关键词: 逆变电源, 电阻点焊, 焊接电流, 焊接电压

Abstract:

The accurate measurement of welding current and voltage is very important to the exact control of resistance spot welding inverter and welding quality.In this paper.the typical measuring methods for large currents are introduced,and the Rogoswki outer-integral measurement is adopted to obtain the large welding current of resistan ce spot welding in-verter.This method is proved feasible by the an alysis of experime ntal results and the model simulation via Matlab.More-over.the welding current and voltage waveforms under diferent current setting an d diferent welding load conditions are analyzed.with the results showing that the welding current is a kind of direct current with slight pulses,while the weld-ing voltage is evidently pulsed.Thus,the dynamic information of the welding current an d voltage is obtained .

Key words: inverter, resistance spo t welding, welding current, welding voltage