Series Load Resonant Soft-Switched PWM and PDM High Frequency Inverter using Auxiliary Active Edge-Resonant Snubber

In this paper, a novel type of auxiliary active snubbing circuit assisted edge-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 mode 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 PWM series load resonant high frequency inverter evaluated. The practical effectiveness and operating performance of pulse width modulation high frequency inverter are discussion on the basis of simulation and experimental results as compared with the conventional soft-switching high frequency inverter.