矩阵变换器输出波形畸变分析及改善方法  

Analysis of Output Waveform Distortions of Matrix Converter and Compensation Method

作　　者：何必[1] 林桦[2] 佘宏武[2] 王兴伟[2] 张晓锋[1] 

机构地区：[1]海军工程大学电气与信息工程学院,湖北省武汉市430033 [2]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2010年第12期28-35,共8页Proceedings of the CSEE

基　　金：湖北省自然科学基金项目(2009CDB413)~~

摘　　要：矩阵变换器在低频低调制比输出时输出波形畸变较为严重,目前还没有文献较全面地分析其原因和补偿方法。对影响矩阵变换器输出波形畸变的原因进行分析,认为输出波形畸变是由多种因素造成的,主要包括窄脉冲、换流延时和管压降等。针对影响输出波形畸变的主次要因素,提出相应的改进方法,提出直接时间补偿方法以抵消换流延时带来的波形畸变;在极低调制比输出时,对管压降进行前馈补偿。实验证明,采用本文所提出的方法,较好地解决了输出电压波形畸变的问题,提高了矩阵变换器的运行性能。Waveform distortions become more serious when the modulation index of matrix converter is very low. There is less literature to analysis this problem and compensation method comprehensively. It is researched that short PWM pulses, commutation delay and device voltage drop are the general causations. Analysis and compensation method of waveform distortions were discussed. Pulse compensation was used to bucking the affect of commutation delay and feedforward compensation control was also selected in very low modulation index. Experimental results show that the proposed method reduces waveform distortions and improve the operation performance of matrix converter.

关 键 词：矩阵变换器 空间矢量调制法 换流延时 管压降 补偿 

分 类 号：TM46[电气工程—电器]