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The mechanism and the influence of the on-load terminal phase voltage distortion by the armature reaction in interior permanent magnet (IPM) machines with fractional-slot concentrated windings (FSCWs) are investigated in this paper, by taking a 12-slot/8-pole machine as an example. The phenomenon is presented first, which shows that the peak voltage will be much higher than the fundamental value,...
The on-load voltage distortion in interior permanent magnet (IPM) machine refers to the terminal voltage distorted by armature reaction. In this paper, the mechanism of the on-load voltage distortion have been investigated with the aid of frozen permeability method based on both fractional and integer slot IPM machines. It reveals that the local magnetic saturation caused by armature reaction will...
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