大型望远镜的弧形电机建模与控制仿真

常九健; 马文礼

光电工程, 2010, 37 (9): 74, 网络出版: 2011-01-05

大型望远镜的弧形电机建模与控制仿真

Modeling and Control Simulation of Arc PMSM Used on Large Telescope

论文大纲

常九健 ^1,2,*马文礼 ¹

作者单位

¹ 中国科学院光电技术研究所，成都 610209

² 中国科学院研究生院，北京 100039

大型望远镜弧形电机力矩波动控制模型 large telescope Arc PMSM thrust ripple SVPWM SVPWM control model

摘要

21 世纪初，针对大型天文望远镜传动特点，研制开发了适用于大型天文望远镜的弧形电机拼接的直接传动方式。这种传动方式有诸多的优点，但是存在较大推力波动，这将直接影响望远镜的跟踪精度。针对该种传动方式的缺点，本文采用空间电压矢量脉宽调制(SVPWM)的方法对电机进行控制，采用Matlab/Simulink 建立了弧形电机的仿真模型和矢量控制系统的仿真模型。仿真结果表明，电机在带负载的情况下，可以获得快速的动态响应和平稳的水平推力，三相电流接近理想的正弦波形，从而使电机得到平稳的速度和推力，保证了电机的运行性能，满足望远镜跟踪需求。

Abstract

At the beginning of 21st century, a new method of driving for large telescope was developed, which was based on Arc PMSM (Arc Permanent Magnet Synchronous Motor). This method has many advantages over other traditional drive methods, on the other hand there is a problem of thrust ripple, which will affect the tracking precision of the telescope. In order to solve the problem of thrust ripple, which will affect the tracking precision of the telescope, a control method based on the principle of Space Vector PWM (SVPWM) was introduced. A model of Arc Permanent Magnet Synchronous Motor (PMSM) was built up under the condition of Matlab/Simulink. And SVPWM method was adopted to construct Arc PMSM control model which contained velocity and current control loops. Simulation results show that the motor with the load can get a fast dynamic response and ideal three-phase sine wave current. The speed andthrust are smooth, and the thrust ripple is smaller than 5%, so this control method can meet the needs of the trackingrequirement of the large telescope.

参考文献

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常九健, 马文礼. 大型望远镜的弧形电机建模与控制仿真[J]. 光电工程, 2010, 37(9): 74. CHANG Jiu-jian, MA Wen-li. Modeling and Control Simulation of Arc PMSM Used on Large Telescope[J]. Opto-Electronic Engineering, 2010, 37(9): 74.

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