Abstract：In the low-speed sensorless position detection technology of permanent magnet synchronous motor (PMSM), the traditional high-frequency square-wave voltage injection method is sensitive to measurement error and is susceptible to sampling delay and non-linear effects of the inverter. Thus, a new method of position error extraction is proposed, which replaces the traditional differential current demodulation method with the demodulation method of continuous signal, to reduce the sensitivity of the system to sampling error. First, a high-frequency square-wave voltage was injected into the estimated d-axis, and the high-frequency current component was obtained by current sensors. Then, the current response in the estimated q-axis was decomposed into a sum of sinusoidal signals of different frequencies by Fourier decomposition. After multiplying the sum of sinusoidal signals with a fixed frequency cosine modulation wave, the rotor position error was obtained through a low-pass filter, and the initial value of rotor position was obtained by the position tracker. Finally, based on the saturation effect of magnetic circuit, the magnetic pole polarity was identified by the applied current bias method. The simulation and the experimental results show that, the proposed method has fast convergence, low sampling frequency, insensitivity to sampling error, small phase delay and high detection accuracy.
李文真, 刘景林, 陈双双. 基于高频方波信号注入法的永磁同步电机转子位置检测方法[J]. 电工技术学报, 2018, 33(24): 5821-5829.
Li Wenzhen, Liu Jinglin, Chen Shuangshuang. Permanent Magnet Synchronous Motor Rotor Position Detection Method Based on High-Frequency Square-Wave Signal Injection. Transactions of China Electrotechnical Society, 2018, 33(24): 5821-5829.
[1] Kwon Y C, Sul S K, Baloch N A, et el. Improved design of IPMSM for sensorless drive with absolute rotor position estimate capability[J]. IEEE Transa- ctions on Industry Applications, 2016, 52(2): 1441-1451. [2] 刘计龙, 肖飞, 沈洋, 等. 永磁同步电机无位置传感器控制技术研究综述[J]. 电工技术学报, 2017, 32(16): 76-88.Liu Jilong, Xiao Fei, Shen Yang, et al. Position- sensorless control technology of permanent-magnet synchronous motor—a review[J]. Transactions of China Electrotechnical Society, 2017, 32(16): 76-88. [3] Liu J M, Zhu Z Q.Improved sensorless control of permanent-magnet synchronous machine based on third-harmonic back EMF[J]. IEEE Transactions on Industry Applications, 2014, 50(3): 1861-1870. [4] 朱瑛, 程明, 花为. 基于滑模变结构模型参考自适应的电气无级变速器无传感器控制[J]. 电工技术学报, 2015, 30(2): 64-72.Zhu Ying, Cheng Ming, Hua Wei. Sensorless control for electrical variable transmission based on sliding mode model reference adaptive system[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(2): 64-72. [5] Sang I K, Jun H I, Eui Y S.A new rotor position estimation method of IPMSM using all-pass filter on high-frequency rotating voltage signal injection[J]. IEEE Transactions on Industry Applications, 2016, 63(10): 6499-6509. [6] 刘海东, 周波, 郭鸿浩, 等. 脉振高频信号注入法误差分析[J]. 电工技术学报, 2015, 30(6): 38-44.Liu Haidong, Zhou Bo, Guo Honghao, et al. Error analysis of high frequency pulsating signal injection method[J].Transactions of China Electrotechnical Society, 2015, 30(6): 38-44. [7] Yoon Y D, Sul S K, Morimoto S, et al.High-band width sensorless algorithm for AC machines based on square-wave-type voltage injection[J]. IEEE Transa- ctions on Industry Applications, 2011, 47(3): 1361-1370. [8] Kim S, Ha J I, Sul S K.PWM switching frequency signal injection sensorless method in IPMSM[J]. IEEE Transactions on Industry Applications, 2012, 48(5): 1576-1587. [9] Nae C P, Sang H K.Simple sensorless algorithm for interior permanent magnet synchronous motors based on high-frequency voltage injection method[J]. IEEE Transactions on Power Electronics, 2014, 8(2): 68-75. [10] 薛映霞, 陈庆, 何凤有. 高频方波注入的永磁电机无传感器控制改进算法[J]. 电气传动, 2017, 47(2): 15-19.Xue Yingxia, Chen Qing, He Fengyou. Improved algorithm of sensorless control of PMSM based on high frequency square wave signal injection[J]. Electric Drive, 2017, 47(2): 15-19. [11] Ni Ronggang, Xu Dianguo, Frede Blaabjerg.Square-wave voltage injection algorithm for PMSM position sensorless control with high robustness to voltage errors[J]. IEEE Transactions on Power Electronics. 2017, 32(7): 5425-5437. [12] Dongouk Kim, Yong C K, Seung K S.Suppression of injection voltage disturbance for high-frequency square-wave injection sensorless drive with regulation of induced high-frequency current ripple[J]. IEEE Transactions on Industry Applications, 2016, 52(1): 302-312. [13] Shih C Y, Yang S M, Hu J H.Design consideration of interior permanent magnet machine position sensor- less drive using square-wave voltage injection[C]// IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, 1: 1-6. [14] Wang G L, Yang L, Yuan B H.Pseudo-random high- frequency square-wave voltage injection based sensorless control of IPMSM drives for audible noise reduction[J]. IEEE Transactions on Industrial Elec- tronics, 2016, 63(12): 7423-7433. [15] Wang G L, Yang L, Zhang G Q.Comparative investigation of pseudorandom high-frequency signal injection schemes for sensorless IPMSM drives[J]. IEEE Transactions on Power Electronics, 2017, 32(3): 2123-2132. [16] 尹忠刚, 张彦平, 张延庆. 采用免疫高频脉动信号注入的PMSM转速辨识方法[J]. 电工技术学报, 2016, 31(增刊2): 243-254.Yin Zhonggang, Zhang Yanping, Zhang Yanqing. High frequency pulsating signal injection for permanent magnet synchronous machines based on immune algorithm[J]. Transactions of China Electro- technical Society, 2016, 31(S2): 243-254. [17] 刘颖, 周波, 冯瑛. 永磁同步电机低速无传感器控制及位置估计误差补偿[J]. 电工技术学报, 2012, 27(11): 38-45.Liu Ying, Zhou Bo, Feng Ying. A novel sensorless control method of spmsm at low speed and estimated rotor position error compensation[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 38-45. [18] 刘景林, 鲁家栋. 基于相电流正负序分量相角差的高精度内置式永磁同步电机转子初始位置检测方法[J]. 电工技术学报, 2016, 31(23): 63-69.Liu Jinglin, Lu Jiadong. High-precision estimation method of initial rotor position for IPMSM based on phase difference of positive and negative sequence current component[J]. Transactions of China Electro- technical Society, 2016, 31(23): 63-69. [19] 张国强, 王高林, 徐殿国. 基于无滤波器方波信号注入的永磁同步电机初始位置检测方法[J]. 电工技术学报, 2017, 32(13): 162-168.Zhang Guoqiang, Wang Gaolin, Xu Dianguo. Filterless square-wave injection based initial position detection for permanent magnet synchronous machines[J]. Transactions of China Electrotechnical Society, 2017, 32(13): 162-168.
2018, Vol. 33 
