改进的永磁直线同步电机直接推力控制  

Improved Permanent Magnet Linear Synchronous Motor Direct Thrust Control

作　　者：王丽梅[1] 程兴民[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《组合机床与自动化加工技术》2015年第12期60-64,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(51175349);辽宁省高等学校优秀人才支持计划资助(LR2013006);沈阳市科技计划项目(F13-316-1-48)

摘　　要：针对传统直接推力控制系统响应慢和脉动大的问题,提出一种改进无传感器永磁直线同步电机直接推力控制方法,在定子磁链坐标系下建立电机模型,对推力和磁链进行解耦控制。根据推力和负载角的线性关系设计推力调节回路,将推力和磁链的误差作为PI控制器的输入,利用定子磁链矢量角把产生的正交参考电压分量进一步转化到固定参考系下,采用空间矢量调制代替传统的开关表生成所需的电压矢量。磁链负载角和动子速度由磁链的正交分量计算得出,不使用任何传感器。仿真结果表明,改进的直接推力控制可以得到快速、平滑的推力和磁链响应,提高了系统的控制性能,同时验证了无传感器方法的有效性。Aiming at the slow response and ripple problem of traditional direct thrust control system,the paper presents an improved direct thrust control method of permanent magnet linear motor w ithout rotor position and speed sensor. Establishing the motor model in the stator flux frame,decoupling control of thrust and flux linkage. Taking advantage of the linear relationship betw een the thrust and the load angle designing thrust control loop. Errors of thrust and flux as the PI controller input,to generate orthogonal reference voltage component and then making use of the stator flux linkage vector angle transforming them to a fixed reference frame,and the required voltage vector can be gotten from the space vector modulation instead of traditional sw itch table. Load angle and rotor flux velocity calculated from the orthogonal component of stator flux,do not use any position or speed sensor. The simulation results show that,improved direct thrust control can get a quick,smooth thrust and flux response,and the control performance of the system improved significantly. At the same time also proved to be effective w ithout position and speed sensor method.

关 键 词：永磁直线同步电机 直接推力控制 无传感器 SVPWM 脉动 

分 类 号：TH166[机械工程—机械制造及自动化] TG68[金属学及工艺—金属切削加工及机床]