JPH10126998A - Stator motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stator for motor in which the stator winding can be protected against damage due to cutting of a binding thread or a lacing machine, assembling work can be facilitated inexpensively without requiring any self-fusing wire or varnish and the coil end is secured while being covered by an insulating resin member where extraction of oligomer is suppressed. SOLUTION: Stator windings 2 of a plurality of poles are wound around a cylindrical stator core 1 having a plurality of slot openings in the inside diametral part. A plurality of annular insulating resin members 3, each having an opening for wrapping the coil end along the profile thereof are arranged in the center of the pole in order to cover and secure the coil end. This structure facilitates the assembling work inexpensively and realizes the stator for a motor where extraction of oligomer is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator in which a coil end of a stator winding of an electric motor is fixed by an insulating resin member.

[0002]

2. Description of the Related Art As a conventional method of fixing a coil end of a stator winding in a stator of an electric motor, a method of fixing the coil end of the stator winding with a restraining thread is generally employed. . As other fixing methods, a method has been adopted in which the self-fused electric wires are heated to a certain temperature to fix the electric wires, or a varnish or the like is applied to the coil end and dried and fixed.

[0003] As a method of covering the coil end of the stator winding of an electric motor with an insulating resin member, Japanese Utility Model Publication No. 7-23.
No. 007 discloses this. As shown in FIG. 6, the coil end of the stator winding 2 is covered by a coil end cover member 3 formed of an annular film.

[0004]

However, in the conventional method of fixing the coil end of the stator winding of an electric motor, for example, in the case of fixing with a restraining thread, the restraining thread may break or become fuzzy during knitting. I do. Alternatively, when the restraining yarn is knitted by the racing machine, the tip of the needle of the racing machine hits the stator winding and the stator winding may be damaged, which may be one of the factors that cause a layer short. Moreover,
There are problems such as a large capital investment burden for employing a racing machine.

Another method of fixing the stator winding of the electric motor is a self-fusing electric wire. This is a method in which the self-fused electric wires are heated to a certain temperature to fix the electric wires to each other, but the price of the self-fused electric wires is much higher than that of a commonly used electric wire. This self-fused electric wire is coated with a resin or the like (adhesive) that melts when a certain temperature is heated to a normal electric wire. Therefore, when compared with a normal same electric wire, since the resin or the like (adhesive) is applied,
Since the diameter of the electric wire becomes large and the slip property is not good, there is a problem that the winding workability is extremely reduced. Further, when a varnish or the like is applied to the coil end and dried and fixed, there is a problem that the work of applying the varnish or the like requires man-hours and requires a drying furnace.

On the other hand, when this electric motor is used for a compressor for a compressor (for example, an air conditioner, a refrigerator, a dehumidifier, etc.), the amount of oligomers extracted is low because the insulating resin member is used in a refrigerant such as R-22. There are many problems. The oligomer extracted from the insulating resin member causes clogging of the capillary tube in the refrigeration cycle. Therefore, the insulating resin member that covers the entire coil end as disclosed in Japanese Utility Model Publication No. Hei 7-23007 uses a large amount of the insulating resin member, which may cause clogging of the capillary tube. It is desirable that the amount of the insulating resin member used be as small as possible.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an electric motor stator which is inexpensive, facilitates the assembling work, and suppresses the amount of oligomers extracted.

[0008]

In order to solve this problem, the invention according to claim 1 of the present invention is directed to a coil end of a multi-pole stator winding wound on a cylindrical stator core. A plurality of insulating resin members having a curved coil end cover portion that wraps the coil end along the coil end shape are arranged, and at least one is arranged at the center of the coil end of the stator winding of one pole. And the stator winding is fixed.

[0009] This makes it possible to prevent the restraining thread from breaking when the restraining thread is used, to prevent the fixed winding from being damaged by the lacing machine, and to be inexpensive without using a self-fusing electric wire or varnish. In addition, the stator of the electric motor can be obtained in which the assembling operation is easy and the amount of the oligomer is reduced because the amount of the insulating resin member is reduced.

[0010] According to a second aspect of the present invention, a cylindrical tube extending along the inner diameter of the coil end is provided on the coil end of the stator winding wound around the cylindrical stator core. An insulating resin member having a plurality of curved coil end covers extending toward the outer diameter side from the cylinder so as to surround the coil end is disposed, and the stator winding is fixed.

Thus, the stator winding is inexpensive and easy to assemble, and the stator winding is protected by the insulating resin member provided with a cylindrical tube along the inner diameter of the coil end. As a result, it is possible to obtain a stator of a motor in which the amount of oligomers extracted can be suppressed because the use of insulating resin members is reduced while preventing contact with the stator.

According to a third aspect of the present invention, the curved coil end cover of the insulating resin member is provided so that the coil end of the stator winding wound around the cylindrical stator core is more securely fixed. A protruding portion or a protruding object is provided near the tip end toward the coil end side.

[0013] This makes it possible to prevent the insulating resin member from coming off from the outer diameter side of the coil end of the stator winding, thereby obtaining a motor stator that more securely fixes the coil end.

According to a fourth aspect of the present invention, there is provided an insulating resin member for covering a coil end of a stator winding wound on a cylindrical stator core and fixing the stator winding, and a plurality of holes. Is provided.

[0015] Thus, it is possible to reduce the amount of the insulating resin member provided with the holes, and to obtain a motor stator in which the amount of oligomers extracted can be suppressed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a stator winding having a plurality of poles is wound around a cylindrical stator core having a slot having a plurality of openings in an inner diameter portion. In an electric motor composed of a stator and a rotor arranged on an inner diameter portion of the stator core, a coil end is wrapped around a coil end of the plural-pole stator winding wound on the stator core. A plurality of insulating resin members having such a curved coil end cover portion are arranged, and at least one insulating resin member is provided.
The stator is arranged at the center of the coil end of the stator winding of one pole, and the stator winding is fixed. Prevents breakage of the restraining thread and damage to the stator windings caused by the racing machine. It is inexpensive and easy to assemble without using self-fused electric wires or varnish. Therefore, it is possible to obtain an electric motor stator in which the amount of oligomers extracted can be suppressed.

According to a second aspect of the present invention, there is provided a stator in which a stator winding is wound around a cylindrical stator core having a slot provided with a plurality of openings in the inner diameter, and an inner diameter of the stator core. In the electric motor composed of the rotor arranged in the section,
The coil end of the stator winding wound around the stator core is a cylindrical tube along the inner diameter of the coil end, and wraps the coil end toward the outer diameter side from the cylindrical tube. The stator of the electric motor is characterized in that an insulating resin member having a plurality of extending curved coil end covers is arranged and the stator winding is fixed. An electric motor that has an action and further protects the stator winding with an insulating resin member having a cylindrical tube along the inner diameter of the coil end, thereby preventing the stator winding from contacting the rotor. A stator is obtained.

According to a third aspect of the present invention, the curved coil end cover portion is provided with a projection or a protrusion near the tip end toward the coil end side. 2. The stator of the electric motor according to claim 2, which has the same operation as that of claim 1, and further prevents the insulating resin member from being detached from the outer diameter side of the coil end of the stator winding. Therefore, an effect is obtained that a stator of the electric motor that more securely fixes the coil end can be obtained.

According to a fourth aspect of the present invention, there is provided the motor stator according to the first or second aspect, wherein the insulating resin member is provided with a plurality of holes.
The amount of the insulating resin member provided with the holes can be further reduced, which has the effect of reducing the amount of oligomer to be extracted.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view of a stator of a motor according to an embodiment of the present invention, and FIG. 2 is a sectional view of the motor according to an embodiment of the present invention. In FIG. 2, a cylindrical stator core 1 provided with a plurality of slot openings 6 in an inner diameter portion is wound by a stator winding 2 having a plurality of poles.
Together with the wedge 4, it forms a stator. The stator and the rotor 5 constitute an electric motor. Insulation having a plurality of coil end covers 3b at the coil ends of the stator winding 2 and wrapping the coil ends along the coil end shape arranged at the center of the coil end of the stator winding. The coil end is fixed by the resin member 3. The insulating resin member 3 is made of a polymer resin, and is not particularly limited. For example, a thermoplastic resin such as polyester, polystyrene, polyvinyl chloride, and polycarbonate can be exemplified. Polyester is preferred.

(Embodiment 2) FIG. 3 is a perspective view of an insulating resin member according to another embodiment of the present invention. This is a type in which a cylindrical tube 3a that fits the inner diameter of the coil end and a shape 3b that can cover several places of the coil end are integrated, and acts to fix the coil end of the stator winding 2. It is.

(Embodiment 3) FIG. 4A is a perspective view of an insulating resin member according to another embodiment of the present invention. This is because the insulating resin member 3 covers the coil end so as to securely fix the coil end. In this case, the protrusion 10 is fixed so as not to come off from the outer diameter side of the coil end of the stator winding 2.

FIG. 4B is a perspective view of an insulating resin member according to another embodiment of the present invention. This is because a sawtooth-shaped protrusion 10 is formed on the tip of the curved coil end cover 3b of the insulating resin member 3 covering the coil end so as to securely fix the coil end toward the coil end.
With the insulating resin member 3 provided with the shape, the protrusion 10 is fixed so as not to come off from the outer end side of the coil of the stator winding 2.

(Embodiment 4) FIG. 5 is a perspective view of an insulating resin member according to another embodiment of the present invention. This has the effect of fixing the coil end of the stator winding 2 and suppressing the amount of oligomer extracted by the insulating resin member 3 having a plurality of holes 11 formed therein.

[0026]

As described above, according to the present invention, it is possible to prevent the restraining thread from being broken when the restraining thread is used, to prevent the stator winding from being damaged by a racing machine, and to perform self-fusion. An advantageous effect is obtained in that it is inexpensive and easy to assemble without using wires and varnishes, and that the amount of oligomers extracted is suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a stator of a motor showing an embodiment of the present invention.

FIG. 2 is a sectional view of an electric motor showing an embodiment of the present invention.

FIG. 3 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 4A is a perspective view of a main part showing another embodiment of the present invention. FIG. 4B is a perspective view of a main part showing another embodiment of the present invention.

FIG. 5 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 6 is a perspective view of a conventional motor stator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Stator winding 3 Insulating resin member 3a Cylindrical cylinder 3b Curved coil end cover part 4 Wedge 5 Rotor 6 Slot opening 10 Convex part or protrusion 11 hole

Claims (4)

[Claims] A stator having a plurality of stator windings wound around a cylindrical stator core having a slot provided with a plurality of openings in an inner diameter portion, and a stator disposed on the inner diameter portion of the stator core. Insulating resin member having a curved coil end cover portion that wraps a coil end around a coil end of the multi-pole stator winding wound around the stator core A plurality of the stator windings, and at least one of the stator windings is arranged at the center of the coil end of the stator winding of one pole, and the stator winding is fixed. 2. A stator in which a stator winding is wound around a cylindrical stator core having a slot provided with a plurality of openings in an inner diameter portion, and a rotor disposed in the inner diameter portion of the stator core. In the electric motor constituted by the above, the coil end of the stator winding wound on the stator core, a cylindrical tube along the inner diameter of the coil end, and the outer diameter side of the cylindrical tube A stator for an electric motor, wherein an insulating resin member having a plurality of curved coil end covers extending toward the coil end is disposed to fix the stator winding. 3. The stator for an electric motor according to claim 1, wherein the curved coil end cover has a projection or a protrusion near the tip end toward the coil end. . 4. The stator according to claim 1, wherein the insulating resin member has a plurality of holes.