Abstract
It is well known that it is important to keep flashing continuous just before upsetting for high quality of weld joint 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.
Flashing phenomena supplied with square wave AC voltage source are discussed, and based on the results, flashing phenomena control strategy is proposed by use of PWM inverter power supply, in this paper.
The results are summarized as follows;1 PWM inverter enables to control flashing phenomena in half a cycle.
2 PWM inverter control for continuous flashing and resistance heating with a few flashing are proposed.
3 PWM inverter control for flash process in flash welding is proposed.
