Analysis of restraining circulation loss by transposition of stator scattered-wire winding in high speed motor
Copper loss in stator windings is one of the main sources of loss in high-speed permanent magnet motors.For multi-coiled loose-embedded windings,the voltage induced by different leakage magnetic fields of each wire is different,which leads to the formation of circulating current between wires.The extra AC additional copper loss has become the main factor limiting the power density and efficiency improvement of this kind of motors In this paper,the current imbalance between different strands caused by circulating current between parallel wires is studied.The circulating current loss of windings is suppressed by transposition of winding ends,and the effectiveness of circulating current suppression is verified by design experiments.
permanent magnet motorcirculation losstransposition of winding
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