Title:
PLANAR TRANSFORMER, POWER SOURCE CONVERSION CIRCUIT AND ADAPTER
Document Type and Number:
WIPO Patent Application WO/2023/098280
Kind Code:
A1
Abstract:
A planar transformer, a power source conversion circuit and an adapter. The planar transformer comprises N transformer sub-structures, wherein each transformer sub-structure comprises a first magnetic core, a second magnetic core and a PCB winding board; the PCB winding board comprises a first composite winding layer and a second composite winding layer; the first composite winding layer comprises first winding sub-layers and second winding sub-layers; a second winding sub-layer is arranged between every two adjacent first winding sub-layers; the second composite winding layer comprises two third winding sub-layers and one fourth winding sub-layer; the fourth winding sub-layer is arranged between the two adjacent third winding sub-layers; the number of turns of each first winding sub-layer is the same as the number of turns of each third winding sub-layer; and the number of turns of each second winding sub-layer is the same as the number of turns of the fourth winding sub-layer, and the winding direction of the second winding sub-layer is opposite to that of the fourth winding sub-layer. By means of the planar transformer provided in the present application, a primary winding and a secondary winding in the planar transformer are designed in a symmetrical cancellation manner, such that a better common-mode noise suppression effect can be achieved with a small size.
More Like This:
Inventors:
FANG LEAN (CN)
LI JIA (CN)
CAO YUE (CN)
CHEN WENJIE (CN)
ZHANG XIJUN (CN)
LI CHUANGPENG (CN)
LI JIA (CN)
CAO YUE (CN)
CHEN WENJIE (CN)
ZHANG XIJUN (CN)
LI CHUANGPENG (CN)
Application Number:
PCT/CN2022/123887
Publication Date:
June 08, 2023
Filing Date:
October 08, 2022
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01F27/30; H01F17/00; H01F27/28; H02J7/04
Foreign References:
| CN114373613A | 2022-04-19 | |||
| CN207068607U | 2018-03-02 | |||
| TWI747508B | 2021-11-21 | |||
| US20060152326A1 | 2006-07-13 |
Other References:
LONG XIAO, WU LIANG, LI XIN, ZHAO JUN, CHEN GUOZHU: "Optimal Design of Planar Magnetic Integrated Matrix Transformer for High Frequency LLC Converter", TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, vol. 35, no. 4, 25 February 2020 (2020-02-25), pages 758 - 766, XP093068676, ISSN: 1000-6753, DOI: 10.19595/j.cnki.1000-6753.tces.181943
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
Download PDF: