公开(公告)号：US20220158553A1

公开(公告)日：2022-05-19

申请号：US17665590

申请日：2022-02-07

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Tadashi SADOHARA ,  Masakazu MIYAMOTO

IPC: H02M3/156 ,  H02M1/08 ,  H02M3/07

Abstract: The DC-DC converter may be configured to perform DC-DC power conversion between a primary side and a secondary side. The DC-DC converter may include: a reactor; a switching element configured to switch between an on period for accumulating a first energy in the reactor from the primary side and an off period for releasing the first energy from the reactor to the secondary side, causing a switch voltage acting on the switching element to rise during the off period; a first capacitor; and a second capacitor. The second capacitor may be configured to: accumulate a charge provided from the primary side during the off period; and transfer the charge to the first capacitor during the on period. The first capacitor may be configured to suppress, using the charge transferred from the second capacitor, the rise of the switch voltage after the switching element is switched back to the off period.