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Method for lamination of an electrical strip for transformer cores

A technology of core silicon steel and silicon steel sheet, which is applied in transformer/inductor parts, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of large mechanical load of materials, reduce the electromagnetic characteristics of iron core silicon steel sheet, etc., and achieve eddy current loss Reduced, reduced eddy current, high mechanical stability effect

Inactive Publication Date: 2009-05-20
SIEMENS AG
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Problems solved by technology

[0011] In all methods of the prior art and in the structure of the used core silicon steel sheet, the disadvantage is that the width of the core silicon steel sheet produced in this way must not be less than a minimum thickness of 0.23 mm, because otherwise the material will be mechanically damaged during core processing. overload
This leads to a reduction in the electromagnetic properties of this mechanically loaded core silicon steel sheet
Therefore, based on the stated limitations in processing technology, it has hitherto not been possible to further reduce the eddy current losses associated with such a width of the core laminations in transformer cores correspondingly laminated with these laminations

Method used

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  • Method for lamination of an electrical strip for transformer cores
  • Method for lamination of an electrical strip for transformer cores
  • Method for lamination of an electrical strip for transformer cores

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Embodiment Construction

[0027] figure 1 A schematic diagram showing the manufacturing method of laminated silicon steel sheets 10, 11, 12 according to the present invention. A central silicon steel sheet 10 is sprayed with a fixing agent 50 and either already has a metallurgically treated surface or has an additionally applied insulating layer 20 (not shown). The adhesive material applied to the outer insulating layer of the central silicon steel sheet 10 forms the connection layer 30 , on which the other silicon steel sheets 11 , 12 are applied on the upper and lower sides of the central silicon steel sheet 10 . Between the insulating layers 20, 21, 22 of each silicon steel sheet 10, 11, 12, the connection layer 30 formed in this way is compacted by a pressure roller 40, and thus a permanent and long-lived connectivity layers. Thus, on the one hand, the mechanical stability of the produced core silicon steel sheet 60 is achieved. In addition, the lamination structure of the silicon steel sheets 1...

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Abstract

The invention relates to a method for production of ferromagnetic core laminates for electrical machines. The invention likewise relates to a ferromagnetic core laminate (16). Core laminates with very thin layers of the individual electrical strips can be produced by a structure formed from layers of the electrical strips (10, 11, 12) and by the electrical strips being connected by means of a connection layer (30), in particular an adhesive layer. This makes it possible to produce cores formed from layers of core laminate for electromagnetic machines, whose eddy-losses are reduced.

Description

technical field [0001] The invention relates to a method for producing a ferromagnetic core silicon steel sheet for an electrical machine. Background technique [0002] The operation of electromagnetic machines, such as power transformers or inductors, requires a precisely coordinated design of the electric machine with regard to the design and the materials used. Therefore, the cores of power and distribution network transformers are often made of grain-oriented ferromagnetic silicon steel. This is necessary because the time-dependent magnetic flux propagating in the core also causes electrical losses. On the one hand, the periodic reversal of the magnetization direction in the core produces remagnetization losses. Also, eddy currents oriented perpendicular to the propagating magnetic flux are induced within the core. Therefore, in order to reduce the eddy current loss, the transformer core is not solid, but is made of laminated ferromagnetic silicon steel with oriented ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/245H01F41/02H01F1/147
CPCH01F27/245H01F1/18H01F41/0233Y10T428/31678
Inventor 乔切恩·克里斯琴
Owner SIEMENS AG
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