Abstract
A shape optimization method by using combination of stress and electromagnetic field analyses has been developed for the design of high-speed motors. In the stress analysis, the mechanical stress caused by centrifugal force in the rotor is estimated. In the electromagnetic field analysis, the loss and torque of the motor are estimated. The permeability and the core-loss coefficients used in the electromagnetic field analysis are modified due to the results of the stress analysis. The validity of the optimization is confirmed by the measurement of a prototype motor. The measured and calculated results are found to be in good agreement. The proposed method is useful for high-speed motor designs.
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