WO2011092928A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

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Publication number
WO2011092928A1
WO2011092928A1 PCT/JP2010/070852 JP2010070852W WO2011092928A1 WO 2011092928 A1 WO2011092928 A1 WO 2011092928A1 JP 2010070852 W JP2010070852 W JP 2010070852W WO 2011092928 A1 WO2011092928 A1 WO 2011092928A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
stator coil
coil
bracket
rotating electrical
Prior art date
Application number
PCT/JP2010/070852
Other languages
English (en)
Japanese (ja)
Inventor
剛 野中
Original Assignee
株式会社安川電機
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 株式会社安川電機 filed Critical 株式会社安川電機
Priority to CN2010800571756A priority Critical patent/CN102668338A/zh
Priority to JP2011551687A priority patent/JPWO2011092928A1/ja
Publication of WO2011092928A1 publication Critical patent/WO2011092928A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/227—Heat sinks

Definitions

  • the present invention relates to a rotating electrical machine such as an EV motor, and more particularly to cooling of a stator coil.
  • a conventional rotary electric machine having a substantially cylindrical rotor rotatably supported, a stator, a bracket for supporting the components, and a water cooling structure has an example in which a cooling water channel is provided in a frame ( For example, see Patent Document 1).
  • FIG. 1 A conventional rotary electric machine having a substantially cylindrical rotor rotatably supported, a stator, a bracket for supporting the components, and a water cooling structure has an example in which a cooling water channel is provided in a frame ( For example, see Patent Document 1).
  • the rotating electrical machine includes a substantially cylindrical rotor 7 that is rotatably supported, a stator core 2, a stator coil 3 mounted on the stator core, and a load side bracket that supports the components. 4a, an anti-load side bracket 4b, and a frame 1.
  • a cooling water channel 12 is provided in the frame. The heat generated by the loss generated in the stator coil is radiated to the outside by the cooling water through the insulator, the stator core, and the frame.
  • high thermal conductivity insulators 10a and 10b are filled between the load side coil end 3a and the anti-load side coil end 3b of the stator coil and the frame. With the high thermal conductive insulator, the amount of heat generated in the stator coil can be radiated more directly to the frame, and the rated output of the rotating electrical machine can be increased.
  • FIG. 15 is an axial sectional view of another conventional rotating electrical machine.
  • a load side coil end 21e of a stator coil 21 made of a plate-shaped conductor mounted on a stator core 22 is formed with an inner peripheral surface and an outer peripheral surface on one cylindrical surface, and an end surface on a single plane. And is in close contact with the groove 25e of the load side bracket 25 via an insulator 24.
  • the heat generated in the stator coil is directly radiated to the load side bracket and radiated from the load side bracket to the external device.
  • the coil end of the stator coil is more likely to be in close contact with the load side bracket than the frame, and the heat dissipation effect is greater than with a high thermal conductive insulator as shown in FIG.
  • the amount of heat reaching the load side bracket is dissipated to the external device to which the load side bracket is attached.
  • the conventional rotating electrical machine has been devised to dissipate the heat loss generated by the stator coil mounted on the stator core more effectively to the outside.
  • JP 2002-191149 A page 6, FIG. 1
  • JP 2006-050853 A page 7, FIG. 2
  • the amount of heat generated in the stator coil is improved by the heat dissipation because the amount of heat generated in the stator coil is dissipated to the outside by cooling water through the insulator, the stator core, and the frame.
  • the conductive insulator is used together with the effect of directly radiating the heat generated in the stator coil to the frame.
  • a high thermal conductivity insulator is generally superior in thermal conductivity as compared to an insulator, it is significantly inferior in thermal conductivity and has little improvement in heat dissipation effect compared to a metal such as a bracket.
  • Patent Document 2 Another conventional rotating electric machine shown in Patent Document 2 has a heat-dissipating effect up to the load-side bracket because the coil end of the stator coil is brought into close contact with the load-side bracket, but does not have a water cooling structure.
  • the heat dissipation from the load side bracket to the outside of the rotating electrical machine has a low limit.
  • An object of the present invention is to provide a rotating electrical machine having a compact water-cooling structure that enables larger energization and improves rated output.
  • the present invention is configured as follows.
  • the invention described in claim 1 In a rotating electrical machine having a substantially cylindrical rotor that is rotatably supported, a stator, a bracket that supports the stator, and a water cooling structure,
  • the bracket is a rotating electrical machine characterized by having a cooling water passage and a portion that is in close contact with the stator coil via an insulator.
  • the invention according to claim 2 2.
  • the rotating electrical machine according to claim 1, wherein the cooling water passage of the bracket has an opening portion on the motor outer side and does not have an opening portion on the motor inner side.
  • the invention according to claim 3 2.
  • the invention according to claim 4 2.
  • the invention according to claim 5 2.
  • the rotating electrical machine according to claim 1, wherein the insulator through the stator coil and the bracket is a ring-shaped molded product and is mounted between the coil end portion of the stator coil and the bracket. .
  • the invention according to claim 6 2.
  • the bracket Since the bracket has a cooling water channel and a part that is in close contact with the stator coil via an insulator, the heat loss generated in the stator coil is effectively radiated to the cooling water channel, and the temperature of the stator coil increases. It is possible to provide a rotating electrical machine having a compact water-cooling structure that can suppress energies, enable larger energization with respect to the allowable temperature, and improve the rated output.
  • the cooling water passage of the bracket does not have an opening portion on the inner side of the motor, the cooling water is not immersed on the inner side of the rotating electric machine of the bracket, and the insulation around the stator coil is not lowered.
  • stator coil Since the stator coil is fitted with an air-core coil whose outer shape is press-molded in the slot of the stator core, the coil end of the stator coil can be easily brought into close contact with the bracket, and the amount of heat generated by the stator coil It is easy to radiate heat to the bracket.
  • the stator coil is installed in a distributed winding in the slot portion of the stator core, and has a coil end portion whose outer shape is press-molded, so that the coil end portion of the stator coil can be easily adhered to the bracket, and the stator coil It is easy to dissipate the amount of heat generated in the bracket.
  • the insulator through the stator coil and the bracket is a ring-shaped product, it can be manufactured at low cost.
  • the insulator through the stator coil and bracket is a ceramic film treated on the surface of the bracket, it is a material that combines high insulation resistance and high thermal conductivity, and is generated in the stator coil while ensuring insulation. It is easy to dissipate heat to the bracket.
  • FIG. 1 is an axial sectional view of a rotating electrical machine showing a first embodiment of the present invention.
  • Radial sectional view of the rotating electrical machine Explanatory drawing which shows the pressure molding method of the load side coil end part Structure example of a rotating electrical machine with a conventional water cooling structure
  • FIG. 1 is an axial sectional view of a rotating electrical machine showing a first embodiment of the present invention for use in an EV motor.
  • a rotor core 33 of a rotor 31 of the motor is fixed to a shaft 34 by a load side plate 35 and an anti-load side plate 36, and is connected to a load side via a load-side bearing 37 and an anti-load side bearing 38.
  • the bracket 43 and the anti-load side bracket 44 are rotatably supported.
  • An encoder portion 41 for detecting the rotational position of the rotor is installed at the end on the side opposite to the load of the shaft.
  • the stator coil 46 is mounted so as to be in close contact with the load side bracket via the insulator 47.
  • the load-side bracket has a portion that is in close contact with the stator coil via an insulator, and has a cooling water channel 43c, so the amount of heat due to lost heat generated in the stator coil is Effectively dissipates heat to the cooling water channel, suppresses the temperature rise of the stator coil, enables larger energization with respect to the allowable temperature, and improves the rated output.
  • the cooling water channel is sealed by a cover 50 fastened to the load side bracket by a bolt 55, and the outer O-ring 53 and the inner O-ring 54 are sealed. Prevents the leakage of cooling water. The amount of heat is radiated to the outside through the outlet pipe 43b together with the cooling water.
  • the stator coil has an insulator 48 and is insulated from the stator core. Energization to the stator coil is supplied from the outside through a lead wire (not shown) from the connection portion 42 of the stator coil.
  • the anti-load side bracket is fastened to the load side bracket by a bolt (not shown) together with the frame 51.
  • FIG. 2 is a radial sectional view of the motor.
  • the rotor 31 of the motor has an embedded magnet type structure in which a permanent magnet 32 is installed in a rotor core 33 in a V-shape for each pole and constitutes a 10-pole magnetic pole.
  • the stator has a stator core 45 divided for each tooth and a stator coil 46 wound around concentrated winding and press-molded on the outer shape.
  • FIG. 3 is an explanatory view of the shape of the load side bracket.
  • the load-side bracket 43 has a portion that is in close contact with the stator coil via an insulator, and has a cooling water channel 43c.
  • the cooling water is introduced from the introduction pipe 43a, receives the heat amount of the load side bracket while passing through the cooling water passage 43c, and is led out from the lead-out pipe 43b.
  • the motor of this embodiment is cooled while repeating the circulation introduced into the load side bracket again.
  • the cooling fins 43d constitute a cooling water channel and are provided to promote heat exchange from the load side bracket to the cooling water.
  • the load-side bracket is provided with a bolt hole 43e for attachment to an external device, a fastening bolt hole 43f with a frame, and a screw hole 43g for cover attachment.
  • FIG. 4 is an explanatory diagram before mounting the stator coil.
  • a stator coil 46 is mounted so that 12 air-core coils whose outer shapes are pressure-molded are in close contact with the load-side bracket 43 via an insulator 47.
  • the insulator through the stator coil and the load-side bracket is a ceramic film treated on the surface of the load-side bracket, so it is a material that combines high insulation resistance and high thermal conductivity. It is easy to dissipate the heat generated in the coil to the bracket.
  • the ceramic coating is sealed to ensure insulation.
  • the stator coil 46 has an outer insulator 48a and an inner insulator 48b, and is insulated from the stator core by an insulating tape 48c attached in the circumferential direction. Insulated from adjacent stator coils.
  • the insulator is an injection-molded part made of a resin material having good fluidity that can be thinly molded, or a sheet processed part that is obtained by heating and pressure-molding a sheet-like resin.
  • the stator coil is formed by winding a round copper wire having an insulating film, and the slot portion of the stator core and the load side coil end portion 46c attached to the load side bracket are wound in completely aligned winding, All intersections of the round copper wires are performed at the anti-load side coil end portion 46d, and the winding start coil end 46a and the winding end coil end 46b of the stator coil are provided at the anti-load side coil end portion 46d.
  • the load side coil end portion 46c of the stator coil 46 has an inner peripheral surface and an outer peripheral surface formed on one cylindrical surface, and an end surface thereof. Since the air-core coil is pressure-molded on one conical surface, it is attached in close contact with the load-side bracket via the insulator 47 in a ring shape.
  • the insulator is a ceramic film processed on the surface of the load side bracket 43, and the load is reduced from the stator coil by setting the minimum thickness to ensure the necessary insulation resistance and withstand voltage between the stator coil and the load side bracket. The heat dissipation to the side bracket is improved.
  • the stator coil has a gap 46d inside the stator coil where the teeth 45a of the stator core are mounted, and the stator core 45 divided for each tooth is mounted in contact with the insulator 47 from the outside. .
  • the connection board 52 is connected and attached to the winding start coil end and winding end coil end of the anti-load side coil end of the stator coil shown in FIG.
  • FIG. 7 is an explanatory diagram of the mounting state of the frame.
  • the heated frame 51 is shrink-fitted and mounted on the stator core.
  • FIG. 8 is an operation explanatory view for press-molding the outer shape of the stator coil.
  • the press jig for press-molding the outer shape of the stator coil includes an upper punch 61, a lower punch 62, a die 63 and a core pin 64, and a copper wire is wound around the coil mounting space 63a.
  • the upper punch is pressed downward to press-mold the outer shape of the stator coil 46.
  • FIG. 9 is an explanatory view of the pressure molding of the outer shape of the stator coil as viewed from the circumferential direction.
  • the outer shape of the stator coil 46 is pressure-molded except for the end face of the coil end portion on the non-load side. Then, the insulation film is fused by heating to complete the air-core coil.
  • FIG. 10 is a comparative diagram showing the effect of the present embodiment.
  • the average temperature of the stator coil is 130 ° C. when the cooling water temperature of the frame is maintained at 60 ° C. in the rated output state.
  • the stator coil and the insulator are in contact at about 129 ° C.
  • the insulator and the stator core are in contact at about 102 ° C.
  • the stator core and the frame are in contact at about 72 ° C. Since the heat radiation path of heat is complicated, the average temperature of the stator coil is increased by 70 ° C. with respect to the cooling water temperature of 60 ° C.
  • stator coil temperature is reduced to 73 ° C., and the stator coil average temperature is 60 ° C. cooling water temperature. Decreases to 13 ° C rise. This is because the amount of heat moves more directly from the stator coil to the cooling water of the load side bracket. Also, as shown in (c), when the amount of heat at 130 ° C., which is the same as that of the stator coil of the conventional structure, is obtained, the generation of heat of 567% can be allowed for (a), and the output is about 2.4 times Can be increased.
  • the heat loss generated in the stator coil is effectively radiated to the cooling water channel, the temperature increase of the stator coil is suppressed, and the allowable temperature is larger. It is possible to provide a rotating electrical machine having a compact water-cooling structure that enables energization and improves the rated output.
  • the part in which the present invention is different from Patent Documents 1 and 2 is a part in which the bracket has a cooling water channel and a part in close contact with the stator coil via an insulator.
  • FIG. 11 is an axial cross-sectional view of a rotating electrical machine showing a second embodiment of the present invention.
  • the rotating electrical machine includes a frame 91, a counter load side bracket 84, a stator having a stator coil 86, and a load side bracket 83, and is rotatably supported by the load side bracket and the anti load side bracket.
  • the rotor is not shown.
  • the load-side coil end portion 86a of the stator coil has an inner peripheral surface 86aa and an outer peripheral surface 86ab formed on one cylindrical surface, and an end surface 86ac is pressure-formed on one flat surface.
  • the load-side bracket has a load-side coil end portion and a groove portion 83a of a recess that is in close contact with the inner peripheral surface, outer peripheral surface, and end surface of the load-side coil end portion, and the groove portion has a high heat conductive resin that is an insulator.
  • the load-side coil end part is fixed with a molding resin through the injection molded part. Having a cooling water channel outside the load side bracket is the same as in the first embodiment.
  • the load-side bracket has a portion that is in close contact with the stator coil via an insulator and has a cooling water channel, the heat amount due to heat loss generated in the stator coil is effectively dissipated to the cooling water channel, and the stator The rated output is improved by suppressing the temperature rise of the coil and enabling larger energization with respect to the allowable temperature.
  • Other structures are the same as in the first embodiment, such that the stator coil is energized from the outside to the stator coil via a lead wire (not shown).
  • FIG. 12 is a radial cross-sectional view of the rotating electrical machine.
  • a rotor 71 of a rotating electric machine has an embedded magnet type structure in which a permanent magnet 75 is installed in a rotor core 73 in a V shape for each pole and constitutes a magnetic pole of 10 poles.
  • the stator is insulated by attaching insulating paper to the teeth 85a of the stator core 85, winding a winding having an insulating coating with distributed winding, and then attaching to the teeth to form a stator coil 86.
  • the inner periphery of the frame 91 is held.
  • FIG. 13 is an explanatory view showing a pressure forming method of the load side coil end portion.
  • the stator 4 is formed by winding a winding having an insulating coating on the teeth portion of the stator core 84 in a distributed manner, and then mounting the teeth on the teeth portion to form a stator coil 86.
  • the load side coil end portion 86a is With the inner peripheral surface forming jig 92, the outer peripheral surface forming jig 93, and the end surface forming jig 94, the inner peripheral surface 86aa and the outer peripheral surface 86ab are each formed on one cylindrical surface, and the end surface 86ac is formed on one flat surface.
  • the rotating electrical machine of the present embodiment the heat loss generated in the stator coil is effectively radiated to the cooling water channel, the temperature increase of the stator coil is suppressed, and the allowable temperature is larger. It is the same as the rotating electrical machine of the first embodiment of the present invention that it is possible to provide a rotating electrical machine having a compact water-cooling structure that enables energization and improves the rated output.
  • the part in which the present invention is different from Patent Documents 1 and 2 is a part in which the bracket has a cooling water channel and a part in close contact with the stator coil via an insulator.
  • This embodiment is different from the first embodiment of the present invention in that the air core coil is not mounted, but the winding is mounted on the distributed winding in the slot portion of the stator core.
  • the rotating electrical machine of the present invention can be applied to a wide variety of industrial rotating electrical machines as well as EV motors because it can provide a rotating electrical machine that suppresses temperature rise and improves the rated output as compared to the conventional one.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Windings For Motors And Generators (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne une machine électrique tournante pourvue d'une structure de refroidissement par eau compacte dans laquelle la chaleur perdue générée dans une bobine de stator est libérée de manière efficace vers un canal d'eau de refroidissement pour, de ce fait, supprimer l'augmentation de température de la bobine de stator et permettre le passage d'un courant électrique plus grand à une température admissible, améliorant de ce fait la sortie assignée. L'invention concerne spécifiquement une machine électrique tournante pourvue d'un rotor à peu près cylindrique qui est supporté de manière à pouvoir tourner, d'un stator, d'un support qui supporte le stator, et d'une structure de refroidissement par eau, ladite machine électrique tournante étant caractérisée en ce que le support comprend un canal d'eau de refroidissement et comprend une partie qui est placée à proximité étroite d'une bobine de stator avec un isolant entre elles.
PCT/JP2010/070852 2010-01-28 2010-11-24 Machine électrique tournante WO2011092928A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010800571756A CN102668338A (zh) 2010-01-28 2010-11-24 旋转电机
JP2011551687A JPWO2011092928A1 (ja) 2010-01-28 2010-11-24 回転電機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-016484 2010-01-28
JP2010016484 2010-01-28

Publications (1)

Publication Number Publication Date
WO2011092928A1 true WO2011092928A1 (fr) 2011-08-04

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PCT/JP2010/070852 WO2011092928A1 (fr) 2010-01-28 2010-11-24 Machine électrique tournante

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JP (1) JPWO2011092928A1 (fr)
CN (1) CN102668338A (fr)
WO (1) WO2011092928A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2587641A3 (fr) * 2011-10-27 2016-08-24 Kobelco Construction Machinery Co., Ltd. Moteur ayant feuille de transfert thermique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116526722B (zh) * 2023-03-10 2023-12-19 广东白云学院 一种陶瓷风冷结构的轴向磁通无磁轭轮毂电机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006158200A (ja) * 2006-03-20 2006-06-15 Hitachi Ltd 車両用交流発電機
JP2007165140A (ja) * 2005-12-14 2007-06-28 Nec Tokin Corp 電磁リレー
WO2008149649A1 (fr) * 2007-06-06 2008-12-11 Kabushiki Kaisha Yaskawa Denki Dispositif électrique tournant, et son procédé de fabrication
JP2009545861A (ja) * 2006-04-04 2009-12-24 カオ グループ、インク． 物理的空間を照らすための、３次元リードフレームを具備した半導体光源

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JP2000197311A (ja) * 1998-12-25 2000-07-14 Toyota Motor Corp 回転電機のコイル冷却構造
JP3877894B2 (ja) * 1999-01-13 2007-02-07 三菱電機株式会社 車両用ブラシレス交流発電機
JP3877898B2 (ja) * 1999-02-23 2007-02-07 三菱電機株式会社 車両用交流発電機
US6633098B2 (en) * 2001-08-29 2003-10-14 Hitachi, Ltd. Alternator for use in a vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007165140A (ja) * 2005-12-14 2007-06-28 Nec Tokin Corp 電磁リレー
JP2006158200A (ja) * 2006-03-20 2006-06-15 Hitachi Ltd 車両用交流発電機
JP2009545861A (ja) * 2006-04-04 2009-12-24 カオ グループ、インク． 物理的空間を照らすための、３次元リードフレームを具備した半導体光源
WO2008149649A1 (fr) * 2007-06-06 2008-12-11 Kabushiki Kaisha Yaskawa Denki Dispositif électrique tournant, et son procédé de fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2587641A3 (fr) * 2011-10-27 2016-08-24 Kobelco Construction Machinery Co., Ltd. Moteur ayant feuille de transfert thermique

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Publication number Publication date
CN102668338A (zh) 2012-09-12
JPWO2011092928A1 (ja) 2013-05-30

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