WO2024052961A1 - 固定子コイルの製造方法、固定子コイル及び回転機 - Google Patents

固定子コイルの製造方法、固定子コイル及び回転機 Download PDF

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Publication number
WO2024052961A1
WO2024052961A1 PCT/JP2022/033280 JP2022033280W WO2024052961A1 WO 2024052961 A1 WO2024052961 A1 WO 2024052961A1 JP 2022033280 W JP2022033280 W JP 2022033280W WO 2024052961 A1 WO2024052961 A1 WO 2024052961A1
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WIPO (PCT)
Prior art keywords
tape
coil
mica
stator coil
resin
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Ceased
Application number
PCT/JP2022/033280
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English (en)
French (fr)
Japanese (ja)
Inventor
貴裕 馬渕
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2022/033280 priority Critical patent/WO2024052961A1/ja
Priority to JP2024545291A priority patent/JPWO2024052961A1/ja
Publication of WO2024052961A1 publication Critical patent/WO2024052961A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines

Definitions

  • the present disclosure relates to a method for manufacturing a stator coil, a stator coil using the same, and a rotating machine.
  • a coil insulation material (called a coil insulating material) on the inner periphery of the stator core.
  • coil insulating materials are required not only to withstand voltage but also to efficiently transfer heat from the coil conductor to the iron core. High heat dissipation is desired.
  • the method for manufacturing the coil insulating material involves wrapping a mica tape, which is a mica sheet with a fiber reinforcing material such as glass cloth, around the coil conductor several times, and applying a low-viscosity liquid curable resin composition (hereinafter referred to as liquid resin) under reduced pressure.
  • a low-viscosity liquid curable resin composition hereinafter referred to as liquid resin
  • Vacuum impregnation method in which semi-cured resin is placed on an insulating tape, and the tape with semi-cured resin placed on the insulating material is wrapped around a coil conductor and heated and pressed.
  • a resin rich method etc. are commonly used.
  • the vacuum impregnation method is suitable for manufacturing large-scale high-voltage rotating machines that are expected to operate for a long time because voids that become insulation defects are less likely to occur inside the coil insulating material.
  • a coil wrapped with mica tape containing liquid resin is fitted into a mold and compressed under pressure. It is possible to drain from the end. By heating the coil in this state to harden the liquid resin, the content of mica in the coil insulating material increases, making it possible to improve voltage resistance.
  • the liquid resin is heated before the curing reaction begins, causing its viscosity to temporarily decrease and leaking out from the gaps between the mica tapes. In some cases, voids, which become insulation defects, occur on the surface of the coil insulating material.
  • Patent Document 1 discloses that mica tape is wound around the surface of the coil conductor to a predetermined thickness to form a main insulating base material layer, and the outside of the main insulating base material layer at the coil end portion is heated.
  • a method is described in which a finishing tape made by bonding a shrinkable cloth tape and a heat-shrinkable film tape is wrapped, and vacuum impregnation with resin and heat treatment are performed.
  • the finishing tape shrinks due to heat during the heat curing treatment of the resin, making it possible to prevent the resin from leaking from the coil end portion. Therefore, it is possible to suppress the generation of voids in the coil insulating material and improve the voltage resistance.
  • the present disclosure has been made to solve the above-mentioned problems, and aims to provide a method for manufacturing a stator coil that can improve voltage resistance and heat dissipation.
  • a method for manufacturing a stator coil according to the present disclosure includes a first step of wrapping a mica tape around a coil conductor in which a conductor is wound into a coil shape, and a second step of wrapping a prepreg tape around the coil conductor wrapped with the mica tape. , a third step of wrapping a heat shrink tape around the outer periphery of the coil conductor wrapped with the mica tape and the prepreg tape, heating the coil conductor and compressing the mica tape and the prepreg tape with the shrinkage force of the heat shrink tape; A fourth step of curing the resin contained in the tape, a fifth step of removing the heat shrink tape and impregnating the mica tape with liquid resin, and a sixth step of heating the coil conductor and curing the liquid resin. Equipped with.
  • a stator coil according to the present disclosure includes a coil conductor, a first insulating layer containing mica tape and a cured liquid resin on the outer periphery of the coil conductor, and a prepreg tape on the outer periphery of the first insulating layer, without overlapping each other.
  • a second insulating layer is wound around the prepreg tape and a resin contained in the prepreg tape is cured.
  • the mica tape and the prepreg tape are compressed with a heat shrink tape before being impregnated with the liquid resin of the mica tape, and the resin contained in the prepreg tape is cured and compressed.
  • the resin contained in the prepreg tape is cured and compressed.
  • FIG. 1 is a perspective view showing a schematic configuration of a stator of a rotating machine according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a front view showing a schematic configuration of a coil end portion of a stator coil according to Embodiment 1 of the present disclosure.
  • 1 is a flowchart showing each step of a method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 3 is a cross-sectional view showing a coil conductor in a first step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 1 is a perspective view showing a schematic configuration of a stator of a rotating machine according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a front view showing a schematic configuration of a coil end portion of a stator coil according to Embodiment 1 of the present disclosure.
  • 1 is a flowchart showing each step of a method for manufacturing a stator coil
  • FIG. 3 is a cross-sectional view showing a coil conductor in a second step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 7 is a cross-sectional view showing a coil conductor in a third step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 7 is a cross-sectional view showing a coil conductor in a fourth step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 7 is a cross-sectional view showing a coil conductor in a fifth step and a sixth step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • FIG. 3 is a cross-sectional view showing a coil insulating material according to Embodiment 2 of the present disclosure.
  • FIG. 7 is a cross-sectional view along the rotation axis of a rotating machine according to Embodiment 3 of the present disclosure.
  • FIG. 3 is a sectional view showing a rotating machine according to Embodiment 3 of the present disclosure.
  • FIG. 1 is a perspective view showing a schematic configuration of a stator of a rotating machine according to Embodiment 1 of the present disclosure.
  • two stages of stator coils 3 are housed inside slots 2 of a stator core 1.
  • a spacer (not shown) is inserted between the two stages of stator coils 3, and a wedge 4 for fixing the stator coil 3 is arranged at the open end of the slot 2. .
  • the wedge 4 suppresses vibrations based on electromagnetic force generated from the stator coil 3 during operation of the rotating machine.
  • an example is shown in which two stages of stator coils 3 are housed inside the slots 2 of the stator core 1, but the number of stator coils 3 housed in the slots 2 is not limited in the present disclosure. shall be taken as a thing.
  • FIG. 2 is a front view showing a schematic configuration of a coil end portion of a stator coil according to Embodiment 1 of the present disclosure.
  • the coil end portion has a curved shape in which the coil conductor 5 serving as the conductor portion of the stator coil 3 is curved.
  • the coil conductor 5 may be, for example, a bundle of rectangular metal wires.
  • the periphery of the coil conductor 5 is covered with a coil insulating material 6 to form ground insulation with the stator core.
  • the coil insulating material 6 is made of mica tape, prepreg tape, and liquid resin impregnated into mica tape.
  • a rectangular metal wire is used as an example of the cross-sectional shape of the coil conductor 5, but the cross-sectional shape of the coil conductor may be circular or the like.
  • FIG. 3 is a flowchart showing each step of the method for manufacturing a stator coil according to Embodiment 1 of the present disclosure.
  • the method for manufacturing a stator coil includes steps from step S1 to step S6.
  • Step S1 is the first step of wrapping the mica tape 7 around the coil conductor 5.
  • Step S2 is a second step of wrapping the prepreg tape 9 around the coil conductor 5 around which the mica tape 7 is wound.
  • Step S3 is the third step of wrapping the heat shrink tape 8 around the outer periphery of the coil conductor 5 around which the mica tape 7 and the prepreg tape 9 are wound.
  • Step S4 is a fourth step in which the coil conductor 5 is heated and the resin contained in the prepreg tape 9 is cured while the mica tape 7 and the prepreg tape 9 are compressed by the shrinkage force of the heat-shrinkable tape 8.
  • Step S5 is a fifth step in which the heat shrink tape 8 is removed and the mica tape 7 is impregnated with the liquid resin 10.
  • Step S6 is a sixth step in which the coil conductor 5 is heated and the liquid resin 10 is cured.
  • FIG. 4 is a cross-sectional view showing a coil conductor in the first step of the stator coil manufacturing method according to Embodiment 1 of the present disclosure.
  • the mica tape 7 is wound around the coil conductor 5 several times in a half-overlap manner.
  • the mica tape 7 used in the present disclosure has a structure in which mica and a reinforcing material such as a glass cloth or a resin film are bonded together using an epoxy resin or a silicone resin.
  • the mica layer of the mica tape 7 is wound around the coil conductor 5 side, but a fluidized resin layer such as glass cloth is separately provided on the mica layer side in order to improve resin impregnation.
  • the impregnating properties of the resin may also be improved. Since the innermost layer of mica tape tends to be difficult to be impregnated with resin, it is possible to improve the impregnation property by, for example, placing glass cloth or the like on the conductor side and wrapping it around the innermost layer.
  • a method for effectively suppressing winding wrinkles is to heat the coil conductor 5 and the mica tape 7 in advance to increase the flexibility of the mica tape 7 when wrapping the mica tape 7 while applying tension. , a method in which the mica tape 7 is stored after being stored in a humidified atmosphere, and the like.
  • FIG. 5 is a cross-sectional view showing a coil conductor in the second step of the stator coil manufacturing method according to Embodiment 1 of the present disclosure.
  • a prepreg tape 9 using mica as a tape base material for example, is wrapped around the outer periphery of the coil conductor 5 around which the mica tape 7 is wound.
  • the prepreg tape 9 used in the present disclosure is a tape containing a semi-cured thermosetting resin.
  • glass cloth, mica, film, nonwoven fabric, insulating paper, cloth base material, etc. can be used as the tape base material, but since glass cloth and mica have high mechanical strength, the prepreg tape 9 of the present disclosure can be used.
  • suitable for As in the present disclosure when the prepreg tape 9 is used to enhance voltage resistance, it is desirable to use mica.
  • the prepreg tape 9 preferably has a mica mass of 30 to 100 g/m 2 per m 2 from the viewpoint of voltage resistance, and a thickness of 0.1 mm or more and 2 mm or less from the viewpoint of ease of wrapping.
  • an epoxy resin, a silicone resin, a phenol resin, or a polyester resin can be used as the thermosetting resin in a semi-cured state, and in particular, the epoxy resin has excellent adhesiveness to the mica tape 7.
  • thermosetting resin in a semi-cured state is cured by heating, and after curing, its elastic modulus increases and it is necessary to have insulation properties. Further, it is desirable that the curing start temperature of the thermosetting resin is higher than the shrinkage start temperature of the heat shrinkable tape 8 in the present disclosure.
  • the curing start temperature of the thermosetting resin can be measured by DSC (differential scanning calorimetry), and can be defined as the peak starting temperature of the exothermic reaction accompanying the curing reaction.
  • the curing initiation reaction can be controlled by the curing catalyst contained in the prepreg tape 9.
  • curing catalysts include aromatic polyamines, aliphatic polyamines, imidazole derivatives, tertiary amine salts, etc. Can be used.
  • the thermosetting resin may be combined with a metal soap composed of a bond between a metal and a long-chain fatty acid to adjust the curing start time.
  • the prepreg tape 9 can be wrapped in a manner such as a method of wrapping it multiple times in the tape width direction in a half-overlap manner, a method of wrapping it in the tape width direction so as not to overlap, etc.
  • the prepreg tape becomes two layers and becomes thicker, so that the mechanical strength increases after the prepreg tape 9 is cured.
  • the overlapping part is difficult to be impregnated with the liquid resin, and if there are voids in the overlapping part, insulation defects may occur. . In order to prevent this insulation defect, it is desirable to provide a plurality of holes in advance in the prepreg tape 9 to serve as resin impregnation channels.
  • the prepreg tape 9 when the prepreg tape 9 is wound so as not to overlap in the tape width direction, the prepreg tape 9 becomes one layer. In this case, since the prepreg tapes 9 do not overlap, there is an advantage that the liquid resin 10 is easily impregnated. For this reason, the coil insulating material 6 does not generate voids that would cause insulation defects, and thus improves voltage resistance.
  • the mechanical strength after the prepreg tape 9 is cured is lower than when the tape is wrapped in an overlapping manner in the width direction, but by using mica or glass cloth as the base material of the prepreg tape 9, the mechanical strength required for practical use is reduced. Mechanical strength can be imparted.
  • the thickness of the prepreg tape 9 is preferably 0.1 mm or more and 0.3 mm or less in order to make it easier to wind.
  • the amount of resin contained in the prepreg tape 9 is less than 20 g, the mechanical strength of the prepreg tape 9 after curing will be low and it will be easily deformed. Furthermore, if the amount of resin exceeds 200 g, the resin of the prepreg tape 9 may flow out onto the mica tape 7 when the prepreg tape 9 is cured while generating the shrinkage force of the heat-shrinkable tape 8 in the fourth step. It hardens. Therefore, the content of the resin impregnated in the fifth step may decrease. Therefore, in order to obtain the mechanical strength of the prepreg tape 9 after curing, the amount of resin contained in the prepreg tape 9 is preferably 20 g or more and 200 g or less per 1 m 2 of tape.
  • FIG. 6 is a cross-sectional view showing a coil conductor in the third step of the stator coil manufacturing method according to Embodiment 1 of the present disclosure.
  • a heat shrink tape 8 is wrapped around the outer periphery of the coil conductor 5 wrapped around the mica tape 7 and the prepreg tape 9.
  • the heat shrink tape 8 is wound so that it can be removed before performing the fifth step.
  • a plate-shaped backing plate around the outer periphery of the prepreg tape 9
  • the surface of the prepreg tape 9 can be made smooth when the heat shrink tape 8 is wound.
  • polyester tape or polyamide tape can be used as the material for the heat shrink tape 8. Furthermore, in addition to these materials, it is also possible to use a material for the heat-shrinkable tape 8 that is made of a composite material such as glass fiber to increase the strength of the tape.
  • a heat-shrinkable tape is a tape in which a resin fixed in a stretched and oriented state shrinks in a direction that releases the orientation when heated, and in the present disclosure, the shrinkage start temperature is in the range of 50°C to 130°C. desirable. Moreover, it is preferable that the shrinkage rate of the heat-shrinkable tape 8 is 3% or more. The shrinkage start temperature can be determined by checking the presence or absence of shrinkage deformation when the heat-shrinkable tape 8 is stored at a constant temperature, and the shrinkage rate can be determined by measuring the length of the tape before and after storage.
  • FIG. 7 is a cross-sectional view showing a coil conductor in the fourth step of the stator coil manufacturing method according to Embodiment 1 of the present disclosure.
  • the coil conductor 5 that has been subjected to the third step is heated for the first time to harden the prepreg tape 9 while generating the shrinkage force of the heat-shrinkable tape 8.
  • the heat-shrinkable tape 8 contracts, and the shrinkage force of the heat-shrinkable tape 8 compresses the mica tape 7 and the prepreg tape 9 in the direction of the coil conductor 5.
  • the curing reaction of the prepreg tape 9 progresses and mechanical strength is developed, so that the mica tape 7 is maintained in a compressed state.
  • the gap between the mica tape 7 is air, it is easily compressed by the contraction force of the heat shrink tape 8 in the fourth step. Furthermore, although a reaction force opposite to the compression direction is generated in the compressed mica tape 7, the prepreg tape 9 is compressed along the cross section of the mica tape 7 and hardened. Therefore, the prepreg tape 9 having high mechanical strength receives the reaction force, and the compressed state of the mica tape 7 is maintained.
  • stator coil manufacturing method of the present disclosure can be applied to the coil end portions where pressure compression molding is difficult, the stator coil end portions have better voltage resistance and heat dissipation than conventional manufacturing methods. It is possible to improve performance.
  • FIG. 8 is a cross-sectional view showing the coil conductor in the fifth step and sixth step of the stator coil manufacturing method according to Embodiment 1 of the present disclosure.
  • the prepreg tape 9 is cured while generating the shrinkage force of the heat-shrinkable tape 8, and the liquid resin 10 is applied to the mica tape 7 in a reduced pressure atmosphere using a coil with the mica tape 7 compressed.
  • Impregnate After impregnating with the liquid resin 10, it is possible to pressurize with a gas such as air or nitrogen to impregnate the gap between the mica tapes 7 with the liquid resin 10, thereby suppressing the generation of voids that cause insulation defects.
  • the liquid resin 10 preferably does not contain a solvent.
  • epoxy resin, silicone resin, unsaturated polyester resin, and alkyd resin can be used as the type of resin.
  • Reactive diluents can be added to these resins since the lower the viscosity, the higher the impregnability.
  • Reactive diluents include acrylate monomers, methacrylate monomers, styrene, vinyltoluene, diallylphthalate, monoepoxides, and the like.
  • the liquid resin 10 used in the fifth step has a different curing temperature from the resin contained in the prepreg tape 9 in the second step, so it is preferable to use a different resin from the prepreg tape 9. may also be used.
  • the coil impregnated with the liquid resin 10 is heated to advance the curing reaction of the liquid resin 10, the liquid resin 10 is cured, and the mica tape 7 and the coil conductor 5 are integrated. .
  • the second heating is performed in a temperature range of 90° C. to 180° C. under normal pressure in order to thermally cure the liquid resin 10. In this manner, the stator coil according to the present embodiment can be obtained through the first to sixth steps.
  • the stator coil manufacturing method of the present disclosure includes the first to sixth steps.
  • the mica tape 7 and the prepreg tape 9 are compressed with a heat shrink tape 8, and the resin contained in the prepreg tape 9 is cured and maintained in the compressed state. Since it is possible to suppress the excess liquid resin 10 from being included between the tapes 7 and the generation of voids due to leakage of the liquid resin 10, it is possible to improve the voltage resistance and heat dissipation properties of the stator coil. It is possible.
  • stator coil manufacturing method of the present disclosure in order to compress the mica tape 7 in advance and fix the state with the prepreg tape 9 before impregnating with the liquid resin 10, The step of compressing the mica tape 7 can be omitted.
  • the excess liquid resin contained between the mica tapes 7 is discharged from the gaps between the mica tapes, so the flow path for the liquid resin is narrow with only the gaps between the mica tapes 7, and the excess liquid resin is discharged through the gaps between the mica tapes 7.
  • the stator coil manufacturing method of the present disclosure can shorten the manufacturing time of the stator coil 3.
  • Embodiment 2 In the second embodiment, the same reference numerals are used for the same components as in the first embodiment of the present disclosure, and descriptions of the same or corresponding parts are omitted.
  • a stator coil according to a second embodiment will be described with reference to the drawings.
  • FIG. 9 is a cross-sectional view showing a coil insulating material according to Embodiment 2 of the present disclosure.
  • the first insulating layer 11 and the second insulating layer 12 shown in FIG. 9 are made by impregnating the gap between the mica tapes 7 with liquid resin 10 and hardening it in the second heating process, and are different from those in the first embodiment. This is obtained by the stator coil manufacturing method based on the above method.
  • the liquid resin 10 is heated and cured to become a cured product 15 of liquid resin.
  • the prepreg tape 9 includes a resin 13 and mica 14.
  • the resin contained in the second insulating layer 12 is one in which mica 14 is hardened by heating before impregnating the coil, and hardened again when the liquid resin 10 forming the first insulating layer 11 is heated.
  • the second insulating layer 12 on the outermost surface of the stator coil 3 is composed of mica 14 wound so as not to overlap in the tape width direction, and It is characterized by high smoothness.
  • the outermost surface of a typical coil is composed of mica tape 7 wrapped so as to overlap in the tape width direction, and the thickness of each tape layer is stepped. There is.
  • the surface of the stator coil 3 is smooth like the stator coil of the present disclosure, when the stator coil 3 is inserted into the slot 2, it can be placed in close contact with the surface of the slot 2, thereby improving heat dissipation. be able to.
  • a semiconductive sheet or a nonlinear resistance material may be placed on the surface of the slot 2 to alleviate the electric field between the coil and the iron core.
  • the mica tape 7 of the first insulating layer 11 is wrapped only around the outermost circumference so as not to overlap in the tape width direction and impregnated with the liquid resin 10 without using the prepreg tape 9, the liquid resin 10 will leak out during heating and curing. , voids that become insulation defects occur on the surface of the stator coil 3. In addition, if a film tape or the like is wrapped to prevent this, the heat dissipation will decrease depending on the thickness of the film tape, and the adhesion at the interface between the film tape and the mica tape 7 will be poor, causing the body of the device to Peeling failure occurs.
  • the resin 13 When the prepreg tape 9 is wrapped around the second insulating layer 12 of the present disclosure so as not to overlap in the tape width direction, the resin 13 is uniformly melted, so the liquid resin 10 will not leak out during heating and curing.
  • the resin 13 In order for the resin 13 to melt uniformly, the resin 13 must have a curing reactivity different from that of the liquid resin 10 used for the first insulating layer 11, a higher curing reactivity than the liquid resin 10, and a temperature that is half-melted at room temperature. It is desirable that the resin is in a hardened state and that the curing reaction proceeds while melting at a lower temperature than the liquid resin 10 during heating.
  • the liquid resin 10 used for the first insulating layer 11 is a liquid at room temperature, and is cured after being impregnated into the mica tape 7.
  • the resin 13 is cured first during heating, so the first insulating layer 11 and the second insulating layer 12 of the present disclosure have resin compositions with different curing start temperatures. is suitable.
  • these resins include epoxy resins from the viewpoint of adhesive properties.
  • Embodiment 3 a stator coil will be described using the same reference numerals for the same components as in Embodiment 1 of the present disclosure.
  • FIG. 10 is a cross-sectional view along the rotation axis of a rotating machine according to Embodiment 3 of the present disclosure.
  • the rotating machine 16 of the present disclosure includes a stator core 17, a tightening member 18, a retaining ring 19, a frame 20, an intermediate member 21, and an elastic support member 22.
  • the tightening members 18 are a plurality of members that are provided on the outer periphery of the stator core 17 at predetermined intervals in the circumferential direction and tighten the stator core 17 in the axial direction.
  • the retaining rings 19 are provided on the outer periphery of the stator core 17 at predetermined intervals in the axial direction, and tighten the stator core 17 from the outer periphery of the core tightening member 18 in the rotation axis direction.
  • a cylindrical frame 20, an intermediate frame member 21, and an elastic support member 22 are provided around the stator core 17 in which the retaining ring 19 is disposed.
  • the middle frame members 21 are a plurality of ring-shaped members that protrude in the axial direction from the inner surface of the frame 20 at predetermined intervals in the axial direction.
  • the elastic support member 22 is fixed to the adjacent middle frame members 21 and consists of a spring plate fixed to the retaining ring 19 at its axial center.
  • FIG. 10 shows an example in which four retaining rings 19 are arranged on the outer periphery of the stator core 17, and five middle frame members 21 are provided on the inner surface of the frame 20 at predetermined intervals in the axial direction.
  • FIG. 11 is a sectional view showing a rotating machine according to Embodiment 3 of the present disclosure.
  • the rotating machine 16 includes a rotor (not shown), a stator 17 that is arranged coaxially with the rotor and has slots 2 on the surface facing the rotor, and This is a rotating machine in which a stator coil 3 is housed in a slot 2.
  • FIG. 11 is a cross-sectional view taken along the dashed line A-A' in FIG.
  • FIG. 11 shows an example in which eight core tightening members 18 are provided on the outer periphery of the stator 17 in a rotating machine 16, and four elastic support members 22 are arranged between the retaining ring 19 and the middle frame member 21. It shows.
  • the rotating machine shown here constitutes, for example, the armature of a turbine generator.
  • a predetermined number of slots formed in the axial direction are provided in the circumferential direction on the inner peripheral portion of the stator core 17, and the stator coil 3 is disposed within the slot. Since the rotary machine including the stator coil 3 according to Embodiments 1 and 2 of the present disclosure can have a high withstand voltage of the stator coil, it is possible to achieve higher output and further miniaturization.
  • increasing the voltage resistance of the coil insulating material 6 makes it possible to reduce the thickness of the insulating material used in the rotating machine, reducing heat generation in the coil conductor 5. Therefore, the output efficiency of the generator can be improved.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)
PCT/JP2022/033280 2022-09-05 2022-09-05 固定子コイルの製造方法、固定子コイル及び回転機 Ceased WO2024052961A1 (ja)

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PCT/JP2022/033280 WO2024052961A1 (ja) 2022-09-05 2022-09-05 固定子コイルの製造方法、固定子コイル及び回転機
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140965A (en) * 1978-04-26 1979-11-01 Mitsubishi Electric Corp Method of producing insulated coil
JPS55162212A (en) * 1979-06-04 1980-12-17 Hitachi Ltd Manufacture of insulated coil
JPS6212356A (ja) * 1985-07-09 1987-01-21 Toshiba Corp 固定子コイルの製造方法
JPH0297256A (ja) * 1988-10-03 1990-04-09 Toshiba Corp 回転電機コイルの製造方法
JP2017123713A (ja) * 2016-01-06 2017-07-13 株式会社明電舎 回転電機のコイルおよびその製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7498098B2 (ja) * 2020-01-17 2024-06-11 株式会社日立インダストリアルプロダクツ プリプレグマイカテープ、回転電機及び回転電機の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54140965A (en) * 1978-04-26 1979-11-01 Mitsubishi Electric Corp Method of producing insulated coil
JPS55162212A (en) * 1979-06-04 1980-12-17 Hitachi Ltd Manufacture of insulated coil
JPS6212356A (ja) * 1985-07-09 1987-01-21 Toshiba Corp 固定子コイルの製造方法
JPH0297256A (ja) * 1988-10-03 1990-04-09 Toshiba Corp 回転電機コイルの製造方法
JP2017123713A (ja) * 2016-01-06 2017-07-13 株式会社明電舎 回転電機のコイルおよびその製造方法

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