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This paper presents a technique to reduce torque ripple in a fractional-slot PM brushless machine. A 12-slot/10-pole machine equipped with various stators design is the subject of investigation. A better torque performance at rated condition is desirable when additional permanent magnets are inserted on the stator part. The design optimization process on motor topology is performed in order to obtain...
This paper presents investigation of electromagnetic performances such as open-circuit flux-density, back-EMF and output torque on two fractional-slot PM brushless machines. Their ratios of slot-number to pole number are similar respectively, i.e. one with slot-number to pole number is differ by one and the other differs by two. Theirs main parameters such as split-ratio, axial length as well as rated...
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