新型逆变式高压脉冲引弧器的研制

针对微机控制的钨极脉冲氩弧焊在引弧时控制系统容易受到干扰的问题,研制了一种新型高压脉冲引弧装置。在主电路拓扑结构上采用特殊的输出变压器构成逆变升压电路,在控制电路上实现了单脉冲引弧,改变了传统的高压脉冲中叠加高频成分的设计,这样既保证了可靠引弧,又减少了对微机控制系统的干扰,使引弧装置的体积和成本大大降低。在50 m加长电缆的工作条件下,引弧距离可达10~12 mm,同时也能实现微机控制系统的可靠工作。

Study on the new inverter-type high-voltage pulse arc ignition device

For pulsed TIG power source controlled by microcomputer,the electromagnetic disturbance occurred frequently during arc ignition.In order to suppress the disturbance,a new high-voltage pulse arc ignition device is discussed in this paper.By using a special output transformer,a new inverter topology is designed;thus the lower cost and smaller volume are realized.Under the working condition of 50 m cable,are ignition distance can reach 10 to 12 mm and the microcomputer control system works reliably.