JPH0732555B2 - 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 fixed to the bracket (15) by the nut (23) via the insulator (24).

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. 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. 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 joined, and is fixed to each other by soldering at the joined portion. From this joined portion, one lead-out portion (37) passes through the coil end (34). It is led out so as to be located between the lead-out terminals (B) and (C) of each phase, and these two lead-out portions (37) form a neutral point lead-out terminal (N).

[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) on the neutral point side of the armature core (1
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 by soldering at two places, and the joints at these two places must each be covered with an insulating tube (36), and the insulating tube (36) must be covered. 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 (). Moreover, each lead-out portion (37) is located near its protrusion. Since it has to pass through the coil end (34) and hold its position, the lead terminal (N) is formed, and as described above, the amount of manual work is increased and automatic assembly cannot be performed, resulting in extremely poor workability. Was there. Moreover, the armature coils (101a) (101b) (101c) of each phase are connected to the neutral point side (32N).
Need to be extended in the circumferential direction and each lead-out portion (37) is led out, so that each lead-out portion (3
Since the number of lead wires in 7) is large, they have poor vibration resistance and have the drawback of reducing the insulation strength of each coil.

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 the same-phase coil members is wound around the neutral point lead-out terminal side 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. And the armature coils of the same phase are formed by inserting the armature coils into the slots, and the neutral point side derivation ends of the armature coils of the respective phases are respectively connected between the output side derivation terminals of the three-phase armature coils. The lead-out terminals connected directly to each other at one time and connected to the rectifier are projected from this joint.

[Action]

Since the stator of the vehicular AC generator according to the present invention is configured such that the neutral point side derivation ends of the armature coils of the respective phases are coupled to each other between the derivation terminals of the three-phase armature coils, There is only one part, and the lead-out distance of the lead-out end on the neutral point side of each phase reaching the joint 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 lead-out end of each coil member (32) constituting the armature coil (101a) (101b) (101c) of each phase, which is different from the conventional one. 1/6 turn, that is, an angle of 60 ° and is wound with extra winding. (25) is the neutral end of the six phases (32N) (32N)
N ') are connected together to form a projecting portion (25a) which becomes the neutral point lead-out terminal (N), which is the lead-out terminal (B) of the armature coil (101b). It is mounted so as to project between the lead-out terminal (C) of the armature coil (101c).

The above-mentioned connecting fittings (25) are each 6 neutral point side lead-out ends (32N)
(32N ') are joined together and are fixed integrally with each lead-out end (32N) (32N') by welding, soldering or the like.

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. 2), 3) and 4), each of which has a 1/6 turn angle and is wound more by 60 °, so that the neutral point of the other coil member (32) forming a pair is neutralized. It can be inserted in the same slot (13a) as the side lead-out end (32N), and the neutral point side lead-out ends (32N) (32N ') of each of these three pairs of phases are inside the armature core (13). It can be installed within an angle of 40 ° on the peripheral surface.

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), bundled by the connection fittings (25) which are crimp terminals, crimped, and then led out by soldering or the like. The ends (32N) (32N ') and the connecting fitting (25) are completely fixed together. In addition, the projection (25
a) Since it is formed, the protruding portion (25a) constitutes the 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 connected, compared to the conventional two or three places, there is only one soldering point, and there is no need to twist the lead-out end by hand, and the lead-out end on the neutral point side There is no need to squeeze the coil end, and it is not necessary to wind 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 the case of this embodiment, the necessary angular width in the circumferential direction of the lead-out terminals (A), (B), (C), (N) of the armature coil can be reduced by about 30 °, so that the lead-out terminal insulating film is peeled off. The device can be downsized and the peeling work becomes easy.

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).
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.

Further, in the above description, the armature coils (101a) (101b) of each phase
An example of parallel winding in which two derived ends of (101c) are provided is shown, but it is also applicable to a series winding, and this is shown in FIG. In FIG. 5, lead-out ends (32A) (32B) of armature coils (101a) (101b) (101c) of each phase
(32C) is one each, and the neutral point side derived end (32N)
Is a total of three, one for each of the armature coils (101a) (101b) (101c), and these three neutral point side derivation ends (32N) are for each coil (101b) (101c) Derivation terminal (B)
Projections (25a) integrally formed on the connection fittings (25) integrally joined to each other between (C), caulked integrally with the connection fittings (25), integrally fixed to each other by soldering or the like.
Is configured as a derivation end (N).

Further, in the above description, each slot (13a) of the armature core (13)
In the above, the type in which the armature coils (101a) (101b) (101c) are inserted in two different directions has been illustrated, but the present invention is not limited to this.

〔The invention's effect〕

As described above, according to the present invention, two coil members each having an annular shape and having a concavo-convex portion formed in the circumferential direction are provided in the same phase, and the neutral point lead terminal side of any one of the same phase coil members is provided. The two coils of the same phase are wound out by a predetermined number of turns, and the two coil members of the same phase are overlapped with each other so that the concave portions and the convex portions face each other and inserted into the slots, respectively, to form an armature coil of the same phase. The neutral point side derivation end of each phase armature coil is directly and collectively coupled between the output side derivation terminals of the three-phase armature coils, and the derivation terminal connected to the rectifier from this coupling part. Since the three-phase armature coil has only one connecting portion at the neutral point side lead-out end because it is configured to project, the handleability at the neutral point side lead-out end is improved, and furthermore, the connecting point is reached. Derivation distance of the neutral point side derivation end of each armature coil Since the assembly time can be shortened, the automatic assembly becomes easier and the workability is improved. Moreover, the insulation resistance and vibration resistance of the neutral point side lead-out end of each armature coil are improved, and the mechanical strength is increased. There is an effect that it can be used as a sex point deriving terminal.

[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 a sectional view showing a conventional device, FIG. 7 is a side view showing the conventional device, and FIG.
FIG. 10 is a cross-sectional view taken along line IX-IX of FIG. 10, FIGS. 10 to 15 are configuration diagrams 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 conventional device. It is a schematic block diagram which shows the principal part. 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) is the connecting bracket, (25
a) protrusion, (30) coil, (31) coil unit, (32) coil member, (32A) (32B) (32C) lead-out end of each coil member, (32N) (32N ') Is a neutral end of each coil member, (33) is a stator, (34) is a coil end, (35) is a wedge, (36) is a protective tube, (3)
7) is a derivation part. In each figure, 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-A-63-294242 (JP, A) JP-A-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. Are overlapped with each other so as to face each other and are inserted into the respective slots to form armature coils of the same phase, and the neutral point side derivation ends of the armature coils of the respective phases are output sides of the three phase armature coils. Each of the lead-out terminals directly Bound stator of the automotive alternator, characterized in that projecting the derived terminal connected to the rectifier from the coupling portion.