软开关逆变式弧焊电源的设计  

The Design of Main Loop for Soft-Switching Inverter Arc Welding Power Source

作　　者：张光先[1] 邹增大[1] 尹海[1] 李思海[1] 

机构地区：[1]山东大学,济南250061

出　　处：《焊接学报》2002年第1期14-18,共5页Transactions of The China Welding Institution

摘　　要：软开关技术是解决逆变弧焊电源可靠性的核心技术。本文提出了一种新的软开关逆变弧焊电源的设计方案 ,该方案基本上可实现空载、短路、燃弧全负载范围内的软开关状态。本文分析了超前臂的关断功耗与并联电容之间的关系 ,串联电容及回路电感对环流期的电流变化的影响。并指出了滞后桥臂零电流关断区域 ,以及超前臂和滞后臂的零开通条件。在此基础上提出了引入无功电流分量解决空载及轻载时软开关失败问题的方案 ,以及几个主要谐振参数的设计方法。在实践中采用本方案表明 ,降低了开关应力及损耗 ,提高了整机可靠性 。Soft switching is the key technology to improve the reliability of inverter arc welding power.A new design of soft switching inverter arc welding power is proposed in this paper.The soft switching state of any load,such as unloading,short circuiting and arcing,can be primarily realized by the design.The paper analyses the relation between the parallel capacities and the shutting loss of the leading arm,the effect of the serial capacities and the inductance of the loop impact on the change of current during the circumfluence time,the zero current shutting extent of the lagging arm and the ZVS,ZCS condition of the leading arm devices and lagging arm devices.In order to solve the problem that the soft switching will fail during unload or light load peried,the anthors put forward a layout introducing no power current sect and several primary resonant parameters.Practice shows that the design reduces the switching stress and loss,improves the reliability of the whole machine and reduces the cost of the arc welding power.

关 键 词：软开关 弧焊电源 逆变焊机 设计 

分 类 号：TG434[金属学及工艺—焊接]