JPH0732554B2 - Vehicle AC generator stator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stator of an alternator for a vehicle, and more particularly to a configuration of a neutral point derivation terminal in an armature coil of a three-phase alternator.

[Conventional technology]

First, in FIG. 6 showing an electric circuit of a conventionally proposed AC generator of this type, (1) is a three-phase AC generator,
(101a) (101b) (101c) are armature coils for each phase, (10
1n) is the neutral connection of each phase, (A) (B) (C) (N)
Is a derivation terminal of each phase, (102) is a field coil, and (2) is a full-wave rectifier that rectifies the AC output of the generator (1). The first rectifying element (201) and the second rectifying element (202) and the third rectifying element (203). (3) is the field coil (10
A voltage regulator for intermittently controlling the field current flowing in 2) to control the output voltage of the generator (1) to a predetermined voltage, (4) a storage battery installed on the vehicle, (5) an electric load, (6) is an operation switch of an electric load, (7) is a key switch (8)
Is a charging indicator light.

7 to 9 show a conventional AC generator of this type. In each drawing, (9) is a rotary shaft driven by an unillustrated engine, and (10) is fixed to this rotary shaft. In the field core, the field coil (102) is wound around the field core. Reference numeral (11) is a cylindrical mold member fitted to the rotary shaft (9), and a pair of slip rings (12) are provided on the outer periphery thereof.
Is buried and held. The respective slip rings (12) are connected to both ends of the field coil (102). (1
3) is an annular armature core facing the field core (10) in the radial direction with a small annular gap, and has a plurality of slots (13a) formed over the entire circumference. Each armature coil (101a) (101b) (1
01c) is wound. (14) is a bearing for the rotating shaft (9), and (15) is a bracket that rotatably supports the rotating shaft (9) via the bearing (14), and fixedly supports the armature core (13). There is. Reference numeral (16) is a brush holder, which is integrally formed with the voltage regulator (3) and is a bracket (1
Installed in 5). (17) is a plus-side cooling fin of the full-wave rectifier (2), (18) is a minus-side cooling fin, and is provided to face the plus-side cooling fin (17) in the radial direction. Positive side terminal plates and negative side terminal plates of the first and second rectifying elements (201) (202) of each phase are fixed to each rectifier cooling fin (17) (18) by soldering. The first and second rectifying elements (201) (202)
Are arranged so as to face each other between the rectifier cooling fins (17) (18), and the cooling fins (17) (18) of the rectifying elements (201) (202) are arranged.
The terminal lead (201a) of the terminal plate fixed to the terminal and the terminal lead (202a) on the opposite side are all drawn out in the same direction, and the terminal lead portions of the first and second rectifying elements (201) (202) of each phase The lead terminals (A), (B), (C) and (N) of the armature coils (101a) (101b) (101c) are respectively soldered to the first rectifying element (201) and the second rectifying element (201). The rectifying element (202) and the coil of the corresponding phase of the armature coil (101
a) (101b) (101c) are connected at the same time.

The third rectifying element (203) is also used for each rectifier cooling fin (1
7) Lead terminals (A) and (B) for each phase provided between (18)
Although it is connected to (C), it is not directly related to the present invention, and a detailed description thereof will be omitted. Also, positive cooling fins (17)
The negative cooling fin (18) is insulated via an insulator (19) as shown in FIG. The full-wave rectifier (2) configured as described above has the screw (21) through the insulator (20).
The output terminal bolt (22) is fastened to the bracket (15) by the nut (23) with an insulator interposed between the output terminal bolt (22) and the output terminal bolt (22).

Next, the stator or armature of the conventional vehicle alternator shown in FIGS. 10 to 17 will be described.

In FIGS. 10 to 17, (30) is a coil, and (31) is an annular shape of this coil (30), which has a required number of turns of one phase (for example, 6).
(32) is a coil unit wound only for one turn), and (32) is a coil unit (31) formed by a molding machine (not shown) that is formed into an annular shape having uneven portions in the radial direction. It constitutes one phase, and six coil members (32) are used for three phases. (32A) is a lead-out end of the coil member, and (32N) is a neutral-point-side lead-out end. (33) is a stator obtained by inserting the coil member (32) into the slot (13a) of the armature core (13),
(34) is a coil end, (35) is a wedge to be inserted into the slot (13a), and (36) is a part to which three of the neutral point side lead-out ends (32N) of the respective phases are connected are protected. A protection tube (37) is a derivation unit which is derived from each of these protection tubes (36) and constitutes a neutral point derivation terminal (N).

When manufacturing an armature for a conventional vehicle alternator configured in this way, first, a coil unit (31) is formed by winding the coil (30) in an annular shape by the required number of turns for one phase, This unit (31) is molded with a molding machine (not shown) to form a coil member (32) having an annular shape and an uneven portion in the radial direction. As shown in FIG. 13, two coil members (32) are paired to form a coil member (32).
The right side coil member (32) is inverted and placed on the left side coil member (32), and the concave portion and the convex portion face each other as shown in FIG. The armature core (13) slot (13
Insert in a). This inserted state is shown in FIG. That is,
As shown in FIG. 17, the coil member (32),
And as a pair, in the order of →→→→→
Insert into 36 slots (13a). After this, the three neutral point side lead-out ends (32N) of each coil member are joined to the lead-out end (32N) of the coil member and fixed to each other by soldering or the like, and one lead-out end from this joint portion. The part (37) passes through the coil end (34) so as to be located between the lead terminals (B) and (C) of each phase, while the three neutral point side lead ends (32N) of each coil member ) Is led out to the lead-out end (32N) of the coil member and is joined, and is fixed to each other by soldering or the like at the joined portion. From this joined portion, one lead-out portion (37) passes through the coil end (34). Is derived so as to be located between the lead terminals (B) and (C) of each phase,
The neutral point derivation terminal (N) by these two derivation parts (37)
Make up.

[Problems to be solved by the invention]

In the stator of the conventional vehicle alternator configured as above, the armature coils (101a) (101b) (101c) of each phase
The lead-out end (32N) of the neutral point side is the armature core,
They are separated from each other in the circumferential direction of 3) (100 ° in terms of the actual circumferential direction), and therefore, each of the neutral point side lead-out ends (32N) of each phase, 3 each are manually Must be screwed together and joined together at two places by soldering or the like, and the joints at these two places must be covered with an insulating tube (36). It is necessary to provide each lead-out portion (37) in order to further form one neutral point side lead-out terminal (N) from the joint portion in 36), and furthermore, each lead-out portion (37) is in the vicinity of its protruding portion. In order to form the lead-out terminal (N), it is necessary to pass through the coil end (34) and hold the position of each coil. Was there. Moreover, it is necessary to extend the neutral point side lead-out end (32N) of each phase armature coil (101a) (101b) (101c) in the circumferential direction.
Since it is configured to derive 7), each derivation unit (37)
However, since the number of the lead wires is large, they have poor vibration resistance and have a drawback that the insulation strength of each coil is lowered.

The present invention has been made in order to solve the above-mentioned problems, and is capable of improving workability because automatic assembly is facilitated and also improving insulation of lead wires of armature coils of respective phases. The purpose is to obtain the stator of the alternator.

[Means for solving problems]

The stator of the vehicular AC generator according to the present invention includes two annular coil members each having an uneven portion in the circumferential direction and having the same phase.
One of them is wound, and the neutral point lead-out terminal side of either one of the same-phase coil members is wound by a predetermined angle and led out, and the two same-phase coil members are superposed so that their concave portions and convex portions face each other. The armature coils of the same phase are formed by inserting them into the slots, respectively, and the output side lead terminals and the neutral point lead terminals of the same phase armature coils are provided close to each other.

[Action]

The stator of the vehicle alternator according to the present invention can be provided close to each other between the output-side lead-out terminals of the same-phase armature coil and between the neutral-point lead-out terminals. Since the lead-out terminals are easily provided close to each other, the lead-out distance at the neutral point lead-out end of each phase can be shortened.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. First
In FIG. 3 to FIG. 3, (32N ′) is one neutral point side derivation end of each coil member (32) that constitutes the armature coil (101a) (101b) (101c) of each phase, and the angle is different from the conventional one. Then, it is led out by being wound 60 ° extra. Reference numeral (25) is a focusing metal fitting for focusing and connecting and fixing the neutral point side derivation ends (32N) (32N ') of each of the six phases. This fitting is a lead-out terminal (B) of the armature coil (101b). And the lead-out terminal (C) of the armature coil (101c), the six neutral point side lead-out ends (32N) (32N ') are collectively focused and welded,
The lead-out ends (32N) (32N ') are integrally fixed by soldering or the like, and the two lead-out ends (32N) are projected from the focusing metal fitting (25) so that the neutral point lead-out terminal (N) Are configured.

In the embodiment constructed in this way, one of the coil members (32) forming the armature coils (101a) (101b) (101c) of each phase has one lead end (32N) on the neutral point side. ′) Is set to 1/6 turn angle as shown in FIGS.
By winding as much as possible, it can be inserted into the same slot (13a) as the neutral point side derivation end (32N) of the other pair of coil members (32). The neutral point side lead-out ends (32N) (32N ') can be mounted within an angle of 40 ° on the inner peripheral surface of the armature core (13).

Therefore, the neutral point side derivation end (32N) (3
2N ') is led out to an intermediate position between the lead-out terminals (B) and (C), is focused by the focusing metal fittings (25), is caulked, and is then soldered or the like to each lead-out end (32N). (32N ')
And the focusing metal fitting (25) are completely fixed together. Further, two neutral point side lead-out ends (32N) are projected from the focusing metal fitting (25), and these two lead-out ends (32N) form a neutral point lead-out terminal (N).

That is, in the embodiment of the present invention, the neutral point side derivation end (32N) (3) of each armature coil (101a) (101b) (101c)
2N ') can be attached to each slot (13a) of the armature core (13) close to each other, so that 3 pairs, that is, 6 neutral point side lead-out ends (32N) (32N') are directly connected to one place. Since it can be focussed and connected, compared to the conventional method of connecting to two or three places, only one place is required for soldering, and there is no need to screw the lead-out end by hand to connect it to the neutral point side. The work of putting the end under the coil end is not required, and the wiring of the coil lead-out part is easy and can be automated, and the six lead-out ends (32N) (32N ') can also be joined by caulking with the brace (25). It is easy to perform, and it is not necessary to wrap an insulating tube around each joint as in the conventional case, and the lead-out distance of the coil lead-out portion can be shortened, so that the insulation resistance and vibration resistance are improved.

Further, in this embodiment, the required angular width in the circumferential direction of the lead-out terminals (A) (B) (C) (N) of the armature coil is set to 30.
Since it can be reduced by about °, each lead terminal (A) (B) (C)
The stripping device for the insulating film of the coil constituting the above can be downsized, and the stripping work can be facilitated.

In the above description, the neutral point lead-out terminal (N) is configured by projecting two neutral point side lead-out ends (32N) through the focusing metal fitting (25), but it is shown in FIG. As described above, the six neutral point side derivation ends (32N) (32N ') are caulked and fixed by the three focusing metal fittings (25), so that these derivation ends (32N) (32N') and each derivation end ( The lead-out terminal (N) may be composed of a focusing metal fitting (25) in which 32N) (32N ') are focused and fixed.

Further, in the above description, as shown by the solid line in FIG. 2, the neutral point side lead-out end (32) of the coil member forming the armature coil (101c) is shown.
N ') is wound more by 60 °, but
As shown by the broken line in FIG. 2, if the neutral point side lead-out end (32N ') of the coil member is wound more by 60 degrees,
Armature core (13) at the lead-out end (32N) (32N ') of each coil
The mounting angle in the circumferential direction at is 50 °, and the lead-out ends can be further brought close to each other.

〔The invention's effect〕

As described above, according to the present invention, two coil members each having the same phase and having annular irregularities formed in the circumferential direction are provided, and the neutral point lead-out terminal side of any one of the same phase coil members is predetermined. The same-phase armature coil is formed by winding the coils at a large angle and deriving the same-phase coil members so that the recesses and the protrusions face each other and inserting the coil members into slots. Since the output side lead-out terminal of the child coil and the neutral point lead-out terminal are arranged close to each other, the lead-out distance of the neutral point lead-out end in each phase can be easily shortened, improving insulation resistance and vibration resistance. In addition, since it is possible to eliminate the conventional work of twisting and coupling the neutral point lead-out portions of each phase by hand, automatic assembly is facilitated and workability is improved.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a stator according to an embodiment of the present invention, FIG. 2 is a schematic configuration view showing a main part of the embodiment of the present invention shown in FIG. 1, and FIG. FIG. 1 is a block diagram showing a manufacturing process of an embodiment of the present invention shown in FIG. 1, FIG. 5 is a front view showing a main part of a stator according to another embodiment of the present invention, and FIG. FIG. 7 is an electric circuit diagram showing the device, FIG. 7 is a sectional view showing the conventional device, FIG. 8 is a side view showing the conventional device, FIG. 9 is a sectional view taken along line XI-XI of FIG. 8, and FIGS. FIG. 16 is a configuration diagram showing a manufacturing process of a conventional device, FIG. 16 is a front view showing a main part of a stator of the conventional device, and FIG. 17 is a schematic configuration diagram showing a main part of the conventional device. In the figure, (1) is an AC generator, (101a) (101b) (101c)
Is the armature coil, (101n) is the neutral connection of each phase,
(A) (B) (C) is each lead-out terminal of the three-phase armature coil,
(N) is a neutral point derivation terminal of the three-phase armature coil, (102)
Is a field coil, (2) is a full-wave rectifier, (3) is a voltage regulator, (4) is a storage battery, (10) is a field core, (13) is an armature core, (13a) is a slot, ( 25) (26) is a brace, (30) is a coil, (31) is a coil unit, (32)
Is a coil member, (32A) (32B) (32C) is a lead-out end of each coil member, (32N) (32N ') is a neutral-point-side lead-out end of each coil member, (33) is a stator, (34) Is the coil end, (3
5) is a wedge, (36) is a protection tube, and (37) is a derivation part. In each drawing, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sousuke Yoshino 840 Chiyoda-cho, Himeji City, Hyogo Prefecture Mitsubishi Electric Corporation Himeji Works (56) Reference JP 62-18952 (JP, A)

Claims (1)

[Claims] 1. An armature core having a plurality of slots formed over the entire circumference thereof, and a three-phase armature coil wound around each slot of the core. A coil member in which an output side lead-out terminal of an armature coil and a neutral point lead-out terminal of each phase are projected in close proximity to each other so as to connect to a rectifier, and a ring-shaped coil member having a concavo-convex portion formed in a circumferential direction. Are provided in the same phase, and the neutral point lead-out terminal side of either one of the same-phase coil members is wound around by a predetermined angle and led out, and the two same-phase coil members are formed into a concave portion and a convex portion. And the output side lead-out terminals and the neutral point lead-out terminals of the armature coils of the same phase are provided close to each other by stacking them so that AC generator for vehicles characterized by Stator.