Title:
POWER SUPPLY DEVICE AND POWER SUPPLY METHOD FOR DIRECT CURRENT ELECTRIC ARC FURNACE
Document Type and Number:
WIPO Patent Application WO/2020/249135
Kind Code:
A1
Abstract:
Provided in the present invention are a power supply device and a power supply method for a direct current electric arc furnace. The power supply device comprises a rectification phase-shift transformer, rectification units, and a regulator. By means of a structural design of a plurality of rectification units and a plurality of branch circuits of an output terminal of the rectification phase-shift transformer, and by means of a structural design of the outputs of the plurality of rectification units being connected in parallel and then connected to a power supply short network of the direct current electric arc furnace via a bus line, a current output topology structure is formed, able to provide a large, stable current for an electrode group. Power can also be supplied for a plurality of electrode groups by means of a plurality of current output topology structures, thereby being able to meet the greater power supply current requirements of direct current electric arc furnaces. The regulator determines to adjust the position of a top electrode on the basis of real-time working parameters, ensuring that a raising and lowering mechanism of the top electrode is able to exercise a stable electric arc burning function stably and for a long time. At the same time, the regulator regulates the output voltage and the output current of the rectification units on the basis of feedback of the real-time working parameters, providing a stable electric power source for the direct current electric arc furnace.
Inventors:
ZHANG YUCHUAN (CN)
HUANG QIMING (CN)
YANG NINGCHUAN (CN)
TAN CUNZHEN (CN)
HUANG QIMING (CN)
YANG NINGCHUAN (CN)
TAN CUNZHEN (CN)
Application Number:
PCT/CN2020/100889
Publication Date:
December 17, 2020
Filing Date:
July 08, 2020
Export Citation:
Assignee:
CISDI ENG CO LTD (CN)
CISDI RES & DEVELOPMENT CO LTD (CN)
CISDI RES & DEVELOPMENT CO LTD (CN)
International Classes:
H02M7/12
Foreign References:
| CN110247562A | 2019-09-17 | |||
| CN101782321A | 2010-07-21 | |||
| CN103269170A | 2013-08-28 | |||
| CN107131756A | 2017-09-05 | |||
| JP2006040619A | 2006-02-09 | |||
| CN202268814U | 2012-06-06 |
Other References:
See also references of EP 3985858A4
Attorney, Agent or Firm:
TIDYTEND INTELLECTUAL PROPERTY LAW FIRM (CN)
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