永磁同步电机（PMSM）参数受所处环境等非线性因素的影响而变化，因此需要根据电机参数的不同调节控制系统，以达到更优的控制性能。针对不同电机的参数不同且无法实现快速手动测量的问题，提出一种无位置传感器PMSM的新型分步式参数辨识系统。系统分阶段采用伏安法计算电阻并采用高频电压注入法计算电机的电感和磁链，实现了无位置传感器的控制条件下，内置式PMSM的参数自动辨识。最后通过MATLAB/Simulink搭建仿真模型，验证了新型分步式参数辨识系统的可靠性并通过试验验证了系统的准确性。

Permanent magnet synchronous motor (PMSM) parameters are affected by the environment and other nonlinear factors. So it is necessary to adjust the control system according to the motor parameters to achieve better control performance. A new step-by-step parameter identification system for position sensorless PMSM is presented to solve the problems that the parameters of different motors are different and the fast manual measurement can not be realized. The resistance is calculated by volt-ampere method in stages and the inductance and magnetic chain of the motor are calculated by high-frequency voltage injection method. The parameters of the built-in PMSM can be identified automatically under the position sensorless control. Finallythe reliability of the new step-by-step parameter identification system is verified by building a simulation model with MATLAB/Simulink and the accuracy of the system is verified by experiments.