公开(公告)号：US20230132923A1

公开(公告)日：2023-05-04

申请号：US17597187

申请日：2020-11-24

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE

Inventor： Jung Un PARK ,  Ja-Chun KOO ,  Sang-Kyoo HAN ,  Ji Hun BAE ,  Nayoung LEE ,  Jae Dong CHOI

IPC: H02M3/158 ,  H02M1/08 ,  H02J7/00 ,  H03K17/687 ,  H03K17/06

Abstract: According to the present invention, an output inductor, rather than being composed of a separate inductor element, is magnetically coupled to a third inductor and a fourth inductor constituting a second transformer. Thus, compared to the case in which the output inductor is composed of the separate inductor element independently of the third inductor and the fourth inductor, the cost as well as the volume of the DC-DC conversion device can be reduced.

公开(公告)号：US20190363632A1

公开(公告)日：2019-11-28

申请号：US16420556

申请日：2019-05-23

Applicant: KOREA AEROSPACE RESEARCH INSTITUTE ,  KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Na Young LEE ,  Jae Dong CHOI ,  Sang Kyoo HAN ,  Ju Young LEE

IPC: H02M3/335 ,  H02M1/14

Abstract: A flyback converter is provided, which includes a transformer comprising a primary winding and a secondary winding, the transformer for transforming a power inputted from an input power supply and outputting the transformed power, a switching part having one end connected to the primary winding and the other end connected to the input power supply, and an auxiliary circuit including an auxiliary capacitor, and an auxiliary winding coupled to the primary winding. In addition, a clamping diode and a two-series connected switch structure is utilized for the switch stage to relieve the voltage stress of the switch. Accordingly, it is possible to reduce the voltage stress of the switch and also reduce the ripple of the input current which are the causes of EMI.