WO2023243685A1 - ステータ及びモータ - Google Patents

ステータ及びモータ Download PDF

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Publication number
WO2023243685A1
WO2023243685A1 PCT/JP2023/022252 JP2023022252W WO2023243685A1 WO 2023243685 A1 WO2023243685 A1 WO 2023243685A1 JP 2023022252 W JP2023022252 W JP 2023022252W WO 2023243685 A1 WO2023243685 A1 WO 2023243685A1
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WO
WIPO (PCT)
Prior art keywords
yoke
terminal
stator
plate
axial direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/022252
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
一樹 岩▲崎▼
持田　貴志
充俊 棗田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2024528941A priority Critical patent/JP7845468B2/ja
Priority to CN202380047355.3A priority patent/CN119384786A/zh
Publication of WO2023243685A1 publication Critical patent/WO2023243685A1/ja
Priority to US18/976,508 priority patent/US20250105695A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • 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
    • H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations

Definitions

  • Patent Document 1 includes a rotor having a plurality of magnetic poles spaced apart in the circumferential direction, and a stator surrounding the rotor, and the stator includes an annular stator core formed by molding magnetic powder.
  • the stator core has an annular yoke and a plurality of teeth that are formed protruding from the inner periphery of the yoke and are spaced apart from each other across slots in the circumferential direction of the yoke, and each tooth is provided at both ends of the stator core in the axial direction.
  • An electric motor is disclosed in which a groove for winding a coil is provided.
  • the present invention was made in order to solve the above problems, and an object of the present invention is to provide a stator that can realize electrical conduction of the coil while suppressing a decrease in manufacturing efficiency and strength. That is. Another object of the present invention is to provide a motor having the stator described above.
  • the motor of the present invention is characterized by comprising the stator of the present invention and a rotor provided opposite to the inner circumferential surface of the stator.
  • a stator that can realize electrical derivation of the coil while suppressing a decrease in manufacturing efficiency and strength. Further, according to the present invention, a motor having the stator described above can be provided.
  • FIG. 1 is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic perspective view showing the coil unit in FIG. 1.
  • FIG. 3 is a schematic perspective view showing the split core in FIG. 2.
  • FIG. 4 is a schematic perspective view showing an example of an exploded state of the split core and terminal plate in FIG. 2.
  • FIG. 5 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 1 of Embodiment 1 of the present invention.
  • FIG. 6 is a schematic perspective view showing an example of an exploded state of the split core and terminal plate in FIG. 5.
  • FIG. 5 is a schematic perspective view showing an example of an exploded state of the split core and terminal plate in FIG. 5.
  • FIG. 7 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 2 of Embodiment 1 of the present invention.
  • FIG. 8 is a schematic perspective view showing an example of an exploded state of the split core and terminal plate in FIG. 7.
  • FIG. 9 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 3 of Embodiment 1 of the present invention.
  • FIG. 10 is a schematic perspective view showing the split core and terminal plate in FIG. 9 in an exploded state.
  • FIG. 11 is a schematic perspective view showing a coil unit constituting an example of a stator according to Embodiment 2 of the present invention.
  • FIG. 12 is a schematic perspective view showing an example of a state in which the split core and terminal plate in FIG.
  • FIG. 13 is a schematic cross-sectional view showing an example of a cross section of the coil unit (excluding the winding) shown in FIG. 11 along line segment a1-a2.
  • FIG. 14 is a schematic perspective view showing a coil unit constituting an example of a stator according to Embodiment 3 of the present invention.
  • FIG. 15 is a schematic perspective view showing the split core and terminal plate in FIG. 14 in an exploded state.
  • FIG. 16 is a schematic perspective view showing a coil unit constituting an example of a stator according to Embodiment 4 of the present invention.
  • FIG. 17 is a schematic perspective view showing an example of an exploded state of the split core and terminal plate in FIG. 16.
  • FIG. 18 is a schematic perspective view showing a coil unit constituting an example of a stator according to Embodiment 5 of the present invention.
  • FIG. 19 is a schematic perspective view showing an example of a state in which the split core and terminal plate in FIG. 18 are disassembled.
  • FIG. 20 is a schematic cross-sectional view showing an example of a cross section of the coil unit (excluding the winding) shown in FIG. 18 along line b1-b2.
  • FIG. 21 is a schematic perspective view showing a coil unit constituting an example of a stator according to Embodiment 6 of the present invention.
  • FIG. 22 is a schematic perspective view showing an example of a state in which the split core and terminal plate in FIG. 21 are disassembled.
  • FIG. 22 is a schematic perspective view showing an example of a state in which the split core and terminal plate in FIG. 21 are disassembled.
  • the stator of the present invention and the motor of the present invention will be explained.
  • the present invention is not limited to the following configuration, and may be modified as appropriate without departing from the gist of the present invention.
  • the present invention also includes a combination of a plurality of individual preferred configurations described below.
  • the stator of the present invention has an annular yoke along the circumferential direction, teeth protruding from the inner circumferential surface of the yoke in the radial direction of the yoke, and a stator core made of a molded body of magnetic powder. , a coil configured with a winding wound around the teeth, and a terminal plate fixed to an end surface of the yoke in the axial direction of the stator core, the terminal plate including a plate portion and the plate portion. a terminal portion fixed to the terminal portion, and the plate portion has a first main surface located on the end surface side of the yoke in the axial direction, and a second main surface located on the opposite side of the end surface of the yoke. a main surface, the terminal portion protrudes in the axial direction from at least the second main surface of the plate portion, and one end of the winding is fixed while being wound around the terminal portion. It is characterized by being
  • FIG. 1 is a schematic perspective view showing an example of a stator according to Embodiment 1 of the present invention.
  • the stator 20A shown in FIG. 1 includes a stator core 30A, a plurality of coils 40A, and a plurality of terminal plates 50A.
  • the stator core 30A includes a yoke (also called a core back) 31 and a plurality of teeth 32.
  • the direction in which the axis of the stator core extends is defined as the axial direction. Further, the direction along the outer peripheral surface of the yoke when viewed from the axial direction is defined as the circumferential direction. Furthermore, the direction perpendicular to the axial direction and in which the outer circumferential surface and the inner circumferential surface of the yoke face each other is defined as the radial direction.
  • the plurality of teeth 32 independently protrude from the inner peripheral surface of the yoke 31 in the radial direction of the yoke 31 so as to be spaced apart from each other in the circumferential direction. In this way, the plurality of teeth 32 are integrated with the yoke 31.
  • the stator core 30A is composed of a molded body of magnetic powder. That is, the yoke 31 and teeth 32 of the stator core 30A are integrally formed of a molded body of magnetic powder.
  • the stator core 30A may be composed of a molded body of a composite material containing magnetic powder and resin instead of a powder magnetic core.
  • Each of the plurality of coils 40A is composed of a winding 41 wound around the teeth 32.
  • the plurality of coils 40A are each independently provided on the teeth 32 so as to be spaced apart from each other in the circumferential direction.
  • the plurality of coils 40A include a coil configured with a U-phase winding, a coil configured with a V-phase winding, and a coil configured with a W-phase winding.
  • the U-phase winding, V-phase winding, and W-phase winding are connected by star connection or delta connection.
  • winding wire 41 examples include polyurethane copper wire (UEW).
  • UEW polyurethane copper wire
  • the plate portion 51 is preferably made of an insulating material.
  • Examples of the insulating material constituting the plate portion 51 include resins such as polyphenylene sulfide (PPS).
  • PPS polyphenylene sulfide
  • the terminal portion 52a and the terminal portion 52b are fixed to the plate portion 51.
  • the terminal portions 52a and 52b are preferably made of a conductive material.
  • one end 41a of the winding 41 and a terminal of a connection board, which will be described later, can be easily connected via the terminal portion 52a.
  • the other end 41b of the winding 41 and a terminal of a connection board, which will be described later, can be easily connected via the terminal portion 52b.
  • the three-dimensional shapes of the terminal portion 52a and the terminal portion 52b are preferably the same, but may be different from each other.
  • the terminal plate 50A is fixed to the end surface 31a of the yoke 31 via an insulating member (not shown). That is, it is preferable that an insulating member be interposed between the end surface 31a of the yoke 31 and the first main surface 51a of the plate portion 51. In this case, insulation between the yoke 31 and the terminal plate 50A, particularly insulation between the yoke 31 and the terminal portion 52a, and insulation between the yoke 31 and the terminal portion 52b is ensured.
  • the insulating member may be an insulating film that covers at least one of the end surface 31a of the yoke 31 and the first main surface 51a of the plate portion 51.
  • the end surface 31a of the yoke 31 may be covered with an insulating film
  • the first main surface 51a of the plate portion 51 may be covered with an insulating film
  • the end surface 31a of the yoke 31 and the plate portion 51 may be covered with an insulating film.
  • the first main surface 51a may be covered with an insulating film.
  • the entire surface of the stator core 30A is covered with the insulating film. Note that when the end surface 31a of the yoke 31 is covered with an insulating film, the entire surface of the stator core 30A does not need to be covered.
  • the entire surface of the plate portion 51 is covered with the insulating film. Note that when the first main surface 51a of the plate part 51 is covered with an insulating film, the entire surface of the plate part 51 does not need to be covered.
  • a method for coating target surfaces such as the end surface 31a of the yoke 31 and the first main surface 51a of the plate portion 51 with an insulating film for example, a method of coating the target surfaces with an insulating material by a coating method such as electrodeposition coating is used. etc.
  • the insulating member may be an insulating sheet formed in advance from an insulating material.
  • the insulating sheet is disposed at least between the end surface 31a of the yoke 31 and the first main surface 51a of the plate portion 51.
  • the first main surface 51a of the plate portion 51 does not need to be covered with an insulating film.
  • the terminal portion 52a and the terminal portion 52b are exposed from the first main surface 51a of the plate portion 51 as described later, the terminal portion 52a and the terminal portion exposed from the first main surface 51a of the plate portion 51
  • the exposed portion of 52b is preferably covered with an insulating film.
  • One end 41a of the winding 41 is fixed and wound around the terminal 52a. Thereby, one end 41a of the winding 41 is led out to the terminal plate 50A.
  • One end portion 41a of the winding 41 may be wound around the terminal portion 52a and then fixed to the terminal portion 52a by soldering or the like.
  • one end portion 41a of the winding 41 may be wound around the terminal portion 52a and then fixed to the terminal portion 52a and a terminal of a connection board to be described later by soldering or the like.
  • the other end 41b of the winding 41 is fixed and wound around the terminal portion 52b. In this case, the other end 41b of the winding 41 is led out to the terminal plate 50A.
  • the other end 41b of the winding 41 may be wound around the terminal portion 52b and then fixed to the terminal portion 52b by soldering or the like.
  • the other end portion 41b of the winding 41 may be wound around the terminal portion 52b and then fixed to the terminal portion 52b and a terminal of a connection board to be described later by soldering or the like.
  • stator 20A it is sufficient that there is at least one coil 40A fixed with one end 41a of the winding 41 wound around the terminal part 52a, and for all the coils 40A, the winding 41 is fixed. It is preferable that one end portion 41a is fixed in a state where it is wrapped around the terminal portion 52a.
  • one end 41a of the winding 41 is fixed in a state wound around the terminal part 52a, and the other end 41b of the winding 41 is fixed. It is particularly preferable that it is fixed in a state where it is tied around the terminal portion 52b.
  • the one end 41a of the winding 41 is fixed.
  • the coil 40A that is fixed in a state where it is wound around the terminal part 52a and the other end part 41b of the winding 41 is not fixed in a state in which it is wound around the terminal part 52b.
  • the stator 20A by utilizing the terminal plate 50A fixed to the end surface 31a of the yoke 31, electrical derivation of the coil 40A, for example, for electrical connection to a wiring board to be described later, is possible. Electrical derivation of the coil 40A is realized.
  • stator 20A When manufacturing the stator 20A, there is no need to perform additional processing on the molded stator core 30A in order to fix the terminal plate 50A to the end surface 31a of the yoke 31, as will be described later. Therefore, a decrease in manufacturing efficiency of the stator 20A is suppressed.
  • stator 20A When manufacturing the stator 20A, there is no need to perform additional processing on the molded stator core 30A in order to fix the terminal plate 50A to the end surface 31a of the yoke 31, as described later. Therefore, when manufacturing the stator 20A, the stator core 30A is not damaged, and as a result, a decrease in the strength of the stator 20A (more specifically, the stator core 30A) is suppressed.
  • stator 20A it is possible to electrically lead out the coil 40A while suppressing a decrease in manufacturing efficiency and a decrease in strength.
  • the provision of the terminal plate 50A does not reduce the space factor of the coil 40A (winding 41). This ensures the output density of the motor incorporating the stator 20A.
  • stator of the present invention a stator in which a plurality of coil units are arranged in a ring shape in the circumferential direction will be cited, and the manner in which the terminal plate and the end surface of the yoke are fixed in each coil unit will be described.
  • the stator of the present invention may include a plurality of coil units arranged in an annular manner in the circumferential direction, and each of the plurality of coil units independently has a divided core formed by dividing the stator core in the circumferential direction. , the above-mentioned coil, and the above-mentioned terminal board.
  • the stator 20A shown in FIG. 1 is made up of a plurality of coil units 70A arranged in a ring shape in the circumferential direction.
  • FIG. 2 is a schematic perspective view showing the coil unit in FIG. 1.
  • FIG. 3 is a schematic perspective view showing the split core in FIG. 2.
  • FIG. 4 is a schematic perspective view showing the split core and terminal plate in FIG. 2 in an exploded state.
  • the coil is not shown in order to make the structure of the split core and the terminal plate easier to understand.
  • the coils are not shown in the subsequent drawings in which the split cores and terminal plates are shown in an exploded state.
  • the coil unit 70A shown in FIG. 2 includes a split core 80A, a coil 40A, and a terminal plate 50A.
  • the split core 80A is formed by dividing the stator core 30A in the circumferential direction.
  • the stator core 30A is made up of a plurality of divided cores 80A arranged in an annular manner in the circumferential direction.
  • the split core 80A includes a split yoke 81 and teeth 32.
  • the divided yoke 81 is formed by dividing the yoke 31 in the circumferential direction.
  • the split core 80A is composed of a molded body of magnetic powder. That is, the split yoke 81 and teeth 32 of the split core 80A are integrally formed of a molded body of magnetic powder.
  • the outer periphery of the split core 80A along the circumferential direction may be curved or linear, for example, The shape may be a combination of a curved shape and a straight shape.
  • the mode in which the split yokes 81 whose outer peripheries have the above-described shape when viewed from the axial direction are arranged in the circumferential direction is included in the mode in which the yoke 31 is annular along the circumferential direction.
  • the teeth 32 are preferably thinner on the split yoke 81 side than on the opposite side to the split yoke 81 in at least one of the axial and circumferential directions. In the example shown in FIG. 3, the teeth 32 are thinner in the circumferential direction on the side of the split yoke 81 than on the side opposite to the split yoke 81.
  • the thinner part can be used as the winding axis of the coil 40A.
  • the number of turns of the coil 40A can be increased.
  • the magnetic flux passing through the coil 40A tends to increase, and thus the output torque of the motor tends to improve.
  • the end surface of the yoke and the first main surface of the plate portion may be mated at a mating portion.
  • the mating portion includes a convex portion protruding in the axial direction from one of the end surface of the yoke and the first main surface of the plate portion, and the end surface of the yoke and the first main surface of the plate portion.
  • a concave portion recessed in the axial direction from the other side of the first main surface of the plate portion may be fitted together.
  • the split yoke 81 of the split core 80A is provided with a recess 86b and a recess 86c that are recessed in the axial direction from the end surface 81a.
  • the recess 86b and the recess 86c are provided at the periphery of the end surface 81a of the split yoke 81. More specifically, the recess 86b and the recess 86c are provided from the end surface 81a of the split yoke 81 to the inner peripheral surface of the split yoke 81 in the radial direction.
  • the mating portion 90A includes a mating portion 90ba formed by mating the concave portion 86b and the convex portion 55b, and a mating portion 90ca formed by mating the concave portion 86c and the convex portion 55c. That is, in the coil unit 70A, the terminal plate 50A is fixed to the end surface 81a of the split yoke 81 because the concave portion 86b and the convex portion 55b are engaged, and the concave portion 86c and the convex portion 55c are engaged. .
  • a recess 86b and a recess 86c are provided on the end surface 81a of the split yoke 81, and the recess 86b and the recess 86c are molded at the same time as the split core 80A is molded. That is, when manufacturing the coil unit 70A, there is no need to perform additional processing on the molded split core 80A in order to provide the recesses 86b and 86c on the end face 81a of the split yoke 81. Therefore, a decrease in manufacturing efficiency of the coil unit 70A is suppressed.
  • the split core 80A when manufacturing the coil unit 70A, when providing the recesses 86b and 86c on the end face 81a of the split yoke 81, the split core 80A is not damaged, so the coil unit 70A (more specifically, the split core 80A ) is suppressed from decreasing in strength.
  • the winding 41 extends toward the terminal portion 52a so as to be in contact with the convex portion 55b on the one end portion 41a side.
  • the winding 41 extends toward the terminal portion 52a so as to be in contact with the convex portion 55b on the one end portion 41a side. Thereby, when the one end 41a of the winding 41 is led out to the terminal part 52a, the winding 41 is connected to the boundary between the end surface 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81 on the one end 41a side. Since this can be avoided, breakdown of the insulation coating of the winding 41 is prevented.
  • the winding 41 extends toward the terminal portion 52b so as to be in contact with the convex portion 55c on the other end portion 41b side. In this case, when the other end 41b of the winding 41 is led out to the terminal part 52b, the winding 41 is connected to the boundary between the end surface 81a of the split yoke 81 and the inner peripheral surface of the split yoke 81 on the other end 41b side. Since this can be avoided, breakdown of the insulation coating of the winding 41 is prevented.
  • the inner end of the terminal plate is not located inside the inner end of the yoke in the radial direction.
  • the inner end of the terminal plate 50A is not located inside the inner end of the split yoke 81 in the radial direction. However, as shown in FIG. 2, they may be located at the same position, or may be located outside.
  • the outer end of the terminal plate 50A may be located inside the outer end of the split yoke 81 (more specifically, the end surface 81a of the split yoke 81) in the radial direction. , may be located at the same position or may be located outside.
  • the outer end of the terminal plate 50A is located outside the outer end of the split yoke 81 (more specifically, the end surface 81a of the split yoke 81) in the circumferential direction. It is preferable not to.
  • the plurality of coil units 70A can be manufactured without interfering with each other when manufacturing the stator 20A. It becomes easier to arrange them in a ring shape in the circumferential direction.
  • the engagement portion that engages the end surface of the yoke and the first main surface of the plate portion is not limited to the embodiment shown in FIG. 4. Other aspects of the engagement portion that engages the end surface of the yoke and the first main surface of the plate portion will be described below by citing other embodiments.
  • FIG. 5 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 1 of Embodiment 1 of the present invention.
  • FIG. 6 is a schematic perspective view showing the divided core and terminal plate in FIG. 5 in an exploded state.
  • the split yoke 81 of the split core 80B is provided with a convex portion 85b and a convex portion 85c that protrude in the axial direction from the end surface 81a.
  • the convex portion 85b and the convex portion 85c are provided at the periphery of the end surface 81a of the split yoke 81.
  • the convex portion 85b is spaced apart from the convex portion 85c in the circumferential direction.
  • the plate portion 51 of the terminal board 50B is provided with a recess 56b and a recess 56c that are recessed in the axial direction from the first main surface 51a.
  • the mating portion 90B includes a mating portion 90bb formed by mating the convex portion 85b and the recess 56b, and a mating portion 90cb formed by mating the convex portion 85c and the concave portion 56c. That is, in the coil unit 70B, the terminal plate 50B is fixed to the end surface 81a of the split yoke 81 because the convex portion 85b and the concave portion 56b are engaged, and the convex portion 85c and the concave portion 56c are engaged. .
  • the end surface 81a of the split yoke 81 and the first main surface 51a of the plate part 51 are fitted together at the fitting part 90B, so that the terminal plate 50B is attached to the end surface of the split yoke 81. 81a, and positioning of the terminal plate 50B becomes easier.
  • FIG. 7 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 2 of Embodiment 1 of the present invention.
  • FIG. 8 is a schematic perspective view showing the divided core and terminal plate in FIG. 7 in an exploded state.
  • the split yoke 81 of the split core 80C is provided with a convex portion 85a that projects in the axial direction from the end surface 81a. Further, the split yoke 81 of the split core 80C is provided with a recess 86b and a recess 86c that are recessed in the axial direction from the end surface 81a.
  • the convex portion 85a, the concave portion 86b, and the concave portion 86c are provided at the periphery of the end surface 81a of the split yoke 81.
  • the convex portion 55c is located outside the concave portion 56a in the circumferential direction. Further, the convex portion 55c is located inside the concave portion 56a in the radial direction.
  • the end surface 81a of the split yoke 81 and the first main surface 51a of the plate part 51 are fitted together at the fitting part 90C. 81a, and positioning of the terminal plate 50C becomes easier.
  • the mating parts 90C shown in FIG. 8, here, the mating parts 90ab, 90ba, and 90ca, are connected to the peripheral edge of the end surface 81a of the split yoke 81 and the first part of the plate part 51 in the axial direction. It overlaps with the periphery of the main surface 51a.
  • the fitting portion includes a first fitting portion and a second fitting portion located inside the first fitting portion in the radial direction.
  • the mating part 90C shown in FIG. 8 includes a mating part 90ab and a mating part 90ba or a mating part 90ca located inside the mating part 90ab in the radial direction. That is, in the mating part 90C, the mating part 90ab corresponds to the first mating part, and the mating part 90ba or the mating part 90ca corresponds to the second mating part.
  • the terminal plate 50C is divided by providing the fitting portions that fit the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 separately so as to be separated from each other in the radial direction. This makes it difficult for the yoke 81 to shift from the end surface 81a.
  • the mating part includes a third mating part located inside the first mating part in the radial direction and separated from the second mating part in the circumferential direction. It is preferable that it further contains.
  • the mating part 90C shown in FIG. 8 includes a mating part 90ba and a mating part 90ca that are located inside the mating part 90ab in the radial direction and are spaced apart from each other in the circumferential direction. That is, in the mating part 90C, the mating part 90ab corresponds to the first mating part, one of the mating part 90ba and the mating part 90ca corresponds to the second mating part, and the mating part 90ba and the mating part 90ca correspond to the second mating part. The other of the mating portions 90ca corresponds to the third mating portion.
  • the fitting portions for fitting the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are provided separately so as to be separated in the radial direction and the circumferential direction, so that the terminal board 50C becomes extremely difficult to shift from the end face 81a of the split yoke 81.
  • FIG. 8 illustrates a mode in which three mating parts are provided in one set of the divided yoke 81 and the plate part 51
  • the total number of mating parts is not particularly limited. That is, in one set of the divided yoke 81 and the plate part 51, one or more fitting parts may be provided.
  • FIG. 8 an embodiment is illustrated in which the engagement portions that fit the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are provided so as to be separated in the radial direction. , may not be provided so as to be spaced apart in the radial direction.
  • FIG. 8 an embodiment is illustrated in which the engagement portions that fit the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are provided so as to be spaced apart in the circumferential direction. , may not be provided so as to be spaced apart in the circumferential direction.
  • FIG. 9 is a schematic perspective view showing a coil unit constituting an example of a stator of Modification 3 of Embodiment 1 of the present invention.
  • FIG. 10 is a schematic perspective view showing the divided core and terminal plate in FIG. 9 in an exploded state.
  • the coil unit 70D shown in FIG. 9 includes a split core 80D, a coil 40A, and a terminal plate 50D.
  • the split yoke 81 of the split core 80D is provided with a recess 86a, a recess 86b, and a recess 86c that are recessed in the axial direction from the end surface 81a.
  • the recess 86a, the recess 86b, and the recess 86c are provided at the periphery of the end surface 81a of the split yoke 81.
  • the recess 86a is located inside the recess 86b and the recess 86c in the circumferential direction. Further, the recess 86a is located on the outer side of the recess 86b and the recess 86c in the radial direction.
  • the recess 86b is located outside the recess 86a in the circumferential direction. Further, the recess 86b is located inside the recess 86a in the radial direction. Further, the recess 86b is spaced apart from the recess 86c in the circumferential direction.
  • the recess 86c is located outside the recess 86a in the circumferential direction. Further, the recess 86c is located inside the recess 86a in the radial direction.
  • the three-dimensional shapes of the recesses 86a, 86b, and 86c may be the same, different, or partially different.
  • the plate portion 51 of the terminal plate 50D is provided with a convex portion 55a, a convex portion 55b, and a convex portion 55c that protrude in the axial direction from the first main surface 51a.
  • the convex portion 55b is located on the outer side of the convex portion 55a in the circumferential direction. Further, the convex portion 55b is located inside the convex portion 55a in the radial direction. Furthermore, the convex portion 55b is spaced apart from the convex portion 55c in the circumferential direction.
  • the convex portion 55c is located outside the convex portion 55a in the circumferential direction. Further, the convex portion 55c is located inside the convex portion 55a in the radial direction.
  • the three-dimensional shapes of the protrusions 55a, 55b, and 55c may be the same, different, or partially different.
  • the mating part 90D has a mating part 90aa in which the concave part 86a and the convex part 55a are mated, a mating part 90ba in which the concave part 86b and the convex part 55b are mated, and a mating part 90ba in which the concave part 86c and the convex part 55c are mated. It includes a mating part 90ca that is joined together.
  • the recess 86a and the protrusion 55a are engaged, the recess 86b and the protrusion 55b are engaged, and the recess 86c and the protrusion 55c are engaged, so that the terminal plate 50D is It is fixed to the end surface 81a of the split yoke 81.
  • FIG. 11 is a schematic perspective view showing a coil unit that constitutes an example of a stator according to Embodiment 2 of the present invention.
  • FIG. 12 is a schematic perspective view showing the split core and terminal plate in FIG. 11 in an exploded state.
  • FIG. 13 is a schematic cross-sectional view showing an example of a cross section of the coil unit (excluding the winding) shown in FIG. 11 along line segment a1-a2.
  • the coil unit 70E shown in FIG. 11 includes a split core 80E, a coil 40A, and a terminal plate 50E.
  • the recess 86d and the recess 86e are spaced apart from each other in the circumferential direction.
  • the three-dimensional shapes of the recess 86d and the recess 86e may be the same or different.
  • the plate portion 51 of the terminal board 50E is provided with a convex portion 55d and a convex portion 55e that protrude in the axial direction from the first main surface 51a.
  • the mating portion 90E includes a mating portion 90da in which the recess 86d and the convex portion 55d are mated, and a mating portion 90ea in which the concave portion 86e and the convex portion 55e are mated. That is, in the coil unit 70E, the terminal plate 50E is fixed to the end surface 81a of the split yoke 81 because the recess 86d and the projection 55d are engaged, and the recess 86e and the projection 55e are engaged. .
  • the concave portion 86d and the convex portion 55d overlap in the axial direction in the mating portion 90da, and the concave portion 86e and the convex portion 55e overlap in the axial direction in the mating portion 90ea.
  • the convex portion 55d and the terminal portion 52a overlap in the axial direction
  • the convex portion 55e and the terminal portion 52b overlap in the axial direction. Therefore, regarding the positional relationship between the mating part 90E and the terminal plate 50E, the mating part 90da overlaps the terminal part 52a in the axial direction, and the mating part 90ea overlaps the terminal part 52b in the axial direction.
  • the terminal plate 50E can be fixed to the end surface 81a of the split yoke 81. Positioning becomes possible.
  • a recess 86d and a recess 86e are provided on the end surface 81a of the split yoke 81, and the recess 86d and the recess 86e are molded at the same time as the split core 80E is molded. That is, when manufacturing the coil unit 70E, there is no need to perform additional processing on the molded split core 80E in order to provide the recess 86d and the recess 86e on the end face 81a of the split yoke 81. Therefore, a decrease in the manufacturing efficiency of the coil unit 70E is suppressed, and further a decrease in the strength of the coil unit 70E (more specifically, the split core 80E) is suppressed.
  • the fitting portion may be formed by fitting a recessed portion recessed from the end surface of the yoke in the axial direction with the plate portion.
  • a stator that is different from the stator of Embodiment 1 of the present invention in this respect will be described below as a stator of Embodiment 3 of the present invention.
  • FIG. 14 is a schematic perspective view showing a coil unit that constitutes an example of a stator according to Embodiment 3 of the present invention.
  • FIG. 15 is a schematic perspective view showing the split core and terminal plate in FIG. 14 in an exploded state.
  • the coil unit 70F shown in FIG. 14 includes a split core 80F, a coil 40A, and a terminal plate 50F.
  • the split yoke 81 of the split core 80F is provided with a recess 86f that is recessed in the axial direction from the end surface 81a.
  • the recess 86f is provided from the inner circumferential surface to the outer circumferential surface of the split yoke 81 in the radial direction.
  • the terminal board 50F has a plate portion 51 and a terminal portion 52a.
  • One end 41a of the winding 41 is fixed and wound around the terminal 52a. As a result, one end 41a of the winding 41 is led out to the terminal plate 50F.
  • the end surface 81a of the split yoke 81 and the first main surface 51a of the plate part 51 are fitted together at the fitting part 90F, so that the terminal plate 50F is connected to the end surface of the split yoke 81. 81a, and positioning of the terminal plate 50F becomes easier.
  • a recess 86f is provided in the end surface 81a of the split yoke 81, and the recess 86f is molded at the same time as the split core 80F is molded. That is, when manufacturing the coil unit 70F, there is no need to perform additional processing on the molded split core 80F in order to provide the recess 86f in the end face 81a of the split yoke 81. Therefore, a decrease in the manufacturing efficiency of the coil unit 70F is suppressed, and further a decrease in the strength of the coil unit 70F (more specifically, the split core 80F) is suppressed.
  • the recess 86f provided in the end surface 81a of the split yoke 81 may connect the first main surface 51a of the plate portion 51 and the end surface 81a of the split yoke 81, even if it is shallower than the screw hole described in Patent Document 1, for example. Functions when they fit together. Therefore, in the coil unit 70F, even if the recessed portion 86f is provided in the end face 81a of the split yoke 81, the influence on the magnetic properties is minimized.
  • the axial dimension of the entire coil unit can be reduced compared to, for example, the coil unit 70A.
  • the coil unit 70F can be made thinner (lower in height) in the axial direction.
  • the recess 86f and a portion of the plate portion 51 may be mated. That is, the axial dimension of the plate portion 51 may be larger than the depth of the recessed portion 86f.
  • a winding recess is provided on the periphery of the second main surface of the plate portion when viewed from the axial direction, and the winding is provided with a winding recess on one end side. Preferably, it extends toward the terminal portion so as to pass through the recess.
  • a winding recess 57a is provided at the periphery of the second main surface 51b of the plate portion 51 when viewed from the axial direction.
  • the winding 41 extends toward the terminal portion 52a so as to pass through the winding recess 57a on the one end 41a side.
  • the winding 41 is connected to the end surface 81a (recess 86f) of the split yoke 81 on the one end 41a side and the inner periphery of the split yoke 81.
  • a recess for winding is provided on the periphery of the second main surface of the plate portion when viewed from the axial direction, and the winding is disposed on one end side. It may extend toward the terminal portion so as to pass through the winding recess.
  • stator of the present invention the end surface of the yoke and the first main surface of the plate portion may be joined.
  • a stator that is different from the stator of Embodiment 1 of the present invention in this respect will be described below as a stator of Embodiment 4 of the present invention.
  • the coil unit 70G shown in FIG. 16 includes a split core 80G, a coil 40A, and a terminal plate 50G.
  • Examples of the bonding portion include adhesives and the like.
  • the terminal plate 50G is easily fixed to the end surface 81a of the split yoke 81. , positioning of the terminal plate 50G becomes easier.
  • the terminal plate 50G can be fixed to the end face 81a of the split yoke 81 with a simple structure that does not use a mating part as shown in FIG. It becomes possible to position the plate 50G.
  • the end face of the split yoke and the first main surface of the plate part are not mated. In addition to being present, they may also be joined.
  • FIG. 18 is a schematic perspective view showing a coil unit that constitutes an example of a stator according to Embodiment 5 of the present invention.
  • FIG. 19 is a schematic perspective view showing the split core and terminal plate in FIG. 18 in an exploded state.
  • FIG. 20 is a schematic cross-sectional view showing an example of a cross section of the coil unit (excluding the winding) shown in FIG. 18 along line b1-b2.
  • the coil unit 70H shown in FIG. 18 includes a split core 80H, a coil 40A, and a terminal plate 50A.
  • the split yoke 81 of the split core 80H is provided with a recess 86b and a recess 86c that are recessed in the axial direction from the end surface 81a.
  • the end face 81a of the split yoke 81 of the split core 80H is further provided with a recess 87a and a recess 87b.
  • the depression 87a and the depression 87b are spaced apart from each other in the circumferential direction.
  • the three-dimensional shapes of the depression 87a and the depression 87b may be the same or different from each other.
  • the terminal board 50A is fixed to the end surface 81a of the split yoke 81, the terminal portion 52a can be structured so as not to contact the split yoke 81. Therefore, according to the structure shown in FIG. 20, insulation between the split yoke 81 and the terminal portion 52a is ensured. Furthermore, according to the structure shown in FIG. 20, when using, for example, solder joints when electrically connecting one end 41a of the winding 41 and the terminals of the connection board as described later, solder joints are used.
  • the terminal plate 50A when the terminal plate 50A is fixed to the end surface 81a of the split yoke 81, it is sufficient that at least one of the terminal portion 52a and the terminal portion 52b is separated from the bottom surface of the recess in the axial direction. Only one of the terminal portions 52b may be separated from the bottom surface of the recess in the axial direction.
  • a recess 87a and a recess 87b are provided on the end surface 81a of the split yoke 81, and the recess 87a and the recess 87b are formed at the same time as the split core 80H is formed. That is, when manufacturing the coil unit 70H, there is no need to perform additional processing on the molded split core 80H in order to provide the recesses 87a and 87b on the end face 81a of the split yoke 81. Therefore, a decrease in the manufacturing efficiency of the coil unit 70H is suppressed, and furthermore, a decrease in the strength of the coil unit 70H (more specifically, the split core 80H) is suppressed.
  • the end face of the split yoke may be provided with a recess that overlaps the terminal portion in the axial direction, so that the terminal portion It may be spaced apart from the bottom surface of the recess in the direction.
  • the terminal portion does not need to penetrate the plate portion in the axial direction.
  • a stator that is different from the stator of Embodiment 1 of the present invention in this respect will be described below as a stator of Embodiment 6 of the present invention.
  • the coil unit 70J shown in FIG. 21 includes a split core 80A, a coil 40A, and a terminal plate 50J.
  • the split core 80A of the coil unit 70J has the same configuration as the split core 80A of the coil unit 70A. That is, as shown in FIG. 22, the split yoke 81 of the split core 80A included in the coil unit 70J is provided with a recess 86b and a recess 86c that are recessed in the axial direction from the end surface 81a.
  • the end surface 81a of the split yoke 81 and the first main surface 51a of the plate portion 51 are fitted together at a fitting portion 90A, as shown in FIG.
  • the terminal plate 50J is easily fixed to the end surface 81a of the split yoke 81, and the positioning of the terminal plate 50J is facilitated.
  • the terminal portion 52a does not penetrate the plate portion 51 in the axial direction. That is, in the terminal board 50J, the terminal portion 52a is not exposed from the first main surface 51a of the plate portion 51. This allows a structure in which the terminal portion 52a does not come into contact with the split yoke 81 while the terminal plate 50J is fixed to the end surface 81a of the split yoke 81. Therefore, according to the structure shown in FIG. 23, insulation between the split yoke 81 and the terminal portion 52a is ensured. Furthermore, according to the structure shown in FIG.
  • the terminal portion 52b of the terminal plate 50J does not penetrate the plate portion 51 in the axial direction.
  • the terminal plate 50J in the terminal plate 50J, it is sufficient that at least one of the terminal portion 52a and the terminal portion 52b does not penetrate the plate portion 51 in the axial direction, and only one of the terminal portion 52a and the terminal portion 52b passes through the plate portion 51. It does not have to penetrate in the axial direction.
  • the terminal portion 52a may axially penetrate the plate portion 51.
  • FIG. 24 is a schematic cross-sectional view showing another example of the cross section of the coil unit shown in FIG. 21 along line segment c1-c2.
  • the terminal portion 52a passes through the plate portion 51 in the axial direction.
  • the bottom portion of the terminal portion 52a may have a shape that is wider in the radial direction than the other portions. Further, in the terminal board 50J, the bottom portion of the terminal portion 52a may have a shape that is wider in the circumferential direction than the other portions. That is, in the terminal plate 50J, the bottom portion of the terminal portion 52a may have a shape that is wider than the other portion in at least one of the radial direction and the circumferential direction. Since the bottom of the terminal portion 52a has a widened shape as described above, the terminal portion 52a becomes difficult to come off from the plate portion 51 in the axial direction.
  • the terminal portion 52a may be separated from the end surface 81a of the split yoke 81 in the axial direction. That is, a cavity 88 may be provided between the terminal portion 52a and the split yoke 81.
  • the structure is such that the terminal portion 52a does not come into contact with the split yoke 81 while the terminal plate 50J is fixed to the end surface 81a of the split yoke 81. be able to. Therefore, according to the structure shown in FIG. 24, insulation between the split yoke 81 and the terminal portion 52a is ensured. Furthermore, according to the structure shown in FIG.
  • solder joints when using, for example, solder joints when electrically connecting one end 41a of the winding 41 and the terminals of the connection board as described later, solder joints are used.
  • the heat generated at the time is less likely to be transmitted from the terminal portion 52a to the split yoke 81, and as a result, the split core 80A is less likely to be damaged, so the strength of the coil unit 70J (more specifically, the split core 80A) is reduced. suppressed.
  • the terminal portion does not have to penetrate the plate portion in the axial direction.
  • the terminal board has two terminal parts, but in the stator of the present invention, the terminal board may have only one terminal part. That is, in the stator of the present invention, only one end portion of the winding may be fixed in a state where it is wrapped around the terminal portion.
  • a stator that is different from the stator of Embodiment 4 of the present invention in this respect will be described below as a stator of Embodiment 7 of the present invention.
  • FIG. 25 is a schematic perspective view showing an example of a stator according to Embodiment 7 of the present invention.
  • FIG. 26 is a schematic perspective view showing the coil unit in FIG. 25.
  • the stator 20K shown in FIG. 25 has a coil unit 70K.
  • the coil unit 70K shown in FIG. 26 includes a split core 80G, a coil 40A, and a terminal plate 50K.
  • the coils 40A can be arranged more closely, and as a result, the number of coils 40A can be increased compared to a stator in which the stator core is an integrated structure. can. Therefore, with a stator having a split stator core structure, the characteristics of the motor can be improved more easily than with a stator having an integrated stator core structure.
  • the stator of the present invention is not only used as a component of a motor, which will be described later, but may also be used, for example, as a component of a generator.
  • the motor of the present invention is characterized by comprising the stator of the present invention and a rotor provided opposite to the inner circumferential surface of the stator.
  • FIG. 27 is a schematic perspective view showing an example of a motor according to Embodiment 8 of the present invention.
  • the motor 1A shown in FIG. 27 includes a rotor 10A and a stator 20A.
  • the rotor 10A is located on the inner side of the same axis, and the stator 20A is located on the outer side of the same axis.
  • the axis AX corresponds to the rotation axis of the rotor 10A.
  • the rotor 10A is provided facing the inner peripheral surface of the stator 20A.
  • the rotor 10A includes, for example, a rotor yoke 11, a shaft 12, and a permanent magnet 13.
  • the rotor yoke 11 is composed of, for example, a bulk soft magnetic material, an electromagnetic steel plate, a dust core, a resin molded body containing a soft magnetic material, or the like.
  • the shaft 12 is inserted through the rotor yoke 11.
  • Examples of the constituent material of the shaft 12 include metals such as stainless steel.
  • the direction in which the shaft 12 extends that is, the direction in which the axis AX extends is parallel to the axial direction.
  • the permanent magnets 13 are provided so that north and south poles are alternately arranged along the outer peripheral surface of the rotor yoke 11.
  • a motor in which a plurality of coil units 70A are arranged in an annular manner in the circumferential direction, but the motor has a stator in which other coil units such as the coil unit 70B are arranged in an annular manner in the circumferential direction. The same applies to the motor.
  • the motor of the present invention may further include a wiring board electrically connected to one end of the winding.
  • a motor that is different from the motor of Embodiment 8 of the present invention in this respect will be described below as a motor of Embodiment 9 of the present invention.
  • FIG. 28 is a schematic perspective view showing an example of a motor according to Embodiment 9 of the present invention.
  • the wiring board 25A is electrically connected to one end 41a of the winding 41 of the coil 40A of the stator 20A. Furthermore, it is preferable that the wiring board 25A is electrically connected to the other end 41b of the winding 41 of the coil 40A of the stator 20A. An example of this connection mode will be described below.
  • a terminal (not shown) is exposed on the inner wall surface of each through hole 26.
  • the wiring board 25A is placed on the stator 20A so that the terminal portions 52a and 52b pass through separate through holes 26.
  • one end 41a of the winding 41 is tied and fixed to the terminal part 52a, and the other end 41b of the winding 41 is tied and fixed to the terminal part 52b. There is. Therefore, according to the state in which the wiring board 25A is placed on the stator 20A as described above, one end 41a of the winding 41 wound around the terminal part 52a and the one end 41a wound around the terminal part 52b are connected to each other. The other end 41b of the winding 41 can be efficiently connected to the terminal exposed from the inner wall surface of the separate through hole 26.
  • the mating part includes a first mating part and a second mating part located inside the first mating part in the radial direction. stator.
  • ⁇ 12> The stator according to any one of ⁇ 1> to ⁇ 11>, wherein the end surface of the yoke and the first main surface of the plate portion are joined.
  • ⁇ 14> The stator according to any one of ⁇ 1> to ⁇ 13>, wherein the terminal portion does not penetrate the plate portion in the axial direction.
  • a motor comprising: a rotor provided opposite to the inner circumferential surface of the stator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
PCT/JP2023/022252 2022-06-17 2023-06-15 ステータ及びモータ Ceased WO2023243685A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2024528941A JP7845468B2 (ja) 2022-06-17 2023-06-15 ステータ及びモータ
CN202380047355.3A CN119384786A (zh) 2022-06-17 2023-06-15 定子以及马达
US18/976,508 US20250105695A1 (en) 2022-06-17 2024-12-11 Stator and motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-098186 2022-06-17
JP2022098186 2022-06-17

Related Child Applications (1)

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US18/976,508 Continuation US20250105695A1 (en) 2022-06-17 2024-12-11 Stator and motor

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007295637A (ja) * 2006-04-20 2007-11-08 Jtekt Corp 電動モータ
JP2008278693A (ja) * 2007-05-02 2008-11-13 Sumitomo Electric Ind Ltd 回転電機用ステータ
JP2019004601A (ja) * 2017-06-14 2019-01-10 株式会社マキタ 電動工具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007295637A (ja) * 2006-04-20 2007-11-08 Jtekt Corp 電動モータ
JP2008278693A (ja) * 2007-05-02 2008-11-13 Sumitomo Electric Ind Ltd 回転電機用ステータ
JP2019004601A (ja) * 2017-06-14 2019-01-10 株式会社マキタ 電動工具

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JP7845468B2 (ja) 2026-04-14
US20250105695A1 (en) 2025-03-27
JPWO2023243685A1 (https=) 2023-12-21

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