永磁同步电动机无位置传感器滑模变结构控制  

Sliding Mode Variable Structure Control for Sensorless PMSM

作　　者：万健如[1] 郭永林[1] 程传更[1] 

机构地区：[1]天津大学电气与自动化工程学院,300072

出　　处：《电气应用》2006年第8期75-78,共4页Electrotechnical Application

基　　金：天津市基金项目(05YFJMJC11500)

摘　　要：永磁同步电动机矢量控制通常用传感器检测转子转速和位置,优点是测量精度高,但易使系统鲁棒性降低、转子轴转动惯量增大,且硬件成本增加。通过检测电动机相电流,转化到α-β坐标系,根据电动机电磁方程式构造滑模变结构观测器,得到转子转速和位置的估算值。理论分析和仿真实验表明,滑模变结构预估算法具有较快的速度估算收敛性和较好的抗负载扰动能力,系统鲁棒性增强。Sensor is usually used in permanent magnet synchronous motor （ PMSM ） vector control system to measure the velocity and position of rotor. It has high measuring precision, but it also brings some drawbacks such as low robustness, big moment of inertia and high cost of hardware, the sensorless control method isadopted. First we measure the phase currents which are transformed under the α-β coordinates, then design the sliding mode variable structure observer based on the motor＇s electromagnetic equations to estimate the rotor＇ s velocity and position. Theoretical analyses and simulation results indicate that the method has faster constringency of velocity estimation and better ability on resisting the disturbances of load, so it can improve the robustness of the system.

关 键 词：滑模变结构 永磁同步电动机 无位置传感器 相电流 

分 类 号：TM341[电气工程—电机]