| Principle analysis and electromagnetic design of half－bridge commutating circuit for thyristor arc welding inverter |
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| 引用本文： | LI Zhongyou, LI Qiaomin, YANG Min, LI Qingbin and YANG Youli(Welding Department. Shandong University of Technology. Ji'nan. 250014). Principle analysis and electromagnetic design of half－bridge commutating circuit for thyristor arc welding inverter[J]. 中国焊接, 1996, 0(1) |
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| 作者姓名： | LI Zhongyou LI Qiaomin YANG Min LI Qingbin and YANG Youli(Welding Department. Shandong University of Technology. Ji'nan. 250014) |
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| 摘 要： | Ｐｒｉｎｃｉｐｌｅａｎａｌｙｓｉｓａｎｄｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｄｅｓｉｇｎｏｆｈａｌｆ－ｂｒｉｄｇｅｃｏｍｍｕｔａｔｉｎｇｃｉｒｃｕｉｔｆｏｒｔｈｙｒｉｓｔｏｒａｒｃｗｅｌｄｉｎｇｉｎｖｅｒｔｅｒＬＩＺｈｏｎｇｙｏｕ；ＬＩＱｉａｏｍｉｎ；ＹＡ...
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Principle analysis and electromagnetic design of half-bridge commutating circuit for thyristor arc welding inverter |
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| LI Zhongyou, LI Qiaomin, YANG Min, LI Qingbin and YANG Youli. Principle analysis and electromagnetic design of half-bridge commutating circuit for thyristor arc welding inverter[J]. China Welding, 1996, 0(1) |
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| Authors: | LI Zhongyou LI Qiaomin YANG Min LI Qingbin YANG Youli |
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| Affiliation: | Welding Department. Shandong University of Technology. Ji'nan. 250014 |
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| Abstract: | A novel theory of the commutating process of half/bridge thyristor are welding inverter is presented. According to the characteristic of its typical primary current pulse, a commutating process can be divided into three stages. ie.. front-edge wave-head stage and back-edge stage.The equivalent circuits of each stage are presented respectively. For wave-head stage, the differential equation about the voltage across commutating capacitor has been set up with the initial condition of nonzero-current and nonzero-voltage. and its solutions are completely in accord with the practically measured waveforms. For front and back edge stages, the theory of current shifting on constant magnetic condition is introduced. The process, in which the inverse voltage across commutating capacitor is formed, and the rule, according to which the inverse voltage varies.are discussed. In addition. each. special operating state is studied carefully and a reasonable design state is determined. By T-type equivalent circuit in the design. state. the fundamental formulas for accurate engineering design are derived. Finally. two design cases are given. |
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| Keywords: | RLCU equivalent circuit current shifting inverse voltage forming design State |
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