Arrangement for controlling the speed of a DC motor

Details Arrangement for controlling the speed of a DC motor Arrangement for controlling the speed of a DC motor

1984-11-29

1986-05-27

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318257, 318314, 318344, 318345D, H02P 5175

Patent

active

045917698

ABSTRACT:
An improved arrangement for controlling the speed and direction of rotation of a DC motor responds to a variable bipolar input signal. A bipolar threshold detector coupled to the motor is used for the selective triggering of a triac during the appropriate half wave polarity of an AC source. Triac failure is prevented by a protection circuit. The arrangement incorporates a speed servo and senses the voltage across the triac to detect the speed of the motor.

REFERENCES:
patent: 3453517 (1969-07-01), Kennedy et al.
patent: 3673479 (1972-06-01), Horton
patent: 3857076 (1974-12-01), Hetland
patent: 3857077 (1974-12-01), Kasmer
patent: 4390823 (1983-06-01), Brown et al.
patent: 4412158 (1983-10-01), Jefferson et al.
patent: 4465957 (1984-08-01), Crockett
patent: 4481448 (1984-11-01), Bishop

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