The resonant soft switching inverter arc welding power source uses LCL type structure in the main circuit, and selects phase shifting pulse wide modulation technique in the control system.
研制的谐振式软开关弧焊逆变电源，主电路采用新型LCL结构，控制系统选用恒频移相调脉宽控制方案。
2
The switchingcircuit is offen used in the pulse digital system. As the switchingcircuit is acted on by capacitive load, the working speed of the switching circuit is limited.
开关电路是脉冲数字系统中常用电路之一，由于负载电容的影响，限制了该电路的工作速度。
3
Receiving the third signal and based on a reference voltage, the switchingcircuit controls the pulse wave width of the switching signal so as to adjust output current of the power converter.