公开(公告)号：US10476398B1

公开(公告)日：2019-11-12

申请号：US15968644

申请日：2018-05-01

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Minsung Kim ,  Sooa Kim ,  Bumyun Kim

IPC: H02M3/335 ,  H02M7/219 ,  H02M7/48 ,  H02M1/00 ,  H02J3/38

Abstract: The present invention relates to a technique for expanding an input voltage range of a power conversion circuit for photovoltaic power generation, and improving the efficiency of the power conversion circuit.The power conversion circuit for photovoltaic power generation with high efficiency over a wide input voltage range may include: a full-bridge converter unit including a full-bridge converter constituted by first to fourth switches, and configured to operate in a resonant boost mode or phase-shift full-bridge series-resonant converter mode, and convert an input DC voltage into a DC voltage having a level equal to or lower than the input DC voltage; an active voltage-doubler rectifier circuit including a half-bridge converter constituted by fifth and sixth switches, a resonance inductor and a resonance capacitor, and configured to boost an input voltage to a target-level DC voltage, and output the DC voltage to a load; and a transformer configured to connect the full-bridge converter and the active voltage-doubler rectifier to each other in their insulation.