模块化多电平变频驱动系统的转矩脉动最小化控制  

Torque Ripple Minimization Control for Modular Multilevel Converter Driven System

作　　者：韩晓燕[1] 郭亚男[1] 刘秀敏[1] HAN Xiaoyan GUO Yanan LIU Xiumin(College of Information ＆ Business, Zhongyuan University of Technology, Zhengzhou 450007, Chin)

机构地区：[1]中原工学院信息商务学院,河南郑州450007

出　　处：《电机与控制应用》2017年第9期88-93,99,共7页Electric machines & control application

基　　金：河南省重点科技攻关项目(152102210155)

摘　　要：应用基于两电平变频器的传统感应电机驱动系统存在输出转矩脉动较大的问题。针对这个问题,设计了一种模块化多电平变频器驱动的多极感应电机转矩脉动最小化控制方案。基于多极感应电机设计了其多电平驱动变频器拓扑,并采用了一种单极性的载波移相空间矢量脉宽调制技术进行控制。通过脉冲序列生成分析和计算,系统的低次输出谐波都达到了开关频率的四倍频以上,进而有效降低了转矩脉动。基于模块化多电平变频器的多级感应电机驱动试验平台进行了对比试验研究,试验结果验证了在新型控制策略下的有效性,电机转矩脉动得到了明显改善。The conventional induction motor driven system which was equipped with two-level converter had the problem of large torque ripples. Aiming at it,a torque ripple minimization control for multi-pole induction motor driven by modular multilevel converter was proposed. The modular multilevel drive converter topology was designed based on the multi-pole induction motor,and a unipolar carrier phase shifted SVPWM technique was adopted for the controller. Through the analysis and calculation of pulse sequence generation,all low order harmonics achieve four fold frequency of switching frequency,and then minimize the torque ripples. The experimental research had been carried out based on multi-pole induction motor drive test platform with modular multilevel converter. The test results verified the effectiveness of the new control strategy,and the torque ripple of the motor was improved obviously.

关 键 词：感应电机 模块化多电平 变频器 转矩脉动 载波移相 

分 类 号：TM346[电气工程—电机]