JPH08280149A - Connecting jig for stator winding of rotating electric machine - Google Patents

Abstract

PURPOSE: To provide a structure which can reduce the man-hours and time required by the assembly work of a connecting jig for the stator winding of a rotating electric machine which holds conductors connecting stator windings fixed to a stator frame to each other. CONSTITUTION: A connecting jig 6 is assembled by passing a stud bolt 11 through an insulating laminated body 5 holding ring-like conductors 4 put between the clamping grooves 8 of an insulating clamp 7 with a ring seat 14 in between on one side and tightening nuts 13a and 13a at both ends of the bolt 11 and the jig 6 is fixed to a stator frame 12 with another ring seat 14 in between.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection between windings of a stator winding arranged in an iron core slot of a stator core of a rotating electric machine, and more particularly to a connecting conductor for connecting between poles of the stator winding. The present invention relates to the structure of a connection jig for fixing.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show a connecting jig for connecting windings between stator windings. FIG. 5 shows a connecting jig for connecting poles of a stator winding. FIG. 6 is a partial cross-sectional view in the vicinity of an end portion of a stator winding including FIG. 6, and FIG. 6 is a partial perspective view of an insulating laminated body sandwiching a connecting conductor. The stator winding of the rotating electric machine is configured by being inserted into an iron core slot provided on the inner peripheral side of the stator iron core and sequentially winding the winding in the circumferential direction. The number of poles and the number of windings per pole of this stator winding differ depending on the rotation speed and output of the target rotating electrical machine. The connection configuration between these stator windings is
In the case of an electric motor using an enameled wire for the winding, the winding workability is good, and therefore the windings between the iron core slots are directly connected at the coil end. Also, in a rotating electrical machine consisting of a stator winding of the type winding that uses a rectangular conductor for the winding, the poles of the stator winding are conductively connected by a connecting conductor that is insulated in the circumferential direction of the coil end part. The configuration is adopted.

However, in a stator winding of a large-capacity large-sized rotating electric machine, the size of the winding conductors forming the winding is large and the number of windings is large, and these windings are connected to each other. It also takes man-hours and time for connection work with the connection conductor. For this purpose, a number of connecting conductors consisting of insulated ring-shaped conductors are provided between the insulating laminated plates in the axial direction of the rotating electric machine according to the number of phases of the stator windings on the outer circumference of the end portion of the stator winding. A connecting jig is provided in which a plurality of insulating laminated bodies that are sandwiched are arranged in the circumferential direction of the ring-shaped conductor, and the winding in the iron core slot is formed on these ring-shaped conductors. The stator windings are connected by connecting the conductors. FIG. 5 shows a connecting jig 6a composed of an insulating laminated body 5 for sandwiching a connecting conductor composed of a ring-shaped conductor 4 having an insulating layer 4a on its outer periphery for connecting the poles of the stator winding 1. Then, the ring-shaped conductor 4 of the connecting jig 6a and the winding conductor 3 drawn from the end portion 2 side of the stator winding 1 supported by the support ring 2a are brazed with the conductor 1a. The conductive connection is made by connecting the adjacent stator windings 1 with each other. The outer periphery of the connecting portion made of the conductor 1a is wound with an insulating material such as mica tape for insulation. The insulating laminated body 5 that sandwiches the ring-shaped conductor 4 has a U-shaped concave groove 8 on both sides as shown in FIG.
It is composed of an insulating clamp 7 of an epoxy glass laminated plate having, and both side surface portions of the ring-shaped conductor 4 are fitted between the concave grooves 8 of the insulating clamp 7 to provide a predetermined number of ring-shaped conductors 4 in the stacking direction of the insulating clamp 7. It is composed.

This insulating laminated body 5 is arranged at equal intervals in the circumferential direction of the ring-shaped conductor 4 and is provided on the outer periphery of the end portion 2 of the stator winding 1 so that the connecting jig 6a for the stator winding 1 is formed.
Is composed. Each of the ring-shaped conductors 4 sandwiched by the insulating laminated body 5 of the connection jig 6 is a winding conductor 3 drawn from the corresponding end portion 2 of the stator winding 1 via the conductor 1a. Is electrically conductively connected to each other to connect between the poles of each stator winding 1. And this connection jig 6
a is for inserting the stud bolt 11 into the bolt insertion hole 10 provided through the insulating clamp 7 in the stacking direction,
This stud bolt 11 at one end inserted is screwed into the screw hole 12a of the stator frame 12 provided in the iron end plate 9a at the end of the stator core 9, and the other end is bolted with the nut 13. , The insulating clamps 7 of the insulating laminated body 5 are closely laminated and fixed to the stator frame 12 so as to sandwich the ring-shaped conductor 4.

[0005]

An insulating laminated body 5 of an insulating clamp 7 for sandwiching and fixing a ring-shaped conductor 4 which constitutes a connecting conductor for connecting between the poles of the above-mentioned conventional stator winding 1. Since the connecting jig 6a has a structure in which the insulating laminated body 5 is laminated and fixed by screwing and fixing it to the stator frame 12 with the stud bolts 11, the connecting jig 6a is arranged at the end of the stator core 9 and is rotated. If the attachment of the stator frame 12 covering the electric machine body is not completed, the assembly work of the connecting jig 6a cannot be performed, and if the attachment and the assembly work of the stator frame 12 and the connecting jig 6a are performed in series. However, there is a problem that the manufacturing time of the rotating electric machine becomes long. Further, as described above, the connecting jig 6 includes a plurality of insulating laminated bodies 5 in which the connecting conductors of the ring-shaped conductor 4 are fitted into the concave grooves 8 provided on the side surfaces of the insulating clamp 7 and laminated. 12 had to be fixed by screwing and fixed, respectively, and there was a problem that the number of man-hours and work for assembling and mounting them was long.

An object of the present invention is to solve the above-mentioned problems and to independently mount an insulating laminated body for sandwiching a ring-shaped conductor which constitutes a connecting conductor between stator windings, without assembling it while bolting it to a stator frame. The purpose of the present invention is to provide a structure of a connecting jig which can be assembled by means of the above-mentioned method, so that the number of assembling steps and the working time can be reduced.

[0007]

In order to solve the above-mentioned problems, the present invention covers a plurality of insulating laminated bodies arranged in the circumferential direction of a ring-shaped conductor and covers end faces of these insulating laminated bodies. The insulating laminated body is fixed to the side wall surface of the stator frame with bolts through the ring seats.

Further, it is preferable that the clamp groove of the insulating clamp is formed by a notch portion of the end portion of the insulating clamp, and a part of the ring-shaped conductor in the width direction is fitted and sandwiched between the notch portions. is there.

[0009]

According to the present invention, in a connecting jig composed of an insulating laminated body in which a ring-shaped conductor is fitted between clamp grooves of an insulating clamp, assembled, and held, the stator is fixed by a bolt penetrating the insulating clamp. Instead of bolting and fixing directly to the frame, one end of the bolt penetrating the insulating laminated body is arranged so as to penetrate the ring seat, and the bolts are fixed from both ends of this bolt. As a result, the insulating laminated body is unitized so that the ring-shaped conductor and the insulating clamp can be tightened and assembled without directly attaching the insulating laminated body to the stator frame, and the ring seat is attached and fixed to the stator frame. Thus, the connecting jig can be manufactured without waiting for the completion of the assembly of the stator frame of the rotating electric machine.

Further, a state in which a part of the conductor width of the ring-shaped conductor is tightened from the outer periphery by a plurality of circumferentially arranged insulating laminates, with the clamp groove serving as a notch formed by notching the end of the insulating clamp. By sandwiching the ring-shaped conductor between the insulating clamps, the assembly and fixing work for fitting the ring-shaped conductor between the insulating clamps becomes easy.

[0011]

EXAMPLES The present invention will be described below based on examples.
1 and 2 show a connecting jig for a stator winding according to an embodiment of the present invention. FIG. 1 shows a stator including a connecting jig for connecting between poles of a stator winding. FIG. 2 is a partial cross-sectional view in the vicinity of the winding end portion, and FIG. 2 is a partial perspective view of an insulating laminated body sandwiching a connecting conductor made of a ring-shaped conductor. In addition,
The drawings respectively correspond to FIGS. 5 and 6 of the related art, and the same parts as those of the related art are denoted by the same reference numerals and detailed description thereof will be omitted. In FIG. 1, an insulating clamp 7 that constitutes an insulating laminated body 5 of a connecting jig 6 for conductively connecting the stator windings 1 and a ring-shaped conductor 4 are provided for fitting and sandwiching from both sides. The clamp groove 8 formed of a U-shaped concave groove provided on both side surfaces of the insulating clamp 7 has the same structure as the conventional one (FIGS. 4 and 5).

As shown in FIGS. 1 and 2, a stator of an insulating laminated body 5 in which an insulating clamp 7 is first laminated and a ring-shaped conductor 4 having an insulating layer 4a on the outer periphery is fitted and clamped in a clamp groove 8. The ring seat 14 is arranged on the end surface on the side fixed to the frame 12. Then, the stud bolt 11 is inserted through the bolt insertion hole 10 of the insulating clamp 7 and the ring seat bolt insertion hole 14a provided in the ring seat 14 communicating with the bolt insertion hole 10, and the nuts 13a, The connecting jig 6 is configured so that the insulating laminated body 5 can be integrally laminated with the ring seat 14 by 13a and can be clamped and fixed. The above-mentioned ring seat 14 is made of iron, and a plurality of insulations sandwiching a predetermined number of ring-shaped conductors 4 according to the number of phases of the stator windings of the rotating electric machine are arranged in the circumferential direction of the ring seat 14 at intervals. The laminated body 5 is bolted with bolts 11, respectively.
Further, in order to fix the connecting jig 6 which is formed by tightening and assembling together with the ring seat 14 to the stator frame 12, a plurality of bolt insertion holes 15a provided in the circumferential direction of the ring seat 14 are provided. Bolt 15 is inserted and stator frame 12
It is performed by screwing it into the screw hole 12b provided in the. In addition,
The bolts 15 are fastened and fixed to the stator frame 12 by fixing the tip of the stud bolt 13 and the nut 13a on the ring seat 14 side where the insulating laminated body 5 of the connecting jig 6 is fastened.
In order not to contact the stator frame 12, the ring seat 14 is provided with a projecting portion to which the spacer 16 is welded and connected so as to communicate with the bolt insertion hole 15a so that the space is maintained.

As described above, the insulating laminated body 5 is fixed to the ring seat 14 with the bolts so that the insulating laminated body 5 can be independently laminated and assembled. As shown in FIG. 2, the ring seat 14 is placed horizontally on a surface plate (not shown). The insulating laminated body 5 is assembled and fixed to the ring seat 14 in a state that the connecting jig 6
Can be easily manufactured, and the work can be performed in parallel with the work of mounting the stator frame of the rotating electric machine.

FIGS. 3 and 4 show a stator winding connecting jig according to another embodiment of the present invention.
FIG. 4 is a partial sectional view of the vicinity of a stator winding end portion including a connecting jig, and FIG. 4 is a partial perspective view of an insulating laminated body holding a ring conductor. The difference from the above-described embodiment of the present invention lies in the configuration of the clamp groove 8a provided in the insulating clamp 7a that constitutes the insulating laminated body 5a that holds the ring-shaped conductor 4 therebetween. As shown in FIGS. 3 and 4, the insulating clamp 7a
The structure of the clamp groove 8a for sandwiching the ring-shaped conductor 4 provided on the side surface of the insulating clamp 7a is formed by a notch cut out at the end of the insulating clamp 7a so as to sandwich a part of the ring-shaped conductor 4. . Even in such a configuration of the clamp groove 8a, a plurality of insulating laminated bodies 5a forming the connection jig 6 for sandwiching and supporting the ring-shaped conductor 4 are arranged in the ring seat 14 at intervals in the circumferential direction of the ring-shaped conductor 4. Since the ring-shaped conductor 4 is fixed by bolting to the ring-shaped conductor 4, a tightening force acts on the ring-shaped conductor 4 in the inner diameter direction of the rotating electric machine to firmly fix the ring-shaped conductor 4 to the insulating laminated body 5a.

[0015]

As described above, according to the present invention, the connecting conductors made of a plurality of ring-shaped conductors arranged on the outer periphery of the end portions of the stator windings for conductively connecting the stator windings of the rotating electric machine are sandwiched. Then, the structure of the stator winding connection jig that is fixed to the stator frame can be fixed to the stator frame by bolting an insulating laminate consisting of insulating clamps that are stacked by stacking ring-shaped conductors. The bolts are fixed from both ends of the bolt penetrating the insulating laminated body through the ring seat.
Thus, the insulating laminated body is not bolted to the stator frame to be laminated, but the ring-shaped conductor and the insulating clamp are independently bolted together with the ring seat to produce the insulating laminated body to assemble the connection jig. Therefore, the assembling work of the connecting jig can be performed in parallel with the assembling and assembling work of the stator frame of the rotating electric machine, and the manufacturing time of the rotating electric machine can be reduced. In addition, as described above, the assembly work of the connection jig can be performed separately. Can be reduced and work safety can be ensured.

Further, since the clamp groove is formed as a notch formed by notching the end of the insulating clamp so as to sandwich a part of the ring-shaped conductor, the work of assembling and fixing the ring-shaped conductor to the insulating clamp can be facilitated. Become.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view near a stator winding end portion including a connecting jig for connecting between poles of a stator winding according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of an insulating laminated body that constitutes a connection jig that sandwiches a ring-shaped conductor.

FIG. 3 is a partial cross-sectional view in the vicinity of a stator winding end portion having a connecting jig according to another embodiment of the present invention.

FIG. 4 is a partial perspective view of the insulating laminate of FIG.

FIG. 5 is a partial cross-sectional view in the vicinity of a stator winding end portion formed of a conventional connecting jig.

6 is a partial perspective view of the insulating laminate of FIG.

[Explanation of symbols]

 1 Stator Winding 4 Ring Conductor 5 Insulating Laminate 5a Insulating Laminate 6 Connecting Jig 6a Connecting Jig 7 Insulating Clamp 7a Insulating Clamp 8 Clamp Groove 8a Clamp Groove 10 Bolt Insertion Hole 11 Stud Bolt 12 Stator Frame 14 Ring seat

Claims (2)

[Claims] 1. A connecting conductor formed of a ring-shaped conductor, which is arranged in a predetermined number on the outer periphery of an end portion of a stator winding of a rotary electric machine and connects between the stator windings inserted into the core slots of the stator core. Is a connecting jig for fixing the ring-shaped conductor in a clamp groove provided on the side surface of a rectangular insulating clamp, and the insulating clamps are stacked in the axial direction of the rotating electric machine to form a predetermined number of rings. Insulating laminated body sandwiching the conductor
Arranged with a plurality of intervals in the circumferential direction of the ring-shaped conductor,
In a stator winding connecting jig in which these insulating laminated bodies are fixed to the stator core end with a through bolt that penetrates in the laminating direction of the insulating clamp, a plurality of insulating laminated bodies are arranged in the circumferential direction of the ring-shaped conductor. Each of the bodies is bolted with a through bolt together with a ring seat arranged to cover the end faces of these insulating laminated bodies, and the insulating laminated body is bolted to the side wall surface of the stator frame through the ring seats. A fixture for connecting a stator winding of a rotating electric machine, which is fixable. 2. A jig for connecting a stator winding of a rotary electric machine according to claim 1, wherein the clamp groove provided on the side surface of the insulating clamp comprises a cutout portion formed by cutting out an end portion of the insulating clamp. A jig for connecting a stator winding of a rotating electric machine, wherein a part of the ring-shaped conductor in the width direction is fitted and sandwiched between the cutout portions.