一种可靠换流的双级矩阵变换器载波调制策略  

A Carrier-Based Modulation Strategy of Two Stage Matrix Converter with Reliable Commutation

作　　者：齐琛[1] 陈希有[1] 

机构地区：[1]大连理工大学电气工程学院,大连116024

出　　处：《电工技术学报》2013年第6期184-191,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50877007)

摘　　要：为了提高双级矩阵变换器(TSMC)换流可靠性,提出了一种新的基于载波的调制策略。整流级采用双调制波来延长整流级零电流换流时间,解决了因窄脉冲导致换流失败和输入电流畸变的问题。逆变级采用60°开关钳位的调制函数作为调制波,减少了逆变级1/3倍的换流次数。协同调制时,整流级在相邻两个载波周期内以等腰三角波作为载波,逆变级在每个载波周期内以梯形波作为载波,保证载波周期过渡前后开关状态一致,分别消除了整流级和逆变级在载波周期过渡时的换流过程,进一步提高换流可靠性。分析了整流级最小换流时间与逆变级调制系数之间的关系。最后,建立TSMC实验样机,与现有的两种载波调制策略进行了对比,验证了本文策略的正确性及优越性。To improve the reliability of commutation in two stage matrix converter （TSMC）, a novel carrier-based modulation scheme was proposed. In rectifier, the double modulation waves were used to extent zero current commutation time, so the problems of interruption of commutation and distortion in input current caused by narrow pulses were solved. In inverter, the 60° clamped modulation functions were taken as modulation waves to reduce the counts of commutation by one third In cooperating modulation, the isosceles triangular waves during two adjacent carrier periods and the trapezoidal waves in one carrier period were respectively taken as carrier waves of rectifier and inverter to keep switching states same, so that the commutation processes in a period of transition from one carrier period to another were avoided and the reliability was enhanced more. The relationship between minimum commutation time of rectifier and modulation index of inverter was also analyzed. At last, an experimental prototype was designed. Experimental results compare with two existing carrier-based modulation strategies to verify the correctness and superiority of proposed modulation strategy.

关 键 词：双级矩阵变换器 载波调制 简化换流 可靠性 窄脉冲 

分 类 号：TM46[电气工程—电器]