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Rotary electric machine laminated core

A technology for a rotating electrical machine and an iron core, which is applied in the structural field of a laminated iron core, can solve the problems of reduced efficiency of the rotating electrical machine, increased torque ripple, and reduced shape accuracy, and achieves the effects of improving characteristics, reducing machining deformation, and improving productivity.

Active Publication Date: 2012-12-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned conventional laminated iron core, since the mating and abutting portions of the core pieces are formed by notch bending, there is a problem that deformation occurs at a position corresponding to the bending fulcrum of notch bending, and the shape accuracy cannot be corrected. The reduction or local magnetostriction, so that the efficiency of the rotating machine is reduced or the torque ripple becomes larger

Method used

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  • Rotary electric machine laminated core
  • Rotary electric machine laminated core
  • Rotary electric machine laminated core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] figure 1 It is a plan view showing the rotating electric machine according to Embodiment 1 of the present invention. In the figure, a cylindrical stator 2 is held in a cylindrical case 1 . The stator 2 has: a laminated core 3 ; a drive coil 4 wound around the laminated core 3 ; and an insulator 5 interposed between the laminated core 3 and the drive coil 4 .

[0034] A rotor 6 is arranged inside the stator 2 . The rotor 6 is held by the housing 1 so as to be rotatable relative to the stator 2 . The rotor 6 has a plurality of permanent magnets 7 fixed to its outer periphery and facing the stator 2 .

[0035] figure 2 is showing figure 1 A top view of the laminated core 3, image 3 is showing figure 1 A perspective view of the laminated core 3, Figure 4 is showing figure 1 A plan view of the laminated core 3 in the middle of assembly. Such as Figure 4 As shown, the laminated core 3 is constituted by combining a plurality (two in this example) of arc-shape...

Embodiment approach 2

[0050] Next, Figure 10 It is a plan view showing important parts of a laminated iron core of a rotating electrical machine according to Embodiment 2 of the present invention, and is the same as that of Embodiment 1. Figure 9 corresponding figure. In addition, the same code|symbol is used for the same or equivalent part as Embodiment 1, and description is abbreviate|omitted.

[0051] In the drawing, a flat portion 13h perpendicular to the magnetic pole tooth portion 13b is provided on the outer peripheral surface of the back yoke portion 13a on the radially outer side of the rotary electric machine. The flat portion 13h of each core piece 13 is provided in a state in which the divided laminated core 11 is linearly developed so that the magnetic pole teeth 13b are parallel, that is, in the state of pressing the divided laminated core 11 in the first embodiment. The flat portions 13h are located on the same straight line.

[0052] In such a laminated iron core of a rotating ...

Embodiment approach 3

[0054] Next, Figure 11 It is a plan view showing important parts of the laminated iron core of the rotating electric machine according to Embodiment 3 of the present invention, Figure 12 is to show the Figure 11 A plan view of the state where the divided laminated core 11 is unfolded in a straight line, Figure 11 and Figure 12 are the same as those of Embodiment 1 Figure 5 and Figure 9 corresponding figure. In addition, the same code|symbol is used for the same or equivalent part as Embodiment 1, 2, and description is abbreviate|omitted.

[0055] In the drawing, a holding protrusion 13i is provided at the second end of the back yoke 13a, and the holding protrusion 13i comes into contact with the protrusion 13c when the core block 12 is closed into a ring shape or an arc shape. The holding protrusion 13i is provided at the outer peripheral end of the notch 13g. In addition, when the divided laminated core 11 is unfolded in a straight line, the holding protrusion 1...

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Abstract

In a rotary electric machine laminated core, a rotating shaft portion is disposed closer to an outer circumferential surface than an inner circumferential surface of a back yoke portion. A notch portion is disposed on at least one of first and second end portions of the back yoke portion so as to form a gap between a vicinity of the rotating shaft portion of a projecting portion and a recess portion when core segments are arranged in an annular shape or a circular arc shape. The first end portion and the second end portion of the back yoke portion are configured such that a predetermined gap that connects from the outer circumferential side to the inner circumferential side is formed between adjacent projecting portions and recess portions when the core segments are expanded rectilinearly such that magnetic pole tooth portions are parallel to each other.

Description

technical field [0001] The present invention relates to a structure of a laminated core of a rotating electrical machine, and more particularly to improvement of the characteristics and productivity of a laminated core having a structure in which plate-shaped core pieces are laminated and integrated while end portions are connected to each other. Background technique [0002] A conventional laminated core of a rotating electric machine is configured by connecting a plurality of core blocks formed by laminating a plurality of core pieces in the circumferential direction. In addition, when manufacturing such a laminated core, a plurality of first core members and a plurality of second core members are alternately laminated. Each first core member is formed by connecting a plurality of core pieces in a row. In addition, each second core member is configured by connecting a plurality of core pieces opposite to the core pieces of the first core member in a row. [0003] Each co...

Claims

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Application Information

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IPC IPC(8): H02K1/18
CPCH02K1/148H02K1/18
Inventor 桥本昭中原裕治秋田裕之市川崇敬
Owner MITSUBISHI ELECTRIC CORP
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