Series Load Resonant Soft-Switching PWM High Frequency Inverter with Auxiliary Active Edge-Resonant Snubber

In this paper, a novel type of auxiliary active snubbing circuit assisted edge-resonant softswitching pulse width modulation (PWM) inverter is proposed for consumer induction heating equipments. The operating 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 softswitching 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 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.