摘要
脉宽调制信号作用于矩阵变换器,输出电压中不可避免地会产生高频共模信号,对负载及周围电气设备产生较大危害。分析了双线电压合成策略下矩阵变换器在单位开关周期内共模电压的瞬时值。针对矩阵变换器特有的4步换流过程,定量分析换相延时对共模电压的影响。采用优化零输出状态的方法降低共模电压最大瞬时值,降幅可达到42.3%,有效减小矩阵变换器共模电压的负面效应,同时该方法受换流过程影响引起的共模电压变化量较小。通过样机实验,证明了优化零输出状态方法的可行性和有效性。
The use of PWM signals acting on the matrix converter will cause high-frequency common mode voltage （CMV） inevitably, which would have a great harm to the load and the electrical equipments. The instantaneous value of CMV in the switching period for matrix converter under the double line voltage strategy was analyzed. Aiming at the particular four-step commutation of the matrix converter, the delay effect of commutation on the CMV was analyzed. By choosing the input phase of zero output voltages combination accurately, the proposed method can reduce the mount of CMV by d2.3%.Accordingly, adverse effects of CMV are eliminated to a degree. Furthermore, the CVM variation of the proposed method is less impressed with the commutation. Experiments with a prototype are carried out. The results are given to verify the feasibility and effectiveness of the proposed method.
出处
《电气传动》
北大核心
2013年第6期47-52,共6页
Electric Drive
基金
国家自然科学基金(51077097)
关键词
矩阵变换器
共模电压
双线电压合成
4步换流
matrix converter
common mode voltage
double line voltage synthesis
four-step commutation
