US 12,316,222 B2
DC-DC conversion device having coupling inductor
Jung Un Park, Daejeon (KR); Ja-Chun Koo, Daejeon (KR); Sang-Kyoo Han, Daejeon (KR); Ji Hun Bae, Seoul (KR); Nayoung Lee, Daejeon (KR); and Jae Dong Choi, Sejong-si (KR)
Assigned to KOREAN AEROSPACE RESEARCH INSTITUTE, Daejeon (KR)
Appl. No. 17/597,187
Filed by KOREA AEROSPACE RESEARCH INSTITUTE, Daejeon (KR)
PCT Filed Nov. 24, 2020, PCT No. PCT/KR2020/016634
§ 371(c)(1), (2) Date Dec. 28, 2021,
PCT Pub. No. WO2021/132901, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 10-2019-0176348 (KR), filed on Dec. 27, 2019.
Prior Publication US 2023/0132923 A1, May 4, 2023
Int. Cl. H02M 3/158 (2006.01); H02J 7/00 (2006.01); H02M 1/00 (2007.01); H02M 1/15 (2006.01)
CPC H02M 3/158 (2013.01) [H02J 7/007 (2013.01); H02M 1/0064 (2021.05); H02M 1/15 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A DC-DC conversion device comprising:
a first transformer connected between a ground and a first node between an input terminal to which an input voltage is applied and an output terminal to which an output voltage is applied, and including a first inductor and a second inductor that are magnetically coupled to each other;
a first switch connected in series with the first inductor between the first node and the ground;
a second switch connected in series with the second inductor between the first node and the ground;
a first reverse current preventing element connected to a second node between the first inductor and the first switch and a fourth node between the input terminal and the output terminal;
a second reverse current preventing element connected to a third node between the second inductor and the second switch, and the fourth node;
a second transformer positioned between the input terminal and the output terminal and including a third inductor and a fourth inductor that are magnetically coupled to each other;
a third reverse current preventing element connected to the fourth inductor and the fourth node;
a link capacitor connected to the fourth node, and the first switch and the second switch; and
an output inductor connected to the fourth node and the output terminal,
wherein the output inductor is magnetically coupled to the third inductor and the fourth inductor,
wherein one terminal of the third inductor is connected to each of the first switch, the second switch, and the link capacitor, and the other terminal of the third inductor is connected to the ground such that the third inductor is positioned between the ground and each of the first switch, the second switch, and the link capacitor, and
wherein one terminal of the fourth inductor is connected to the first node, and the other terminal of the fourth inductor is connected to an anode of the third reverse current preventing element.