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Patent Searching and Data


Title:
ZERO VOLTAGE SWITCHING BOOST CIRCUIT AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/192234
Kind Code:
A1
Abstract:
A zero voltage switching synchronous rectifying Boost circuit, a zero voltage switching Boost circuit (30), and a control method therefor; an auxiliary resonant circuit (40) is connected in series in a rectifying circuit of a main power circuit; once a main power switching tube (32) is turned off, the current of a Boost inductor (31) is used to achieve the zero-voltage conduction of an auxiliary switching tube (42); then, the resonance between a resonant capacitor (44) and a resonant inductor (41) is used to rapidly increase the current of the resonant inductor (41) and cause the current of the resonant inductor (41) to be greater than the current of the Boost inductor (31); and the flyback of the current of the resonant inductor (41) by a diode (43) connected in parallel with the resonant capacitor (44) is used to ensure that the voltage of the resonant capacitor (44) will not be reversed and that the current of the resonant inductor (41) will not rapidly decrease after reaching the maximum value. When the auxiliary switching tube (42) is turned off, the difference value between the resonant current and the current of the Boost inductor (31) is used to achieve the zero-voltage conduction of the main power switching tube (32).

Inventors:
YUAN YUAN (CN)
Application Number:
CN2019/070642
Publication Date:
October 10, 2019
Filing Date:
January 07, 2019
Export Citation:
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Assignee:
MORNSUN GUANGZHOU SCIENCE & TECH CO LTD (CN)
International Classes:
H02M3/158; H02M1/088
Foreign References:
CN108390567A2018-08-10
CN107612327A2018-01-19
CN1105488A1995-07-19
CN1309461A2001-08-22
US20150171775A12015-06-18
CN107086785A2017-08-22
Other References:
SAHA, S.S. ET AL.: "New Fully Soft-Switched Boost-Converter with Reduced Conduction Losses", 2005 INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVES SYSTEMS, vol. 1, 28 November 2005 (2005-11-28) - 18 April 2006 (2006-04-18), pages 107 - 112, XP010909714, ISSN: 7803-9296
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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