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晶闸管逆变式CO2弧焊电源电子电抗器的设计 总被引:3,自引:0,他引:3
本文基于电抗器对CO2弧焊电源动特性的影响,给出了晶闸管逆变式CO2弧焊电源电子电抗器的设计方法、实例和实验结果。使用这种电抗器,既能减小电源的体积和重量,又能有效地改善电源的动特性和焊接工艺性能。 相似文献
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双反星形全波整流电路在CO2焊机中的应用孙世国天津市焊接研究所(300110)近年来,在国内外的CO2焊机中,有很大部分的整流电路采用了带平衡电抗器的双反星形全波整流电路,图1是韩国朝兴电机产业株式会社的ES-350型焊机的整流电路图。图1在图1的电... 相似文献
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本文介绍了逆变C2气体保护焊机的电源动特性指标,分析了动特性指标对飞溅的影响.在不同电压、电流参数下进行焊接,测量焊接电压、电流波形,并收集了各种规范下的飞溅,分析了短路电流上升速度di/dt、短路电流峰值,Im、短路到燃弧电源电压恢复速度对飞溅的影响,实验表明短路峰值电流、电压恢复速度对飞溅有一定的影响;随着焊接电流的增大,短路电流上升率的减少,飞溅量显著上升;并指出瞬时短路是造成飞溅的重要原因,并论述通过调节电子电抗器电感可以获得各种规范下所需的电感值,从而使逆变C2气体保护焊机具有良好的电源动特性,以减少C2焊接飞溅. 相似文献
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0IntroductionCompared with conventional arc welding machine,arcwelding inverter has many advantages such as faster re-sponse,small volume,lightquality,high efficiency and soon,so it is used more and more widely.But,at present,most of the power switching d… 相似文献
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Pulsed MIG welding is suitable for aluminum alloys welding, because spray transfer and excellent profile can be arrived during whole welding current range, and the energy of droplet can be controlled to overcome losing of alloy elements with lower melting and steam point by controlling pulse current and pulse time. Because of the special physic properties of aluminum alloys, there are different requirements for pulsed MIG welding between starting arc short circuit and drop transfer short circuit, pulse period and base period. In order to satisfy the need of aluminum alloys MIG welding, self-adjusting dynamic characteristics are designed to output different dynamic characteristics in different welding startes. The self-adjusting dynamic characteristics of pulsed MIG welding are achieved through a short circuit controller and a dynamic electronic inductor. The welding machine(AL-MIG 350) with self-adjusting dynamic characteristics has a high rate of successfully starting arc up to 96%, and the short circuit time during transfer is less than 1ms, in the mean time, the arc is stiffness, spatter is low and weld appearance is good. 相似文献
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铝合金在高速列车制造中,占有很重要的地位。铝合金因其独特的时有特殊的要求。本文研制的脉冲MIG焊机,主电路采用大功率晶体管作为主控元件,从铝合金MIG焊特点出发,采用电流脉冲技术控制铝合金MIG焊熔滴过渡行为,在整个焊接电流范围内,均得到小滴流过渡,电弧挺度好,熔滴过渡均匀。脉冲参数采用一元化调节,操作方便,只要给定送比脉冲参数由焊机内部自动产生,实现了自适应控制。铝合金MIG焊在不同的状态有不同 相似文献
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对于逆变弧焊电源,采用基于 DSP 的全数字控制策略.针对短路过渡 CO2 气体保护焊特点,提出了准恒压全数字化新型波形控制策略,不再根据输出电压区分短路和燃弧过程,使得短路和燃弧过程过渡自然,适应于所有的焊接工艺,提高了系统的适应性.同时在短路初期采用瞬态电流抑制技术减少了飞溅,建立了包含实时燃弧能量补充机制的全数字化电压电流瞬时反馈的全数字三闭环控制模型.结果表明,所提出的全数字化软开关控制策略灵活、可靠;所采用的数字波形控制技术适应性好、灵活、焊接过程稳定、焊缝成形优良.Abstract: According to the characteristics of short circuit transfer of CO2 gas metal arc welding, a novel full digital waveform control scheme called quasi-constant voltage control is presented for inverter type arc welding power based on DSP. Short circuit and arc ignition process are not judged according to the output voltage and transfer process between them is smooth. The strategy is also applied to all welding conditions. Initial current at the instant of short-circuit is suppressed to reduce spatter generation. A triple closed loop control model including real time energy compensation for the arc state based on instantaneous voltage and current feedback control is estabhshed. Flexibility and reliability of the proposed fully digitalized softswitching control strategy is validated by experimental results of 400 A welding machine. The experimental results show that proposed digital waveform control scheme is applicable for different wire feeding speed conditions, and the welding process is stable and the welding bead appearance is good. 相似文献
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IGBT逆变式波形控制CO2弧焊电源的研究 总被引:7,自引:2,他引:5
本文针对IGBT弧焊逆变器,提出并实现了适于短路过渡CO_2气体保护焊的输出波形控制方法。对焊接电弧参数实时采样以及工艺试验均表明,所研制的逆变式波控CO_2弧焊电源对减小金属飞溅和改善焊缝成型均有明显效果。 相似文献