初级永磁型直线电机矢量控制对比研究

Comparative Study on Vector Control of Primary Permanent Magnet Linear Motor

目前针对初级永磁型直线电机的控制系统研究,经验不足且缺乏有效的控制方法,而矢量控制技术取得了快速发展,控制策略灵活多样。为此,文中在分析初级永磁型直线电机数学模型的基础上,设计基于电流滞环PWM和基于空间矢量脉宽调制(SVPWM)的初级永磁型直线电机控制系统,对比两种矢量控制策略对其控制效果。通过Matlab/Simulink仿真表明了采用基于SVPWM的矢量控制,不仅使系统更加稳定地工作,提高了系统动态响应时间,而且对推力波动具有较为明显的抑制效果。

In order to study the control system of the primary permanent magnet type linear motor,the lack of experience and the lack of effective control method,the vector control technology has made rapid development and the control strategy is flexible and diverse. Based on the analysis of the mathematical model of the primary permanent magnet linear motor,the design of the primary permanent magnet linear motor control system based on the current hysteresis PWM and the space vector pulse width modulation（ SVPWM） is compared with the two vector control strategy pairs Its control effect. Simulation of Matlab/Simulink shows that the vector control based on SVPWM not only makes the system work more stably,improves the dynamic response time of the system,but also has the obvious effect on the thrust fluctuation.