摘要
本文就分析恒流模拟型晶体管弧焊电源效率问题着手,提出了开发开关型晶体管弧焊电源的必要性与合理性。并对其主电路工作过程进行了数学求解,得出了调节灵敏度与占空比的函数关系式。文章对大功率晶体管的选择与保护问题从理论上进行了详细的剖析,尤其对采取串接均流电阻以防止二次电压击穿提出了新见解。文章最后给出了研制的120A开关型晶体管弧焊电源的技术数据和进行不锈钢薄板环对接的TIG焊工艺试验结果。
Starting from analysing the efficiency of constant current analogue-type transistor arc welding power source,the authors found that it is necessary and rational to develop a switch-type transistor arc welding power source. After mathematical analysis of the work process of main circuit, the function relationship of the regulation sensitivity to the ratio of pulse width was abtained. In this paper, the problems of choosing and protecting large power transistors have been analyzed theoretically in detail. Especially, a new idea of originality was put forward by using series resistance in emitter to avoid secondary voltage breakdown. The paper also provides the technical data of the 120A switch-type arc welding power source and the experimental results of welding a circular butt joint of stainless steel thin-wall shell with TIG.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1989年第4期235-244,共10页
Transactions of The China Welding Institution
