soft arc

A new FB-ZVZCS-PWM soft-switching inverter arc welding power supply was introduced, which adopted the auxiliary transformer and limited bipolar control mode. The principles of realizing zero voltage switching ( ZVS) for leading leg by capacitor and ZCS for lagging leg by auxiliary transformer were explained.

文中介绍了采用原边辅助变压器、有限双极性控制的新型FB-ZVZCS-PWM软开关弧焊逆变电源实现超前臂零电压开关和滞后臂零电流开关的工作原理。

The roller differential heat treatment ( DHT) by soft arc, fan shaped arc curtain like, thermal source in which formed by the interact process between arc electric field and alternating magnetic field was introduced.

采用电弧与交变磁场交互作用后形成的柔性电弧（扇状弧幕）加热轧辊表面，实现了轧辊差温热处理。

The decreasing time of free-wheeling current is relative to duty cycle in the exiting FB-ZVZCS-PWM soft-switching inverter arc welding power supply with the block capacitor, and it is hard to achieve zero current switching ( ZCS) for lagging leg with low duty cycle.

现有FB-ZVZCS-PWM软开关弧焊逆变电源采用阻断电容衰减原边环流电流所需的时间与占空比有关，占空比很小（电源输出电压很低）时滞后臂难以实现零电流开关。

Design and parameters election for soft-switch arc welding power source(ⅰ)

软开关弧焊电源的设计及参数选择（I）

Development of Soft-Switch APFC Equipment for Arc Welding Converter

逆变式弧焊电源软开关APFC装置的研制