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1. (WO2018176301) TRANSFORMER AND POWER ADAPTER

Pub. No.:    WO/2018/176301    International Application No.:    PCT/CN2017/078715
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 31 01:59:59 CEST 2017
IPC: H01F 27/38
H01F 27/36
H02M 1/44
Applicants: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO., LTD
深圳创维数字技术有限公司
Inventors: LV, Zhitao
吕志涛
ZHOU, Feng
周峰
Title: TRANSFORMER AND POWER ADAPTER
Abstract:
A transformer (100) and a power adapter are provided. The transformer comprises: a frame (N0), a primary coil (N1) reverse-wound on the frame, an auxiliary coil (N2), a shielding coil (N4), and a secondary coil (N3) forward-wound on the frame. The primary coil is configured to receive a voltage signal output by a power supply, and provide, according to the voltage signal, an input voltage signal to the secondary coil. The secondary coil is connected to a load, and is configured to output, according to the input voltage signal, a powering voltage to power the load. The auxiliary coil and the primary coil are disposed according to dotted ends, and are configured to transform, according to the turn ratio of the transformer, the powering voltage into an auxiliary voltage signal. The shielding coil is grounded, is used as a shielding layer of the transformer, and is configured to adjust the parasitic capacitance of the transformer and suppress electromagnetic interference (EMI).