Gurney L Godwin

US Patent:

44220286, Dec 20, 1983

Filed:

May 12, 1981

Appl. No.:

6/262737

Inventors:

Gurney L. Godwin - Georgetown TX
Alvin M. Vance - Georgetown TX

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02P 540

US Classification:

318718

Abstract:

A brushless excitation system for a synchronous motor with a holding current resistor connected across the motor field winding to insure turning on of a semiconductor excitation control switch due to a gating pulse of limited duration.

US Patent:

41587880, Jun 19, 1979

Filed:

Sep 27, 1977

Appl. No.:

5/837231

Inventors:

Gurney L. Godwin - Georgetown TX

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02K 300

US Classification:

310198

Abstract:

A pole amplitude modulated dynamoelectric machine having a specific harmonic suppressed by expanding the electrical angle of the phase belts as well as the method for doing the same is disclosed.

US Patent:

44095074, Oct 11, 1983

Filed:

Jun 28, 1982

Appl. No.:

6/392427

Inventors:

Gurney L. Godwin - Georgetown TX

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H02K 2334

US Classification:

310205

Abstract:

A winding technique for multiphase machines is presented that utilizes a core of Q slots and P poles for M phases where Q/M is an integer but the number of slots per phase per pole Q/M/P is a non-integer expressible as a fraction N/D reduced of common factors and M and D have a common factor of at least two. Fractional-slot, nearly but not quite balanced, windings are provided by providing a distant coil grouping for D poles in which the number of coils in the coil groups for the D poles equals N for an individual phase and the pattern is repeated for the additional poles to provide the total of P pole windings. The near balancing of the windings succeeds in achieving sufficient voltage balancing and low torque harmonics for successful operation and is advantageous for avoiding a need to provide additional core designs.