摘要
基于直接转矩控制算法的基础上,分析了三相异步电机的数学模型,介绍了直接转矩控制算法各部分的原理,得出利用滞环比较器正确选择电压空间矢量的方法。通过对传统直接转矩控制方法中转矩脉动问题的分析,研究了有效减小转矩脉动的方法。选用基于空间电压矢量脉冲宽度调制的直接转矩控制算法(TDC-SVPWM)减小转矩脉动,并介绍了该算法的原理。通过Matlab中的Simulink模块,分别搭建传统直接转矩控制(TDC)系统和基于电压空间矢量脉冲宽度调制(SVPWM)的直接转矩控制系统的仿真模型,对比两者的仿真结果,进一步验证了改进后的直接转矩控制系统对改善电磁转矩脉动的有效性。
Based on direct torque control algorithm,mathematical model of three-phase asynchronous motor is analyzed.The principle of each part of direct torque control algorithm is introduced.The method of choosing voltage space vector correctly by hysteresis comparator is obtained.By analyzing the torque ripple problem of traditional direct torque control method, the effective method of reducing torque ripple is studied.Direct torque control algorithm based on space voltage vector pulse width modulation(SVPWM)is adopted to reduce torque ripple, the principle of the algorithm is introduced.By Simulink module in Matlab,simulation models of traditional direct torque control system and direct torque control system based on voltage space vector pulse width modulation are set up respectively.By comparing the simulation results of these two systems,the effectiveness of the improved direct torque control system in improving the electromagnetic torque ripple is further verified.
作者
金爱娟
徐峥鹏
王居正
田晓雯
鲍思源
陶伟涵
Jin Aijuan;Xu Zhengpeng;Wang Juzheng;Tian Xiaowen;Bao Siyuan;Tao Weihan(University of Shanghai for Science and Technology,College of Photoelectric Information and Computer Engineering,Shanghai,200093,China;University of Shanghai for Science and Technology,Mechanical College,Shanghai,200093,China)
出处
《石油化工自动化》
CAS
2019年第2期23-29,共7页
Automation in Petro-chemical Industry
基金
国家自然科学基金项目:临近空间高超声速飞行器低复杂度再入姿态控制器设计研究(项目号:11502145)
关键词
三相异步电机
直接转矩控制
空间矢量脉冲宽度调制
triple-phase asynchronous motor
direct torque control
space voltage vector pulse width modulation
