Parameter Sensitivities Analysis and Optimization Design for Permanent Magnet Flux-Switching Motor by Nonlinear Varying-Network Magnetic Circuit Method

摘要

In this paper, a new sensitivity nonlinear varying-network magnetic circuit (VNMC) method is proposed for an outer-rotor I-shaped permanent magnet flux-switching (I-PMFS) motor. By integrating concept of sensitivity into the nonlinear VNMC method, the whole design efficiency can be improved effectively. In the optimization process, three design objectives are selected, containing output torque, torque ripple and the amplitude of back-EMF. Based on the sensitivity analysis, the parameters possessing the significant effects on the design objectives can be selected purposely, thus the whole amount of calculation is obviously reduced. After the determination of the sensitive parameters, the rest of optimization can be completed efficiently by the nonlinear VNMC method. Finally, a prototype motor is manufactured and tested. Both theoretical analysis and experimental results confirm the effectiveness of the proposed method.