共查询到18条相似文献,搜索用时 109 毫秒
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中频逆变式脉冲引弧器的研究 总被引:2,自引:2,他引:0
介绍了一种用逆变方式和倍压流方式构成的中频逆变式引弧器,并对其工作原理及参数设计进行了分析。试验表明该装置体积小,质量轻,引弧能力强,实现了无火花放电器引弧。 相似文献
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介绍钨极氩弧焊高压脉冲引弧电路的原理、特点、元件参数值的选取计算方法。采用倍压整流增压,去掉了升压变压器,致使脉冲引弧装置体积小,成本低。文中还对引弧脉冲电压的高低同发生火花放电的弧隙长领之间的关系,进行了定量试验研究,为设计本电路提供了参考数据。 相似文献
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介绍的新型电子高频引弧器,采用了晶体管逆变升压技术,使引弧器有重量轻,体积小,引弧快速可靠,成本低的特点,详细地分析了引弧器的工作原理,并给出了研制及试验结果。 相似文献
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用于逆变焊机的几种高频引弧器设计 总被引:4,自引:0,他引:4
对几种非接触式引弧器进行了比较.着重介绍了3种设计新颖的引弧器的工作原理。这些引弧器的应用对于提高逆变焊机的引孤性能、可靠性等有较大的益处。 相似文献
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介绍了无外电源轻便引弧器的组成部分及工作原理。该引弧器引弧迅速可靠,对高频主电路实现无触点切断,单独使用时,将其串联在电焊机把线与氩弧焊枪之间即可实现非接触引弧。 相似文献
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无外加电源高压脉冲引弧器的研制 总被引:1,自引:1,他引:0
对无外加电源高压脉冲引弧器的电路组成、工作原理及参数设计进行了分析。该引弧器无需外接电源,单独使用时可串接在直流焊机与焊枪之间,采用中频变压和晶闸管高压脉冲电路使其体积减小。实验表明:电磁干扰小,引弧效果好。 相似文献
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应用晶体管脉冲技术和可控硅电路改制普通的ZXG1-300硅整流焊机成为带尖峰低频脉冲钨极氩弧焊机,对其性能原理进行了分析,采用吸收电容解决了高频引弧器对单结晶体管触发器的电磁干扰,并使用了简单有效的网路电压波动补偿线路。 相似文献
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采用UC3842设计了电流控制型脉宽调制开关式高频振荡引孤器,并对其工作原理进行了分析.试验表明该开关式高频振荡引弧器控制系统具有频响快、输出高频高压稳定的特点,是一种性能较好的开关式高频振荡引弧器. 相似文献
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在脉冲CO2焊设备采用恒流控制电流波形时,其外特性也就变为恒流特性,这样就需要在恒流闭环控制CO2焊脉冲电流波形的基础上采用相应措施,来保证CO2焊电源具有足够的电弧电压自动调节性能.从电弧能量控制的角度,研究了通过控制CO2焊燃弧过程峰值电流时间的途径来闭环自动调节脉冲CO2焊电弧电压的斜特性式控制方法;提出了以脉冲式CO2焊逆变电源外特性斜率为判据的控制算法,使脉冲CO2焊电源输出外特性斜率可调.结果表明,斜特性脉冲CO2焊电源能在焊接过程中自适应调节电弧电压,并可通过改变电源外特性斜率来定量调节电源对弧长的自动调节强度. 相似文献
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Arc stability in AC/DC pulsed MIG welding is mostly determined by the performance of the arc length control system. This system detects the arc voltage as arc length information for feedback purposes and varies the output of the welding power source so that the arc voltage is equal to the voltage set point. For example, at a high arc length, the arc voltage increases. The pulse frequency is reduced in response, the wire melting rate is reduced and the arc length is returned to normal. 相似文献
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《Science & Technology of Welding & Joining》2013,18(4):369-373
AbstractThe present paper experimentally investigates and analyses in detail the electrical characteristics of the arc for the hybrid pulsed micro-tungsten inert gas process. In particular, an average voltage–current (V–I) graph plotting approach is proposed to describe the dynamic characteristics of the hybrid arcs using the filtered voltage and current of the arc. It is shown that the average voltage and electrical resistance of the heavily hybrid pulsating (HHP) arc are lower than those of the slightly hybrid pulsating (SHP) arc, particularly during the background current stage. Furthermore, the analyses reveal that the average V–I characteristic graph for the arc forms a hysteresis loop, primarily because of the thermal inertia of the arc, during a pulse period. This closed loop is larger for the SHP arc than for the HHP arc, and shrinks longitudinally with increasing frequency and width of the current pulse. These results thus demonstrate that the HHP arc has a greater thermal inertia, particularly at higher current and pulse frequency. Experimental results show also that the mean voltage of the arc and the features of the hysteresis loop vary markedly with weld penetration in addition to pulsating frequency and pattern, and thus suggest the possibility of monitoring the hybrid pulsed weld penetration via arc sensing. 相似文献
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Abstract Arc stability in AC/DC pulsed MIG welding is mostly determined by the performance of the arc length control system. This system detects the arc voltage as arc length information for feedback purposes and varies the output of the welding power source so that the arc voltage is equal to the voltage set point. For example, at a high arc length, the arc voltage increases. The pulse frequency is reduced in response, the wire melting rate is reduced and the arc length is returned to normal. 相似文献
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本文介绍了超小型场效应管式中频脉冲弧焊逆变器的特点及工作原理,对主电路安全工作与干扰问题进行了分析。本电源对50kHz高频逆变器脉冲进行50~500Hz的中频调制,具有良好的引弧性能及工艺适应性。 相似文献