Maxwell Magnetic Flux Leakage Simulation for Detecting High Resistance Connection Fault of Permanent Magnet Synchronous Motor

Permanent magnet synchronous motors (PMSMs) are excited by permanent magnet, which has the advantages of simple structure, safe operation, low cost, low heating and low noise. Therefore, it is widely used in new energy vehicles, electric buses and other transportation fields. High resistance connection (HRC) is a common fault of PMSM, which affects the operation of the motor. In this paper, a 48-slot 8-pole PMSM is used to analysis the HRC fault of the motor. Firstly, the Maxwell-2D model of the PMSM is constructed in ANSYS software. Simulation is carried out under four states: health, 60 Ω high resistance, 80 Ω high resistance and 100 Ω high resistance. ANSYS and MATLAB are used to analyze the magnetic flux leakage of the motor, and the magnetic flux leakage spectrum diagrams are obtained in each state. Secondly, the sampled data are classified and processed by neural network, and the accuracy of the simulated data is verified by training and simulation. Finally, the characteristic values in different states are found through spectrum analysis to analyze the distinctions of different fault states. The characteristic values in the flux leakage spectrum can be used to identify the fault, and the analysis results can be used as a reference for diagnosing HRC fault of PMSM.