Abstract：In variable frequency speed control drive system of permanent magnet synchronous motor

（PMSM），high power factor（PF）operation of the motor can reduce the reactive power loss of the system，thereby fully utilizing the capacity of inverter. A characteristic equation between d，q-axis current and power factor was established，and the d，q-axis current set and equal power factor curve with any power factor were solved ，so that the power factor characteristics of PMSM under different operating conditions were analyzed clearly. Additionally，the optimal power factor operating points for permanent magnet synchronous motor was provided based on these characteristics. Finally，a simulation model was built by Matlab/Simulink software，and the correctness of the theoretical analysis was verified through simulation results.

        Key words：permanent magnet synchronous motor（PMSM）；power factor（PF）；characteristic analysis；

optimal operating point

     Format Citation:何俊鹏，巩凤珺，孟慧彬,等. 永磁同步电机功率因数特性分析与研究[J].电气传动,2026,56(10):8-15. HE Junpeng，GONG Fengjun，MENG Huibin,et al. Analysis and research on power factor characteristics of permanent magnet synchronous motor [J].Electric Drive, 2026,56(10):8-15