...熔系统自动控制 关键词]软熔系统；软熔点；大功率晶闸管功率单元；有功电压闭环控制 [gap=974]Key words：soft melting system；soft melting point；high power thyristor unit；active voltage close loop control ..
Practiceprovesthatsoftmeltingsystem is runningstably, functionis reliable, controlaccuracy is high, meetstheneedofproductionprocess and improvesyieldandquality of tinningstrip.