一种零电压零电流倍流整流弧焊逆变器  

A zero-voltage and zero-current welding inverter with current doubler rectifier

作　　者：陈延明[1] 吴慧芳 曹彪[2] 王志强[2] 

机构地区：[1]广西大学电气工程学院,南宁530004 [2]华南理工大学电子学院,广州510640

出　　处：《焊接学报》2007年第6期21-24,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金项目(50567001);国家科技型中小企业创新基金(03C26224500661)

摘　　要：采用移相控制和倍流整流技术,实现零电压零电流开关全桥变换和整流二极管软开关弧焊逆变器。其中超前桥臂实现零电压开通,滞后桥臂实现零电流关断,副边整流二极管,实现零电流自然关断,整个弧焊逆变器所有的功率器件都工作在软开关状态。降低了功率器件的应力与开关损耗,降低了干扰,提高了弧焊逆变器的电磁兼容性能力,特别适合大功率场合;并且可以进一步提高开关频率,加快系统动态响应能力。文中还简单讨论了软开关范围和参数的关系。在此基础上,制作2 kW弧焊逆变器,结果表明,该弧焊逆变器的良好性能。A full-bridge with zero-voltage and zero-current switching(ZVZCS) PWM DC-DC welding inverter by employing phase-shift and current-doubler-rectifier is presented.The zero-voltage turn-on was achieved for the leading-leg of the converter,and zero-current turn-off was achieved for the lagging-leg,and the rectifier diodes in the secondary side were turned off naturally.All the power semiconductors in the converter were operated with soft-switching condition.Hence the switching stresses,losses and interferes were reduced,and electromagnetic compatibility is improved.It is especially suitable for the high power output applications.The switching frequency can be increased,and the dynamic response can be improved.The soft-switching operating range and the design considerations were discussed.Finally,a 2 kW welding inverter was designed,and the experimental results show its the good performances.

关 键 词：弧焊逆变器 移相控制 零电压开关 零电流开关 倍流整流 

分 类 号：TM46[电气工程—电器]