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In this paper, the method of magnetic poles shifting was combined with optimization method to reduce cogging torque in solid-rotor permanent-magnet synchronous motors. Although the finite-element method (FEM) can calculate the cogging torque accurately, to find the peak value of cogging torque, the cogging torque for different relative positions between permanent magnets and slots must be calculated;...
In order to reduce the cogging torque, many methods have been advised and studied in permanent magnet(PM) motor. In this paper, the methods of pole arc coefficient of PM, armature teeth notching, PM shifting and different pole arc coefficient combination are studied and improved based on the analytical expression of cogging torque derived in this paper, and the methods to decide the design parameters...
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