WO2020153426A1 - Matériau isolant pour machines dynamo-électriques, et machine dynamo-électrique - Google Patents

Matériau isolant pour machines dynamo-électriques, et machine dynamo-électrique Download PDF

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Publication number
WO2020153426A1
WO2020153426A1 PCT/JP2020/002325 JP2020002325W WO2020153426A1 WO 2020153426 A1 WO2020153426 A1 WO 2020153426A1 JP 2020002325 W JP2020002325 W JP 2020002325W WO 2020153426 A1 WO2020153426 A1 WO 2020153426A1
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WO
WIPO (PCT)
Prior art keywords
ether ketone
resin sheet
polyarylene ether
ketone resin
resin
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PCT/JP2020/002325
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English (en)
Japanese (ja)
Inventor
貴司 権田
昭紘 小泉
鈴木　和宏
Original Assignee
信越ポリマー株式会社
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Application filed by 信越ポリマー株式会社 filed Critical 信越ポリマー株式会社
Priority to JP2020568196A priority Critical patent/JP7466465B2/ja
Publication of WO2020153426A1 publication Critical patent/WO2020153426A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • 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
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Definitions

  • the present invention relates to an insulating material for a rotating electric machine and a rotating electric machine, which can maintain the insulation of a motor (electric motor) or a generator and prevent a short circuit or the like.
  • electric vehicles such as electric vehicles (EV), hybrid vehicles (HV), hybrid electric vehicles (HEV), plug-in hybrid vehicles (PHV), fuel cell vehicles (FCV), electric vehicles, or
  • a transportation system that uses a motor such as an electric locomotive as a power source is in the limelight.
  • Motors which are rotating electrical machines used in these transportation systems, are being made smaller, more powerful, and more efficient, but along with this, the trend toward higher voltage and higher current is rapidly increasing. There is. Therefore, the insulating sheet used for such a motor is required to have higher electrical characteristics and mechanical characteristics, lower water absorption, and superior heat resistance than ever before.
  • the insulating sheet used for the motor includes, for example, (1) an inner wall surface of a slot of the stator and a conductive winding housed in the slot in order to ensure insulation between the conductive winding and the core of the stator. Slot material that is manually inserted and interposed between the two (see Patent Document 1), and (2) a wedge that is attached so as to block the inlet of the core of the stator to prevent the conductive winding from falling off (see Patent Document 2). (3) In a three-phase AC motor or the like, there is an interphase insulating sheet (see Patent Document 3) interposed between conductive windings having different phases.
  • a wholly aromatic aramid resin fiber sheet manufactured by DuPont Teijin Advanced Paper Co.: product name: Nomex paper
  • insulating paper made of polyetheretherketone fiber see Patent Document 4
  • Resin fiber sheet made of polyester resin fiber sheet such as polyethylene terephthalate resin fiber or polybutylene naphthalate resin fiber, polyester film made of polyethylene terephthalate resin film or polyethylene naphthalate resin film, biaxially oriented polyphenylene
  • a polyphenylene sulfide resin film composed of a sulfide resin film see Patent Document 5
  • a non-oriented polyphenylene sulfide resin sheet see Patent Document 6
  • the insulating sheet used in the conventional motor is a sheet made of a wholly aromatic aramid resin fiber sheet, a polyether ether ketone fiber, and a polyester resin fiber sheet, which has high impregnation and slipperiness of motor oil, It can be expected to improve workability when inserting into the slot.
  • the resin fiber sheet has a high water absorption rate, electrical characteristics such as dielectric characteristics and dielectric strength are easily affected by environmental changes in temperature and humidity, and frequency dependency becomes large, which is not preferable.
  • the resin fiber sheet has through holes such as pinholes, the electrical characteristics (dielectric strength) at the locations where the through holes are formed are reduced.
  • the resin fiber sheet has pores (air bubbles) inside, a partial discharge may occur at a low voltage at the air bubble existing location.
  • polyester-based insulating sheets such as polyethylene terephthalate resin and polyethylene naphthalate resin are inferior in heat resistance and are Class E (allowable maximum temperature: 120°C) in the heat resistance category of IEC Publication 85 (1984). In the heat resistant category, it cannot be used for motors of electric vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, etc. that require Class F (allowable maximum temperature: 155°C).
  • biaxially oriented polyphenylene sulfide resin film and non-oriented polyphenylene sulfide resin film are classified into Class F (maximum allowable temperature: 155°C) and Class H (maximum allowable temperature: 180) in the heat resistance category of IEC Publication 85 (1984).
  • Class F maximum allowable temperature: 155°C
  • Class H maximum allowable temperature: 180
  • aramid fibrid and aramid short fibers are mainly heat-bonded to a aramid paper and a polyester resin film formed in a paper shape.
  • An aramid-polyester laminate (see Japanese Patent No. 46077826) obtained by the above, a laminate obtained by adhering an aramid fiber sheet or aramid fiber paper and a polyphenylenephenylene sulfide resin film without using an adhesive have been developed and proposed. (See Japanese Patent No. 4402734 and Japanese Patent Laid-Open No. 2011-140151).
  • the aramid-polyester film laminate can improve the insulating property of the aramid paper, it is difficult to use the F type because the polyester film is inferior in heat resistance. Further, since it has poor hydrolysis resistance, it cannot be said that it is suitable for use in an environment of high temperature and high humidity. Further, the polyester film also has a problem in chemical resistance.
  • a laminate composed of an aramid fiber sheet or an aramid fiber paper and a polyphenylene sulfide resin film is a non-oriented polyphenylene sulfide resin sheet, or it is possible to improve the toughness of the polyphenylene sulfide resin film, the aramid fiber sheet or Since the adhesiveness between the aramid fiber paper and the polyphenylene sulfide resin film is insufficient, delamination occurs, causing a problem in adhesiveness.
  • the present invention has been made in view of the above, it is possible to increase the occupancy rate of the conductive winding, moreover, excellent electrical insulation, low dielectric properties, high rigidity, high toughness, low water absorption, high heat resistance,
  • An object of the present invention is to provide an insulating material for a rotating electric machine and a rotating electric machine that can obtain chemical resistance and the like.
  • Polyarylene ether ketone resin also known as aromatic polyether ketone, PAEK
  • PAEK resin is a heat that has excellent electrical properties, mechanical properties, heat resistance, chemical resistance, radiation resistance, hydrolysis resistance, low water absorption, recyclability, etc. It is a plastic crystalline resin.
  • the polyarylene ether ketone resin has been proposed and used in a wide range of fields such as the automobile field, energy field, semiconductor field, medical field, and aerospace field.
  • the present invention in order to solve the above problems, it is composed of a polyarylene ether ketone resin sheet,
  • the electrical properties of the polyarylene ether ketone resin sheet are that the dielectric breakdown strength per unit thickness in silicone oil is 40 kV/mm or more, the relative dielectric constant at a frequency of 1 GHz is 3.1 or less, and the dielectric loss tangent is 0.01 or less. It is characterized by being.
  • the polyarylene ether ketone resin sheet is preferably a polyether ether ketone resin sheet.
  • the tensile elastic modulus is preferably 3000 N/mm 2 or more.
  • the maximum tensile strength is preferably 80 N/mm 2 or more, and the elongation at tensile break is preferably 80% or more.
  • the water absorption of the polyarylene ether ketone resin sheet is preferably 1.0% or less at 23°C.
  • a substantially U-shaped polyarylene ether ketone resin sheet for accommodating a conductive winding is inserted into a slot formed in at least one of a stator and a rotor of a rotating electric machine to have a thickness of 50 ⁇ m or more and 1000 ⁇ m or less.
  • the polyarylene ether ketone resin sheet may be used as an insulating wall member interposed between the slot and the conductive winding.
  • a polyarylene ether ketone resin sheet having a thickness of 50 ⁇ m or more and 1000 ⁇ m or less can be used as a partition member that partitions the inside of the wall member into a plurality of parts. Further, a polyarylene ether ketone resin sheet having a thickness of 50 ⁇ m or more and 1000 ⁇ m or less can be used as a covering member that covers the opening of the wall member.
  • the present invention is characterized in that the rotating electric machine includes the insulating material for a rotating electric machine according to any one of claims 1 to 6.
  • the polyarylene ether ketone resin sheet in the claims does not particularly need to be transparent, opaque, semi-transparent, non-stretched sheet, uniaxially stretched sheet, or biaxially stretched sheet.
  • the polyarylene ether ketone resin sheet includes both the polyarylene ether ketone resin sheet and the polyarylene ether ketone resin film.
  • the number of sheets of polyarylene ether ketone resin may be one or may be two or more.
  • a molding material containing a polyarylene ether ketone resin is melt-kneaded, and this molding material is extruded into a polyarylene ether ketone resin sheet with a die of a molding machine, and this polyarylene ether ketone resin is extruded.
  • the sheet may be cooled by contacting it with a cooling roll.
  • the rotating electric machine includes at least various motors (electric motors) and generators.
  • the slots may be recessed in the stator or rotor of the rotating electric machine, or may be recessed in the stator and the rotor, respectively.
  • the thickness of the insulating material when a polyarylene ether ketone resin sheet having excellent electric characteristics is selected and the thickness thereof is 50 ⁇ m or more and 1000 ⁇ m or less, it is possible to reduce the thickness of the insulating material and reduce the occupation ratio of the conductive winding. Can be increased.
  • the polyarylene ether ketone resin sheet as an insulating material has a low water absorption rate, electrical characteristics such as dielectric characteristics and dielectric strength are less susceptible to environmental changes such as temperature and humidity, and prevent frequency dependence from increasing. be able to.
  • the polyarylene ether ketone resin sheet which is an insulating material, has excellent electrical insulation properties, it is possible to suppress deterioration of electrical characteristics and reduce the risk of partial discharge at a low voltage.
  • the polyarylene ether ketone resin sheet is excellent in heat resistance and recyclability, it can be used for rotating electric machines such as electric vehicles, hybrid vehicles, plug-in hybrid vehicles, and fuel cell vehicles. Further, since the polyarylene ether ketone resin sheet is also excellent in mechanical properties, even if it is inserted into the slot of the rotating electric machine as a wall member, breakage, cracking, tearing of the wall member can be suppressed.
  • a polyarylene ether ketone resin sheet is adopted as an insulating material for a rotating electric machine, it has excellent electrical properties, mechanical properties, heat resistance, chemical resistance, radiation resistance, hydrolysis resistance, and low water absorption. There is an effect that recyclability and the like can be obtained.
  • the electrical properties of the polyarylene ether ketone resin sheet are such that the dielectric breakdown strength, which is the dielectric breakdown voltage per unit thickness in silicone oil, is 40 kV/mm or more, the relative dielectric constant at a frequency of 1 GHz is 3.1 or less, and the dielectric Since the tangent is 0.01 or less, dielectric breakdown due to surge voltage and thermal decomposition of the polyarylene ether ketone resin sheet due to self-heating are prevented, and high current and high voltage of the rotating electric machine can be easily realized.
  • the dielectric breakdown strength which is the dielectric breakdown voltage per unit thickness in silicone oil
  • the relative dielectric constant at a frequency of 1 GHz is 3.1 or less
  • the dielectric Since the tangent is 0.01 or less, dielectric breakdown due to surge voltage and thermal decomposition of the polyarylene ether ketone resin sheet due to self-heating are prevented, and high current and high voltage of the rotating electric machine can be easily realized.
  • the polyarylene ether ketone resin sheet is a polyether ether ketone resin sheet
  • the moldability and availability of the resin sheet can be improved, and the manufacturing cost can be reduced.
  • the tensile elastic modulus of the polyarylene ether ketone resin sheet is 3000 N/mm 2 or more, excellent rigidity can be obtained. Therefore, when the polyarylene ether ketone resin sheet is inserted into the slot of the rotating electric machine as an insulating material, it is possible to prevent the polyarylene ether ketone resin sheet from buckling and improve the maintainability of the rotating electric machine.
  • the maximum tensile strength of the polyarylene ether ketone resin sheet is 80 N/mm 2 or more and the elongation at tensile break is 80% or more, excellent toughness can be obtained. Therefore, when the polyarylene ether ketone resin sheet is inserted into the slot of the rotating electric machine as an insulating material, the polyarylene ether ketone resin sheet can be expected to prevent breakage, cracking, tearing, etc., and the maintainability of the rotating electric machine can be improved. It will be possible.
  • the water absorption of the polyarylene ether ketone resin sheet at 23° C. is 1.0% or less, excellent electrical characteristics can be obtained even when the rotating electric machine is used in a high humidity environment. It is possible to maintain.
  • the polyarylene ether ketone resin sheet having a thickness of 50 ⁇ m or more and 1000 ⁇ m or less is formed into at least a substantially U-shape to form a wall member interposed between the slot and the conductive winding,
  • the effect that the occupancy rate of the conductive winding can be increased and excellent electrical insulation, low dielectric properties, high rigidity, high toughness, low water absorption, high heat resistance, chemical resistance, etc. can be obtained There is.
  • the insulating material for a rotary electric machine has a plurality of slots 5 in a stator 3 of the rotary electric machine 1.
  • 11 is a wall member 14 interposed between the slot 5 and the plurality of conductive windings 7.
  • the rotating electric machine 1 is composed of, for example, a motor 2 for an electric vehicle or a hybrid vehicle, and a stator 3 that surrounds and rotates a rotor is installed on the inner periphery of a housing.
  • the stator 3 includes a cylindrical core 4 fitted into a rotatable rotor and a plurality of conductive windings 7 housed in the core 4, and has an inner peripheral surface of the core 4 facing the rotor.
  • a plurality of slots 5 are lined up in a line in the circumferential direction to form a recess, and a plurality of conductive windings 7 for generating a magnetic field are respectively wound in the plurality of slots 5 and indirectly accommodated therein.
  • the core 4 of the stator 3 is formed by laminating iron cores made of a plurality of silicon steel plates or the like or integrally formed from the viewpoint of reducing the effect of eddy current.
  • each slot 5 is formed in a recess so as to draw a substantially U-shape, the opening 6 thereof is directed toward the center of the core 4, and the bottom is formed into a flat surface or a curved surface.
  • the opening 6 of the slot 5 is formed to have a width narrower than that of the bottom, if necessary, to prevent the polyarylene ether ketone resin sheet 11 as the insulating material 10 from popping out or falling off.
  • a round copper wire wound in distributed winding is mainly used for each conductive winding 7, but a rectangular copper wire having a rectangular cross section (square shape) is used in order to improve winding density.
  • the polyarylene ether ketone resin sheet 11 which is the insulating material 10 is bent and formed into a substantially flat U-shape having flexibility and is detachably inserted into the slot 5.
  • the opening 12 is directed toward the center of the core 4 and directly accommodates the plurality of conductive windings 7.
  • a polyarylene ether ketone resin sheet 11 is used as the insulating material 10. This is because the adoption of the polyarylene ether ketone resin sheet 11 makes it possible to obtain electrical characteristics, mechanical characteristics, heat resistance, chemical resistance, radiation resistance, and resistance to radiation. This is because it is possible to improve the hydrolyzability, low water absorption, recyclability and the like.
  • the upper and lower end portions 13 of the polyarylene ether ketone resin sheet 11 in FIG. 2 are folded back to the outside, respectively, and engage with the peripheral portions of the slots 5 on the front and back surfaces of the core 4 to prevent displacement and dropout.
  • Such a polyarylene ether ketone resin sheet 11 is fitted and positioned in the slot 5 of the core 4 and accommodates a plurality of conductive windings 7.
  • the inner surface of the slot 5 and a plurality of conductive windings 7 are accommodated. It intervenes as a wall member 14 between the winding 7 and the winding 7, and functions to separate the slot 5 and the plurality of conductive windings 7 from each other to ensure insulation therebetween.
  • polyarylene ether ketone resin sheet 11 examples include polyetherketone (PEK) resin sheet, polyetheretherketone (PEEK) resin sheet, polyetherketoneketone (PEKK) resin sheet, and polyetheretherketoneketone (PEEKK). Examples thereof include a resin sheet and a polyetherketone etherketoneketone (PEKEKK) resin sheet. Any of these resin sheets can be used as the insulating material 10, but the polyether ether ketone resin sheet is most suitable from the viewpoints of easy availability, easy molding, manufacturing cost, and the like.
  • the electrical characteristics (electrical insulation) of the polyarylene ether ketone resin sheet 11 are such that the dielectric breakdown voltage in the silicone oil is 7 kV or more per unit thickness of the silicone oil in order to realize high current and high voltage of the rotating electric machine 1. It is preferable that the dielectric breakdown strength, which is the dielectric breakdown voltage, is 40 kV/mm or more, the relative dielectric constant at a frequency of 1 GHz is 3.1 or less, and the dielectric loss tangent is 0.01 or less.
  • the mechanical properties of the polyarylene ether ketone resin sheet 11 are 3000 N/mm 2 or more in tensile elastic modulus, 80 N/mm 2 or more in tensile maximum strength, and 80% or more in elongation at break in order to improve rigidity and toughness. Is preferred.
  • the water absorption rate at 23° C. is preferably 1.0% or less from the viewpoint of maintaining excellent electrical characteristics even in a high humidity environment.
  • the thickness is preferably 50 ⁇ m or more and 1000 ⁇ m or less from the viewpoint of increasing the occupancy rate of the conductive winding 7 while preventing the electrical insulation of the polyarylene ether ketone resin sheet 11 from being lowered.
  • the relative crystallinity of the polyarylene ether ketone resin sheet 11 is 80% or more, preferably 90% or more, more preferably 95% or more, and further preferably 100%. This is because when the relative crystallinity of the polyarylene ether ketone resin sheet 11 is less than 80%, the heat resistance is insufficient, so that the wall member 14 is deformed or cracked by the heat generated by the motor 2. Or, it causes a change in dimensions. Further, the tensile modulus of elasticity of the polyarylene ether ketone resin sheet 11 is low and the rigidity thereof is insufficient, so that when the wall member 14 is inserted into the slot 5 of the core 4, there is a risk of buckling.
  • Crystallization of the polyarylene ether ketone resin sheet 11 can be represented by relative crystallinity.
  • the glass transition point of the polyarylene ether ketone resin sheet 11 is 140° C. or higher, preferably 145° C. or higher, more preferably 150° C. or higher, still more preferably 155° C. or higher, from the viewpoint of maintaining heat resistance.
  • the upper limit of the glass transition point of the polyarylene ether ketone resin sheet 11 is not particularly limited, but is practically 180° C. or lower. This is because when the glass transition temperature exceeds 180° C., when extrusion molding the polyarylene ether ketone resin sheet 11, the extrusion molding temperature exceeds 450° C., so special equipment is required for the extrusion molding equipment, resulting in high cost. Because it invites. Moreover, the usable extruder is limited.
  • the glass transition point of the polyarylene ether ketone resin sheet 11 is the peak temperature of the loss elastic modulus (E′′) curve in the temperature change of the dynamic viscoelasticity measurement.
  • the peak temperature of the loss elastic modulus (E′′) of the polyarylene ether ketone resin sheet 11 is in the above range in the extrusion direction and the width direction (direction perpendicular to the extrusion direction).
  • the polyarylene ether ketone resin which is the molding material M for the polyarylene ether ketone resin sheet 11, is a crystalline resin composed of an arylene group, an ether group, and a carbonyl group.
  • a polyether ether ketone resin having a chemical structural formula represented by the chemical formula (1) and a polyether having a chemical structure represented by the chemical formula (2).
  • Ketone (PEK) resin polyetherketoneketone (PEKK) resin having the chemical structure represented by the chemical formula (3), polyetheretherketoneketone (PEEKK) resin having the chemical structure represented by the chemical formula (4), or Examples thereof include polyetherketoneetherketoneketone (PEKEKK) resin having a chemical structure represented by the chemical formula (5).
  • the polyarylene ether ketone resin may be used alone or in combination of two or more. Further, the polyarylene ether ketone resin may be a copolymer having two or more chemical structures represented by the chemical formulas (1) to (5).
  • the polyarylene ether ketone resin is usually used in a form suitable for molding such as powder, granules and pellets. Among these polyarylene ether ketone resins, polyether ether ketone resin and polyether ketone ketone resin are preferable from the viewpoint of moldability of the resin sheet. More preferably, a polyether ether ketone resin is most suitable from the viewpoint of easy availability and cost.
  • polyetheretherketone resin examples include the Victrex Powder series, the Victrex Granules series (manufactured by Victor Trek: product name), the Vestakeep series [manufactured by Daicel-Evonik: product name], the KetaSpire PEEK series [Solvay Specialty Polymers, Inc.] Made: product name].
  • polyetherketoneketone resin examples include KEPSTAN series [manufactured by Arkema: product name].
  • the molding material M contains at least a polyarylene ether ketone resin.
  • a polyimide (PI) resin a polyamide imide (PAI) resin
  • Polyimide resin such as polyetherimide (PEI) resin, polyamide 4T (PA4T) resin, polyamide 6T (PA6T) resin, modified polyamide 6T (modified PA6T) resin, polyamide 9T (PA9T) resin, polyamide 10T (PA10T) resin, polyamide Polyamide resins such as 11T (PA11T) resin, polyamide 6 (PA6) resin, polyamide 66 (PA66) resin, polyamide 46 (PA46) resin, polysulfone (PSU) resin, polyether sulfone (PES) resin, polyphenylene sulfone (Polsulfone resin such as PPSU resin, polyphenylene sulfide (PPS) resin, polyphenylene sulfone
  • the molding material M includes, in addition to the above-mentioned resins, an antioxidant, a light stabilizer, an ultraviolet absorber, a plasticizer, a lubricant, a flame retardant, an antistatic agent, a heat resistance improver, as long as the characteristics of the present invention are not impaired. , Inorganic compounds, organic compounds, etc. are selectively added.
  • the polyarylene ether ketone resin sheet 11 is manufactured into a resin sheet having a thickness of 50 ⁇ m or more and 1000 ⁇ m or less.
  • the polyarylene ether ketone resin sheet 11 can be manufactured by a known manufacturing method such as a melt extrusion molding method, a calender molding method, or a casting method, but from the viewpoint of handleability and simplification of equipment, the melt extrusion molding method is used. It is preferable that extrusion molding is performed continuously.
  • melt extrusion molding method is, as shown in FIG. 5, melt-kneading the molding material M using the melt extrusion molding machine 20 of the manufacturing apparatus, and from the T die 23 of the melt extrusion molding machine 20 to the polyarylene ether.
  • This is a method of continuously extruding the ketone resin sheet 11.
  • the apparatus for producing the polyarylene ether ketone resin sheet 11 is not particularly limited, but is an apparatus for producing the polyarylene ether ketone resin sheet 11 using the molding material M containing the polyarylene ether ketone resin, A melt extrusion molding machine 20 for melting and kneading the molding material M, a T die 23 mounted on the melt extrusion molding machine 20 for extruding the polyarylene ether ketone resin sheet 11, and a polyarylene ether ketone extruded from the T die 23.
  • a cooling roll 26 that cools the resin sheet 11, a pair of pressure-bonding rolls 27 that comes into contact with the polyarylene ether ketone resin sheet 11 extruded from the T die 23 and presses against the cooling roll 26, and a poly roll that is cooled by the cooling roll 26.
  • a winding machine 28 for winding the arylene ether ketone resin sheet 11 is provided.
  • the melt extrusion molding machine 20 is composed of, for example, a single-screw extrusion molding machine or a twin-screw extrusion molding machine, and functions to melt-knead the input molding material M.
  • a raw material inlet 21 for the molding material M is installed in the upper rear of the melt extruder 20.
  • the raw material inlet 21 has helium gas, neon gas, argon gas, krypton gas, nitrogen gas, carbon dioxide gas.
  • An inert gas supply pipe 22 for supplying such an inert gas (see the arrow in FIG. 5) as necessary is connected, and the flow of the inert gas through the inert gas supply pipe 22 causes the molding material M Oxidative deterioration and oxygen crosslinking are effectively prevented.
  • the temperature of the polyarylene ether ketone resin during the melt-kneading of the melt extruder 20 is not particularly limited as long as it is a temperature at which the polyarylene ether ketone resin can be melted and the polyarylene ether ketone resin does not decompose. It is preferable that the temperature is not lower than the melting point of the polyarylene ether ketone resin and lower than the thermal decomposition temperature of the polyarylene ether ketone resin.
  • the range of 320°C or higher and 450°C or lower, preferably 360°C or higher and 420°C or lower, and more preferably 380°C or higher and 400°C or lower is good. This is because when the melting point of the poly(arylene ether ketone) resin is lower than that, the molding material M containing the poly(arylene ether ketone) resin cannot be melt-extruded. This is based on the reason that the ketone resin may be decomposed violently.
  • the T-die 23 is attached to the front end of the melt extrusion molding machine 20 via a connecting pipe 24, and the molten molding material M is molded into a strip-shaped polyarylene ether ketone resin sheet 11 and continuously extruded downward. Function.
  • a gear pump 25 mounted on the connecting pipe 24 is located upstream of the T die 23, and the gear pump 25 transfers the molding material M to the T die 23 at a constant speed and with high accuracy.
  • a filter (not shown) is selectively installed between the T-die 23 and the gear pump 25 for the purpose of separating the gel or foreign matter of the molten molding material M.
  • the temperature at the time of extruding the T-die 23 is not less than the melting point of the polyarylene ether ketone resin and less than the thermal decomposition temperature of the polyarylene ether ketone resin, specifically 320°C or more and 450°C or less, preferably 360°C or more and 420°C or less, More preferably, it is adjusted in the range of 380° C. or higher and 400° C. or lower. This is because when the melting point of the polyarylene ether ketone resin is lower than that of the polyarylene ether ketone resin, melt extrusion molding of the molding material M containing the polyarylene ether ketone resin becomes difficult. On the basis that there is a risk of severe decomposition.
  • the cooling roll 26 is made of, for example, a metal roll having a diameter larger than that of the pair of pressure bonding rolls 27, and the polyarylene ether ketone resin sheet 11 rotatably supported below the T die 23 and extruded is used as the pressure bonding roll 27.
  • the polyarylene ether ketone resin sheet 11 is sandwiched between them and the thickness thereof is controlled within a predetermined range while cooling the polyarylene ether ketone resin sheet 11 together with the pressure bonding roll 27 in a short time.
  • the cooling roll 26, like the pair of pressure-bonding rolls 27, has a glass transition point of +20° C. or higher of the polyarylene ether ketone resin sheet 11 and is lower than the melting point of the polyarylene ether ketone resin sheet 11, preferably the polyarylene ether ketone resin sheet 11.
  • the temperature of the cooling roll 26 is adjusted to a temperature range of [glass transition point+20° C.] or higher of the polyarylene ether ketone resin sheet 11 and lower than the melting point of the polyarylene ether ketone resin sheet 11 in the polyarylene ether ketone resin sheet 11. This is because the relative crystallinity is adjusted to 80% or more.
  • the relative crystallinity of the polyarylene ether ketone resin sheet 11 is less than 80%.
  • the heat generated by the motor 2 may cause the wall member 14 to be deformed, cracked, or change in dimension.
  • the tensile modulus of elasticity of the polyarylene ether ketone resin sheet 11 is small and the rigidity is insufficient, when the wall member 14 is inserted into the slot 5 of the stator 3, there is a risk of buckling.
  • the polyarylene ether ketone resin sheet 11 adheres to the cooling roll 26 during the production of the polyarylene ether ketone resin sheet 11. There is a risk of breakage.
  • the method for adjusting the temperature of the cooling roll 26 and the cooling method are not particularly limited, but for example, a method using a heat medium such as air, water, oil, or a method such as an electric heater or dielectric heating is applicable.
  • the pair of pressure bonding rolls 27 are rotatably supported below the T die 23 so as to sandwich the cooling roll 26. Between the pair of pressure-bonding rolls 27 and the winding tube 29 of the winder 28 located downstream thereof, at least the slit blade 30 forming a slit on the side of the polyarylene ether ketone resin sheet 11 can be moved up and down. Between the slit blade 30 and the winder 28, tension rolls 31 for applying tension to the polyarylene ether ketone resin sheet 11 to smoothly wind it are rotatably supported by a required number of shafts. ..
  • the pressure-bonding roll 27 a metal elastic roll having a metal surface is used as necessary.
  • the polyarylene ether ketone resin sheet 11 having an excellent surface smoothness can be formed.
  • Specific examples of the metal elastic roll include a metal sleeve roll, an air roll [manufactured by Dimco: product name], and a UF roll [manufactured by Hitachi Zosen: product name].
  • the pair of pressure-bonding rolls 27 have a glass transition point of +20° C. or higher of the polyarylene ether ketone resin sheet 11 and a melting point lower than that of the polyarylene ether ketone resin sheet 11, preferably a polyarylene ether ketone resin.
  • the reason why the temperature of the pressure bonding roll 27 is adjusted to the temperature range concerned is that the relative crystallization of the polyarylene ether ketone resin sheet 11 is adjusted to 80% or more. That is, when the temperature of the pressure bonding roll 27 is less than [glass transition point+20° C.] of the polyarylene ether ketone resin sheet 11, the relative crystallinity of the polyarylene ether ketone resin sheet 11 becomes less than 80%, The generated heat causes the wall member 14 to deform, crack, or change in size. Further, the rigidity of the polyarylene ether ketone resin sheet 11 becomes insufficient, and when it is inserted into the slot 5 of the core 4, there is a risk of buckling.
  • the temperature adjustment and cooling method of the pressure bonding roll 27 are not limited, and examples thereof include a method using a heat medium such as air, water, oil, or an electric heater or dielectric heating.
  • the molding material M is charged into the raw material charging port 21 of the melt extrusion molding machine 20 and the molding material M is melt-kneaded. Then, the polyarylene ether ketone resin sheet 11 is continuously extruded into a strip shape from the T die 23. At this time, the water content of the polyarylene ether ketone resin before melt-kneading is adjusted to 2000 ppm or less, preferably 1000 ppm or less, more preferably 500 ppm or less, and further preferably 300 ppm or less.
  • the polyarylene ether ketone resin before melt-kneading exceeds 2000 ppm, the polyarylene ether ketone resin may foam.
  • the lower limit of the water content of the polyarylene ether ketone resin before melt-kneading is not particularly limited, but 100 ppm or more is preferable.
  • the polyarylene ether ketone resin sheet 11 After the polyarylene ether ketone resin sheet 11 is extruded, the polyarylene ether ketone resin sheet 11 is sequentially wound around the cooling roll 26, the pair of pressure bonding rolls 27, the tension roll 31, and the winding pipe 29 of the winder 28, and the polyarylene ether ketone resin sheet 11 is cooled.
  • both sides of the polyarylene ether ketone resin sheet 11 are cut with slit blades 30 to form a proper appearance, and the polyarylene ether ketone resin sheet 11 is sequentially wound around a winding tube 29 of a winding machine 28.
  • the polyarylene ether resin sheet for the rotary electric machine 1 can be manufactured.
  • the relative crystallinity and the storage elastic modulus (E′) of the polyarylene ether ketone resin sheet 11 can be adjusted by immediately cooling the polyarylene ether ketone resin sheet 11 extruded from the T die 23. it can. Further, as a method of closely contacting the polyarylene ether ketone resin sheet 11 with the cooling roll 26, from the viewpoint of handling property and simplification of equipment, the polyarylene ether ketone resin sheet 11 is pressed against the cooling roll 26 by the pressure bonding roll 27. It is preferable to adopt a touch roll method of bringing them into close contact.
  • the adhesion time between the polyarylene ether ketone resin sheet 11 and the cooling roll 26 is not particularly limited, but from the viewpoint of instantaneously cooling the polyarylene ether ketone resin sheet 11, 0.1 seconds or more and 120 seconds or less. Optimally, 0.5 second or more and 60 seconds or less, more preferably 1 second or more and 30 seconds or less.
  • the surface of the polyarylene ether ketone resin sheet 11 may be left as it is, but fine irregularities can be formed within the range where the effect of the present invention is not lost, and the friction coefficient of the surface can be reduced.
  • a polyarylene ether ketone resin is melt-kneaded by a melt extrusion molding machine 20, and the melt-kneaded polyarylene ether ketone resin is finely irregularized from the T die 23 on the peripheral surface.
  • a method in which the polyarylene ether ketone resin sheet 11 is discharged and closely adhered onto the cooling roll 26 provided, and the polyarylene ether ketone resin sheet 11 is sandwiched between it and the pressure roll 27 to form fine irregularities.
  • an inorganic compound such as zirconia, glass, stainless steel, etc.
  • a polycarbonate resin such as polyethylene glycol dimethacrylate resin
  • a polyamide resin such as a plant seed
  • organic compound such as a plant seed
  • the method (1) is most suitable from the viewpoints of simplification of equipment, accuracy of unevenness size, uniformization of unevenness, facilitation of unevenness formation, and continuous formation of unevenness. ..
  • the method of forming (1) will be described in more detail.
  • (1-1) The polyarylene ether ketone resin is discharged from the T-die 23 of the melt extrusion molding machine 20 onto a cooling roll 26 having fine irregularities on its peripheral surface.
  • a method in which this discharge is sandwiched between a cooling roll 26 and a pressure-bonding roll 27 having fine irregularities on its peripheral surface, and is simultaneously molded with the melt extrusion molding of the polyarylene ether ketone resin sheet 11, (1-2) Molded poly
  • the method of forming (1-1) is most suitable from the viewpoint of simplification of equipment.
  • the dielectric breakdown voltage of the produced polyarylene ether ketone resin sheet in silicone oil is 7 kV or more, preferably 9 kV or more, and more preferably 10 kV or more.
  • the produced polyarylene ether ketone resin sheet 11 has a dielectric breakdown strength, which is a dielectric breakdown voltage per unit thickness in silicone oil, of 40 kV/mm or more, preferably 50 kV/mm or more, and more preferably Is preferably 60 kV/mm or more and 400 kV/mm or less.
  • the relative permittivity of the polyarylene ether ketone resin sheet 11 at a frequency of 1 GHz at 23° C. is 3.1 or less, preferably 3.05 or less, but practically 1.5 or more and 3.1 or less. This is because when the relative permittivity of the polyarylene ether ketone resin sheet 11 at a frequency of 1 GHz exceeds 3.1, the partial discharge inception voltage, which is an initial phenomenon of dielectric breakdown, cannot be sufficiently increased. This is because it becomes difficult to prevent dielectric breakdown.
  • the dielectric loss tangent of the polyarylene ether ketone resin sheet 11 at a frequency of 1 GHz at 23° C. is 0.01 or less, preferably 0.007 or less, more preferably 0.005 or less, and further preferably 0.003 or less. .. This is because if the dielectric loss tangent at 1 GHz is 0.01 or less, it is possible to prevent the polyarylene ether ketone resin sheet 11 from melting and thermally decomposing due to self-heating. .. Although the lower limit of this dielectric loss tangent is not limited, it is practically 0.0001 or more.
  • the maximum tensile strength of the polyarylene ether ketone resin sheet 11 is 80 N/mm 2 or more, preferably 90 N/mm 2 or more, more preferably 100 N/mm 2 or more.
  • the elongation at tensile break is 80% or more, preferably 100% or more, more preferably 200% or more. This is because when the maximum tensile strength is less than 80 N/mm 2 and the elongation at break is less than 80%, the polyetheretherketone resin sheet does not have sufficient toughness, so that it is inserted into the slot 5 as the wall member 14. When doing so, problems such as breakage, cracking, and tearing may occur.
  • the water absorption rate of the polyarylene ether ketone resin sheet 11 is 1.0% or less at a temperature of 23° C., preferably 0.7% or less, more preferably 0.5% or less. This is because when the water absorption rate at 23° C. is 1.0% or less, high electrical insulation can be maintained even in a high temperature and humidity environment.
  • the water absorption at 23° C. of the polyarylene ether ketone resin sheet 11 is preferably as low as possible, but is practically 0% or more.
  • the thickness of the polyarylene ether ketone resin sheet 11 is changed depending on the size of the core 4, the shape of the slot 5, and the like, but is 50 ⁇ m or more and 1000 ⁇ m or less, preferably 100 ⁇ m or more and 750 ⁇ m or less, more preferably 125 ⁇ m or more and 500 ⁇ m or less, and further preferably Is preferably 150 ⁇ m or more and 300 ⁇ m or less. This is because when the thickness of the polyarylene ether ketone resin sheet 11 is less than 50 ⁇ m, sufficient electric insulation cannot be obtained, and conversely, when the thickness of the polyarylene ether ketone resin sheet 11 exceeds 1000 ⁇ m. This is because the occupancy of the conductive winding 7 in the slot 5 is reduced, which causes a problem in downsizing and high output of the motor 2.
  • the insulating material 10 is not the resin fiber sheet but the polyarylene ether ketone resin sheet 11 having excellent electric characteristics, and the thickness thereof is 50 ⁇ m or more and 1000 ⁇ m or less, so that the thickness can be reduced, and the conductivity can be reduced.
  • the occupancy of the winding 7 can be increased.
  • the polyarylene ether ketone resin sheet 11 has a low water absorption rate, the electrical insulation properties such as dielectric characteristics and dielectric strength are not easily affected by environmental changes such as temperature and humidity, and the frequency dependence is effectively increased. Can be prevented.
  • the polyarylene ether ketone resin sheet 11 is excellent in electric insulation, it is possible to suppress deterioration of electric characteristics and effectively eliminate the possibility of partial discharge at low voltage. Further, since the polyarylene ether ketone resin sheet 11 has excellent heat resistance and chemical resistance, it can be used for insulating the motor 2 of electric vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles and the like. ..
  • the polyarylene ether ketone resin sheet 11 has excellent mechanical properties, even if the polyarylene ether ketone resin sheet 11 is inserted into the slot 5 of the core 4 as the wall member 14, prevention of breakage, cracking, tearing, etc. of the wall member 14 can be greatly expected. Furthermore, since the polyarylene ether ketone resin sheet 11 has excellent slidability, it can contribute to the automation of the work of inserting the wall member 14 into the slot 5 of the core 4, and in this case, compared with the manual work. You can expect a great reduction in time.
  • FIG. 6 shows a second embodiment of the present invention.
  • the insulating material 10 is a polyarylene ether ketone resin sheet 11 having a thickness of 50 ⁇ m or more and 1000 ⁇ m or less.
  • the resin sheet 11 is used not only as the wall member 14 but also as a partition member 15 that partitions the inside of the wall member 14 into a plurality of parts, and as a covering member 16 that fits and covers the opening 12 of the wall member 14. .
  • the partition member 15 is formed in a dish shape in cross section and is attached to the inside of the wall member 14 in a required number to provide insulation between the phases of the conductive winding 7 as interphase insulating paper. Function to secure.
  • the covering member 16 is formed, for example, in a dish shape in cross section, and prevents the conductive winding 7 from jumping out from the inside of the wall member 14.
  • the same effect as the above embodiment can be expected, and moreover, the conductive winding 7 projects from the inside of the wall member 14 while ensuring the insulation between the phases of the polyphase coil and maintaining the electrical insulation. It is clear that this can be prevented.
  • the plurality of slots 5 are formed in the stator 3 of the rotating electric machine 1 in the above embodiment, the plurality of slots 5 are formed in the rotor of the rotating electric machine 1 and the polyarylene ether of the insulating material 10 is formed in each slot 5.
  • the ketone resin sheet 11 may be inserted.
  • the polyarylene ether ketone resin sheet 11 is merely shown in the above-mentioned embodiment, the present invention is not limited thereto.
  • a resin fiber sheet may be laminated and adhered to one side or both sides of the polyarylene ether ketone resin sheet 11. good.
  • a pair of upper and lower resin fiber sheets can be provided in a multilayer structure on both front and back surfaces of the polyarylene ether ketone resin sheet 11.
  • the resin fiber sheet in this case include a crystalline thermoplastic resin having a melting point of 250° C. or higher, and an amorphous thermoplastic resin or a thermosetting resin sheet having a glass transition point of 200° C. or higher.
  • the crystalline thermoplastic resin having a melting point of 250° C. are preferably polyimide (PI) resin, polyamide 4T (PA4T) resin, polyamide 6T (PA6T) resin, modified polyamide 6T (modified PA6T) resin, polyamide 9T( PA9T) resin, semi-aromatic polyamide resin such as polyamide 10T (PA10T) resin, polyphenylene sulfide (PPS) resin, polyphenylene sulfide ketone resin, polyphenylene sulfide sulfone resin, polyphenylene sulfide ketone sulfone resin and other polyarylene sulfide resin, polyether ketone Polyarylene ether such as (PEK) resin, polyether ether ketone (PEEK) resin, polyether ketone ketone (PEKK) resin, polyether ether ketone ketone (PEEKK) resin, or polyether ketone ether ketone ketone (PEKEKK)
  • amorphous thermoplastic resin having a glass transition point of 200° C. or higher include polyimide resins such as polyetherimide (PEI) resin, polysulfone (PSU) resin, polyethersulfone (PES) resin, and polyphenylenesulfone.
  • polyimide resins such as polyetherimide (PEI) resin, polysulfone (PSU) resin, polyethersulfone (PES) resin, and polyphenylenesulfone.
  • PSU polysulfone
  • PES polyethersulfone
  • PAR polyarylate
  • thermosetting resin examples include polyimide resin, polyimide resin such as polyamide-imide (PI) resin, epoxy resin, phenol resin, silicone resin, wholly aromatic aramid resin, and the like.
  • PI polyamide-imide
  • a crystalline thermoplastic resin or a thermosetting resin is preferable from the viewpoint of chemical resistance. More preferably, a polyarylene ether ketone resin is preferable in order to improve adhesion with the polyarylene ether ketone resin, and further preferably, a polyether ether ketone resin is most preferable in terms of easy availability and cost.
  • Example 1 In order to manufacture an insulating material for a motor, as a polyarylene ether ketone resin, a commercially available polyether ether ketone resin [Product name: Keta Spire PEEK KT-851NL SP (hereinafter, referred to as "KT-851NL SP was abbreviated as "]. This polyether ether ketone resin was dried for 12 hours or more by a dehumidifying hot air dryer heated to 160°C.
  • the polyetheretherketone resin After drying the polyetheretherketone resin, confirm that the water content of the dried polyetheretherketone resin is 300 ppm or less, and uniaxially melt the polyetheretherketone resin with a T die with a width of 900 mm to a diameter of 40 mm. It is set in an extruder and melt-kneaded, and the melt-kneaded polyether ether ketone resin is continuously extruded from the T-die of the single-screw melt extruder to obtain a resin sheet made of polyether ether ketone resin as an insulating material. It was formed into a strip shape.
  • the water content of the polyether ether ketone resin was measured by the Karl Fischer titration method using a trace moisture analyzer [Product name: CA-100 type manufactured by Mitsubishi Chemical Corporation].
  • the temperature of the single-screw melt extruder was adjusted to 380-400°C
  • the temperature of the T-die was 400°C
  • the temperature of the connecting pipe connecting these single-screw extruder and the T-die was adjusted to 400°C.
  • the resin temperature at the inlet of the T die was measured, and it was 397° C. when measured.
  • nitrogen gas was supplied at 18 L/min through the inert gas supply pipe.
  • both ends of the continuous resin sheet made of polyetheretherketone resin are cut by slit blades and sequentially wound on the winding tube of the winder, A resin sheet having a width of 100 m and a width of 650 mm was manufactured.
  • the resin sheet was sequentially wound around a 210° C. cooling roll having irregularities on its peripheral surface, a pair of silicone rubber pressure bonding rolls, and a 6-inch winding tube located downstream of these, to form a cooling roll. And sandwiched it between the pressure rolls.
  • the surface temperature of the pressure-bonding roll was measured by a non-contact type thermometer and found to be 216° C.
  • the long-term heat resistance of the resin sheet was evaluated by placing the resin sheet in a hot air oven heated to 200° C. and leaving it to stand for 1000 hours, and then measuring the mechanical and electrical properties before and after standing.
  • Mechanical properties were evaluated by tensile maximum strength, tensile elongation at break, and tensile elastic modulus.
  • the electrical characteristics were evaluated by the dielectric breakdown voltage, the dielectric breakdown strength, the relative dielectric constant, and the dielectric loss tangent.
  • the sheet thickness of the resin sheet was measured using a micrometer [Product name: coolant proof micrometer, MDC-25PJ manufactured by Mitutoyo Corporation].
  • the polyarylene ether ketone resin sheet was measured at 10 arbitrary points in the width direction (direction perpendicular to the extrusion direction), and the average value thereof was taken as the sheet thickness.
  • the water absorption of the resin sheet was measured according to JIS K 7209 A method.
  • the immersion time was 24 hours.
  • the measurement used three test pieces, and made the average value of the measured value the water absorption.
  • Relative crystallinity (%) ⁇ 1-( ⁇ Hc/ ⁇ Hm) ⁇ 100
  • ⁇ Hc represents the amount of heat (J/g) of the recrystallization peak of the resin sheet under the temperature rising condition of 10° C./min
  • ⁇ Hm represents the crystal of the resin sheet under the temperature rising condition of 10° C./min. Represents the calorific value (J/g) of the melting peak.
  • the mechanical properties of the resin sheet were evaluated by the maximum tensile strength at 23°C, the elongation at tensile break, and the tensile elastic modulus. The mechanical properties were measured in the extrusion direction and the width direction (direction perpendicular to the extrusion direction). The measurement was based on JISK 7127, and was performed under the conditions of a tensile speed of 50 mm/min, a temperature of 23° C. ⁇ 2° C., and a relative humidity of 50 RH ⁇ 5% RH.
  • the maximum tensile strength, the elongation at break, and the tensile elastic modulus were measured 5 times, and the average values were taken as the maximum tensile strength, the elongation at break, and the tensile elastic modulus.
  • the dielectric breakdown voltage and the dielectric breakdown strength of the resin sheet in silicone oil at a temperature of 23°C and 200°C were measured in accordance with IEC 60243-1. Specifically, in a silicone oil by a temperature raising method (short-time method), an alternating current (50 Hz), a temperature of 23° C. ⁇ 2° C. and 200° C., an electrode shape is an upper electrode ⁇ 25 mm, a height 25 mm columnar shape, and a base. The lower electrode ⁇ 25 mm and the height 25 mm were measured in a cylindrical shape. The breakdown voltage was measured 5 times, and the average value was used as the breakdown voltage. Further, the pressurizing rate is shown in Table 2.
  • ⁇ Dielectric breakdown strength is the value obtained by measuring the sheet thickness at the point where the dielectric breakdown voltage is measured in advance before measuring the dielectric breakdown voltage, measuring the dielectric breakdown voltage, and then dividing the dielectric breakdown voltage by the sheet thickness.
  • the relative dielectric constant and dielectric loss tangent of the resin sheet at a frequency of 1 GHz and a temperature of 23°C were measured by the cavity resonator perturbation method with reference to ASTM D2520.
  • a PNA-L network analyzer N5230A [manufactured by Agilent Technologie: product name] was used as a network analyzer, and a cavity resonator for 1 GHz; CP431 [manufactured by Kanto Electronics Application Development Co., Ltd.] was used as a cavity resonator.
  • the measurement of the relative permittivity and the dielectric loss tangent was performed in an environment of a temperature of 23° C. ⁇ 1° C. and a humidity of 50% RH ⁇ 5% RH.
  • the relative permittivity and the dielectric loss tangent were measured twice, and the average value was used as the relative permittivity and the dielectric loss tangent.
  • ⁇ Long-term heat resistance of resin sheet The long-term heat resistance of the resin sheet is determined by placing the resin sheet in a hot air oven at a temperature of 200° C. and leaving it to stand for 1000 hours. It was judged.
  • Mechanical properties were evaluated by tensile maximum strength, tensile elongation at break, and tensile elastic modulus. The mechanical properties were measured in the extrusion direction and the width direction (direction perpendicular to the extrusion direction). The measurement was based on JISK 7127, and was performed under the conditions of a tensile speed of 50 mm/min, a temperature of 23° C. ⁇ 2° C., and a relative humidity of 50% RH ⁇ 5% RH. The maximum tensile strength, the elongation at break, and the tensile elastic modulus were measured 5 times, and the average values were taken as the maximum tensile strength, the elongation at break, and the tensile elastic modulus.
  • an electrode shape is an upper electrode ⁇ 25 mm, a column shape with a height of 25 mm, and a lower electrode serving as a pedestal. It was measured in a cylindrical shape having a diameter of 25 mm and a height of 25 mm.
  • the breakdown voltage was measured 5 times, and the average value was taken as the breakdown voltage.
  • the pressurizing rate is shown in Table 2.
  • the dielectric breakdown strength is the value obtained by measuring the sheet thickness at the location where the dielectric breakdown voltage is measured in advance before measuring the dielectric breakdown voltage, measuring the dielectric breakdown voltage, and then dividing the dielectric breakdown voltage by the sheet thickness. did.
  • Dielectric breakdown strength and rate of change of dielectric breakdown strength
  • a PNA-L network analyzer N5230A [manufactured by Agilent Technologie: product name] was used as a network analyzer, and a cavity resonator for 1 GHz; CP431 [manufactured by Kanto Electronics Application Development Co., Ltd.] was used as a cavity resonator.
  • the measurement of the relative permittivity and the dielectric loss tangent was performed in an environment of temperature: 23°C ⁇ 1°C and humidity of 50%RH ⁇ 5%RH.
  • the relative permittivity and the dielectric loss tangent were measured 5 times, and the average value was used as the relative permittivity and the dielectric loss tangent.
  • Example 2 In order to manufacture an insulating material for a motor, a commercially available polyether ether ketone resin used in Example 1 was prepared as a polyarylene ether ketone resin, and a polyether ether ketone resin made of polyether ether ketone resin was prepared in the same manner as in Example 1. The resin sheet was formed into a strip shape. After the resin sheet was formed into a strip shape, the sheet thickness, water absorption rate, relative crystallinity, mechanical characteristics, and electrical characteristics of the resin sheet were measured, and the measurement results are shown in Table 1. Regarding the temperature of the melted polyether ether ketone resin, the resin temperature at the inlet of the T die was measured, and it was 397° C. when measured. The surface temperature of the pressure-bonding roll was measured by a non-contact type thermometer and found to be 213°C.
  • Example 3 As the polyarylene ether ketone resin, the commercially available polyether ether ketone resin used in Example 1 was prepared, and a resin sheet made of the polyether ether ketone resin was formed into a strip shape by the same method as in Example 1. After the resin sheet was formed into a strip shape, the sheet thickness, water absorption rate, relative crystallinity, mechanical characteristics, and electrical characteristics of the extruded resin sheet were measured, and the measurement results are shown in Table 1.
  • the resin temperature at the inlet of the T-die was measured, and it was 398° C. when measured.
  • the cooling roll was changed to 230°C.
  • the temperature of the pressure bonding roll was measured with a non-contact type thermometer, it was 235°C.
  • a wholly aromatic polyaramid fiber sheet for motor insulation As a wholly aromatic polyaramid fiber sheet for motor insulation, a commercially available wholly aromatic polyaramid fiber sheet [Dupont Teijin Advanced Paper Co. product name: Nomex paper type 410 nominal thickness: 013 mm] is prepared. The sheet thickness, water absorption rate, mechanical properties, electrical insulation, and long-term heat resistance of the polyaramid fiber sheet were measured by the same method as in Example 1, and the measurement results are shown in Table 3. In the wholly aromatic polyaramid fiber sheet, the longitudinal direction was the extrusion direction and the short direction was the width direction (the direction perpendicular to the extrusion direction).
  • the wholly aromatic polyamide resin sheet was measured with a differential scanning calorimeter at a temperature rising rate of 10°C/min and a measurement temperature range of 20°C to 380°C. I didn't ask for a degree.
  • a wholly aromatic polyaramid fiber sheet for insulating material As a wholly aromatic polyaramid fiber sheet for insulating material, a wholly aromatic polyaramid fiber sheet commercially available [Product name: Nomex paper type 410 nominal thickness: 025 mm manufactured by DuPont Teijin Advanced Paper Co., Ltd.] is prepared. The sheet thickness, water absorption rate, mechanical properties, electrical insulation properties, and long-term heat resistance were measured in the same manner as in Example 1, and the measurement results are shown in Table 3. In the wholly aromatic polyaramid fiber sheet, the longitudinal direction was the extrusion direction and the short direction was the width direction (the direction perpendicular to the extrusion direction).
  • the wholly aromatic polyamide resin sheet was measured with a differential scanning calorimeter at a temperature rising rate of 10°C/min and a measurement temperature range of 20°C to 380°C. I didn't ask for a degree.
  • the mechanical properties of the resin sheet which is the insulating material of each example, have a high tensile modulus of elasticity of 3500 N/mm 2 or more, so the resin sheet is processed into a wall member, a partitioning member, and a covering member, and the inside of the slot of the core of the stator is processed. If you insert it in, you can expect to prevent buckling. Further, the resin sheets of the respective examples have extremely high toughness with a maximum tensile strength of 100 N/mm 2 or more and an elongation at break of 200% or more, and thus are processed into wall members, partitioning members, and covering members. Then, when it is inserted into the slot of the core of the stator, troubles such as breakage, cracking, and tearing can be prevented in advance.
  • the water absorption of the resin sheet which is the insulating material in each example, was 1.0% or less at a temperature of 23° C., specifically 0.7% or less. Therefore, even if the motor is used in a high temperature and humidity environment, electrical characteristics such as dielectric breakdown strength, dielectric breakdown strength, relative permittivity, and dielectric loss tangent can be maintained.
  • the electrical insulation properties of the resin sheets of each example in silicone oil at 23° C. and 200° C. are 9 kV or more for the breakdown voltage and 50 kV/mm or more for the breakdown strength which is the breakdown voltage per unit thickness.
  • the relative dielectric constant at 23° C. is 3.0 or less, it is presumed that the dielectric breakdown resistance due to surge voltage is excellent.
  • the dielectric loss tangent is 0.003 or less, it can be expected to eliminate melting and thermal decomposition due to self-heating.
  • the rate of change in mechanical properties was 20% or less and the rate of change in electrical insulation was 10% or less before and after standing in a hot air oven at 200°C. Therefore, if the resin sheet of the embodiment is used for the motor, excellent long-term heat resistance can be expected.
  • the elongation at tensile breaking is less than 80% and the toughness is problematic, and the tensile elastic modulus in the width direction is less than 3500 N/mm 2 Was insufficient. Therefore, when the wholly aromatic polyaramid fiber sheet is processed into the wall member, the partition member, and the covering member and inserted into the slot of the core of the stator, it is presumed that there is a considerable risk of buckling. Further, since the water absorption rate of the wholly aromatic polyaramid fiber sheet of each comparative example is as high as 10% or more, it is presumed that the electric insulation may be greatly affected by the use environment.
  • the electrical insulation of the wholly aromatic polyaramid fiber sheet of each comparative example is 40 kV/mm or less with respect to the dielectric breakdown strength which is the dielectric breakdown voltage per unit thickness, it is presumed that the problem of dielectric breakdown due to surge voltage occurs. To be done. Further, since the wholly aromatic polyaramid fiber sheet of each comparative example has a dielectric loss tangent of 0.019 or more, it is presumed that melting or thermal decomposition may occur due to self-heating.
  • the insulating material for a rotating electric machine and the rotating electric machine according to the present invention are used in the manufacturing fields of electric, electronic, automobile, railway vehicles and the like.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Organic Insulating Materials (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente invention concerne : un matériau isolant pour machines dynamo-électriques, qui permet d'augmenter l'occupation d'un fil d'enroulement conducteur, tout en pouvant obtenir d'excellentes propriétés d'isolation électrique, des propriétés diélectriques faibles, une rigidité élevée, une ténacité élevée, une faible absorption d'eau, une résistance à la chaleur élevée, une résistance chimique et similaires ; et une machine dynamo-électrique.　Un matériau isolant pour machines dynamo-électriques est composé d'une feuille de résine de polyarylène éther cétone (11) ; et la feuille de résine de polyarylène éther cétone (11) a des caractéristiques électriques telles qu'une résistance au claquage diélectrique par unité d'épaisseur dans une huile de silicone de 40 kV/mm ou plus, une constante diélectrique relative à la fréquence de 1 GHz de 3,1 ou moins, et une tangente de perte diélectrique de 0,01 ou moins. L'amincissement et l'augmentation de l'occupation d'un fil d'enroulement conducteur (7) dans une machine dynamo-électrique (1) peuvent être prévus par sélection de la feuille de résine de polyarylène éther cétone (11) qui a d'excellentes caractéristiques électriques et similaires et par définition de l'épaisseur de la feuille de résine de polyarylène éther cétone (11) à une valeur comprise entre 50 µm et 1 000 µm.
PCT/JP2020/002325 2019-01-24 2020-01-23 Matériau isolant pour machines dynamo-électriques, et machine dynamo-électrique WO2020153426A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013508491A (ja) * 2009-10-21 2013-03-07 エボニック デグサ ゲーエムベーハー ポリアリーレンエーテルケトンより成るフィルム
JP2017050964A (ja) * 2015-09-01 2017-03-09 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 電動機の固定子、電動機および空調機器
JP2018068104A (ja) * 2017-11-02 2018-04-26 デュポン帝人アドバンスドペーパー株式会社 モータ用ボビン及びその製造方法
JP2018203979A (ja) * 2017-01-30 2018-12-27 Ａｇｃ株式会社 組成物から作られる物品

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005151684A (ja) 2003-11-14 2005-06-09 Matsushita Electric Ind Co Ltd 回転電機固定子、及びそれを用いた密閉型圧縮機
JPWO2015105095A1 (ja) 2014-01-10 2017-03-23 古河電気工業株式会社 絶縁電線、コイルおよび電気・電子機器ならびに絶縁電線の割れ防止方法
JP6135541B2 (ja) 2014-02-17 2017-05-31 旭硝子株式会社 フッ素樹脂組成物の製造方法、成形品の製造方法及び電線の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013508491A (ja) * 2009-10-21 2013-03-07 エボニック デグサ ゲーエムベーハー ポリアリーレンエーテルケトンより成るフィルム
JP2017050964A (ja) * 2015-09-01 2017-03-09 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 電動機の固定子、電動機および空調機器
JP2018203979A (ja) * 2017-01-30 2018-12-27 Ａｇｃ株式会社 組成物から作られる物品
JP2018068104A (ja) * 2017-11-02 2018-04-26 デュポン帝人アドバンスドペーパー株式会社 モータ用ボビン及びその製造方法

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