Title:
LAMINATED IRON CORE TRANSFORMER WITH IMPROVED IRON LOSS CHARACTERISTICS AND NOISE CHARACTERISTICS AND MANUFACTURE AND MANUFACTURING FACILITIES THEREOF
Document Type and Number:
Japanese Patent JP3709737
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain improved iron loss characteristics and noise characteristics by providing two dimensional distortion regions or repeated regions of one dimensional linear distortion at a specific area ratio in T-junction regions of leg electromagnetic steel sheets contiguous with yokes at the T-junction parts.
SOLUTION: Distortion regions are provided at both end parts of electromagnetic steel plates constructing an iron core, especially of leg steel sheets 1 contiguous with yokes 2 at the T-junction parts 3. Here, the size of the distortion region is defines in distortion region area %. Namely, it is a value equal to ten times the area of the distortion region divided by the area of the T-junction part 3 region of the steel sheets of the leg part. Two dimensional distortion or repeated linear distortion is provided in the distortion region. Further, as the distortion region area ratio, at least 10% is required. Moreover, the distortion is provided by a roll pressure at both end parts of the leg steel sheets contiguous with the yokes at the T-junction parts.
Inventors:
Michio Komatsubara
Masayoshi Ishida
Masayoshi Ishida
Application Number:
JP9867599A
Publication Date:
October 26, 2005
Filing Date:
April 06, 1999
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
H01F27/245; H01F41/02; H01F27/33; (IPC1-7): H01F27/33; H01F27/245; H01F41/02
Domestic Patent References:
| JP54084229A |
Attorney, Agent or Firm:
Kosaku Sugimura
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