Active Inductor Snubber Assisted Zero Voltage Soft Switching PWM High-Frequency Resonant Inverter for Induction Heated Roller Drive

摘要

This paper presents a novel version of an active voltage clamped ZVS-PWM high frequency inverter using IGBT_s for electromagnetic induction eddy current based rolling drum heating in new generation copy and printing machines in consumer business use. The operating principle of this inverter circuit and unique features are described herein. Its constant frequency duty cycle (asymmetrical PWM) controlled voltage source quasi-resonant soft switching high frequency inverter employing IGBT_s is proposed, which is capable of achieving stable and efficient zero voltage soft switching commutation over a widely specified power regulation range from full power to low power. The operating performances in a steady state of this inverter is discussed and evaluated on basis of simulation and experimental results as an induction heated roller in new generation copy machine.