基于电阻焊机恒流控制的研究  

Study on constant current of resistance spot welding

作　　者：张小平[1] 

机构地区：[1]攀枝花学院电气信息工程学院,四川攀枝花617000

出　　处：《电焊机》2010年第9期51-53,共3页Electric Welding Machine

摘　　要：针对焊接系统有些焊接工艺要求负载电流恒定的特性,分析了一种基于恒流控制的全数字控制方法,其实现方法是对焊接工件的负载电流通过电流传感器采样,然后通过DSP来闭环运算控制SCR导通角的大小,从而改变负载电压的输出去控制焊接电流。该数字控制主要针对电网电压的波动以及负载特性的变化时,通过改变输出电压来确保负载电流的恒定。理论分析和实验结果表明,该方法能有效的控制焊接电流恒定,达到满意的效果。For welding system some welding to load current constant characteristics,this analysis is based on a constant flow of control of the full digital control method to the implementation approach is to solder the load current is an electric current pass through and through the sensor sampling DSP to shut the control of leading the operation of SCR to change the size of the voltage and output to control the welding.The current control mainly for electrosurgical generator fluctuations and the nature of change,by changing output voltage to ensure.

关 键 词：恒流控制 双向晶闸管 电阻点焊 DSP 

分 类 号：TG409[金属学及工艺—焊接]