WO2010131319A1 - Procédé de fabrication de stator et stator - Google Patents

Procédé de fabrication de stator et stator Download PDF

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Publication number
WO2010131319A1
WO2010131319A1 PCT/JP2009/058751 JP2009058751W WO2010131319A1 WO 2010131319 A1 WO2010131319 A1 WO 2010131319A1 JP 2009058751 W JP2009058751 W JP 2009058751W WO 2010131319 A1 WO2010131319 A1 WO 2010131319A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulator
coil
stator
edgewise coil
manufacturing
Prior art date
Application number
PCT/JP2009/058751
Other languages
English (en)
Japanese (ja)
Inventor
三元 井ノ口
Original Assignee
トヨタ自動車株式会社
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 トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to JP2010540979A priority Critical patent/JP5093362B2/ja
Priority to PCT/JP2009/058751 priority patent/WO2010131319A1/fr
Publication of WO2010131319A1 publication Critical patent/WO2010131319A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12—Machines characterised by the bobbins for supporting the windings

Definitions

  • the present invention relates to a stator manufacturing method for manufacturing a stator having a split stator including a split core, an insulator, and a concentrated winding coil.
  • the present applicants have proposed a method of manufacturing a split stator in Patent Documents 1 and 2. That is, an insulator having a thickness of 0.2 to 0.3 mm is formed on the tooth portion of the split core. Next, an edgewise coil is mounted on the insulator. Resin molding is performed by inserting the split core on which the edgewise coil is mounted via the insulator. Thereby, a split stator can be manufactured. According to this manufacturing method, since the resin mold enters the gap between the edgewise coils, a stator excellent in heat dissipation can be manufactured.
  • Patent Documents 1 and 2 have the following problems. (1) When an edgewise coil is mounted on an insulator, a gap is formed between the insulator and the edgewise coil. Since this gap is small, when resin molding is performed, the resin cannot enter and an air layer is formed. When used as a stator, heat is generated in the edgewise coil. The generated heat is released to the core through the insulator. However, if an air layer exists between the insulator and the edgewise coil, there is a problem that the efficiency of heat transfer is significantly deteriorated. (2) Further, since the resin is heated and cooled to mold the insulator, the heated energy is discarded as it is, and there is a problem that it cannot contribute to energy saving and carbon dioxide reduction.
  • the present invention is for solving the above-described problems, and can efficiently dissipate heat generated in the coil to the stator core, and can effectively use the heat energy necessary to mold the insulator.
  • An object of the present invention is to provide a stator manufacturing method that can be used.
  • a stator manufacturing method has the following configuration.
  • (1) In a stator manufacturing method for manufacturing a stator having a split stator including a split core, an insulator, and a concentrated winding coil, a molding step for forming the insulator by inserting the concentrated winding coil, and the insulator While the formed concentrated winding coil is kept at a predetermined temperature or more, it is attached to the teeth portion of the split core and cooled, whereby a shrink fitting process for shrink fitting the concentrated winding coil formed with the insulator into the teeth portion, Have.
  • the insulator is formed only at a location where the coil faces the split core.
  • the insulator is formed to cover the entire circumference of the coil.
  • a gap is formed between the outer peripheral surface of the insulator and the insulator outer peripheral surface of the split core adjacent to the split core.
  • the concentrated winding coil is an edgewise coil, and a positioning mechanism that positions the edgewise coil in a molding die It is preferable to have.
  • the positioning mechanism is a convex portion formed by inserting an edgewise coil in advance.
  • the stator is manufactured by any one of the stator manufacturing methods described in (1) to (6).
  • stator manufacturing method for manufacturing a stator having a split stator including a split core, an insulator, and a concentrated winding coil
  • the insulator is molded by inserting the coil into the cavity, the insulator and the coil are heated to a temperature of 150 ° C. or higher.
  • the coil with the insulator formed on the inner peripheral surface or the like is still at a predetermined temperature (for example, 150 ° C.) or more, that is, immediately after the insulator is formed, it is attached to the tooth portion of the split core, and the split core is used as cold metal. Since the insulator and the coil are cooled, the insulator and the coil are cooled and contracted, so that the insulator and the coil are shrink-fitted to the teeth portion of the split core. Thereby, the clearance gap (existence of an air layer) between an insulator and a teeth part can be almost eliminated. In addition, since the heat energy used to form the insulator can be used as it is in the shrink-fitting process of the insulator and the coil, it can contribute to energy saving and carbon dioxide reduction.
  • a predetermined temperature for example, 150 ° C.
  • the insulator is formed only at a location where the coil faces the split core, the insulator is formed into a coil, and the remaining heat immediately after the molding Thus, the coil can be shrink-fitted into the split core.
  • the insulator is formed so as to cover the entire circumference of the coil. Therefore, the insulator includes an insulator and a resin mold of Patent Document 1. Therefore, the resin molding step can be omitted and the production efficiency can be improved.
  • a gap is formed between the outer peripheral surface of the insulator and the outer peripheral surface of the insulator of the split core adjacent to the split core.
  • the concentrated winding coil is an edgewise coil, and has a positioning mechanism for positioning the edgewise coil in a molding die.
  • the insulator can be formed with a predetermined thickness on the inner peripheral surface of the edgewise coil.
  • the insulator formed on the inner peripheral surface of the edgewise coil has a thickness of about 0.2 to 0.3 mm. This is because sufficient insulation can be secured with such a thickness, and by reducing the thickness, the efficiency of heat transfer from the coil to the core is increased. However, the thickness of the insulator needs to be surely ensured to be 0.2 mm, and therefore a positioning mechanism is required.
  • the positioning mechanism is a convex portion formed by inserting an edgewise coil in advance, the edgewise coil is inserted.
  • a convex portion can be formed at a necessary portion of the edgewise coil.
  • the edgewise coil in which the convex portion is formed is inserted into the insulator molding die, the convex portion comes into contact with the inner surface of the die and is positioned.
  • the thickness of the insulator formed on the inner peripheral surface of the edgewise coil can be made constant.
  • the convex portion is formed of the same material as the insulator, the convex portion also constitutes a part of the insulator.
  • FIG. 1 it is a figure which shows the state which inserted the edgewise coil.
  • FIG. 2 it is a figure which shows the state which closed the upper mold
  • FIG. 3 it is a figure which shows the state which inject
  • FIG. 3 it is a figure which shows the relationship between the edgewise coil immediately after shape
  • FIG. 11 It is a perspective view of a stator assembly. It is a figure which shows the edgewise coil in which the positioning convex part of 2nd Example was formed. It is sectional drawing explaining the method to shape
  • FIG. 7 is a perspective view of the edgewise coil 11.
  • the edgewise coil 11 has a rectangular cross section with a thickness of 1 to 2 mm and a width of 8 to 10 mm, and a conductive wire having an enamel layer formed on the outer periphery is wound into a rectangular shape, and the length of the short side of the rectangle is sequentially changed.
  • the entire cross section is formed into a trapezoidal shape. Terminal portions 11 a and 11 b protrude from the edgewise coil 11.
  • Terminal portions 11 a and 11 b protrude from the edgewise coil 11.
  • a cavity 14 is constituted by a lower mold 12 that is a fixed mold and an upper mold 13 that is a movable mold.
  • the edgewise coil 11 is inserted into the cavity 14.
  • the terminal portions 11 a and 11 b of the edgewise coil 11 shown in FIG. 7 are sandwiched by stepped portions formed on the upper and lower molds 12 and 13 and protrude out of the cavity 14. Yes.
  • the lower mold 12 is formed with an injection port 12 a for injecting the resin F.
  • FIG. 2 when the edgewise coil 11 is inserted into the lower mold 12, the inner surface 14 a of the cavity 14 comes into contact with the outer peripheral surface 11 c of the edgewise coil 11. Is positioned. In this state, the upper mold 13 is lowered to a position where it comes into contact with the lower mold 12. The state is shown in FIG. As shown in FIG. 3, a cavity space 14 b for forming the insulator 15 exists on the inner peripheral surface of the edgewise coil 11. Further, a cavity space 14 c exists on the upper end surface of the edgewise coil 11. A cavity space 14 d exists on the lower end face of the edgewise coil 11. A cavity 14 is configured by the cavity spaces 14b, 14c, and 14d. The injection port 12a communicates with the cavity space 14d through the distribution flow path 12b.
  • FIG. 4 shows a state in which the resin F for molding the insulator 15 is injected.
  • the resin is a thermoplastic resin and is heated to 150 ° C. or more and melted.
  • the insulator 15 includes a cylindrical portion 15a, a core side portion 15b formed at one end of the cylindrical portion 15a on the divided core main body side, and a teeth tip side portion 15c formed at the other end side of the cylindrical portion 15a.
  • the cylindrical portion 15 a is a portion that covers the cylindrical inner surface of the edgewise coil 11.
  • the core side part 15b is a part facing the core main body inner peripheral surface 16b which is an inner peripheral surface other than the teeth part 16a of the split core 16 shown in FIG.
  • the teeth tip side portion 15 c is for holding the edgewise coil 11.
  • FIG. 5 shows a coil assembly 17 in a state where the edgewise coil 11 is inserted and the insulator 15 is formed.
  • segmentation core 16 is comprised from the laminated steel plate, and is iron. The linear expansion coefficient of iron is 12 * 10 ⁇ 6 .
  • the edgewise coil 11 is made of copper, and the insulator is made of resin. The linear expansion coefficient of copper and insulator resin is 17 * 10 ⁇ 6 .
  • the coil assembly 17 is inserted to the base of the tooth portion 16a of the split core 16, that is, to the position where the outer surface of the core side portion 15b of the insulator 15 is in contact with the core body inner peripheral surface 16b of the split core 16.
  • shrink fitting with a tightening margin of 0.013 mm is performed.
  • the state at room temperature is shown in FIG.
  • the insulator 15 and the edgewise coil 11 are shrink-fitted into the tooth portion 16a, thereby eliminating an air layer existing between the inner peripheral surface of the cylindrical portion 15a of the insulator 15 and the outer peripheral surface of the tooth portion 16a.
  • the outer side of the edgewise coil 11 is resin-molded to complete the split stator, 18 split stators are arranged in an annular shape, and the shrink fit ring 19 is shrink fit.
  • the stator assembly 20 is completed.
  • a stator is completed by attaching a bus bar to the stator assembly 20 and wiring and connecting the terminals of the three phases.
  • a stator having a split stator including the split core 16, the insulator 15, and the edgewise coil 11 that is a concentrated winding coil In the stator manufacturing method to be manufactured, the edgewise coil 11 is inserted and the insulator 15 is molded, and the edgewise coil 11 on which the insulator 15 is molded has a predetermined temperature (150 ° C. in this embodiment) or higher.
  • the edgewise coil has a shrink fitting process in which the edgewise coil 11 in which the insulator 15 is molded is shrink-fitted into the teeth portion 16a by being mounted on the teeth portion 16a of the split core 16 and being cooled. 11 is inserted into the cavity 14 and the insulator 15 is molded.
  • Shureta 15 and the coil 11 are heated to a temperature of at least 0.99 ° C..
  • the edgewise coil 11 with the insulator 15 formed on the inner peripheral surface or the like is mounted on the tooth portion 16a of the split core 16 in a state where the temperature is still higher than a predetermined temperature (150 ° C. in this embodiment), that is, immediately after the insulator is formed. Then, the insulator 15 and the edgewise coil 11 are cooled by using the split core 16 as a cold gold. Therefore, since the insulator 15 and the edgewise coil 11 are cooled and contracted, the insulator 15 and the edgewise coil 11 are Then, it is shrink-fitted into the teeth portion 16a of the split core 16.
  • the clearance gap (presence of an air layer) between the insulator 15 and the teeth part 16a can be almost eliminated. And the thermal radiation characteristic of a stator can be improved. Further, since the heat energy used for forming the insulator 15 can be used as it is in the shrink-fitting process of the insulator 15 and the edgewise coil 11, it can contribute to energy saving and carbon dioxide reduction. Further, since the insulator 15 is formed only at a position where the edgewise coil 11 is opposed to the split core 16, the insulator 15 is formed into the edgewise coil 11, and the edgewise coil is formed by the residual heat immediately after the molding. 11 can be shrink-fitted to the split core 16.
  • FIG. 9 shows a state in which four positioning convex portions 21 are formed on the outer periphery of the edgewise coil 11 before the main forming.
  • FIG. 10 shows a method for forming the product in the state shown in FIG.
  • FIG. 10 shows a cross-sectional view of a lower mold 22 that is a fixed mold in which the edgewise coil 11 is inserted, and an upper mold 23 that is a movable mold.
  • the cross section shows a lower mold 22 and an upper mold 23 corresponding to the AA cross section in FIG.
  • a flow path 24 through which resin passes is formed in the lower mold 22.
  • the flow path 24 is connected to a nozzle 25 for supplying resin.
  • FIG. 9 shows a state where the resin is injected and the positioning convex portions 21 are formed at four locations. As a result, the one shown in FIG. 9 is obtained. This is a preliminary process before the main molding.
  • FIG. 11 shows a state in which the edgewise coil 11 formed with the positioning convex portion 21 shown in FIG. 9 is inserted into the cavity 28 of the lower mold 26 which is a fixed mold, and the upper mold 27 which is a movable mold is closed. Indicates. A resin flow path 33 is formed in the lower mold 26.
  • the edgewise coil 11 is positioned with four positioning convex portions 21 in contact with the inner peripheral surface of the cavity 28 of the lower mold 26.
  • the edgewise coil 11 is in contact with the lower die 26 and the upper die 27 only through the four positioning convex portions 21, and the other portions are in a state of floating in the cavity 28.
  • a cavity 28 a is formed on the upper surface side of the edgewise coil 11 in the drawing, a cavity 28 b is formed on the left side, a cavity 28 c is formed on the lower side, and a cavity is formed on the right side except for the positioning convex portion 21. 28d is formed.
  • FIG. 12 shows a state where the resin F is injected and the insulator 29 is molded.
  • the flow path 33 is connected to a nozzle 36 for injecting the resin F.
  • the edgewise coil 11 is covered with an insulator 29 around the entire circumference. Since the positioning convex portion 21 and the resin injected in FIG. 12 are the same resin, the positioning convex portion 21 also constitutes the insulator 29 together with the newly injected resin F.
  • the insulator 29 according to the present embodiment includes the insulator 15 according to the first embodiment and a resin mold.
  • the resin F is a thermoplastic resin and is heated to 150 ° C. or more and melted.
  • FIG. 13 shows a coil assembly 30 in a state where the edgewise coil 11 is inserted and the insulator 29 is formed.
  • segmentation core 16 is comprised from the laminated steel plate, and is iron. The linear expansion coefficient of iron is 12 * 10 ⁇ 6 .
  • the edgewise coil 11 is made of copper, and the insulator is made of resin. The linear expansion coefficient of copper and insulator resin is 17 * 10 ⁇ 6 .
  • the coil assembly 30 is inserted to the base of the tooth portion 16a of the split core 16, that is, to the position where the outer surface of the core side portion 29b of the insulator 29 is in contact with the core body inner peripheral surface 16b of the split core 16.
  • shrink fitting with a tightening margin of 0.013 mm is performed.
  • FIG. 14 shows the state at room temperature.
  • the insulator 29 and the edgewise coil 11 are shrink-fitted to the tooth portion 16a, thereby eliminating an air layer existing between the inner peripheral surface of the tubular portion 29a of the insulator 29 and the outer peripheral surface of the tooth portion 16a.
  • the stator assembly 20 is completed by arranging 18 split stators in the state of FIG. 14 in an annular shape and shrink-fitting the shrink-fitting ring 19.
  • a stator is completed by attaching a bus bar to the stator assembly 20 and wiring and connecting the terminals of the three phases.
  • the insulator 29 is formed so as to cover the entire circumference of the edgewise coil 11. Since the insulator and the resin mold of Document 1 are integrally formed, the resin molding step can be omitted and the production efficiency can be increased. Moreover, since it has the positioning mechanism which positions the edgewise coil 11 in a shaping die, the insulator 29 can be shape
  • the thickness of the insulator 29 needs to be surely ensured by 0.2 mm, and thus a positioning mechanism is required.
  • the positioning mechanism is the positioning convex portion 21 formed by inserting the edgewise coil 11 in advance
  • the edgewise coil can be obtained by inserting the edgewise coil 11 and performing preliminary molding.
  • the positioning convex part 21 can be formed in 11 necessary places.
  • the edgewise coil 11 on which the positioning convex portion 21 is formed is inserted into the lower mold 26 that is an insulator molding die
  • the positioning convex portion 21 comes into contact with the inner surface of the lower mold 26 and is positioned.
  • the thickness of the insulator 29 formed on the inner peripheral surface of the edgewise coil 11 can be made constant.
  • the positioning convex portion 21 is formed of the same material as the insulator 29, the positioning convex portion 21 also constitutes a part of the insulator 29.
  • FIG. 15 shows the shape of the insulator 34 of the third embodiment.
  • the edgewise coil 11 and the insulator 34 attached to the adjacent split core 16 are shown in cross section.
  • a gap S is formed between the outer surfaces of adjacent insulators 34.
  • 18 gaps S are formed between 18 divided stators.
  • cooling oil may be applied to the stator in order to cool the stator. In that case, since the clearance S exists, the cooling oil flows through the clearance S, and the edgewise coil 11 can be efficiently cooled.
  • the positioning mechanism of the edgewise coil 11 is performed by forming the positioning convex portion 21 by preforming.
  • the positioning mechanism is provided with a sliding member protruding into the cavity by the biasing means. You may go by providing.
  • the edgewise coil 11 is positioned in the cavity at the tip of the sliding member.
  • the thickness of the insulator 15 formed on the inner peripheral surface of the edgewise coil 11 can be made constant.
  • the sliding member is retracted into the mold to form an insulator having a predetermined thickness. it can.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente invention a trait à un procédé de fabrication d'un stator où la chaleur produite dans une bobine peut être rayonnée de façon efficace vers un noyau de stator, et l'énergie thermique requise pour mouler un isolant peut être utilisée efficacement. La présente invention a trait à un procédé de fabrication d'un stator doté d'un double stator équipé d'un double noyau (16), d'un isolant (15) et d'une bobine de chant (11) d'une bobine d'enroulement concentré qui comprend une étape de moulage consistant à mouler l'isolant (15) en insérant la bobine de chant (11) et une étape d'ajustage par contraction consistant à ajuster par contraction la bobine de chant (11), lequel isolant (15) est moulé sur une partie de dent (16a) du double noyau (16) en fixant la bobine de chant (11), lequel isolant (15) est moulé sur une partie de dent (16a) du double noyau (16), tout en maintenant la bobine de chant (11) à une température prédéterminée (à 150 °C selon le mode de réalisation) ou plus puis en refroidissant la bobine de chant (11).
PCT/JP2009/058751 2009-05-11 2009-05-11 Procédé de fabrication de stator et stator WO2010131319A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010540979A JP5093362B2 (ja) 2009-05-11 2009-05-11 固定子製造方法、及び固定子
PCT/JP2009/058751 WO2010131319A1 (fr) 2009-05-11 2009-05-11 Procédé de fabrication de stator et stator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/058751 WO2010131319A1 (fr) 2009-05-11 2009-05-11 Procédé de fabrication de stator et stator

Publications (1)

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WO2010131319A1 true WO2010131319A1 (fr) 2010-11-18

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WO (1) WO2010131319A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014041637A1 (fr) * 2012-09-12 2014-03-20 三菱電機株式会社 Induit de machine électrique tournante et son procédé de fabrication
JP2016220393A (ja) * 2015-05-20 2016-12-22 三映電子工業株式会社 樹脂モールドコイル及びその製造方法
CN112583216A (zh) * 2019-09-27 2021-03-30 北京金风科创风电设备有限公司 发电机定子组件及其绝缘处理方法、模具
WO2021241113A1 (fr) * 2020-05-29 2021-12-02 パナソニックＩｐマネジメント株式会社 Bobine, stator comprenant ladite bobine et moteur
WO2022249828A1 (fr) * 2021-05-28 2022-12-01 パナソニックＩｐマネジメント株式会社 Stator et procédé de fabrication de stator
JP7444733B2 (ja) 2020-08-19 2024-03-06 株式会社Subaru ステータの製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008160938A (ja) * 2006-12-21 2008-07-10 Toyota Motor Corp モータの固定子、及び固定子の製造方法
JP2009072055A (ja) * 2007-08-21 2009-04-02 Toyota Motor Corp 分割固定子、モータ、及び分割固定子製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008160938A (ja) * 2006-12-21 2008-07-10 Toyota Motor Corp モータの固定子、及び固定子の製造方法
JP2009072055A (ja) * 2007-08-21 2009-04-02 Toyota Motor Corp 分割固定子、モータ、及び分割固定子製造方法

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014041637A1 (fr) * 2012-09-12 2014-03-20 三菱電機株式会社 Induit de machine électrique tournante et son procédé de fabrication
CN104620475A (zh) * 2012-09-12 2015-05-13 三菱电机株式会社 旋转电机的电枢及其制造方法
JP5837213B2 (ja) * 2012-09-12 2015-12-24 三菱電機株式会社 回転電機の電機子およびその製造方法
CN104620475B (zh) * 2012-09-12 2017-04-05 三菱电机株式会社 旋转电机的电枢及其制造方法
US9893594B2 (en) 2012-09-12 2018-02-13 Mitsubishi Electric Corporation Armature of rotating electrical machine and method for manufacturing same
JP2016220393A (ja) * 2015-05-20 2016-12-22 三映電子工業株式会社 樹脂モールドコイル及びその製造方法
CN112583216A (zh) * 2019-09-27 2021-03-30 北京金风科创风电设备有限公司 发电机定子组件及其绝缘处理方法、模具
WO2021241113A1 (fr) * 2020-05-29 2021-12-02 パナソニックＩｐマネジメント株式会社 Bobine, stator comprenant ladite bobine et moteur
EP4160878A4 (fr) * 2020-05-29 2023-12-06 Panasonic Intellectual Property Management Co., Ltd. Bobine, stator comprenant ladite bobine et moteur
JP7444733B2 (ja) 2020-08-19 2024-03-06 株式会社Subaru ステータの製造方法
WO2022249828A1 (fr) * 2021-05-28 2022-12-01 パナソニックＩｐマネジメント株式会社 Stator et procédé de fabrication de stator

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JP5093362B2 (ja) 2012-12-12

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