Motor speed control apparatus

Details Motor speed control apparatus Motor speed control apparatus

1980-02-07

1982-11-23

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318314, H02P 516

Patent

active

043607675

ABSTRACT:
A motor speed control apparatus includes a motor, a frequency generator for generating a detective frequency signal, the frequency of which is proportional to the motor speed, and a control signal generator. A rotational speed-error pulse train is produced by the control signal generator and is used for improving the load characteristics of the motor. The rotational speed of the motor is maintained constant at a predetermined speed, which is proportional to the reference frequency, for any load torque, the motor speed is not influenced by ambient temperature changes or long term characteristic variations of the electronic components utilized. Furthermore, the transient response of the motor is fast and the motor starts rotating smoothly and stably.

REFERENCES:
patent: 3206665 (1965-09-01), Burlingham
patent: 3898690 (1975-08-01), Desai
patent: 3974428 (1976-08-01), Hafle
patent: 4155033 (1979-05-01), De Bell et al.

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