Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By induction-type converter
Patent
1980-03-06
1983-06-28
Skudy, R.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By induction-type converter
310 66, 310160, 336155, H02M 532
Patent
active
043909418
ABSTRACT:
A static magnetic frequency multiplier has iron structures which form a closed magnetic circuit and which carry a polyphase primary winding having p.sub.1 pole pairs distributed in slots. The winding legs, pitch, interleaving of circuits, setting of the slots, and the like, of the primary winding are so constructed that a voltage is induced at its terminals only by the fundamental of a field which has the pole pair number p.sub.1. In addition, the iron structures carry a secondary winding with the pole pair number p.sub.2 which is an uneven multiple of p.sub.1 and which is distributed in slots, being magnetically coupled to the primary winding. The secondary winding is designed so that no voltage is induced at its terminals by the fundamental of a field having the pole pair number p.sub.1. The iron structures are designed so that either the layer containing the slot teeth or the magnetic return path is subjected, at least in part, to a pronounced magnetic saturation by the magnetic field produced by the primary winding when it is supplied with the nominal primary voltage at the nominal frequency.
REFERENCES:
patent: 3177387 (1965-04-01), Leischner
patent: 3197660 (1965-07-01), Leischner
patent: 3445701 (1969-05-01), Shapiro
patent: 3777296 (1973-12-01), Ohyama
patent: 3930175 (1975-02-01), Chirgwin
patent: 4039910 (1977-08-01), Chirgwin
patent: 4160925 (1979-07-01), Ishikawa
ETZ-A, 1962, pp. 523-527; "Statische Frequenzumformung von 50 Hz Drehstorm Auf 150 Hz Drehstrom"; P. Mertens; Aachen, Germany.
Benecke Wilhelm
Rosenberg Heinz
Siemens Aktiengesellschaft
Skudy R.
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