摘要
永磁同步电机的无传感器控制在低速区域或零速常采用高频信号注入法。旋转高频信号注入法辨识转子位置,其准确度易受到控制器采样和计算延时、逆变器输出或波形畸变引起的延时,以及信号解调过程中滤波器环节产生的延时等因素的影响。该文在理论推导和详细分析转子位置偏差原理的基础上,提出可把延时产生的相位偏差归结为两种类型分别加以分析和补偿。在此基础上提出一种转子位置误差补偿高频信号注入控制策略。该策略能有效减小信号延时造成的相位偏离,提高转子位置的估计准确度。由于引起转子位置偏离值的各种延时可能随时间和实际参数是不断变化的,而所提出的策略具有在线计算实时补偿的特点,因而能较好地提高转子位置在线检测精度。实验验证了理论分析的正确性和策略的有效性。
Sensorless control of permanent magnet synchronous motor(PMSM)is usually based on high frequency signal injection at low speed or zero speed.The rotation high frequency injection method identifies the rotor position,but its accuracy is easily affected by the controller sampling and calculation delay,the inverter output and waveform distortion delay,and the delay of the filter during the signal demodulation.On the basis of theoretical deduction and analysis of rotor position deviation,this paper proposes that the phase deviations produced by signal delay can be divided into two types for analysis and compensation.Subsequently,a control strategy for rotating high frequency signal injection is proposed.This strategy can effectively reduce the phase deviation caused by signal delay and improve the accuracy of rotor position estimation.The delay caused by rotor position deviation is changing with time,and the proposed strategy has the characteristics of on-line computation and real-time compensation.Therefore,the on-line detection accuracy of rotor position can be improved.Experiments verify the correctness of the theoretical analysis and the effectiveness of the strategy.
作者
郭磊
杨中平
林飞
Guo Lei;Yang Zhongpin;Lin Fei(School of Electrical Engineering Beijing Jiaotong University,Beijing 100044 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第21期4458-4466,共9页
Transactions of China Electrotechnical Society
基金
国家科技部“十三五”重点研发计划资助项目（2016YFB1200506-18）
关键词
永磁同步电机
高频信号注入法
相位偏差
转子位置误差补偿
无传感器控制策略
Permanent magnet synchronous motor(PMSM)
high frequency signal injection method
phase deviation
rotor position error compensation
sensorless control strategy
