脉振高频电压注入法(PHFVI)利用在电机中产生的凸极效应有效解决了电机无传感器控制在零低速范围内的许多难题。针对永磁同步电机(PMSM)在零低速范围内的PHFVI控制策略存在的动态性能差及估计误差大问题，在传统方法的基础上，提出了一种新型PHFVI，在对高频信号的电流响应进行信号解调时，同时考虑了估计同步坐标系中的直轴分量与交轴分量，且转速与转子位置的获取过程中使用了锁相环(PLL)技术，理论分析并建立PMSM数学模型后，对PLL的设计过程进行了严格的推导。最后，对整体设计方案进行了全面的仿真，仿真结果证明PMSM在新型高频注入法下的动态性能更好，估计误差更小，鲁棒性更强。

Many problems of the sensorless control of the motor in zero- and low-speed range are solved effectively by the pulsed high-frequency voltage injection (PHFVI) utilizing the salient pole effect generated in the motor. However, there still exist poor stability and large estimation error in the PHFVI control strategy when permanent magnet synchronous motor (PMSM) runs in the range of zero and low speed. For these problems, a new method of PHFVI is proposed based on the traditional method. The d axis component and the q axis component in the estimation synchronous coordinate system are both considered in the new method when the current response signal is demodulated, and the phase-locked loop (PLL) technology is used in the process of obtaining the speed and rotor position. After the theory is analyzed and the mathematical model of PMSM is built, the design process of PLL is strictly deduced. Finally, the overall design is verified by the comprehensive simulation. The results show that with the novel PHFVI method, the PMSM system has better stability, less error in position estimation, and better robustness.