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Auxiliary transformer FB-ZVZCS-PWM inverter arc welding power supply
Author(s): 
Pages: 9-12
Year: Issue:  9
Journal: TRANSACTIONS OF THE CHINA WELDING INSTITUTION

Keyword:  软开关逆变弧焊电源;
Abstract: 现有FB-ZVZCS-PWM软开关弧焊逆变电源采用阻断电容衰减原边环流电流所需的时间与占空比有关,占空比很小(电源输出电压很低)时滞后臂难以实现零电流开关.采用原边辅助变压器衰减原边环流电流所需的时间不受占空比影响,而与原边峰值电流成正比.文中介绍了采用原边辅助变压器、有限双极性控制的新型FB-ZVZCS-PWM软开关弧焊逆变电源实现超前臂零电压开关和滞后臂零电流开关的工作原理.计算机仿真和试验结果表明,根据最大峰值电流值设计适当的辅助变压器变比,可以在各种负载条件下实现软开关.
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