A Novel Flux-Switching Permanent Magnet Machine with Dual Sets of Magnet Arrangements

Flux-switching permanent magnet machine has the advantages of high-power density and high efficiency. It has a wide range of applications in aerospace and automotive fields. But due to the doubly salient structure of the machine, the machine has a large cogging torque. In order to effectively improve the electromagnetic performance of the machine, a novel 12/10 flux-switching permanent magnet machine is proposed in this paper. Radial magnetized permanent magnets are arranged on both sides of the permanent magnet (PM) to reduce the magnetic flux leakage of the stator yoke and reduce the torque ripple by stator teeth chamfering (PM side). Firstly, the cogging torque expression of the machine is derived by energy method and Fourier decomposition method. Then the response surface model between the key parameters of the machine and the output torque is constructed based on the response surface method, and the optimal parameter solution is obtained by response surface optimization. Finally, an optimized two-dimensional finite element method is established. Compared with the conventional model, proposed model can effectively reduce the cogging torque and improve the average torque.