基于死区补偿的PMSM转矩脉动抑制研究  

Research on Torque Ripple Suppression of PMSM Based on Dead-time Compensation

作　　者：张志刚[1] 李腾 杜劭琨 陈柯安 曾泓锦 ZHANG Zhi-gang;LI Teng;DUShao-kun;CHEN Ke-an;ZENG Hong-jin(Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China;The Fourth Branch of Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014000,China)

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054 [2]内蒙古第一机械集团有限公司第四分公司,内蒙古包头014000

出　　处：《控制工程》2021年第6期1108-1114,共7页Control Engineering of China

基　　金：国家自然科学基金资助项目(51205432);重庆市基础科学与前沿技术研究专项资助项目(cstc2017jcyjAX0143);重庆市重点产业共性关键技术创新专项资助项目(cstc2017zdcy-zdzxX0008);重庆市重点产业共性关键技术创新专项资助项目(cstc2015zdcy-ztzx60013)。

摘　　要：针对死区效应导致永磁同步电机相电流畸变,造成转矩脉动的影响,提出一种基于平均误差电压分解为静止轴系反馈补偿电压的方法,通过分析死区时间和开关元件通态压降对相电流的影响,推导出死区补偿时间和补偿电压表达式。为了提升相电流极性判断的准确性,利用卡尔曼滤波去除d-q旋转轴系下的电流高次谐波,重构三相电流来判断静止轴系所处扇区来确定需要施加的补偿电压。仿真和试验结果表明,该方法能减弱相电流高次谐波,改善相电流正弦度,降低转矩脉动。The dead-time effect can lead to current distortion and torque ripple in the permanent magnet synchronous motor(PMSM)control.Aiming at the problem,the method based on the decomposition of the average error voltage into the static axis feedback compensation voltage is proposed.By analyzing the influence of the dead-time and the on-state voltage drop of power switches on the current,the expressions of dead-time compensation time and compensation voltage are derived.In order to improve the polarity determination accuracy of the phase current,high-order harmonics of current under d-q rotating shaft system are removed by Kalman filter.The three-phase current is reconstructed to determine the sector where the current vector located.The compensation voltage can be defined according to the sector.The simulation and experimental results show that the method can not only weaken the high-order harmonics of the phase current,but also improve the sine degree of the phase current and reduce the torque ripple.

关 键 词：永磁同步电机 死区补偿 卡尔曼滤波 

分 类 号：TM341[电气工程—电机]