JP2000060047A - Stator coil of dynamoelectric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stator coil in which the decline of the insulation performance of a ground insulation layer is suppressed by a method, wherein an electrical connection between a semiconducting tape on the ground insulation layer and the semiconducting tape of a composite tape and an electrical connection between the semiconducting tape on the ground insulation layer and a stator core are secured to avoid partial discharge on the surface of the ground insulation layer and on the surface of the composite tape. SOLUTION: A semiconducting tape 10 is wound on a ground insulation layer 4, which is formed so as to cover the circumference of coil conductors 3 with overlaps. A composite tape 11 which is composed of a semiconductive tape 12 and an insulating nonadhesive layer 14, whose width is a half of the width of the semiconducing tape 12 and which is bonded to one side of the semiconducting tape 12 with insulating bonding material 13 therebetween, is wound on the semiconducting tape 10 with overlaps so as to have the nonadhesive layer 14 brought into contact with the semiconducting tape 10, and furthermore, have spacings in the width direction of the nonadhesive layer 14. In addition, conductive forcibly connected pieces 15 are wrapped up in the composite tape 11, so as to have their one side ends brought into contact with the semiconductive tape 10, and moreover have their other side ends extended out to the outer circumference side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator coil of a rotating electric machine manufactured by a full impregnation method in which a stator coil is housed in a stator core slot and a resin is impregnated and cured.

[0002]

2. Description of the Related Art One of the methods for manufacturing a stator coil of a high-voltage rotating electric machine is to install a stator coil, which is provided with a mica tape wound around a coil conductor and covered with a ground insulating layer, in a stator core slot and wire the wire. After that, there is a total impregnation method in which this is impregnated with a thermosetting resin and cured. In the full impregnation method,
Since the stator coil and the stator core are firmly fixed by the impregnated and hardened thermosetting resin, the mechanical rigidity of the entire winding is high and the heat between the stator coil and the stator core is high. The resistance is reduced, and it is possible to efficiently suppress a rise in the temperature of the stator coil due to heat generated in the coil conductor during operation. Furthermore, if the production is performed by the full impregnation method, there is an advantage that the impregnation and curing steps can be performed only once, and the production process can be shortened.

[0003] However, the current density of the coil conductor of the stator coil tends to increase due to the miniaturization and large capacity of the rotating electric machine manufactured by the full impregnation method, and accordingly, the calorific value of the coil conductor also increases. Generally, during operation of a rotating electric machine, heat generated in a coil conductor becomes driving force, and shear stress due to a difference in thermal expansion coefficient between a stator coil surface and a stator core slot increases, so that the stator coil There is a disadvantage that defects such as peeling and cracks occur in the ground insulating layer.

[0004] As a remedy, the present applicant winds a surface corona prevention layer on a ground insulating layer wound around the outer periphery of a coil conductor, and alleviates the shear stress generated in the ground insulating layer by the surface corona layer. PCT / JP97 / 04668 to improve the stator coil structure to prevent peeling and cracking in the ground insulating layer.
(Filing date: 1997/12/18). The surface corona layer in this improvement measure is a semiconductive tape and a composite tape formed by providing a fluorine-based conductive or insulating non-adhesive layer on one surface of the semiconductive tape, and one of the semiconductive tape and the composite tape. The semi-conductive tape surface is in contact with the ground insulating layer, and the non-adhesive layer of the composite tape is positioned between the semi-conductive tape and the semi-conductive tape of the composite tape so that a gap is provided in the width direction of the non-adhesive layer. Formed by turning,
The purpose of the present invention is to maintain the releasability between the ground insulating layer and the stator core slot, and to provide long-term excellent characteristics.

FIG. 12 is a perspective view showing a portion around a slot outlet of a high-voltage rotating machine incorporating a stator coil as an improvement. 12, a stator coil 2 includes a coil conductor 3, a ground insulating layer 4 wound around the outer periphery of the coil conductor 3 for insulation, and a semiconductive tape wound around the outer periphery of the ground insulating layer 4. And a surface corona prevention layer 9 comprising a composite tape 11. The ground insulating layer 4 is formed by winding a mica tape around the outer periphery of the coil conductor 3 and can be impregnated with a resin. The stator coil 2 is incorporated into a slot 8 provided in the stator core 1 with an intermediate filler 7 interposed therebetween as an upper coil 5a and a lower coil 5b, and after being connected, a thermosetting resin (FIG. (Not shown) is impregnated and hardened to be integrated with the stator core 1. The stator coil 2 is prevented from protruding from the slot 8 by the wedge 6.

Here, the structure of the stator coil 2 will be described with reference to FIG. First, the composite tape 11
The non-adhesive layer 14 made of a fluorine-based tape is a semiconductive tape 1
2 is attached to one side using an adhesive 13. A ground insulating layer 4 formed by winding a mica tape is wound around the outer periphery of the coil conductor 3. And
A semiconductive tape 10 is wound around the outer periphery of the ground insulating layer 4. Further, the composite tape 11 is wound around the outer periphery of the semiconductive tape 10 so that the non-adhesive layer 14 contacts the semiconductive tape 10. The semi-conductive tape 10 and the composite tape 11 constitute the surface corona prevention layer 9. In FIG. 13, the ground insulating layer 4, the semiconductive tape 10, the composite tape 11, and the stator core 1 are drawn away from each other for easy understanding of the structure. Close to each other.

[0007] In the rotating electric machine incorporating the stator coil 2 configured as described above, the adhesive strength between the members, between the non-adhesive layer 14 made of a fluorine-based material and the thermosetting resin, or The adhesive strength between the non-adhesive layer 14 and the semiconductive tape 10 is weak. Therefore, when a shear stress caused by a difference in thermal expansion coefficient is generated between the stator coil surface and the stator core, slip occurs in the non-adhesive layer 14 and the ground insulating layer 4 and the stator core 1 The releasability between them is ensured. As a result, the shearing stress acting on the ground insulating layer 4 is reduced, the occurrence of peeling and cracking in the ground insulating layer 4 is suppressed, and excellent characteristics are obtained over a long period of time.

[0008]

In the stator coil 2 as an improvement, the composite tape 11 is made of a semiconductive tape 12.
Is formed by adhering a non-adhesive layer 14 made of a fluorine-based tape or the like using an adhesive 13, so that the adhesive 13 is insulative or the non-adhesive 14 is The semi-conductive tape 10 wound on the surface of the ground insulating layer 4 and the semi-conductive tape 12 of the composite tape 11 electrically connected to the stator core 1 are not electrically connected to each other. Therefore, there is a problem that a partial discharge occurs and the ground insulating layer 4 is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When incorporated in a rotating electric machine, the present invention relates to a semiconductive tape-composite tape wound on an insulating layer to ground. A strong electrical connection between the semiconductive tape and the stator core, preventing partial discharge on the surface of the ground insulation layer and the composite tape surface, and releasing the mold between the ground insulation layer and the stator core slot It is an object of the present invention to provide a stator coil capable of producing a rotating electric machine having high reliability and excellent characteristics over a long period of time without deteriorating the insulation performance of a ground insulating layer while maintaining the performance.

[0010]

SUMMARY OF THE INVENTION A stator coil of a rotating electric machine according to the present invention is provided with a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a ground insulating layer disposed to cover the ground insulating layer. Rotation integrated with the stator core by a thermosetting impregnating resin together with the stator core and hardened by the impregnated resin together with the stator core. In the stator coil of the electric machine, the surface corona prevention layer is formed by winding a first semiconductive tape around the outer periphery of the ground insulating layer.
A composite tape comprising a layer and a non-adhesive layer having a width smaller than that of the second semiconductive tape provided on one surface of the second semi-conductive tape has the non-adhesive layer on the outer periphery of the first layer, The first semiconductive tape is in contact with the second semiconductive tape, and is configured to have a laminated structure with a second layer that is overlapped and wound so as to provide a gap in the width direction of the non-adhesive layer. When one end is in contact with the first semiconductive tape and the other end is wound around the second layer so as to extend to the outer periphery, the second half is formed when integrated with the stator core. The conductive tape and the forcible connection piece are in contact with an inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the stator core are electrically at the same potential. Is what is being done.

Further, one end of the forcible connection piece is wound around the first layer.

[0012] A coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona preventing layer disposed to cover the ground insulating layer are provided in a stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A composite tape having a non-adhesive layer narrower than the tape on one side of the semi-conductive tape is provided on the outer periphery of the ground insulating layer, with the non-adhesive layer facing the outer peripheral side. A first layer in contact with the ground insulating layer and wound so as to provide a gap in the width direction of the non-adhesive layer, and a second layer formed by winding a second semiconductive tape around the outer periphery of the first layer. It has a laminated structure with two layers Further, one end of the conductive forcible connection piece is rolled into the first layer so as to extend the other end to the outer peripheral side, and the other end of the extended end contacts the second semiconductive tape, When integrated with the stator core, the second
The semiconductive tape and the forcible connection piece are in contact with the inner wall surface of the stator core slot, so that the first semiconductive tape, the second semiconductive tape, and the stator core have the same electric potential. Is configured.

The other end of the forcible connection piece is wound around the second layer.

Further, the forcible connection piece is made of a metal tape.

Further, the forcible connection piece is made of a semiconductive woven or nonwoven fabric formed by impregnating a glass or polyester substrate with a resin to which conductive particles are added.

Further, the forcible connection piece converts the conductive particles into PTF.
It consists of a semiconductive tape made by adding it to a fluororesin such as E, PFA, ETFE or PVDF.

Further, at least a part of the outer peripheral surface of the forcible connection piece is subjected to an adhesive treatment.

The non-adhesive layer is conductive.

Further, the non-adhesive layer is insulative.

The coil conductor, a ground insulating layer disposed so as to cover the periphery of the coil conductor, and a surface corona preventing layer disposed so as to cover the ground insulating layer, are accommodated in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A first semiconductive tape wound around the outer periphery of the ground insulating layer;
A composite tape comprising a layer and a conductive non-adhesive layer having a width exceeding one half of the width of the tape and smaller than the width of the tape on one side of the second semiconductive tape in the longitudinal direction of the tape. Is wrapped around the outer periphery of the first layer with the non-adhesive layer facing the inner periphery, contacting the non-adhesive layer with the first semiconductive tape, and overlapping a part of the non-adhesive layer in the width direction. When integrated with the stator core, the second semiconductive tape is in contact with the inner wall surface of the stator core slot, and the first semiconductive tape is integrated with the stator core. The conductive tape, the second semiconductive tape, and the stator core are configured to be electrically at the same potential.

The coil conductor, a ground insulating layer disposed so as to cover the periphery of the coil conductor, and a surface corona preventing layer disposed so as to cover the ground insulating layer, are accommodated in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is On one side of one semiconductive tape over half the width of this tape, and
A composite tape, in which a conductive non-adhesive layer having a width smaller than the width of the tape is provided in the length direction of the tape, is provided on the outer periphery of the ground insulating layer, with the non-adhesive layer facing the outer periphery, and the first half. A first layer formed by winding a conductive tape in contact with the ground insulating layer and overlapping a part of the non-adhesive layer in the width direction, and a second semiconductive tape are wound around the outer periphery of the first layer. The second semiconductive tape is configured to have a laminated structure with a second layer that is turned, and when integrated with the stator core, the second semiconductive tape contacts the inner wall surface of the stator core slot, and The semiconductive tape, the second semiconductive tape, and the stator core are configured to be electrically at the same potential.

Further, the non-adhesive layer is provided on one side of the semiconductive tape of the composite tape at a position except for both ends in the width direction of the semiconductive tape.

The coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer are provided in a stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A first semiconductive tape wound around the outer periphery of the ground insulating layer;
Layer and a conductive non-adhesive layer having a width smaller than half of the tape width on one surface of the second semiconductive tape, and the bonding area of the non-adhesive layer is set to be not more than half of the total area of the non-adhesive layer on the bonding side. A non-adhesive layer is attached to the first semiconductive tape on the outer periphery of the first layer with the non-adhesive layer facing the inner peripheral side; A second layer that is wrapped so as to provide an interval in the width direction of the layer.
The second semiconductive tape contacts the inner wall surface of the stator core slot when integrated with the stator core, and the first semiconductive tape, the first semiconductive tape, The second semiconductive tape and the stator core are configured to be electrically at the same potential.

Further, the coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A conductive non-adhesive layer having a width smaller than half of the tape width is provided on one side of the semiconductive tape, and an insulating layer is formed so that the joint area of the non-adhesive layer is less than half of the total area of the joint side of the non-adhesive layer. A composite tape affixed with an adhesive material has the non-adhesive layer facing the outer periphery of the ground insulating layer, the first semiconductive tape is in contact with the ground insulating layer, and the width direction of the non-adhesive layer is Space A first layer formed by lap winding, the second
Is formed in a laminated structure with a second layer wound around the outer periphery of the first layer, and when integrated with the stator core, the second semiconductive tape is fixed to the second core. The first semiconductive tape, the second semiconductive tape, and the stator core are configured so as to be in contact with the inner wall surface of the core core slot and have the same electric potential.

The pressure-sensitive adhesive is formed on one surface of the semiconductive tape of the composite tape in the form of vertical stripes, horizontal stripes, or spots.

Further, a plurality of depressions are formed on the surface of the semiconductive tape of the composite tape on the non-adhesive layer side, and the adhesive material is filled in the depressions.

The coil conductor, a ground insulating layer disposed so as to cover the periphery of the coil conductor, and a surface corona prevention layer disposed so as to cover the ground insulating layer, are accommodated in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A first semiconductive tape wound around the outer periphery of the ground insulating layer;
And a composite tape formed by attaching a conductive non-adhesive layer having a width smaller than half the width of the tape to one surface of the second semi-conductive tape with a conductive adhesive material. The non-adhesive layer is in contact with the first semiconductive tape, with the layer facing the inner peripheral side, and has a laminated structure with a second layer that is overlapped and wound so as to provide an interval in the width direction of the non-adhesive layer. When configured and integrated with the stator core, the second semiconductive tape contacts the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape and The stator core is configured to be electrically at the same potential.

Also, the coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A composite tape formed by attaching a conductive non-adhesive layer having a width smaller than half of the tape width to one side of the semiconductive tape with a conductive adhesive material is provided on the outer periphery of the ground insulating layer. The first semiconductive tape is in contact with the ground insulating layer, and the first semiconductive tape is overlapped and wound so as to provide an interval in the width direction of the non-adhesive layer. Wound around the outer periphery of the first layer It is provided in a multilayer structure of the second layer formed by, when integrated with the stator core, the second
Is in contact with the inner wall surface of the stator core slot so that the first semiconductive tape, the second semiconductive tape, and the stator core have the same electric potential. Things.

The pressure-sensitive adhesive is thermosetting.

The pressure-sensitive adhesive is thermoplastic.

The bonding surface of the non-adhesive layer has been subjected to an adhesive treatment.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. FIG. 1 is a perspective view showing a stator of a high-voltage rotating electric machine incorporating a stator coil according to Embodiment 1 of the present invention, and FIG. 2 is incorporating a stator coil according to Embodiment 1 of the present invention. It is sectional drawing which shows the inside of the stator core of a high voltage | pressure rotary electric machine. In FIG. 1, a stator coil 30 includes a coil conductor 3, a ground insulating layer 4 wound around the outer periphery of the coil conductor 3 for insulation, and a first coil wound around the outer periphery of the ground insulating layer 4. A surface corona prevention layer 31 composed of a semiconductive tape 10 as a semiconductive tape and a composite tape 11,
And a forced connection piece 15 provided to be wound around the surface corona prevention layer 31. This stator coil 30
Are installed in the slots 8 provided in the stator core 1 with the intermediate filler 7 interposed therebetween as the upper coil 30a and the lower coil 30b, connected, and then impregnated with a thermosetting resin (not shown). It is cured and integrated with the stator core 1. The stator coil 30 is prevented from protruding from the slot 8 by the wedge 6. Here, the ground insulating layer 4 is formed by winding a plurality of mica tapes in which a glass cloth as a reinforcing material is laminated on a mica sheet made of, for example, mica sheets around the outer periphery of the coil conductor 3 and can be impregnated with a resin. In the composite tape 11, an insulating non-adhesive layer 14 having a half width of the semiconductive tape 12 as a second semiconductive tape is attached to one surface of the semiconductive tape 12 using an insulating adhesive material 13. It is configured. The non-adhesive layer 14 is made of PTFE (polytetrafluoroethylene), PFA (tetrafluoroethylene-perfluoroalkylvinylethylene copolymer), ETFE (ethylene-tetrafluoroethylene copolymer), PVDF (polyvinylidene fluoride), or the like. Is used. Also,
The semiconductive tapes 10 and 12 have a resistance value larger than that of metal,
A woven or nonwoven fabric that is smaller than an insulator and is made of a glass or polyester substrate impregnated with a resin to which conductive particles such as carbon are added is used. In addition, forced connection piece 1
5 is a metal tape of copper, aluminum, gold or the like.

Next, a method of manufacturing the stator coil 30 will be described with reference to FIG. First, the mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. Then, the semiconductive tape 10 is wrapped around the outer periphery of the ground insulating layer 4 in an overlapping manner,
The first layer of the surface corona prevention layer 31 is formed. further,
The composite tape 11 is wound around the outer periphery of the semi-conductive tape 10 in a 重 ね lap so that the non-adhesive layer 14 is in contact with the semi-conductive tape 10 and a space is provided in the width direction of the non-adhesive layer 14. Then, the second layer of the surface corona prevention layer 31 is formed. At this time, the forcible connection piece 15 has one end side of the composite tape 1.
1 and the semiconductive tape 10, the intermediate portion is sandwiched between the composite tapes 11, and the other end is extended so as to cover the semiconductive tape 12 of the composite tape 11.
Get caught in one. Therefore, the forcible connection piece 15 is electrically connected to the semiconductive tapes 10 and 12 and disposed so that the other end is exposed to the outside, and the stator coil 30 is manufactured. The stator coil 30 manufactured in this manner is housed in the slot 8 and connected, then impregnated with a thermosetting resin and cured to be integrated with the stator core 1. At this time, since the other end of the forced connection piece 15 is exposed to the outside from the composite tape 11, an electrical connection between the forced connection piece 15 and the stator core 1 is ensured.

In FIG. 2, the ground insulating layer 4, the semiconductive tape 10, and the composite tape 1 are shown for easy understanding of the structure.
1. Although a part of the forced connection piece 15 and the stator core 1 are drawn away from each other, they are actually close to each other. The same applies to other embodiments.

In the rotating electric machine incorporating the stator coil 30 constructed as described above, the semiconductive tape 10 is wound around the outer periphery of the ground insulating layer 4, and the semiconductive tape 10 and the composite tape 11, Further, the stator core 1 is electrically connected to the same potential. Therefore, the non-adhesive layer 1
4 is insulating, or the non-adhesive layer 14 is
Is not affected by the insulating pressure-sensitive adhesive 13 used when bonding to the surface, prevents partial discharge on the surface of the ground insulating layer 4, does not lower the insulation performance of the ground insulating layer 4, has high reliability, A rotating electric machine having excellent characteristics can be obtained.

It is not always necessary to insert the forcible connection piece 15 over the entire length of the stator coil 30. Depending on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10, 12, an increase in tan δ is suppressed. From the viewpoint of doing so, it may be provided every 1 to 2 m. In the first embodiment, the semiconductive tape 10 is wound on the ground insulating layer 4, and the composite tape 11 is wound thereon such that the non-adhesive layer 14 is on the semiconductive tape 10 side. However, the same effect can be obtained in a structure in which the composite tape 11 is wound on the ground insulating layer 4 such that the semiconductive tape 12 is on the ground insulating layer 4 side, and the semiconductive tape 10 is wound thereon. can get. Also,
In the first embodiment, since the insulating non-adhesive layer 14 is used, the material of the non-adhesive layer 14 is inexpensive, and the cost is reduced. Although the non-adhesive layer 14 has an insulating property, the non-adhesive layer may have a conductive property. In this case, a contact area with the forcible connection piece 15 is increased, so that more reliable electrical connection is achieved. can get. In the first embodiment, when the composite tape 11 is wound, the forced connection piece 15 is wound. However, the forced connection piece 15 is further wound around the semiconductive tape 10 on the ground insulating layer 4 side. You may. In this case, the electrical connection between the semiconductive tape 10 and the composite tape 11, and furthermore, the stator core 1 can be further strengthened. Also, semiconductive tape 10,
The surface resistance of the forcing member 12 and the forcible connection piece 15 is desirably in the range of 10 ² to 10 ⁵ Ω from the viewpoint of tan δ and eddy current suppression.

In the first embodiment, a metal tape is used as the forcible connection piece 15. However, as the forcible connection piece 15, a glass or polyester base material is impregnated with a resin to which conductive particles such as carbon are added. A semi-conductive woven fabric or non-woven fabric formed by the above method can also be used. In this case, since the forced connection piece does not impair the impregnating property of the thermosetting resin, the thermosetting resin can be impregnated between the stator core 1 and the stator coil 30 at a high density, and excellent mechanical properties can be obtained. Strength is obtained. In addition, PTFE,
A conductive non-adhesive tape formed by mixing conductive particles such as carbon with a fluororesin such as PFA, ETFE or PVDF may be used. In this case, the forcible connection piece is not caught during the stress relaxation operation, and the releasability between the ground insulating layer 4 and the stator core slot 8 is reliably maintained. When a non-adhesive tape is used for the forcible connection piece 15,
If the surface is roughened by corona treatment, alkali treatment, or adhesive treatment such as sanding with sandpaper, the surface roughened during impregnation and curing of the thermosetting resin Is fixed by the thermosetting resin, the stress relaxation structure works during operation, and even if the non-adhesive layer 14 and the semiconductive tape 10 immediately above the ground insulating layer 4 are separated from each other, the forced connection piece does not come off. The same can be said for the case where an adhesive is provided on a part of the outer peripheral surface of the forced connection piece. When an adhesive is provided on the first semiconductive layer side,
Since the forcible connection piece can be fixed to the first semiconductive layer side when the forcible connection piece is involved, manufacturing workability is excellent.

Embodiment 2 FIG. 3 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 2 of the present invention, and FIG. 4 is a stator according to Embodiment 2 of the present invention. It is sectional drawing which shows the inside of the stator core of the high voltage | pressure rotary electric machine which incorporated the coil.

In the second embodiment, as shown in FIG. 3, the composite tape 11A
A non-adhesive layer 16 having a width of about half is adhered to one surface of the semiconductive tape 12 along the edge of the semiconductive tape 12 using an adhesive 13. Then, the non-adhesive layer 16
Uses a conductive tape formed by mixing conductive particles such as carbon with a fluororesin such as PTFE, PFA, ETFE or PVDF.

Next, a method of manufacturing the stator coil according to the second embodiment will be described with reference to FIG. First, the mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. Then, the semiconductive tape 10 is wound around the outer periphery of the ground insulating layer 4 to form the first layer of the surface corona prevention layer 31A. Further, the outer periphery of the semi-conductive tape 10 is attached to the composite tape 11A such that the non-adhesive layer 16 is in contact with the semi-conductive tape 10 and a part of the non-adhesive layer 16 in the width direction is overlapped.
The second winding of the surface corona prevention layer 31A
The layers are formed, and the stator coil 30A is manufactured. The stator coil 30 </ b> A manufactured in this way is housed in the slot 8, connected, then impregnated with a thermosetting resin and cured to be integrated with the stator core 1.

The thus configured stator coil 30A
In this case, the conductive non-adhesive layer 16 has a width of about 幅 of the width of the semiconductive tape 12, and the composite tape 11 </ b> A
6 is wound so as to be in contact with the semiconductive tape 10 and partially overlap the non-adhesive layer 16 in the width direction, so that the non-adhesive layer 16 is wound just before the composite tape 11A. The semiconductive tape 10 and the semiconductive tape 12 of the composite tape 11 </ b> A are electrically connected via the non-adhesive layer 16. By incorporating the stator coil 30A into the slot 8 of the stator core 1, the semiconductive tape 12 of the composite tape 11A comes into contact with the inner wall surface of the slot 8 and is wound around the outer periphery of the ground insulating layer 4. And the composite tape 11A and further up to the stator core 1 are electrically connected to have the same potential. Therefore, there is no influence of the adhesive 13 used when bonding the non-adhesive layer 16 to the semiconductive tape 12, preventing partial discharge on the surface of the ground insulating layer 4, without lowering the insulation performance of the ground insulating layer 4, A rotating electric machine having high reliability and excellent characteristics over a long period of time can be manufactured. Further, compared to the first embodiment, since the forced connection piece 15 is not used, the manufacturing workability of the stator coil 30A is excellent.

Here, the ratio of the non-adhesive layer 16 occupying the surface of the semiconductive tape 12 of the composite tape 11A is not limited to ／ of the width of the semiconductive tape 12, but is １ ／ of the width of the semiconductive tape 12. And the width is smaller than the width of the semiconductive tape 12. That is, when the composite tape 11 </ b> A is wrapped in half, the non-adhesive layer 16 is wound immediately before the composite tape 1 </ b> A.
In order to contact the semiconductive tape 12 of FIG.
6 must be larger than half the width of the semiconductive tape 12. Further, when the non-adhesive layer 16 is provided on the entire surface of the semiconductive tape 12, when the thermosetting resin is impregnated to integrate the stator coil 30 </ b> A into the stator core 1, the non-adhesive layer 16 is Since it acts to prevent the thermosetting resin from penetrating into the semiconductive tape 10 and the ground insulating layer 4, the width of the non-adhesive layer 16 needs to be smaller than the width of the semiconductive tape 12. The composite tape 1 is placed on the ground insulating layer 4 such that the surface of the semiconductive tape 12 is on the ground insulating layer 4 side.
A similar effect can be obtained in a structure in which the semiconductive tape 10 is wound on the wound 1A. Further, this conductive structure may be installed on the entire surface inside the stator core 1 or may be installed partially. However, when installing partially,
Although depending on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10 and 12, from the viewpoint of suppressing an increase in tan δ,
It may be provided at every m. The semiconductive tapes 10, 1
2 and the surface resistance of the non-adhesive layer 16 are preferably in the range of 10 ² to 10 ⁵ Ω from the viewpoint of tan δ and eddy current suppression.

Embodiment 3 FIG. 5 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 3 of the present invention, and FIG. 6 is a stator according to Embodiment 3 of the present invention. It is sectional drawing which shows the inside of the stator iron core of the high voltage | pressure rotary electric machine which incorporated the coil.

In the third embodiment, as shown in FIG. 5, the composite tape 11B has a non-adhesive layer 16 on one side of the semiconductive tape 12 and on both sides of the semiconductive tape 12, 1/5, 2 It is configured to have a width of about / 5 and to be adhered using the adhesive 13.

Next, a method of manufacturing the stator coil according to the third embodiment will be described with reference to FIG. First, the mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. Then, the semiconductive tape 10 is wound around the outer periphery of the ground insulating layer 4 to form the first layer of the surface corona prevention layer 31B. Furthermore, the composite tape 11B is attached to the outer periphery of the semi-conductive tape 10 such that the non-adhesive layer 16 contacts the semi-conductive tape 10 and overlaps a part of the non-adhesive layer 16 in the width direction.
The second winding of the surface corona prevention layer 31B
The layers are formed, and the stator coil 30B is manufactured. The stator coil 30B manufactured in this manner is housed in the slot 8, connected, and then impregnated with a thermosetting resin and cured to be integrated with the stator core 1.

The thus configured stator coil 30B
In the layer of the wound composite tape 11B, since the non-adhesive layer 16 does not overlap, that is, the non-adhesive layer 16 has a cut, when impregnating the thermosetting resin, the thermosetting resin is As shown by arrows in FIG. 6, the permeation is further improved. Further, a conductive non-adhesive layer 16 is provided on the semi-conductive tape 12 with a width of about 1/5 and 2/5 on both sides of the semi-conductive tape 12, respectively. To be in contact with the tape 10, and
Since the non-adhesive layer 16 is wound so as to partially overlap the width direction of the non-adhesive layer 16, the non-adhesive layer 16 comes into close contact with the surface of the semi-conductive tape 12 of the composite tape 11B wound immediately before, and the semi-conductive tape 10 and the semiconductive tape 12 of the composite tape 11 </ b> B are electrically connected via the non-adhesive layer 16. And
By incorporating the stator coil 30B into the slot 8 of the stator core 1, the semiconductive tape 12
Is in contact with the inner wall surface of the slot 8, and the semiconductive tape 10 and the composite tape 11B wound around the outer periphery of the ground insulating layer 4 are electrically connected to the stator core 1 to have the same potential. 16 is insulative, and there is no influence of the adhesive 13 used when bonding the non-adhesive layer 16 to the semiconductive tape 12, preventing partial discharge on the surface of the ground insulating layer 4 and insulating the ground insulating layer 4. It is possible to manufacture a rotating electric machine that has high reliability without deteriorating performance and has excellent characteristics over a long period of time. further,
Compared with the first embodiment, since the forced connection piece 15 is not used, the manufacturing workability of the stator coil 30B is excellent.

Here, the ratio of the portion other than the non-adhesive layer 16 on the surface of the semiconductive tape 12 of the composite tape 11B is not limited to 1/5 and 2/5, respectively. It is sufficient that the width does not exceed １ ／ of the width. The same effect can be obtained in a structure in which the composite tape 11B is wound on the ground insulating layer 4 such that the surface of the semiconductive tape 12 is on the ground insulating layer 4 side, and the semiconductive tape 10 is wound thereon. Can be Further, this conductive structure may be installed on the entire surface inside the stator core 1 or may be installed partially. However, in the case of partial installation, depending on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10 and 12, from the viewpoint of suppressing an increase in tan δ, it may be provided at intervals of about 1 to 2 m. In addition,
The surface resistance of the semiconductive tapes 10, 12 and the non-adhesive layer 16 is 10 ² to 10 ⁵ Ω from the viewpoint of tan δ and eddy current suppression.
Is desirable.

Embodiment 4 FIG. 7 is a plan view for explaining a state of application of an adhesive material on a composite tape applied to a stator coil according to Embodiment 4 of the present invention. In the fourth embodiment, as shown in FIG.
C indicates that the adhesive 13 is provided on one surface of the semiconductive tape 12 and on one surface of the semiconductive tape 12 with a width of about の of the non-adhesive layer 16, and the nonadhesive layer 16 is 12 is attached.

Next, a method of manufacturing the stator coil according to the fourth embodiment will be described. The mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. And the semiconductive tape 1
0 is wound around the outer periphery of the ground insulating layer 4 to form the first layer of the surface corona prevention layer. Further, the composite tape 11C contacts the non-adhesive layer 16 to the semiconductive tape 10, and
The non-adhesive layer 16 is wound around the outer periphery of the semiconductive tape 10 in a 重 ね lap so as to provide an interval in the width direction, and the second layer of the surface corona prevention layer is formed, whereby the stator coil is manufactured. . The stator coil manufactured in this manner is housed in the slot 8 and connected, then impregnated with a thermosetting resin and cured to be integrated with the stator core 1.

In the stator coil configured as described above, the pressure-sensitive adhesive 13 has a width of about の of the non-adhesive layer 16, so that the non-adhesive layer 16 and the semi-conductive The tape 12 is in close contact, and the semiconductive tape 10 and the semiconductive tape 12 of the composite tape 11C are electrically connected via the non-adhesive layer 16. By incorporating the stator coil into the slot 8 of the stator core 1, the composite tape 11
The semiconductive tape 12 of C contacts the inner wall surface of the slot 8, and the semiconductive tape 10 and the composite tape 11C wound around the outer periphery of the ground insulating layer 4 and the stator core 1 are electrically connected to each other to have the same potential. Therefore, when the non-adhesive layer 16 is insulative or when the non-adhesive layer 16 is adhered to the semiconductive tape 12, there is no influence of the adhesive 13 used to prevent partial discharge on the surface of the ground insulating layer 4, Without lowering the insulation performance of the ground insulation layer 4,
A rotating electric machine having high reliability and excellent characteristics over a long period of time can be manufactured. Further, since the forced connection piece 15 is not used, the workability of manufacturing the stator coil is excellent. In the composite tape 11C, the non-adhesive layer 16 is
Adhesive 13 for bonding to non-adhesive layer 16 has a width of 1
/ 2, the non-adhesive layer 16 can be adhered to the semiconductive tape 12, and the tension applied when the composite tape 11C is wound around the coil conductor 3 around which the ground insulating layer 4 is wound. What is necessary is just to provide so that the non-adhesion layer 16 does not deviate from 12.

In the fourth embodiment, the adhesive 13
8 is provided along the edge of the semiconductive tape 12, but the adhesive 13 may be provided along the center of the semiconductive tape 12 as shown in FIG. As shown in (b), it may be provided at a location about 1/4 of the width of the semiconductive tape 12. Similarly, the adhesive 13 is formed as shown in FIG.
As shown in (c), (d), and (e) of FIG.
May be provided in the form of vertical stripes, horizontal stripes, or spots in the width direction. Further, this conductive structure may be installed on the entire surface inside the stator core 1 or may be installed partially. However,
In the case of partial installation, although it depends on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10 and 12, from the viewpoint of suppressing an increase in tan δ, it may be provided every 1 to 2 m. Further, the non-adhesive layer 16 used for manufacturing the composite tape 11C is used.
If the adhesive material side surface of the (tape) is roughened by an adhesive treatment such as corona treatment, alkali treatment, or sandpaper, the adhesive material 13 can be more firmly adhered to the non-adhesive layer 16 and the composite tape can be bonded to the coil conductor 3. A deviation due to the tension does not occur when winding 11C, and stable characteristics can be obtained. The composite tape 11 is placed on the ground insulating layer 4 such that the surface of the semiconductive tape 12 is on the ground insulating layer 4 side.
The same effect can be obtained in a structure in which C is wound and the semiconductive tape 10 is wound thereon. The surface resistances of the semiconductive tapes 10 and 12 and the conductive non-adhesive layer 16 are as follows:
From the viewpoint of suppressing eddy current and tan δ, a range of 10 ² to 10 ⁵ Ω is desirable.

Here, when the rotating electric machine is impregnated with the thermosetting resin, pre-drying is performed. Therefore, if a thermosetting adhesive material that is cured at the pre-drying temperature is used as the adhesive material 13, after the semiconductive tape 12 and the non-adhesive layer 16 are bonded with the adhesive material 13 to produce the composite tape 11C. If the heating is performed at a temperature higher than the thermosetting temperature, the semiconductive tape 12 and the non-adhesive layer 1
6 is firmly adhered to the coil conductor 3 around which the ground insulating layer 4 is wound, so that the tension does not occur when the composite tape 11C is wound around the coil conductor 3, and stable characteristics can be obtained. If a high-molecular thermoplastic material having a rework temperature higher than the drying temperature before impregnation and lower than the operating temperature of the rotating electric machine is used as the adhesive material 13, the composite tape 11C
It can be used even when the thermal expansion of the semiconductive tape 12 differs from that of the non-adhesive layer 16. Further, the non-adhesive layer 16 does not come off the semiconductive tape 12 due to the tension applied when the coil is wound around the coil conductor 3. Further, during the operation of the rotating electric machine, the adhesive 13 is softened, and the stress is also reduced between the semiconductive tape 12 and the non-adhesive layer 16, so that a more reliable rotating electric machine can be manufactured.

Embodiment 5 FIG. 9 is a sectional view showing a composite tape applied to a stator coil according to Embodiment 5 of the present invention. In the fifth embodiment, as shown in FIG. 9, the composite tape 11D is such that the adhesive 13 is filled in a plurality of depressions 17 provided on one surface of the semiconductive tape 12, and the non-adhesive layer 16 is Semiconductive tape 12 by material 13
It is configured to be pasted on.

Next, a method of manufacturing the stator coil according to the fifth embodiment will be described. The mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. And the semiconductive tape 1
0 is wound around the outer periphery of the ground insulating layer 4 to form the first layer of the surface corona prevention layer. Furthermore, so that the composite tape 11D contacts the non-adhesive layer 16 with the semiconductive tape 10, and
The non-adhesive layer 16 is wound around the outer periphery of the semiconductive tape 10 in a 重 ね lap so as to provide an interval in the width direction, and the second layer of the surface corona prevention layer is formed, whereby the stator coil is manufactured. . The stator coil manufactured in this manner is housed in the slot 8 and connected, then impregnated with a thermosetting resin and cured to be integrated with the stator core 1.

The stator coil constructed as described above has a structure in which the non-adhesive layer 16 and the semiconductive tape 1
2 and the semiconductive tape 10 and the semiconductive tape 12 of the composite tape 11D are electrically connected via the non-adhesive layer 16. By incorporating the stator coil into the slot 8 of the stator core 1, the semiconductive tape 12 of the composite tape 11 </ b> D contacts the inner wall surface of the slot 8, and the semiconductive tape 10 wound around the outer periphery of the ground insulating layer 4 Composite tape 11
D and further up to the stator core 1 are electrically connected to have the same potential, so that partial discharge on the surface of the ground insulating layer 4 is prevented, the insulation performance of the ground insulating layer 4 is not reduced, and the reliability is high. In addition, it is possible to manufacture a rotating electric machine having excellent characteristics over a long period of time. Further, since the forced connection piece 15 is not used, the workability of manufacturing the stator coil is excellent. Further, the surface of the semiconductive tape 12 is flat because the adhesive 13 is contained in the depression 17, and the surface of the non-adhesive layer 16 is not uneven even when the composite tape is formed. Therefore, the non-adhesive layer 1 during the stress relaxation operation
6 becomes slippery, and the releasability is improved.

Here, this conductive structure may be installed on the entire surface of the stator core 1 or may be installed partially. However, in the case of partial installation, depending on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10 and 12, from the viewpoint of suppressing an increase in tan δ, it may be provided at intervals of about 1 to 2 m. In addition, if the surface of the non-adhesive layer 16 (tape) on the side of the adhesive layer 13 used in the manufacture of the composite tape 11D is roughened by an adhesive treatment such as corona treatment, alkali treatment, or sandpaper polishing, the adhesive material 13 is not adhered. The layer 16 can firmly adhere to the coil conductor 3 around which the ground insulating layer 4 is wound, so that the tension does not occur when the composite tape 11D is wound around the coil conductor 3 and stable characteristics can be obtained. When the rotating electric machine is impregnated with resin, pre-drying is performed. Adhesive 13
If a thermosetting adhesive material that cures at this pre-drying temperature is used, the semiconductive tape 12 and the non-adhesive layer 16 (tape) are adhered with the adhesive material 13 to produce the composite tape 11D, and then the thermosetting temperature is increased. If the above heating is performed, the semiconductive tape 12
And the non-adhesive layer 16 are firmly adhered to each other, so that the tension does not occur when the composite tape 11D is wound around the coil conductor 3, and stable characteristics can be obtained. Also,
If a high-molecular thermoplastic material having a rework temperature higher than the drying temperature before impregnation and lower than the operating temperature of the rotating electric machine is used as the adhesive material 13, the semiconductive tape 12 of the composite tape 11D and the non-adhesive layer 16 Can be used even if the thermal expansions of the two are different. Further, the non-adhesive layer 16 does not come off the semiconductive tape 12 due to the tension applied when the coil is wound around the coil conductor 3. Further, during the operation of the rotating electric machine, the adhesive 13 is softened, and the stress is also reduced between the semiconductive tape 12 and the non-adhesive layer 16, so that a more reliable rotating electric machine can be manufactured. The same effect can be obtained in a structure in which the composite tape 11D is wound on the ground insulating layer 4 such that the surface of the semiconductive tape 12 is on the ground insulating layer 4 side, and the semiconductive tape 10 is wound thereon. Can be The semiconductive tapes 10, 1
2 and the surface resistance of the conductive non-adhesive layer 16 are desirably in the range of 10 ² to 10 ⁵ Ω from the viewpoint of suppressing eddy current and tan δ.

Embodiment 6 FIG. 10 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 6 of the present invention, and FIG. 11 is a stator according to Embodiment 6 of the present invention. It is sectional drawing which shows the inside of the stator core of the high voltage | pressure rotary electric machine which incorporated the coil.

In the sixth embodiment, as shown in FIG. 10, the composite tape 11E is
A non-adhesive layer 16 having a width of about 2 is provided on one surface of the semiconductive tape 12 with a conductive adhesive 18 along the edge of the semiconductive tape 12.
It is configured to be stuck by using.

Next, a method of manufacturing the stator coil according to the sixth embodiment will be described with reference to FIG. First, the mica tape is wound around the outer periphery of the coil conductor 3 a plurality of times, and the ground insulating layer 4 is formed on the outer periphery of the coil conductor 3. Then, the semiconductive tape 10 is wound around the outer periphery of the ground insulating layer 4 to form the first layer of the surface corona prevention layer 31E. Further, the composite tape 11E is attached to the outer periphery of the semiconductive tape 10 so that the nonadhesive layer 16 is in contact with the semiconductive tape 10 and a gap is provided in the width direction of the nonadhesive layer 16.
The second winding of the surface corona prevention layer 31E
The layers are formed, and the stator coil 30E is manufactured. The stator coil 30E manufactured as described above is housed in the slot 8, connected, and then impregnated with a thermosetting resin and cured to be integrated with the stator core 1.

The thus configured stator coil 30E
Then, the non-adhesive layer 16 and the semiconductive tape 12 are in close contact with each other via the conductive adhesive 18, and the semiconductive tape 10 and the semiconductive tape 12 of the composite tape 11 </ b> E are electrically connected via the non-adhesive layer 16. Connected. And, this stator coil 30E
Is incorporated in the slot 8 of the stator core 1 so that the semiconductive tape 12 of the composite tape 11E comes into contact with the inner wall surface of the slot 8 and is wound around the outer periphery of the ground insulating layer 4 and the composite tape 11E, Since the stator core 1 is electrically connected and has the same potential, partial discharge on the surface of the ground insulating layer 4 is prevented, and the insulation performance of the ground insulating layer 4 is not reduced.
A rotating electric machine having high reliability and excellent characteristics over a long period of time can be manufactured. Further, the forced connection piece 15 is not used, and the coating width of the adhesive material does not need to be worked, so that the stator coil manufacturing workability is excellent.

Here, if the adhesive-side surface of the non-adhesive layer 16 (tape) used in the manufacture of the composite tape 11E is roughened by an adhesive treatment such as corona treatment, alkali treatment, or sandpaper polishing, the adhesive 18 Can be firmly adhered by the non-adhesive layer 16, and there is no displacement due to the tension when the composite tape 11 </ b> E is wound around the coil conductor 3 around which the ground insulating layer 4 is wound, and stable characteristics can be obtained. Further, this conductive structure may be installed on the entire surface inside the stator core 1 or may be installed partially. However, in the case of partial installation, depending on the length of the stator core 1 and the surface resistance of the semiconductive tapes 10 and 12, from the viewpoint of suppressing an increase in tan δ, it may be provided at intervals of about 1 to 2 m. When the rotating electric machine is impregnated with resin, pre-drying is performed. If a thermosetting adhesive material that cures at the pre-drying temperature is used as the adhesive material 18, the semiconductive tape 12 and the non-adhesive layer 16
If the heating is performed at a temperature equal to or higher than the thermosetting temperature after the composite tape 11E is manufactured by bonding the semiconductive tape 12 and the non-adhesive layer 16
Since the tape is firmly adhered to the coil conductor 3 around which the ground insulating layer 4 is wound, there is no displacement due to the tension when the composite tape 11E is wound, and stable characteristics can be obtained. If a high-molecular thermoplastic material having a rework temperature higher than the drying temperature before impregnation and lower than the operating temperature of the rotating electric machine is used as the adhesive material 18, the composite tape 11E
It can be used even when the thermal expansion of the semiconductive tape 12 differs from that of the non-adhesive layer 16. Further, the non-adhesive layer 16 does not come off the semiconductive tape 12 due to the tension applied when the coil is wound around the coil conductor 3. Further, during the operation of the rotating electric machine, the adhesive 18 is softened, and the stress is also reduced between the semiconductive tape 12 and the non-adhesive layer 16, so that a more reliable rotating electric machine can be manufactured. The same effect can be obtained in a structure in which the composite tape 11E is wound on the ground insulating layer 4 such that the surface of the semiconductive tape 12 is on the ground insulating layer 4 side, and the semiconductive tape 10 is wound thereon. Can be The surface resistance of the semiconductive tapes 10 and 12 and the conductive non-adhesive layer 16 is 10 ² to 10 ⁵ Ω from the viewpoint of suppressing eddy current and tan δ.
Is desirable.

[0062]

Since the present invention is configured as described above, it has the following effects.

According to the present invention, the stator includes the coil conductor, the ground insulating layer provided so as to cover the periphery of the coil conductor, and the surface corona prevention layer provided so as to cover the ground insulating layer. In the stator coil of the rotating electric machine, which is housed in the iron core slot, is impregnated with the thermosetting impregnating resin together with the stator core and is hardened, and is integrated with the stator iron core by the cured product of the resin, The layer is composed of a first layer formed by winding a first semiconductive tape around the ground insulating layer, and a non-adhesive layer having a width smaller than that of the second semiconductive tape provided on one surface of the second semiconductive tape. The tape is wound around the outer periphery of the first layer with the non-adhesive layer facing the inner periphery, contacting the non-adhesive layer with the first semiconductive tape, and providing a gap in the width direction of the non-adhesive layer. Laminated structure with second layer formed The stator core is wound around the second layer so that one end thereof is in contact with the first semiconductive tape and the other end is extended to the outer periphery. When integrated, the second semiconductive tape and the forcible connection piece are in contact with the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the fixed Since the cores are configured so as to have the same electric potential electrically, when the core is assembled in the rotating electric machine, the electric connection between the first semiconductive tape, the second semiconductive tape, and the stator core becomes strong. Connected to prevent the occurrence of partial discharge on the surface of the ground insulation layer and the surface of the composite tape, as well as ensuring the mold releasability between the ground insulation layer and the stator core slot, and lowering the insulation performance of the ground insulation layer , High reliability and excellent long-term properties The stator coil of the rotating electric machine is obtained.

Further, since one end of the forcible connection piece is wound around the first layer, the electric connection between the first semiconductive tape, the second semiconductive tape and the stator core is improved. Can be strong.

Further, a coil conductor, a ground insulating layer provided so as to cover the periphery of the coil conductor, and a surface corona prevention layer provided so as to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape having a non-adhesive layer narrower than the tape on one side of the semi-conductive tape is provided on the outer periphery of the ground insulating layer, with the non-adhesive layer facing the outer peripheral side. A first layer that is in contact with the ground insulating layer and that is overlapped and wound so as to provide a gap in the width direction of the non-adhesive layer, and a second layer in which a second semiconductive tape is wound around the outer periphery of the first layer. It has a laminated structure with two layers Further, one end of the conductive forcible connection piece is rolled into the first layer so as to extend the other end to the outer peripheral side, and the other end of the extended end contacts the second semiconductive tape, When integrated with the stator core, the second
Is in contact with the inner wall surface of the stator core slot, so that the first semiconductive tape, the second semiconductive tape, and the stator core have the same electric potential. Therefore, when incorporated in the rotating electric machine, the first semiconductive tape-the second semiconductive tape-the stator core are electrically connected firmly, and partial discharge on the surface of the ground insulating layer or the surface of the composite tape is prevented. Generation can be prevented, the releasability between the ground insulation layer and the stator core slot is ensured, the deterioration of the insulation performance of the ground insulation layer is suppressed, and high reliability and excellent long-term excellent characteristics are achieved. Thus, a stator coil of a rotating electric machine having the same is obtained.

Further, since one end of the forcible connection piece is wound around the second layer, the electrical connection between the first semiconductive tape, the second semiconductive tape and the stator core is improved. Can be strong.

Further, since the forcible connection piece is made of a metal tape, the electric connection between the first semiconductive tape, the second semiconductive tape, and the stator core can be further strengthened.

Also, since the forcible connection piece is made of a semiconductive woven or nonwoven fabric formed by impregnating a glass or polyester base material with a resin to which conductive particles are added, it is necessary to integrate the resin with the stator core. Without impairing the impregnating property of the thermosetting resin, and can be firmly integrated with the fixed iron core.

Further, the forcible connection piece converts the conductive particles into PTF.
E, PFA, ETFE or PVDF made of semi-conductive tape made by adding it to fluororesin, so the releasability is improved and the occurrence of peeling and cracking in the ground insulating layer can be further suppressed .

Further, since at least a part of the outer peripheral surface of the forcible connection piece is bonded, the forcible connection piece is firmly fixed to the thermosetting resin, and the non-adhesion layer and the ground insulating layer are directly over the forcible connection piece. Even if the semiconductive tape is released from the mold, the forcible connection piece does not shift.

Since the non-adhesive layer is conductive,
The electric contact area with the forcible connection piece increases, and the electric connection between the first semiconductive tape, the second semiconductive tape, and the stator core can be further strengthened.

Since the non-adhesive layer is insulative,
The material of the non-adhesive layer is inexpensive, and cost reduction is achieved.

The coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona preventing layer disposed to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A first semiconductive tape wound around the outer periphery of the ground insulating layer;
A composite tape comprising a layer and a conductive non-adhesive layer having a width exceeding one half of the width of the tape and smaller than the width of the tape on one side of the second semiconductive tape in the longitudinal direction of the tape. Is wound around the outer periphery of the first layer so that the non-adhesive layer faces the inner periphery, the non-adhesive layer contacts the first semiconductive tape, and a part of the non-adhesive layer in the width direction overlaps. When integrated with the stator core, the second semiconductive tape is in contact with the inner wall surface of the stator core slot, and the first semiconductive tape is integrated with the stator core. Since the conductive tape, the second semiconductive tape, and the stator core are configured to be electrically at the same electric potential, the first semiconductive tape and the second semiconductive tape are connected via a conductive non-adhesive layer. When electrical connection with the semiconductive tape is ensured and manufacturing workability is improved To, when incorporated into a rotary electric machine,
The first semiconductive tape, the second semiconductive tape, and the stator core are electrically connected firmly to prevent the occurrence of partial discharge on the surface of the ground insulating layer or the surface of the composite tape. And the stator core slot are secured, and the insulation performance of the ground insulating layer is prevented from lowering.
A stator coil of a rotating electric machine having excellent characteristics over a long period of time can be obtained.

Further, a coil conductor, a ground insulating layer provided so as to cover the periphery of the coil conductor, and a surface corona prevention layer provided so as to cover the ground insulating layer are provided in a stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is On one side of one semiconductive tape over half the width of this tape, and
A composite tape, in which a conductive non-adhesive layer having a width smaller than the width of the tape is provided in the length direction of the tape, is provided on the outer periphery of the ground insulating layer, with the non-adhesive layer facing the outer periphery, and the first half. A first layer formed by winding a conductive tape in contact with the ground insulating layer and overlapping a part of the non-adhesive layer in the width direction, and a second semiconductive tape are wound around the outer periphery of the first layer. The second semiconductive tape is configured to have a laminated structure with a second layer that is turned, and when integrated with the stator core, the second semiconductive tape contacts the inner wall surface of the stator core slot, and Since the semiconductive tape, the second semiconductive tape, and the stator core are configured to have the same electric potential, the first semiconductive tape and the second semiconductive tape are interposed via a conductive non-adhesive layer. Electrical connection between the semi-conductive tape and the manufacturing workability is improved. In addition, when assembled into a rotating electric machine, the first semiconductive tape-the second semiconductive tape-the stator core are electrically connected firmly, and the partial discharge on the surface of the ground insulating layer and the surface of the composite tape Generation can be prevented, and the releasability between the ground insulation layer and the stator core slot is ensured. The deterioration of the insulation performance of the ground insulation layer is suppressed, and the reliability is high and the characteristics are excellent in the long term. Thus, a stator coil of a rotating electric machine having the following is obtained.

Further, since the non-adhesive layer is provided on one side of the semiconductive tape of the composite tape except at both ends in the width direction of the semiconductive tape, the non-adhesive layer is integrated with the stator core. The impregnation property of the thermosetting resin in is improved,
Can be firmly integrated with the fixed iron core.

Also, a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A first semiconductive tape wound around the outer periphery of the ground insulating layer;
Layer and a conductive non-adhesive layer having a width smaller than half of the tape width on one surface of the second semiconductive tape, and the bonding area of the non-adhesive layer is set to be not more than half of the total area of the non-adhesive layer on the bonding side. A non-adhesive layer is attached to the first semiconductive tape on the outer periphery of the first layer with the non-adhesive layer facing the inner peripheral side; A second layer that is wrapped so as to provide an interval in the width direction of the layer.
The second semiconductive tape contacts the inner wall surface of the stator core slot when integrated with the stator core, and the first semiconductive tape, the first semiconductive tape, Since the second semiconductive tape and the stator core are configured to have the same electric potential electrically, the first semiconductive tape and the second semiconductive tape are connected via the conductive non-adhesive layer. The electrical connection between the first semi-conductive tape, the second semi-conductive tape and the stator core is electrically connected when incorporated in the rotating electric machine. It is firmly connected, prevents partial discharge on the surface of the ground insulating layer and the surface of the composite tape, and secures the mold releasability between the ground insulating layer and the stator core slot, and the insulation performance of the ground insulating layer Is low, high reliability and excellent long-term properties The stator coil of the rotating electric machine is obtained.

Further, a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A conductive non-adhesive layer having a width smaller than half of the tape width is provided on one side of the semiconductive tape, and an insulating layer is formed so that the joint area of the non-adhesive layer is less than half of the total area of the joint side of the non-adhesive layer. A composite tape affixed with an adhesive material has the non-adhesive layer facing the outer periphery of the ground insulating layer, the first semiconductive tape is in contact with the ground insulating layer, and the width direction of the non-adhesive layer is Space A first layer formed by lap winding, the second
Is formed in a laminated structure with a second layer wound around the outer periphery of the first layer, and when integrated with the stator core, the second semiconductive tape is fixed to the second core. Since the first semiconductive tape, the second semiconductive tape, and the stator core are configured to have the same electric potential in contact with the inner wall surface of the core core slot, conductive non-adhesive The electrical connection between the first semiconductive tape and the second semiconductive tape is ensured via the layer, and the manufacturing workability is improved. The semiconductive tape-second semiconductive tape-stator core is electrically connected firmly to prevent the occurrence of partial discharge on the surface of the ground insulating layer or the surface of the composite tape. Releasability from the iron core slot is ensured, and the insulation performance of the ground insulation layer is low. Is suppressed, reliable, stator coil of a rotating electric machine having a long-term excellent characteristics can be obtained.

Further, since the adhesive material is formed on one surface of the semiconductive tape of the composite tape in the form of vertical stripes, horizontal stripes, or spots, the adhesive tape has a non-adhesive portion with the semiconductive tape of the composite tape. Electrical contact with the adhesive layer is reliably ensured.

Further, since a plurality of depressions are formed in the surface of the composite tape on the non-adhesive layer side of the semiconductive tape and the adhesive is filled in the depressions, irregularities appear on the surface of the non-adhesive layer. And the releasability can be improved.

Further, a coil conductor, a ground insulating layer provided so as to cover the periphery of the coil conductor, and a surface corona preventing layer provided so as to cover the ground insulating layer are provided in the stator core slot. In a stator coil of a rotating electric machine which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer is A first semiconductive tape wound around the outer periphery of the ground insulating layer;
And a composite tape formed by attaching a conductive non-adhesive layer having a width smaller than half the width of the tape to one surface of the second semi-conductive tape with a conductive adhesive material. The non-adhesive layer is in contact with the first semiconductive tape, with the layer facing the inner peripheral side, and has a laminated structure with a second layer that is overlapped and wound so as to provide an interval in the width direction of the non-adhesive layer. When configured and integrated with the stator core, the second semiconductive tape contacts the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape and Since the stator core is configured to have the same electric potential, the electric current between the first semiconductive tape and the second semiconductive tape via the conductive non-adhesive layer and the adhesive material. Connection is ensured, manufacturing workability is improved, and When incorporated, the first semiconductive tape-second semiconductive tape-stator iron core is electrically connected firmly, and the occurrence of partial discharge on the surface of the ground insulating layer or the surface of the composite tape can be prevented, In addition, the releasability between the ground insulation layer and the stator core slot is ensured, and the insulation performance of the ground insulation layer is prevented from deteriorating. A child coil is obtained.

Further, a coil conductor, a ground insulating layer disposed so as to cover the periphery of the coil conductor, and a surface corona preventing layer disposed so as to cover the ground insulating layer are provided in a stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape formed by attaching a conductive non-adhesive layer having a width smaller than half of the tape width to one surface of the semi-conductive tape with a conductive adhesive material is provided on the outer periphery of the ground insulating layer. The first semiconductive tape is in contact with the ground insulating layer, and the first semiconductive tape is overlapped and wound so as to provide an interval in the width direction of the non-adhesive layer. Wound around the outer periphery of the first layer It is provided in a multilayer structure of the second layer formed by, when integrated with the stator core, the second
Is in contact with the inner wall surface of the stator core slot, so that the first semiconductive tape, the second semiconductive tape, and the stator core have the same electric potential. Therefore, electrical connection between the first semiconductive tape and the second semiconductive tape is ensured via the conductive non-adhesive layer and the adhesive material, so that manufacturing workability is improved and rotation is achieved. When installed in an electric machine, the first semiconductive tape-the second semiconductive tape-the stator core are electrically connected firmly, preventing the occurrence of partial discharge on the surface of the ground insulating layer or the surface of the composite tape A rotating electric machine that is capable of securing the releasability between the ground insulating layer and the stator core slot, preventing the insulation performance of the ground insulating layer from deteriorating, and having high reliability and excellent long-term characteristics. Is obtained.

Further, since the above-mentioned adhesive is thermosetting,
By curing the pressure-sensitive adhesive at the time of producing the composite tape, the non-adhesive layer does not shift due to the tension applied when winding the composite tape, and stable characteristics can be obtained.

Also, since the above-mentioned adhesive is thermoplastic,
The adhesive can absorb the stress caused by the difference in thermal expansion between the semiconductive tape and the non-adhesive layer of the composite tape and the tension applied when winding the composite tape.

Further, since the bonding surface of the non-adhesive layer is subjected to the adhesive treatment, the non-adhesive layer is firmly fixed by the adhesive material, and the displacement of the non-adhesive layer due to the tension applied when winding the composite tape is prevented. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a stator of a high-voltage rotating electric machine incorporating a stator coil according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view showing the inside of the stator core of the high-voltage rotating electric machine incorporating the stator coil according to Embodiment 1 of the present invention;

FIG. 3 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 2 of the present invention.

FIG. 4 is a cross-sectional view showing the inside of a stator core of a high-voltage rotating electric machine incorporating a stator coil according to Embodiment 2 of the present invention;

FIG. 5 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 3 of the present invention.

FIG. 6 is a sectional view showing the inside of a stator core of a high-voltage rotating electric machine incorporating a stator coil according to Embodiment 3 of the present invention;

FIG. 7 is a plan view illustrating an applied state of an adhesive in a composite tape applied to a stator coil according to Embodiment 4 of the present invention.

FIG. 8 is a plan view illustrating an application state of another adhesive material on a composite tape applied to a stator coil according to Embodiment 4 of the present invention.

FIG. 9 is a sectional view showing a composite tape applied to a stator coil according to Embodiment 5 of the present invention.

FIG. 10 is a perspective view showing a configuration of a composite tape applied to a stator coil according to Embodiment 6 of the present invention.

FIG. 11 is a cross-sectional view showing the inside of a stator core of a high-voltage rotating electrical machine incorporating a stator coil according to Embodiment 6 of the present invention.

FIG. 12 is a perspective view showing a slot outlet portion of a high-voltage rotating electric machine incorporating a stator coil as a conventional improvement.

FIG. 13 is a cross-sectional view showing the inside of a stator core of a high-voltage rotating electric machine incorporating a stator coil as a conventional improvement.

[Explanation of symbols]

1 stator core, 3 coil conductors, ground insulation layer, 8
Stator core slot, 10 semiconductive tape (first semiconductive tape), 11, 11A, 11B, 11C, 11
D, 11E composite tape, 12 semiconductive tape (second semiconductive tape), 13 insulating adhesive material, 14 non-adhesive layer, 15 forced connection piece, 16 conductive non-adhesive layer, 17
Depression, 18 conductive adhesive material, 30, 30A, 30
B, 30E stator coil, 31, 31A, 31B, 31
E Surface corona prevention layer.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Wataru Mito 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Shiro Takada 2-3-2 Marunouchi, Chiyoda-ku, Tokyo (72) Nobuo Urakawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5H604 AA01 BB14 CC01 CC05 CC14 DB02 PB03 PD03 PD04 PD07 5H615 AA01 BB14 PP01 PP08 PP12 PP14 QQ02 QQ19 RR02 SS05 SS41

Claims (22)

[Claims] A coil conductor, a ground insulating layer disposed so as to cover the periphery of the coil conductor, and a surface corona prevention layer disposed so as to cover the ground insulating layer, are housed in a stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape comprising a first layer formed by winding one semiconductive tape around the outer periphery of the ground insulating layer, and a non-adhesive layer having a width smaller than that of the second semiconductive tape is provided on one surface of the second semiconductive tape. The non-adhesive layer is directed to the inner peripheral side on the outer periphery of one layer, the non-adhesive layer is brought into contact with the first semiconductive tape, and is overlapped and wound so as to provide a gap in the width direction of the non-adhesive layer. It has a two-layer structure, A conductive force-connecting piece is wound around the second layer so that one end is in contact with the first semiconductive tape and the other end is extended to the outer peripheral side, and is integrated with the stator core. In this case, the second semiconductive tape and the forcible connection piece are in contact with the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the stator core are electrically connected. A stator coil for a rotating electrical machine, wherein the stator coil is configured to have the same electrical potential. 2. The stator coil according to claim 1, wherein one end of the forcible connection piece is wound around the first layer. 3. A stator core slot comprising: a coil conductor; a ground insulating layer disposed to cover the periphery of the coil conductor; and a surface corona prevention layer disposed to cover the ground insulating layer. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core, and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape having a non-adhesive layer narrower than the tape on one side of the semi-conductive tape is provided on the outer periphery of the ground insulating layer, with the non-adhesive layer facing the outer peripheral side. A first layer that is in contact with the ground insulating layer and that is overlapped and wound so as to provide a gap in the width direction of the non-adhesive layer, and a second layer in which a second semiconductive tape is wound around the outer periphery of the first layer. It has a laminated structure with two layers. The conductive forcible connection piece has one end caught in the first layer so as to extend the other end to the outer peripheral side, and contacts the second semiconductive tape at the other end extending, When integrated with the stator core, the second semiconductive tape contacts the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the stator A stator coil for a rotating electric machine, wherein an iron core is configured to have the same electrical potential. 4. The stator coil according to claim 3, wherein the other end of the forced connection piece is wound around the second layer. 5. The stator coil for a rotating electric machine according to claim 1, wherein the forcible connection piece is made of a metal tape. 6. The semi-conductive woven or non-woven fabric formed by impregnating a glass or polyester substrate with a resin to which conductive particles are added, wherein the forcible connection piece is made of a woven or non-woven fabric. Item 5. A stator coil for a rotary electric machine according to any one of Items 4. 7. The forcible connection piece is made of conductive particles made of PTFE or PF.
2. A semi-conductive tape made by adding to a fluororesin such as A, ETFE or PVDF.
A stator coil for a rotating electric machine according to any one of claims 1 to 4. 8. A method according to claim 7, wherein at least a part of the outer peripheral surface of the forcible connection piece is bonded.
The stator coil of the rotating electric machine as described in the above. 9. The stator coil for a rotating electric machine according to claim 1, wherein the non-adhesive layer is conductive. 10. The stator coil for a rotating electric machine according to claim 1, wherein the non-adhesive layer is insulative. 11. A stator core slot comprising a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A first layer formed by winding one semiconductive tape around the outer periphery of the ground insulating layer; and a half-width of the tape on one surface of a second semiconductive tape;
A composite tape formed by providing a conductive non-adhesive layer having a width smaller than the width of the tape in the longitudinal direction of the tape has the non-adhesive layer facing the inner periphery of the first layer, A non-adhesive layer is in contact with the first semiconductive tape, and has a laminated structure of a second layer formed by overlappingly winding the non-adhesive layer so as to partially overlap the non-adhesive layer, and is integrated with the stator core. At this time, the second semiconductive tape contacts the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the stator core have the same electric potential. A stator coil for a rotating electric machine, wherein the stator coil is configured as described above. 12. A coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer, and housed in a stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape, comprising a conductive non-adhesive layer having a width exceeding one-half the width of the tape and having a width smaller than the width of the tape on one side of the semiconductive tape, is provided in the longitudinal direction of the tape. The first semiconductive tape is in contact with the ground insulating layer with the non-adhesive layer facing the outer peripheral side on the outer periphery of the layer, and the first semiconductive tape is overlap-wound so as to partially overlap the width direction of the non-adhesive layer. One layer and a second semiconductive tape Is formed in a laminated structure with a second layer wound around the outer periphery of the first layer, and when integrated with the stator core, the second semiconductive tape is A stator coil for a rotating electric machine, wherein the first semiconductive tape, the second semiconductive tape, and the stator core are in contact with an inner wall surface so as to have the same electric potential. . 13. The semiconductor device according to claim 11, wherein the non-adhesive layer is provided on one surface of the semiconductive tape of the composite tape except at both ends in the width direction of the semiconductive tape. Item 13. A stator coil for a rotating electric machine according to item 12. 14. A coil conductor, comprising: a ground insulating layer disposed to cover the periphery of the coil conductor; and a surface corona prevention layer disposed to cover the ground insulating layer, and housed in a stator core slot. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A first layer in which one semiconductive tape is wound around the ground insulating layer, and a conductive non-adhesive layer having a width smaller than half of the tape width on one surface of the second semiconductive tape. A composite tape, which is bonded with an insulating adhesive so that the bonding area of the adhesive layer is equal to or less than half of the total area of the bonding side of the non-adhesive layer, faces the non-adhesive layer toward the inner periphery toward the outer periphery of the first layer. Then, the non-adhesive layer is applied to the first semiconductor A non-adhesive layer that is in contact with the tape and has a laminated structure with a second layer that is wound and wound so as to provide an interval in the width direction of the non-adhesive layer; A semiconductive tape is in contact with the inner wall surface of the stator core slot, and the first semiconductive tape, the second semiconductive tape, and the stator core are configured to have the same electric potential. A stator coil for a rotating electric machine, characterized in that: 15. A stator core slot comprising a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A conductive non-adhesive layer having a width smaller than half of the width of the tape on one side of the semiconductive tape,
A composite tape attached with an insulating adhesive so that the bonding area of the non-adhesive layer is less than or equal to half of the total area of the non-adhesive layer on the bonding side is directed to the outer periphery of the ground insulating layer. The first semiconductive tape is in contact with the ground insulating layer, and the first layer and the second semiconductive tape are overlapped and wound so as to provide an interval in the width direction of the non-adhesive layer. It is configured in a laminated structure with a second layer wound around the outer periphery of one layer, and when integrated with the stator core, the second semiconductive tape is attached to the inner wall surface of the stator core slot. A stator coil for a rotating electric machine, wherein the first semiconductive tape, the second semiconductive tape, and the stator core are in contact with each other so as to have the same electric potential. 16. The composite material according to claim 14, wherein the adhesive is formed on one surface of the semiconductive tape of the composite tape in the form of vertical stripes, horizontal stripes, or spots.
The stator coil of the rotating electric machine as described in the above. 17. The composite tape according to claim 14, wherein a plurality of depressions are formed on the surface of the semiconductive tape on the non-adhesive layer side, and the adhesive is filled in the depressions. 15. The stator coil of the rotating electric machine according to 15. 18. A stator core slot comprising a coil conductor, a ground insulating layer provided to cover the periphery of the coil conductor, and a surface corona prevention layer provided to cover the ground insulating layer. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A first layer formed by winding one semiconductive tape around the ground insulating layer; and a conductive non-adhesive layer having a width smaller than half of the tape width on one surface of the second semiconductive tape. A composite tape affixed with the adhesive material of the above, the non-adhesive layer is directed to the inner peripheral side of the outer periphery of the first layer, the non-adhesive layer is in contact with the first semiconductive tape, and the width of the non-adhesive layer is Wrapped so that there is a gap in the direction When integrated with the stator core, the second semiconductive tape is in contact with the inner wall surface of the stator core slot, and the first semiconductive tape is formed. A stator coil for a rotating electric machine, wherein a tape, the second semiconductive tape, and the stator core are configured to have the same electric potential. 19. A stator core slot comprising a coil conductor, a ground insulating layer disposed to cover the periphery of the coil conductor, and a surface corona prevention layer disposed to cover the ground insulating layer. In a stator coil of a rotating electric machine, which is impregnated and cured with a thermosetting impregnating resin together with a stator core and is integrated with the stator core by a cured product of the resin, the surface corona prevention layer includes A composite tape formed by attaching a conductive non-adhesive layer having a width smaller than half of the tape width to one side of the semiconductive tape with a conductive adhesive material is provided on the outer periphery of the ground insulating layer. Toward the first
A semiconductive tape in contact with the ground insulating layer, and a first layer formed by lapping so as to provide an interval in the width direction of the non-adhesive layer; and a second semiconductive tape on the outer periphery of the first layer. The second semiconductive tape is configured to have a laminated structure with a wound second layer, and when integrated with the stator core, the second semiconductive tape contacts an inner wall surface of the stator core slot, and Wherein the semiconductive tape, the second semiconductive tape, and the stator core are configured to have the same electric potential electrically. 20. The stator coil for a rotating electric machine according to claim 14, wherein the adhesive is thermosetting. 21. The stator coil for a rotating electric machine according to claim 14, wherein the adhesive is thermoplastic. 22. The stator coil for a rotating electric machine according to claim 14, wherein a bonding surface of the non-adhesive layer is subjected to an adhesive treatment.