Application of digital driving circuit in arc welding power source based on HCPL-316J

The digitalization of arc welding power source mainly depends on the digitalization of arc welding inverter,so that main circuit and controlling system can give full play to advantages.Digital switching control makes main circuit digital and DSP and/or MCU makes controlling system,digital.So IGBT driving circuit,as a tie of main circuit and controlling system,should also be got digitalized.Thus,a digital driving circuit based on optocoupler device HCPL-316 J is provided.Some testing experiments were done.After driving testing,the driving circuit certificates that driving waveforms satisfy the requirements of arc welding power source and the driving circuit is reasonably and simply designed.And the driving circuit has high controlling precision and reliability.No-load-voltage testing and welding external characteristic testing prove that the driving circuit can be applied in arc welding power source.