Circuit and winding arrangement for a multiphase electric rotati

Details Circuit and winding arrangement for a multiphase electric rotati Circuit and winding arrangement for a multiphase electric rotati

1988-07-13

1989-12-26

Skudy, R.

Electricity: motive power systems

Induction motor systems

Primary circuit control

310 71, 310184, H02P 132

Patent

active

048900494

ABSTRACT:
A switchable arrangement for at least three different operating states is made possible with a minimum number of external winding terminals and a switching device as simple as possible, and current heating of the entire winding as uniform as possible. In the starting-up stages with free adaptation of the inrush current reduction and far-reaching avoidance of disturbing field harmonics is provided. The machine impedance is increased over the normal operating stage by the provision that in the normal operating stage the parallel connected winding branches assigned to a leg are separated and are assigned to different branches, remain without current in part in individual stages and/or are operated with partly different direction of excitation.

REFERENCES:
patent: 1849519 (1932-03-01), Gay
patent: 1927208 (1933-09-01), Gay
patent: 2217460 (1940-10-01), Trassl
patent: 4338557 (1982-07-01), Vanlass
Patent Abstracts of Japan, vol. 4, No. 170, Nov. 22, 1980, Appln. No. 55 117 491.
Conti Electro Berichte; Schaltung von Induktionsmotoren Fur Mehrstufige Stern-Dreieck Einschaltung; H. O. Seinisch; pp. 212-215; 10-12/1965.
Induktionsmachinen; W. Schuisky; p. 284; 1957; Vienna; Springer Verlag.
Die Wicklungen Electrischer Machinen; H. Sequenz; vol. 3; Wechselstrom-Sonderwicklungen; Vienna; Springer Verlag; 1954.

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