새로운 유도가열 조리용 PWM 고주파 인버터의 개발

Development of an New Induction Heating Cooker PWM High Frequency Inverter

This research presented the new induction heating cooker PWM high frequency inverter solving the problem of induction heating cooker PWM high frequency inverter circuit which is using widely in the practical application of an induction heating apparatus, the soft switching operation and power control are impossible when the lowest power supply in the active auxiliary resonant snubber with for induction heating cooker PWM high frequency inverter. The inverter circuit which is attempted by on-off operation of a switch has the reduction effect of the power loss due to a soft switching and a high frequency switching. And it confirmed that the power regulation is possible continuously from 0.25[kW] until 2.84[kW] in the case the duty rate(D) changes from 0.08 to 0.3 under zero-current switching operating by a dissymmetry pulse width modulating control and the power conversion efficiency comes true the efficiency of 95[%]. Due to the result above, the active auxiliary resonant snubber with for induction heating PWM high frequency inverter will be effective as sources of an induction heating apparatus.