A Multiple Voltage and Current High-Frequency Pulse Generation Converter for the Resistance Welding Applications

In this paper, we propose a novel bipolar voltage and current pulse generation converter (BVCP-GC) for the resistance welding applications by combining a phase-shifted full-bridge converter and a new multi-function pulse generator. The proposed BVCP-GCT consists of a phase shifted full bridge (PSFB) converter as the first stage and the proposed multi-functional pulse generator as the second stage, which can generate unipolar and bipolar voltage pulses as well as unipolar and bipolar current pulses. The detailed operation principles and key characteristics of the proposed converter are also given. Finally, a reduced experimental prototype was developed. Experimental results verify that the proposed converter can generate positive-voltage pulses, negative-voltage pulses, bipolar-voltage pulses, and bipolar-current pulses.