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Title:
POWER SUPPLIES HAVING FEEDFORWARD CONTROL USING PULSE MODULATION AND DEMODULATION
Document Type and Number:
WIPO Patent Application WO/2018/040013
Kind Code:
A1
Abstract:
Example isolated AC-DC power supplies include a PFC converter coupled to an AC input, a DC-DC converter coupled between the PFC converter and a DC output, and a controller configured to control switching operation of the DC-DC converter. A pulse modulator is coupled to an output of the PFC converter to receive a signal representative of voltage ripple at the output of the PFC converter, and is configured to modulate a pulse signal based on an amplitude of the voltage ripple. A pulse demodulator is coupled to the pulse modulator to receive the modulated pulse signal, and is configured to demodulate the modulated pulse signal and provide a demodulated signal to adjust switching operation of the DC-DC converter. Also disclosed are methods for controlling isolated AC-DC power supplies.

Inventors:
DENG, Shijie (14/F Lu Plaza, 2 Wing Yip StreetKwun Ton, Kowloon Hong Kong, Kong, CN)
LIU, Qingfeng (14/F Lu Plaza, 2 Wing Yip StreetKwun Ton, Kowloon Hong Kong, Kong, CN)
LI, Guangquan (14/F Lu Plaza, 2 Wing Yip StreetKwun Ton, Kowloon Hong Kong, Kong, CN)
ZHOU, Zhaofu (14/F Lu Plaza, 2 Wing Yip StreetKwun Ton, Kowloon Hong Kong, Kong, CN)
Application Number:
CN2016/097652
Publication Date:
March 08, 2018
Filing Date:
August 31, 2016
Export Citation:
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Assignee:
ASTEC INTERNATIONAL LIMITED (14/F Lu Plaza, 2 Wing Yip StreetKwun Ton, Kowloon Hong Kong, Kong, CN)
International Classes:
H02M7/12
Foreign References:
CN103346684A2013-10-09
CN102480816A2012-05-30
CN102089957A2011-06-08
CN101151791A2008-03-26
Attorney, Agent or Firm:
TDIP & PARTNERS (Room 1304-05, A Zhizhen BuildingNo. 7 Zhichun Road, Haidian District, Beijing 1, 100191, CN)
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