永磁同步电机电流扰动补偿无位置传感器控制  

Permanent magnet synchronous motor position sensorless control with current disturbance compensation

作　　者：吴建华[1] 吴航 WU Jian-hua;WU Hang(College of Electrical Engineering,Zhejiang University,Hangzhou 310000,China)

机构地区：[1]浙江大学电气工程学院,杭州310000

出　　处：《电机与控制学报》2020年第4期80-86,95,共8页Electric Machines and Control

基　　金：国家高技术研究发展计划(863计划)(2011AA11A101)。

摘　　要：电机负载扰动及参数变化等问题,会影响永磁同步电机无位置传感器控制中滑模观测器算法的电流计算值偏离实际值,进而影响转速和位置的准确估算。本文以小功率面贴式永磁同步电机为研究对象,提出一种采用电流扰动补偿的新型滑模观测器(CDC-SMO),通过构建带有扰动补偿电流与实际电流的误差状态方程,将扰动量和电流的微分项进行合并,构成等效扰动量以直接获得电流的误差,并用反正切函数替代理想滑动模态中的符号函数,实现带有电流扰动补偿的永磁同步电机无位置传感器控制,最后,利用李雅普诺夫稳定性判据证明了观测器的稳定性。仿真和实验表明,所提方法可以准确地估算永磁同步电机的转速和位置,有效提高无位置传感器控制的估算精度和抗干扰能力。For the sliding mode observer( SMO) algorithm in permanent magnet synchronous motor( PMSM) position sensorless control,the calculation of current and the speed and position estimated error of the motor are affected by load and motor parameter disturbance. This paper proposes a sliding mode observer with current disturbance compensation( CDC-SMO) by establishing the error state equation of actual current and the current with disturbance compensation for surface mounted permanent magnet synchronous motor,in which the error of current was obtained directly by combining the disturbance and current differential term to form a new equivalent disturbance. And the sign function was substituted with Arctan function to reduce chattering phenomena. The simulation and experiment results show the high adaptability of the speed and load changes and the effectiveness of the proposed position sensorless control.

关 键 词：永磁同步电机 无位置传感器控制 滑模观测器 电流扰动补偿 等效扰动量 抗干扰能力 

分 类 号：TM341[电气工程—电机]