JP2002233092A - Directly winding type electric motor, refrigerant compressor using the same and cooling device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a directly winding type electric motor capable of surely preventing an insulator from projecting to the inside diameter side of a stator and surely insulating between coils. SOLUTION: Insulators 5 positioned between the coils 4 wound around the adjacent tooth parts 2 of the directly winding type electric motor directly winding the coils 4 on the tooth parts 2 of the stator 1 respectively are provided. Holding parts 5A held by the coils 4 are provided on the insulators 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a series-wound electric motor in which coils are wound directly around teeth of a stator.

[0002]

2. Description of the Related Art Conventionally, an electric motor composed of a brushless DC motor is provided in a refrigerant compressor of an air conditioner, a refrigerator, a showcase or the like. The electric motor includes a stator, a rotor, and the like. A coil is wound around the stator, and a voltage is applied to the coil to rotate the rotor to operate the refrigerant compressor. The stator of the electric motor has a plurality of teeth provided at equal intervals around the inner surface of the stator, and the coils are intermittently provided on these teeth via a well-known cam unit such as a cam mechanism or a planetary gear mechanism. It is wound directly by a rocking rotation. When the coil is wound directly around the teeth of the stator, the coil is damaged by edges around the teeth. Therefore, in order to prevent the coil from being damaged, insulating paper is interposed between the tooth portion and the coil to improve the reliability of the coil against insulation failure.

On the other hand, between the coils of the stator of the series-wound electric motor, the wound coils may come into contact with each other to cause insulation failure. As a general insulating method between the coils, an insulating material formed of a hard synthetic resin having a high insulating property such as polyethylene terephthalate is conventionally inserted between the coils. Further, by inserting an insulating tube or the like into the lead wire of the coil, which is likely to be damaged in the operation of manufacturing the series-wound electric motor, the reliability against insulation failure of the coil is improved.

[0004]

However, since the coils of the stator of the series-wound electric motor are insulated from each other, when an insulating material formed of a hard synthetic resin is inserted between the coils, the insulating material is fixed to the stator. There was a problem that it protruded to the inner diameter side. In addition, vibration during the production of the motor, or the insulating material comes off during the operation of the motor,
There was also a problem that the reliability against insulation failure of the coil was reduced.

Further, when an insulating tube is inserted into the lead wire of the coil for insulation, there is a problem that the work is troublesome and the workability is extremely deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and can surely prevent the insulating material from protruding toward the inner diameter side of the stator. It is an object of the present invention to provide a series-wound electric motor that can be insulated.

[0007]

That is, a series-wound electric motor according to the present invention has a structure in which a coil is directly wound around teeth of a stator, and a coil is wound between coils wound around adjacent teeth. An insulating material is provided at a position, and the insulating material is provided with a holding portion that is held by a coil.

According to a second aspect of the present invention, in the above-mentioned series-wound electric motor, the insulating material is made of a plate-shaped insulating paper, and the holding portion is formed by bending the insulating paper. .

According to a third aspect of the present invention, there is provided a series-wound electric motor according to the first or second aspect, wherein the insulating material has a predetermined folded shape and the coil lead wire is sandwiched in the folded portion. It is.

[0010] Further, in the series-wound electric motor according to the invention of claim 4, in addition to claim 1, 2, or 3, the insulating material has a covering portion covering the coil end.

According to a fifth aspect of the present invention, in addition to the first, second, third or fourth aspect of the present invention, the insulating material holding portion has one or both of them. The width is gradually narrowed toward the coil end side.

A series-wound electric motor according to a sixth aspect of the present invention is a motor in which a coil is directly wound around teeth of a stator, and an annular insulating material surrounding the coil wound around the teeth is provided. It is provided.

[0013] The series-wound electric motor according to the invention of claim 7 is characterized in that, in addition to claim 6, an opening is formed in the surface of the insulating material on the coil end side.

According to an eighth aspect of the present invention, in addition to the sixth or seventh aspect, the series-wound electric motor holds the insulating material with a binding yarn that binds the coil end.

The series-wound electric motor according to the ninth aspect of the present invention is the same as that of the first, second, third, fourth, fifth, sixth, seventh or eighth aspects. In addition, an insulating material is provided corresponding to a coil in which stress occurs during production.

Further, the refrigerant compressor according to the tenth aspect of the present invention,
Claim 1, Claim 2, Claim 3, Claim 4, Claim 5,
According to a sixth aspect of the present invention, there is provided a series-wound electric motor according to any one of claims 6, 7, 8 and 9, and a compression unit driven by the series-wound electric motor in a case.

Further, a cooling device according to an eleventh aspect of the present invention includes a refrigeration cycle including the refrigerant compressor according to the tenth aspect.

According to the present invention, the series motor is provided with an insulating material positioned between the coils wound around the adjacent teeth, and the insulating material is provided with a holding portion held by the coil. Therefore, for example, as in claim 2, the insulating material is made of a plate-shaped insulating paper, and the holding portion is formed by bending the insulating paper. By simply inserting the holding portion between the coils, the insulating paper can be held between the coils. Thereby, it is possible to reliably prevent the inconvenience that the insulating paper is shifted toward the inner diameter side of the stator. Therefore, it is possible to reliably prevent the insulating paper from protruding toward the inner diameter side of the stator simply by inserting the holding portion between the two coils, and to surely insulate the coils from each other. .

According to the third aspect of the present invention, in the first or second aspect, the insulating material has a predetermined folded shape, and the lead wire of the coil is sandwiched in the folded portion. Both the members are fixed between the coils, so that the inconvenience of the insulating material falling out from between the coils and the inconvenience of the insulating material protruding toward the inner diameter side of the stator can be prevented. Thereby, for example, it is possible to greatly reduce the labor for inserting the lead wire into the tube as in the conventional case. Therefore, for example, it is possible to reliably fix the coil lead wire between both coils without inserting a tube into the coil lead wire, which is likely to be damaged in the operation of manufacturing a series-wound motor, for example. It is possible to provide a series-wound electric motor which can be greatly improved and has high reliability.

In particular, since it is possible to insulate other coil portions without inserting a tube into the lead wire of a coil which is apt to be damaged in the operation of manufacturing a series-wound electric motor as in the prior art, without insulating the tube. Thus, it is possible to provide a series-wound motor having a reduced number of parts, improved productivity, and high reliability.

According to the fourth aspect of the present invention, in addition to the first, second, or third aspect, the insulating material has a covering portion for covering the coil end. It is possible to reliably prevent the coil from being damaged. Thereby, the workability at the time of manufacturing the series-wound electric motor can be greatly improved. Therefore, it is possible to provide a series-wound electric motor with high reliability for insulation.

According to the fifth aspect of the present invention, in addition to the first, second, third, or fourth aspect, the insulating material holding portion is directed toward one or both coil ends. Since the width is gradually narrowed, the insulating material can be easily inserted between the coils simply by pressing the holding portion between the coils from the narrow side. Thereby, the workability of inserting the insulating material between the coils is improved, and the productivity of the series-wound electric motor can be greatly improved.

According to the sixth aspect of the present invention, the coil is wound directly around the teeth of the stator, and the annular insulating material surrounding the coil wound around the teeth is provided. The entire circumference of the coil can be protected by the insulating material. This makes it possible to insulate the entire circumference of the coil. Accordingly, the insulation around the entire circumference of the coil is sufficient only by inserting an annular insulating material, so that the productivity can be greatly improved.

According to the seventh aspect of the present invention, since the opening is formed on the surface of the insulating material on the coil end side, heat generated inside the insulating material can be radiated from the opening. As a result, the heat generation of the coil can be suppressed low, so that the reliability of the series-wound electric motor can be greatly improved. Therefore, it is possible to prevent the coil from being damaged by heat.

According to the eighth aspect of the present invention, in addition to the sixth or seventh aspect, the insulating material is held by the binding yarns for binding the coil ends. It is possible to prevent the inconvenience of protruding. Therefore, it is possible to reliably prevent the insulating material from protruding from the coil toward the inner diameter side of the stator, and it is possible to greatly improve the reliability of the series-wound electric motor.

According to the ninth aspect of the present invention, in addition to the first, second, third, fourth, fifth, sixth, seventh and eighth aspects, stress during production is Since the insulating material is provided corresponding to the coil in which the occurrence of the stress occurs, it is possible to reliably protect the portion where the coil is damaged by the stress by the insulating material. As a result, it is only necessary to provide the insulating material only at the coil portion where stress occurs during production, so that it is not necessary to insert the insulating material between the coils wound around the adjacent teeth, thereby greatly increasing productivity. Can be improved. Therefore, it is possible to provide a series-wound electric motor with high reliability for insulation with a small number of insulating materials.

According to the tenth aspect of the present invention, the refrigerant compressor is provided in any one of the first, second, third, fourth, fifth, sixth, seventh, eighth and eighth aspects. Item 9 includes the series-wound electric motor and the compression unit driven by the series-wound electric motor in the case, so that insulation failure of the series-wound electric motor at the time of manufacturing the refrigerant compressor can be significantly reduced. Becomes Therefore, it is possible to provide a refrigerant compressor having high reliability for insulation.

According to the eleventh aspect, the cooling device is
Since the refrigerating cycle including the refrigerant compressor according to claim 10 is provided, it is possible to greatly reduce insulation failure of the series-wound electric motor at the time of manufacturing the cooling device. Therefore,
This makes it possible to provide a cooling device with high reliability for insulation.

[0029]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a stator 1 in which an insulating material 5 is inserted between coils 4 of a series-wound motor of the present invention.
Shows perspective views of the insulating material 5, respectively. A series-wound electric motor is a brushless D which is mounted on a refrigerant compressor used for a cooling device such as an air conditioner, a refrigerator, and a showcase.
C motor. In the figure, reference numeral 1 denotes a stator 1 constituting a series-wound electric motor, in which a plurality of stator iron plates are stacked and a plurality of teeth 2 formed in a substantially rectangular shape on the inner peripheral side. The coil 4 is wound directly around the tooth portion 2 via the slot insulating paper 3.

Reference numeral 5 denotes an insulating material inserted between the coils 4. For example, the insulating material 5 has a thickness of about 0.075 mm as insulating paper.
It is composed of a plate-like polyester film 6 having a large insulating effect of 0.5 mm (actually 0.125 mm) and having elasticity (FIG. 3). The polyester film 6
It has a predetermined rectangular shape, and a mountain fold line 6A is provided substantially at the center in the left-right direction. The polyester film 6 is folded in two (mountain fold) around the mountain fold line 6A. You. The two-folded polyester film 6 is provided with a valley fold line 6B located slightly inward from both ends, and at this valley fold line 6B, the polyester film 6 is valley-folded and the ends thereof are mutually connected. They extend in the direction of separation.

By bending the polyester film 6 from a predetermined position in this way, the T-shaped insulating material 5 which is symmetrical in the vertical and horizontal directions is formed. The double part on the side of the mountain fold line 6A from the valley fold part is the insulating part 5B, and the opposite side is the holding part 5A. The insulating part 5B is made of an insulating material 5 having a coil 4
The length of the insulator 5 is set so as not to protrude toward the inner diameter side of the stator 1 while being inserted therebetween, and the insulating material 5 is set to a length not protruding above and below the stator 1. When the polyester film 6 is mountain-folded from the mountain fold line 6A, the insulating portion 5B
The holding portions 5A and 5A are separated from each other by about 5 mm to 10 mm, so that the holding portions 5A and 5A
This is preferable because it can be pressed against. 4 shows a front view of the insulating material 5 after bending the polyester film 6, FIG. 5 shows a state of the insulating material 5 as viewed from above, and FIG. FIG.

The thus-formed insulating material 5 is used for the tooth 2
When inserted between the coils 4 wound around, the two holding portions 5A of the insulating portion 5B separated by about 5 mm to 10 mm,
After the 5A side is brought into close contact, the insulating portion 5B is connected to both coils 4,
4 and at the same time, one side of both holding portions 5A, 5A is positioned and inserted on the stator 1 side between the coil 4 and the stator 1 (FIG. 7). In this case, since the insulating material 5 has elasticity, even if the gap between the coils 4 is different,
The insulating material 5 can be inserted between the coils 4 without worrying about the gap between the coils 4.

When the insulating material 5 is inserted between the coils 4, even if both the holding parts 5 A, 5 A are located between the coil 4 and the stator 1, from the stator 1 side to the inner diameter side of the stator 1, Since it has elasticity, it can be inserted between the coils 4 (FIG. 8). At this time, the insulating portion 5B
It is necessary to take care that the protrusion does not protrude toward the inner diameter side of the stator 1. As described above, the insulating material 5 that insulates the coils 4 and 4 wound around the teeth 2 of the stator 1 is formed by bending the polyester film 6 to form the insulating portion 5B and the holding portion 5.
A and 5A are provided and the upper, lower, left, and right sides are formed symmetrically as described above, so that the insulating material 5 can be inserted between the coils 4, 4 from either the upper or lower direction of the insulating material 5, and the assembling work can be performed. Performance can be improved.

FIG. 9 shows a state in which the lead wire 4A of the coil 4 is sandwiched in the folded portion of the polyester film 6 (between the double portions of the insulating portion 5B). in this case,
Lead wire 4A of coil 4 wound around tooth portion 2 of stator 1
Are inserted from between the holding portions 5A and 5A of the insulating material 5 and sandwiched between the insulating portions 5B. That is, since the lead wire 4A of the coil 4 is sandwiched in the insulating portion 5B, both the coil 4 and the insulating material 5 are fixed between the coils 4, and the insulating material 5 comes off from the space between the coils 4 and the insulating material 5 Is stator 1
The inconvenience of protruding toward the inner diameter side can be prevented beforehand. As a result, the lead wire 5 of the coil 4 can be fixed between the two coils 4 without inserting a tube into the lead wire 4A of the coil 4 which is likely to be damaged in the operation in the production of the series-wound motor, unlike the conventional case. Therefore, it is possible to reliably prevent the coil 4 from being damaged due to an external force applied from the periphery of the coil 4, and it is possible to greatly improve the reliability of the coil 4 against external damage.

FIG. 10 shows another insulating material 10. The insulating material 10 is constituted by a polyester film 11 similar to the above-described insulating material 5 (polyester film 6). The polyester film 11 is bent at a mountain fold line 11A located substantially at the center in the left-right direction, and the polyester film 11 is folded in two. The polyester film 11 folded in two is folded in a valley fold at a valley fold line 11B located slightly inside from both ends, and the ends extend in a direction away from each other.

By bending the polyester film 11 from a predetermined position in this way, a T-shaped insulating material 10 symmetrical in the vertical and horizontal directions is formed. The double part from the valley fold to the mountain fold line 11A is defined as the insulating part 10B, and the opposite part is defined as the holding part 10A. Both holding parts 10A, 10A
One side (lower side in the figure) of the holding portion 1A is located substantially at the center of the holding portion 10A in the vertical direction from the separation side of the insulating portion 10B to the lower side.
0A is inclined to the insulating portion 10B side, and the inclined portion 12 is cut.
Are formed. The holding portion 10A of the insulating material 10
It is formed in a shape that gradually becomes narrower toward the coil end (in this case, the winding start and end portions of the coil 4). That is, the insulating material 10 forms an inclined portion 12 that gradually becomes narrower below the insulating material 5.

When the polyester film 11 is mountain-folded from the mountain fold line 11A, it is preferable to separate the insulating portions 10B by about 5 mm to 10 mm, as described above. FIG. 11 is a front view of the polyester film 11, and FIG.
1 is a front view of the insulating material 10 after bending, FIG.
14 shows a state in which the insulating material 10 is viewed from above, and FIG. 14 shows a side view of the insulating material 10 in FIG.

When the insulating material 10 configured as described above is inserted between the coils 4 wound around the teeth 2, approximately 5 mm
Both holding parts 1 of the insulating part 10B separated by about 10 mm
After the 0A and 10A sides are brought into close contact with each other, the inclined portion 12 side of the insulating portion 10B is positioned between the coils 4 and 4 at the same time.
The two inclined portions 12, 12 are positioned on the stator 1 side between the coil 4 and the stator 1, and then inserted (in the direction of the arrow in FIG. 12).
In this case, since the holding portion 10A of the insulating material 10 forms the inclined portion 12 having a shape gradually narrowing toward the coil end side, the holding portion 10A is moved from the narrow inclined portion 12 side to the coil 4A. The holding portion 10 </ b> A can be easily inserted between the coils 4 simply by pressing it between the coils 4. Insulating material 1
Since 0 has elasticity, even when the gaps between the coils 4 are different, the insulating material 10 is inserted between the coils 4 without concern for the gap between the coils 4. be able to.

When the insulating material 10 is inserted between the coils 4, 4, even if both holding parts 10 A, 10 A are located between the coil 4 and the stator 1 and closer to the inner diameter side of the stator 1 than the stator 1 is, 10 has elasticity and forms an inclined portion 12 gradually narrowing toward the coil end side, so that the coil 10 is wound between the teeth 4 of the stator 1 as described above. It can be easily inserted. At this time, it is necessary to take care that the insulating portion 10B does not protrude toward the inner diameter side of the stator 1.

As described above, since the inclined portion 12 gradually narrows toward the coil end side in the insulating material 10, the holding portion 10A is simply pressed between the coils 4 from the narrow side. The insulating material 10 can be easily inserted between the coils 4. Thereby, the workability of inserting the insulating material 10 becomes preferable, and the productivity of the series-wound electric motor can be greatly improved. In the embodiment, the holding unit 10 is used.
Although the inclined portion 12 is provided below A, the inclined portion 12 may be provided on the upper side, and if the inclined portion 12 is provided on both the upper and lower sides, the insulating material 1 may be provided from any direction of the insulating material 10.
0 can be inserted between the coils 4 and 4, so that the assembling workability can be greatly improved.

Next, another insulating material 20 is shown in FIG. The insulating member 20 has a covering portion 23 for covering the above-described insulating member 10 with a coil end. Further, 21 is a polyester film, 21A is a mountain fold line, 21B is a valley fold line, 22 is an inclined portion, 20A is a holding portion,
0B indicates an insulating portion. The inclined portion 22 is formed below the holding portion 20A, and the covering portion 23 is
Is formed to extend a predetermined distance above the
It is bent at a substantially right angle in the extending direction of 0A. That is, the covering portion 23 is provided above the insulating material 20 and is bent in the direction of the holding portion 20A above the insulating portion 20B. Note that FIG.
17 is a front view of the polyester film 11, FIG. 17 is a front view of the insulating material 20 after bending the polyester film 11, FIG. 18 shows a state of the insulating material 20 of FIG. 17 viewed from above, and FIG. FIG. 18 illustrates a side view of the insulating material 20 of FIG. 17.

When the insulating material 20 configured as described above is inserted between the coils 4 wound around the teeth 2, approximately 5 mm
Both holding portions 2 of the insulating portion 20B separated by about 20 mm
After the 0A and 20A sides are brought into close contact with each other, the inclined portion 22 side of the insulating portion 20B is positioned between the coils 4 and 4, and both inclined portions 22 and 22 are positioned on the stator 1 side between the coil 4 and the stator 1. (FIG. 17 arrow direction). In this case, since the holding portion 20A of the insulating material 20 forms the inclined portion 22 having a shape gradually narrowing toward the coil end side, the holding portion 20A is moved from the narrow inclined portion 22 side to the coil 4A.
Just by pressing in between, the holding portion 20A can be easily inserted between the coils 4. Further, since the insulating material 20 has elasticity, even when the gap between the coils 4 is different, the insulating material 20 can be moved between the coils 4 without worrying about the gap between the coils 4. Can be inserted.

When the insulating material 20 is inserted, both holding portions 20A, 20A are connected between the coil 4 and the stator 1 by the stator 1A.
Even when the insulating material 20 is located on the inner diameter side of the stator 1 from the side, the insulating material 20 has elasticity and forms the inclined portion 22 that gradually becomes narrower toward the coil end side. It can be easily inserted between the coils 4 wound around the tooth portion 2. Also at this time, the insulating portion 2
Care must be taken that OB does not protrude toward the inner diameter side of the stator 1.

Then, with both holding portions 20A, 20A inserted between the coil 4 and the stator 1, the covering portion 23 comes into contact with the coil 4 (FIG. 20). And the stator 1
The above-mentioned lead wire 4A wound around the tooth portion 2 of the
It is pulled out from between B. That is, the lead wire 4A of the coil 4
Is drawn out of the insulating portion 20B and shaped on the covering portion 23, so that it is possible to prevent the coil 4 from being damaged by the rubbing between the lead wire 4A and the coil 4. Thereby, the workability at the time of manufacturing the series-wound electric motor can be greatly improved.

On the other hand, FIG. 21 shows a plan view of the stator 1 in which another insulating material 30 is inserted into the coil 4 of the series-wound motor. In the figure, reference numeral 30 denotes an insulating material. The insulating material 30 has a thickness of about 0.075 mm to 0.5 mm (actually,
It is formed in a belt-like shape by a plate-like polyester film 31 having a large insulating effect (25 mm) and elasticity. Welding portions 32 are formed at both ends of the belt-shaped polyester film 31, and the polyester film 31 is provided with two openings 31A formed in a predetermined shape at predetermined positions (FIGS. 22 and 23).

Then, the insulating material 30 is formed in an annular shape capable of surrounding the coil 4 wound around the tooth portion 2 by heat-welding and bonding the welding portions 32, 32. FIG.
4 is a front view of the annular insulating material 30, FIG. 25 is a side view of the insulating material 30, and FIG. 26 is a plan view of the insulating material 30. Then, an opening 3 is formed in the coil end and the surface facing the coil end.
In the state where 1A is located, the insulating material 30 formed in an annular shape
Is inserted into the coil 4, the insulating material 30 is bound by a binding thread (not shown) for binding the coil end, and the
Is held. Note that the insulating material 30 may be inserted into the adjacent coil 4, or the coil 4 may be inserted at one interval.

As described above, the polyester film 31 is formed in a ring shape, and the opening 31A formed in the polyester film 31 is positioned on the coil end side and the opposing surface on the coil end side, and the insulating material 30 is inserted into the coil 4 and inserted. I have. Since the insulating material 30 is bound by the binding yarn, the entire circumference of the coil 4 can be protected by the insulating material 30 without the insulating material 30 falling off from the coil 4. Further, the heat generated by the coil 4 whose entire circumference is protected by the insulating material 30 can be radiated from the opening 31A provided in the polyester film 31 located on the coil end side and the opposing surface on the coil end side. As a result, it is possible to prevent the coil 4 from being damaged, and naturally, it is possible to suppress the heat generation of the coil 4 to a low level.

In particular, if the insulating material 5 (including the insulating materials 10, 20, and 30) is provided corresponding to the coil 4 where stress is generated during production, the portion where the coil 4 is damaged by the stress is surely protected. It is possible to do. That is, only the portion of the coil 4 where the stress is generated during the production has the insulating material 5.
(Insulating materials 10, 20, and 30) may be provided, so that insulating materials 5 (including insulating materials 10, 20, and 30) are inserted between the coils 4 wound around the adjacent tooth portions 2. Labor can be reduced, and productivity can be greatly improved. This makes it possible to provide a series-wound electric motor with high insulation reliability with a small number of work steps.

Since such a series-wound motor is mounted on a refrigerant compressor used for a cooling device such as an air conditioner, a refrigerator, and a showcase, insulation failure of the series-wound motor during manufacture of the refrigerant compressor is greatly reduced. It can be reduced. In addition, air conditioners, refrigerators, showcases, etc. are equipped with a refrigeration cycle consisting of a refrigerant compressor equipped with a series-wound motor, which greatly reduces insulation failure of the series-wound motor when manufacturing a cooling system. Will be able to do it.

In the embodiment, the insulating material 5 is formed by folding the plate-shaped polyester film 6 in two at the fold line 6A, and starting from the valley fold line 6B to the ridge line 6A.
The double portion on the side is the insulating portion 5B, and the opposite side is the holding portion 5A. However, the present invention is not limited to this. The present invention is also effective when the L-shaped insulating material is configured as an insulating portion and the opposite side as a holding portion.

In the embodiment, the insulating paper is described as the polyester film 6. However, the insulating paper is not limited to this, and may be made of PET,
A plate-like film such as PEN or synthetic insulating paper may be used.

[0052]

As described in detail above, according to the present invention, the series-wound motor is provided with an insulating material located between the coils wound around the adjacent teeth, and the insulating material is provided by the coil. Since the holding portion to be held is provided, for example, as in claim 2, the insulating material is made of a plate-like insulating paper, and the holding portion is formed by bending the insulating paper.
For example, it is possible to hold the insulating paper between both coils simply by inserting the holding portion between the coils located behind the adjacent teeth. Thereby, it is possible to reliably prevent the inconvenience that the insulating paper is shifted toward the inner diameter side of the stator. Therefore, it is possible to reliably prevent the insulating paper from protruding toward the inner diameter side of the stator simply by inserting the holding portion between the two coils, and to surely insulate the coils from each other. .

According to the third aspect of the present invention, in addition to the above, since the insulating material has a predetermined folded shape and the coil lead wire is sandwiched in the folded portion, the coil and the insulating material are separated from each other. Are fixed between the coils, so that the inconvenience of the insulating material falling out from between the coils and the inconvenience of the insulating material protruding toward the inner diameter side of the stator can be prevented. Thereby, for example, it is possible to greatly reduce the labor for inserting the lead wire into the tube as in the conventional case. Therefore, for example, it is possible to reliably fix the coil lead wire between both coils without inserting a tube into the coil lead wire, which is likely to be damaged in the operation of manufacturing a series-wound motor, for example. It is possible to provide a series-wound electric motor which can be greatly improved and has high reliability.

In particular, it is possible to insulate other coil portions without inserting a tube into the lead wire of the coil, which is apt to be damaged in the operation of manufacturing a series-wound motor as in the prior art, without insulating the tube. Thus, it is possible to provide a series-wound motor having a reduced number of parts, improved productivity, and high reliability.

According to the fourth aspect of the present invention, in addition to the first, second, or third aspect, the insulating material has a covering portion for covering the coil end. It is possible to reliably prevent the coil from being damaged due to rubbing. Thereby, the workability at the time of manufacturing the series-wound electric motor can be greatly improved. Therefore, it is possible to provide a series-wound electric motor with high reliability for insulation.

According to the fifth aspect of the present invention, in addition to the first, second, third or fourth aspect, the insulating material holding portion may be provided on one or both coil end sides. The insulating material can be easily inserted between the coils simply by pressing the holding portion between the coils from the narrow side. This improves the workability of inserting the insulating material between the coils,
Thus, the productivity of the series-wound electric motor can be greatly improved.

According to the sixth aspect of the present invention, the coil is wound directly around the teeth of the stator, and the annular insulating material surrounding the coil wound around the teeth is provided. Therefore, the entire circumference of the coil can be protected by the insulating material. This makes it possible to insulate the entire circumference of the coil. Accordingly, the insulation around the entire circumference of the coil is sufficient only by inserting an annular insulating material, so that the productivity can be greatly improved.

According to the seventh aspect of the present invention, since the opening is formed in the surface of the insulating material on the coil end side, heat generated inside the insulating material can be radiated from the opening. As a result, the heat generation of the coil can be suppressed low, so that the reliability of the series-wound electric motor can be greatly improved. Therefore, it is possible to prevent the coil from being damaged by heat.

According to the invention of claim 8, according to claim 6,
Alternatively, in addition to the seventh aspect, since the insulating material is held by the binding yarn that binds the coil end, it is possible to prevent a problem that the insulating material protrudes toward the inner diameter side of the stator. Therefore, it is possible to reliably prevent the insulating material from protruding from the coil toward the inner diameter side of the stator, and it is possible to greatly improve the reliability of the series-wound electric motor.

Further, according to the ninth aspect of the present invention, in addition to the first, second, third, fourth, fifth, sixth, seventh or eighth aspects of the present invention, Since insulation is provided for the coil where stress sometimes occurs,
It is possible to reliably protect the portion where the coil is damaged by the stress with the insulating material. As a result, it is only necessary to provide the insulating material only at the coil portion where stress occurs during production, so that it is not necessary to insert the insulating material between the coils wound around the adjacent teeth, thereby greatly increasing productivity. Can be improved. Therefore, it is possible to provide a series-wound electric motor with high reliability for insulation with a small number of insulating materials.

Further, according to the tenth aspect of the present invention, the refrigerant compressor includes the first, second, third, fourth, fifth, sixth, seventh, and seventh aspects. Since the case is provided with the series-wound electric motor according to the eighth or ninth aspect and the compression unit driven by the series-wound electric motor, insulation failure of the series-wound electric motor during manufacture of the refrigerant compressor is greatly reduced. It becomes possible. Therefore, it is possible to provide a refrigerant compressor having high reliability for insulation.

According to the eleventh aspect of the present invention, since the cooling device is provided with the refrigeration cycle constituted by the refrigerant compressor of the tenth aspect, the insulation failure of the series-wound motor at the time of manufacturing the cooling device. Can be greatly reduced. Therefore, it is possible to provide a cooling device having high reliability for insulation.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator in which an insulating material is inserted between coils of a series-wound motor of the present invention.

FIG. 2 is a perspective view of the insulating material of the present invention.

FIG. 3 is a view showing a mountain fold line and a valley fold line of the polyester film constituting the insulating material of FIG. 2;

FIG. 4 is a front view of the insulating material after bending the polyester film of FIG. 3;

FIG. 5 is a plan view of the insulating material of FIG. 4;

FIG. 6 is a side view of the insulating material of FIG. 4;

FIG. 7 is a longitudinal plan view of the stator when insulating paper is inserted between the coil and the stator.

FIG. 8 is a vertical sectional plan view of the stator showing a state in which an insulating material is inserted between coils located on the inner diameter side of the stator from the stator side.

FIG. 9 is a vertical cross-sectional plan view of the stator showing a state in which the lead wire of the coil is sandwiched in the folded portion of the polyester film.

FIG. 10 is a perspective view of another insulating material of the present invention.

FIG. 11 is a view showing a mountain fold line and a valley fold line of the polyester film constituting the insulating material of FIG. 10;

FIG. 12 is a front view of the insulating material after the polyester film of FIG. 11 is bent.

FIG. 13 is a plan view of the insulating material of FIG.

FIG. 14 is a side view of the insulating material of FIG.

FIG. 15 is a perspective view of another insulating material of the present invention.

FIG. 16 is a view showing a mountain fold line and a valley fold line of the polyester film constituting the insulating material of FIG.

FIG. 17 is a front view of the insulating material after the polyester film of FIG. 16 is bent.

FIG. 18 is a plan view of the insulating material of FIG.

FIG. 19 is a side view of the insulating material of FIG. 17;

20 is a plan view of the stator when the insulating material of FIG. 15 is inserted between the coil and the stator.

FIG. 21 is a plan view of the stator showing a state in which a coil wound around a tooth portion is surrounded by an annular insulating material.

FIG. 22 is a front view of a polyester film constituting the annular insulating material of FIG. 21.

FIG. 23 is a view showing a state where openings are provided in the polyester film of FIG. 22.

FIG. 24 is a front view of the annular insulating material of FIG. 21.

FIG. 25 is a side view of the annular insulating material of FIG. 24;

FIG. 26 is a plan view of the annular insulating material of FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Tooth part 4 Coil 4A Leader wire 5 Insulating material 5A Holding part 5B Insulating part 6 Polyester film 6A Mountain fold line 6B Valley fold line

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Takezawa 2-5-1-5, Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Toshito Yanajima 2 Keihanhondori, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. F-term (reference) 5H603 AA09 BB01 BB05 BB09 BB10 BB12 CA01 CA05 CB02 CB03 CB17 CB18 CB23 CB26 CC11 CD01 CD04 CD21 CE01 EE02 EE12 EE13 FA02 FA26 5H604 AA08 BB01 CC08 DA16 DB26 PB02 PB03 5H615 AA01 BB01 BB05 BB07 BB14 PP01 PP13 PP14 QQ02 QQ19 QQ28 RR02 SS11 TT36

Claims (11)

[Claims] 1. A series-winding motor in which a coil is wound directly around teeth of a stator, wherein an insulating material is provided between the coils wound around the adjacent teeth, respectively. A series-wound electric motor, comprising: a holding portion that is held by the coil. 2. The series-wound electric motor according to claim 1, wherein the insulating material is made of plate-shaped insulating paper, and the holding portion is formed by bending the insulating paper. 3. The series-wound electric motor according to claim 1, wherein the insulating material has a predetermined folded shape and a lead wire of the coil is sandwiched in the folded portion. 4. The apparatus according to claim 1, wherein said insulating material includes a covering portion covering a coil end.
Or a series-wound electric motor according to claim 3. 5. The holding portion of the insulating material has a shape that gradually becomes narrower toward one or both coil end sides.
A series-wound electric motor according to claim 3. 6. A series-wound electric motor in which a coil is wound directly around teeth of a stator, wherein an annular insulating material surrounding the coil wound around the teeth is provided. Electric motor. 7. The series-wound electric motor according to claim 6, wherein an opening is formed in a surface of the insulating material on a coil end side. 8. The series-wound electric motor according to claim 6, wherein the insulating material is held by a binding yarn that binds a coil end. 9. The method according to claim 1, wherein said insulating material is provided corresponding to a coil in which stress occurs during production.
Claim 2, Claim 3, Claim 4, Claim 5, Claim 6,
A series-wound electric motor according to claim 7. 10. The series-wound electric motor according to claim 1, 2, 3, 3, 4, 5, 6, 7, 8, or 9, and the series-wound motor. A refrigerant compressor comprising a compression section driven by an electric motor in a case. 11. A cooling device comprising a refrigeration cycle constituted by the refrigerant compressor according to claim 10.