Electromagnetic Vibration and Acoustic Noise Analysis of Single Phase Flux Switching Motor

Single phase flux switching motors (FSM) usually has the problem of large torque ripple and obvious vibration and acoustic noise, which are often regarded as the major drawback of this type of motor. In this paper, the analytical expression of the radial force in single phase FSM is derived in terms of spatial order and frequency, and the influence of different rotor structures on the frequency distribution of radial force is analyzed. The experimental platform was built to test the vibration and acoustic noise of the motor, and compared with the radial electromagnetic force spectrum obtained from the finite element analysis (FEA) and the inherent frequency of the whole machine from the modal test.