多相并联LLC电压型谐振逆变电源控制与调节

目前,逆变电源的相移控制一般应用在单个逆变器中,而逆变电源容量的提高常采用多管并联或高频变压器并联的方式实现.提出了一种控制、调节逆变电源并提高其输出功率的新方法.该方法通过控制多个逆变器间的相移来有效控制和调节逆变电源的输出功率,同时通过多相并联电感一电感一电容(LLC)电压型谐振逆变器来提高逆变电源输出功率.推导出了不同相移控制下各相逆变器输出电流、输出有功功率及负载电流和电源效率的计算公式,并对不同相移时逆变器输出有功功率、无功功率和负载功率进行了仿真分析,同时设计了两相并联相移控制LLC电压型谐振逆变电源实验样机,进行了实验验证.仿真和实验结果表明,所提出的新方法能有效控制和调节逆变电源的输出功率,提高电源容量,简化功率调节过程,降低开关损耗,从而提高系统效率.

Control and Regulation of Multi-phase Parallel LLC Voltage-fed Resonant Inverters

Currently,phase-shift control is generally used in a sole inverter,while the output power capability of the inverter is usually enhanced by parallel connection of multiple transistors or high-frequency transformers.This paper proposes a novel approach to control and regulate the inverter output power by controlling the phase-shift between multi-inverters,and meanwhile to enhance the inverter capacity through parallel connection of multi-phase LLC voltage-fed resonant inverters.The expressions of output curr...