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Study of safety operation of AC resistance spot welding system

机译:交流电阻点焊系统安全运行研究

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摘要

This study deals with the safety operation of AC resistance spot welding (RSW) system. The input of the RSW system is the firing angle of the silicon-controlled rectifier (SCR) during each control cycle. Wrongly choosing a firing angle may induce disastrous consequence. The range of firing angle depends on the system's power factor angle; the relation between the firing angle, power factor angle and conduction angle is highly non-linear. After comparing three methods, a simple mathematical model is proposed in this study to facilitate the online calculation of the power factor angle and selection of the proper firing angle, so that the safety operation of RSW system can be guaranteed. In this condition, the RSW machine can work at the machine's the most capacity, the calculated value of power factor angle should be the lowest limit for actual selected firing angle of SCR. Finally, experimental results confirmed the effectiveness of the proposed mathematical model.
机译:这项研究涉及交流电阻点焊(RSW)系统的安全运行。 RSW系统的输入是每个控制周期内可控硅整流器(SCR)的触发角。错误选择点火角度可能会导致灾难性后果。触发角的范围取决于系统的功率因数角。点火角,功率因数角和传导角之间的关系是高度非线性的。通过对三种方法的比较,提出了一种简单的数学模型,以方便在线计算功率因数角和选择合适的点火角,从而可以保证RSW系统的安全运行。在这种情况下,RSW机器可以在机器的最大容量下工作,功率因数角的计算值应为SCR实际选择的点火角的最低极限。最后,实验结果证实了所提数学模型的有效性。

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  • 来源
    《Power Electronics, IET》 |2014年第1期|141-147|共7页
  • 作者

    Kang Zhou; Lilong Cai;

  • 作者单位

    Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China|c|;

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  • 原文格式 PDF
  • 正文语种 eng
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