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AC generator for vehicle

A technology for alternators and vehicles, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of deterioration of electrical insulation and aggravation of thermal degradation, and achieve the effect of good heat dissipation and enlarged area

Active Publication Date: 2008-12-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the conventional alternator for vehicles, under the worst operating conditions, the temperature of the stator 8 exceeds the softening temperature of the varnish, resulting in increased thermal degradation and deterioration of electrical insulation

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0048] figure 1 is a sectional view showing the vehicle alternator according to Embodiment 1 of the present invention, figure 2 is a perspective view showing a stator of the vehicle alternator according to Embodiment 1 of the present invention, image 3 It is a partial cross-sectional view showing the slot-accommodated state of the stator winding in the stator of the vehicle alternator according to Embodiment 1 of the present invention, Figure 4 It is a main part side view showing the stator of the vehicle alternator according to Embodiment 1 of the present invention, Figure 5 It is a process drawing explaining the process of manufacturing the star winding unit in the manufacturing method of the stator of the automotive alternator which concerns on Embodiment 1 of this invention. Image 6 and Figure 7 are a perspective view and an enlarged view of main parts, respectively, showing a bisected winding unit in the stator of the vehicle alternator according to Embodiment 1...

Embodiment approach 2

[0084] Figure 10 is a perspective view showing a stator of a vehicle alternator according to Embodiment 2 of the present invention, Figure 11 It is a main part side view showing the stator of the vehicle alternator according to Embodiment 2 of the present invention, Figure 12 It is a partial cross-sectional view showing the slot-accommodated state of the stator winding in the stator of the vehicle alternator according to Embodiment 2 of the present invention, Figure 13 is a perspective view showing a single-phase winding in a stator of a vehicle alternator according to Embodiment 2 of the present invention, Figure 14 It is an enlarged view showing a main part of a single-phase winding in the stator of the vehicle alternator according to Embodiment 2 of the present invention.

[0085] Figure 10 to Figure 14 Among them, the stator 40A is composed of a stator core 41A and a stator winding 45A wound on the stator core 41A. The stator core 41A is produced in the same mann...

Embodiment approach 3

[0096] Embodiment 3 such as Figure 15 As shown, the entire area in the axial direction of the blade 5 a of the cooling fan 5 substantially overlaps the coil end groups 45 f and 45 r in the radial direction. In addition, other configurations are the same as those of Embodiment 2 described above.

[0097] According to the third embodiment, since the entire axial area of ​​the blade 5a of the cooling fan 5 substantially overlaps the coil end groups 45f and 45r in the radial direction, the cooling fan 5 can reliably supply cooling air to the coil end groups 45f and 45r. , thereby improving the cooling performance of the coil end groups 45f and 45r. Furthermore, since the discharge side of the cooling fan 5 is shielded by the coil end groups 45f and 45r, an effect of shielding the diffusion of noise can be produced, thereby reducing wind noise.

[0098] In addition, in the above-mentioned embodiments, the cases where the number of slots per pole and phase are 1 and 2 have been d...

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PUM

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Abstract

In a stator core, the radial length (ht) and the width (bt) of a rack part meets that the ratio of bt and ht is less than 0.4 and more than 0.15. A stator winding is provided with a plurality of windings which are respectively winded on a trough group consisting of the troughs of the stator core with specific trough numbers. Each winding is formed by winding the conductive wires on the trough group by equal parts at the left side and the right side, wherein, the conductive wires extend out of the two ends of the trough and respectively inserted into the troughs with the distance of specific trough number and at two sides of the circumferential direction by equal parts at the left side and the right side of the circumference. Furthermore, the trough receiving parts of the conductive wires are received in the troughs by multi-layer in a state that the long axis direction with flat sections and the circumferential direction are consistent in the radial direction and arranged as a line.

Description

technical field [0001] The present invention relates to a vehicle alternator, in particular to a vehicle alternator which improves the cooling performance of the stator by allowing cooling air to pass through the cooling air ventilation path formed by the coil end groups of the stator winding and the rack portion of the stator core. dynamo. Background technique [0002] Figure 16 is a sectional view showing a conventional vehicle alternator, Figure 17 It is a perspective view showing a stator used in a conventional vehicle alternator, Figure 18 It is a schematic diagram explaining the manufacturing method of the conventional stator core, Figure 19 It is a plan view showing a conventional stator core. [0003] Figure 16 and Figure 17 Among them, the conventional alternator for vehicles includes: a housing 3 composed of an aluminum front bracket 1 and a rear bracket 2; a shaft 6 which is arranged in the housing 3 and has a pulley 4 fixed at one end; Lander type roto...

Claims

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Application Information

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IPC IPC(8): H02K1/20H02K3/24H02K9/06
Inventor 柏原利昭
Owner MITSUBISHI ELECTRIC CORP
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