三电平逆变器的无速度传感器矢量控制系统  

Speed-sensorless vector control system based on the three-level inverter

作　　者：牛一川[1] 孙东[1] 

机构地区：[1]同济大学电子与信息工程学院,上海200092

出　　处：《应用科技》2012年第1期16-20,共5页Applied Science and Technology

摘　　要：介绍三电平逆变器的基本结构并推导了三电平空间矢量脉宽调制(SVPWM)原理,为防止电容中点电压的偏移,采用改进型SVPWM控制方法作为逆变器的控制策略.同时,引入模型参考自适应技术,并在三电平转速、磁链双闭环控制中使用该技术实现了无速度传感器控制.通过仿真结果证明了方法的正确性和可行性.The basic structure of the three-level inverter is introduced and the three-level space vector pulse width modulation （SVPWM） theory is derived. An improved SVPWM control algorithm is adopted as the control strategy for the inverter in order to compensate the neutral-point shifting. Besides, model reference adaptive system （MRAS） is researched and is applied to the three-level inverter in double closed-loop control of rotation speed and magnetic flux. Validity and feasibility related to this technique are proved through simulation results.

关 键 词：无速度传感器矢量控制 三电平逆变器 模型参考自适应系统(MRAS) 空间矢量脉宽调制(SVPWM) 

分 类 号：TM921.51[电气工程—电力电子与电力传动]