论文部分内容阅读
本文阐述了可控硅逆变式电源的组成及工作原理,这种电源是由一般的直流焊接电源和一个可控硅逆变器组成的。分析了线路的工作原理及一些工艺参数对设备正常运行的影响。这种电源的交流电流频率和正负半波电流比值均可以分别调节,电源的主要技术参数是: 输入电压 380伏交流电流频率 2～100HZ 输出电流 20～300A 正负半波电流比例 0.3～0.7 空载电压 70伏负载持续率 80％这种电源可以不用采取任何外加稳弧措施,进行铝合金交流TlG焊,焊接高强度铝合金接头强度可以比一般电源焊接的提高10％左右。改变输出端的接线,这种电源也可以做为直流断续器使用,满足直流TlG脉冲焊的要求。
This article describes the SCR inverter power supply composition and working principle, this power supply is a general DC welding power supply and a SCR inverter composition. The working principle of the circuit and the influence of some process parameters on the normal operation of the equipment are analyzed. The AC power frequency and the positive and negative half-wave current ratio can be adjusted separately. The main technical parameters of the power supply are as follows: Input voltage 380 VAC Current frequency 2 ~ 100HZ Output current 20 ~ 300A Positive and negative half-wave Current ratio 0.3 ~ 0.7 No-load voltage 70 V Load sustained rate 80% This power supply can not take any additional stability measures arc aluminum TlG AC welding, welding strength aluminum alloy joints can be increased than the general power welding about 10%. Change the output wiring, this power can also be used as a DC interrupter to meet the DC TlG pulse welding requirements.