关键词: 内置式永磁同步电机, 无速度传感器, 非线性磁链观测器, 磁场定向控制

Abstract: The nonlinear flux observer method is widely used in surface mounted permanent magnet synchronous motor ( SPMSM) due to its excellent low-speed performance and starting load capacity, without the need for algorithm switching throughout the entire process. In order to solve the application of nonlinear flux observer in interior permanent magnet synchronous motor ( IPMSM) , based on the principle of nonlinear flux observer and IPMSM state equation, a nonlinear flux observer algorithm applicable to interior permanent magnet synchronous motor was designed using the concept of active flux. The simulation and experimental results show that the nonlinear flux observer for salient permanent magnet synchronous motor has simple parameter tuning, fast dynamic response, low speed fluctuation and angle tracking error, strong robustness about motor parameter, and high engineering practical value.

Key words: interior permanent magnet synchronous motor( IPMSM), speed sensorless, nonlinear flux observer, fieldoriented control