Research on magnet structure design and torque performance optimisation of permanent magnet synchronous motors

Based on the issues of substantial torque fluctuation, severe magnetic leakage, and low efficiency in conventional rectangular embedded permanent magnet synchronous motors (PMSM), this paper introduces an arc-trapezoidal magnet (ATM) structure aimed at enhancing the torque performance of the motor. Through comprehensive simulation analysis and experimental validation, the design parameters are optimised via orthogonal experimental, leading to the identification of the optimal parameter set. Experimental results reveal a 26.8% increase in average motor torque, a 51.2% reduction in torque fluctuation, and a significant improvement in the motor's output torque performance.