Spatial Harmonic Magnetomotive Forces in Irregular Windings and Special Connections of Polyphase Windings
- 1 December 1964
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. 83 (12) , 1246-1253
- https://doi.org/10.1109/tpas.1964.4765969
Abstract
A general procedure for calculating the magnitudes of all the spatial harmonic magnetomotive-force (mmf) waves is developed. This method is applicable to any polyphase winding with uniform coils and slot pitches, which is excited by a balanced polyphase supply and in which any or all of the coils are energized, no matter how they are connected. The procedure was programmed for a digital computer and numerous illustrative examples were computed; these include: comparison of a 24-slot 6-pole irregular winding with a 27-slot fractional-slot winding, effects of transposition of phase coils between groups, part-winding starting with adjacent poles excited and with alternate groups excited, three double-delta starting arrangements, and a 2-speed motor with pole-amplitude modulation. Previously published studies on these connections confirm the accuracy of the analysis presented here.Keywords
This publication has 3 references indexed in Scilit:
- Ten Part-Winding Arrangements in Sample 4-Pole Induction Motor [includes discussion]Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1955
- A New Method for Part-Winding Starting of Polyphase Motors [includes discussion]Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1955
- Irregular Windings in Wound Rotor Induction MotorsTransactions of the American Institute of Electrical Engineers, 1934