Method of converting phase and frequency using a dynamo-electric

Details Method of converting phase and frequency using a dynamo-electric Method of converting phase and frequency using a dynamo-electric

1975-12-05

1977-08-02

Beha, Jr., William H.

Electric power conversion systems

Cascaded or combined, diverse conversions in which the...

Combined phase and frequency conversion

318219, 323117, 363150, H02M 532

Patent

active

040399222

ABSTRACT:
A dynamoelectric machine stator has a primary winding for single phase alternating current input and a secondary winding for polyphase alternating current to be supplied from output terminals. The secondary winding is connected such that at least two frequencies are provided at the terminals. The rotor has two windings thereon for excitation, one being excitable for one frequency output and the other rotor winding being excitable for another frequency output at the secondary terminals. Another secondary winding may be provided on the stator to obtain a desired output terminal voltage at one of the selected frequencies.

REFERENCES:
patent: 1417732 (1922-05-01), Hellmund
patent: 1499359 (1924-07-01), Fortescue
patent: 1499360 (1924-07-01), Fortescue
patent: 1662549 (1928-03-01), Von Kando
patent: 1808435 (1931-06-01), Punga
patent: 2692365 (1954-10-01), Letrilliart

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