Title:
NEUTRAL-POINT EARTHING REACTOR HAVING MAGNETISM ENHANCEMENT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2022/213550
Kind Code:
A1
Abstract:
Disclosed in the present invention is a neutral-point earthing reactor having a magnetism enhancement structure. The neutral-point earthing reactor comprises an oil tank, a hollow coil, which is arranged inside the oil tank and has no core limb, and a rectangular iron yoke, wherein four iron yoke edges are sequentially connected end to end, and comprise an upper yoke located at the top of the hollow coil, a first side yoke located on one side of the coil, a lower yoke located at the bottom of the hollow coil and a second side yoke located on the other side of the coil; the first side yoke, the second side yoke and the center axis of the coil are parallel and coplanar; and the center axis of the coil passes through the center point of the iron yoke, and magnetic lines of force generated after the coil is energized all pass through the iron yoke. An aluminum shielding cylinder in the prior art is replaced with the iron yoke made of a silicon steel sheet, and since the silicon steel sheet has high magnetic permeability, a magnetic circuit outside the coil can be closed, such that the reactance of the same coil is greater, and a magnetism enhancement effect is achieved. Resistance loss and eddy current loss are small such that the number of turns of the coil can be smaller, thereby saving on copper wires and greatly reducing costs.
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Inventors:
YU YUNCHANG (CN)
YU DONGZE (CN)
YU DONGZE (CN)
Application Number:
PCT/CN2021/119316
Publication Date:
October 13, 2022
Filing Date:
September 18, 2021
Export Citation:
Assignee:
WUJIANG TRANSF CO LTD (CN)
International Classes:
H01F27/245; H01F27/34; H01F27/36
Foreign References:
| CN204904990U | 2015-12-23 | |||
| CN104485207A | 2015-04-01 | |||
| CN211265250U | 2020-08-14 | |||
| CN207602369U | 2018-07-10 | |||
| CN104319082A | 2015-01-28 | |||
| CN205050685U | 2016-02-24 | |||
| US4485368A | 1984-11-27 |
Attorney, Agent or Firm:
SUZHOU JINMAI INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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