Title:
FIVE-LEVEL CONVERTER
Document Type and Number:
WIPO Patent Application WO/2020/119407
Kind Code:
A1
Abstract:
Disclosed is a five-level converter, comprising four switching tubes with drains and sources connected with each other in series. Driving signals of the switching tubes are all controlled by a unified clock. The switching tube S2 always starts to be switched on within a short period of time before the switching tube S1 is switched on, and starts to be switched off within a short period of time after the switching tube S1 is switched off. The switching tube S3 always starts to be switched on within a short period of time before the switching tube S4 is switched on, and starts to be switched off within a short period of time after the switching tube S4 is switched off. The converter reduces voltage stress between the drains and the sources of the various switching tubes by controlling the time sequence of the switching on and switching off of the various switching tubes, and can realize a uniform voltage without a pre-charging process, thus the advantages of a traditional five-level converter can be maintained; moreover, nonuniform voltage stress is not present in the switching tubes during a circuit starting process, and the voltage stress of the various switching tubes can be naturally balanced and reduced.
Inventors:
ZHANG ZHONGBAO (CN)
LIU XIANG (CN)
HE LEI (CN)
LIU XIANG (CN)
HE LEI (CN)
Application Number:
PCT/CN2019/119638
Publication Date:
June 18, 2020
Filing Date:
November 20, 2019
Export Citation:
Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
H02M3/158
Foreign References:
| CN109639144A | 2019-04-16 | |||
| CN204947922U | 2016-01-06 | |||
| CN105103428A | 2015-11-25 | |||
| KR101712445B1 | 2017-03-22 |
Other References:
OMID BEIK ET AL: "A New Modular Neutral Point Clamped Converter with Space Vector Modulation Control", 2018 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT), 22 February 2018 (2018-02-22), pages 591 - 595, XP033336725, DOI: 10.1109/ICIT.2018.8352244
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
Download PDF:
Previous Patent: AUTOMATIC FOLDABLE DINING TABLE
Next Patent: POWER SUPPLY CIRCUIT AND PHOTOVOLTAIC POWER GENERATION SYSTEM COMPRISING SAME
Next Patent: POWER SUPPLY CIRCUIT AND PHOTOVOLTAIC POWER GENERATION SYSTEM COMPRISING SAME