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Magnet Eddy Current Loss Reduction in Permanent Magnet Machines

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Figure

Fig. 3 shows the MMF distribution when IphaseAmechanical degree. It should be noticed that measurable even order armature MMF harmonics exist in a 3-slot/2-pole machine, which is mainly due to the diametrically asymmetric Iamplitude of MMF and phaseA =0 A,
Fig. 4. Air-gap permeance distribution accounting for conventional stator slots  and auxiliary slots
Fig. 7. 3D magnet eddy current loss distribution under rated working condition  (IphaseA=0 A)
Fig. 11. Cogging torque comparison under no-load condition.  Rotor position (Elec. Deg
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