Stator core for rotating electric machine

A stator core and rotating motor technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of increased eddy current loss at the fastening part, deterioration of productivity, and no consideration of eddy current loss, etc., to achieve suppression of eddy current loss and suppression of eddy current loss The effect of increasing the increase and suppressing the decrease in lamination accuracy

Active Publication Date: 2014-12-24
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in order to join the sheet metals together by bonding, a process of applying an adhesive to each sheet metal is required, so productivity may deteriorate
[0010] In addition, in Patent Document 1, the position where the fastening portion is provided does not take into account the eddy current loss
That is, the fastening part is provided at a position corresponding to the teeth of the stator. At the teeth of the stator, the magnetic flux density generated when the coil is energized and the change of the magnetic flux density with time are relatively large, so the eddy current loss of the fastening part increases.

Method used

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  • Stator core for rotating electric machine
  • Stator core for rotating electric machine
  • Stator core for rotating electric machine

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Experimental program
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no. 1 approach

[0102] Such as figure 1 As shown, the stator core 1 of this embodiment is constituted by arranging a plurality of split cores 10 in an annular shape in the circumferential direction. The stator including the stator core 1 is combined with a rotor provided therein to form a rotating electrical machine (both not shown), and is used, for example, as a motor or a generator.

[0103] Each split core 10 is formed by punching a substantially T-shaped metal steel plate 12 punched out by a punching machine in the axial direction ( figure 1 The upper and lower directions in the middle) are stacked and formed separately. also refer to figure 2 (a), the split core 10 has: a back yoke 20 extending in an arcuate shape with a predetermined radial width; protruding radially inward from a circumferential middle portion of the back yoke 20, and spaced around the back yoke 20; The teeth 30 are wound with a coil (not shown) around an insulator or the like. Therefore, the split core 10 is for...

no. 2 approach

[0112] Next, a stator core 1 of a rotating electric machine according to a second embodiment of the present invention will be described. It should be noted that the basic structure of the stator core 1 of the second embodiment is the same as that of the first embodiment, and only the structure of the fastening portion is different. Therefore, the same reference numerals are attached to the same or corresponding parts to omit or simplify description.

[0113] Such as image 3 As shown, in the fastening portion 40A of the present embodiment, the protruding portion 41 and the recessed portion 42 have a triangular shape that protrudes radially inward when viewed from the axial direction.

[0114] In addition, the fastening portion 40A is similar to the fastening portion 40 of the first embodiment, and its circumferential end surfaces 43 and radial end surfaces 44 are formed to extend linearly in the axial direction, so that the fastening portion 40A is formed in a flat fastening s...

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PUM

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Abstract

A stator core for a rotating electric machine includes a plurality of split cores. Each of the plurality of split cores includes a back yoke, a tooth, and a single caulking portion. When each of the plurality of split cores is seen in an axial direction, two inner circumferential-side intersections and two outer circumferential-side intersections are defined, both circumferential-end surfaces of the tooth intersect an inner circumferential surface of the back yoke at the two inner circumferential-side intersections, virtual lines drawn by extending both the circumferential-end surfaces of the tooth intersect an outer circumferential surface of the back yoke at the two outer circumferential-side intersections, a central position of the caulking portion is disposed in an opposing angular region on a radially outer side out of four opposing angular regions defined by lines diagonally connecting the two inner circumferential-side intersections to the respective two outer circumferential-side intersections.

Description

technical field [0001] The present invention relates to a stator core for a rotating electrical machine. Background technique [0002] Patent Document 1 describes a core block formed by laminating a plurality of sheet metals. The plurality of sheet metals of the core block are fixed to each other and laminated by fastening at one location and bonding at a plurality of locations. [0003] In this way, by laminating the sheet metals together using the fastening portion and the adhesive, a good lamination state is maintained, and an increase in iron loss is suppressed by limiting the fastening portion to one location. [0004] 【Prior technical literature】 [0005] 【Patent Literature】 [0006] [Patent Document 1] Japanese Unexamined Patent Publication No. 2009-72014 [0007] 【Summary of Invention】 [0008] 【Problems to be solved by the invention】 [0009] However, in order to join the sheet metals together by bonding, a step of applying an adhesive to each sheet metal is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K1/18
CPCH02K1/148H02K1/02H02K1/14H02K2201/09
Inventor 宫岛一总梅津健太
Owner HONDA MOTOR CO LTD
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