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It is evident that winding inductance is a key design parameter, hence understanding how it varies with different winding types is essential. This paper presents a proposed finite element (FE) method in which the d- and q- axis inductances of the IPM machine with fractional-slot concentrated windings can be accurately determined. The effects that fractional-slot concentrated windings has on the d-...
In part I of this analysis, an overview of concentrated windings and open-circuit characteristics of its implementation on the IPM machine was covered. In this paper, analysis is performed on the same three winding configurations used in part I, but with the effects of armature excitation. MMF waveforms and harmonics, self-and mutual-inductance waveforms, saliency ratio, torque and power versus speed...
The implementation of concentrated windings in interior permanent magnet (IPM) machines has numerous advantages over distributed windings, with the disadvantage being mainly the decrease in saliency ratio. This paper presents a proposed finite element (FE) method in which the d- and q-axis inductances (Ld and Lq) of the IPM machine with fractional-slot concentrated windings can be accurately determined...
The application of concentrated windings in permanent magnet machines significantly reduces overall machine length, due to the elimination of end winding overlap making it more suitable for areas with space limitations. Efficiency is also increased due to the reduction of copper loss. In order to take full advantage of these benefits, optimization strategies have been implemented and its effects are...
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