Effects of electrode and phase configurations on arc behavior and temperature distribution in a multiphase AC arc were successfully clarified. A high-speed video camera with band-pass filters were addressed to measure the arc. A multiphase AC arc is promising material processing technology owing to the characteristics of large high-temperature volume and high energy efficiency. The arc behavior was observed by imaging arc discharge with a high-speed camera in millisecond time scale. The temperature was conducted by Boltzmann plot method using two types of argon line emissions filtered by the band-pass filters. The obtained excitation temperature is high with a range of 7.0×103 to 1.3×104 K. The arc swing in front of electrode becomes wider and the temperature uniformity improves as the number of electrodes and phases increase. The characteristic time due to fluctuation of 12-phase AC arc was 1.4 ms, which was sufficiently shorter than the residence time of raw material in the arc. The 12-phase AC arc is useful for material processing in terms of temperature uniformity and fluctuation time.
!!!All Science Journal Classification (ASJC) codes
- 化学 (全般)