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On-vehicle AC generator

A technology for alternators and vehicles, applied to synchronous generators, electrical components, electromechanical devices, etc., which can solve problems such as deterioration of electromagnetic sound, deformation, and poor voltage resistance

Inactive Publication Date: 2006-11-22
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0036] As mentioned above, in the stator of the conventional vehicle alternator, the rigidity corresponding to the supporting structure of the stator (also referred to as the frame) cannot be ensured. The rigidity of the end face) is low, and when it is pressed into the frame axially during assembly (that is, fitting with the frame), it may be deformed, or the laminated steel plates may be peeled off or stacked misplaced, resulting in poor pressure resistance and corrosion. question
There will also be a problem of deterioration of electromagnetic sound due to deformation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] figure 1 It is a sectional view showing the structure of the vehicle alternator in Embodiment 1 of the present invention.

[0057] figure 2 It is a perspective view before coating the stator of the vehicle alternator of Example 1 with an insulating resin.

[0058] in addition, image 3 It is a conceptual perspective view showing a state in which an insulating resin is applied between the coil end base and the core end of the stator of the automotive alternator according to the first embodiment.

[0059] First, refer to figure 1 The overall structure of the vehicle alternator of this embodiment will be described.

[0060] The vehicle alternator of this embodiment includes: a housing 3 made of aluminum front frame 1 and rear frame 2; a shaft (or a rotating shaft) which is arranged in the housing 3 and has a pulley 4 fixed at one end 6; the rotor 7 fixed on the shaft 6; the cooling fan 5 fixed at both axial ends of the rotor 7; the stator 8 fixed on the housing 3 ar...

Embodiment 2

[0096] Figure 5 It is a plan view of a state in which a wire bundle group (or coil) 30 constituting a stator winding used in the vehicle alternator of the second embodiment is mounted on a stator core.

[0097] Such as Figure 5 As shown, the coil 30 of this embodiment is a planar coil formed by folding a continuous bundle of wires in the same manner at a slit pitch, and three patterns are superimposed to form a linear or rectangular parallelepiped core shape.

[0098] On one side perpendicular to the lamination direction of the linear or rectangular parallelepiped laminated iron core 31, the coil 30 is inserted into the slot 32 opened at a predetermined pitch, bent so that the opening of the slot faces the center of the cylinder to form a circular tube, and then The ends of the iron cores are welded to each other to form the stator 8 .

[0099] In addition, the above-mentioned manufacturing method of the stator 8 is described in detail in paragraphs 0032 to 0033 of Patent ...

Embodiment 3

[0110] Figure 7 It is a perspective view for explaining the structure of the stator used in the vehicle alternator of the third embodiment.

[0111] In the above-mentioned embodiment 2, the stator coil inserted into the stator core is a continuous wire, but it can also be applied to inserting the two ends of a plurality of short coil pieces 40 into two slots 41 separated by a predetermined distance, and respectively inserting the coil One end is connected to one end of another predetermined coil to form a continuous winding structure in the state of being installed on the iron core.

[0112] The resin filling operation process and the appearance of the core end are the same as those of the foregoing embodiments.

[0113] On the cylindrical core 42, the same multi-slot stator as in the second embodiment can be realized.

[0114] That is, the stator can be fabricated by inserting the coils into the slots of the rectangular parallelepiped stator core without forming them into ...

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Abstract

An alternator for a vehicle, comprising a rotor (7) and a stator (8), the stator (8) comprising: a plurality of slots (15c) arranged in the circumferential direction and extending along the direction of the central axis of the shaft (6) ), and the cylindrical stator core (15) that is fitted and supported by the casing (3) in the shape of the inner rotor (7); and the stator winding (16) wound in the slot (15c) of the stator core (15) ), the stator winding (16) has coil ends (16a, 16b) extending from both ends of the stator core (15) in the central axis direction, and an adhesive insulating resin (25) is coated on the coil ends ( 16a, 16b) and the corner formed by the base outer peripheral surface of the coil end (16a, 16b) and the end surface of the stator core in the direction of the central axis are also filled with an adhesive insulating resin. According to the present invention, the stator will not be deformed by the force received when fitting with the housing, and has high rigidity.

Description

technical field [0001] The present invention relates to, for example, a vehicle alternator driven by an internal combustion engine, and particularly relates to a stator structure of a vehicle alternator mounted on vehicles such as cars and trucks. Background technique [0002] Generally speaking, the stator of a conventional vehicle alternator has a core structure in which steel plates with a thickness of about 0.5 mm are overlapped to form a core with a predetermined lamination length (that is, a predetermined thickness in the lamination direction). The rotating shaft of the rotor arranged on the peripheral side is opened with a large number of slots, and various windings corresponding to the specifications of the generator are accommodated in the slots. [0003] For example, as in Patent Document 1 image 3 As shown, the shape of the stator core (also referred to simply as the core) is cylindrical, and on the inner surface side of the stator core, slots opening toward the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/34H02K1/18H02K1/16H02K3/38H02K3/50H02K19/22
CPCH02K1/16H02K3/38H02K3/50
Inventor 柏原利昭浅尾淑人大桥笃志冈本省吾
Owner MITSUBISHI ELECTRIC CORP