公开(公告)号：US20220238268A1

公开(公告)日：2022-07-28

申请号：US17721034

申请日：2022-04-14

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Ning WANG ,  Jiebin CHENG ,  Wei TAN

IPC: H01F27/24 ,  H01F27/28

Abstract: This application provides a planar transformer and an active circuit, and may be applied to a telecommunications device and a communications power supply in fields such as a 5G mobile communications technology and cloud computing. The planar transformer includes a winding structure and a magnetic core structure. The winding structure includes a primary-side winding and a secondary-side winding. The magnetic core structure includes a first magnet part, a second magnet part, and a plurality of magnetic cylinders. The plurality of magnetic cylinders are located between the first magnet part and the second magnet part. The primary-side winding is wound around M magnetic cylinders in the plurality of magnetic cylinders, wherein M is a positive integer equal to or greater than three (3). A cross-sectional area of at least one of the M magnetic cylinders is different from a cross-sectional area of another magnetic cylinder.