交错分时控制弧焊高频逆变电路的研究

Time-sharing Control for the High-frequency Welding Inverter Power Supply

针对目前焊接逆变电源的高频化要求,研究了一种采用多桥并联、交错分时工作实现高频的电压型逆变电路。该电路采用N个桥路并联工作,通过输出变压器的组合控制,使输出电路频率达到N倍频。同时,该电路不受开关管死区时间的制约,实现多倍频的电路工作频率,且控制方便、实现简单,具有很好的应用前景。在分析电路工作过程的基础上,对变压器漏感对能量传递及工作性能的影响进行了仿真分析,实验验证了电路的正确性。对电路具体实现具有重要的指导意义。

For improving the frequency of welding power,a time-sharing control for multi-bridge parallel voltage source inverter power supply is studied.Through the combination of the output transformer, the N bridges paralleled in this inverter circuit,can improve the output to N times circuit working frequency.Meanwhile,the circuit topology is not subject to the constraint of the inverter switch dead time,simple and easy to control.It has a good prospect of application.Based on the analysis of the circuit working process, this paper focus on the effect of the transformer leak- age inductance on energy transfer and working performance.The simulation analysis on the circuit and the experimen- tal results verify the correctness of the circuit.It has a significance guiding to achieve the circuit.