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| 辅助变压器式FB-ZVZCS-PWM逆变弧焊电源 |
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方臣富1,2, 殷树言1, 侯润石2, 温永平2, 于明2, 李俊3
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1.北京工业大学机电学院, 北京 100022;2.江苏科技大学材料学院, 江苏 镇江 212003;3.凯尔达电焊机有限公司, 杭州 310018
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| 摘要: |
| 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。 |
| 关键词: 软开关 逆变 弧焊 电源 |
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| 基金项目:浙江省高新技术研究项目(2002X1C034) |
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| Auxiliary transformer FB-ZVZCS-PWM inverter arc welding power supply |
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FANG Chen-fu1,2, YIN Shu-yan1, HOU Run-shi2, WEN Yong-ping2, YU Ming2, LI Jun3
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1.College of Mechanical Engineering & Applied Electronics Technology, Beijing Polytechnic University, Beijing 100022, China;2.School of Material Science and Engineering, Jiangsu University of Science and Technology, Jiangsu Zhenjiang 212003, China;3.Kaierda Electric Welding Machine Co. Ltd. , Hangzhou 310018, China
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| Abstract: |
| The decreasing time of free-wheeling current is relative to duty cycle in the exiting FB-ZVZCS-PWM soft-switching inverter arc welding power supply with the block capacitor,and it is hard to achieve zero current switching(ZCS) for lagging leg with low duty cycle.By adopting auxiliary transformer in the primary side of main transformer,the decreasing time of free-wheeling current is independent of duty cycle,which is proportion to the peak current in the primary side of main transformer.A new FB-ZVZCS-PWM soft-switching inverter arc welding power supply was introduced,which adopted the auxiliary transformer and limited bipolar control mode.The principles of realizing zero voltage switching(ZVS) for leading leg by capacitor and ZCS for lagging leg by auxiliary transformer were explained.Simulation and experimental results showed that the soft-switching could be realized under all loads as long as the auxiliary transformer was designed by the maximum peak current in the primary side of main transformer. |
| Key words: soft-switching inverter arc welding power supply |
