WO2024154569A1 - ステータ及びモータ - Google Patents
ステータ及びモータ Download PDFInfo
- Publication number
- WO2024154569A1 WO2024154569A1 PCT/JP2023/047030 JP2023047030W WO2024154569A1 WO 2024154569 A1 WO2024154569 A1 WO 2024154569A1 JP 2023047030 W JP2023047030 W JP 2023047030W WO 2024154569 A1 WO2024154569 A1 WO 2024154569A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- yoke
- groove
- stator
- axial direction
- fixing portion
- 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
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Classifications
-
- 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
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- 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
- H02K1/14—Stator 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
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- 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
- H02K3/46—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 and a motor.
- Patent Document 1 discloses an electric motor that includes a rotor with multiple magnetic poles spaced apart in the circumferential direction, and a stator that surrounds the rotor, with the stator including an annular stator core formed by molding magnetic powder, and the stator core having an annular yoke and multiple teeth that protrude from the inner circumference of the yoke and are spaced apart from each other with slots between them in the circumferential direction of the yoke, and grooves for winding coils are provided at both axial ends of the stator core corresponding to each tooth.
- a bus bar is used to electrically lead out the coil, and as shown in FIG. 4 of Patent Document 1, the bus bar to which the coil is connected is fixed to the stator core by screwing.
- additional processing is required to form a screw hole in the stator core after the stator core is manufactured, so the work efficiency in the process of fixing the bus bar to the stator core is low.
- the stator core is damaged when forming the screw hole, so the strength of the stator core is reduced, and as a result, the fixing strength of the bus bar to the stator core is reduced.
- the present invention has been made to solve the above problems, and aims to provide a stator that can improve the work efficiency during installation of terminal members for electrically conducting the coil and the fixing strength after installation. Another aim of the present invention is to provide a motor having the above stator.
- the stator of the present invention has an annular yoke extending in the circumferential direction, and teeth protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and comprises a stator core made of a compact of magnetic powder, a coil made of a winding wound around the teeth, a column portion extending in the axial direction of the stator core, a first fixing portion provided at one end of the column portion in the axial direction so as to protrude toward the inner peripheral surface of the yoke further than the column portion in the radial direction, and a second fixing portion provided at the other end of the column portion in the axial direction so as to protrude toward the inner peripheral surface of the yoke further than the column portion in the radial direction.
- the yoke has a first end face and a second end face that face each other in the axial direction
- the terminal member sandwiches the yoke in the axial direction so that the column portion faces the outer peripheral surface of the yoke in the radial direction
- the first fixed portion faces the first end face of the yoke
- the second fixed portion faces the second end face of the yoke, and one end of the winding is fixed in a state where it is entangled with the terminal portion.
- the motor of the present invention is characterized by having a stator of the present invention and a rotor arranged opposite the inner peripheral surface of the stator.
- the present invention provides a stator that can improve the work efficiency during installation of terminal members for electrically conducting the coil and the fixing strength after installation.
- the present invention also provides a motor having the above stator.
- FIG. 1 is a schematic perspective view showing an example of a stator according to a first embodiment of the present invention.
- FIG. 2 is a schematic perspective view showing the coil unit in FIG. 1 as viewed from the inside.
- FIG. 3 is a schematic perspective view showing the coil unit in FIG. 1 as viewed from the outside.
- FIG. 4 is a schematic perspective view showing the split cores in FIGS. 2 and 3.
- FIG. 5 is a schematic perspective view showing the terminal member in FIGS. 2 and 3.
- FIG. 6 is a schematic cross-sectional view showing a part of a cross section taken along line A-A' of the terminal member in FIG.
- FIG. 7 is a schematic perspective view showing a state in which a housing is attached to the stator shown in FIG. FIG.
- FIG. 8 is a schematic perspective view showing an example of a coil unit constituting a stator according to the second embodiment of the present invention.
- FIG. 9 is a schematic perspective view showing the split core in FIG.
- FIG. 10 is a schematic perspective view showing the terminal member in FIG.
- FIG. 11 is a schematic perspective view showing an example of a coil unit constituting a stator according to the third embodiment of the present invention.
- FIG. 12 is a schematic perspective view showing the split core in FIG.
- FIG. 13 is a schematic perspective view showing the terminal member in FIG.
- FIG. 14 is a schematic perspective view showing an example of a coil unit constituting a stator according to the fourth embodiment of the present invention.
- FIG. 15 is a schematic perspective view showing the split core in FIG. FIG.
- FIG. 16 is a schematic perspective view showing the terminal member in FIG.
- FIG. 17 is a schematic perspective view showing an example of a coil unit constituting a stator according to the fifth embodiment of the present invention.
- FIG. 18 is a schematic perspective view showing the split core in FIG.
- FIG. 19 is a schematic perspective view showing the terminal member in FIG.
- FIG. 20 is a schematic perspective view showing an example of a coil unit constituting a stator according to the sixth embodiment of the present invention.
- FIG. 21 is a schematic perspective view showing the split core in FIG. 20.
- FIG. 22 is a schematic perspective view showing the terminal member in FIG. 20 .
- FIG. 23 is a schematic perspective view showing an example of a coil unit constituting a stator according to the seventh embodiment of the present invention.
- FIG. 23 is a schematic perspective view showing an example of a coil unit constituting a stator according to the seventh embodiment of the present invention.
- FIG. 24 is a schematic perspective view showing the split core in FIG. 23 .
- FIG. 25 is a schematic perspective view showing the terminal member in FIG. 23 .
- FIG. 26 is a schematic perspective view showing an example of a coil unit constituting a stator according to the eighth embodiment of the present invention.
- FIG. 27 is a schematic perspective view showing the split core in FIG. 26 .
- FIG. 28 is a schematic perspective view showing the terminal member in FIG. 26 .
- FIG. 29 is a schematic perspective view showing an example of a stator according to a ninth embodiment of the present invention.
- FIG. 30 is a schematic perspective view showing an example of a motor according to the present invention.
- stator and motor of the present invention will be described below. Note that the present invention is not limited to the configurations below, and may be modified as appropriate without departing from the spirit of the present invention. In addition, a combination of multiple individual preferred configurations described below also constitutes the present invention.
- the stator of the present invention has an annular yoke extending along a circumferential direction, and teeth protruding from an inner peripheral surface of the yoke in a radial direction of the yoke, and comprises a stator core made of a compact of magnetic powder, a coil made of a winding wound around the teeth, a column portion extending in an axial direction of the stator core, a first fixing portion provided at one end of the column portion in the axial direction so as to protrude toward the inner peripheral surface of the yoke further than the column portion in the radial direction, and a second fixing portion provided at another end of the column portion in the axial direction so as to protrude toward the inner peripheral surface of the yoke further than the column portion in the radial direction.
- the terminal member having a second fixed portion provided at one end of the yoke and a terminal portion provided on the first fixed portion so as to protrude from the first fixed portion, wherein the yoke has a first end face and a second end face facing each other in the axial direction, the terminal member clamps the yoke in the axial direction so that the pillar portion faces the outer circumferential surface of the yoke in the radial direction, the first fixed portion faces the first end face of the yoke, and the second fixed portion faces the second end face of the yoke, and one end of the winding is fixed in a wound state around the terminal portion.
- a first end surface of the yoke is fitted to a first fixed portion. More specifically, in the stator according to the first embodiment of the present invention, a first groove is provided in the first end surface of the yoke so as to open to an outer peripheral surface side of the yoke in the radial direction, and the first groove is fitted to the first fixed portion.
- the second end face of the yoke and the second fixed portion are engaged. More specifically, in the stator of embodiment 1 of the present invention, a second groove is provided in the second end face of the yoke so as to open toward the outer peripheral surface side of the yoke in the radial direction, and the second groove and the second fixed portion are engaged.
- 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 has a stator core 30A, a number of coils 40A, and a number of terminal members 50A.
- the stator core 30A has a yoke (also called a core back) 31 and a number of teeth 32.
- the direction in which the axis of the stator core extends is defined as the axial direction.
- the direction along the outer peripheral surface of the yoke when viewed from the axial direction is defined as the circumferential direction.
- the direction perpendicular to the axial direction and in which the outer peripheral surface and inner peripheral surface of the yoke face each other is defined as the radial direction.
- the yoke 31 is annular in the circumferential direction.
- the yoke 31 has a first end face 31a and a second end face 31b that face each other in the axial direction.
- the yoke 31 has an outer peripheral surface 31c and an inner peripheral surface 31d that face each other in the radial direction.
- the multiple teeth 32 protrude independently from the inner peripheral surface 31d of the yoke 31 in the radial direction of the yoke 31 so as to be spaced apart from one another in the circumferential direction. In this way, the multiple teeth 32 are integrated with the yoke 31.
- two elements being integrated means that there is no interface between the elements, for example, it means that the boundary between the elements cannot be distinguished.
- the stator core 30A is made of a compact of magnetic powder.
- the yoke 31 and teeth 32 are integrally made of a compact of magnetic powder.
- the stator core 30A is preferably made of a powder magnetic core.
- the yoke 31 and the teeth 32 are preferably made integrally of a powder magnetic core.
- the stator core 30A may be made of a compact of a composite material containing magnetic powder and resin, rather than a powder magnetic core.
- Each of the multiple coils 40A is composed of a winding 41 wound around the teeth 32.
- the multiple coils 40A are each independently provided on the teeth 32 so as to be spaced apart from each other in the circumferential direction.
- Each of the multiple coils 40A is insulated from the teeth 32, for example, via an insulating member described below.
- the windings 41 of the multiple coils 40A are connected, for example, in series.
- the winding 41 can be, for example, polyurethane copper wire (UEW).
- UEW polyurethane copper wire
- Each of the multiple terminal members 50A has a pillar portion 51, a first fixing portion 52, a second fixing portion 53, and a terminal portion 54.
- the column portion 51 extends in the axial direction.
- the first fixing portion 52 is provided at one end of the pillar portion 51 in the axial direction (the upper end of the pillar portion 51 in FIG. 1) so as to protrude radially toward the inner peripheral surface 31d of the yoke 31 beyond the pillar portion 51.
- the first fixing portion 52 may protrude beyond the pillar portion 51 in the circumferential direction as shown in FIG. 1, or may not protrude beyond the pillar portion 51.
- the first fixing portion 52 may be integral with the pillar portion 51.
- the first fixing portion 52 is, for example, integrally molded with the pillar portion 51.
- the first fixing portion 52 does not have to be integrated with the pillar portion 51.
- the first fixing portion 52 is, for example, a separate member from the pillar portion 51 and is fixed to the pillar portion 51 by a method such as joining.
- the first fixing portion 52 is integrated with the pillar portion 51.
- the second fixing portion 53 is provided at the other end of the pillar portion 51 in the axial direction (the lower end of the pillar portion 51 in FIG. 1) so as to protrude radially toward the inner peripheral surface 31d of the yoke 31 beyond the pillar portion 51.
- the second fixing portion 53 may protrude beyond the pillar portion 51 in the circumferential direction as shown in FIG. 1, or may not protrude beyond the pillar portion 51.
- the second fixing portion 53 may be integral with the pillar portion 51.
- the second fixing portion 53 is, for example, integrally molded with the pillar portion 51.
- the second fixing portion 53 does not have to be integrated with the pillar portion 51.
- the second fixing portion 53 is, for example, a separate member from the pillar portion 51 and is fixed to the pillar portion 51 by a method such as joining.
- the second fixing portion 53 is integrated with the pillar portion 51.
- the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 are each independently made of an insulating material.
- Examples of insulating materials constituting the column portion 51, the first fixing portion 52, and the second fixing portion 53 include resins such as nylon and polyphenylene sulfide (PPS).
- the constituent materials of the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 may be the same as each other, may be different from each other, or may be partially different.
- the terminal member 50A has one terminal portion 54.
- the terminal portion 54 is provided on the first fixed portion 52 so as to protrude from the first fixed portion 52.
- terminal portion 54 protrudes from the first fixed portion 52 toward the opposite side to the second fixed portion 53 in the axial direction.
- the terminal portion 54 may be integrated with the first fixed portion 52.
- the terminal portion 54 is, for example, integrally molded with the first fixed portion 52.
- the terminal portion 54 does not have to be integrated with the first fixed portion 52.
- the terminal portion 54 is fixed to the first fixed portion 52 by, for example, pressing, as a separate member from the first fixed portion 52.
- the terminal portion 54 is preferably made of a conductive material. In this case, one end 41a of the winding 41, which will be described later, can be easily connected to a terminal of the wiring board via the terminal portion 54.
- Examples of the conductive material that constitutes the terminal portion 54 include metals such as phosphor bronze.
- the terminal portion 54 may be made of an insulating material. In this case, there is no need to consider insulation between the terminal portion 54 and the stator core 30A, which increases the freedom of arrangement of the terminal portion 54 relative to the first fixed portion 52.
- Examples of the insulating material that constitutes the terminal portion 54 include resins such as nylon and polyphenylene sulfide.
- the three-dimensional shape of the terminal portion 54 can be, for example, a rectangular column or a cylindrical shape.
- the terminal member 50A axially sandwiches the yoke 31 so that the pillar portion 51 faces the outer peripheral surface 31c of the yoke 31, the first fixing portion 52 faces the first end surface 31a of the yoke 31, and the second fixing portion 53 faces the second end surface 31b of the yoke 31.
- the terminal member 50A has a structure that axially sandwiches the yoke 31, so that the terminal member 50A can be easily attached to the yoke 31 without additional processing such as forming a screw hole in the yoke 31 as in Patent Document 1, for example, improving work efficiency when attaching the terminal member 50A.
- the terminal member 50A is attached so as to sandwich the yoke 31 in the axial direction, which improves the fixing strength of the terminal member 50A after attachment.
- the fixing strength of the terminal member 50A after attachment is improved, which also improves reliability.
- An insulating member may be provided between the yoke 31 and the terminal member 50A. In this case, insulation between the yoke 31 and the terminal member 50A, in particular insulation between the yoke 31 and the terminal portion 54, is more easily ensured.
- the insulating member may be an insulating film that covers at least one of the yoke 31 and the terminal member 50A.
- the yoke 31 is coated with an insulating film, it is preferable that the surface of the yoke 31 facing the terminal member 50A is coated with the insulating film, and it is more preferable that the entire surface of the yoke 31 is coated with the insulating film.
- the entire surface of the yoke 31 does not have to be covered with an insulating film.
- the terminal member 50A When the terminal member 50A is coated with an insulating film, it is preferable that the surfaces of the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 that face the yoke 31 are coated with the insulating film, and it is more preferable that the entire surfaces of the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 are coated with the insulating film.
- the entire surfaces of the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 facing the yoke 31 are covered with an insulating film, the entire surfaces of the pillar portion 51, the first fixing portion 52, and the second fixing portion 53 do not have to be covered with an insulating film.
- a method for coating at least one of the target surfaces of the yoke 31 and the terminal member 50A with an insulating film includes, for example, a method of applying an insulating material to the target surface using a painting method such as electrocoating.
- the insulating member may be an insulating sheet preformed from an insulating material.
- the insulating sheet is provided at least between the yoke 31 and the terminal member 50A.
- an insulating member does not have to be provided between the yoke 31 and the terminal member 50A.
- an insulating member be provided between the yoke 31 and the exposed portion of the terminal portion 54 described above.
- One end 41a of the winding 41 is fixed in a wound state to the terminal portion 54. This allows the one end 41a of the winding 41 to be led out to the terminal member 50A.
- One end 41a of the winding 41 may be wound around the terminal portion 54 and then fixed to the terminal portion 54 by soldering or the like.
- one end 41a of the winding 41 may be wound around the terminal portion 54 and then fixed to the terminal portion 54 and a terminal of a wiring board described below by soldering or the like.
- the stator 20A there is at least one coil 40A in which one end 41a of the winding 41 is fixed in a state where it is wound around the terminal portion 54.
- one end 41a of the winding 41 may be fixed in a state where it is wound around the terminal portion 54 for all of the multiple coils 40A, or one end 41a of the winding 41 may be fixed in a state where it is wound around the terminal portion 54 for some of the coils 40A.
- the terminal members 50A that axially clamp the yoke 31 are used to electrically lead out the coil 40A, for example, to electrically connect the coil 40A to a wiring board (described later).
- the stator 20A can improve the work efficiency during installation of the terminal member 50A for electrically conducting the coil 40A, and the fixing strength after installation.
- stator 20A When manufacturing the stator 20A, there is no need to perform additional processing on the molded stator core 30A (more specifically, the yoke 31) in order to attach the terminal member 50A to the yoke 31. Therefore, no damage is caused to the stator core 30A during manufacturing of the stator 20A, and as a result, a decrease in the strength of the stator 20A (more specifically, the stator core 30A) is suppressed.
- the terminal members 50A are attached so as to sandwich the yoke 31 in the axial direction, so the space factor of the coil 40A (winding 41) is not reduced by the terminal members 50A. This ensures the power density of the motor in which the stator 20A is incorporated.
- stator according to embodiment 1 of the present invention a stator in which multiple coil units are arranged in a ring shape in the circumferential direction will be given, and the manner in which the terminal members are fixed to each coil unit will be described.
- the stator 20A is made up of multiple coil units, including coil unit 70A and coil unit 71A, arranged in a ring shape in the circumferential direction.
- the coil unit 70A is used, for example, when connecting the windings 41 of multiple coils 40A in series.
- the stator 20A may further include a coil unit 71A that does not have a terminal member 50A. In this case, since it is not necessary to provide the terminal member 50A to all coil units, the cost associated with the terminal member 50A can be reduced.
- FIG. 2 is a schematic perspective view showing the coil unit in FIG. 1 as viewed from the inside.
- FIG. 3 is a schematic perspective view showing the coil unit in FIG. 1 as viewed from the outside.
- FIG. 4 is a schematic perspective view showing the split core in FIG. 2 and FIG. 3.
- FIG. 5 is a schematic perspective view showing the terminal member in FIG. 2 and FIG. 3.
- FIG. 6 is a schematic cross-sectional view showing a portion of the cross-section along line A-A' of the terminal member in FIG. 5.
- the coil unit 70A shown in Figures 2 and 3 has a split core 80A, a coil 40A, and a terminal member 50A.
- the split cores 80A are formed by dividing the stator core 30A in the circumferential direction.
- the stator core 30A is formed by arranging multiple split cores 80A in a ring shape in the circumferential direction.
- the split core 80A has a split yoke 81 and teeth 32.
- the split yoke 81 is formed by splitting the yoke 31 in the circumferential direction.
- the split yoke 81 has a first end face 81a and a second end face 81b that face each other in the axial direction.
- the first end face 81a of the split yoke 81 is included in the first end face 31a of the yoke 31.
- the second end face 81b of the split yoke 81 is included in the second end face 31b of the yoke 31.
- the split yoke 81 has an outer peripheral surface 81c and an inner peripheral surface 81d that face each other in the radial direction.
- the outer peripheral surface 81c of the split yoke 81 is included in the outer peripheral surface 31c of the yoke 31.
- the inner peripheral surface 81d of the split yoke 81 is included in the inner peripheral surface 31d of the yoke 31.
- the teeth 32 protrude radially from the inner peripheral surface 81d of the split yoke 81. In this way, the teeth 32 are integrated with the split yoke 81.
- the split core 80A is made of a molded magnetic powder.
- the split yoke 81 and teeth 32 of the split core 80A are integrally made of a molded magnetic powder.
- the outer periphery of the split core 80A along the circumferential direction i.e., the outer periphery of the split yoke 81 along the circumferential direction
- the outer periphery of the split yoke 81 along the circumferential direction may be, for example, composed of only curved lines, only straight lines, or a combination of curved lines and straight lines.
- a configuration in which split yokes 81 whose outer peripheries when viewed from the axial direction are configured as described above are arranged in the circumferential direction is included in the configuration in which the yoke 31 is annular along the circumferential direction.
- the teeth 32 are narrower in at least one of the axial and circumferential directions on the split yoke 81 side than on the opposite side of the split yoke 81.
- the teeth 32 are narrower in the circumferential direction on the split yoke 81 side than on the opposite side of the split yoke 81.
- the teeth 32 on the yoke 31 side are narrower in at least one of the axial and circumferential directions than on the side opposite the yoke 31.
- the number of turns of the coil 40A can be increased by using the thinner part as the winding axis of the coil 40A.
- the magnetic flux penetrating the coil 40A tends to increase, which tends to improve the output torque of the motor.
- the coil 40A is attached to the teeth 32 of the split core 80A.
- the terminal portion 54 may or may not axially penetrate the first fixed portion 52 as shown in FIG. 6.
- the terminal member 50A axially sandwiches the split yoke 81 so that the pillar portion 51 faces the outer peripheral surface 81c of the split yoke 81, the first fixing portion 52 faces the first end surface 81a of the split yoke 81, and the second fixing portion 53 faces the second end surface 81b of the split yoke 81. This fixes the terminal member 50A to the split yoke 81.
- a first groove 82 is provided on the first end surface 81a of the split yoke 81 so as to open radially toward the outer peripheral surface 81c of the split yoke 81.
- the first groove 82 needs only to be open radially at least toward the outer circumferential surface 81c of the split yoke 81.
- the first groove 82 may be provided so as to open across both the outer peripheral surface 81c side and the inner peripheral surface 81d side of the split yoke 81 in the radial direction. More specifically, the first groove 82 may be provided so as to connect the outer peripheral surface 81c and the inner peripheral surface 81d of the split yoke 81 in the radial direction.
- the first groove 82 may not open to the inner peripheral surface 81d of the split yoke 81 in the radial direction, but may be provided partway from the outer peripheral surface 81c of the split yoke 81 toward the inner peripheral surface 81d.
- the three-dimensional shape of the first groove 82 is not limited to the three-dimensional shape shown in FIG. 4.
- the first end surface 81a of the split yoke 81 is fitted with the first fixed portion 52. More specifically, the first groove 82 provided in the first end surface 81a of the split yoke 81 is fitted with the first fixed portion 52. This allows the first fixed portion 52 to be firmly fixed to the split yoke 81, and also makes it easy to position the first fixed portion 52 in the axial and circumferential directions.
- a second groove 83 is provided on the second end surface 81b of the split yoke 81 so as to open radially toward the outer peripheral surface 81c of the split yoke 81.
- the second groove 83 needs only to be provided so as to open at least toward the outer circumferential surface 81c of the split yoke 81 in the radial direction.
- the second groove 83 may be provided so as to open across both the outer peripheral surface 81c side and the inner peripheral surface 81d side of the split yoke 81 in the radial direction. More specifically, the second groove 83 may be provided so as to connect the outer peripheral surface 81c and the inner peripheral surface 81d of the split yoke 81 in the radial direction.
- the second groove 83 may not open to the inner peripheral surface 81d of the split yoke 81 in the radial direction, but may be provided partway from the outer peripheral surface 81c of the split yoke 81 toward the inner peripheral surface 81d.
- the three-dimensional shape of the second groove 83 is not limited to the three-dimensional shape shown in FIG. 4.
- the second end surface 81b of the split yoke 81 and the second fixing portion 53 are fitted together. More specifically, the second groove 83 provided in the second end surface 81b of the split yoke 81 and the second fixing portion 53 are fitted together. This allows the second fixing portion 53 to be firmly fixed to the split yoke 81, and also makes it easier to position the second fixing portion 53 in the axial and circumferential directions.
- the first groove 82 is engaged with the first fixing portion 52, and the second groove 83 is engaged with the second fixing portion 53, so that the terminal member 50A is firmly fixed to the split yoke 81 and the terminal member 50A can be easily positioned in the axial and circumferential directions.
- the first groove 82 provided in the first end surface 81a of the split yoke 81 and the second groove 83 provided in the second end surface 81b of the split yoke 81 are molded at the same time as the split core 80A is molded.
- the coil unit 70A since there is no need to perform additional processing on the molded split core 80A in order to provide the first groove 82 and the second groove 83 in the split yoke 81, no damage is caused to the split core 80A, and as a result, the decrease in strength of the coil unit 70A (more specifically, the split core 80A) is suppressed.
- coil unit 70A even if the first groove 82 and second groove 83 provided in split yoke 81 are shallower than the screw holes described in Patent Document 1, they function when fitting the first end face 81a of split yoke 81 to the first fixed portion 52 and when fitting the second end face 81b of split yoke 81 to the second fixed portion 53. Therefore, in coil unit 70A, even if the first groove 82 and second groove 83 are provided in split yoke 81, the effect on the magnetic characteristics is kept to a minimum.
- the first fixing portion 52 may protrude from the first groove 82 in the axial direction.
- the distance between the split yoke 81 and the terminal portion 54 is more easily ensured, and therefore insulation between the split yoke 81 and the terminal portion 54 is more easily ensured.
- Figure 7 is a schematic perspective view showing the state in which the housing is attached to the stator shown in Figure 1.
- the first fixed portion 52 is provided with a guide groove 55.
- the guide groove 55 is provided on the surface of the first fixed portion 52 on the inner peripheral surface 81d side of the split yoke 81.
- the winding 41 extends toward the terminal portion 54 so that one end 41a passes through the guide groove 55.
- the guide groove 55 is used as a groove for positioning the winding 41 when one end 41a of the winding 41 is led out to the terminal portion 54.
- the boundary between adjacent surfaces of the split yoke 81 may become rough during the manufacturing process of the split core 80A, and burrs may be formed. Therefore, when one end face 41a of the winding 41 is led out to the terminal portion 54, if the one end face 41a side of the winding 41 is in contact with the boundary between the first end face 81a and the inner peripheral face 81d of the split yoke 81, the insulating coating of the winding 41 may be damaged by the burrs described above.
- the one end 41a side of the winding 41 can avoid the boundary between the first end surface 81a and the inner surface 81d of the split yoke 81, thereby preventing damage to the insulating coating of the winding 41.
- coil unit 70A if one end 41a of winding 41 extends toward terminal portion 54 so as to pass through guide groove 55, one end 41a of winding 41 is less likely to come into contact with housing 100 when housing 100 is attached to stator 20A as shown in FIG. 7, so insulation between winding 41 and housing 100 is more easily ensured.
- a third groove 84 extending in the axial direction is provided on the outer peripheral surface 81c of the split yoke 81.
- the third groove 84 is preferably provided so as to open in the axial direction on both sides of the first end face 81a side and the second end face 81b side of the split yoke 81, in this case on both sides of the first groove 82 side and the second groove 83 side. More specifically, the third groove 84 is preferably provided so as to connect the first end face 81a and the second end face 81b of the split yoke 81 in the axial direction, in this case on the first groove 82 and the second groove 83.
- the three-dimensional shape of the third groove 84 is not limited to the three-dimensional shape shown in FIG. 4.
- the outer peripheral surface 81c of the split yoke 81 and the pillar portion 51 are engaged. More specifically, it is preferable that the third groove 84 provided on the outer peripheral surface 81c of the split yoke 81 and the pillar portion 51 are engaged. This allows the pillar portion 51 to be firmly fixed to the split yoke 81 and makes it easy to position the pillar portion 51 in the circumferential and radial directions.
- the first groove 82 is fitted into the first fixing portion 52
- the second groove 83 is fitted into the second fixing portion 53
- the third groove 84 is fitted into the pillar portion 51.
- the third groove 84 is molded at the same time as the molding of the split core 80A, similar to the first groove 82 and the second groove 83.
- the coil unit 70A 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 first groove 82, the second groove 83, and the third groove 84 in the split yoke 81, so no damage is caused to the split core 80A, and as a result, the decrease in strength of the coil unit 70A (more specifically, the split core 80A) is suppressed.
- coil unit 70A even if the third groove 84 provided in split yoke 81 is shallower than the screw hole described in Patent Document 1, it still functions when fitting the outer peripheral surface 81c of split yoke 81 with column portion 51. Therefore, in coil unit 70A, even if the third groove 84 is provided in split yoke 81, the effect on magnetic properties is kept to a minimum.
- the terminal members 50A in this case the pillar portion 51, the first fixing portion 52, and the second fixing portion 53, do not protrude radially beyond the outer peripheral surface 81c of the split yoke 81. In this case, even when the terminal members 50A are provided, an increase in the radial dimension of the coil unit 70A is suppressed.
- the terminal member 50A does not protrude radially beyond the outer peripheral surface 81c of the split yoke 81.
- the outer end of the terminal member 50A may be located at the same position as the outer peripheral surface 81c of the split yoke 81, or may be located on the inner peripheral surface 81d side of the split yoke 81.
- the terminal members 50A here the first fixed portion 52 and the second fixed portion 53, do not protrude radially beyond the inner peripheral surface 81d of the split yoke 81. In this case, even when the terminal members 50A are provided, the terminal members 50A are less likely to interfere with the coil 40A (winding 41), so that the terminal members 50A are prevented from decreasing the space factor of the coil 40A (winding 41).
- the terminal member 50A does not protrude radially beyond the inner peripheral surface 81d of the split yoke 81.
- the inner end of the terminal member 50A may be located at the same position as the inner peripheral surface 81d of the split yoke 81, or may be located on the outer peripheral surface 81c side of the split yoke 81.
- the first fixing portion is housed inside the first groove in the axial direction.
- the stator of embodiment 2 of the present invention may be similar to the stator of embodiment 1 of the present invention except for the above points.
- FIG. 8 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 2 of the present invention.
- FIG. 9 is a schematic perspective view showing a split core in FIG. 8.
- FIG. 10 is a schematic perspective view showing a terminal member in FIG. 8.
- the coil unit 70B shown in FIG. 8 has a split core 80A (see FIG. 9), a coil 40A, and a terminal member 50B (see FIG. 10).
- the first fixing portion 52 is contained within the first groove 82 in the axial direction. In other words, the first fixing portion 52 does not protrude from the first groove 82 in the axial direction. In such a configuration, the outer end of the first fixing portion 52 may be located at the same position as the outer end of the first groove 82 in the axial direction, or may be located on the inner end (bottom) side of the first groove 82.
- the first fixing portion 52 is fitted inside the first groove 82 in the axial direction, which prevents the coil unit 70B from increasing in the axial dimension. This makes it easier to reduce the height of a stator in which multiple coil units 70B are arranged in a ring shape in the circumferential direction, and also makes it easier to reduce the height of a motor incorporating the above-mentioned stator.
- first fixed portion 52 in FIG. 10 is smaller than that in FIG. 5 while the axial dimension of first groove 82 in FIG. 9 remains the same as in FIG. 4 so that first fixed portion 52 fits inside first groove 82 in the axial direction, but is not limited to this.
- the axial dimension of first fixed portion 52 in FIG. 5 may remain the same as in FIG. 5 so that first fixed portion 52 fits inside first groove 82 in the axial direction, but the axial dimension of first groove 82 in FIG. 10 may be larger than that in FIG. 4.
- the second fixing portion 53 may protrude from the second groove 83 in the axial direction, or may be contained within the second groove 83 in the axial direction. The same applies to the other embodiments.
- a first groove is provided on a first end face of the yoke so as to open radially toward the outer circumferential surface side of the yoke, the first groove and the first fixed portion are engaged with each other, and a second groove is provided on a second end face of the yoke so as to open radially toward the outer circumferential surface side of the yoke, the second groove and the second fixed portion are engaged with each other, and the three-dimensional shapes of the first groove and the second groove are different from each other.
- the maximum circumferential dimensions of the first groove and the second groove are different from each other.
- the maximum circumferential dimension of the first groove is greater than the maximum circumferential dimension of the second groove.
- the stator of embodiment 3 of the present invention may be similar to the stators of embodiments 1 and 2 of the present invention, except for the above points.
- FIG. 11 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 3 of the present invention.
- FIG. 12 is a schematic perspective view showing a split core in FIG. 11.
- FIG. 13 is a schematic perspective view showing a terminal member in FIG. 11.
- the coil unit 70C shown in FIG. 11 has a split core 80C (see FIG. 12), a coil 40A, and a terminal member 50C (see FIG. 13).
- the three-dimensional shapes of the first groove 82 and the second groove 83 are different from each other. This makes it easy to distinguish between the first groove 82 and the second groove 83.
- the maximum circumferential dimensions of the first groove 82 and the second groove 83 are different from each other. More specifically, as shown in Figures 11 and 12, the maximum circumferential dimension of the first groove 82 is larger than the maximum circumferential dimension of the second groove 83.
- the maximum circumferential dimension of first groove 82 is greater than the maximum circumferential dimension of second groove 83. This makes it easier for one end 41a of winding 41 to avoid the boundary between first end face 81a and inner circumferential face 81d of split yoke 81 when one end 41a of winding 41 is led to terminal portion 54, making it easier to prevent damage to the insulating coating of winding 41.
- the maximum circumferential dimension of the first groove 82 is greater than the maximum circumferential dimension of the second groove 83, which makes it easier to ensure the distance between the first end face 81a of the split yoke 81 and the terminal portion 54, and therefore makes it easier to ensure insulation between the split yoke 81 (split core 80C) and the terminal portion 54.
- the maximum circumferential dimension of the first groove 82 is greater than the maximum circumferential dimension of the second groove 83. Therefore, when a housing (see FIG. 7) is attached to a stator in which multiple coil units 70C are arranged in a ring shape in the circumferential direction, the area where the portion of the first end face 81a of the split yoke 81 where the first groove 82 is provided is separated from the housing is wide, making it easier to ensure insulation between the split yoke 81 (split core 80C) and the housing.
- the maximum circumferential dimension of the first groove is smaller than the maximum circumferential dimension of the second groove.
- the stator of embodiment 4 of the present invention may be similar to the stators of embodiments 1 to 3 of the present invention, except for the above points.
- FIG. 14 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 4 of the present invention.
- FIG. 15 is a schematic perspective view showing a split core in FIG. 14.
- FIG. 16 is a schematic perspective view showing a terminal member in FIG. 14.
- the coil unit 70D shown in FIG. 14 has a split core 80D (see FIG. 15), a coil 40A, and a terminal member 50D (see FIG. 16).
- the maximum circumferential dimension of the first groove 82 is smaller than the maximum circumferential dimension of the second groove 83.
- a first step portion along the axial direction is provided at the bottom of the first groove so that the axial dimension of the first groove is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the first fixing portion has a first protrusion protruding in the axial direction, and the first step portion and the first protrusion are engaged with each other.
- a third step portion is provided along the axial direction at the bottom of the second groove so that the axial dimension of the second groove is smaller on the outer peripheral surface side of the yoke than on the inner peripheral surface side, and the second fixing portion has a third protrusion portion that protrudes in the axial direction, and the third step portion and the third protrusion portion are engaged with each other.
- the stator of embodiment 5 of the present invention may be similar to the stators of embodiments 1 to 4 of the present invention, except for the above points.
- FIG. 17 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 5 of the present invention.
- FIG. 18 is a schematic perspective view showing a split core in FIG. 17.
- FIG. 19 is a schematic perspective view showing a terminal member in FIG. 17.
- the coil unit 70E shown in FIG. 17 has a split core 80E (see FIG. 18), a coil 40A, and a terminal member 50E (see FIG. 19).
- the bottom of the first groove 82 (here, the bottom on the axial side of the second groove 83) is provided with a first step portion 82a along the axial direction so that the axial dimension of the first groove 82 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.
- the first fixing portion 52 has a first protrusion 52a that protrudes in the axial direction.
- the first protrusion 52a protrudes in a claw-like shape from the radially innermost position of the first fixing portion 52 (here, the side opposite the column portion 51) toward the second fixing portion 53 in the axial direction.
- the first step portion 82a and the first protrusion portion 52a are fitted together. This allows the first fixing portion 52 to be firmly fixed to the split yoke 81, and makes it easy to position the first fixing portion 52 in the axial, circumferential, and radial directions.
- the bottom of the second groove 83 (here, the bottom on the axial side of the first groove 82) is provided with a third step portion 83a along the axial direction so that the axial dimension of the second groove 83 is smaller on the outer peripheral surface 81c side of the split yoke 81 than on the inner peripheral surface 81d side.
- the second fixing portion 53 has a third protrusion 53a that protrudes in the axial direction.
- the third protrusion 53a protrudes in a claw-like shape from the radially innermost position of the second fixing portion 53 (here, the side opposite the column portion 51) toward the first fixing portion 52 in the axial direction.
- the third step portion 83a and the third protrusion portion 53a are fitted together. This allows the second fixing portion 53 to be firmly fixed to the split yoke 81, and makes it easy to position the second fixing portion 53 in the axial, circumferential, and radial directions.
- the first step portion 82a is engaged with the first protrusion portion 52a
- the third step portion 83a is engaged with the third protrusion portion 53a, so that the terminal member 50E is firmly fixed to the split yoke 81 and the terminal member 50E can be easily positioned in the axial, circumferential, and radial directions.
- the terminal member 50E can be simply pushed into the split yoke 81 from the outer peripheral surface 81c side of the split yoke 81 to engage the first step portion 82a with the first protrusion 52a, and also engage the third step portion 83a with the third protrusion 53a, improving work efficiency when installing the terminal member 50E.
- the number of steps of the first step portion 82a and the third step portion 83a may be one or multiple, independently of each other.
- the number of steps of the first step portion 82a and the third step portion 83a may be the same or different.
- the three-dimensional shapes of the first protrusion 52a and the third protrusion 53a are not limited to those shown in Figures 17 and 19.
- the three-dimensional shape of the first protrusion 52a may be such that the surface of the first protrusion 52a has a multiple-step staircase shape along the surface of the first step portion 82a.
- the three-dimensional shape of the third protrusion 53a may be such that the surface of the third protrusion 53a has a multiple-step staircase shape along the surface of the third step portion 83a.
- the three-dimensional shapes of the first protrusion 52a and the third protrusion 53a may be the same as each other or may be different from each other.
- one of the mating portion between the first step portion 82a and the first protrusion portion 52a and the mating portion between the third step portion 83a and the third protrusion portion 53a may not be provided.
- the third step portion 83a may not be provided in the second groove 83 and the second fixing portion 53 may not have the third protrusion portion 53a.
- the first step portion 82a may not be provided in the first groove 82 and the first fixing portion 52 may not have the first protrusion portion 52a.
- a second step portion is provided along the circumferential direction on the side of the first groove so that the circumferential dimension of the first groove is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the first fixing portion has a second protrusion protruding in the circumferential direction, and the second step portion and the second protrusion are engaged with each other.
- a fourth step portion is provided along the circumferential direction on the side of the second groove so that the circumferential dimension of the second groove is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side, and the second fixing portion has a fourth protrusion protruding in the circumferential direction, and the fourth step portion and the fourth protrusion are engaged with each other.
- stator of embodiment 6 of the present invention may be similar to the stators of embodiments 1 to 5 (including the modified examples) of the present invention.
- FIG. 20 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 6 of the present invention.
- FIG. 21 is a schematic perspective view showing a split core in FIG. 20.
- FIG. 22 is a schematic perspective view showing a terminal member in FIG. 20.
- the coil unit 70F shown in FIG. 20 has a split core 80F (see FIG. 21), a coil 40A, and a terminal member 50F (see FIG. 22).
- the side of the first groove 82 is provided with a second step portion 82ba and a second step portion 82bb along the circumferential direction so that the circumferential dimension of the first groove 82 is smaller on the outer circumferential surface 81c side of the split yoke 81 than on the inner circumferential surface 81d side.
- the first fixing portion 52 has second protrusions 52ba and 52bb that protrude in the circumferential direction.
- the second protrusions 52ba and 52bb protrude in opposite directions in the circumferential direction from the innermost radial position (here, the opposite side to the pillar portion 51) of the first fixing portion 52.
- the second step portion 82ba is engaged with the second protrusion portion 52ba
- the second step portion 82bb is engaged with the second protrusion portion 52bb.
- the side of the second groove 83 is provided with a fourth step portion 83ba and a fourth step portion 83bb along the circumferential direction so that the circumferential dimension of the second groove 83 is smaller on the outer circumferential surface 81c side of the split yoke 81 than on the inner circumferential surface 81d side.
- the second fixing portion 53 has a fourth protrusion 53ba and a fourth protrusion 53bb that protrude in the circumferential direction.
- the second fixing portion 53 has a snap-fit structure, and the fourth protrusion 53ba and the fourth protrusion 53bb protrude in opposite directions in the circumferential direction from the radially innermost position of the second fixing portion 53 (here, the opposite side to the pillar portion 51).
- the fourth step portion 83ba is engaged with the fourth protrusion portion 53ba
- the fourth step portion 83bb is engaged with the fourth protrusion portion 53bb.
- the second step portion 82ba is fitted into the second protrusion portion 52ba
- the second step portion 82bb is fitted into the second protrusion portion 52bb
- the fourth step portion 83ba is fitted into the fourth protrusion portion 53ba
- the fourth step portion 83bb is fitted into the fourth protrusion portion 53bb.
- the work efficiency when attaching the terminal member 50F is improved.
- the fourth step portion 83ba can be fitted into the fourth protrusion portion 53ba, and the fourth step portion 83bb can be fitted into the fourth protrusion portion 53bb, simply by pushing the second fixing portion 53 into the split yoke 81 from the outer circumferential surface 81c side of the split yoke 81.
- the terminal member 50F since the terminal member 50F is attached to the split yoke 81 by the above-mentioned fitting manner, the terminal member 50F is firmly fixed to the split yoke 81 even if the axial dimensions of the first groove 82 and the second groove 83 are smaller than in the coil unit 70A (see Figures 2 and 3), for example.
- the terminal member 50F since it is possible to reduce the axial dimensions of the first groove 82 and the second groove 83, even when the terminal member 50F is provided, the terminal member 50F is less likely to interfere with the coil 40A (winding 41), and therefore a decrease in the space factor of the coil 40A (winding 41) due to the terminal member 50F is suppressed.
- the number of steps of the second step portion 82ba, the second step portion 82bb, the fourth step portion 83ba, and the fourth step portion 83bb may be one step or multiple steps, independently of each other.
- the number of steps of the second step portion 82ba, the second step portion 82bb, the fourth step portion 83ba, and the fourth step portion 83bb may be the same as each other, may be different from each other, or may be partially different.
- the three-dimensional shapes of the second protrusion 52ba, the second protrusion 52bb, the fourth protrusion 53ba, and the fourth protrusion 53bb are not limited to the three-dimensional shapes shown in Figures 20 and 22.
- the three-dimensional shape of the second protrusion 52ba may be such that the surface of the second protrusion 52ba has a multiple-step staircase shape along the surface of the second step portion 82ba.
- the three-dimensional shape of the second protrusion 52bb may be such that the surface of the second protrusion 52bb has a multiple-step staircase shape along the surface of the second step portion 82bb.
- the three-dimensional shape of the fourth protrusion 53ba may be such that the surface of the fourth protrusion 53ba has a multiple-step staircase shape along the surface of the fourth step portion 83ba.
- the three-dimensional shape of the fourth protrusion 53bb may be such that the surface of the fourth protrusion 53bb has a multiple-step staircase shape along the surface of the fourth step portion 83bb.
- the three-dimensional shapes of the second protrusion 52ba, the second protrusion 52bb, the fourth protrusion 53ba, and the fourth protrusion 53bb may be the same as each other, may be different from each other, or may be partially different.
- the mating portion of the second step portion 82ba and the second protrusion portion 52ba, the mating portion of the second step portion 82bb and the second protrusion portion 52bb, the mating portion of the fourth step portion 83ba and the fourth protrusion portion 53ba, and the mating portion of the fourth step portion 83bb and the fourth protrusion portion 53bb may not be provided.
- the fourth step portion 83ba and the fourth step portion 83bb may not be provided in the second groove 83 and the second fixing portion 53 may not have the fourth protrusion portion 53ba and the fourth protrusion portion 53bb.
- the first groove is tapered such that the circumferential dimension decreases from the inner surface side to the outer surface side of the yoke
- the first fixed portion has a tapered first taper portion whose circumferential dimension decreases from the inner surface side to the outer surface side of the yoke, and the first groove and the first taper portion are engaged with each other.
- the second groove is tapered such that the circumferential dimension decreases from the inner circumferential surface side to the outer circumferential surface side of the yoke
- the second fixing portion has a tapered second tapered portion whose circumferential dimension decreases from the inner circumferential surface side to the outer circumferential surface side of the yoke, and the second groove and the second tapered portion are fitted together.
- stator of embodiment 7 of the present invention may be similar to the stators of embodiments 1 to 5 (including the modified examples) of the present invention.
- FIG. 23 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 7 of the present invention.
- FIG. 24 is a schematic perspective view showing a split core in FIG. 23.
- FIG. 25 is a schematic perspective view showing a terminal member in FIG. 23.
- the coil unit 70G shown in FIG. 23 has a split core 80G (see FIG. 24), a coil 40A, and a terminal member 50G (see FIG. 25).
- the first groove 82 has a tapered shape in which the circumferential dimension decreases from the inner circumferential surface 81d of the split yoke 81 toward the outer circumferential surface 81c.
- the first fixed portion 52 has a tapered first taper portion 52c whose circumferential dimension decreases from the inner circumferential surface 81d side to the outer circumferential surface 81c side of the split yoke 81.
- the first fixed portion 52 has the first taper portion 52c at a position on the axial side of the second fixed portion 53.
- the first groove 82 and the first tapered portion 52c are fitted together. This allows the first fixed portion 52 to be firmly fixed to the split yoke 81, and makes it easy to position the first fixed portion 52 in the axial, circumferential, and radial directions.
- the second groove 83 has a tapered shape in which the circumferential dimension decreases from the inner circumferential surface 81d side of the split yoke 81 toward the outer circumferential surface 81c side.
- the second fixing portion 53 has a tapered second taper portion 53c whose circumferential dimension decreases from the inner circumferential surface 81d side to the outer circumferential surface 81c side of the split yoke 81.
- the second fixing portion 53 is composed of the second taper portion 53c.
- the second groove 83 and the second tapered portion 53c are fitted together. This allows the second fixed portion 53 to be firmly fixed to the split yoke 81, and makes it easy to position the second fixed portion 53 in the axial, circumferential, and radial directions.
- the first groove 82 is fitted into the first tapered portion 52c, and the second groove 83 is fitted into the second tapered portion 53c, so that the terminal member 50G is firmly fixed to the split yoke 81 and the terminal member 50G can be easily positioned in the axial, circumferential, and radial directions.
- a slit may be provided in the second tapered portion 53c. If a slit is provided in the second tapered portion 53c, the second tapered portion 53c (second fixing portion 53) becomes more flexible, so that the second groove 83 and the second tapered portion 53c can be easily fitted together.
- the slit may be provided, for example, in the circumferential direction or in the radial direction.
- the terminal member 50G since the terminal member 50G is attached to the split yoke 81 by the above-mentioned fitting manner, the terminal member 50G is firmly fixed to the split yoke 81 even if the axial dimensions of the first groove 82 and the second groove 83 are smaller than in the coil unit 70A (see Figures 2 and 3), for example.
- the terminal member 50G since it is possible to reduce the axial dimensions of the first groove 82 and the second groove 83, even when the terminal member 50G is provided, the terminal member 50G is less likely to interfere with the coil 40A (winding 41), and therefore a decrease in the space factor of the coil 40A (winding 41) due to the terminal member 50G is suppressed.
- the split core 80G of the coil unit 70G it is easier to form the first groove 82 and the second groove 83 compared to the split core 80F of the coil unit 70F (see FIG. 21).
- the axial dimensions of the first groove 82 and the first tapered portion 52c may be the same or different. When the axial dimensions of the first groove 82 and the first tapered portion 52c are different, the axial dimension of the first groove 82 may be larger than the axial dimension of the first tapered portion 52c or may be smaller than the axial dimension of the first tapered portion 52c.
- the axial dimensions of the second groove 83 and the second tapered portion 53c may be the same or different.
- the axial dimension of the second groove 83 may be larger than the axial dimension of the second tapered portion 53c or may be smaller than the axial dimension of the second tapered portion 53c.
- the three-dimensional shapes of the first groove 82 and the second groove 83 are not limited to the three-dimensional shapes shown in Figures 23 and 24, so long as they are tapered as described above.
- the three-dimensional shapes of the first groove 82 and the second groove 83 may be the same as each other or may be different from each other.
- the three-dimensional shapes of the first tapered portion 52c and the second tapered portion 53c are not limited to the three-dimensional shapes shown in Figures 23 and 25, so long as they are tapered as described above.
- the three-dimensional shapes of the first tapered portion 52c and the second tapered portion 53c may be the same as each other or may be different from each other.
- one of the mating portion between the first groove 82 and the first tapered portion 52c and the mating portion between the second groove 83 and the second tapered portion 53c may not be provided.
- the second groove 83 may not be tapered and the second fixed portion 53 may not have the second tapered portion 53c.
- the first groove 82 may not be tapered and the first fixed portion 52 may not have the first tapered portion 52c.
- a first recess recessed in the axial direction is provided on one of the bottom of the first groove and the first fixed portion, and a first convex portion protruding in the axial direction is provided on the other of the bottom of the first groove and the first fixed portion, and the first recess and the first convex portion are engaged with each other.
- a second recess recessed in the axial direction is provided on one of the bottom of the second groove and the second fixed portion, and a second protrusion protruding in the axial direction is provided on the other of the bottom of the second groove and the second fixed portion, and the second recess and the second protrusion are fitted together.
- stator of embodiment 8 of the present invention may be similar to the stators of embodiments 1 to 7 (including the modified examples) of the present invention.
- FIG. 26 is a schematic perspective view showing an example of a coil unit constituting a stator according to embodiment 8 of the present invention.
- FIG. 27 is a schematic perspective view showing a split core in FIG. 26.
- FIG. 28 is a schematic perspective view showing a terminal member in FIG. 26.
- the coil unit 70H shown in FIG. 26 has a split core 80H (see FIG. 27), a coil 40A, and a terminal member 50H (see FIG. 28).
- a first recess 91a recessed in the axial direction is provided at the bottom of the first groove 82 (here, the bottom on the axial side of the second groove 83).
- the first recess 91a is recessed in the axial direction from a position spaced apart from the periphery at the bottom of the first groove 82 toward the second groove 83.
- the first fixing portion 52 is provided with a first protrusion 92a that protrudes in the axial direction.
- the first protrusion 92a protrudes in the axial direction from a position spaced apart from the periphery on the bottom surface of the first fixing portion 52 (here, the surface on the second fixing portion 53 side) toward the second fixing portion 53.
- the first recess 91a and the first protrusion 92a are fitted together. This allows the first fixing portion 52 to be firmly fixed to the split yoke 81, and makes it easy to position the first fixing portion 52 in the axial, circumferential, and radial directions.
- a second recess 91b recessed in the axial direction is provided at the bottom of the second groove 83 (here, the bottom on the axial side of the first groove 82).
- the second recess 91b is recessed in the axial direction from a position spaced apart from the periphery at the bottom of the second groove 83 toward the first groove 82.
- the second fixing portion 53 is provided with a second protrusion 92b that protrudes in the axial direction.
- the second protrusion 92b protrudes in the axial direction from a position spaced apart from the periphery on the top surface of the second fixing portion 53 (here, the surface on the first fixing portion 52 side) toward the first fixing portion 52.
- the second recess 91b and the second protrusion 92b are fitted together. This allows the second fixing portion 53 to be firmly fixed to the split yoke 81, and makes it easy to position the second fixing portion 53 in the axial, circumferential, and radial directions.
- the first recess 91a is fitted into the first protrusion 92a
- the second recess 91b is fitted into the second protrusion 92b, so that the terminal member 50H is firmly fixed to the split yoke 81 and the terminal member 50H can be easily positioned in the axial, circumferential, and radial directions.
- the terminal member 50H can be simply pushed into the split yoke 81 from the outer circumferential surface 81c side of the split yoke 81 to engage the first recess 91a with the first protrusion 92a and also the second recess 91b with the second protrusion 92b, improving work efficiency when installing the terminal member 50H.
- the terminal member 50H since the terminal member 50H is attached to the split yoke 81 by the above-mentioned fitting manner, even if the axial dimensions of the first groove 82 and the second groove 83 are smaller than in the coil unit 70A (see Figures 2 and 3), the terminal member 50H is firmly fixed to the split yoke 81. In this way, in the coil unit 70H, since it is possible to reduce the axial dimensions of the first groove 82 and the second groove 83, even when the terminal member 50H is provided, the terminal member 50H is less likely to interfere with the coil 40A (winding 41), and therefore a decrease in the space factor of the coil 40A (winding 41) due to the terminal member 50H is suppressed.
- the three-dimensional shapes of the first recess 91a and the second recess 91b are not limited to those shown in Figures 26 and 27.
- the three-dimensional shapes of the first recess 91a and the second recess 91b may be the same as each other or may be different from each other.
- the three-dimensional shapes of the first convex portion 92a and the second convex portion 92b are not limited to those shown in Figures 26 and 28.
- the three-dimensional shapes of the first convex portion 92a and the second convex portion 92b may be the same as each other or may be different from each other.
- the mating portion between the first recess 91a and the first protrusion 92a may be one or multiple for the combination of the first groove 82 and the first fixing portion 52.
- the first recess 91a and the first protrusion 92a may be one each, or the same number of each may be multiple.
- the positional relationship of the multiple mating portions is not particularly limited, and may be provided, for example, spaced apart in the circumferential direction or spaced apart in the radial direction.
- the second recess 91b and the second protrusion 92b may be provided with one or more mating portions for the combination of the second groove 83 and the second fixing portion 53.
- the second recess 91b and the second protrusion 92b may be provided with one each, or the same number of each may be provided with multiples.
- the positional relationship of the multiple mating portions is not particularly limited, and may be provided, for example, spaced apart in the circumferential direction or spaced apart in the radial direction.
- the first recess 91a may be provided on the first fixing portion 52 instead of the bottom of the first groove 82, and the first protrusion 92a may be provided on the bottom of the first groove 82 instead of the first fixing portion 52.
- the second recess 91b may be provided on the second fixing portion 53 instead of the bottom of the second groove 83, and the second protrusion 92b may be provided on the bottom of the second groove 83 instead of the second fixing portion 53.
- one of the mating portion between the first recess 91a and the first protrusion 92a and the mating portion between the second recess 91b and the second protrusion 92b may not be provided.
- the first recess 91a is provided at the bottom of the first groove 82 and the first fixing portion 52 has the first protrusion 92a
- the second recess 91b may not be provided at the bottom of the second groove 83 and the second fixing portion 53 has the second protrusion 92b.
- the first recess 91a may not be provided at the bottom of the first groove 82 and the first fixing portion 52 has the first protrusion 92a.
- the terminal member has two terminal portions.
- one end of the winding is fixed in a state where it is wound around one of the two terminal parts, and the other end of the winding is fixed in a state where it is wound around the other of the two terminal parts.
- stator of embodiment 9 of the present invention may be similar to the stators of embodiments 1 to 8 (including the modified examples) of the present invention.
- FIG. 29 is a schematic perspective view showing an example of a stator according to embodiment 9 of the present invention.
- the stator 20J shown in FIG. 29 has a stator core 30J, multiple coils 40A, and multiple terminal members 50J.
- the stator 20J consists of multiple coil units 70J arranged in a ring shape in the circumferential direction.
- the windings 41 of the multiple coils 40A are connected, for example, in parallel.
- the multiple coils 40A include, for example, in the case of a three-phase, 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, the V-phase winding, and the W-phase winding are connected in a star connection or delta connection.
- Each of the multiple terminal members 50J has a pillar portion 51, a first fixing portion 52, a second fixing portion 53, a terminal portion 54a, and a terminal portion 54b.
- Terminal portion 54a and terminal portion 54b are provided on the first fixed portion 52 so as to protrude from the first fixed portion 52 at positions spaced apart from each other in the circumferential direction.
- terminal portion 54a and terminal portion 54b may be the same as or different from each other.
- terminal portion 54a and terminal portion 54b may be the same as each other or may be different from each other.
- One end 41a of the winding 41 is fixed in a wound state to the terminal portion 54a. This allows the one end 41a of the winding 41 to be led out to the terminal member 50J.
- the other end 41b of the winding 41 is fixed in a wound state to the terminal portion 54b. This allows the other end 41b of the winding 41 to be led out to the terminal member 50J.
- stator 20J among the multiple coils 40A, there is at least one coil 40A in which one end 41a of the winding 41 is fixed in a state where it is wound around the terminal portion 54a, and the other end 41b of the winding 41 is fixed in a state where it is wound around the terminal portion 54b.
- one end 41a of the winding 41 may be fixed in a state where it is wound around the terminal portion 54a, and the other end 41b of the winding 41 may be fixed in a state where it is wound around the terminal portion 54b, or for some of the coils 40A, one end 41a of the winding 41 may be fixed in a state where it is wound around the terminal portion 54a, and the other end 41b of the winding 41 may be fixed in a state where it is wound around the terminal portion 54b.
- the multiple coils 40A if one end 41a of the winding 41 of some of the coils 40A is fixed in a state where it is wound around the terminal portion 54a, and the other end 41b of the winding 41 is fixed in a state where it is wound around the terminal portion 54b, then for the remaining coils 40A, at least one of the one end 41a and the other end 41b of the winding 41 does not have to be fixed in a state where it is wound around the terminal portion.
- the stator core has a split structure divided into split cores, but in the stator of the present invention, the stator core may have an integrated structure that is not split.
- the coils can be arranged more densely than in a stator with a one-piece stator core structure, and as a result, the number of coils can be increased. Therefore, in a stator with a split stator core structure, it is easier to improve the motor characteristics compared to a stator with a one-piece stator core structure.
- the first end face of the yoke is fitted to the first fixed part
- the second end face of the yoke is fitted to the second fixed part.
- the fitting manner between the first end face of the yoke and the first fixed part and the fitting manner between the second end face of the yoke and the second fixed part may be the same or different.
- stator of the present invention when the fitting manner between the first end face of the yoke and the first fixed part and the fitting manner between the second end face of the yoke and the second fixed part are different from each other, for example, a combination of a first tapered groove provided on the first end face of the yoke and a first tapered part of the first fixed part (see embodiment 7) and a third step part at the bottom of the second groove provided on the second end face of the yoke and a third protrusion of the second fixed part (see embodiment 5) may be combined.
- a first groove provided on a first end face of the yoke is engaged with a first fixing portion of the terminal member, and a second groove provided on a second end face of the yoke is engaged with a second fixing portion of the terminal member.
- the yoke does not have to be provided with at least one of the first groove and the second groove.
- the terminal member may simply sandwich the yoke in the axial direction.
- the stator of the present invention can be used not only as a component of a motor, which will be described later, but also as a component of a generator, for example.
- a motor according to the present invention is characterized by comprising the stator according to the present invention and a rotor provided opposite to an inner peripheral surface of the stator.
- FIG. 30 is a schematic perspective view showing an example of a motor according to the present invention.
- the motor 1A shown in FIG. 30 has a rotor 10A and a stator 20A.
- rotor 10A is positioned on the inside of axis AX, and stator 20A is positioned on the outside of axis AX.
- Axis AX corresponds to the rotation axis of rotor 10A.
- the rotor 10A faces the inner circumferential surface of the stator 20A.
- the rotor 10A has, for example, a rotor yoke 11, a shaft 12, and a permanent magnet 13.
- the rotor yoke 11 is made of, for example, a bulk soft magnetic material, an electromagnetic steel sheet, a powder magnetic core, a resin molded body containing a soft magnetic material, etc.
- the shaft 12 is inserted into the rotor yoke 11.
- Examples of materials that can be used to construct the shaft 12 include metals such as stainless steel.
- the direction in which the shaft 12 extends i.e., the direction in which the axis line AX extends, is parallel to the axial direction.
- the permanent magnets 13 are arranged so that the north and south poles are arranged alternately along the outer circumferential surface of the rotor yoke 11.
- the rotor 10A When viewed from the axial direction, the rotor 10A may be approximately circular or approximately polygonal.
- a motor having a stator 20A in which multiple coil units 70A are arranged in a ring shape in the circumferential direction is shown, but the same applies to motors having stators in which other coil units such as coil unit 70B are arranged in a ring shape in the circumferential direction.
- the motor of the present invention may further include a wiring board electrically connected to one end of the winding.
- the wiring board may have a plurality of through holes that penetrate between one main surface and the other main surface and are spaced apart from each other in the circumferential direction.
- terminals may be exposed on the inner wall surface of each through hole.
- the wiring board may be placed axially relative to the stator so that the terminal portions of the multiple terminal members (see FIG. 1) of the stator pass through separate through holes.
- the motor of the present invention may further include a housing (see FIG. 7) for protecting the stator core of the stator.
- the wiring board may be provided inside the housing or outside the housing.
- a stator core including a circumferentially annular yoke and teeth protruding from an inner peripheral surface of the yoke in a radial direction of the yoke, the stator core being made of a compact of magnetic powder; A coil formed by windings wound around the teeth; and a terminal member having a pillar portion extending in an axial direction of the stator core, a first fixed portion provided at one end of the pillar portion in the axial direction so as to protrude closer to the inner circumferential surface of the yoke than the pillar portion in the radial direction, a second fixed portion provided at the other end of the pillar portion in the axial direction so as to protrude closer to the inner circumferential surface of the yoke than the pillar portion in the radial direction, and a terminal portion provided on the first fixed portion so as to protrude from the first fixed portion,
- the yoke has a first end surface and a second end surface opposed to each other in the axial direction
- a first groove is provided in the first end surface of the yoke so as to open toward the outer circumferential surface of the yoke in the radial direction;
- a first step portion is provided at a bottom of the first groove along the axial direction such that a dimension of the first groove is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side of the yoke,
- the first fixing portion has a first protruding portion protruding in the axial direction,
- the stator according to any one of ⁇ 3> to ⁇ 5>, wherein the first step portion and the first protrusion portion are fitted together.
- a second step portion is provided along the circumferential direction at a side portion of the first groove such that a dimension of the first groove in the circumferential direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side,
- the first fixing portion has a second protruding portion protruding in the circumferential direction,
- the stator according to any one of ⁇ 3> to ⁇ 6>, wherein the second step portion and the second protrusion portion are fitted together.
- the first groove has a tapered shape in which a dimension in the circumferential direction becomes smaller from the inner circumferential surface side toward the outer circumferential surface side of the yoke
- the first fixed portion has a first tapered portion having a circumferential dimension that decreases from the inner peripheral surface side to the outer peripheral surface side of the yoke
- the stator according to any one of ⁇ 3> to ⁇ 6>, wherein the first groove and the first tapered portion are fitted together.
- a first recess recessed in the axial direction is provided in one of a bottom of the first groove and the first fixing portion, a first protrusion protruding in the axial direction is provided on the other of the bottom of the first groove and the first fixing portion,
- the stator according to any one of ⁇ 3> to ⁇ 8>, wherein the first recess and the first protrusion are fitted together.
- a second groove is provided in the second end surface of the yoke so as to open toward the outer circumferential surface of the yoke in the radial direction;
- a third step portion is provided at a bottom of the second groove along the axial direction such that a dimension of the second groove is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side of the yoke,
- the second fixing portion has a third protruding portion protruding in the axial direction,
- a fourth step portion is provided along the circumferential direction at a side portion of the second groove such that a dimension of the second groove in the circumferential direction is smaller on the outer circumferential surface side of the yoke than on the inner circumferential surface side,
- the second fixing portion has a fourth protruding portion protruding in the circumferential direction,
- the second groove has a tapered shape in which a dimension in the circumferential direction becomes smaller from the inner circumferential surface side toward the outer circumferential surface side of the yoke
- the second fixed portion has a second tapered portion having a circumferential dimension that decreases from the inner peripheral surface side to the outer peripheral surface side of the yoke
- a second recess recessed in the axial direction is provided in one of a bottom of the second groove and the second fixing portion, a second protrusion protruding in the axial direction is provided on the other of the bottom of the second groove and the second fixing portion,
- the stator according to any one of ⁇ 11> to ⁇ 14>, wherein the second recess and the second protrusion are fitted together.
- a first groove is provided in the first end surface of the yoke so as to open toward the outer circumferential surface of the yoke in the radial direction;
- the first groove and the first fixing portion are fitted together,
- a second groove is provided in the second end surface of the yoke so as to open toward the outer circumferential surface of the yoke in the radial direction;
- the second groove and the second fixing portion are fitted together,
- the first fixing portion is provided with a guide groove,
- the stator according to any one of ⁇ 1> to ⁇ 18>, wherein one end of the winding extends toward the terminal portion so as to pass through the guide groove.
- a third groove extending in the axial direction is provided on the outer circumferential surface of the yoke, The stator according to any one of ⁇ 1> to ⁇ 19>, wherein the third groove and the column portion are fitted together.
- a plurality of coil units are arranged in an annular shape in the circumferential direction,
- the stator according to any one of ⁇ 1> to ⁇ 20>, wherein each of the plurality of coil units independently has a split core formed by splitting the stator core in the circumferential direction, the coil, and the terminal member.
- stator according to any one of ⁇ 1> to ⁇ 21>, wherein the stator core is made of a powder magnetic core.
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Abstract
Description
本発明のステータは、周方向に沿う環状のヨークと、上記ヨークの内周面から上記ヨークの径方向に突出するティースと、を有し、かつ、磁性粉の成形体で構成されたステータコアと、上記ティースに巻回された巻線で構成されたコイルと、上記ステータコアの軸方向に延びる柱部と、上記径方向において上記柱部よりも上記ヨークの上記内周面側に突出するように上記軸方向における上記柱部の一方端部に設けられた第1固定部と、上記径方向において上記柱部よりも上記ヨークの上記内周面側に突出するように上記軸方向における上記柱部の他方端部に設けられた第2固定部と、上記第1固定部から突出するように上記第1固定部に設けられた端子部と、を有する端子部材と、を備え、上記ヨークは、上記軸方向に相対する第1端面及び第2端面を有し、上記端子部材は、上記柱部が上記径方向における上記ヨークの外周面に対向し、上記第1固定部が上記ヨークの上記第1端面に対向し、かつ、上記第2固定部が上記ヨークの上記第2端面に対向するように、上記ヨークを上記軸方向に挟み込み、上記巻線の一方端部は、上記端子部に絡げられた状態で固定されている、ことを特徴とする。
本発明の実施形態1のステータにおいて、ヨークの第1端面と第1固定部とは、嵌合されている。より具体的には、本発明の実施形態1のステータにおいて、ヨークの第1端面には、径方向においてヨークの外周面側に開口するように第1溝が設けられ、第1溝と第1固定部とは、嵌合されている。
本発明の実施形態2のステータにおいて、第1固定部は、軸方向において第1溝の内部に収まっている。
本発明の実施形態3のステータにおいて、ヨークの第1端面には、径方向においてヨークの外周面側に開口するように第1溝が設けられ、第1溝と第1固定部とは、嵌合され、ヨークの第2端面には、径方向においてヨークの外周面側に開口するように第2溝が設けられ、第2溝と第2固定部とは、嵌合され、第1溝及び第2溝の立体形状は、互いに異なる。
本発明の実施形態4のステータにおいて、第1溝の周方向の最大寸法は、第2溝の周方向の最大寸法よりも小さい。
本発明の実施形態5のステータにおいて、第1溝の底部には、第1溝の軸方向の寸法がヨークの外周面側で内周面側よりも小さくなるように、軸方向に沿った第1段差部が設けられ、第1固定部は、軸方向に突出した第1突出部を有し、第1段差部と第1突出部とは、嵌合されている。
本発明の実施形態6のステータにおいて、第1溝の側部には、第1溝の周方向の寸法がヨークの外周面側で内周面側よりも小さくなるように、周方向に沿った第2段差部が設けられ、第1固定部は、周方向に突出した第2突出部を有し、第2段差部と第2突出部とは、嵌合されている。
本発明の実施形態7のステータにおいて、第1溝は、周方向の寸法がヨークの内周面側から外周面側に向かうにつれて小さくなるテーパー状であり、第1固定部は、周方向の寸法がヨークの内周面側から外周面側に向かうにつれて小さくなるテーパー状の第1テーパー部を有し、第1溝と第1テーパー部とは、嵌合されている。
本発明の実施形態8のステータにおいて、第1溝の底部と第1固定部との一方には、軸方向に窪んだ第1凹部が設けられ、第1溝の底部と第1固定部との他方には、軸方向に突出した第1凸部が設けられ、第1凹部と第1凸部とは、嵌合されている。
本発明の実施形態9のステータにおいて、端子部材は端子部を2つ有している。
本発明のモータは、本発明のステータと、上記ステータの内周面に対向して設けられたロータと、を備える、ことを特徴とする。
周方向に沿う環状のヨークと、上記ヨークの内周面から上記ヨークの径方向に突出するティースと、を有し、かつ、磁性粉の成形体で構成されたステータコアと、
上記ティースに巻回された巻線で構成されたコイルと、
上記ステータコアの軸方向に延びる柱部と、上記径方向において上記柱部よりも上記ヨークの上記内周面側に突出するように上記軸方向における上記柱部の一方端部に設けられた第1固定部と、上記径方向において上記柱部よりも上記ヨークの上記内周面側に突出するように上記軸方向における上記柱部の他方端部に設けられた第2固定部と、上記第1固定部から突出するように上記第1固定部に設けられた端子部と、を有する端子部材と、を備え、
上記ヨークは、上記軸方向に相対する第1端面及び第2端面を有し、
上記端子部材は、上記柱部が上記径方向における上記ヨークの外周面に対向し、上記第1固定部が上記ヨークの上記第1端面に対向し、かつ、上記第2固定部が上記ヨークの上記第2端面に対向するように、上記ヨークを上記軸方向に挟み込み、
上記巻線の一方端部は、上記端子部に絡げられた状態で固定されている、ことを特徴とするステータ。
上記ヨークの上記第1端面と上記第1固定部とは、嵌合されている、<1>に記載のステータ。
上記ヨークの上記第1端面には、上記径方向において上記ヨークの上記外周面側に開口するように第1溝が設けられ、
上記第1溝と上記第1固定部とは、嵌合されている、<2>に記載のステータ。
上記第1固定部は、上記第1溝から上記軸方向に突出している、<3>に記載のステータ。
上記第1固定部は、上記軸方向において上記第1溝の内部に収まっている、<3>に記載のステータ。
上記第1溝の底部には、上記第1溝の上記軸方向の寸法が上記ヨークの上記外周面側で上記内周面側よりも小さくなるように、上記軸方向に沿った第1段差部が設けられ、
上記第1固定部は、上記軸方向に突出した第1突出部を有し、
上記第1段差部と上記第1突出部とは、嵌合されている、<3>~<5>のいずれかに記載のステータ。
上記第1溝の側部には、上記第1溝の上記周方向の寸法が上記ヨークの上記外周面側で上記内周面側よりも小さくなるように、上記周方向に沿った第2段差部が設けられ、
上記第1固定部は、上記周方向に突出した第2突出部を有し、
上記第2段差部と上記第2突出部とは、嵌合されている、<3>~<6>のいずれかに記載のステータ。
上記第1溝は、上記周方向の寸法が上記ヨークの上記内周面側から上記外周面側に向かうにつれて小さくなるテーパー状であり、
上記第1固定部は、上記周方向の寸法が上記ヨークの上記内周面側から上記外周面側に向かうにつれて小さくなるテーパー状の第1テーパー部を有し、
上記第1溝と上記第1テーパー部とは、嵌合されている、<3>~<6>のいずれかに記載のステータ。
上記第1溝の底部と上記第1固定部との一方には、上記軸方向に窪んだ第1凹部が設けられ、
上記第1溝の上記底部と上記第1固定部との他方には、上記軸方向に突出した第1凸部が設けられ、
上記第1凹部と上記第1凸部とは、嵌合されている、<3>~<8>のいずれかに記載のステータ。
上記ヨークの上記第2端面と上記第2固定部とは、嵌合されている、<1>~<9>のいずれかに記載のステータ。
上記ヨークの上記第2端面には、上記径方向において上記ヨークの上記外周面側に開口するように第2溝が設けられ、
上記第2溝と上記第2固定部とは、嵌合されている、<10>に記載のステータ。
上記第2溝の底部には、上記第2溝の上記軸方向の寸法が上記ヨークの上記外周面側で上記内周面側よりも小さくなるように、上記軸方向に沿った第3段差部が設けられ、
上記第2固定部は、上記軸方向に突出した第3突出部を有し、
上記第3段差部と上記第3突出部とは、嵌合されている、<11>に記載のステータ。
上記第2溝の側部には、上記第2溝の上記周方向の寸法が上記ヨークの上記外周面側で上記内周面側よりも小さくなるように、上記周方向に沿った第4段差部が設けられ、
上記第2固定部は、上記周方向に突出した第4突出部を有し、
上記第4段差部と上記第4突出部とは、嵌合されている、<11>又は<12>に記載のステータ。
上記第2溝は、上記周方向の寸法が上記ヨークの上記内周面側から上記外周面側に向かうにつれて小さくなるテーパー状であり、
上記第2固定部は、上記周方向の寸法が上記ヨークの上記内周面側から上記外周面側に向かうにつれて小さくなるテーパー状の第2テーパー部を有し、
上記第2溝と上記第2テーパー部とは、嵌合されている、<11>又は<12>に記載のステータ。
上記第2溝の底部と上記第2固定部との一方には、上記軸方向に窪んだ第2凹部が設けられ、
上記第2溝の上記底部と上記第2固定部との他方には、上記軸方向に突出した第2凸部が設けられ、
上記第2凹部と上記第2凸部とは、嵌合されている、<11>~<14>のいずれかに記載のステータ。
上記ヨークの上記第1端面には、上記径方向において上記ヨークの上記外周面側に開口するように第1溝が設けられ、
上記第1溝と上記第1固定部とは、嵌合され、
上記ヨークの上記第2端面には、上記径方向において上記ヨークの上記外周面側に開口するように第2溝が設けられ、
上記第2溝と上記第2固定部とは、嵌合され、
上記第1溝及び上記第2溝の立体形状は、互いに異なる、<1>に記載のステータ。
上記第1溝及び上記第2溝の上記周方向の最大寸法は、互いに異なる、<16>に記載のステータ。
上記第1溝の上記周方向の最大寸法は、上記第2溝の上記周方向の最大寸法よりも大きい、<17>に記載のステータ。
上記第1固定部には、ガイド溝が設けられ、
上記巻線は、一方端部側で上記ガイド溝を通るように上記端子部に向かって延びている、<1>~<18>のいずれかに記載のステータ。
上記ヨークの上記外周面には、上記軸方向に延びる第3溝が設けられ、
上記第3溝と上記柱部とは、嵌合されている、<1>~<19>のいずれかに記載のステータ。
複数のコイルユニットが上記周方向に環状に並んでなり、
上記複数のコイルユニットは、各々独立して、上記ステータコアが上記周方向に分割されてなる分割コアと、上記コイルと、上記端子部材と、を有している、<1>~<20>のいずれかに記載のステータ。
上記ステータコアは、圧粉磁心で構成されている、<1>~<21>のいずれかに記載のステータ。
<1>~<22>のいずれかに記載のステータと、
上記ステータの内周面に対向して設けられたロータと、を備える、ことを特徴とするモータ。
10A ロータ
11 ロータヨーク
12 シャフト
13 永久磁石
20A、20J ステータ
30A、30J ステータコア
31 ヨーク
31a ヨークの第1端面
31b ヨークの第2端面
31c ヨークの外周面
31d ヨークの内周面
32 ティース
40A コイル
41 巻線
41a 巻線の一方端部
41b 巻線の他方端部
50A、50B、50C、50D、50E、50F、50G、50H、50J 端子部材
51 柱部
52 第1固定部
52a 第1突出部
52ba、52bb 第2突出部
52c 第1テーパー部
53 第2固定部
53a 第3突出部
53ba、53bb 第4突出部
53c 第2テーパー部
54、54a、54b 端子部
55 ガイド溝
70A、70B、70C、70D、70E、70F、70G、70H、70J、71A コイルユニット
80A、80C、80D、80E、80F、80G、80H 分割コア
81 分割ヨーク
81a 分割ヨークの第1端面
81b 分割ヨークの第2端面
81c 分割ヨークの外周面
81d 分割ヨークの内周面
82 第1溝
82a 第1段差部
82ba、82bb 第2段差部
83 第2溝
83a 第3段差部
83ba、83bb 第4段差部
84 第3溝
91a 第1凹部
91b 第2凹部
92a 第1凸部
92b 第2凸部
100 筐体
AX 軸線
Claims (23)
- 周方向に沿う環状のヨークと、前記ヨークの内周面から前記ヨークの径方向に突出するティースと、を有し、かつ、磁性粉の成形体で構成されたステータコアと、
前記ティースに巻回された巻線で構成されたコイルと、
前記ステータコアの軸方向に延びる柱部と、前記径方向において前記柱部よりも前記ヨークの前記内周面側に突出するように前記軸方向における前記柱部の一方端部に設けられた第1固定部と、前記径方向において前記柱部よりも前記ヨークの前記内周面側に突出するように前記軸方向における前記柱部の他方端部に設けられた第2固定部と、前記第1固定部から突出するように前記第1固定部に設けられた端子部と、を有する端子部材と、を備え、
前記ヨークは、前記軸方向に相対する第1端面及び第2端面を有し、
前記端子部材は、前記柱部が前記径方向における前記ヨークの外周面に対向し、前記第1固定部が前記ヨークの前記第1端面に対向し、かつ、前記第2固定部が前記ヨークの前記第2端面に対向するように、前記ヨークを前記軸方向に挟み込み、
前記巻線の一方端部は、前記端子部に絡げられた状態で固定されている、ことを特徴とするステータ。 - 前記ヨークの前記第1端面と前記第1固定部とは、嵌合されている、請求項1に記載のステータ。
- 前記ヨークの前記第1端面には、前記径方向において前記ヨークの前記外周面側に開口するように第1溝が設けられ、
前記第1溝と前記第1固定部とは、嵌合されている、請求項2に記載のステータ。 - 前記第1固定部は、前記第1溝から前記軸方向に突出している、請求項3に記載のステータ。
- 前記第1固定部は、前記軸方向において前記第1溝の内部に収まっている、請求項3に記載のステータ。
- 前記第1溝の底部には、前記第1溝の前記軸方向の寸法が前記ヨークの前記外周面側で前記内周面側よりも小さくなるように、前記軸方向に沿った第1段差部が設けられ、
前記第1固定部は、前記軸方向に突出した第1突出部を有し、
前記第1段差部と前記第1突出部とは、嵌合されている、請求項3~5のいずれかに記載のステータ。 - 前記第1溝の側部には、前記第1溝の前記周方向の寸法が前記ヨークの前記外周面側で前記内周面側よりも小さくなるように、前記周方向に沿った第2段差部が設けられ、
前記第1固定部は、前記周方向に突出した第2突出部を有し、
前記第2段差部と前記第2突出部とは、嵌合されている、請求項3~6のいずれかに記載のステータ。 - 前記第1溝は、前記周方向の寸法が前記ヨークの前記内周面側から前記外周面側に向かうにつれて小さくなるテーパー状であり、
前記第1固定部は、前記周方向の寸法が前記ヨークの前記内周面側から前記外周面側に向かうにつれて小さくなるテーパー状の第1テーパー部を有し、
前記第1溝と前記第1テーパー部とは、嵌合されている、請求項3~6のいずれかに記載のステータ。 - 前記第1溝の底部と前記第1固定部との一方には、前記軸方向に窪んだ第1凹部が設けられ、
前記第1溝の前記底部と前記第1固定部との他方には、前記軸方向に突出した第1凸部が設けられ、
前記第1凹部と前記第1凸部とは、嵌合されている、請求項3~8のいずれかに記載のステータ。 - 前記ヨークの前記第2端面と前記第2固定部とは、嵌合されている、請求項1~9のいずれかに記載のステータ。
- 前記ヨークの前記第2端面には、前記径方向において前記ヨークの前記外周面側に開口するように第2溝が設けられ、
前記第2溝と前記第2固定部とは、嵌合されている、請求項10に記載のステータ。 - 前記第2溝の底部には、前記第2溝の前記軸方向の寸法が前記ヨークの前記外周面側で前記内周面側よりも小さくなるように、前記軸方向に沿った第3段差部が設けられ、
前記第2固定部は、前記軸方向に突出した第3突出部を有し、
前記第3段差部と前記第3突出部とは、嵌合されている、請求項11に記載のステータ。 - 前記第2溝の側部には、前記第2溝の前記周方向の寸法が前記ヨークの前記外周面側で前記内周面側よりも小さくなるように、前記周方向に沿った第4段差部が設けられ、
前記第2固定部は、前記周方向に突出した第4突出部を有し、
前記第4段差部と前記第4突出部とは、嵌合されている、請求項11又は12に記載のステータ。 - 前記第2溝は、前記周方向の寸法が前記ヨークの前記内周面側から前記外周面側に向かうにつれて小さくなるテーパー状であり、
前記第2固定部は、前記周方向の寸法が前記ヨークの前記内周面側から前記外周面側に向かうにつれて小さくなるテーパー状の第2テーパー部を有し、
前記第2溝と前記第2テーパー部とは、嵌合されている、請求項11又は12に記載のステータ。 - 前記第2溝の底部と前記第2固定部との一方には、前記軸方向に窪んだ第2凹部が設けられ、
前記第2溝の前記底部と前記第2固定部との他方には、前記軸方向に突出した第2凸部が設けられ、
前記第2凹部と前記第2凸部とは、嵌合されている、請求項11~14のいずれかに記載のステータ。 - 前記ヨークの前記第1端面には、前記径方向において前記ヨークの前記外周面側に開口するように第1溝が設けられ、
前記第1溝と前記第1固定部とは、嵌合され、
前記ヨークの前記第2端面には、前記径方向において前記ヨークの前記外周面側に開口するように第2溝が設けられ、
前記第2溝と前記第2固定部とは、嵌合され、
前記第1溝及び前記第2溝の立体形状は、互いに異なる、請求項1に記載のステータ。 - 前記第1溝及び前記第2溝の前記周方向の最大寸法は、互いに異なる、請求項16に記載のステータ。
- 前記第1溝の前記周方向の最大寸法は、前記第2溝の前記周方向の最大寸法よりも大きい、請求項17に記載のステータ。
- 前記第1固定部には、ガイド溝が設けられ、
前記巻線は、一方端部側で前記ガイド溝を通るように前記端子部に向かって延びている、請求項1~18のいずれかに記載のステータ。 - 前記ヨークの前記外周面には、前記軸方向に延びる第3溝が設けられ、
前記第3溝と前記柱部とは、嵌合されている、請求項1~19のいずれかに記載のステータ。 - 複数のコイルユニットが前記周方向に環状に並んでなり、
前記複数のコイルユニットは、各々独立して、前記ステータコアが前記周方向に分割されてなる分割コアと、前記コイルと、前記端子部材と、を有している、請求項1~20のいずれかに記載のステータ。 - 前記ステータコアは、圧粉磁心で構成されている、請求項1~21のいずれかに記載のステータ。
- 請求項1~22のいずれかに記載のステータと、
前記ステータの内周面に対向して設けられたロータと、を備える、ことを特徴とするモータ。
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| JP2024571685A JPWO2024154569A1 (ja) | 2023-01-16 | 2023-12-27 | |
| CN202380061981.8A CN119769003A (zh) | 2023-01-16 | 2023-12-27 | 定子和马达 |
| US19/082,377 US20250219478A1 (en) | 2023-01-16 | 2025-03-18 | Stator and motor |
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| JP2023004457 | 2023-01-16 | ||
| JP2023-004457 | 2023-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/082,377 Continuation US20250219478A1 (en) | 2023-01-16 | 2025-03-18 | Stator and motor |
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| Publication Number | Publication Date |
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| WO2024154569A1 true WO2024154569A1 (ja) | 2024-07-25 |
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| Country | Link |
|---|---|
| US (1) | US20250219478A1 (ja) |
| JP (1) | JPWO2024154569A1 (ja) |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193843U (ja) * | 1982-06-16 | 1983-12-23 | 芝浦メカトロニクス株式会社 | 電動機 |
| JP2005051999A (ja) * | 2004-10-12 | 2005-02-24 | Honda Motor Co Ltd | 回転電機のステータ |
| JP5377805B1 (ja) * | 2013-02-07 | 2013-12-25 | 三菱電機株式会社 | 接続端子、接続端子ユニットおよび電動機 |
| WO2017018066A1 (ja) * | 2015-07-29 | 2017-02-02 | 日本電産テクノモータ株式会社 | モータおよびモータの製造方法 |
| JP2018082610A (ja) * | 2016-11-07 | 2018-05-24 | アスモ株式会社 | 車両用モータの取付構造及び車載機器 |
| JP6937929B1 (ja) * | 2020-03-06 | 2021-09-22 | 三菱電機株式会社 | ステータおよび電動機 |
-
2023
- 2023-12-27 JP JP2024571685A patent/JPWO2024154569A1/ja active Pending
- 2023-12-27 WO PCT/JP2023/047030 patent/WO2024154569A1/ja not_active Ceased
- 2023-12-27 CN CN202380061981.8A patent/CN119769003A/zh active Pending
-
2025
- 2025-03-18 US US19/082,377 patent/US20250219478A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193843U (ja) * | 1982-06-16 | 1983-12-23 | 芝浦メカトロニクス株式会社 | 電動機 |
| JP2005051999A (ja) * | 2004-10-12 | 2005-02-24 | Honda Motor Co Ltd | 回転電機のステータ |
| JP5377805B1 (ja) * | 2013-02-07 | 2013-12-25 | 三菱電機株式会社 | 接続端子、接続端子ユニットおよび電動機 |
| WO2017018066A1 (ja) * | 2015-07-29 | 2017-02-02 | 日本電産テクノモータ株式会社 | モータおよびモータの製造方法 |
| JP2018082610A (ja) * | 2016-11-07 | 2018-05-24 | アスモ株式会社 | 車両用モータの取付構造及び車載機器 |
| JP6937929B1 (ja) * | 2020-03-06 | 2021-09-22 | 三菱電機株式会社 | ステータおよび電動機 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119769003A (zh) | 2025-04-04 |
| US20250219478A1 (en) | 2025-07-03 |
| JPWO2024154569A1 (ja) | 2024-07-25 |
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