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AC generator for vehicle

A technology for alternators and vehicles, applied to the shape/style/structure of synchronous generators, winding conductors, etc., can solve the problems of deterioration of heat dissipation and reduction of area of ​​coil end groups, and achieves reduction in unevenness, increase in area, The effect of improving insulation performance

Active Publication Date: 2011-02-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to pressure fluctuations between the coil end group and the rotor 7, a large 12th air friction sound is generated.
[0027] In addition, since the wire harness of the extension part 30a is thick, the area of ​​the coil end group receiving the cooling air is reduced, and the heat dissipation of the coil end group is deteriorated.

Method used

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

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Embodiment Construction

[0050] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0051] figure 1 Shown is a perspective view of a rotor of a vehicle alternator related to the present invention, figure 2 It is an explanatory drawing showing the stator core of the stator of the vehicle alternator related to the present invention flattened, image 3 Shown is a perspective view of a stator of a vehicle alternator related to the present invention, Figure 4 Shown is a side view of main parts of the stator of the vehicle alternator related to the present invention, Figure 5 It is a partial cross-sectional view showing the slot placement state of the stator winding of the stator of the alternator for vehicles related to the present invention, Image 6 It is a perspective view showing a stator winding portion of a phase portion of a stator of an alternator for a vehicle according to the present invention, Figure 7 It is an enlarged view of main part...

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Abstract

The invention discloses alternating-current generator used for vehicles. Grooves are formed on the stator core in a ratio of 2 per pole per phase. The stator winding is formed by a first three-phase stator winding and a second three-phase stator winding, which are wound around the stator core at an electrical angle of 31 DEG to 34 DEG. The stator winding parts of the first three-phase stator winding and the second three-phase stator winding are formed by the distribution windings. The conducting wires for forming the stator winding are provided with a slot accommodating part which is placed in a slot and shaped with a flat cross section and a connection part connected between the end parts of the adjacent slot accommodating parts and shaped with a round cross section substantially. The slot accommodating parts are arranged in a row in the radial direction and placed inside the slot in a laminated manner.

Description

technical field [0001] The present invention relates to a vehicle alternator that generates an AC voltage in a stator by utilizing rotation of a rotor. Background technique [0002] In recent years, in vehicle alternators, since the engine room of the vehicle has become smaller and smaller, there is no extra space for installation. On the other hand, due to the increase in vehicle load, it is required to increase the power generation output. [0003] In addition, there is a high demand for noise reduction both inside and outside the vehicle, and the noise of the engine is being reduced. However, the noise of the vehicle alternator, which is often in power generation operation for supplying electric loads to the vehicle, has become a problem. In a vehicle alternator that is rotationally driven in a relatively wide rotational speed range from a low speed to a high speed, its wind noise and electromagnetic noise become problems. Especially from the idling state with low engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K19/26H02K3/28H02K3/12
Inventor 柏原利昭
Owner MITSUBISHI ELECTRIC CORP