一种抑制Swiss整流器低频管启动电流的控制策略

A Starting-Up Strategy for Suppressing the Inrush Current of Low-Frequency Switches Based on Swiss Rectifier

Swiss整流器具有结构简单、易于控制、效率高等优点,广泛应用于数据中心、工业应用等场合。介绍了Swiss整流器的工作原理及电流矢量合成的机理,分析了低频管启动过程中冲击电流产生的机理,并提出了一种基于电网电压瞬时值的低频管优化启动策略,以抑制低频管内的冲击电流。该策略具有控制简单、抑制效果好、无须外部电路等优点。最终,搭建了一台5kW样机验证了所提策略的有效性。

Swiss rectifiers have the advantages of simple structure,easy control and high efficiency,and are widely used in data centers,industrial applications and other occasions.This paper introduces the working principle of Swiss rectifier and the mechanism of current vector synthesis,analyzes the mechanism of inrush current generation during the starting-up process of low-frequency switches,and proposes a starting-up strategy of low-frequency switches based on the instantaneous grid voltage to suppress the inrush current in the low-frequency switches.This strategy has the advantages of simple control,good suppression effect,and no external circuit.Finally,a 5 kW prototype was built to verify the effectiveness of the proposed strategy.