公开(公告)号：US20250087410A1

公开(公告)日：2025-03-13

申请号：US18462723

申请日：2023-09-07

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Feng Jin ,  Ahmed Nabih ,  Qiang Li

IPC: H01F27/30 ,  H01F27/24 ,  H02M3/335

Abstract: Power converters with integrated transformers and resonant inductors are described. An example integrated transformer can be electrically coupled between a primary-side converter stage and a secondary-side converter stage in a power converter. The integrated transformer can include a magnetic core with plurality of core legs, a primary winding extending around each of the plurality of core legs, and a secondary winding extending around each of the plurality of core legs. A winding direction of the primary winding is alternated between adjacent core legs among the plurality of core legs, and a winding direction of the secondary winding is alternated between adjacent core legs among the plurality of core legs. Additionally, a number of winding turns of the primary winding and a number of winding turns of the secondary winding on a first core leg is different than on a second core leg among the plurality of core legs.

公开(公告)号：US20250046512A1

公开(公告)日：2025-02-06

申请号：US18362222

申请日：2023-07-31

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Ahmed Nabih ,  Feng Jin ,  Qiang Li

IPC: H01F27/28 ,  H01F27/26 ,  H02M1/00 ,  H02M3/335

Abstract: Power converters with integrated transformers and resonant inductors are described. An example power converter includes a primary-side converter stage, a number of secondary-side converter stages, and an integrated transformer and resonant inductor coupled between the primary-side and secondary-side converter stages. The integrated transformer includes a magnetic core having a first leg, an auxiliary leg, and a second leg. The integrated transformer also includes a first transformer having a first primary winding, a first secondary winding, and a first shield winding on the first leg, and a second transformer having a second primary winding, a second secondary winding, and a second shield winding on the second leg. The first shield winding is electrically coupled to provide an extension of the first primary winding for the first transformer, and an end of the first shield winding or the second shield winding is electrically coupled to a primary-side ground of the power converter.