Title:
ONLINE UNINTERRUPTIBLE POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2018/040799
Kind Code:
A1
Abstract:
An online uninterruptible power supply comprises: a positive DC bus (B1) and a negative DC bus (B2); a push-pull circuit (26), comprising a positive input terminal, a negative input terminal, a transformer (TX) having a primary winding and a secondary winding, and a rectification circuit (261) having an input end thereof connected to the secondary winding and an output end thereof connected to the positive DC bus (B1) and the negative DC bus (B2); a charging winding (W1), wound at the primary side of the transformer (TX), having one end thereof connected to one end of the primary winding; a unidirectional controllable charging circuit (29), connected between the negative input terminal of the push-pull circuit (26) and the other end of the charging winding (W1); and a first switch transistor (Q4) and a second switch transistor (Q5), wherein the positive DC bus (B1) is connected via the first switch transistor (Q4) to one end of the secondary winding, and the other end of the secondary winding is connected via the second switch transistor (Q5) to the negative DC bus (B2). The online uninterruptible power supply reduces costs and enhances half-wave load capability.
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Inventors:
CAI HUOYUAN (CN)
ZHANG QIXIAO (CN)
HU SHUANGPING (CN)
ZHANG HUAICHAO (CN)
GAO PENG (CN)
ZHANG QIXIAO (CN)
HU SHUANGPING (CN)
ZHANG HUAICHAO (CN)
GAO PENG (CN)
Application Number:
PCT/CN2017/094226
Publication Date:
March 08, 2018
Filing Date:
July 25, 2017
Export Citation:
Assignee:
EATON MFG LP GLASGOW SUCCURSALE DE MORGES (CH)
CAI HUOYUAN (CN)
CAI HUOYUAN (CN)
International Classes:
H02M1/42; H02J9/06; H02M3/156
Foreign References:
| CN101699698A | 2010-04-28 | |||
| CN203674793U | 2014-06-25 | |||
| CN103683356A | 2014-03-26 | |||
| EP1005132A2 | 2000-05-31 |
Attorney, Agent or Firm:
PANAWELL & PARTNERS, LLC (CN)
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