JP2002118997A - Stacked member and rotating-electric machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the rise of heat conductivity compatible with the rise in mechanical characteristics. SOLUTION: In a stacked member which is molded by stacking a plurality of insulating base materials impregnated with thermosetting resin 1 and heating and pressurizing them, an inorganic filler 4, of Morse hardness of 7 or lower and 10 W/mK or higher in heat conductivity, is added to the thermosetting resin 1 and they are added and compounded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated member formed by laminating a plurality of fiber base materials impregnated with a thermosetting resin and molding by heating and pressing, and a rotating electric machine using the same. The present invention relates to a laminated member that achieves both improvement and improvement in mechanical characteristics, and also improves cooling performance, and a rotating electric machine using the same.

[0002]

2. Description of the Related Art Generally, a laminated board formed by impregnating a thermosetting resin into a fibrous base material such as a reinforcing fiber or a woven cloth (cloth) of the reinforcing fiber, laminating a plurality of the thermosetting resins, and applying heat and pressure to the insulating substrate has an insulating structure. It is used as an object, and is called a laminated member or FRP, and has been heavily used in various fields.

[0003] Of these, glass reinforced fiber epoxy resin laminates have been most widely used, especially for electrical equipment such as rotary electric machines.

[0004] This glass-reinforced fiber epoxy resin laminate is excellent in electrical insulation and mechanical properties, has well-balanced properties capable of widely supporting heat resistance, and is economical.

[0005] However, products having high thermal conductivity have recently been desired because of their low thermal conductivity and limited use areas.

[0006] In general, in order to increase the thermal conductivity of an organic material, a method of combining an inorganic filler having a high thermal conductivity is employed.

[0007] In the case of laminates as well, studies have been made to combine inorganic fillers in order to reduce the shrinkage from room temperature to extremely low temperature in the laminating direction.

For example, “CEC / ICMC in Albuqu
e Arb-8 “GLASSFIBER REINFORCED PLASTICS FOR
CRYOGENIC USE IMPROVEMENT OF THEMAL CONTRAC
TIONAND ELASTICMODULUS IN THICKNESS DIRECTIO
N "and" Reinforced Plastics Vol. 29, No. 12, P.
537 According to the technical document "Composition and physical properties of epoxy GFRP for cryogenic use", mechanical properties such as flexural properties and compressive properties are considerably deteriorated even when a small amount of 1 to 2 Vol% of alumina or silica is combined. ing.

[0009] For example, in Japanese Patent Application Laid-Open No. 9-272155, a filler is compounded to reduce shrinkage, but the particle size and shape are devised to reduce the decrease in mechanical strength. I have to.

However, in order to increase the thermal conductivity, it is necessary to compound a large amount of hard particles of nitride or oxide to some extent.

Typical fillers include, for example, silicon nitride, aluminum nitride, alumina and the like, but these significantly reduce the mechanical properties.

[0012]

As described above, there is no laminate at the present time that achieves both an improvement in thermal conductivity and mechanical properties, and the emergence of such a laminate has been strongly desired in recent years.

An object of the present invention is to provide a laminated member capable of achieving both improvement in thermal conductivity and improvement in mechanical properties.

It is a further object of the present invention to provide a rotating electric machine capable of improving cooling performance and contributing to higher output and smaller size.

[0015]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of fibrous base materials impregnated with a thermosetting resin are laminated and formed by heating and pressing. In the member, a thermosetting resin is compounded with an inorganic filler having a Mohs hardness of 7 or less and a thermal conductivity of 10 W / mK or more.

Further, in the invention corresponding to claim 2, in the laminated member of the invention corresponding to claim 1, magnesium oxide is used as the inorganic filler.

Therefore, in the laminated member according to the first and second aspects of the present invention, an inorganic filler such as magnesium oxide having a thermal conductivity of 10 W / mK or more is added to the thermosetting resin. The thermal conductivity can be improved. The thermosetting resin has a Mohs hardness of 7
By adding and compounding the following inorganic fillers such as magnesium oxide, the fiber base material is not damaged, so that the mechanical strength as a laminated member is not reduced, and the mechanical properties can be improved. Workability can be improved.

On the other hand, in the invention according to claim 3, in the laminated member according to claim 1 or 2, a glass cloth is used as a fiber base material.

Further, in the invention according to claim 4, in the laminated member according to the invention described in claim 3, as the glass cloth, a perforated glass cloth having a space between woven yarns is used.

Further, in the invention according to claim 5, in the laminated member according to the invention described in claim 4, the inorganic filler is mainly composed of at least magnesium oxide.

Therefore, in the laminated member according to the third to fifth aspects of the present invention, by using a glass cloth such as a perforated glass cloth as the fiber base material, the thermal conductivity can be further improved. it can. In addition, as an inorganic filler, in addition to magnesium oxide, if necessary, other components can be added and compounded to further improve the thermal conductivity.

On the other hand, a prepreg of the invention according to claim 6 is a laminated member according to any one of claims 1 to 5 impregnated with a thermosetting resin mixed with an inorganic filler. In the form of a sheet or a tape, and has a B stage.

The prepreg of the invention according to claim 7 is a laminated member according to any one of claims 1 to 5 impregnated with a thermosetting resin mixed with an inorganic filler. In the form of a sheet or tape, and on at least one side thereof, mica or a layer in which a filler and mica are combined is formed to form a B stage.

Therefore, in the prepreg of the invention corresponding to claims 6 and 7, the laminated member is formed in a sheet or tape shape, and if necessary, mica or a composite layer of filler and mica is provided on at least one surface. Is formed and B-staged, the thermal conductivity of the insulating layer can be improved. In particular, an extremely useful effect can be obtained when used for bonding at a location having an uneven surface or a curved surface which is electrically insulating and requires high heat conduction.

On the other hand, an insulated coil according to an eighth aspect of the present invention is obtained by winding the prepreg according to the sixth or seventh aspect a predetermined number of times around a coil body made of a conductor, and hardening as an insulating layer. Molding.

A rotating electric machine according to a ninth aspect of the present invention includes the insulating coil according to the eighth aspect of the present invention.

Therefore, in the insulated coil and the rotating electric machine according to the eighth and ninth aspects of the present invention, the heat conductivity of the insulating layer can be reduced by winding the prepreg and forming an insulated coil as the insulating layer. This can contribute to downsizing of the coil and improvement of the cooling performance. Further, by using the insulating coil for a rotating electrical machine coil, it is possible to achieve both cooling and insulating properties of the coil.

On the other hand, a rotating electric machine according to a tenth aspect of the present invention is a rotating electric machine, wherein at least one of a slot bottom surface or a slot side surface between a coil and a slot for accommodating the coil, or between the coils, or under a wedge, The laminated member of the invention according to any one of claims 1 to 5 impregnated with a thermosetting resin to which an inorganic filler is added and compounded has a slot configuration in which the laminated member is tightly inserted. .

Therefore, in the rotating electric machine according to the tenth aspect of the present invention, at least one of the bottom surface of the slot, the side surface of the slot, between the coils, or under the wedge, which is between the coil and the slot accommodating the coil. By providing the laminated member, the cooling performance can be improved and the coil temperature can be significantly reduced, which can contribute to an increase in output and a reduction in size of the rotating electric machine.

The rotating electric machine according to the eleventh aspect of the present invention is a rotating electric machine according to the first to fifth aspects, wherein a thermosetting resin mixed with an inorganic filler is impregnated between the field coil and the iron core. A rotor having the laminated member according to any one of the aspects of the invention is inserted.

Therefore, in the rotating electric machine according to the present invention, by installing the laminated member between the field coil and the iron core, the cooling performance can be improved and the coil temperature can be reduced, and This can contribute to an increase in the output and miniaturization of the electric machine.

On the other hand, the rotating electric machine according to the invention of claim 12 is the electric rotating machine of the invention according to claim 10 or 11, wherein a heat conductivity of 0.5 W / An elastic body of mK or more is provided.

According to a thirteenth aspect of the present invention, there is provided the rotating electric machine according to the twelfth aspect of the present invention, wherein silicone rubber or silicone gel is directly provided on the laminated member as the elastic body. Alternatively, silicone rubber or silicone gel is applied and inserted into the laminated member to cure and cure.

Further, the rotating electric machine according to the present invention corresponds to the rotating electric machine according to the twelfth aspect, wherein the elastic body is made of a thermosetting resin, and the elastic body is coated and inserted into the laminated member and cured. We are trying to adhere.

Therefore, in the rotating electric machine according to the present invention, a silicone-based elastic material having a thermal conductivity of 0.5 W / mK or more, or a thermosetting By disposing the elastic body made of the conductive resin, it is possible to increase the adhesion of the contact surface of the laminated member, and it is possible to obtain a rotating electric machine that is stable with respect to heat and has high reliability.

On the other hand, a rotating electric machine according to the invention according to claim 15 is characterized in that a thermosetting resin mixed with an inorganic filler is impregnated between a field coil and a magnetic pole. A rotor provided with an insulating collar into which the laminated member of the invention corresponding to any one of the above aspects is inserted into a dovetail or tapered shape and fixed with carbon fiber or a molded part thereof is provided.

A rotating electric machine according to a sixteenth aspect of the present invention is the rotating electric machine according to the fifteenth aspect of the present invention, wherein after the insulating collar is assembled, the insulating collar is provided on a surface in contact with the field coil and the magnetic pole. The prepreg of the invention corresponding to claim 6 or 7 is arranged, and a rotor is provided by integrally bonding the field coil and the magnetic pole and the insulating collar by heat treatment after coil assembly.

Therefore, in the rotating electric machine according to the present invention, the insulating collar into which the laminated member is inserted is assembled into a dovetail or tapered shape.
If necessary, the prepreg is arranged on the surface where the insulating collar is in contact with the field coil and the magnetic pole, and the field coil and the magnetic pole and the insulating collar are integrally bonded and fixed. Without reducing the utilization factor of the rotating electric machine, it is possible to obtain a rotating electric machine including a rotor having a structure in which the insulating collar withstands the influence of centrifugal force.

[0039]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment: Claims 1 and 2)
FIG. 1 is a sectional view showing a configuration example of a laminated member according to the present embodiment.

That is, as shown in FIG. 1, the laminated member according to the present embodiment is formed by laminating a plurality of (five in this example) plate-like fiber base materials 2 impregnated with a thermosetting resin 1. In the laminated member formed by heating and pressing with the mold 3,
The thermosetting resin 1 is combined with an inorganic filler 4 having a Mohs hardness of 7 or less and a thermal conductivity of 10 W / mK or more.

Here, as the inorganic filler 4 having a thermal conductivity of 10 W / mK or more, for example, magnesium oxide is preferably used.

Magnesium oxide as the inorganic filler 4 has a Mohs hardness of 6, a Mohs hardness of 7 or less, belongs to the insulator having the highest thermal conductivity, and has an average particle diameter of the fiber diameter of the fiber base material 2. Those having a size of about three times or less are preferable.

The present laminated member is actually manufactured as follows.

That is, magnesium oxide, which is an inorganic filler 4, is added to the thermosetting resin 1, and the mixture is applied to the fiber base material 2.

Next, five fiber substrates 2 are laminated, and heated and pressed by a press mold 3 to produce a laminated member.

Next, in the laminated member according to the present embodiment configured as described above, the thermosetting resin 1 is mixed with an inorganic filler 4 such as magnesium oxide having a thermal conductivity of 10 W / mK or more. By doing so, the thermal conductivity can be improved.

That is, from the limit of the quantity that can be combined with the laminated member, the inorganic filler 4 having a thermal conductivity of 10 W / mK or more is used.
Is effective as a laminated member having improved thermal conductivity.

The thermosetting resin 1 has a Mohs hardness of 7
By adding and compounding the following inorganic fillers 4 such as magnesium oxide, the fiber base material 2 is not damaged, so that the mechanical strength of the laminated member is not reduced and the mechanical properties can be improved. it can.

Further, the machinability can be greatly improved (the machinability is facilitated).

That is, the reason why the Mohs hardness of the inorganic filler 4 is set to 7 or less is that the fiber of the fiber base material 2 (glass cloth), which is generally frequently used for a laminated member, has a Mohs hardness of 7, so This is because it is expected that the cloth will be damaged or the fibers will be broken during the heating and pressurizing manufacturing process, which will affect the mechanical strength of the laminated member.

As described above, in the laminated member according to the present embodiment, it is possible to achieve both improvement in thermal conductivity and improvement in mechanical characteristics.

(Second Embodiment: Corresponding to Claims 3 to 5) The laminated member according to the present embodiment is the same as the fiber substrate 2 of the laminated member according to the first embodiment shown in FIG.
, Using a plain-woven glass cloth.

Here, as the glass cloth, it is particularly preferable to use a perforated glass cloth having a space between woven yarns.

As the inorganic filler 4 having a thermal conductivity of 10 W / mK or more, in addition to the magnesium oxide,
It is preferable to add and compound other components and use these as the main components.

Next, in the laminated member according to the present embodiment configured as described above, a glass cloth such as a perforated glass cloth is used as the fiber base material 2 so that the first embodiment can be used. The heat conductivity can be further improved as compared with the case of (1).

In other words, when a perforated glass cloth having a coarse weave is used, since the thermal conductivity of the glass fiber is low, the factor for lowering the thermal conductivity in the laminated member is reduced, and the effect on the thermal conductivity is reduced. Is big.

In the case where the blank glass cloth is used, since the inorganic filler 4 causes little damage, the inorganic filler having a high Mohs hardness can be used, and at the same time, the sedimentation of the high thermal conductive filler in the composite coating solution. In some cases, it is preferable to use silica or the like for prevention or adjustment of the viscosity of the composite coating solution.

Further, by adding and compounding other components as necessary as the inorganic filler 4 in addition to magnesium oxide, the thermal conductivity can be further improved.

As described above, in the laminated member according to the present embodiment, it is possible to achieve both further improvement in thermal conductivity and improvement in mechanical properties.

(Third Embodiment: Corresponding to Claim 6) In this embodiment, the laminated member of the first or second embodiment is formed into a sheet shape or a tape shape, and is formed into a B stage. , A prepreg sheet or a prepreg tape.

The prepreg sheet or prepreg tape is actually made of the above-mentioned inorganic filler 4 having high thermal conductivity.
Is applied to the sheet-shaped or tape-shaped fiber base material 2 and B-staged.

Next, in the prepreg sheet or prepreg tape according to the present embodiment configured as described above, the thermal conductivity of the insulating layer is reduced by forming the laminated member into a sheet or tape shape and forming a B-stage. Can be improved.

In particular, when used for bonding an uneven surface or a curved surface requiring electrical insulation and high heat conduction, an extremely useful effect can be obtained.

(Modification: Corresponding to claim 7) The laminated member of the first or second embodiment is formed in a sheet or tape shape, and at least one surface thereof is composed of mica or a composite of an inorganic filler and mica. A prepreg sheet or a prepreg tape may be formed by forming a layer formed and forming a B stage, and as described above, in the prepreg sheet or the prepreg tape according to the present embodiment, the thermal conductivity of the insulating layer Can be improved,
It is possible to obtain an insulating member that is extremely useful when it is used for bonding a portion having an uneven surface or a curved surface, which is electrically insulative and requires high heat conduction, or the like.

(Fourth Embodiment: Claims 8 and 9)
In this embodiment, the prepreg sheet or the prepreg tape of the third embodiment or its modification is wound around a coil made of a conductor a predetermined number of times and cured and formed as an insulating layer. And a rotary electric machine is provided with the insulating coil.

Next, in the insulated coil according to the present embodiment configured as described above and the rotating electric machine having the same, a prepreg sheet or a prepreg tape is wound around the coil to form an insulated coil which is cured and formed as an insulating layer. The thermal conductivity of the insulating layer can be improved,
This can contribute to downsizing of the coil and improvement of the cooling performance.

The prepreg sheet or prepreg tape of the third embodiment is used for a rotating electric machine coil having a relatively low electric field, and the prepreg sheet or prepreg tape of the modified example is used for a rotating electric machine coil having a relatively high electric field. By using each of them, both cooling of the coil and insulation can be achieved.

As described above, in the insulating coil according to the present embodiment and the rotating electric machine having the same, the thermal conductivity of the insulating layer can be improved, and the coil and the rotating electric machine can be downsized and the cooling performance can be improved. It is possible to contribute.

(Fifth Embodiment: Corresponding to Claim 10)
In the present embodiment, the laminated member of the first or second embodiment is formed by attaching at least one of a slot bottom surface or a slot side surface between layers between a coil and a slot for accommodating the coil, between the coils, or under a wedge. A rotating electric machine having a slot structure inserted so as to be in close contact with one location is configured.

Next, in the rotating electric machine having the slot configuration according to the present embodiment configured as described above, the slot bottom surface or the slot side surface between the coil and the slot for accommodating the coil, or between the coils, or the wedge. By providing the above-described laminated member at at least one of the lower portions, the cooling performance can be improved, the coil temperature can be reduced, and the output can be increased and the size can be reduced.

As described above, in the rotating electric machine according to the present embodiment, the cooling performance can be improved and the coil temperature can be reduced, which can contribute to an increase in output and a reduction in size.

(Sixth Embodiment: Corresponding to Claim 11)
In this embodiment, a rotating electric machine is provided with a rotor having the laminated member of the first or second embodiment inserted between a field coil and an iron core.

Next, in the rotating electric machine provided with the rotor according to the present embodiment configured as described above, the cooling member is provided between the field coil and the iron core by providing the above-described laminated member. Improve performance and lower coil temperature,
This can contribute to high output and improvement in miniaturization.

As described above, in the rotating electric machine according to the present embodiment, the cooling performance can be improved and the coil temperature can be reduced, which can contribute to an increase in output and a reduction in size.

(Seventh Embodiment: Corresponding to Claims 12 to 14) In this embodiment, the fifth or sixth embodiment
In the rotating electric machine of the embodiment, an elastic body having a thermal conductivity of 0.5 W / mK or more is provided on the surface of the laminated member to be inserted.

Here, as the elastic body having a thermal conductivity of 0.5 W / mK or more, for example, silicone rubber or silicone gel is directly disposed on the laminated member, or silicone rubber or silicone gel is applied to the laminated member. It is preferable to insert and cure by vulcanization.

It is preferable that the elastic body having a thermal conductivity of 0.5 W / mK or more is made of, for example, a thermosetting resin, applied to a laminated member, inserted and cured and adhered.

Next, in the rotating electric machine according to the present embodiment configured as described above, the surface of the laminated member inserted between the coil and the slot for accommodating the coil or between the field coil and the iron core. Has a thermal conductivity of 0.5 W / m
By providing a silicone-based elastic body of K or more, or an elastic body made of a thermosetting resin, it is possible to increase the adhesion of the contact surface of the laminated member and to form no fault in the heat flow direction, A rotating electric machine capable of improving the cooling performance can be obtained.

As described above, in the rotating electric machine according to the present embodiment, it is possible to increase the adhesion of the contact surfaces of the laminated members, and since no fault is formed in the heat flow direction, the cooling performance can be improved.

(Eighth Embodiment: Corresponding to Claim 15)
In this embodiment, as shown in FIGS. 2 and 3, an insulating collar (high thermal conductive FRP) 5 into which the laminated member of the first or second embodiment is inserted is replaced with a field coil 6 and a magnetic pole 7.
And a rotor which is assembled in a dovetail or tapered shape and fixed with the carbon fiber 8 or a molded part thereof to constitute a rotating electric machine.

9 is a pole insulation (high thermal conductivity FRP)
Is shown.

Next, in the rotating electric machine having the rotor according to the present embodiment configured as described above, the insulating collar 5 into which the laminated member is inserted is assembled in a dovetail or tapered shape, and the field coil 6 and the magnetic pole 7 are assembled. And the insulating collar 5 are integrally bonded and fixed, so that the insulating collar 5 is incorporated into the laminated member and the rotation of the structure such that the insulating collar 5 can withstand the influence of centrifugal force without lowering the utilization rate of the laminated member. Thus, a rotating electric machine having a child can be obtained.

That is, since the insulating collar 5 is incorporated in the rotor, it is often the case that the integral laminated member has a structure that can withstand the influence of centrifugal force. However, the utilization rate of the laminated member is reduced, so that the material is wasted and it is not economical.

Then, this is incorporated into a laminated member, the shape is devised, and at the same time, the carbon fiber 8 having high strength, or a tape or a string in which the carbon fiber 8 is impregnated with a resin is adhered and fixed to form a laminated member. The utilization rate does not decrease, and the waste of materials is reduced, which is economical.

(Modification: Corresponding to claim 16) In the rotating electric machine according to the present embodiment, after assembling the insulating collar 5, the third surface of the insulating collar 5 is in contact with the field coil 6 and the magnetic pole 7, and the third And a prepreg sheet or prepreg tape according to the embodiment or its modification, and a rotor formed by integrally bonding the field coil 6 and the magnetic pole 7 and the insulating collar 5 by heat treatment after coil assembly. May be configured.

As described above, in the rotating electric machine according to the present embodiment, the insulating collar 5 is incorporated into the laminated member to reduce the utilization rate of the laminated member without rotating the insulating collar 5 against the influence of the centrifugal force. It is possible to obtain a rotating electric machine provided with a child.

(Other Embodiments) In each of the above embodiments, a case where a plurality of plate-shaped fiber substrates are laminated has been described. However, the present invention is not limited to this. Even in a configuration in which a plurality of components are stacked, the same operation and effect as those described above can be obtained.

[0089]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail.

Example 1 A resin system in which an aromatic amine, a curing accelerator, and a solvent were mixed with a bisphenol A type epoxy resin was combined with 90 wt% of magnesium oxide having a Mohs hardness of 6 as an inorganic filler.

As the magnesium oxide, an equal amount of Pyrokissma having a particle diameter of 3 μm and a particle diameter of 18 μm manufactured by Kyowa Chemical Industry Co., Ltd. was used.

This composite resin is applied and impregnated on a plain-woven glass cloth (thickness 0.15, warp yarn 35, weft yarn 35),
Prepreg.

[0093] The sheets are laminated,
Formed by hot press for 60 minutes under the condition of a, thickness 3mm
Was produced.

The results are shown in Table 1 below.

(Comparative Example 1) As a comparative example, Example 1 was used.
Only the resin not compounding the inorganic filler with the resin shown in
A laminated member was produced under the same manufacturing conditions as in Example 1.

(Examples 2 and 3) The same as Example 1 but a plain woven glass cloth (thickness 0.1, warp yarn 2
5, the weft yarn 25) was replaced with a thin and coarse material, and the content of magnesium oxide combined with the resin was changed.

The other manufacturing conditions were the same as in Example 1.

The results are shown in Table 1 below.

(Examples 4 to 6) The same as in Example 1 except that the glass cloth used as the fiber base material is a text glass scrim cloth KS53 manufactured by Kanebo Co., Ltd.
80 (thickness 0.11, warp yarn 16, weft yarn 15) was used.

This is a perforated glass cloth belonging to a plain weave but having a gap in the weave.

The same applies to magnesium oxide complexed with the resin, and the content was changed.

The other manufacturing conditions were the same as in Example 1.

The results are shown in Table 1 below.

[0104]

[Table 1] * 1. Filling rate: Filling rate (wt%) of the inorganic filler contained in the impregnated resin.

* 2. Thermal conductivity: Kyoto Electronics QTM-5
Measured value by 00 (W / mK).

* 3. Mechanical properties: bending strength, compression strength,
According to JIS K 6911.

The thermal conductivity of the laminated member is strongly affected by the texture density of the glass cloth.

A relatively common “plain weave glass cloth A”
In, even if the filling rate of the inorganic filler is high, the improvement in the thermal conductivity is relatively small.

The weaving density of the glass cloth is B, C
, The effect of improving heat conduction increases.

The bending strength is affected by the glass density.

Since the compressive strength does not change much, it is considered that the inorganic filler does not have an adverse effect such as damaging the glass fiber.

(Examples 7 and 8) The prepreg sheet and the prepreg tape shown in Example 4 were produced.

On one side of this material, a resin in which the aggregated mica and the alumina fine particles were combined was applied in an amount of 50 g / mica aggregated.
A mica layer having an m ² was created.

These two types of prepreg tapes were
0 mm, 30 mm in width, 800 mm in length, wrapped around the aluminum conductor four times in a 重 ね stack, wrapped a release tape on top of it, then applied a 2 mm thick iron plate, wrapped a Lumirror tape, and fixed the model coil. It was created.

The model coil was placed in a pressure tank, evacuated for a predetermined time, introduced with a liquid polyethylene wax at 150 ° C., and then pressurized to 0.5 MPa and cured for 5 hours.

After cooling, the iron plate release tape was removed, and a corona-preventive paint was applied thereon to form a model coil.

The electrical characteristics of both model coils were tested by wrapping an aluminum foil around the anti-corona paint to form electrodes, and the thermal conductivity was measured by cutting out the insulating layer.

The results of the experiment are shown in Table 2 below.

(Comparative Example 2) The configuration of a model coil is a mica prepreg tape in which an insulating tape is lined with a glass tape which is usually used.

Otherwise, the method is the same as in the case of the seventh and eighth embodiments.

[0121]

[Table 2] * 1; tan δ (%) is a value at the rated voltage.

* 2: Short-time destruction (boost rate 1 kV / se)
c) Comparison with 1 mm insulation thickness.

When applied to coil insulation, the effect of thermal conductivity is large, which can contribute to improvement in cooling performance and downsizing.

(Embodiment 9) 6 kV, 3
The laminated member having a thickness of 0.8 mm shown in the above-mentioned Example 5 was inserted into the bottom surface and both side surfaces of the stator core of the motor of 000 kW.

The laminated member was coated with silicone having a thermal conductivity of 1 W / mK in order to improve the adhesion between the coil and the slot surface.

When a load experiment was compared with a motor having the same rating manufactured under normal conditions, the coil temperature under the rated load condition was 7 ° C. lower for the motor to which this embodiment was applied, and a large cooling effect was obtained. Was.

[0127] In this case, silicone having high thermal conductivity was applied, but it is important not to form a fault in the direction of heat flow. Other than this, rubber having a certain degree of thermal conductivity, gel-like material, Polymer adhesives are useful,
Can be used.

(Examples 10 and 11) A high thermal conductive laminated member was applied to a 6 kV, 2500 kW electric motor which is a rotating electric machine.

Conventionally, since the insulating collar has a large centrifugal force, an integral structure for cutting out the laminated member has been adopted.

In this method, the material is wasted and processing takes time.

Therefore, in the tenth embodiment, the insulating collar is divided into four parts as shown in FIG. 3 so as to suppress the centrifugal force with a taper, and the butting surfaces are bonded with an epoxy-based adhesive. Was consolidated with a material obtained by combining unidirectional carbon fibers with a resin, and integrated.

Then, silicone having a thermal conductivity of 1 W / mK was applied to both surfaces.

In Example 11, the prepreg sheets of the third embodiment were arranged on both sides instead of the carbon fibers of Example 10.

In both embodiments, the pole insulation was the same.

A prepreg sheet is wound twice around the magnetic pole so as to be in close contact with each other, and silicone having a thermal conductivity of 1 W / mK is applied to the surface of the high heat conductive laminated member which is in contact with the coil. Was inserted in the gap.

After assembling as shown in FIG.
Heat treatment was performed at 0 ° C. for 5 hours to cure the resin, and the resin was integrated by bonding.

A load experiment was conducted to compare the conductor temperature with the conventional method. As a result, there was no difference between the two examples, and a cooling effect of 10 ° C. was confirmed.

Further, even under the condition of rotation at 3600 rpm,
There was no abnormality in the assembled insulating collar, and it was confirmed that this assembly method can be used satisfactorily.

[0139]

As described above, according to the laminated member of the first to fifth aspects of the present invention, an inorganic filler such as magnesium oxide having a thermal conductivity of 10 W / mK or more is added to the thermosetting resin. Since the composition is added and combined, the thermal conductivity can be improved.

Further, since an inorganic filler such as magnesium oxide having a Moh's hardness of 7 or less is added to the thermosetting resin and compounded, the fiber base material is not damaged, so that the mechanical strength as a laminated member is reduced. , And the mechanical properties can be improved, and the machinability can be further improved.

Further, since a glass cloth such as a perforated glass cloth having a coarse weave is used as the fiber base material, it is possible to further improve the thermal conductivity.

Further, since magnesium oxide having a Mohs hardness of 6 is used as an inorganic filler having a Mohs hardness of 7 or less, the fiber base material is not damaged, so that the mechanical strength of the laminate is reduced. Good without doing. Furthermore, the machinability is extremely good.

As described above, as the high thermal conductive laminated member,
An effect having excellent thermal conductivity and excellent mechanical strength can be obtained.

On the other hand, according to the prepreg of the invention of claim 6 and claim 7, the high heat conductive laminated member is formed in a sheet or tape shape, and if necessary, at least one surface is provided with a mica or a filler and a mica. Since the composite layer is formed and B-staged, it is possible to improve the thermal conductivity of the insulating layer, and particularly to a portion having an uneven surface or a curved surface which is electrically insulating and requires high heat conduction. When used for bonding or the like, an extremely useful effect can be obtained.

According to the insulating coil and the rotating electric machine of the invention of claim 8 and claim 9, the prepreg is wound to form an insulating coil which is cured and formed as an insulating layer. Performance can be improved, and it is possible to contribute to downsizing of the coil and improvement of the cooling performance. Further, by using the insulating coil for a rotating electric machine coil, it is possible to achieve both cooling and insulating properties of the coil.

On the other hand, according to the rotating electric machine of the present invention, the laminated member is provided between the coil and the slot for accommodating the coil, and between the field coil of the rotor and the iron core. Since the cooling device is installed, the cooling performance can be improved and the coil temperature can be greatly reduced, which can contribute to an increase in the output and a reduction in the size of the rotating machine.

According to the rotary electric machine of the present invention, the insulating collar into which the laminated member is inserted is assembled in a dovetail or tapered shape, and the insulating collar contacts the field coil and the magnetic pole as necessary. Since the prepreg is disposed on the surface and the field coil and the magnetic pole and the insulating collar are integrally bonded and fixed to each other, the insulating collar can be incorporated into the laminated member without lowering the utilization rate of the laminated member. It is possible to obtain a rotating electric machine including a rotor having a structure that can withstand the influence of centrifugal force.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration example of a laminated member according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a field coil in a rotary electric machine according to an eighth embodiment of the present invention.

FIG. 3 is a schematic view showing an example of an insulating collar in a rotary electric machine according to an eighth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Thermosetting resin 2 ... Fiber base material 3 ... Press type 4 ... Inorganic filler 5 ... Insulation collar 6 ... Field coil 7 ... Magnetic pole 8 ... Carbon fiber 9 ... Pole insulation.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01B 17/56 H01B 17/56 L A 17/60 17/60 BC H02K 3/34 H02K 3/34 B // C08L 63:02 C08L 63:02 (72) Inventor Hisayuki Hirai 2-4-4 Suehirocho, Tsurumi-ku, Yokohama, Kanagawa Prefecture Inside Toshiba ITEC Corporation (72) Inventor Noriyuki Iwata 2-4-2, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Inside Toshiba Keihin Works (72) Inventor Hiroshi Hatano 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Toshiba Keihin Works 2-72-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Inside the Toshiba Keihin Plant (72) Inventor Kazunari Karasawa 2-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa F-term (reference) 4F072 AB09 AB28 AD28 AE06 AF04 AF06 AG03 AL14 5G303 AA07 AA08 AB12 AB20 BA02 BA06 CA01 CA02 CA04 CA0 9 CB17 5G333 AA03 AA05 AB05 CA01 CB01 CB11 DA04 DA21 DA23 DA25 FB04 FB11 FB27 5H604 AA05 AA08 BB01 CC01 CC04 DA05 DA07 DA25 DB07 DB11 DB16 QA06 QB15

Claims (16)

[Claims] A laminated member formed by laminating a plurality of fiber base materials impregnated with a thermosetting resin and molding by heating and pressing, wherein the thermosetting resin has a Mohs hardness of 7 or less and a thermal conductivity of 10 W. A laminated member comprising an inorganic filler of / mK or more added and compounded. 2. The laminated member according to claim 1, wherein the inorganic filler is made of magnesium oxide. 3. The laminated member according to claim 1, wherein a glass cloth is used as the fibrous base material. 4. The laminated member according to claim 3, wherein the glass cloth is a perforated glass cloth having a space between woven yarns. 5. The laminated member according to claim 4, wherein the inorganic filler mainly contains at least magnesium oxide. 6. The laminated member according to any one of claims 1 to 5, wherein the laminated member is impregnated with a thermosetting resin obtained by adding and compounding the inorganic filler,
A prepreg characterized by being made into a B stage. 7. The laminated member according to any one of claims 1 to 5, wherein the laminated member is impregnated with a thermosetting resin obtained by adding and compounding the inorganic filler.
A prepreg characterized by forming mica or a composite layer of a filler and mica on at least one surface thereof and forming a B-stage. 8. An insulated coil, wherein the prepreg according to claim 6 is wound around a coil body made of a conductor a predetermined number of times, and cured as an insulating layer. 9. A rotating electric machine comprising the insulating coil according to claim 8. 10. A thermosetting resin in which the inorganic filler is added and compounded to at least one of a bottom surface of a slot, a side surface of a slot, between coils, or under a wedge, between a coil and a slot for accommodating the coil. A rotating electric machine having a slot configuration in which the laminated member according to any one of claims 1 to 5 is inserted so as to be in close contact with the laminated member. 11. The laminated member according to claim 1, wherein a thermosetting resin mixed with the inorganic filler is impregnated between the field coil and the iron core. A rotating electric machine comprising a rotor constituted by: 12. The rotating electric machine according to claim 10 or 11, wherein a thermal conductivity of 0.5 W /
A rotating electric machine comprising an elastic body having a mK or more. 13. The rotating electric machine according to claim 12, wherein a silicone rubber or a silicone gel is directly disposed on the lamination member as the elastic body, or a silicone rubber or a silicone gel is laminated on the lamination member. A rotating electric machine characterized in that it is applied and inserted into a substrate and vulcanized and cured. 14. The rotating electric machine according to claim 12, wherein the elastic body is made of a thermosetting resin, and is applied to and inserted into the laminated member to be hardened and adhered. . 15. The laminated member according to claim 1, wherein a thermosetting resin mixed with the inorganic filler is impregnated between the field coil and the magnetic pole. A rotating electric machine, comprising: a rotor formed by assembling a dovetail or tapered insulating collar to be fixed with carbon fibers or molded parts thereof. 16. The rotary electric machine according to claim 15, wherein after assembling the insulating collar, the prepreg according to claim 6 or 7 is provided on a surface where the insulating collar contacts the field coil and the magnetic pole. And a rotor formed by integrally bonding the field coil and the magnetic pole and an insulating collar by heat treatment after coil assembly.