DC Motor control circuit

Details DC Motor control circuit DC Motor control circuit

1977-08-04

1981-06-02

Smith, Jr., David

Electricity: motive power systems

Braking

Dynamic braking

318380, H02P 312

Patent

active

042713838

ABSTRACT:
A DC motor control circuit for providing improved starting and stopping control is provided. The control circuit includes a DC motor that is driven in response to an operating voltage applied thereto. A shunting element is adapted to define a current path in parallel with the DC motor to selectively shunt the operating voltage applied to the DC motor. A DC supply is provided for producing a DC signal, and a constant voltage supply circuit is coupled intermediate the DC supply and the parallel connection of the shunt element and DC motor to selectively apply a constant operating voltage to the DC motor. A control circuit is provided for coincidentally applying a control signal to the constant voltage circuit and to the shunt element to effect a coincident shunting of the operating voltage applied to the DC motor and a cutting-off of the application of the operating voltage to the DC motor.

REFERENCES:
patent: 3188547 (1965-06-01), Zelina
patent: 3440511 (1969-04-01), Igarashi et al.
patent: 3566229 (1971-02-01), Wickens
patent: 3919611 (1975-11-01), Takahashi et al.

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