Abstract Based on the analysis of the permanent magnet synchronous motor (PMSM) model, the paperproposes a speed sensorless control method based on the estimated current model.The commonly used algorithm has the following shortcomings: limited scope of applications,poor robustness, and the instability caused by switching states.Therefore, motor’s startup performance, operation stability, and low speed performance will be affected. The method proposed in this paper selects the observer parameters according to the described principle, uses the error signals between the estimation current and the actual detection current in each sampling period to correct the estimate speed value. By doing this, the motor can quickly start from the stationary state with closed-loop vector control. The experimental results verify the feasibility and reliability of the analysis and design.The motor can quickly start from the stationary state and be accelerated to the rated speed (6 000 r/min) from zero within 1s. In the high speed range, the performance is very stable and the maximum velocity error is less than 0.2%. In thelow speed range, the motor has high loading capacity, i.e. it can still run stably with full load at 2% rated speed. These properties may greatly expand the applied range of the PMSM, have great engineering practical value, and have been successfully applied in industrial products.
[1] 吕帅帅,林辉,马冬麒.基于最优占空比调制的永磁同步电机直接转矩控制[J].电工技术学报,2015,30(1):35-42. Lü Shuaishuai,Lin Hui,Ma Dongqi.Direct torque control for permanent magnet synchronous motor with optimal duty cycle control[J].Transactions of China Electrotechnical Society,2015,30(1):35-42. [2] 朱军,田淼,付融冰,等.基于载波频率成分的永磁同步电机转子定位研究[J].电力系统保护与控制,2015,43(14):48-54. Zhu Jun,Tian Miao,Fu Rongbing.Research on rotor position of permanent magnet synchronous motor based on carrier frequency component[J].Power System Protection and Control,2015,43(14):48-54. [3] Lee J,Hong J,Nam K,et al.Sensorless control of surface-mount permanent magnet synchronous motors based on a nonlinear observer[J].IEEE Transactions on Power Electronics,2010,25(2):290-297. [4] 易伯瑜,康龙云,陶思恋,等.永磁同步电机抗扰高阶滑模观测器设计[J].电工技术学报,2014,29(5):132-140. Yi Boyu,Kang Longyun,Tao Silian,et al.Design of robust high order sliding mode observer for permanent magnet synchronous motors[J].Transactions of China Electrotechnical Society,2014,29(5):132-140. [5] 张晓光,孙力,赵克.基于负载转矩滑模观测的永磁同步电机滑模控制[J].中国电机工程学报,2012,32(3):111-116. Zhang Xiaoguang,Sun Li,Zhao Ke.Sliding mode control of PMSM based on a novel load torque sliding mode observer[J].Proceedings of the CSEE,2012,32(3):111-116. [6] 钱荣荣,骆敏舟,赵江海,等.永磁同步电动机新型自适应滑模控制[J].控制理论与应用,2013,30(11):1414-1421. Qian Rongrong,Luo Minzhou,Zhao Jianghai,et al.Novel adaptive sliding mode control for permanent magnet synchronous moto[J].Control Theory & Applications,2013,30(11):1414-1421. [7] 陆婉泉,林鹤云,冯奕,等.永磁同步电机无传感器控制的软开关滑模观测器[J].电工技术学报,2015,30(2):106-113. Lu Xiaoquan,Lin Heyun,Feng Yi,et al.Soft switching sliding mode observer for PMSM sensorless control[J].Transactions of China Electrotechnical Society,2015,30(2):106-113. [8] 张磊,高春侠.改进型永磁同步电机全速度范围无传感器控制策略[J].电机与控制学报,2012,16(7):103-110. Zhang Lei,Gao Chunxia.An improved whole speed region sensorless control theme for permanent magnet synchronous motors[J].Electric Machines and Control,2012,16(7):103-110. [9] 王高林,杨荣峰,李刚,等.基于高频信号注入的 IPMSM 无位置传感器控制策略[J].电工技术学报,2012,27(11):62-68. Wang Gaolin,Yang Rongfeng,Li Gang,et al.Position sensorless control strategy of IPMSM based on high frequency signal injection[J].Transactions of China Electrotechnical Society,2012,27(11):62-68. [10]王高林,张国强,贵献国,等.永磁同步电机无位置传感器混合控制策略[J].中国电机工程学报,2012,32(24):103-109. Wang Gaolin,Zhang Guoqiang,Gui Xianguo,et al.Hybrid sensorless control strategy for permanent magnet synchronous motors[J].Proceedings of the CSEE,2012,32(24):103-109. [11]佘致廷,袁俊波,郑勇,等.交互式模型参考自适应PMSM 速度辨识[J].电气传动,2011,41(3):3-7. She Zhiting,Yuan Junbo,Zheng Yong,et al.Speed identification of permanent magnet synchronous motor based on MRAS[J].Electric Drive,2011,41(3):3-7. [12]胡维昊,王跃,李明烜,等.基于MRAS 的多相永磁直驱型风力发电系统无速度传感器控制策略研究[J].电力系统保护与控制,2014,42(23):118-124. Hu Weihao,Wang Yue,Li Mingxuan,et al.Research on sensorless control strategy of direct drive multi-phase PMSG wind power generation system based on MRAS[J].Power System Protection and Control,2014,42(23):118-124. [13]黄科元,周李泽,周滔滔,等.一种增强可靠性的永磁同步电机初始角检测[J].电工技术学报,2015,30(1):45-50. Huang Keyuan,Zhou Lize,Zhou Taotao,et al.An enhanced reliability method for initial angle detection on surface mounted permanent magnet synchronous motors[J].Transactions of China Electrotechnical Society,2015,30(1):45-50.
2016, Vol. 31 
