Induction Heated Load Resonant Tank High Frequency Inverter with Asymmetrical Auxiliary Active Edge-Resonant Soft-Switching Scheme

  • Saha Bishwajit (Division of Electrical & Electronic Engineering, Electric Energy Saving Research Center, Kyungnam University) ;
  • Fathy Khairy (Division of Electrical & Electronic Engineering, Electric Energy Saving Research Center, Kyungnam University) ;
  • Kwon Soon-Kurl (Division of Electrical & Electronic Engineering, Electric Energy Saving Research Center, Kyungnam University) ;
  • Lee Hyun-Woo (Division of Electrical & Electronic Engineering, Electric Energy Saving Research Center, Kyungnam University) ;
  • Nakaoka Mutsuo (Division of Electrical & Electronic Engineering, Electric Energy Saving Research Center, Kyungnam University)
  • Published : 2006.06.01

Abstract

In this paper, a novel type of auxiliary active snubbing circuit assisted quasi-resonant soft-switching pulse width modulation inverter is proposed for consumer induction heating equipments. The operation principle of this high frequency inverter is described using switching modes and equivalent circuits. This newly developed series resonant high frequency inverter can regulate its high frequency output AC power under a principle of constant frequency active edge resonant soft-switching commutation by asymmetrical PWM control system. The high frequency power regulation and actual power conversion efficiency characteristics of consumer induction heating (IH) products using the proposed soft-switching pulse width modulation (PWM) series load resonant high frequency inverter evaluated. The practical effectiveness and operating performance of high frequency inverter are discussion on the basis of simulation and experimental results as compared with the conventional soft-switching high frequency inverter.