三相Boost型AC/AC交流变换器的研究与实现

Research and Implementation of Three-phase Boost Type AC/AC Converter

详细分析了三相Boost型AC/AC交流变换器的工作原理及其控制策略。通过比较各相输出电压值的大小,并结合输出电乐误差放大信号与三角载波的比较结果,可确定各开关管的工作状态。在各自1/3基波周期内,三相Boost型AC/AC交流变换器可看成是两个独立的单相Boost型AC/AC交流变换器的组合。本文对三相Boost型AC/AC交流变换器进行了仿真研究,并研制了一台原理样机。仿真和实验结果验证了理论分析的正确性及控制策略的可行性。

The operation principle and control strategy of three-phase Boost type AC/AC converter were analyzed in detail. By comparing the value of the three-phase output voltages, and integrating with the comparative result of the error amplification signal of output voltage and the triangular carrier, the operation states of switches are determined. Between every one third fundamental period, three-phase Boost type AC/ AC converter can be regarded as the combination of two single-phase Boost type AC/AC converters. Three-phase Boost type AC/AC converter was simulated and a prototype was designed. The simulation and experimental results verified the correctness of the theory and the feasibility of the control strategy.