基于真三相双向开关的降压交流电压控制器拓扑结构

M. R. T. Hossain, M. Faisal, M. A. Choudhury
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引用次数: 5

摘要

本文提出了一种基于双向开关的三相降压交流电压控制器。所提出的三相稳压器的工作原理是在降压变换器拓扑中使用两个三相双向开关的直接结果。变换器按相工作,因此在负载不平衡的情况下,三相输出电压保持不变。该拓扑结构减少了用于三相交流电压控制的开关数量,具有输出电压调节、输入电流整形和功率因数改善能力。开关数量减少,控制电路简单,开关损耗小,运行可靠,成本低。文中给出了该变换器开闭环控制的稳态分析和仿真结果。用于控制稳压器的电压模式反馈控制方法显示转换器输出电压的可接受调节。在负载或输入电压突然变化时,控制器调整占空比以恢复到所需的输出电压。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
True three-phase bidirectional switch based buck AC voltage controller topology
Two bi-directional switch based three-phase buck AC voltage controller is presented in this paper. The operational principle of the proposed three-phase regulator is a direct consequence of using two three-phase bi-directional switches in the buck converter topology. The converter works on per phase basis and therefore three phase output voltages remain same in case of load unbalance. The topology has reduced number of switches for a three-phase AC voltage control having output voltage regulation, input current shaping and power factor improvement capability. Reduced number of switches allows simple control circuit, less switching loss, reliable operation and low cost. Steady state analysis and simulation results of open and closed loop control of the proposed converter are presented in this paper. The voltage mode feedback control method used for controlling the regulator shows acceptable regulation of the converter output voltage. During sudden variation of load or input voltage the controller adjusts the duty cycle to recover to the desired output voltage.
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