Cyclic speed motor control circuit

Details Cyclic speed motor control circuit Cyclic speed motor control circuit

1985-05-02

1987-01-06

Shoop, Jr., William M.

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

318434, H02P 700

Patent

active

046349448

ABSTRACT:
A motor control circuit comprising a switching circuit which controls the supply of power from a source thereof to a motor responsive to a control signal, and a speed control circuit which generates the control signal. The speed control circuit can vary the motor speed cyclically, operating as an stable multi-vibrator. An overload protection circuit detects the occurrence of a current overload condition and either reduces to a low level the power delivered to the motor or inhibits the switching circuit's operation altogether.

REFERENCES:
patent: 3573584 (1971-04-01), Kearns
patent: 3728603 (1973-04-01), Kearns
patent: 3942083 (1976-03-01), Takahashi et al.
patent: 4132930 (1979-01-01), Schalk
patent: 4270074 (1981-05-01), Duckworth et al.

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