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Title:
MULTI-INPUT POWER CONVERTER AND CONTROL METHOD THEREFOR, AND UNINTERRUPTIBLE POWER SUPPLY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2021/068751
Kind Code:
A1
Abstract:
The present invention provides a multi-input power converter and a control method therefor, and an uninterruptible power supply comprising same. The multi-input power converter comprises: a first capacitor and a second capacitor connected in series between a positive direct current bus and a negative direct current bus, a node formed by connecting the first capacitor and the second capacitor being a neutral point; a T-type neutral point-clamped converter assembly, comprising a first T-type neutral point-clamped converter and a second T-type neutral point-clamped converter which are connected in parallel between the positive direct current bus and the negative direct current bus; an alternating current switch assembly connected between an input end of the T-type neutral point-clamped converter assembly and an alternating current; and a first direct current switch assembly, which is used for connecting or disconnecting a rechargeable battery for selective power supply/charging, and is connected between input ends of the first and second T-type neutral point-clamped converters and two ends of the rechargeable battery. The multi-input power converter of the present invention can realize bidirectional flow of energy, realize soft switching of power, and have a low cost.

Inventors:
CAO LEI (CN)
ZHENG DAWEI (CN)
LIU DAN (CN)
Application Number:
PCT/CN2020/117339
Publication Date:
April 15, 2021
Filing Date:
September 24, 2020
Export Citation:
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Assignee:
SANTAK ELECTRONIC SHENZHEN CO LTD (CN)
International Classes:
H02M3/335; H02J9/06
Foreign References:
CN110995001A2020-04-10
CN103368231A2013-10-23
CN103368231A2013-10-23
CN107408835A2017-11-28
CN207021747U2018-02-16
US10044220B22018-08-07
Attorney, Agent or Firm:
PANAWELL & PARTNERS, LLC (CN)
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