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Coil forming device and coil forming method

A technology of coils and forming dies, which is applied to electromechanical devices, the shape/style/structure of winding conductors, and the manufacture of electric generators, etc. It can solve problems such as complex processes, achieve good formability, and prevent damage

Inactive Publication Date: 2018-08-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in a rotating electric machine using distributed winding coils, the process of installing the coils on the stator core is complicated, and it is desired to improve the assemblability of the coils and the stator.

Method used

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  • Coil forming device and coil forming method
  • Coil forming device and coil forming method
  • Coil forming device and coil forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0107] Hereinafter, a coil forming device and a coil forming method according to Embodiment 1 of the present invention will be described using the drawings.

[0108] figure 1 It is a schematic perspective view of the stator 100 according to Embodiment 1 of the present invention.

[0109] figure 2 It is a schematic cross-sectional view obtained by cutting the stator 100 perpendicular to the axial direction.

[0110] image 3 (a) is a perspective view of the split core 20 constituting the stator core 2 .

[0111] image 3 (b) is a plan view of the split core 20 .

[0112] In the description of the stator 100 in this specification, unless otherwise specified, terms such as "axial direction", "circumferential direction", "radial direction", "inner peripheral side", "outer peripheral side", "inner peripheral surface ", "outer peripheral surface", "inner side" and "outer side", it refers to the "axial direction", "circumferential direction", "radial direction", "inner periphera...

Embodiment approach 2

[0210] Hereinafter, a coil forming device and a coil forming method according to Embodiment 2 of the present invention will be described focusing on parts different from Embodiment 1 using the drawings.

[0211] Figure 20 is a sectional view of main parts of the stator 200 .

[0212] Such as Figure 20 As shown, the coil 204 is a trapezoidal coil whose cross section is shaped to follow the shape of the slot 5 in order to increase the space factor of the slot 5 .

[0213] Next, a method of forming the coil 204 will be described. Figure 20 The illustrated cross-sectional shape of the stator core 2 perpendicular to the axial direction of the slot 5 is a trapezoidal shape expanding outward, so the cross-sectional shape of the slot housing portions 241a1 to 241b2 of the coil 204 perpendicular to the longitudinal direction is also shaped as trapezoidal shape. In addition, the cross-sectional shape of the slot housing portion 41 is not limited to a trapezoidal shape but may be,...

Embodiment approach 3

[0232] Hereinafter, a coil forming device and a coil forming method according to Embodiment 3 of the present invention will be described focusing on parts different from Embodiments 1 and 2 using the drawings.

[0233] Similar to Embodiment 2, the coil 304 used in this embodiment is a coil 304 in which the cross section of the slot housing portion is shaped to follow the shape of the slot 5 in order to increase the space factor with respect to the slot 5 . Hereinafter, a method for forming the coil 304 will be described. Here, similarly to Embodiment 2, a case of a trapezoidal cross-sectional shape will be described.

[0234] Figure 28 It is a flowchart showing the outline of the process of forming the coil 304 . Using the straight wire 3, first form the middle coil 306 of the planar winding shape by the same method as that of the first embodiment, and then carry out the cross-sectional shape molding of the slot accommodation parts of the four middle coils 306 simultaneous...

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Abstract

A coil forming device (50) has a plurality of forming dies (1S-4S) capable of rotating about the center of curvature of an inner peripheral surface, the center of curvature being aligned with the axis(P) of a rotating shaft; a plurality of clamping dies (1C-4C) capable of rotating about the center of curvature of an inner peripheral surface, the center of curvature being aligned with the axis (P)of the rotating shaft; a drive mechanism (52) for rotationally driving the forming dies and the clamping dies; and a drive direction change mechanism (51) for changing the rotational direction of theforming dies (1S-4S) and the clamping dies (1C-4C). A forming die and a clamping die which form a pair and which grip, from both sides in the circumferential direction, the rectilinear sections (61a1-61b2) of a coil preform (6) having been subjected to plane bending have the same width in the radial direction of the coil forming device (50). The forming dies and the clamping dies, the forming andclamping dies gripping a plurality of rectilinear sections (61a1-61b2) arranged from the inner peripheral side to the outer peripheral side of the coil forming device (50), are alternately arranged in the circumferential direction with the rectilinear sections (61a1-61b2) therebetween.

Description

technical field [0001] The present invention relates to a coil forming device and a coil forming method for forming a coil of a stator of a rotating electrical machine, and more particularly to a coil forming device and a coil forming method that contribute to the improvement of productivity and the improvement of the quality of the coil in the forming process of distributed winding coils . Background technique [0002] In recent years, rotating electrical machines such as electric motors and generators have to be used in various applications, and improvements in productivity and quality are expected. In particular, in a rotating electrical machine using distributed winding coils, the process of arranging the coils on the stator core is complicated, and it is desired to improve the assemblability of the coils and the stator. [0003] As a stator capable of improving the workability of the assembling process of providing coils to the stator core, a stator produced by concent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/04
CPCH02K15/0464H02K15/064H02K3/12H02K3/28H02K15/0414H02K15/045
Inventor 本石直弘川村浩司增田尚俊泷泽勇二
Owner MITSUBISHI ELECTRIC CORP