Title:
DC/DC CONVERTER AND COMMUNICATION POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2022/048287
Kind Code:
A1
Abstract:
Disclosed are a DC/DC converter and a communication power supply. The converter comprises a primary winding, a secondary winding, a resonant inductor, a resonant capacitor, and a noise suppression network; the primary winding and the secondary winding form a transformer; the noise suppression network is connected between a primary quiet point and a secondary quiet point; the primary quiet point is a DC stable potential point at the input end of the DC/DC converter, and the secondary quiet point is a DC stable potential point at the output end of the DC/DC converter; a first parasitic capacitance of a first end of the primary winding with respect to the secondary quiet point is equal to a second parasitic capacitance of a second end of the primary winding with respect to the secondary quiet point; the noise suppression network generates a suppression current, having the direction thereof opposite to the direction of a total noise current generated by the resonant inductor and the resonant capacitor and used for suppressing the total noise current, and the voltage of the noise suppression network changes as the load magnitude changes. Therefore, common mode noise suppression in a full load range is achieved, and common mode noise caused between the primary winding and the secondary winding is effectively reduced.
Inventors:
YE QIONG (CN)
CHENG JIEBIN (CN)
WANG QINGHAI (CN)
GUO FULONG (CN)
CHENG JIEBIN (CN)
WANG QINGHAI (CN)
GUO FULONG (CN)
Application Number:
PCT/CN2021/103422
Publication Date:
March 10, 2022
Filing Date:
June 30, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M3/28; H02M1/12; H02M1/32; H02M3/335
Foreign References:
| CN112234824A | 2021-01-15 | |||
| CN109643956A | 2019-04-16 | |||
| CN103190063A | 2013-07-03 | |||
| CN110289752A | 2019-09-27 | |||
| JP2001352755A | 2001-12-21 | |||
| CN202010930447A | 2020-09-07 |
Other References:
See also references of EP 4080751A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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