. 20-21.

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