JPH06225491A - Apparatus for connecting a guiding lead of stator of rotary electric device - Google Patents

Abstract

PURPOSE:To improve efficiency of wiring work by providing positioning projections for determining fitting positions of coil and insulating terminal plate to a lower part of insulating terminal plate at the upper surface of coil. CONSTITUTION:When a positioning projection 11 is inserted between coils of different phases at the internal side, insulation between internal coils of different phases is maintained. A projection width of the positioning projection 11 is process to have no any play depending on a gap distance between coils of different phases at the internal side to engage the positioning projection 11 in the shape of a wedge between the coils of different phases at the internal side. Thereby, an insulating terminal plate 9 itself can be positioned and fixed. Moreover, the insulating terminal plate 9 can easily be mounted at the target position with a guidance of the positioning projection 11 when it is set on the upper surface of the coil 2. Thereby, working efficiency for wiring can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire connecting device for a rotating electric machine stator.

[0002]

2. Description of the Related Art A conventional method for connecting a lead wire of a rotary electric machine stator is shown in FIGS. FIG. 8 shows a winding method of a coil of a three-phase induction motor stator having 36 slots and four poles, and FIG. 9 shows the above three-phase induction motor stator coil with 2?
It shows an example of connection in the case of connection by the Y method.
FIG. 10 shows another example of wiring when the 4-pole three-phase induction motor stator coils are connected by the Y method. FIG. 11 shows
The layout of the stator windings is shown, for example, as shown in FIG.
The coil of each phase of the step winding has an outer ill 2A formed at a pitch of 120 °, and is 120 ° out of alignment with the outer coil 2A.
The inner coil 2B is formed at a pitch of °. FIG. 12 shows a typical appearance of the stator winding formed as described above.

Conventionally, the end of the lead wire extending from the coil wound as shown in FIG. 8 is provided with an insulating tube as shown in FIG. 12 according to the purpose such as the lead wire and the neutral point. Had been inserted. After that, a plurality of lead wires are appropriately connected, for example, as shown in FIG. In FIG. 12, for example, one lead wire 6 is routed around the upper surface of the coil 2 to the lead wire 4, and another neutral point wire 7 is to the neutral point connecting portion 21A or 21B. Are routed around the upper surface of each and electrically connected at their ends. After that, the neutral point insulating tube 8 is inserted at the neutral point connection portion 21A or 21B, and the three lead wires 4 for three phases are put together and the lead wire collecting tube 4A is inserted. 5, the wiring and the connecting portion were bound and fixed on the upper surface of the coil 2.

Among adjacent coils requiring insulation between different phases (hereinafter referred to as "different phase coils") as shown in FIG. 11, the inside different phase coils 10 are different from the outside different phase coils 12, and When finishing the coil ends, it was easy for troubles that different-phase coils approached and contacted. In order to prevent this contact trouble, the correlation insulating paper 14 was manually inserted in advance between the inner phase coils.

[0005]

However, in this type of lead wire connection method, as shown in the conventional example, many insulating tubes are inserted into many lead wires on the upper surface of the coil,
There are drawbacks such as the skill of the operator and a large amount of labor required for processing the wiring and inserting the correlation insulating paper between the different phase coils of the inner coil.

[0006]

In order to solve the above problems, the present invention installs an insulating end plate 9 on the upper surface of the coil 2 and the inner side of the different phase coil below the insulating end plate 9. There is provided a lead wire connection device characterized in that a positioning protrusion 11 which is inserted into the space 10 and determines a mounting position of the coil 2 and the insulating end plate 9 is installed.

The present invention also relates to an L-shaped shallow groove lead wire guide 22, a T-shaped shallow groove lead wire guide 23, an L-shaped deep groove lead wire guide 24, and a T-shaped deep groove lead wire guide 25.
And an I-shaped deep groove-shaped lead wire guide 29, and an insulating end plate 9 having a gate-shaped lead wire hook 26 formed therein. These lead wire guides are located in the vicinity of the rising lead wire 3 drawn out from the coil 2 and are configured so that the direction in which the lead wire is drawn can be easily determined on the upper surface of the insulating end plate 9. Further, the gate-type lead wire hook is configured so as to prevent the lead wire drawn around on the upper surface of the insulating end plate 9 from rising and being prevented from coming into contact with the coils of different phases.

[0008]

In the present invention, the positioning projection 11 provided on the lower portion of the insulating end plate 9 insulates the coils 10 between the coils of different phases, and positions and fixes the insulating end plate 9 itself. The insulating end plate 9 ensures electrical insulation between the lead wires and between the different phase coil and the lead wire. Further, an L-shaped shallow groove lead wire guide 22, a T-shaped shallow groove lead wire guide 23, and an L-shaped deep groove lead wire guide 2 formed on the insulating plate 9.
4. The workability of wiring is facilitated by the T-shaped deep groove lead wire guide 25, the I-shaped deep groove lead wire guide 29, and the gate lead wire hook 26.

[0009]

EXAMPLES Example 1 Examples of the present invention will be described below with reference to FIGS. The description of the same components as those of the conventional example will be omitted. A mark in FIGS. 1, 2, and 11 represents a reference position when comparing and referring to each drawing. FIG. 1 shows an external view when the lead wire connection device of the present invention is applied to a stator of a three-phase induction motor having the connection shown in FIG. Figure 1 shows all wiring
Although wiring and insulation have been completed, racing thread has not yet been hooked. In FIG. 1, reference numeral 9 is an insulating end plate installed on the upper surface of the coil 2, and is made of a resin or the like having excellent electrical insulation, heat resistance, and mechanical strength. Positioning protrusions 11 to be inserted between adjacent inner-phase coils 10 are formed on the lower portion of the insulating end plate, and L-shaped shallow groove lead wire guides 2 for wiring and fixing lead wires are formed on the upper portion thereof.
2, T-shaped shallow groove lead wire guide 23, L-shaped deep groove lead wire guide 24, T-shaped deep groove lead wire guide 25, I
The V-shaped deep groove lead wire guide 29 and the gate-shaped lead wire hook 26 are formed.

FIG. 2 shows a state in which the insulating end plate 9 is mounted on the upper surface of the coil 2 and each lead wire is wired. The coil 2 wound around the slot groove of the stator core 1 has an outer coil 2A and an inner coil 2B as shown in the coil arrangement of FIG.
The correlation insulating paper 28 for insulating these interphase coils is inserted between them.

In the case of this embodiment, 10 between the coils of different phases inside
Since there are three positions, three positioning protrusions 11 are installed as shown in FIG. When the positioning protrusion 11 is inserted into the inside different-phase coils 10, the insulation between the inside different-phase coils 10 is maintained. In addition, the protrusion width of the positioning protrusion 11 is processed according to the gap amount between the inner different-phase coils 10 so that there is no backlash, and the protrusion 11 is fitted into the inner different-phase coils 10 in a wedge shape to insulate. The end plate 9 itself can be positioned and fixed.
Further, the insulating end plate 9 is easily attached to a desired position by using the positioning protrusion 11 as a guide when being installed on the upper surface of the coil 2.

Next, the wiring work using the lead wire connection device of the present invention will be described. The rising lead wire 3 (U1, V1, W1) protruding from the outer coil 2A toward the outer circumference is provided with an L-shaped shallow groove lead wire guide 22 and a T-shaped shallow groove formed on the outer circumference of the insulating end plate 9. The lead wire rises 3 (U2, V2, W2) protruding from the inner coil 2B in the outer peripheral direction is started up via the lead wire guide 23 and the L-shaped deep groove lead wire guide 24. Also, the inner coil 2
Rise lead wire 3 (u
2, v2, w2) is started up via the L-shaped shallow groove lead wire guide 22 provided on the inner circumference of the insulating end plate 9, and the rising lead wire 3 protruding in the inner circumference direction from the outer coil 2A.
(U1, v1, w1) are started up via the L-shaped deep groove lead wire guide 24, the I-shaped deep groove lead wire guide 29, and the T-shaped deep groove lead wire guide 25, respectively.

By using various lead wire guides in this way, it is possible to easily determine the wiring direction of the lead wire after each lead wire has risen. However, in the case of the T-shaped grooved lead wire guide, bidirectional wiring is possible, and the direction after rising of the lead wire differs depending on the type of connection of the induction motor.

Further, the lead wires rising from various places are insulated on the upper surface of the insulating end plate 9 by using the barrier 13 and the gate type lead wire hook 26 to prevent the lead wires from rising and prevent the lead wires from coming into contact with each other. The lead wire 20 for the lead wire is laid out around the insulating end plate 9 and drawn out in the outer peripheral direction, and at the final position, the gate-shaped lead wire hook 26 is used so that the two lead wires are substantially perpendicular to each other so as not to be lifted. Is stopped.

In FIG. 1, in the present embodiment, six neutral lead wires 21 are grouped into three at two locations, respectively, and then two.
As shown in 1A and 21B, they are electrically connected by brazing or caulking, and the neutral point insulating tube 8 is inserted from above.

Further, a total of three lead wires 4 are made of two lead wires each consisting of six lead wires. After hooking the lead wire 20 for the lead wire, the insulating tube 4B for the lead wire, which is omitted in FIG. 6, is inserted into the two sets of lead wires, and a ring is attached to the tip of the lead wire 20 for the lead wire. The terminal 30 is caulked, and the lead wire collecting tube 4A is inserted into the whole thereof to generate three lead wires 4 of U, V, and W phases. After the wiring and connection work is completed as described above, the insulating end plate is bound and fixed to the coil portion with the running thread 5.

FIG. 3 is an enlarged view of the vicinity of the I-shaped deep groove lead wire guide 29 in FIG. In FIG. 3, for example, it is suggested that the lead wire rising from the I-shaped deep groove lead wire guide 29 extends in the traveling direction of the lead wire guide without bending. Also, for example,
The lead wire rising from the L-shaped deep groove lead wire guide 24 suggests that the lead wire is bent to the left side in the drawing. Further, for example, the lead wire rising from the L-shaped shallow groove lead wire guide 22 suggests that the lead wire is bent to the right side in the drawing. Therefore, it can be easily understood from these examples that good workability can be obtained by using the wire connection device of the present invention. In addition, each lead wire is hooked on the gate-shaped lead wire hook 26 during wiring so that the lead wire does not float.

FIG. 4 is a partial sectional view taken along the line YY of FIG. FIG. 4 shows that the lead wire 3 is laid up on the insulating end plate 9 after standing up via a predetermined lead wire guide, for example, an L-shaped deep groove lead wire guide 24. FIG. 5 is a partial sectional view taken along line XX of FIG. In FIG. 5, the neutral point lead wire 21 is drawn out to the upper surface of the insulating end plate 9 and is connected to each other by the neutral point connecting portion 21B. FIG. 6 is a cross-sectional view of the portal lead wire hook 26 according to one embodiment of the present invention. In the figure,
The lead wire can be prevented from floating by inserting the lead wire into the gate-type lead wire hook 26 and wiring the lead wire.

In this embodiment, the insulating end plate 9 has a disk shape, but its shape is the positioning protrusion 11, the L-shaped shallow groove lead wire guide 22, the T-shaped shallow groove lead wire guide 23,
Any form may be used as long as it includes the L-shaped deep groove lead wire guide 24, the T-shaped deep groove lead wire guide 25, the I-shaped deep groove lead wire guide 29, and the gate lead wire hook 26. Absent. Furthermore, the insulating end plate may be an assembly in which the insulating end plate is divided into a plurality of parts and these are assembled into one insulating end plate.

Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 7 is a wiring top view of an insulating end plate corresponding to FIG. 10 of another embodiment of the present invention. In FIG. 7, as can be seen from the connection of FIG. 10, there are one connection point for the neutral point and three connection points for the inner coil and the outer coil, for a total of four connection points on the insulating end plate 9. It is provided in. Comparing FIG. 7 and FIG. 2, it can be seen that the lead wires rising from the L-shaped and I-shaped groove-shaped lead wire guides have the same wiring direction. However, in the case of the T-shaped grooved lead wire guide, the wiring direction differs depending on the lead wire connection method of the three-phase induction motor stator. For example, in the case of the T-shaped shallow groove lead wire guide on the left side of FIG. 2, the outer V-phase lead wire V1 is wired upward after rising, but in the case of the T-shaped shallow groove lead wire guide on the left side of FIG. It can be understood that the outer V-phase lead wire V1 is wired downward after rising. In this way, the wiring direction after the lead wires rise can be easily determined on the insulating end plate 9 in accordance with the connection method of the three-phase induction motor stator.

[0021]

As described above, according to the present invention, by using the positioning protrusion provided on the lower surface of the insulating end plate,
Insulates the coils of different phases inside that come into contact during coil end molding, and positions and fixes the insulating end plate without making any holes or cutouts in the stator core, which often causes problems in the characteristics of rotating electrical equipment. Is possible. Further, a lead wire guide is provided near the rising lead wire of the coil, and the wiring direction after rising of the lead wire can be easily determined by an L-shaped, T-shaped, or I-shaped grooved lead wire guide, etc. It will be easier. Furthermore, the shallow groove-shaped and deep groove-shaped lead wire guides are separately provided so that the lead wires can be raised from the vicinity of the coil lead wire outlet, so the insulating tube can be significantly reduced and the tube material cost can be reduced. Also, the number of steps for inserting the tube can be reduced.

During wiring work on the upper surface of the insulating end plate, each lead wire can be securely hooked in the circumferential wiring direction by the above-mentioned lead wire guide, and can be hooked only by pushing the above-mentioned lead wire from above. By using, the floating of the lead wire can be prevented and the insulation interval can be secured.

By arranging the gate-type lead wire hook at a position where the lead wire end is finally pulled out from the insulating end plate to the outer peripheral portion, the lead wire can be bent and pulled out at a substantially right angle. Therefore, it is easy to insert the lead wire insulation tube into the lead wire, connect the neutral point connection part to the neutral point lead wire, and insert the neutral point insulation tube. .

After the wiring and connection work, various lead wires can be hooked and stopped, and then racing can be performed for each insulating end plate, so that floating of each lead wire can be further prevented.

As described above, according to the present invention, wiring,
The workability of connection is remarkably improved, and the wired lead wire is also stably held, so that an inexpensive lead wire connection device that is mechanically strong and stable in quality can be obtained.

[Brief description of drawings]

FIG. 1 is an external view of a stator outlet connection device according to an embodiment of the present invention.

FIG. 2 is a wiring top view of an insulating end plate corresponding to the connection of FIG. 9 in one embodiment of the present invention.

3 is an I-shaped deep groove lead wire guide 29 shown in FIG.
It is an enlarged view of the vicinity.

FIG. 4 is a partial cross-sectional view taken along line YY of FIG.

5 is a partial cross-sectional view taken along line XX of FIG.

FIG. 6 is a cross-sectional view of a gate type lead wire hook according to an embodiment of the present invention.

FIG. 7 is a wiring top view of an insulating end plate corresponding to the connection of FIG. 10 according to another embodiment of the present invention.

FIG. 8 is a diagram showing an example of a winding system of a 36-slot, 4-pole, 3-phase induction motor.

FIG. 9 is a diagram showing an example of connection in the case of connecting a three-phase induction motor stator coil in a 2 | Y system.

FIG. 10 is a diagram showing another example of connection when the three-phase induction motor stator coils are connected by the Y method.

FIG. 11 shows a layout of stator windings of a four-pole three-phase induction motor.

FIG. 12 shows an external view of a conventional stator coil connection.

[Explanation of symbols]

 1 Stator core 2 Coil 2A Outer coil 2B Inner coil 3 Rising lead wire 4 Lead wire 4A Lead wire summary tube 4B Lead wire insulation tube 5 Laneing thread 6 Lead wire with insulation tube 7 Insulation tube neutral Point wiring 8 Insulation tube for neutral point 9 Insulating end plate 10 Between coils of different phase inside 11 Positioning protrusion 12 Between coils of different phase outside 13 Barrier 14 Correlation insulation paper between coils inside 20 Lead wire for neutral point 21 Lead for neutral point Wire 21A Neutral point connection part 21B Neutral point connection part 22 L-shaped shallow groove lead wire guide 23 T-shaped shallow groove lead wire guide 24 L-shaped deep groove lead wire guide 25 T-shaped deep groove lead wire Guide 26 Gate type lead wire hook 28 Correlation insulation paper 29 I-shaped deep groove lead wire guide 30 Ring terminal

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[Procedure amendment]

[Submission date] July 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art In FIG .
The position protrusion 11 to be inserted between the adjacent coils requiring insulation is
It is a shared diagram because it is written in. Figure 8
FIG. 9 shows a winding method of coils of a three-phase induction motor stator having 36 slots and four poles, and FIG. 9 shows an example of connection when the above three-phase induction motor stator coils are connected by the 2 | Y system. It is shown. FIG. 10 shows another example of wiring when the 4-pole three-phase induction motor stator coils are connected by the Y method. FIG. 11 is a layout view of the stator windings. For example, the coils of each phase of the three-stage winding shown in FIG. 8 are the outer coil 2A formed at a pitch of 120 ° and the outer coil is displaced by 180 °. The inner coil 2B is formed at a pitch of 120 °. FIG. 12 shows a typical appearance of the stator winding formed as described above.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

Conventionally, the end of the lead wire extending from the coil wound as shown in FIG. 8 is provided with an insulating tube as shown in FIG. 12 according to the purpose such as the lead wire and the neutral point. Had been inserted. After that, a plurality of lead wires are appropriately connected, for example, as shown in FIG. In FIG. 12, for example, one lead wire 6 is routed around the upper surface of the coil 2 to the lead wire 4, and another neutral point wire 7 is to the neutral point connecting portion 21A or 21B. Are routed around the upper surface of each and electrically connected at their ends. After that, the neutral point insulating tube 8 is inserted at the neutral point connecting portion 21A or 21B, and the three lead wires 4 for three phases are put together and the lead wire collecting tube 4A is inserted.
The wiring and the connecting portion were bound and fixed on the upper surface of the coil 2 using the gouging thread 5.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Among adjacent coils requiring insulation between different phases (hereinafter referred to as "different phase coils") as shown in FIG. 11, the inside different phase coils 10 are different from the outside different phase coils 12, and When finishing the coil ends, it was easy for troubles that different-phase coils approached and contacted. In order to prevent this contact trouble, the interphase insulating paper 14 was manually inserted in advance between the inner phase coils.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

However, in this type of lead wire connection method, as shown in the conventional example, many insulating tubes are inserted into many lead wires on the upper surface of the coil,
There are drawbacks such as the need for operator's skill and a lot of work for processing the wiring and inserting the interphase insulating paper between the different phase coils of the inner coil.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

FIG. 2 shows a state in which the insulating end plate 9 is mounted on the upper surface of the coil 2 and each lead wire is wired. The coil 2 wound around the slot groove of the stator core 1 has an outer coil 2A and an inner coil 2B as shown in the coil arrangement of FIG.
Insulate these coils between different phases
Interphase insulating paper 28 is inserted therebetween.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

In FIG. 1, a total of 6 neutrals are provided in this embodiment.
After collecting the lead wires for point 21 at 2 places, 3 for each,
As shown in 21A and 21B, they are electrically connected by brazing or caulking, and the neutral point insulating tube 8
Insert.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

Further, a total of three lead wires 4 are made of two lead wires each consisting of six lead wires. After hooking the lead wire 20 for the lead wire, the insulating tube 4B for the lead wire, which is omitted in FIG. 6, is inserted into the two sets of lead wires, and a ring is attached to the tip of the lead wire 20 for the lead wire. The terminal 30 is caulked, and the lead wire collecting tube 4A is inserted into the whole thereof to generate three lead wires 4 of U, V, and W phases. After the wiring and wiring work is completed as described above, the insulating end plate is bound and fixed to the coil portion with the lacing thread 5.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

By arranging the gate-type lead wire hook at a position where the lead wire end is finally pulled out from the insulating end plate to the outer peripheral portion, the lead wire can be bent and pulled out at a substantially right angle. Therefore, the operation of inserting the lead wire insulation tube for lead wire lead wire, the insertion operation of the connection process and the neutral point for insulation tube of the neutral connection portion is facilitated for a neutral point lead wire.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of symbols] 1 stator core 2 coil 2A outer coil 2B inner coil 3 rising lead wire 4 lead wire 4A lead wire summary tube 4B lead wire insulation tube 5 racing thread 6 lead wire with insulation tube 7 Neutral point wiring with insulating tube 8 Insulation tube for neutral point 9 Insulating end plate 10 Inside coil of different phase 11 Positioning protrusion 12 Outside coil of different phase 13 Barrier 14 Inner coil phase insulation paper 20 Lead wire for lead wire 21 Lead wire for neutral point 21A Neutral point connection portion 21B Neutral point connection portion 22 L-shaped shallow groove lead wire guide 23 T-shaped shallow groove lead wire guide 24 L-shaped deep groove lead wire guide 25 T-shape Type deep groove lead wire guide 26 Gate type lead wire hook 28 Interphase insulating paper 29 I-shaped deep groove lead wire guide 30 Ring terminal

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kozo Hasegawa 5-14 Yanda Minami 5-chome, Higashi-ku, Nagoya City Mitsubishi Electric Corporation Nagoya Works

Claims (2)

[Claims] 1. A stator comprising a laminated steel plate, a plurality of coils housed in a plurality of slots of the stator, and a lead wire for electrically connecting to the plurality of coils. In the rotating electric device stator, the rotating electric device stator is provided on the upper surface of the coil, and is provided with an insulating end plate having a positioning protrusion to be inserted between the adjacent coils requiring interphase insulation. Lead wire connection device. 2. The insulating end plate is located in the vicinity of the end of the lead wire pulled out from the coil, shows the direction in which the lead wire is routed on the upper surface of the insulating end plate, and is further cut so as not to come into contact with the heterophase coil. L-shaped, T-shaped, and I-shaped lead wire guides that secure an insulation distance at a depth, and a gate that guides the lead wires routed on the upper surface of the insulating end plate and prevents the lead wires from rising. The lead wire connection device for a rotating electrical machine stator according to claim 1, further comprising a mold lead wire hook.