Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MULTI-LEVEL INVERTER AND CONTROL METHOD FOR MULTI-LEVEL INVERTER
Document Type and Number:
WIPO Patent Application WO/2022/110904
Kind Code:
A1
Abstract:
The present application relates to the technical field of power electronics, and provided therein are a multi-level inverter, a control method for a multi-level inverter, and an uninterruptible power supply. The multi-level inverter comprises a converter bridge arm, an inverter circuit, and a controller. A positive input port of the inverter circuit is connected to a positive input port of the multi-level inverter, a negative input port of the inverter circuit is connected to a negative input port of the multi-level inverter, and an output end of the inverter circuit is connected to a positive output port of the multi-level inverter. The converter bridge arm comprises an upper half bridge arm and a lower half bridge arm, and a bridge arm midpoint is connected to a negative output port of the multi-level inverter. The controller controls, in a positive output period of the inverter circuit, the upper half bridge arm to be disconnected and the lower half bridge arm to be connected, and controls the upper half bridge arm to be connected and the lower half bridge arm to be disconnected in a negative output period. By using the present solution, the number of switch tubes used in an inverter circuit can be reduced by half, thus reducing the cost of the multi-level inverter.

Inventors:
JIANG ZHENGDONG (CN)
LU MAOYONG (CN)
HUANG ZHUYONG (CN)
Application Number:
PCT/CN2021/112418
Publication Date:
June 02, 2022
Filing Date:
August 13, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02M7/483; H02M7/5387
Foreign References:
CN112615556A2021-04-06
CN101917133A2010-12-15
CN101291078A2008-10-22
CN106169808A2016-11-30
Other References:
WANG FEI; HANG LIJUN; WANG YONG: "A novel five-level inverter for solar system", 2014 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION - APEC 2014, IEEE, 16 March 2014 (2014-03-16), pages 2936 - 2943, XP032590748, DOI: 10.1109/APEC.2014.6803722
"Chinese Master’s Theses Full-Text Database", vol. 12, 1 May 2018, article ZHANG, MEILING: "Research of Compound T Type Photovoltaic Grid Connected Inverter and Its Control", pages: 1 - 72, XP055934875
SIMONETTI DOMINGOS S. L.; YUAN XIBO: "Center-Tapped π-Type Single-Phase Cell", 2019 IEEE 15TH BRAZILIAN POWER ELECTRONICS CONFERENCE AND 5TH IEEE SOUTHERN POWER ELECTRONICS CONFERENCE (COBEP/SPEC), IEEE, 1 December 2019 (2019-12-01), pages 1 - 6, XP033758274, DOI: 10.1109/COBEP/SPEC44138.2019.9065693
NARENDRABABU A; YALLA NAVEEN; AGARWAL PRAMOD: "A modified T-type single phase five-level inverter with reduced switch voltage stress", 2018 INTERNATIONAL CONFERENCE ON POWER, INSTRUMENTATION, CONTROL AND COMPUTING (PICC), IEEE, 18 January 2018 (2018-01-18), pages 1 - 5, XP033358290, DOI: 10.1109/PICC.2018.8384775
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
Download PDF: