WO2015004987A1 - 回転電機用部材、回転電機、および、樹脂組成物 - Google Patents

回転電機用部材、回転電機、および、樹脂組成物 Download PDF

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Publication number
WO2015004987A1
WO2015004987A1 PCT/JP2014/063011 JP2014063011W WO2015004987A1 WO 2015004987 A1 WO2015004987 A1 WO 2015004987A1 JP 2014063011 W JP2014063011 W JP 2014063011W WO 2015004987 A1 WO2015004987 A1 WO 2015004987A1
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WIPO (PCT)
Prior art keywords
resin composition
polymerizable monomer
rotating electrical
resin
electrical machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/063011
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English (en)
French (fr)
Japanese (ja)
Inventor
孝仁 村木
恵 山村
本間　雅彦
松延　豊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Priority to US14/902,442 priority Critical patent/US9957413B2/en
Priority to CN201480039028.4A priority patent/CN105359385B/zh
Priority to EP14822400.9A priority patent/EP3021460B1/en
Publication of WO2015004987A1 publication Critical patent/WO2015004987A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to a member for a rotating electrical machine, a rotating electrical machine, and a resin composition.
  • rotating electrical machines are required to have a small size and high output.
  • a rotating electrical machine for example, a large number of conductor segments having a square cross section are inserted into the slot, and then a pair of ends of each conductor segment are joined to form a stator winding, thereby reducing the space factor. What improved the output by improving the cooling performance is known.
  • the first resin composition is thinly formed on the first coil end group in which the turn part is formed and the second coil end group in which a plurality of joint parts formed by joining the tip parts are disposed.
  • a vehicle alternator stator in which the second resin composition is thickly attached only in the vicinity of the joint of the second coil end group (see, for example, Patent Document 1).
  • an electrical device that defines the material of the second resin composition used for the joint (see, for example, Patent Document 2).
  • a member for a rotating electrical machine according to the invention of claim 1 includes a coil formed of a conductive wire coated with an insulating film, and the coil includes a base unsaturated polyester resin and / or a base vinyl ester resin, and a base radical. It is coated with a resin composition comprising a polymerizable monomer, a radical polymerizable monomer having an adhesive ability to an insulating film of a conductive wire coated with an insulating film, and a photo radical polymerization initiator. .
  • a rotating electrical machine according to the invention of claim 5 is characterized by using the member for a rotating electrical machine according to any one of claims 1 to 4.
  • a resin composition according to the invention of claim 6 is composed of a base unsaturated polyester resin and / or a base vinyl ester resin, a base radical polymerizable monomer, and an insulating coating of a conductor coated with an insulating coating. It contains a radical polymerizable monomer having adhesive ability and a photo radical polymerization initiator.
  • the present invention it is possible to provide a resin composition used for a rotating electrical machine member, a rotating electrical machine and the like having excellent insulation and coil adhesion. Moreover, the member for rotary electric machines and rotary electric machine which have the outstanding insulation and coil adhesiveness can be provided only by using one type of the said resin composition. For this reason, it is possible to provide a rotating electrical machine member and a rotating electrical machine with high productivity.
  • Sectional drawing of a rotary electric machine apparatus The perspective view of a stator.
  • the figure of the joint side coil end of a stator coil. The evaluation result table of the present invention.
  • the resin composition of the present invention is (A) Unsaturated polyester resin (hereinafter referred to as “base unsaturated polyester resin”) and / or vinyl ester resin (hereinafter referred to as “base vinyl ester resin”) serving as the base material; (B) a radical polymerizable monomer (hereinafter referred to as a substrate radical polymerizable monomer) serving as a substrate; (C) a radically polymerizable monomer having a thermal latent isocyanate group; (D) a resin composition containing a radical photopolymerization initiator, (E) alkylborane and / or alkoxyamine derivatives, Other optional components may be included.
  • component and (B) component are the basic materials of the resin composition of this invention.
  • the resin composition of the present invention is characterized by the component (C), the component (D), and the component (E). Each feature will be described in the description of each component described later. Finally, a method for producing the resin composition of the present invention will be described.
  • the substrate unsaturated polyester resin is not particularly limited.
  • a condensation reaction between a dibasic acid and a polyhydric alcohol Can be obtained.
  • Specific examples of the dibasic acid used as a raw material for the base unsaturated polyester resin include ⁇ , ⁇ -unsaturated dibasic acids such as maleic acid, maleic anhydride, fumaric acid, itaconic acid, and itaconic anhydride.
  • Acids phthalic acid, phthalic anhydride, halogenated phthalic anhydride, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, succinic acid, malonic acid , Glutaric acid, adipic acid, sebacic acid, 1,10-decanedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic acid, 2,3-naphthalenedicarboxylic anhydride Products, 4,4′-biphenyldicarboxylic acid, and dialkyl esters thereof, etc. Kazuji base acid and the like, but not particularly limited. Only one kind of these dibasic acids or the like may be used, or two or more kinds
  • polyhydric alcohol used as a raw material for the base unsaturated polyester resin examples include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 2-methyl- 1,3-propanediol, 1,3-butanediol, adducts of bisphenol A and propylene oxide or ethylene oxide, glycerin, trimethylolpropane, 1,3-propanediol, 1,2-cyclohexane glycol, 1,3- Cyclohexane glycol, 1,4-cyclohexane glycol, para-xylene glycol, bicyclohexyl-4,4′-diol, 2,6-decalin glycol, tris (2-hydroxyethyl) Le)
  • isocyanurate but is not particularly limited.
  • amino alcohols such as ethanolamine may be used. Only one kind of these polyhydric alcohols may be used,
  • the base vinyl ester resin is not particularly limited as long as it can be obtained by reacting an epoxy compound and an unsaturated monobasic acid using an esterification catalyst.
  • the epoxy compound used as a raw material for the base vinyl ester resin is a compound having at least two epoxy groups in the molecule, and is not particularly limited. Specific examples thereof include bisphenol A and bisphenol. Epibis-type glycidyl ether type epoxy resin obtained by condensation reaction of bisphenols such as F and bisphenol S and epihalohydrin; condensation reaction of novolak and epihalohydrin which is a condensate of phenols such as phenol, cresol and bisphenol with formalin Novolak type glycidyl ether type epoxy resin obtained by the following: Tetrahydrophthalic acid, glycidyl ester type epoxy resin obtained by condensation reaction of hexahydrophthalic acid and epihalohydrin, 4,4'-biphenol Glycidyl ether type epoxy resin obtained by condensation reaction of 2,6-naphthalenediol, hydrogenated bisphenol or glycol and epihalohydrin; amine-containing glycidyl ether type epoxy resin obtained by condensation reaction of hydanto
  • the unsaturated monobasic acid used as a raw material for the base vinyl ester resin is not particularly limited, and specific examples include acrylic acid, methacrylic acid, and crotonic acid. Moreover, you may use half esters, such as maleic acid and itaconic acid. These unsaturated monobasic acids may be used alone or in a suitable mixture of two or more.
  • the base radical polymerizable monomer includes styrene, vinyl toluene, vinyl naphthalene, ⁇ -methyl styrene, vinyl pyrrolidone, acrylamide, acrylonitrile, allyl alcohol, allyl phenyl.
  • Examples include ether, (meth) acrylic acid ester, vinyl acetate, vinyl pyrrolidone, (meth) acrylamide, maleic acid diester, and fumaric acid diester, but are not particularly limited.
  • styrene, vinyl toluene, and (meth) acrylic acid ester for example, methacrylate, acrylate
  • (meth) acrylic acid esters examples include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, and isodecyl.
  • the radically polymerizable monomer having a heat-latent isocyanate group is used to improve the adhesion between the coil surface and the resin composition. Therefore, this radical polymerizable monomer having a heat latent isocyanate group is also referred to as an adhesive ability radical polymerizable monomer.
  • the radical polymerizable monomer having a heat latent isocyanate group include 2-methacryloyloxyethyl isocyanate, 2-methacryloyloxyethoxyethyl isocyanate, 2-acryloyloxyethyl isocyanate, 1,1-bis (acryloyloxymethyl) ethyl isocyanate.
  • isocyanate derivatives having thermal potential such as 2- (1 ′-[2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate.
  • thermal latent here means that a protecting group is removed by heating at 50 ° C. or higher, and an isocyanate group is generated. Only one kind of these compounds may be used, or two or more kinds may be appropriately mixed and used.
  • the radical photopolymerization initiator is used for insulating coating of the joint of the coil end group.
  • radical photopolymerization initiators benzyl derivatives such as diphenylethanedione, di (4-methoxyphenyl) ethanedione, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, benzoin, Benzoin derivatives such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzophenone, benzophenone derivatives such as 4,4'-bis (dimethylamino) benzophenone, 4,4'-dimethoxybenzophenone, 2-hydroxy-2-methyl Propiophenone derivatives such as propiophenone and 2-hydroxy-4 '-(2-hydroxyethoxy) -2-methylpropiophenone, 2,2-diethoxyacetophenone, anthraquinone, 2-
  • Alkylborane is a compound having a structure represented by the following formula (1), wherein —G1, —G2, and —G3 are each independently —R or —OR, and at least one of —G1 to —G3 One is -R.
  • -R is independently of each other hydrogen, alkyl group, cycloalkyl group, aralkyl group, or aryl group;
  • -OR is a hydroxyl group, alkyloxy group, cycloalkyloxy group, aralkyloxy group, or aryloxy group .
  • boron compound examples include borane, triethylborane, tripropylborane, triisopropylborane, tri-n-butylborane, tri-n-amylborane, tri-n-hexylborane, tricyclohexylborane, and 9-borabicyclo [3.3. .1]
  • Borane may be complexed with tetrahydrofuran, triethylamine, pyridine, or triphenylphosphine for easy handling.
  • examples of the boron compound oxide obtained by partially oxidizing these include diethylethoxyborane, dibutylbutoxyborane, diethylmethoxyborane, ethyldiethoxyborane, and ethylethoxymethoxyborane. Of these, diethylmethoxyborane and triethylborane are preferable because they can be easily handled in air. Since these boron compounds generate radicals by oxygen, the reaction is performed in air.
  • the alkoxyamine derivative is a compound having a structure represented by the following formula (2), -R 1 is hydrogen or an alkyl group, -X or -Y is an alkyl group or a cycloalkyl group. , An aryl group, and an alkoxycarbonyl group, and —R 2 and —R 3 are an alkyl group, a cycloalkyl group, and an alkylene group.
  • the alkoxyamine derivative is not particularly limited, and can be synthesized from N-oxyls and an ethylenically unsaturated monomer in the presence of a radical generator.
  • the radical generator used in the above reaction is not particularly limited. Specifically, for example, peroxidation such as benzoyl peroxide, lauroyl peroxide, tertiary butyl hydroperoxide, cumene hydroperoxide, ditertiary butyl peroxide and the like. 2,2′-azobis (isobutyronitrile), 1,1′-azobis (cyclohexanecarbonitrile), 4,4′-azobis (4-cyanovaleric acid), 2,2′-azobis (2 -Azobis radical generators such as -methylpropionamidine) dihydrochloride.
  • peroxidation such as benzoyl peroxide, lauroyl peroxide, tertiary butyl hydroperoxide, cumene hydroperoxide, ditertiary butyl peroxide and the like.
  • 2,2′-azobis isobutyronitrile
  • 1,1′-azobis cyclohexanecarbonitrile
  • 4,4′-azobis
  • N-oxyls used in the above reaction are not particularly limited, and specifically, for example, 1-oxyl-2,2,6,6-tetramethylpiperidine, 1-oxyl-2,2, Examples include 6,6, -tetramethylpiperidin-4-ol, 4-methoxy-2,2,6,6, -tetramethylpiperidin-1-oxyl, but are not particularly limited. These N-oxyls may be used alone or in a suitable mixture of two or more.
  • Organic peroxide may be added to the thermosetting resin composition of the present invention as necessary in order to promote curing as other optional components.
  • Organic peroxides include benzoyl peroxide, lauroyl peroxide, t-butyl peroxide benzoate, t-amyl peroxide, t-amyl peroxyneodecanoate, and t-butyl peroxyneodecanoate.
  • T-amyl peroxyisobutyrate di (t-butyl) peroxide, dicumyl peroxide, cumene hydroperoxide, 1,1-di (t-butylperoxy) cyclohexane, 2,2-di (t- Butylperoxy) butane, t-butyl hydroperoxide, di (s-butyl) peroxycarbonate, methyl ethyl ketone peroxide, etc., but are not particularly limited, and these may be used alone or in combination of two or more. You may mix. Furthermore, you may add a hardening accelerator.
  • Examples of the curing accelerator include metal salts of naphthenic acid or octylic acid (metal salts of cobalt, zinc, zirconium, manganese, calcium, etc.). These may be used alone or in combination of two or more. May be. Moreover, a polymerization inhibitor can be mix
  • the (A) component, the (B) component, the (C) component, the (D) component, and other optional components are uniformly in the air. Stir and mix. Thereafter, the component (E) is added at room temperature to obtain the resin composition of the present invention.
  • the resin composition of the present invention can be used for insulating and fixing applications of stator windings of rotating electrical machines.
  • the resin composition of the present invention can be used for insulating and fixing the field winding as in the case of the stator winding described above. .
  • the name of the resin composition of the present invention produced as described above is referred to as a resin composition 601, and is applied to a stator winding of the rotating electrical machine.
  • axial direction refers to a direction along the rotation axis of the rotating electrical machine.
  • the circumferential direction refers to the direction along the rotational direction of the rotating electrical machine.
  • the “radial direction” refers to a radial direction (radial direction) when the rotational axis of the rotating electrical machine is the center.
  • Inner circumference side refers to the radially inner side (inner diameter side)
  • outer circumference side refers to the opposite direction, that is, the radially outer side (outer diameter side).
  • FIG. 1 is a cross-sectional view showing a rotating electrical machine having a stator according to the present invention.
  • the rotating electrical machine 10 includes a housing 50, a stator 20, a stator core 21, a stator coil 60, and a rotor 11.
  • the stator 20 is fixed to the inner peripheral side of the housing 50.
  • the rotor 11 is rotatably supported on the inner peripheral side of the stator 20.
  • the housing 50 constitutes an outer casing of an electric motor that is formed into a cylindrical shape by cutting an iron-based material such as carbon steel, casting of cast steel or aluminum alloy, or pressing.
  • the housing 50 is also referred to as a frame or a frame.
  • a liquid cooling jacket 130 is fixed to the outer peripheral side of the housing 50.
  • the inner peripheral wall of the liquid cooling jacket 130 and the outer peripheral wall of the housing 50 constitute a refrigerant passage 153 for a liquid refrigerant RF such as oil, and the refrigerant passage 153 is formed so as not to leak.
  • the liquid cooling jacket 130 houses the bearings 144 and 145 and is also called a bearing bracket.
  • the refrigerant RF flows through the refrigerant passage 153 and flows out of the refrigerant outlets 154 and 155 toward the stator 20 to cool the stator 20.
  • the refrigerant RF is stored in the refrigerant (oil) storage space 150.
  • the stator 20 is composed of a stator core 21 and a stator coil 60.
  • the stator core 21 is manufactured by laminating silicon steel plates.
  • the stator coil 60 is wound around a plurality of slots 15 provided in the inner peripheral portion of the stator core 21. Heat generated from the stator coil 60 is transferred to the liquid cooling jacket 130 via the stator core 21 and is radiated by the refrigerant RF flowing through the liquid cooling jacket 130.
  • a joining side coil end 62 that is a coil end of the stator coil 60 is provided at one end of the stator 20 in the axial direction.
  • the joint-side coil end 62 has a joint joined by welding.
  • the other end in the axial direction of the stator 20 is provided with an anti-joining side coil end 61 that is a coil end of the stator coil 60. Details of the joining side coil end 62 and the anti-joining side coil end 61 will be described later.
  • the rotor 11 is composed of a rotor core 12 and a rotating shaft 13.
  • the rotor core 12 is produced by laminating silicon steel plates.
  • the rotating shaft 13 is fixed to the center of the rotor core 12.
  • the rotating shaft 13 is rotatably held by bearings 144 and 145 attached to the liquid cooling jacket 130 and rotates at a predetermined position in the stator 20 at a position facing the stator 20.
  • the rotor 11 is provided with a permanent magnet 18 and an end ring (not shown).
  • the stator 20 is inserted into the housing 50 in advance and attached to the inner peripheral wall of the housing 50, and then the rotor 11 is inserted into the stator 20.
  • the rotating shaft 13 is assembled to the liquid cooling jacket 130 so that the bearings 144 and 145 are fitted.
  • the stator 20 includes a stator core 21 and a stator coil 60 wound around a plurality of slots 15 provided on the inner peripheral portion of the stator core 21.
  • the stator coil 60 is made of a conductor (copper wire in the present embodiment) having a substantially rectangular cross section, which improves the space factor in the slot and improves the efficiency of the rotating electrical machine.
  • a slot liner 302 is disposed in each slot 15 to ensure electrical insulation between the stator core 21 and the stator coil 60.
  • the slot liner 302 is formed in a B shape or an S shape so as to wrap a copper wire.
  • Insulating paper 301 is annularly arranged for insulation between the coils of the stator coil 60.
  • the entire stator coil 60 is covered only with the resin composition 601. That is, both the joining side coil end 62 and the anti-joining side coil end 61 are covered with one type of resin composition called the resin composition 601. This is an advantage of the present invention that is different from the prior art. Thus, by covering the stator coil 60 only with the resin composition 601, it becomes possible to manufacture with one kind of manufacturing equipment.
  • a region other than the joining side coil end 62 in the stator coil 60 is covered with the first resin composition, and the joining side coil end 62 is covered with the first resin composition and the second resin composition.
  • the stator coil 60 must be covered with two types of resin compositions.
  • the “region other than the joining side coil end in the stator coil 60” includes the anti-joining side coil end 61 and the region inserted through the slot 15 of the stator coil 60.
  • the fact that the stator coil 60 of the stator 20 of the rotating electrical machine 10 of the present invention is covered only with the resin composition 601, that is, that it is covered with one kind of resin composition will be specifically shown below.
  • the covering state of the joining side coil end 62 (FIG. 6) and the covering state of the region other than the joining side coil end 62 (FIG. 4) are shown.
  • the covering state (FIG. 4) of the anti-joining side coil end 61 is shown.
  • FIG. 3 is an enlarged view of the vicinity of the anti-joining coil end 61 of the stator 20 of the rotating electrical machine 10 and is a view seen from the outer peripheral side of the stator 20.
  • the stator 20 includes a stator core 21 and a stator coil 60 wound around a plurality of slots 15 provided on the inner peripheral portion of the stator core 21.
  • the stator coil 60 is formed of a conducting wire having a substantially rectangular cross section.
  • Insulating paper 300 is annularly arranged for insulation between the coils. In order to ensure electrical insulation, the insulating paper 301 is annularly arranged.
  • a slot liner 302 is disposed in each slot 15 to ensure electrical insulation between the stator core 21 and the stator coil 60.
  • FIG. 4 is a view showing the covering state of the anti-joining side coil end 61.
  • the anti-bonding side coil end 61 is formed with an insulating coating portion 29A covered with an insulating coating such as an enamel coating over the entire surface. Furthermore, the insulating coating portion 29A is covered only with the resin composition 601, and the thickness thereof is substantially uniform.
  • the covering state of the anti-joining side coil end 61 is shown as an example of the covering state of the region other than the joining side coil end 62, but the covering state of the region other than the joining side coil end 62 is the same.
  • FIG. 5 is an enlarged view of the vicinity of the joint-side coil end 62 of the stator 20 of the rotating electrical machine 10 and is a view seen from the inner peripheral side of the stator 20.
  • the stator 20 includes a stator core 21 and a stator coil 60 wound around a plurality of slots 15 provided on the inner peripheral portion of the stator core 21.
  • the stator coil 60 is formed of a conducting wire having a substantially rectangular cross section.
  • Insulating paper 300 is annularly arranged for insulation between the coils. In order to ensure electrical insulation, the insulating paper 301 is annularly arranged.
  • a slot liner 302 is disposed in each slot 15 to ensure electrical insulation between the stator core 21 and the stator coil 60.
  • FIG. 6 is a view showing a covering state of the joining side coil end 62.
  • the joining-side coil end 62 has an insulating coating portion 29A covered with an insulating coating such as an enamel coating, and a conductive wire exposed portion 29B from which the insulating coating has been peeled and the conductive wire is exposed for bonding.
  • the conductive wire exposed portion 29B is provided at the conductive wire end portion and welded to form a coil end joint portion.
  • the insulating coating portion 29A and the conductive wire exposed portion 29B are covered only with the resin composition 601, and the thickness thereof is substantially uniform.
  • the resin composition 601 is impregnated into the coil of the rotating electrical machine member using an immersion method, a drop impregnation method, or the like.
  • the impregnation method is a conventional method and is not particularly limited.
  • the energy ray is preferably ultraviolet rays generated from a mercury lamp or the like.
  • a wavelength can be suitably selected with the radical photopolymerization initiator which is (D) component.
  • the resin composition 601 applied to the stator 20 is completely cured by heating.
  • the main heating is performed by a conventional method such as a hot air heating furnace or an IH heating furnace, and there is no particular limitation. In the examples described later, an example of this coating method is shown.
  • an unsaturated polyester resin was used from the viewpoints of cost, insulation, permeability, and curability.
  • the unsaturated polyester resin both a solvent type in which the resin is diluted with a solvent and a solventless type in which the resin is not diluted with a solvent can be used. Saturated polyester resins are more preferable, and non-styrene unsaturated polyester resins are more preferable in order to prevent deterioration of characteristics due to component volatilization during curing.
  • “only” in the description that the resin composition 601 is almost uniformly covered does not exclude the presence of an insulating coating formed on a conductor in advance, such as an enamel coating.
  • “only” means that the resin resin 601 is the only insulating resin that is provided for insulation and adhesion after the stator coil 60 is molded, and the second resin member in the prior art is not used. It is used in the meaning.
  • the term “one type” used in “one type of resin composition” is used in the same meaning as “only” described here.
  • winding method of the stator coil 60 of the above embodiment is distributed winding
  • the present invention can be applied to other winding methods such as concentrated winding.
  • the rotary electric machine of the above embodiment is an inner rotor type rotary electric machine, but can be similarly applied to an outer rotor type rotary electric machine, an axial gap type rotary electric machine, and the like.
  • the rotating electrical machine 10 of the above embodiment is a rotating electrical machine having a permanent magnet type rotor, but is also applicable to an induction machine, a rotating electrical machine having a synchronous reluctance type, a claw pole type rotor, or the like. .
  • the joint portion of this embodiment is joined by welding, but it is not necessary to limit the joining method to welding.
  • the resin composition 601 of the present invention When applied to a rotating electrical machine having a rotor using a winding field, the resin composition 601 of the present invention can also be used for the field winding. In that sense, the resin composition 601 of the present invention can be applied to a rotor and a stator that are members for a rotating electrical machine.
  • compositions 1 to 5 were actually prepared and evaluated as examples of the resin composition 601 described above. Evaluation items are covering property, permeability, adhesiveness, and heat resistance. For comparison, Comparative Examples 1 and 2 which are conventional resin compositions were also prepared and evaluated in the same manner. The evaluation results are summarized in the table shown in FIG.
  • composition example of the resin composition of the present invention (A) a base unsaturated polyester resin and / or a base vinyl ester resin; (B) a base radical polymerizable monomer; (C) a radically polymerizable monomer (adhesive ability radically polymerizable monomer) having a thermal latent isocyanate group; (D) a photo radical polymerization initiator; Composition examples 1 to 5 of the resin composition 601 containing Depending on the composition example, (E) alkylborane and / or alkoxyamine derivatives, Others further contain optional components. Details are shown below. The present invention is not limited by these composition examples.
  • the composition range of the above components is The component (C) is 1 to 10 parts by weight, the component (D) is 0.1 to 5 parts by weight, and the component (E) is 0.2 parts by weight relative to 100 parts by weight of the component (A) + (B).
  • the amount is preferably 5 parts by weight. This is because when the amount of the component (C) is less than 1 part by weight, no improvement in adhesive strength is observed. On the other hand, when the amount is more than 10 parts by weight, the effect of improving the adhesive strength reaches its peak, which is not economical.
  • the component (D) is less than 0.1 part by weight, curing becomes insufficient.
  • the effect of curing reaches its peak and is not economical.
  • the component (E) is less than 0.2 parts by weight, curing becomes insufficient. On the other hand, even if added in an amount of more than 5 parts by weight, the effect of curing reaches its peak and is not economical.
  • composition Example 1 (A) Component, 50 parts by weight of an unsaturated polyester resin containing a bisphenol A skeleton and having a number average molecular weight of 3000, (B) component, 50 parts by weight of styrene, (C) component, 2- (1 ′ [2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate, 5 parts by weight, Component (D), 0.1 part by weight of 2-hydroxy-2-methylpropiophenone, Component (E), 0.2 parts by weight of diethylmethoxyborane, The unsaturated polyester resin composition to which is added is referred to as Composition Example 1.
  • composition Example 2 (A) Component, 50 parts by weight of bisphenol A type vinyl ester resin, (B) component, 50 parts by weight of styrene, (C) component, 2- (1 ′ [2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate, 5 parts by weight, Component (D), 0.1 part by weight of 2-hydroxy-2-methylpropiophenone, Component (E), 0.2 parts by weight of diethylmethoxyborane, The unsaturated polyester resin composition to which is added is referred to as Composition Example 2.
  • composition Example 3 (A) Component, 30 parts by weight of bisphenol A type vinyl ester resin, (B) component, dicyclopentenyloxyethyl (meth) acrylate 70 parts by weight, (C) component, 2- (1 ′ [2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate 5 parts by weight, Component (D), 0.1 part by weight of 2-hydroxy-2-methylpropiophenone, Component (E), 0.2 parts by weight of diethylmethoxyborane, The unsaturated polyester resin composition to which is added is referred to as Composition Example 3.
  • composition example 4- (A) component, 25 parts by weight of a bisphenol A-type vinyl ester resin, (B) component, dicyclopentenyloxyethyl (meth) acrylate 75 parts by weight, (C) component, 2- (1 ′ [2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate 5 parts by weight, Component (D), 0.1 part by weight of 2-hydroxy-2-methylpropiophenone, Component (E), 0.1 parts by weight of diethylmethoxyborane, Other optional components, 0.5 parts by weight of 1,1-di (t-butylperoxy) cyclohexane, The unsaturated polyester resin composition to which is added is referred to as Composition Example 4.
  • composition Example 5 (A) component, 25 parts by weight of a bisphenol A-type vinyl ester resin, (B) component, dicyclopentenyloxyethyl (meth) acrylate 75 parts by weight, (C) component, 2- (1 ′ [2,4-dimethylpyrazonyl] carboxyamino) ethyl methacrylate 5 parts by weight, Component (D), 0.1 part by weight of 2-hydroxy-2-methylpropiophenone, Other optional components, 0.5 parts by weight of 1,1-di (t-butylperoxy) cyclohexane, The unsaturated polyester resin composition to which is added is referred to as Composition Example 5.
  • the stator 20 was cut into four equal parts to obtain test pieces.
  • the resin composition was dripped with respect to the test piece from the joining side of the coil 60 at room temperature. Then, after irradiating ultraviolet rays for 1 minute using a high pressure mercury lamp, it heated in the 120 degreeC warm air circulation thermostat.
  • the obtained test piece was cut at a location of 2 mm from the end of the coil 60 on the joining side, and the coating thickness was measured as a covering index.
  • the penetration was evaluated as ⁇ when the resin had penetrated to the core end surface on the anti-joining side after decomposition, and x when the resin did not penetrate. The evaluation results are shown in the column (1) in FIG.
  • the resin penetrated to the core end surface on the anti-joining side in all of Composition Examples 1 to 5 and Comparative Examples 1 and 2, and therefore, it was evaluated as “Good”. Subsequently, the coating thickness was 35 ⁇ m in Composition Example 1, 30 ⁇ m in Composition Example 2, 50 ⁇ m in Composition Examples 3 and 4, 45 ⁇ m in Composition Example 5, and 0 ⁇ m in Comparative Examples 1 and 2. Since component (D), which is a component that improves the coating property, is contained in composition examples 1 to 5, it is considered that there is a large difference in coating thickness between composition examples 1 to 5 and comparative examples 1 and 2. It is done.
  • Adhesiveness Using a polyamideimide-coated enameled wire (AIW) having a rectangular shape with a cross section of 3 mm ⁇ 2 mm, a Stracker-like test piece was prepared. After impregnating this test piece with the resin composition 601, it was heated in a 120 ° C. hot air circulating thermostat for 2 hours. Thereafter, a tensile fracture test was performed at 23 ° C. using an autograph DSS-5000 manufactured by Shimadzu Corporation. In the tensile fracture test, the distance between fulcrums was 150 mm, the crosshead speed was 5 mm / min, and the load when the test piece was pulled out was used as the adhesive strength. The evaluation results are shown in the column (2) of FIG.
  • the adhesive strength in Composition Examples 1 and 2 and Comparative Example 1 was 1.0 kN.
  • the adhesive strength in Composition Examples 3 to 5 was 1.1 kN.
  • the adhesive force in Comparative Example 2 was 0.8 kN.
  • Only Comparative Example 2 does not contain the component (C), which is a component that improves adhesiveness, and therefore, it is considered that only Comparative Example 2 has a lower adhesive force than Composition Examples 1 to 5 and Comparative Example 1. .
  • the component (E), which is a component for improving heat resistance, is contained in Composition Examples 1 to 4 and Comparative Example 1, it is between Composition Examples 1 to 4, Comparative Example 1, Composition Example 5 and Comparative Example 2. It is thought that there was a difference in heat resistance.
  • a member for a rotating electrical machine such as a stator or a rotor that has excellent insulation properties and excellent cooling performance despite its small size and high output. it can.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Organic Insulating Materials (AREA)
PCT/JP2014/063011 2013-07-09 2014-05-16 回転電機用部材、回転電機、および、樹脂組成物 Ceased WO2015004987A1 (ja)

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US14/902,442 US9957413B2 (en) 2013-07-09 2014-05-16 Member for dynamo-electric machine, dynamo-electric machine, and resin composition
CN201480039028.4A CN105359385B (zh) 2013-07-09 2014-05-16 旋转电机用构件、旋转电机以及树脂组合物
EP14822400.9A EP3021460B1 (en) 2013-07-09 2014-05-16 Resin composition, member for dynamo-electric machine and dynamo-electric machine

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JP2013143786A JP6057852B2 (ja) 2013-07-09 2013-07-09 回転電機用部材、回転電機、および、樹脂組成物
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JP7084126B2 (ja) * 2017-11-17 2022-06-14 トヨタ自動車株式会社 ステータの製造方法およびステータ
JP2021102748A (ja) * 2019-12-24 2021-07-15 昭和電工株式会社 コイル用ラジカル重合性ワニス
WO2025047574A1 (ja) * 2023-08-29 2025-03-06 株式会社ダイセル 硬化性エポキシ組成物

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JP3770263B2 (ja) 1999-07-12 2006-04-26 株式会社デンソー 回転電機の製造方法
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JP2002050249A (ja) * 2000-08-01 2002-02-15 Sekisui Chem Co Ltd 表面被覆線材の製造方法及び表面被覆用組成物
JP2012007081A (ja) * 2010-06-25 2012-01-12 Hitachi Ltd コイル固着用不飽和ポリエステル樹脂組成物
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EP3021460A4 (en) 2017-04-19
JP2015019457A (ja) 2015-01-29
US9957413B2 (en) 2018-05-01
JP6057852B2 (ja) 2017-01-11
EP3021460B1 (en) 2021-11-10
CN105359385B (zh) 2018-12-07
US20160376466A1 (en) 2016-12-29
EP3021460A1 (en) 2016-05-18
CN105359385A (zh) 2016-02-24

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