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Stator of slewing electric machine

A rotary motor and stator technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of increasing electromagnetic noise, inability to increase the overall rigidity of the coil end, and small elastic modulus, reducing electromagnetic noise and improving Rigidity and the effect of preventing exposure of the joint

Inactive Publication Date: 2009-05-20
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the stator of a conventional vehicle alternator, since the single insulating layer formed by coating the welding part covering the stator winding is made of silicone resin with a small elastic modulus, there is a problem that the overall size of the coil end cannot be enlarged. Rigidity, electromagnetic noise caused by the vibration of the stator caused by the magnetic attraction force between the stator and the rotor increases

Method used

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  • Stator of slewing electric machine
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  • Stator of slewing electric machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a perspective view showing main parts of the stator of the rotary electric machine according to Embodiment 1 of the present invention, figure 2 It is a cross-sectional view showing main parts of the stator of the rotary electric machine according to Embodiment 1 of the present invention, image 3 It is a plan view of main parts of the stator of the rotary electric machine according to Embodiment 1 of the present invention viewed from the inner diameter side, Figure 4 A cross-sectional view illustrating the insulation structure of the joint portion of the stator winding in the stator of the rotary electric machine according to Embodiment 1 of the present invention, Figure 5 for Figure 4 The V-V cross-sectional view of the Figure 6 It is a perspective view for explaining a conductor portion suitable for a stator winding in a stator of a rotary electric machine according to Embodiment 1 of the present invention. Also, for the sake of illustration, ...

Embodiment 2

[0058] Figure 8 A cross-sectional view illustrating the insulation structure of the stator winding in the stator of the rotary electric machine according to Embodiment 2 of the present invention, Figure 9 for Figure 8 The IX-IX direction view sectional view.

[0059] In Example 2, the insulating layer 7A adopts a two-layer structure of a first insulating layer 8A made of epoxy resin and a second insulating layer 9A made of silicone resin, as shown in Figure 8 and Figure 9 As shown, the first insulating layer 8A covers each joint portion 6 (area melted and integrated), and coats and forms a form spanning the joint portions 6 adjacent in the radial direction and the circumferential direction, and the second insulating layer 9A covers The first insulating layer 8A and the insulating coating-removed regions of the respective end portions 4c are covered and coated to form a form spanning the joint portion 6 and the first insulating layer 8A adjacent in the radial and circum...

Embodiment 3

[0065] In Embodiments 1 and 2 above, the U-shaped conductor portion 4 is used as a wire bundle to constitute the stator winding 3 , but in Embodiment 3, the stator winding 16 is formed using the continuous conductor wire 30 as a wire bundle.

[0066] Figure 10 It is a perspective view showing a stator of a rotary electric machine according to Embodiment 3 of the present invention, Figure 11 It is a perspective view showing a state in which the cover body of the stator of the rotary electric machine according to Embodiment 3 of the present invention is not installed, Figure 12 It is an end view showing the periphery of the attached connecting wire part when the cover body of the stator of the rotary electric machine according to Embodiment 3 of the present invention is not installed when viewed from the axially outer side, Figure 13 It is an end view schematically showing a phase winding of the stator winding in the stator of the rotary electric machine according to Embodi...

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Abstract

To obtain a stator of a rotary electric machine wherein electromagnetic noise can be reduced and further electrical insulating properties can be secured.A stator winding is manufactured by inserting a U-shaped conductor segment into a slot from the first end face side of a stator core, and welding ends of the conductor segments to each other exposed to the second end face side of the stator core. Joints 6 between the ends of the conductor segments are disposed circumferentially and annularly in two rows on the second end face side of the stator core. Epoxy resin is applied so that the resin covers each joint 6 and the resin bridges two adjacent joints in the radial direction and forms a first insulating layer 8. Silicone resin is applied so that the resin covers the first insulating layer 8 and extends to the insulating coating 401 of the conductor segments 4, forming a second insulating layer 9.

Description

technical field [0001] The present invention relates to an insulation structure of a stator of a rotary electric machine that ensures insulation by covering the surface of a joint portion of conductor wires constituting a stator winding with an insulating resin. Background technique [0002] In the stator of a conventional vehicle alternator, a U-shaped conductor portion is inserted from one end side of the stator core in the axial direction into each slot pair, and the conductor portion extends to the other axial end side of the stator core. The ends of the stator windings are welded to each other to form a corrugated winding. In addition, silicone resin is applied to cover the soldered portion of the conductor portion to form a single insulating layer. Since the elastic modulus of silicone resin is small, it can reduce the cracking and peeling of the insulating layer caused by the difference in expansion rate between the welded part and the insulating layer, so it can sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/32H02K3/04H02K3/34H02K3/38H02K3/50
CPCH02K3/50H02K3/38Y10T29/49073
Inventor 大桥篤志
Owner MITSUBISHI ELECTRIC CORP
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