Pole-changing three-phase winding for optional, fractional pole-

Details Pole-changing three-phase winding for optional, fractional pole- Pole-changing three-phase winding for optional, fractional pole-

1983-06-29

1985-07-09

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

318773, H02K 300

Patent

active

045284725

ABSTRACT:
For the desired pole-pair number combination p.sub.1 /p.sub.2 always those coils are omitted from the individual phases of the first pole-pair number p.sub.2, which form overlapping phase bands for the second pole-pair number in the coil side star; the remaining coils of each phase for 2p.sub.1 are distributed symmetrically along the periphery and in accordance with ##EQU1## over the base-speed winding connected in three-phase wye/three-phase wye configuration and the dead winding branches N.sub.1, connected in parallel or in series to it, for the first pole-pair number p.sub.1, whereby at least a large portion of the omitted coils is configured as additional dead branches for the second pole-pair number p.sub.2.

REFERENCES:
patent: 3614497 (1971-10-01), Brenner
patent: 3927358 (1975-12-01), Broadway et al.
patent: 3949253 (1976-04-01), Broadway
patent: 4127787 (1978-11-01), Auinger
patent: 4144470 (1979-03-01), Auinger
patent: 4163915 (1979-08-01), Fong
patent: 4284919 (1981-08-01), Auinger
"Symmetry of Multi-Phase Windings with Differently Grouped Parallel Branches or Winding Phases", Siemens Research & Development Reports, vol. 6 (1977), No. 4, pp. 211-219.
H. Auinger, "Polumschaltbare Dreiphasenwicklung in Umgruppierungsschaltung mit sechs Klemmen fur beliebige gebrochene Polzahlverhaltnisse", Siemens Research and Development Report, vol. 12, No. 2, 1983.
"Speed-Changing Motors with Pole-Amplitude Modulated Windings", by D. G. Searle, pp. 6-10.

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