Abstract：In order to overcome the defects which is brought by the installation of speed sensor, and also to solve the failure of low speed operation in traditional technique, a high frequency voltage is injected into the motor and causes a little change of current signal because of the anisotropy of the machine. The method which does not depend on the motor fundamental equations and parameters is based on natural or artificial motor salient effect. Rotor position and speed including zero speed can be effectively estimated. The way to observe the original motor position when PMSM is standstill is also presented in order to solve the starting problem of PMSM．Simulation results illustrate that the proposed method can reliably realize on the low speed and control of the rotor position and speed, including initial position; and the system has good performance both in steady and dynamic states.
李源源, 黄守道, 徐琼, 刘雄, 龙徐. 基于脉振高频电压注入的永磁同步电机无速度传感器控制[J]. 电工技术学报, 2013, 28(1增): 326-330.
Li Yuanyuan, Huang Shoudao, Xu Qiong, Liu Xiong, Long Xu. Sensorless Control of Permanent Magnet Synchronous Motor Based on High Frequency Voltage Signal Injection. Transactions of China Electrotechnical Society, 2013, 28(1增): 326-330.
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2013, Vol. 28 
