Abstract
It is well known that it is important to keep flashing continuous just before upsetting for high quality of weld joints in flash welding.
To achieve continuous flashing, mechanical control has been applied.
As mechanical flashing control has a limit of response for more precise control, an application of power electronics especially PWM inverter is discussed for flash welding.
Since no study has been reported regarding flashing phenomena using square wave alternating current as well as application of PWM inverter for flashing phenomena control, flashing phenomena in square wave alternating current by use of PWM inverter power supply are discussed for flashing control in this paper.
It is concluded that PWM inverter is suitable to control flashing phenomena such as number of flashing pulses or degree of heating.
