친환경 자동차, 대용량 조명장치 등에 적용이 가능한 전력변환장치(다상 교호 강압 컨버터)의 특성에 대한 연구

A step-down non-isolated Buck converter is acommon and basic topology in the field. Weanalyzed the Characteristic of Multiphase InterleavedBuck Converter in DCM(Discontinuous CurrentMode) and CCM(Continuous Current Mode) for lawripple and high efficiency1). Multiphase buckconverter has more advantages than other topology.
Input current of converter is divided into eachconverters because of the structure. it has featuresof decreasing input current ripple and increasingefficiency of converter. So we can reduce the sizeof Capacitor and Inductor2). It means that the sizeof system is also reduced3). The Time ReverseRecovery loss of diode was also affected4)5), theTRR loss was confirmed to be negligible in the120kHz 8 Phase case despite the CCM situation. Inthis study, the effects of the loss factors wereanalyzed on the efficiency of the multiphaseinterleaving buck converter in DCM and CCM, andit would be helpful to design a more efficientconverter by effectively controlling the factors ofeach loss. At least, we tested the performance ofthe analyzed system with PSpice.