Title:
THREE-LEVEL NPC CONVERTER USING ZIGZAG TRANSFORMER FOR REDUCING CAPACITOR RIPPLE
Document Type and Number:
WIPO Patent Application WO/2023/096252
Kind Code:
A1
Abstract:
The present invention relates to an AC/DC power conversion device comprising: an AC system grid; a switching unit connected to the AC system grid and carrying out a switching operation; and a DC link end provided with a first capacitor (C1) outputting a voltage of an upper level (node H) with respect to a reference point N, and a second capacitor (C2) outputting a voltage of a lower level (node L) with respect to the reference point N, wherein a zigzag transformer is connected to the AC system grid, and a neutral point of the zigzag transformer is connected to a connection point (Z) of the first capacitor (C1) and the second capacitor (C2).
Inventors:
JUNG JAE JUNG (KR)
SONG GEUM SEOP (KR)
CUI SHENG HUI (KR)
SONG GEUM SEOP (KR)
CUI SHENG HUI (KR)
Application Number:
PCT/KR2022/018050
Publication Date:
June 01, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
KYUNGPOOK NAT UNIV IND ACADEMIC COOP FOUND (KR)
International Classes:
H02M7/12; H02M1/00; H02M1/12; H02M1/14; H02M7/04
Foreign References:
| KR20020081820A | 2002-10-30 | |||
| CN203377805U | 2014-01-01 | |||
| KR101967734B1 | 2019-04-10 | |||
| US20130044522A1 | 2013-02-21 | |||
| US20200274443A1 | 2020-08-27 |
Attorney, Agent or Firm:
KIM, Il Hwan (KR)
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