Speed control system and method for electric motor

Details Speed control system and method for electric motor Speed control system and method for electric motor

1981-12-21

1983-10-04

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318729, 318817, 318438, H02P 528

Patent

active

044081502

ABSTRACT:
A speed control for an electric motor comprising a capacitor interconnected in series with the main windings of the motor and a multi-position speed selector switch for selectively energizing one or more series connected main windings of the motor and, in a slow speed mode of operation, for serially connecting the capacitor to the series connected main windings so that the motor operates at a slower speed.
A method of speed control for an electric motor is also disclosed.

REFERENCES:
patent: 850203 (1907-04-01), Barker
patent: 1726231 (1929-08-01), Kennedy
patent: 1783175 (1930-12-01), Jordan
patent: 1978581 (1934-10-01), Johnson
patent: 2120321 (1938-06-01), Bargdill
patent: 2648808 (1953-08-01), Tiede
patent: 4119894 (1978-10-01), Sorensen

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