Title:
DIGITIZED VARIABLE-POLARITY WELDING POWER SOURCE BASED ON SIC IGBT
Document Type and Number:
WIPO Patent Application WO/2019/104864
Kind Code:
A1
Abstract:
Provided is a digitized variable-polarity welding power source based on SiC IGBT, comprising a main circuit and a control circuit. The main circuit comprises a three-phase rectifying filter circuit, a SiC IGBT primary inverter circuit, a high-frequency transformer, an SiC ultrahigh-frequency rectifying filter output circuit, an SiC IGBT secondary inverter circuit and a high-voltage arc stabilizing circuit which are sequentially connected. The control circuit comprises a controller and a power supply control module, and a digitizing tablet, a SiC primary inverter driving module and a SiC secondary inverter driving module which are in connection with the controller via signals. wherein the digitizing tablet, the SiC primary inverter driving module and the SiC secondary inverter driving module are electrically connected with the power supply control module; the SiC primary inverter driving module is further connected with the SiC IGBT primary inverter circuit; and the SiC secondary inverter driving module is further connected with the SiC IGBT secondary inverter circuit. According to the digitized variable-polarity welding power source, an electric arc can be easy to reburn after being extinguished, the size is small, the conversion efficiency is high, and work is reliable and stable.
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Inventors:
WANG ZHENMIN (CN)
WEI JUNHAO (CN)
WU JIANWEN (CN)
WEI JUNHAO (CN)
WU JIANWEN (CN)
Application Number:
PCT/CN2018/074686
Publication Date:
June 06, 2019
Filing Date:
January 31, 2018
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
B23K9/10; B23K9/073
Foreign References:
| CN207508489U | 2018-06-19 | |||
| CN1745952A | 2006-03-15 | |||
| CN1750899A | 2006-03-22 | |||
| CN101352776A | 2009-01-28 | |||
| CN106392262A | 2017-02-15 | |||
| US20140209586A1 | 2014-07-31 | |||
| US20170334011A1 | 2017-11-23 |
Attorney, Agent or Firm:
GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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