Title:
PLANAR TRANSFORMER AND ACTIVE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/073121
Kind Code:
A1
Abstract:
Provided in the present application are a planar transformer and an active circuit, which may be applied to telecommunication devices and communication power sources in fields such as 5G mobile communication technology and cloud computing. The planar transformer comprises a winding structure and a magnetic core structure. The winding structure comprises a primary-side winding and a secondary-side winding, and the magnetic core structure comprises a first magnet part, a second magnet part and a plurality of magnetic posts. The plurality of magnetic posts are located between the first magnet part and the second magnet part, the primary-side winding winds around M magnetic posts among the plurality of magnetic posts, where M is a positive integer, and M≥3. There is at least one magnetic post among the M magnetic posts that has a cross-sectional area that is different from the cross-sectional areas of the other magnetic posts. The planar transformer can achieve a fractional transformation ratio using a relatively small number of windings, and effectively reduces the loss of the transformer by means of reducing the number of windings of the transformer.
Inventors:
WANG NING (CN)
CHENG JIEBIN (CN)
TAN WEI (CN)
CHENG JIEBIN (CN)
TAN WEI (CN)
Application Number:
PCT/CN2020/093655
Publication Date:
April 22, 2021
Filing Date:
June 01, 2020
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01F27/24; H01F27/28; H01F27/30
Domestic Patent References:
| WO2018160962A1 | 2018-09-07 |
Foreign References:
| CN110828126A | 2020-02-21 | |||
| CN107946045A | 2018-04-20 | |||
| CN1409333A | 2003-04-09 | |||
| JP2010278387A | 2010-12-09 | |||
| CN201910974525A | 2019-10-14 | |||
| CN1257518C | 2006-05-24 |
Other References:
See also references of EP 4036941A4
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