Patent
Pole-amplitude modulation, pole-changing electric motors and generators
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TLDR
In this paper, a pole-amplitude modulation (P.A.M) three-phase, pole-number changing machine having star-connected and delta-connected stator winding components was proposed.Abstract:
A pole-amplitude modulation (P.A.M.) three-phase, pole-number changing machine having star-connected and delta-connected stator winding components, thereby providing additional means for reducing m.m.f. harmonics in the resultant three-phase field. Pole-number changing is effected by reversing the star-connected winding component relatively to the delta-connected component. A design method defines relationships between alternative pole-numbers and stator slot number, and slot-spacing between star- and delta-connected components.read more
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Patent
Rotary electric machines
TL;DR: A single-phase alternating current capacitor-start electric motor with a stator winding wound as two components spaced 90+/-N DEG electrically, where N is a small angle but never zero as mentioned in this paper.
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TL;DR: In this paper, a pole-changeable three-phase winding for p 1 :p 2 =(3m±1)/3n (m and n being integers) was proposed.
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Patent
Alternating current electric motors and generators
TL;DR: In this article, a three-phase, alternating current, pole-amplitude modulation (P.A.M) motors or generators having series/parallel connection of phase winding parts for the alternate pole-members is presented.