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AC generator for vehicle

A technology for alternators and vehicles, which is applied in the direction of electrical components, electromechanical devices, electric components, etc. It can solve the problems of reduced insulation performance, hindering the heat dissipation of conductors, and practical impossibility, so as to reduce the axial height and improve the electric resistance Chemical corrosion resistance, effect of securing insulation

Active Publication Date: 2006-07-26
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, it is well known that the electrical conductor of the stator is usually composed of a conductor with a coating, and the insulating layer obviously hinders the heat dissipation of the electrical conductor.
However, it is practically impossible to abolish the above-mentioned insulating layer or simply reduce the thickness of the insulating layer because the insulation performance will be reduced.

Method used

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  • AC generator for vehicle
  • AC generator for vehicle
  • AC generator for vehicle

Examples

Experimental program
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Effect test

Embodiment approach 1

[0018] Now refer to figure 1 The automotive alternator according to Embodiment 1 of the present invention will be described.

[0019] The car uses an alternator 20 such as figure 1 As shown, it includes: a front bearing frame 21 made of approximately bowl-shaped aluminum with good heat transfer performance and a casing 23 made of a rear bearing frame 22; it is arranged in the casing 23 and a pulley 24 is fixed at one end. shaft 26; a drum (rundle) rotor 27 fixed to the shaft 26; a fan 25 fixed to both axial ends of the rotor 27; a stator 40 fixed to the casing 23 as surrounding the rotor 27; The slip ring 28 that supplies current to the rotor 27 at the other end of the above-mentioned shaft 26; a pair of brushes 29 that slide on the surface of the slip ring 28; the brush holder 30 that places the brush 29; is electrically connected with the stator 40 and will A rectifier 31 for rectifying the alternating current generated on the stator 40 into a direct current;

[0020] The...

Embodiment approach 2

[0032] According to Embodiment 2, such as Figure 6 As shown, before inserting into the slot 41c, the slot placement portion 44a of the coil unit is made into an approximately rectangular cross-section with the short side in the radial direction and the long side in the circumferential direction, and is arranged in two rows close to each other in the radial direction. In addition, in the figure, 47 represents the insulating resin impregnated in order to form the above-mentioned coil unit.

[0033] In this way, since the conductor of the groove placement portion 44a can be placed in the circumferential direction in the groove 41c without gaps, at this time, at the position where the insulating coating layer is thinned and the circumferential direction is the long side, it can also be placed along the radial direction. Arranging the aforementioned conductors closely increases the density of the conductors in the slot 41c, so that the heat generated by the conductors can be effic...

Embodiment approach 3

[0035] According to Embodiment 3, it is constituted as, for example Figure 7 As shown, before being inserted into the slot 41c, the slot placement portion 44a of the coil unit is made into an approximately rectangular cross-section with the long side in the radial direction and the short side in the circumferential direction, and is arranged in a row close to each other in the radial direction. Also in this way, the conductors of the groove placement portion 44a can be placed in the circumferential direction in the groove 41c without gaps.

[0036] In this case, since the insulating coating layer is thinned at the long sides in the radial direction, the heat transfer surfaces at both ends of the tooth-shaped portion of the laminated core can be ensured at the long sides in the radial direction. , because the heat of the armature coil generated by power generation is effectively dissipated to the outer circle side of the laminated core through the two ends of the tooth-shaped ...

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PUM

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Abstract

The invention discloses inductor which forms the coil patterns on the predetermined layer in the overlapped plural insulation layers. The coil pattern is formed on at least two insulation layers and the coil patterns are electrically connected. The constitution improves the inductor Q value without a large-size.

Description

technical field [0001] The present invention relates to, for example, an alternator driven by an internal combustion engine, and particularly relates to a stator structure of an automotive alternator mounted on vehicles such as cars and trucks. Background technique [0002] In recent years, automotive alternators have been increasingly required to be compact, high output, insulation, and electrochemical corrosion resistance, and various improvements have been proposed to achieve this. In terms of improving power generation capacity, a solution is shown in Japanese Patent Application Laid-Open No. 11-164505: in the transition portion of the conductor, the conductors are spaced apart from each other, and the thickness of the insulating layer is made smaller than that in the transition portion of the conductor. The thickness of the insulating layer of the placement part in the groove is thin, thereby improving the cooling performance of the transition part of the conductor, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K3/12H02K3/34H02K3/38H02K3/44
CPCH02K3/34H02K3/38H02K3/44H02K3/345H02K3/12Y10T29/49009Y10T29/49073
Inventor 柏原利昭田中和德田村修一大西行仪大田顺一
Owner MITSUBISHI ELECTRIC CORP
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