Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DIRECTIONAL ELECTRICAL STEEL SHEET, WOUND TRANSFORMER CORE USING THE SAME, AND METHOD FOR MANUFACTURING WOUND CORE
Document Type and Number:
WIPO Patent Application WO/2019/151399
Kind Code:
A1
Abstract:
Provided is a directional electrical steel sheet which is excellent in the reduction effect of transformer core loss when used for a wound core of a transformer. In the directional electrical steel sheet for use in a wound core of a transformer, the thickness t of the steel sheet and the iron loss deterioration rate when the steel sheet is subjected to elliptical magnetization defined by the following formula (1) satisfy the following relationship. When the thickness t ≤ 0.20 mm, the iron loss deterioration rate is 60% or less, when 0.20 mm < t < 0.27 mm, the iron loss deterioration rate is 55% or less, and when 0.27 mm ≤ t, the iron loss deterioration rate is 50% or less (iron loss deterioration rate when elliptical magnetization is applied) = ((WA - WB)/WB) × 100 ... (1). In the formula (1), WA is iron loss in the case where 50 Hz elliptical magnetization of 1.7 T and 0. 6 T is applied in the RD direction (rolling direction) and TD direction (perpendicular to the rolling direction), respectively, and WB is iron loss in the case where 50 Hz alternating magnetization of 1.7 T is applied in the RD direction.

More Like This:
JPS54106018LOW TEMPERATURE FUSION MAGNETIC ALLOY
JP3492075NON-ORIENTED MAGNETIC STEEL PLATE WITH HIGH MAGNETIC FLUX DENSITY/LOW IRON LOSS, WHICH IS SUPERIOR IN HEAT CONDUCTIVITY, AND ITS MANUFACTURE
JP3151201INDUSTRIAL APPLICABILITY: Tungsten-based sintered alloy powder and a method for producing the same.
Inventors:
INOUE HIROTAKA (JP)
OKABE SEIJI (JP)
OMURA TAKESHI (JP)
Application Number:
PCT/JP2019/003399
Publication Date:
August 08, 2019
Filing Date:
January 31, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFE STEEL CORP (JP)
International Classes:
H01F1/147; C21D8/12; H01F27/245; H01F41/02; C22C38/00; C22C38/60
Foreign References:
JPH06136552A1994-05-17
JPH06220541A1994-08-09
JPH06100997A1994-04-12
JP2005240079A2005-09-08
JP2012126973A2012-07-05
JPS6253579B21987-11-11
JPH0369968B21991-11-06
JP5286292B22013-09-11
JPH03268311A1991-11-29
JPS5750820B21982-10-29
Other References:
THE TRANSACTIONS OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN. D, vol. 130, no. 9, 2010, pages 1087 - 1093
THE PAPERS OF TECHNICAL MEETING ON MAGNETICS, INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, 2004, pages 27 - 31
See also references of EP 3726543A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: ELECTROCONDUCTIVE PRESSURE-SENSITIVE ADHESIVE TAPE

Next Patent: COMPOUND, RESIN, COMPOSITION, METHOD FOR FORMING RESIST PATTERN, METHOD FOR FORMING CIRCUIT PATTERN,...