Multi-speed motor control system

Details Multi-speed motor control system Multi-speed motor control system

1994-07-18

1996-05-07

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318794, 318795, H02P 144

Patent

active

055149430

ABSTRACT:
A motor control system for a multi-speed electric motor electrically excited by a power source having at least two terminals. The motor controller system includes a switching device electrically connected to the terminals of the power source for alternating current flow from the power source, a first speed circuit, and a second speed circuit. The first speed circuit includes a first speed primary winding electrically connected to the switching device, a first speed secondary winding electrically connected to the first speed primary winding, a start capacitor electrically connected to the first speed secondary winding, and start relay electrically connected to the start capacitor. The second speed circuit includes a second speed primary winding which is connected to the switching device.

REFERENCES:
patent: 1886895 (1932-11-01), Myers
patent: 2068559 (1937-01-01), Michelsen
patent: 2084058 (1937-06-01), Lyden
patent: 2462184 (1949-02-01), Hathaway et al.
patent: 2669683 (1954-02-01), Burdett
patent: 3153184 (1964-10-01), Stout
patent: 3887854 (1975-06-01), Parks
patent: 4066937 (1978-01-01), Pfarrer et al.
patent: 4388581 (1983-06-01), Bhatnagar
patent: 4408150 (1983-10-01), Holston et al.
patent: 5227710 (1993-07-01), Lewus

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