JP2017163727A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of improving a heat radiation performance and an insulation performance between a coil and a core without significantly deteriorating a workability in inserting the coil into the core.SOLUTION: A rotary electric machine according to the present invention is a rotary electric machine 101 with one or more longitudinal coils 8 stored in slots 7G of a core 7 and impregnated and hardened with an insulating resin. The rotary electric machine includes liners 12 each of which is disposed between an inner surface of the slot 7G and the coil 8 and retains an outermost periphery of the coil 8, and three or more side liners 131 inserted partially in between the inner surface of the slot 7G and the liner 12 to fix the coil 8 to the core 7. The side liner 131 is disposed in the coil 8 in a longitudinally dispersed state.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotating electrical machine represented by a high voltage generator such as a high voltage motor for a general industry, a railway, or a wind generator. More specifically, the present invention relates to a rotating electrical machine that is impregnated and cured with an insulating resin in a state where a coil for the rotating electrical machine is housed in a core.

  In a rotating electrical machine such as an electric motor or a generator, a stator in which a stator coil is accommodated in a slot of a stator core is generally used. As a method for insulating a rotating electrical machine coil and a core in such a rotating electrical machine, the resin is cured at the time of coil formation and then stored in the core (prepreg method and single impregnation method), and the coil is stored in the core. There is a method of impregnating and curing resin (total impregnation method).

  In the former method, the coil is housed in the core after the liner is placed in the core, or the liner and the coil are housed in the core at the same time. (Wedge) is driven in and the coil is fixed in the core. On the other hand, in the latter method, after the coil or liner not impregnated with the insulating resin is mounted in the core, for example, the insulating resin is impregnated in a vacuum state, and then the resin is cured to ensure the insulation of the coil. In addition, the coil is fixed so that there is no gap between the coil and the core.

  However, in any method, due to electromagnetic vibration during operation, damage to the insulation layer due to intermittent electrical contact discharge, or damage to the insulation layer due to coil temperature rise due to unstable thermal contact There is a risk that problems such as (voids, peeling, etc.) may occur.

  In order to eliminate such problems, for example, a prepreg type rotating electrical machine (Patent Document 1) in which an elastic body is inserted between the liner and the stator core to reduce thermal resistance, or a side liner is provided in the slot. A rotating electrical machine suitable for a prepreg method or a single impregnation method in which a conductive path is secured by providing a semiconductive rubber-filled layer in the air gap (Patent Document 2), and an insulating dielectric layer is disposed between the coil and the core to make it steep There has been proposed a rotating electrical machine (Patent Document 3) suitable for a full impregnation method in which charging current due to a surge voltage is prevented from concentrating on a coil insulating layer.

JP 2013-208044 A Japanese Unexamined Patent Publication No. 7-95739 JP 2005-341706 A

  However, the technique disclosed in Patent Document 1 is applicable to a prepreg method in which a coil is cured with a resin and then housed in a core. However, when applied to a full impregnation method, a drying step before resin impregnation and curing is performed. In addition to the contraction of the coil insulating layer, the elastic body may be deformed and contracted, and there is a possibility that variations in heat dissipation performance and insulation performance after resin curing may occur.

  The technique disclosed in Patent Document 2 can be applied to the prepreg method and the like as in the technique of Patent Document 1, but when applied to the full impregnation method, coil insulation in the drying process before resin impregnation / curing is performed. Due to the shrinkage of the layer, voids and cracks are generated, which may reduce the insulation performance after the resin is cured.

  Furthermore, although the technique disclosed in Patent Document 3 is suitable for the entire impregnation method, the resin is impregnated and cured through a drying process after the unimpregnated coil is inserted into the core. In order to realize the performance, it is necessary to reduce the margin of the slot width of the core with respect to the unimpregnated coil width, and the work man-hours tend to increase significantly, for example, by compressing the coil insulating layer in advance and inserting it into the core. On the other hand, when the slot width has a margin, resin outflow at the time of resin curing and resin peeling at the time of operation are likely to occur, and the insulation performance may be deteriorated.

  The present invention has been made based on the circumstances as described above, and its purpose is to provide heat dissipation performance and insulation between the coil and the core without greatly deteriorating workability when the coil is housed in the core. An object of the present invention is to provide a rotating electrical machine capable of improving performance.

The present invention
(1) A rotating electrical machine in which one or two or more elongated coils housed in each slot of a core are impregnated and hardened with an insulating resin,
A liner interposed between the inner surface of the slot and the coil and holding the outermost periphery of the coil;
Three or more side liners inserted into a part between the inner surface of the slot and the liner and fixing the coil to the core;
The rotating machine is characterized in that the side liners are arranged in a dispersed state in the longitudinal direction of the coil,
(2) The rotating electrical machine according to (1), wherein three or more side liners are disposed at least at a substantially central portion in the longitudinal direction of the coil and at both ends in the longitudinal direction of the coil,
(3) The three or more side liners have at least a substantially central portion in the longitudinal direction of the coil and a portion other than the substantially central portion, and the amplitude of electromagnetic vibration of the coil during operation in the longitudinal direction of the coil The rotating electrical machine according to (1), wherein the rotating electrical machine is disposed in a region that is a maximum.
(4) The three or more side liners have at least a substantially central portion in the longitudinal direction of the coil and a portion other than the substantially central portion, and the temperature rise of the coil during operation in the longitudinal direction of the coil is a maximum. The rotating electrical machine according to (1), wherein
(5) The side liner disposed in the substantially central portion is not subjected to release treatment, and the side liners other than the side liner disposed in the substantially central portion are subjected to release treatment. The rotating electrical machine according to any one of (1) to (4),
(6) The cross section of each slot of the core in the direction orthogonal to the longitudinal direction of the coil is substantially U-shaped, and the side liner is formed on the inner surface of the slot at an arbitrary position where the side liner is positioned in the longitudinal direction of the coil. The rotating electrical machine according to any one of (1) to (5), which is disposed on any one of the surfaces,
(7) The cross section of each slot of the core in a direction orthogonal to the longitudinal direction of the coil is substantially U-shaped, and at any part where the side liner is positioned in the longitudinal direction of the coil, the side liner is formed on the inner surface of the slot. (1) The rotating electrical machine according to any one of (1) to (5) disposed on any two surfaces, and (8) each slot of the core in a direction orthogonal to the longitudinal direction of the coil. (1) to (1) in which the cross-section is substantially U-shaped and the side liner is disposed on three of the inner surfaces of the slot at an arbitrary position where the side liner in the longitudinal direction of the coil is located. The rotary electric machine according to any one of 5).

  In this specification, “slot” means a space in which a predetermined coil (stator coil, rotor coil) in a core (stator core, rotor core) can be stored, and “slot inner surface” means Means the surface of the core facing the space.

  The present invention can provide a rotating electrical machine that can improve heat dissipation performance and insulation performance between a coil and a core without greatly deteriorating workability when the coil is housed in the core.

It is a schematic sectional drawing of the rotary electric machine of the 1st Embodiment of this invention. FIG. 2 is a partially enlarged schematic cross-sectional view in the vicinity of a stator slot along the line B-B ′ of FIG. 1. It is a schematic perspective view which expands and shows a part of FIG. FIG. 4 is a partially enlarged schematic cross-sectional view in the longitudinal direction of the stator coil along the line A1-A1 ′ of FIG. It is a schematic perspective view which expands and shows a part of rotary electric machine of the 2nd Embodiment of this invention. FIG. 6 is a partially enlarged schematic cross-sectional view in the longitudinal direction of the stator coil along the line A2-A2 ′ of FIG. 5. It is a schematic sectional drawing which expands and shows a part of rotary electric machine of the 3rd Embodiment of this invention. It is a schematic sectional drawing which shows the modification of FIG. It is a schematic sectional drawing which expands and shows a part of rotary electric machine of the 4th Embodiment of this invention.

  The rotating electrical machine of the present invention is a rotating electrical machine in which one or two or more elongated coils housed in each slot of a core are impregnated and cured with an insulating resin (hereinafter also referred to as “insulating resin”). A liner interposed between the inner surface of the slot and the coil and enclosing the outermost periphery of the coil; and inserted into a part between the inner surface of the slot and the liner to fix the coil to the core. It comprises three or more side liners, and the side liners are arranged in a dispersed state in the longitudinal direction of the coil.

  Hereinafter, although the 1st-4th embodiment of the said rotary electric machine is described with reference to drawings, this invention is not limited only to embodiment described in the said drawing. In the following embodiments, a stator core and a stator coil will be exemplified and described as a core and a coil for a rotating electrical machine, respectively.

[First Embodiment]
FIG. 1 is a schematic cross-sectional view of a rotating electrical machine according to a first embodiment of the present invention. As shown in FIG. 1, the rotating electrical machine 101 is roughly configured by a housing 2, a rotating shaft 4, a rotor 5, and a stator 61.

  The housing 2 is a casing of the rotating electrical machine 101 and supports a rotor 5 described later so as to be rotatable inside the stator 61 via the rotating shaft 4. The rotary shaft 4 transmits power to the outside or receives the power from the outside, and is supported on the housing 2 by bearings 3A and 3B.

  The rotor 5 has a rotor core (iron core) 7R and a rotor coil (winding) 8R mounted on the outer peripheral side of the rotor core 7R. It is attached to the outer periphery.

  The stator 61 is fixed to the inner wall of the housing 2 and is disposed opposite to the outer periphery of the rotor 5 so as to cover the periphery of the rotor 5 through a gap. As shown in FIG. 2, the stator 61 is roughly constituted by a stator core (iron core) 7, a stator coil (winding) 8, a liner 12, and a side liner 131.

  The stator core 7 induces a magnetic flux in the stator coil 8, and the stator coil 8 is attached to the stator core 7. Specifically, the stator core 7 opens to the rotor coil 8R side, is equally spaced in the inner peripheral direction of the stator core 7, and is formed in a longitudinal shape along the axial direction of the rotary shaft 4. And a plurality of slots (winding grooves) 7G. The stator coil 8 is accommodated in the slot 7G, and the stator coil 8 is fixed in the slot 7G by inserting the wedge 9 into the wedge groove 7W formed in the opening of the slot 7G. In the present embodiment, the cross section of each slot 7G of the stator core 7 in the direction orthogonal to the longitudinal direction of the stator coil 8 is substantially U-shaped.

  The stator coil 8 generates a varying magnetic field for driving the rotor 5. This stator coil 8 forms a coil conductor 15 by bundling together a plurality of strand conductors 10 each having a strand insulation made of an insulating material through an interlayer insulation layer 11, The coil conductor 15 is formed by enclosing the outer periphery of a group of a plurality of coil conductors 15 with a main insulating layer 20 made of an insulating material. The stator coil 8 is stacked in two upper and lower stages in the slot 7G of the stator core 7 with an insulating intermediate pad 42 interposed therebetween.

  The liner 12 is interposed between the inner surface of the slot 7G and the stator coil 8, and encloses the outermost periphery of the stator coil 8, and extends in the longitudinal direction of the stator coil 8 (the axial direction of the rotary shaft 4). It is formed in a sheet shape that is integrated along. The liner 12 is preferably composed of a dielectric sheet or a semiconductive sheet from the viewpoint of stabilizing the potential of the stator coil 8. Since the liner 12 is integrated in the longitudinal direction of the coil as described above, the main insulating layer 20 of the stator coil 8 is damaged when the unimpregnated stator coil 8 is stored in the slot 7G. It can be prevented in advance.

  The side liner 131 is inserted into a part between the inner surface of the slot 7G and the liner 12, and fixes the stator coil 8 to the stator core 7. The slot 7G includes three or more side liners 131. It has been. The side liner 131 is divided into three or more in the longitudinal direction of the stator coil 8, and is arranged in a state of being dispersed at arbitrary positions in the longitudinal direction of the stator coil 8. As the side liner 131, a dielectric sheet or a semiconductive sheet can be preferably used from the viewpoint of stabilizing the potential of the stator coil 8.

  FIG. 3 is a schematic perspective view showing a part of FIG. 1 in an enlarged manner. In FIG. 3, the stator core 7 and the liner 12 are partly cut out for easy understanding of the correspondence with FIG. 2. FIG. 4 is a partially enlarged schematic cross-sectional view in the longitudinal direction of the stator coil along the line A1-A1 'of FIG. In FIG. 4, a part of the stator coil in the length direction is cut out.

  As shown in FIGS. 3 and 4, the rotating electric machine 101 includes three side liners 131 each having a substantially central portion in the longitudinal direction of the stator coil (see the side liner 131 a) and both end portions in the longitudinal direction of the stator coil. (See side liner 131b). As a result, the stator coil 8 can be geometrically stably fixed to the stator core 7, and the electromagnetic vibration is further suppressed, so that the dielectric breakdown between the stator coil 8 and the stator core 7 can be further reduced. Can be reduced.

  Further, the side liner 131 of the rotating electrical machine 101 is more specific on any one of the inner surfaces of the slot 7G at an arbitrary position where the side liner 131 is positioned in the longitudinal direction of the stator coil 8. In this embodiment, it is disposed on one side surface. Thereby, the stator coil 8 can be stably fixed to the stator core 7, and the dielectric breakdown between the stator coil 8 and the stator core 7 due to the damage of the stator coil 8 can be reduced. it can.

  Further, in the rotating electrical machine 101, the side liner 131a disposed in the substantially central portion is not subjected to the mold release process, and the side liner 131b other than the side liner 131a disposed in the substantially central portion is separated. Mold processing is applied. The side of the side liner 131b other than the side liner 131a disposed in the substantially central portion is subjected to the mold release process, and the stator core 7 and the stator coil 8 located on both sides of the side liner 131 slide with each other. It does not specifically limit as much as possible, A mold release process is performed to at least one surface. Specifically, in the present embodiment, a release treatment is performed on the surface of the side liner 131b on the liner 12 side (the surface of the side liner 131b opposite to the stator core 7). In addition, it does not specifically limit as a mold release process, For example, after apply | coating a silicone type mold release agent to the surface of the said side liner 131b, the processing method etc. which heat and dry the said surface are mentioned, for example.

  As a result, the side liner 131b other than the side liner 131a disposed in the substantially central portion is subjected to the mold release process, so that the thermal expansion is maintained while maintaining the positional relationship between the stator core 7 and the stator coil 8. It is possible to suppress the generation of thermal stress between the stator core 7 and the stator coil 8 due to the insulation, and the insulation between the stator coil 8 and the stator core 7 due to the damage of the stator coil 8. Destruction can be reduced. This is because the side liner 131b is subjected to the above releasing treatment so that they can slide with each other at the contact portion between the stator core 7 and the stator coil 8, and the thermal expansion of the stator coil 8 and the stator core 7 is achieved. This is because the thermal stress generated in the main insulating layer 20 during operation due to the difference in rate can be relaxed.

  Next, an example of a method for mounting the stator coil 8 using the full impregnation method in the rotating electrical machine 101 configured as described above will be described, but this mounting method is limited only to the following method. is not.

First, the three side liners 131 are arranged at predetermined positions on the inner surface of the empty slot 7G, and the liner 12 is installed on the entire inner surface of the slot 7G via these side liners 131. At this time, the end of the liner 12 is projected from the slot 7G.
Next, the two stator coils 8 not impregnated with the resin are stacked in two layers on the upper and lower sides via the insulating intermediate pad 42 and inserted into the liner 12 in the slot 7G. The stator coil 8 is wrapped so that the end portions of the wedges are wrapped, and the insulating wedge-filling material 41 is placed on the stator coil 8, and the wedge 9 is inserted into the wedge groove 7W above the wedge-stuffing material 41, thereby fixing the stator. The coil 8 is fixed.

Next, the stator core 7 to which the stator coil 8 is fixed is housed in a vacuum impregnation tank (not shown), and the space between the inside and outside of each insulating layer of the stator coil 8 and the slot 7G is evacuated by a known technique. Is impregnated with a thermosetting insulating resin such as an epoxy resin.
Subsequently, the impregnation tank (not shown) is pressurized and impregnated, and the stator core 7 and the stator coil 8 impregnated with the insulating resin are heated to cure the insulating resin. By cooling, the mounting of the stator coil 8 is completed.

  By using such a mounting method of the stator coil 8, the stator coil 8 with less generation of voids can be formed in the main insulating layer 20, and in addition, between the stator coil 8 and the inner surface of the slot 7G. Since the gap is small, the impregnated insulating resin can be prevented from flowing out. As a result, the retainability of the stator coil 8 in the slot 7G can be improved. Further, since the side liner 131 can be attached by a simple operation of placing or inserting the side liner 131 on the inner surface of the slot 7G of the stator core 7, workability when the side liner 131 is mounted is greatly deteriorated. There is no.

  As described above, the rotating electrical machine 101 includes the three side liners 131 that are inserted into a part between the inner surface of the slot 7G and the liner 12 and fix the stator coil 8 to the stator core 7. Since 131 is arranged in a state of being dispersed in the longitudinal direction of the stator coil 8, the stator coil 8 can be stably fixed to the stator core 7, and the stator into the stator core 7 can be fixed. The heat radiation performance and insulation performance between the stator coil 8 and the stator core 7 can be improved without greatly deteriorating the workability when the coil 8 is housed.

[Second Embodiment]
Next, a rotating electrical machine according to the second embodiment of the present invention will be described. The rotating electrical machine 102 is generally configured by a housing 2, a rotating shaft 4, a rotor 5, and a stator 62. The rotating electrical machine 102 is different from the first embodiment in the stator coil longitudinal direction where the side liner 132 is disposed in the stator 62. In addition, the housing 2, the rotating shaft 4 and the rotor 5, and the stator core (iron core) 7, the stator coil (winding) 8 and the liner 12 of the stator 62 in the present embodiment are those of the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 is an enlarged schematic perspective view showing a part of the rotating electrical machine according to the second embodiment of the present invention. In FIG. 5, the stator core 7 and the liner 12 are partially cut away in order to facilitate understanding of the correspondence with the rotating electrical machine 101 illustrated in FIG. 2. FIG. 6 is a partially enlarged schematic cross-sectional view in the longitudinal direction of the stator coil along the line A2-A2 'of FIG.

  The rotating electrical machine 102 has three or more side liners 132 in the slot 7G, and the three or more side liners 132 are at least a substantially central portion in the longitudinal direction of the stator coil 8 and other than the substantially central portion. In which the amplitude of electromagnetic vibration of the stator coil 8 during operation in the longitudinal direction of the stator coil 8 is maximized. Specifically, as shown in FIG. 6, the rotating electric machine 102 has five side liners 132, and these side liners 132 are arranged on one surface (one side surface) of the inner surfaces of the slots 7G. It is installed.

  The part where the amplitude of the electromagnetic vibration becomes maximum can be determined, for example, by performing a simulation on the vibration of the stator coil 8 during operation of the rotating electrical machine 102.

  As described above, in the rotating electrical machine 102, the side liner 132 is disposed at the substantially central portion and the portion where the amplitude of the electromagnetic vibration of the stator coil 8 during operation is maximized. The electromagnetic vibration of the stator coil 8 can be effectively suppressed by suppressing the amplitude of the coil and improving the mechanical strength, and the dielectric breakdown between the stator coil 8 and the stator core 7 can be further reduced. Can do.

  The three or more side liners include at least a substantially central portion in the longitudinal direction of the stator coil 8 and a portion of the stator coil 8 that is operating in the longitudinal direction of the stator coil 8 at a portion other than the substantially central portion. It is also preferable to be disposed in a region where the temperature rise of the region becomes maximum.

  The part where the temperature rise is maximized can be determined, for example, by performing a thermal simulation during operation of the rotating electrical machine 102.

  As described above, the temperature increase of the stator coil 8 can be effectively suppressed by disposing the side liner substantially at the center and the portion where the temperature increase of the stator coil 8 during operation is maximized. It is possible to prevent the resin from being thermally deteriorated and to reduce the dielectric breakdown between the stator coil 8 and the stator core 7.

  The side liner that suppresses the temperature rise is formed of a material having a thermal conductivity higher than the thermal conductivity of the insulating resin from the viewpoint of improving the heat dissipation by heat conduction and improving the cooling performance. It is preferable that the sheet is formed of a dielectric or semiconductive sheet having the high thermal conductivity. As such a preferable sheet, for example, a sheet formed by applying a resin filled with carbon particles or the like to a film or non-woven fabric of polyester or polyamide, or the like can be given.

[Third Embodiment]
Next, a rotating electrical machine according to the third embodiment of the present invention will be described. The rotating electrical machine 103 is generally composed of a housing 2, a rotating shaft 4, a rotor 5, and a stator 63. FIG. 7 is an enlarged schematic cross-sectional view showing a part of the rotating electric machine according to the third embodiment of the present invention. This figure is a schematic sectional view of a portion where the side liner 133 is disposed. The rotating electrical machine 103 is different from the first and second embodiments in a portion orthogonal to the longitudinal direction of the stator coil 8 in which the side liner 133 is disposed in the stator 63. The housing 2, the rotating shaft 4 and the rotor 5, and the stator core (iron core) 7, the stator coil (winding) 8 and the liner 12 of the stator 63 in the present embodiment are those of the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, the rotary electric machine 103 has a substantially U-shaped cross section of each slot 7 </ b> G of the stator core 7 in the direction orthogonal to the longitudinal direction of the stator coil 8. In any part where the side liner 133 is located, the side liner 133 is disposed on any two surfaces of the inner surface of the slot 7G, specifically, on the two surfaces on the side surface and the bottom surface in this embodiment. Yes. The side liner 133 may be divided into two on the side surface and on the bottom surface, but may be a side liner 133c in which one sheet is bent as shown in FIG.

  Thereby, the stator coil 8 can be stably fixed to the stator core 7, and the dielectric breakdown between the stator coil 8 and the stator core 7 due to the damage of the stator coil 8 can be reduced. In addition, since the side liner 133 is disposed on the side surface and the bottom surface of the slot 7G, both modes of electromagnetic vibration during operation of the stator coil 8 generated particularly in the radial direction and the circumferential direction of the stator core 7 ( Vibration can be effectively suppressed with respect to the radial vibration mode and the circumferential vibration mode.

  Moreover, the side liner 133 may be arrange | positioned on two surfaces on the both sides | surfaces of the slot 7G which has a substantially U-shaped cross section like the side liner 133d shown in FIG. As a result, the heat conduction performance from the stator coil 8 to the stator core 7 can be greatly improved compared to the first embodiment, particularly in the portion where the temperature rise of the stator coil 8 during operation is large. The temperature of the stator coil 8 can be further suppressed.

[Fourth Embodiment]
Next, a rotating electrical machine according to the fourth embodiment of the present invention will be described. The rotating electrical machine 104 is generally composed of a housing 2, a rotating shaft 4, a rotor 5, and a stator 64. FIG. 9 is an enlarged schematic cross-sectional view showing a part of the rotating electric machine according to the fourth embodiment of the present invention. This figure is a schematic cross-sectional view of a portion where the side liner 134 is disposed. The rotating electrical machine 104 is different from the first to third embodiments in a portion orthogonal to the longitudinal direction of the stator coil 8 in which the side liner 134 is disposed in the stator 64. The housing 2, the rotating shaft 4 and the rotor 5, and the stator core (iron core) 7, the stator coil (winding) 8 and the liner 12 of the stator 64 in the present embodiment are those of the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 9, the rotary electric machine 104 has a substantially U-shaped cross section of each slot 7 </ b> G of the stator core 7 in the direction orthogonal to the longitudinal direction of the stator coil 8. In any part where the side liner 134 is located, the side liner 134 is disposed on three surfaces of the inner surface of the slot 7G, that is, on both sides and the bottom surface. The side liner 134 may be a side liner 134d in which a single sheet as shown in FIG. 8 is bent over both side surfaces and the bottom surface, and it is two or three with respect to the side surface and the bottom surface. A divided side liner (not shown) may be used.

  Thereby, the stator coil 8 can be stably fixed to the stator core 7, and the dielectric breakdown between the stator coil 8 and the stator core 7 due to the damage of the stator coil 8 can be reduced. Since the side liner 134 is disposed on both sides and the bottom of the slot 7G, the electromagnetic vibration in both modes and the temperature rise of the stator coil 8 during operation as described above can be suppressed more effectively. can do.

  In addition, this invention is not limited to the structure of embodiment mentioned above, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included. Is done.

  For example, in the above-described first to fourth embodiments, the stator core 7 and the stator coil 8 are described as the core and the coil for the rotating electrical machine, respectively. However, the present invention is not limited to these. The aspect of the core can be adopted for the rotor core 7R and / or the stator core 7, and the aspect of the coil described above can be adopted for the rotor coil 8R and / or the stator coil 8.

  In the first embodiment described above, the rotating electrical machine 101 in which the side liner 131a is not subjected to the mold release process and the side liner 131b is subjected to the mold release process has been described. Within the scope of the present invention, all of the side liners of the present invention are subjected to release treatment, and those in which release treatment is applied to 131a and release treatment is not applied to at least one side liner 131b. is there.

  Further, in the above-described embodiment, the case where three or more side liners 131 to 134 are disposed on a specific surface in the slot 7G has been illustrated and described. The surface in the case of being disposed on any one of these may be the same one surface in the slot 7G or any one surface. Further, the surface when the side liner is disposed on any two of the inner surfaces of the slot 7G may be the same two surfaces in the slot 7G or any two surfaces. Good.

  Moreover, the material of each side liner can be appropriately selected from those excellent in thermal conductivity and / or excellent in mechanical strength in accordance with requirements for heat dissipation and electromagnetic vibration characteristics.

101-104 Rotating electric machine 7 Stator core 8 Stator coil 7G Slot 12 Liner 131-134 Side liner

Claims (8)

A rotating electrical machine in which one or two or more elongated coils housed in each slot of the core are impregnated and hardened with an insulating resin,
A liner interposed between the inner surface of the slot and the coil and holding the outermost periphery of the coil;
Three or more side liners inserted into a part between the inner surface of the slot and the liner and fixing the coil to the core;
The rotating electric machine according to claim 1, wherein the side liners are arranged in a state of being dispersed in a longitudinal direction of the coil.   The rotating electrical machine according to claim 1, wherein the three or more side liners are disposed at least at a substantially central portion in the longitudinal direction of the coil and at both ends in the longitudinal direction of the coil.   Three or more side liners have at least a substantially central portion in the longitudinal direction of the coil and a portion other than the substantially central portion, and the amplitude of electromagnetic vibration of the coil during operation in the longitudinal direction of the coil is maximized. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is disposed in a region.   The three or more side liners are at least a substantially central portion in the longitudinal direction of the coil, and a portion other than the substantially central portion where the temperature rise of the coil during operation in the longitudinal direction of the coil is maximized. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is disposed on the rotating electrical machine.   The side liner disposed in the substantially central portion is not subjected to release treatment, and the side liner other than the side liner disposed in the substantially central portion is subjected to release treatment. The rotating electrical machine according to claim 4.   The cross section of each slot of the core in the direction orthogonal to the longitudinal direction of the coil is substantially U-shaped, and at any part where the side liner in the longitudinal direction of the coil is located, The rotating electrical machine according to any one of claims 1 to 5, wherein the rotating electrical machine is disposed on one surface.   The cross section of each slot of the core in the direction orthogonal to the longitudinal direction of the coil is substantially U-shaped, and at any part where the side liner in the longitudinal direction of the coil is located, The rotating electrical machine according to claim 1, wherein the rotating electrical machine is disposed on the two surfaces.   The cross section of each slot of the core in the direction perpendicular to the longitudinal direction of the coil is substantially U-shaped, and at any position where the side liner is located in the longitudinal direction of the coil, the side liner is 3 of the slot inner surfaces. The rotating electrical machine according to any one of claims 1 to 5, wherein the rotating electrical machine is disposed on a surface.