一种三相ZCT软开关逆变器的新型控制策略  

Study on control strategy for a three-phase ZCT soft switching inverter

作　　者：王小峰[1] 梁中华[1] 王鑫[1] 

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110023

出　　处：《沈阳工业大学学报》2003年第5期420-422,共3页Journal of Shenyang University of Technology

摘　　要：提出了一种三相ZCT逆变电路的新型软过渡控制策略.该策略通过对负载电流方向的判别决定开关模式和器件的开关时间.与其它一些ZCT控制策略相比较,二极管反向恢复电流和开关器件的开通损耗显著减小,辅助开关器件上的电流和热应力也得到了较好的分配.而且,每相的动作都相互独立,因此,对脉宽调制(PWM)控制的适应性很强.This paper proposes a new soft-transition control strategy for a three-phase zero-current-transition (ZCT) inverter circuit.The proposed strategy is realized by determining the switching patterns and timings of these four switches in compliance with the load current information.Compared with existing ZCT strategies,the diode reverse recovery current and switching turn-on loss are substantially reduced,the current and thermal stresses in the auxiliary devices are evenly distributed.Meanwhile,the soft transition for each phase is executed independently from the main controller.So any PWM scheme developed for hard-switching inverters is applicable.

关 键 词：软开关 三相逆变器 零电流过度 零电压过渡 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]