JP2003111330A - Insulating method for jointed section of a plurality of electric conductors forming rotating electric machine and coil thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more easily insulate jointed sections between a plurality of conductor segments. SOLUTION: As a covering member 30, a thermosetting insulation resin is used which is bonded to the jointed section 28 by pressing the jointed section 28 for plastic deformation. Fitting the covering member 30 on the jointed section 28 of the plurality of conductor segments 26 inserted into a slot 24 in a stator core 22 is performed by pressing the disc-shaped covering member having a large size including an area in which the jointed section 28 is arranged and a prescribed allowance region and then curing it by heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine and a method for insulating a joint portion of a plurality of electric conductors forming a coil thereof, and more specifically, to a joint electric device formed by joining a plurality of electric conductors and a joint portion of the coil. The present invention relates to a rotating electric machine including a coil forming at least a part of an end and a method of insulating a joint portion of a plurality of electric conductors forming the coil.

[0002]

2. Description of the Related Art Conventionally, as a rotating electric machine having a coil formed by joining a plurality of electric conductors (conductor segments), a plurality of U-shaped conductor segments included in a coil end of a stator are joined to each other. A device with a cap attached is proposed (Japanese Patent Laid-Open No. 2000-209802). In this rotary electric machine, a vacant chamber of a cap capable of accommodating the joint is filled with a liquid or powder insulating resin, and the joint is immersed therein and the insulating resin is cured by heating etc. The insulation of is secured.

It has also been proposed to form an insulating film at the joint by immersing the joint of the conductor segment heated to the curing temperature in a tank filled with powder or liquid resin. (JP 2001-86683 A, etc.).

[0004]

However, in the former case, it is difficult to accurately accommodate the joint portion in the cap, and since the insulating treatment requires two members, the cap and the liquid resin, the structure becomes complicated. It is also disadvantageous in terms of cost.
Further, in the latter case, the insulating film may not be formed uniformly, and the insulating property of the joint may not be sufficiently ensured.

An object of the rotating electric machine of the present invention is to solve these problems and to improve the work efficiency of insulation treatment while ensuring the insulation of the joint. Another object of the rotating electrical machine of the present invention is to more easily fix a plurality of joints.

Another object of the method for insulating a joint portion of the present invention is to improve the work efficiency of the insulation treatment while ensuring the insulation of the joint portion.

[0007]

MEANS FOR SOLVING THE PROBLEMS AND OPERATIONS AND EFFECTS THEREOF The rotating electric machine and the method for insulating a joint according to the present invention employ the following means in order to achieve at least a part of the above objects.

A rotary electric machine according to the present invention is a rotary electric machine having a coil which is formed by joining a plurality of electric conductors and the joint portion of which forms at least a part of a coil end.
The gist of the invention is that an insulating resin that is plastically deformed and bonded by pressure contact with the joint is formed in the joint.

In this rotating electric machine of the present invention, the insulating resin is plastically deformed by pressure contact with the joints of the plurality of electric conductors and adheres to the joints. It can be simple. As a result, the work efficiency of the insulation treatment can be further improved,
The manufacturing efficiency of the rotating electric machine can be further improved.

In the rotating electric machine of the present invention, the joint portion may be adhered so as to cover the joint portion with the insulating resin. In this way, the insulation of the joint can be made stronger.

Further, in the rotating electric machine of the present invention, the insulating resin may form an integral block that is bonded to a plurality of the joint portions. This way
It is possible to hold and fix the plurality of joint portions in a separated state.

The method of insulating a joint according to the present invention is a method of insulating a joint in a coil which is formed by joining a plurality of electric conductors and which joint forms at least a part of a coil end. The gist of the present invention is to include a step of pressing the joint portion against an insulating resin having a predetermined viscosity to plastically deform the insulating resin.

In the method for insulating a joint portion according to the present invention, the joint portion is pressed against an insulating resin having a predetermined viscosity to plastically deform the insulating resin. It can be anything. As a result, the work efficiency of the insulation treatment can be further improved, and the manufacturing efficiency of the rotating electric machine can be further improved.

In the method for insulating a joint portion according to the present invention as described above, there is provided a step of extruding a resin material as the insulating resin onto a predetermined holding surface through an extruding die, and the step of plastically deforming the insulating resin is performed as described above. It may be a step of pushing the joint portion into the insulating resin extruded on a predetermined holding surface. In this way, the work efficiency of a series of insulation treatments can be further improved.

Further, in the method of insulating a joint according to the present invention, the resin material extruded on the predetermined holding surface through the die for extruding is located at a position corresponding to the positions of the plurality of joints. It is also possible to form a plurality of separate blocks. By doing so, even when the plurality of joints are inserted into the resin of the plurality of blocks for insulation, the plurality of resin blocks are arranged on the holding surface in a state of being preliminarily positioned at a position corresponding to the position of the joints. Therefore, the work efficiency of the insulating process of the joint can be further improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram showing an outline of an internal configuration of a rotary electric machine 10 which is an embodiment of the present invention, and FIG. 2 is a joint portion 28 of a plurality of U-shaped conductor segments 26 inserted into a slot 24. It is explanatory drawing explaining the mode that the covering member 30 is attached to. Rotary electric machine 10 of the embodiment
Is the slot 24 of the stator core 22 as shown.
The stator 20 has a U-shaped conductor segment 26 inserted into the end thereof and is regularly joined to the ends of other conductor segments 26 to form a three-phase coil. In the embodiment, the rotating electric machine 10 of the embodiment is a permanent magnet type synchronous generator motor, and a rotating magnetic field is formed by applying three-phase AC power to the three-phase coil formed by the conductor segment 26. Rotational power is output from the rotary shaft 14 due to the interaction between the magnetic field and the magnetic field generated by the permanent magnet attached to the rotor 12. Further, the rotary electric machine 10 of the embodiment
Is a generator motor, it is possible to generate power by inputting power to the rotating shaft 14. In the embodiment, the rotary electric machine 10 is configured as a synchronous generator motor that is rotationally driven by three-phase AC power, but it may be any type of rotary electric machine that is rotationally driven by multi-phase AC power.

The joint portion 28, which is a portion where the ends of the two conductor segments 26 are joined, has a disk-like shape having an insulating property including a range where the joint portion 28 is arranged and a predetermined margin area. The covering member 30 is attached. The covering member 30 is plastically deformed by being pressed with a predetermined pressure from the joint portion 28, has a viscosity such that it does not flow on the table 32 when the extrusion molding described later is performed, and further covers after hardening. Thermosetting insulating resin (for example, epoxy resin, polyurethane resin, polyamide resin, or the like) having an adhesive strength (peeling strength) to the joint portion 28 that does not fall off due to the weight of the member 30 and vibration during operation of the rotating electric machine 10. It is formed by.

The covering member 30 is attached to the joint portion 28 as shown in the process illustrated in FIG. That is, first, using a die for extrusion molding that is hollowed out into a disc shape, extrusion molding is performed so that the covering member 30 is placed on the flat base 32 (step S10), and the joint 28 is placed on the base 32. Covering member 30
By pressing and adhering (step S12), and then heating and curing the covering member 30 (step S14),
Installation is complete.

According to the rotary electric machine 10 of the above-described embodiment, the insulation of the joint portion 28 can be secured only by pressing the joint portion 28 against the covering member 30 and curing it by heating. As a result, the work efficiency of the insulation treatment can be further improved, and the manufacturing efficiency of the rotary electric machine 10 can be further improved. Further, since the covering member 30 has a disk shape having a size including the range where the joint portion 28 is arranged and a predetermined margin area, the position where the joint member 28 is pressed against the covering member 30 is slightly displaced. However, sufficient insulation can be ensured. Further, since the area in which the joint portions 28 are formed is covered with the integral covering member 30, the relative position of each joint portion 28 is maintained by the covering member 30 after curing, whereby each joint portion 28 is fixed. It can be held and fixed in a separated state.

In the rotating electric machine 10 of the embodiment, the covering member 30
Although a disk-shaped one is used as the above, any shape can be used as long as it can cover the individual joint portions 28. For example, as shown in FIG. 4 (a), the rotor 12 is aligned with the area where the joint 28 is arranged, and
A ring-shaped (donut-shaped) covering member 30B excluding a portion corresponding to is used, or as shown in FIG.
8 using a radial covering member 30C provided with a large number of integral blocks for connecting a plurality of joints 28 arranged in the radial direction to each other, or as shown in FIG. Covering member 30D consisting of many blocks for covering
You can also use. The covering member having each of these shapes can be formed by using a die that is hollowed out corresponding to each shape. 5 (a) and 5 (b),
4A and 4B show extrusion dies 40 and 40B for molding the covering member shown in FIGS. In particular, when an integral one is not used as the covering member (the covering members shown in FIGS. 4 (b) and 4 (c) above), the covering member is extrusion-molded so that the covering member is directly placed on the flat base. Since the position of each block in the covering member on the table can be set to the position corresponding to the position of each joint, and the relative position between the blocks can be easily maintained, the joint can be pressed against the covering member as it is. The workability can be further improved.

In the rotating electric machine 10 of the embodiment, the covering member 30
Although a heat-curable material is used as the material, if a member that can be cured at room temperature is used, it is possible to cure the covering member 30 by leaving it at room temperature. A thermoplastic material can also be used as long as it has a sufficiently high melting point.

Although the embodiments of the present invention have been described with reference to the embodiments, the present invention is not limited to the embodiments of the present invention, and various embodiments are possible without departing from the gist of the present invention. Of course, it can be implemented in.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of an internal configuration of a rotary electric machine 10 that is an embodiment of the present invention.

FIG. 2 is an explanatory view illustrating a state in which a covering member 30 is attached to a joint portion 28 of a plurality of U-shaped conductor segments 26 inserted into a slot 24.

FIG. 3 is an explanatory diagram illustrating an insulating process of a joint portion 28.

FIG. 4 is a diagram illustrating another covering member.

FIG. 5 is a diagram illustrating a mold for molding another covering member.

[Explanation of symbols]

10 rotating electric machine, 12 rotor, 14 rotating shaft, 20
Stator, 22 Stator core, 24 Slot, 26
Conductor segment, 28 joint, 30, 30B, 30
C, 30D coating member, 32 units, 40, 40B Extrusion die.

Continued front page    F term (reference) 5H603 AA04 BB01 BB07 BB09 BB10                       BB12 CA01 CA05 CB03 CB11                       CB22 CB26 CC03 CD22 CE02                       FA01 FA21 FA24 FA29                 5H604 AA05 AA08 BB01 BB03 BB10                       BB14 CC01 CC05 CC13 DA15                       DA19 DA23 DB02 DB18 PB02                       PB03 PC03                 5H615 AA01 BB01 BB02 BB07 BB14                       PP14 QQ12 RR01 RR09 SS10                       SS24 TT31 TT34 TT39

Claims (6)

[Claims] 1. A rotating electric machine comprising a coil formed by joining a plurality of electric conductors, the joining portion of which forms at least a part of a coil end, wherein the joining portion is pressure-contacted with the joining portion. A rotating electrical machine formed by an insulating resin that is plastically deformed and adheres. 2. The rotating electric machine according to claim 1, wherein the joint is adhered to the joint so that the insulating resin covers the joint. 3. The rotating electric machine according to claim 1, wherein the insulating resin forms an integral block that adheres to a plurality of the joints. 4. A method for insulating a joint portion of a coil formed by joining a plurality of electric conductors, the joint portion forming at least a part of a coil end, the joint portion having a predetermined viscosity. An insulating method comprising the step of pressing the insulating resin to have a plastic deformation of the insulating resin. 5. The insulating method according to claim 4, further comprising a step of extruding a resin material as the insulating resin onto a predetermined holding surface through an extrusion die, and the step of plastically deforming the insulating resin. An insulating method which is a step of pressing the joint portion against the insulating resin extruded on the predetermined holding surface. 6. The insulating method according to claim 5, wherein the resin material extruded on the predetermined holding surface through the extruding die is in a position corresponding to the positions of the plurality of joints. An insulating method comprising forming a plurality of blocks separated from each other.