JP2003164090A - Magnet coil and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnet coil which can improve the manufacturing yield by effectively preventing peeling of an insulation coat in bending. <P>SOLUTION: The magnet coil is constituted by forming a wire in which an electroconductive member is covered in the insulation coat into a predetermined form, and is formed by covering the electroconductive member which is bent at least along a part of the predetermined shape in the insulation coat. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet coil used in rotating electric machines, transformers, etc., and a method for manufacturing the same.

[0002]

2. Description of the Related Art A magnet coil having a wire formed of a conductive member coated with an insulating coating in a predetermined shape is used in various devices such as rotating electric machines and transformers. Hereinafter, a case where the magnet coil is used in a rotary electric machine will be described as an example. A rotary electric machine such as a motor includes a stator in which a plurality of coils are provided and a rotor arranged inside the stator. The stator has a stator core having a plurality of slots formed on the inner peripheral surface thereof, and a plurality of magnet coils mounted in the plurality of slots.

FIG. 3 shows an example of a conventional magnet coil. In a conventional magnet coil, one or a plurality of wires with an insulating coating, in which a conductive member 10 is covered with an insulating coating 20, is formed into a spiral shape (see FIG. 3).
Therefore, the insulating coating may be peeled off at the bent portion or the like, which causes a problem of poor manufacturing yield.
That is, in the conventional magnet coil, a conductive member 10 such as a copper wire is coated with an insulating coating 20 such as enamel, and then the wire with the insulating coating is subjected to a predetermined bending process. Therefore, during the bending process, the insulating coating may be peeled off at the bent portion or the like.

In particular, from the viewpoint of miniaturization and the like, it is necessary for the magnet coil to secure the number of windings of the wire while suppressing the diameter and axial length of the spiral coil. Along with the deformation stress about the axial direction A, the deformation stress in the direction along the axial direction A is also added. Therefore, the insulating coating is easily peeled off at the bent portion.

Both ends of the magnet coil are electrically connected via a connecting member such as a coil connecting wire.
In the conventional magnet coil, the entire conductive member is covered with an insulating film. Therefore, at the time of such connection work, it is necessary to peel off the insulating coatings on both ends of the magnet coil to expose the conductive member and then perform soldering or the like.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above prior art, and it is a magnet capable of effectively preventing peeling of the insulating coating during bending and improving the manufacturing yield. It is an object to provide a coil and a method for manufacturing the coil. Another object of the present invention is to provide a magnet coil and a method for manufacturing the same that can improve the work efficiency of electrical connection with an external member.

[0007]

In order to achieve the above-mentioned object, the present invention is a magnet coil comprising a wire having a conductive member coated with an insulating coating in a predetermined shape. Provided is a magnet coil in which an insulating film is coated on a conductive member bent into a shape along at least a part of the shape. Preferably 1
The predetermined shape may be formed by a single conductive member, and the insulating coating may be coated so that both ends of the single conductive member are exposed.

In order to achieve the above-mentioned object, the present invention provides
A magnet coil comprising a wire formed of a conductive member coated with an insulating coating in a predetermined shape, wherein the conductive member is exposed in a region forming a connection site with an external member, Provided is a magnet coil coated with an insulating coating.

Further, in order to achieve the above-mentioned object, the present invention is a method for producing a magnet coil in which a wire made of a conductive member coated with an insulating film is formed into a predetermined shape, and Provided is a method of manufacturing a magnet coil, which includes a step of bending a member into a shape along at least a part of the predetermined shape, and a step of covering the bent conductive member with an insulating film. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a magnet coil according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a manufacturing process of the magnet coil according to the present embodiment.

The magnet coil according to the present embodiment is
Used in rotating electrical machines such as motors and transformers. In the present embodiment, the case of application to a rotary electric machine will be described as an example. The stator of the rotating electric machine includes a plurality of slots arranged along the circumferential direction on the inner peripheral surface thereof, and the magnet coil is configured to be mounted in each of the plurality of slots.

The magnet coil is formed by forming a wire with an insulating coating, which has a conductive member such as a copper wire and an insulating coating such as enamel surrounding the conductive member, into a desired shape such as a spiral shape. It is obtained by doing. For more details,
In the magnet coil according to the present embodiment, one substantially linear conductive member 10 (see FIG. 1A) is bent into a shape that can be mounted in the slot (see FIG. 1A).
(see (b)), and the insulating film is coated in the final step (see FIG. 1 (c)).

That is, in the present embodiment, before the conductive member 10 is coated with the insulating film 20, the conductive member 1 is formed.
The desired bending process is performed on 0. Then, the insulating film 20 is coated on the conductive member 10 that has been formed into a desired shape. The insulating coating 20 is
It can be coated by various methods such as spraying and dipping such as electrostatic coating.

With the magnet coil having such a structure, the following effects can be obtained. That is, the conductive member 10 is subjected to a desired bending process, and then the conductive film 10 after the bending process is coated with the insulating coating film 20. Therefore, the insulating coating film 20 does not peel off during the bending process, and thus the manufacturing yield can be improved.

In order to save space, when the magnet coil is of a close-wound type in which adjacent coil windings are in close contact with each other, when the conductive member 10 is bent, The conductive member 10 is pitch-wound so that there is a predetermined gap between one winding formed by the conductive member and another winding adjacent to the one winding, and then the insulating coating film is formed. 20 is covered, and then one winding and another winding adjacent thereto are brought into close contact with each other with an adhesive or the like, or when the conductive member 10 is bent, it is closely wound to form an insulating coating. It is possible to forcibly separate adjacent windings during coating.

More preferably, at the time of forming the insulating coating, the portion 11 which is a connection region with an external member can be configured not to be coated with the insulating coating. With such a configuration, when the magnet coil is connected to an external member such as a coil connecting wire, the insulating coating 20 does not need to be peeled off, which allows the connection work to be performed efficiently. In such a configuration, for example, when the insulating coating is covered by dipping, the connecting portion 11 with the external member is not soaked, or when the insulating coating is covered by spraying, the connecting portion 1 is formed.
It can be easily obtained by masking 1.

It should be noted that the coating of the insulating film so that the connecting portion 11 with the external member does not exist should be applied independently of forming the insulating film after bending. Is also possible. That is, such an insulating coating method may be applied to the insulating coating forming step of the magnet coil formed by coating the conductive member with the insulating member and then bending the conductive member into a desired shape. it can.

Further, in the present embodiment, one conductive member 10 is spirally bent, but the present invention is not limited to such a form. That is, FIG.
As shown in FIG. 3, a plurality of U-shaped conductive members 15 obtained by bending the conductive member 10 into a substantially U-shape are provided adjacent to each other.
Of the U-shaped conductive members 15 (1) adjacent to the first end 15a (1) of the U-shaped conductive member 15 (1).
The present invention can also be applied to a magnet wire formed in a spiral shape by connecting the second end portion 15b (2) of the character-shaped conductive member 15 (2) with the connecting conductive member 16. is there.

The magnet wire having such a form can be manufactured as follows. That is, the conductive member 1
A plurality of U-shaped conductive members 15 and connecting conductive members 16 formed by bending 0 are prepared (see FIG. 2 (b)), and the plurality of U-shaped conductive members 15 and connecting conductive members are formed. Member 16
An insulative film is coated on the above (see FIG. 2 (c)). Then, the U-shaped conductive member 15 coated with the insulating film is
Arrange so that the corresponding sides of the adjacent members face each other, and
The first end 15 (1) a of one U-shaped conductive member 15 (1) and the second end 15 (2) of another U-shaped conductive member 15 (2) adjacent to the first end 15 (1) a.
b is electrically connected by the conductive member 16 for connection.

[0020]

According to the magnet coil of one aspect of the present invention, the electrically conductive member that has been bent is coated with the insulating film, so that the insulating film can be effectively prevented from peeling off. Therefore, the manufacturing yield can be improved.
According to the magnet coil of another aspect of the present invention,
Since the insulating film is coated so that the conductive member is exposed in the region where the connection portion with the external member is formed, the work efficiency of the connection with the external member can be improved.

[Brief description of drawings]

FIG. 1 is a process drawing showing a method of manufacturing a magnet coil according to an embodiment of the present invention.

FIG. 2 is a process drawing showing a method of manufacturing a magnet coil according to another embodiment of the present invention.

FIG. 3 is a perspective view of a conventional magnet coil.

[Explanation of symbols]

10 Conductive member 20 Insulating film

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI Theme Coat (Reference) H02K 3/04 H02K 3/04 Z 3/38 3/38 A 15/04 15/04 Z 15/12 15 / 12 D G F term (reference) 5E043 AA01 5E044 CA01 5H603 AA04 AA09 BB11 CB01 CB11 CB22 CB23 CB26 CD21 CE02 FA05 FA08 5H604 AA08 BB12 PB01 PB02 PB03 5H615 AA01 PP12 PP15 QQ02 SS07QR04 SS05QRQSS SS07

Claims (4)

[Claims] 1. A magnet coil comprising a wire formed by coating a conductive member with an insulating coating in a predetermined shape, the conductive coil being bent into a shape along at least a part of the predetermined shape. A magnet coil, characterized in that an insulating film is coated on the member. 2. The predetermined shape is formed by one conductive member, and the insulating coating is coated so that both ends of the one conductive member are exposed. The magnet coil according to claim 1. 3. A magnet coil comprising a wire formed by coating a conductive member with an insulating coating in a predetermined shape, wherein the conductive member is exposed in a region forming a connection portion with an external member. As described above, the magnet coil is coated with the insulating film. 4. A method of manufacturing a magnet coil, comprising a wire in which a conductive member is coated with an insulating coating in a predetermined shape, wherein the conductive member is provided along at least a part of the predetermined shape. A method of manufacturing a magnet coil, comprising: a step of bending into a bent shape; and a step of coating the bent conductive member with an insulating film.