一种新型的三相交流稳压电源

A Novel Three Phase AC Source With Output Voltage Variable Continuously and Regulated

在分析了现有的三相交-交变压电源后,提出了一种新颖的三相交-交变压和稳压方法,该方法借助于三相电子开关,将直流电压变换原理应用到三相交流的变压、稳压中,克服了使用传统晶闸管调压电路带来的功率因数低和谐波污染问题.与使用串联补偿构成的三相调压电路相比该电路具有简单,电压调节范围大等优点.在描述了系统的构成、工作原理和数学模型后,对该电源系统的控制策略作了简要分析和说明,最后给出了电源系统的仿真结果和在样机上的实验结果.

A new kind of three-phase ac-ac converter with regulated output voltage or with output voltage variable continuously has been proposed. Cuk circuit, normally used in dc-dc voltage conversion, is employed in this converter with the help of three-phase electrical switches. Compared to the traditional ac-ac converter employ thyristors to regulate ac power, i.e. phase-controlled ac-ac converters, and existing line conditioners, this converter is smaller in size, higher in efficiency, less low-order in harmonics and larger in voltage adjustable range. The analysis of operating principle and control strategy of the proposed topologies are presented. Computer simulation and experimental resuh of the converter are also presented at the end of the paper.