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김칠용(C. Y. Kim),문상필(S. P. Mun),김영문(M. Y. Kim),김해재(H. J. Kim),류재엽(J. Y. Lyu),김수욱(S. W. Kim) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
This research presented the new zero-current switching pulse width modulation SEPP(Single Ended Push-Pull)high frequency inverter for solving the problem of the zero-current SEPP 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 zero-current switching pulse width modulation SEPP 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 025[㎾] until 2.84[㎾] 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[%]. Doe to the result above, the ZCS PWM SEPP high frequency inverter will be effective as sources of an induction heating apparatus.
전도손실 저감 및 효율 상승을 위한 PWM DC-DC 컨버터의 특성
김영문(M. Y. Kim),김해재(H. J. Kim),김칠용(C. Y. Kim),류재엽(J. Y. Lyu),김수욱(S. W. Kim) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.11
Presented increase and so on of switch stress and switching dissipation and EMI that is happened in general PWM converter and in this study to solve problem the resonance energy return to life rate and new active snubber PWM converter because do maximization. Active snubber PWM converter that try adds auxiliary switch and resonance capacitor, diode to existing converter under all switching conditions turn on/off Minimised switching dissipation that occur. Reduced harmonic components absorbing station recovery electric current that happen to snubber diode inserting diode and resistance. And decreased peak current that is happened in auxiliary switch arranging resonance capacitor and inductor properly. Certified effect that efficiency rises about 2.5 [%] more than existent PWM converter in rated load through an experiment.