WO2023074247A1 - ステータ及びモータ - Google Patents

ステータ及びモータ Download PDF

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Publication number
WO2023074247A1
WO2023074247A1 PCT/JP2022/036395 JP2022036395W WO2023074247A1 WO 2023074247 A1 WO2023074247 A1 WO 2023074247A1 JP 2022036395 W JP2022036395 W JP 2022036395W WO 2023074247 A1 WO2023074247 A1 WO 2023074247A1
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WO
WIPO (PCT)
Prior art keywords
terminal
stator
yoke
groove
terminal member
Prior art date
Application number
PCT/JP2022/036395
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
一樹 岩▲崎▼
充俊 棗田
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2023556231A priority Critical patent/JPWO2023074247A1/ja
Publication of WO2023074247A1 publication Critical patent/WO2023074247A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present invention relates to stators and motors.
  • Patent Document 1 discloses a rotor having a plurality of magnetic poles spaced apart in the circumferential direction, and a stator surrounding the rotor.
  • the stator includes an annular stator core formed by molding magnetic powder. , an annular yoke, and a plurality of teeth projecting from the inner periphery of the yoke and spaced apart from each other with slots in the circumferential direction of the yoke.
  • An electric motor is disclosed that is provided with grooves for winding coils.
  • a bus bar is used as a wiring board for electrical connection inside the electric motor.
  • the bus bar to which the coil is connected is directly fixed to the stator core by screwing so that the bus bar extends above the stator core in the axial direction. Due to the arrangement, the electric motor becomes significantly thicker in the axial direction.
  • a stator of the present invention has an annular yoke along the circumferential direction and teeth protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and a stator core made of a compact of magnetic powder.
  • a coil composed of windings wound around the teeth; and a terminal member to which the windings are electrically connected.
  • a terminal groove is formed in an end face of the yoke in the axial direction of the stator core.
  • the terminal member is fixed to the terminal groove in a state in which one end is insulated from the terminal groove via an insulating member, and the one end of the winding wire and the one end of the terminal member are separated from each other. and a connecting portion is electrically connected so as to fit inside the terminal groove in the axial direction.
  • a motor of the present invention is characterized by comprising the stator of the present invention and a rotor provided facing the inner peripheral surface of the stator.
  • stator that can be made thinner in the axial direction of the motor. Further, according to the present invention, it is possible to provide a motor having the stator.
  • FIG. 1 is a schematic perspective view showing an example of a motor according to Embodiment 1 of the present invention.
  • FIG. 2 is an example of the stator of Embodiment 1 of the present invention, and is a schematic perspective view showing the stator in FIG. 3 is a schematic perspective view showing the coil unit in FIG. 2.
  • FIG. 4 is a schematic perspective view showing the split core in FIG. 3.
  • FIG. 5 is a schematic cross-sectional view showing the region R1 in FIG. 3 viewed from the coil side.
  • 6 is a schematic perspective view showing a terminal member in FIG. 3.
  • FIG. FIG. 7 is a schematic perspective view showing a coil unit that constitutes an example of a stator according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic perspective view showing an enlarged region R2 (excluding windings) in FIG.
  • FIG. 9 is a schematic perspective view showing a terminal groove of a split core and its vicinity in a coil unit constituting an example of a stator according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic perspective view showing a coil unit that constitutes an example of a stator according to Embodiment 4 of the present invention.
  • FIG. 11 is a schematic cross-sectional view showing the region R3 in FIG. 10 viewed from the coil side.
  • 12 is a schematic perspective view showing the terminal member in FIG. 10.
  • FIG. FIG. 13 is a schematic perspective view showing the region R3 in FIG. 10 viewed from the side opposite to the coil.
  • FIG. 14 is a schematic perspective view showing a terminal groove of a split core and its vicinity in a coil unit constituting an example of a stator according to Embodiment 5 of the present invention.
  • FIG. 15 is a schematic perspective view showing an example of a stator according to Embodiment 6 of the present invention.
  • FIG. 16 is a schematic perspective view showing an example of a stator according to Embodiment 7 of the present invention.
  • FIG. 17 is a schematic perspective view showing an example of a stator according to Embodiment 8 of the present invention.
  • stator of the present invention and the motor of the present invention will be described below. It should be noted that the present invention is not limited to the following configurations, and may be modified as appropriate without departing from the gist of the present invention.
  • the present invention also includes a combination of a plurality of individual preferred configurations described below.
  • stator of the present invention the stator of the present invention
  • motor of the present invention the motor of the present invention
  • a motor according to the present invention includes the stator according to the present invention, and a rotor provided facing the inner peripheral surface of the stator.
  • FIG. 1 is a schematic perspective view showing an example of a motor according to Embodiment 1 of the present invention.
  • the motor 1 shown in FIG. 1 has a rotor 10 and a stator 20A.
  • the rotor 10 is positioned coaxially inside and the stator 20A is positioned coaxially outside with respect to the axis AX.
  • the axis AX corresponds to the rotation axis of the rotor 10 .
  • the rotor 10 is provided facing the inner peripheral surface of the stator 20A.
  • the rotor 10 has, for example, a rotor yoke 11, a shaft 12, and permanent magnets 13.
  • the rotor yoke 11 is composed of, for example, a bulk soft magnetic material, an electromagnetic steel sheet, a dust core, a resin molded body containing a soft magnetic material, or the like.
  • the shaft 12 is inserted through the rotor yoke 11 .
  • Examples of the constituent material of the shaft 12 include metals such as stainless steel.
  • the permanent magnets 13 are provided along the outer peripheral surface of the rotor yoke 11 so that N poles and S poles are alternately arranged.
  • the rotor 10 When viewed from the direction in which the shaft 12 extends, that is, the direction in which the axis AX extends, the rotor 10 may have a substantially circular shape or a substantially polygonal shape.
  • a stator of the present invention has an annular yoke along the circumferential direction and teeth protruding from the inner peripheral surface of the yoke in the radial direction of the yoke, and a stator core made of a compact of magnetic powder. , a coil composed of windings wound around the teeth; and a terminal member to which the windings are electrically connected.
  • FIG. 2 is an example of the stator of Embodiment 1 of the present invention, and is a schematic perspective view showing the stator in FIG.
  • the stator 20A shown in FIG. 2 has a stator core 30A, multiple coils 40, and multiple terminal members 50A.
  • the stator core 30A has a yoke (also called core back) 31A and a plurality of teeth 32.
  • the direction in which the axis of the stator core extends is defined as the axial direction.
  • the axial direction of stator core 30A is parallel to the direction in which shaft 12 extends, that is, the direction in which axis AX extends.
  • the direction along the outer peripheral surface of the yoke when viewed from the axial direction is defined as the circumferential direction.
  • the direction orthogonal to the axial direction and in which the outer peripheral surface and the inner peripheral surface of the yoke face each other is defined as the radial direction.
  • the yoke 31A is annular along the circumferential direction.
  • the plurality of teeth 32 protrude independently from the inner peripheral surface of the yoke 31A in the radial direction of the yoke 31A so as to be separated from each other in the circumferential direction.
  • the multiple teeth 32 are integrated with the yoke 31A.
  • the stator core 30A is composed of a compact of magnetic powder.
  • the yoke 31A and the teeth 32 of the stator core 30A are integrally formed of magnetic powder compacts.
  • the stator core is preferably composed of a dust core.
  • the stator core 30A is preferably made of a dust core. That is, it is preferable that the yoke 31A and the teeth 32 of the stator core 30A are integrated with the dust core.
  • the stator core 30A may be composed of a molded body of a composite material containing magnetic powder and resin instead of a dust core.
  • Each of the plurality of coils 40 is composed of windings 41 wound around the teeth 32 .
  • the plurality of coils 40 are independently provided on the teeth 32 so as to be separated from each other in the circumferential direction.
  • Each of the plurality of coils 40 is insulated from the teeth 32 via, for example, an insulating member 60 which will be described later.
  • the plurality of coils 40 includes, for example, in the case of three phases, 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 by star connection or delta connection.
  • the winding 41 may be, for example, a polyurethane copper wire (UEW).
  • UEW polyurethane copper wire
  • the plurality of terminal members 50A are electrically connected to the windings 41 respectively.
  • the plurality of terminal members 50A are connected to each other so that the plurality of coils 40 form the connection as described above.
  • Examples of the constituent material of the terminal member 50A include metals such as copper.
  • the terminal members 50A include two types of terminal members 50Aa and 50Ab that are symmetrical in shape.
  • the terminal members 50Aa and the terminal members 50Ab are alternately provided so as to be separated from each other in the circumferential direction.
  • the terminal member 50Aa and the terminal member 50Ab are electrically connected to the winding wire 41 that constitutes one coil 40 by forming one set each.
  • the terminal member 50A may include only one type of terminal member having the same shape, or may include three or more types of terminal members having different shapes.
  • terminal member 50Aa and the terminal member 50Ab are not particularly distinguished, they are simply referred to as the terminal member 50A.
  • a terminal groove is provided on the end surface of the yoke in the axial direction of the stator core.
  • a plurality of terminal grooves 33A are provided on the end face of the yoke 31A in the axial direction of the stator core 30A. More specifically, the yoke 31A has end faces 31Aa and 31Ab facing each other in the axial direction as end faces in the axial direction, and a plurality of terminal grooves 33A are provided in the end face 31Aa of the yoke 31A.
  • the plurality of terminal grooves 33A may be provided on the end surface 31Ab of the yoke 31A.
  • the plurality of terminal grooves 33A are preferably provided on one end surface (end surface 31Aa or end surface 31Ab) of the yoke 31A in the axial direction.
  • some of the plurality of terminal grooves 33A may be provided on the end face 31Aa of the yoke 31A and the rest may be provided on the end face 31Ab of the yoke 31A.
  • some of the plurality of terminal grooves 33A may be provided on one end face of the yoke 31A in the axial direction, and the rest may be provided on the other end face of the yoke 31A in the axial direction.
  • the entire terminal groove 33A is exposed to the inner peripheral surface of the yoke 31A when viewed from the radial direction.
  • the entire terminal groove 33A is exposed on the outer peripheral surface of the yoke 31A when viewed from the radial direction.
  • the terminal member is fixed to the terminal groove with one end being insulated from the terminal groove via an insulating member.
  • One end of the terminal member 50A is fixed to the terminal groove 33A in a state of being insulated from the terminal groove 33A via the insulating member 60.
  • an insulating member 60 is provided on the surface of the terminal groove 33A.
  • One end portion 51Aa of the terminal member 50Aa is fixed to the terminal groove 33A in a state of being insulated from the terminal groove 33A via the insulating member 60 .
  • One end portion 51Ab of the terminal member 50Ab is fixed to the terminal groove 33A while being insulated from the terminal groove 33A via the insulating member 60.
  • the insulating member 60 is an insulating film formed by coating the surface of the terminal groove 33A with an insulating material. That is, in the example shown in FIG. 2, the surface of the terminal groove 33A is covered with an insulating film as the insulating member 60. As shown in FIG. The surface of terminal groove 33A may not be covered with an insulating film, and the surface of terminal groove 33A at one end of terminal member 50A may be covered with an insulating film. Alternatively, the surface of terminal groove 33A and the surface of terminal groove 33A at one end of terminal member 50A may each be covered with an insulating film.
  • At least one of the surface of the terminal groove 33A and the surface of the one end of the terminal member 50A on the side of the terminal groove 33A may be covered with an insulating film as the insulating member 60.
  • the entire surface of the stator core 30A is preferably covered with the insulating film. That is, as shown in FIG. 2, the entire surfaces of the yoke 31A and the teeth 32 of the stator core 30A are preferably covered with an insulating film.
  • the insulating film only needs to cover at least the portions of the surfaces of the yoke 31A and teeth 32 of the stator core 30A that come into contact with the terminal member 50A and the windings 41, and does not have to cover the entire surface.
  • Examples of methods for coating the surfaces of objects such as the stator core 30A and the terminal members 50A with an insulating film include coating methods such as electrodeposition coating.
  • the insulating member 60 may be an insulating sheet formed in advance from an insulating material instead of an insulating film formed by applying an insulating material to the surfaces of objects such as the terminal grooves 33A and the terminal members 50A.
  • the insulating sheet is formed between the terminal groove 33A and the one end of the terminal member 50A, more specifically, between the surface of the terminal groove 33A and the one end of the terminal member 50A. It is arranged at least between the surface on the side of the terminal groove 33A.
  • the thickness of the insulating member 60 is preferably 200 ⁇ m or less. Moreover, the thickness of the insulating member 60 is preferably 10 ⁇ m or more.
  • a method of fixing the one end of the terminal member 50A to the terminal groove 33A for example, a method of joining the one end of the terminal member 50A to the terminal groove 33A with a joining member such as an adhesive, or a method of joining the one end of the terminal member 50A to the terminal groove 33A. are fitted into the terminal grooves 33A, and the like.
  • the other end of the terminal member may face the outside of the yoke.
  • the other end of the terminal member 50A faces the outside of the yoke 31A. More specifically, the other end 52Aa of the terminal member 50Aa faces outward from the yoke 31A. Also, the other end 52Ab of the terminal member 50Ab faces the outside of the yoke 31A.
  • the other end of the terminal member 50A faces the outside of the yoke 31A, it is easier to connect the terminal members 50A than when the other end of the terminal member 50A does not face the outside of the yoke 31A. This facilitates connection between the wiring board, bus bar, etc. (not shown) and the other end of the terminal member 50A.
  • the other end of the terminal member may face outward from the yoke in the radial direction.
  • the other end of the terminal member 50A faces radially outward of the yoke 31A.
  • the other end 52Aa of the terminal member 50Aa faces outward from the yoke 31A in the radial direction. That is, the other end portion 52Aa of the terminal member 50Aa does not overlap the yoke 31A when viewed from the axial direction.
  • the other end 52Aa of the terminal member 50Aa overlaps the terminal groove 33A when viewed from the radial direction.
  • the other end portion 52Aa of the terminal member 50Aa does not have to overlap the terminal groove 33A when viewed from the radial direction.
  • the other end 52Ab of the terminal member 50Ab faces outward from the yoke 31A in the radial direction. That is, the other end portion 52Ab of the terminal member 50Ab does not overlap the yoke 31A when viewed from the axial direction.
  • the other end 52Ab of the terminal member 50Ab overlaps the terminal groove 33A when viewed from the radial direction.
  • the other end portion 52Ab of the terminal member 50Ab may not overlap the terminal groove 33A when viewed from the radial direction.
  • the one end portion of the winding and the one end portion of the terminal member are electrically connected such that the connection portion is accommodated inside the terminal groove in the axial direction.
  • stator in which a plurality of coil units are arranged in a ring is taken as an example of the stator of the present invention, and the manner of connection between one end of a winding and one end of a terminal member in each coil unit will be described. do.
  • a plurality of coil units may be arranged in a ring. and the terminal member.
  • the stator 20A shown in FIG. 2 includes a plurality of coil units 70A arranged in a ring.
  • FIG. 3 is a schematic perspective view showing the coil unit in FIG.
  • a coil unit 70A shown in FIG. 3 has a split core 80A, a coil 40, a terminal member 50Aa, and a terminal member 50Ab.
  • the split core 80A is formed by splitting the stator core 30A in the circumferential direction.
  • the stator core 30A is formed by annularly lining up a plurality of split cores 80A.
  • FIG. 4 is a schematic perspective view showing the split core in FIG.
  • a split core 80A shown in FIG. 4 has a split yoke 81A and teeth 32 .
  • the split yoke 81A is formed by splitting the yoke 31A in the circumferential direction.
  • the teeth 32 radially protrude from the inner peripheral surface of the split yoke 81A.
  • the teeth 32 are integrated with the split yoke 81A.
  • the split core 80A is composed of a molded body of magnetic powder.
  • the split yoke 81A and the teeth 32 of the split core 80A are integrated with a magnetic powder compact.
  • the outer circumference of the split core 80A along the circumferential direction may be curved or linear, for example.
  • the shape may be a combination of curvilinear and linear.
  • the form in which the divided yokes 81A having the above-described outer peripheries when viewed from the axial direction are arranged in the circumferential direction is included in the form in which the yoke 31A is annular along the circumferential direction.
  • the teeth 32 on the side of the split yoke 81A are preferably thinner in at least one of the axial direction and the circumferential direction than the side opposite to the split yoke 81A.
  • the teeth 32 are narrower in the circumferential direction on the side of the split yoke 81A than on the side opposite to the split yoke 81A.
  • the teeth 32 on the yoke 31A side are thinner in at least one of the axial direction and the circumferential direction than the side opposite to the yoke 31A. preferable.
  • the yoke 31A side (divided yoke 81A side) of the teeth 32 is thinner than the side opposite to the yoke 31A (the side opposite to the divided yoke 81A), the thin portion can be used as the winding axis of the coil 40. , the number of turns of the coil 40 can be increased. As a result, in the motor 1 incorporating the stator 20A, the magnetic flux penetrating the coil 40 is likely to increase, so the output torque of the motor 1 is likely to be improved.
  • the coils 40 are provided on the teeth 32 of the split core 80A.
  • two terminal grooves 33A are provided on the end surface 81Aa of the split yoke 81A in the axial direction.
  • the entire terminal groove 33A is exposed to the inner peripheral surface of the split yoke 81A.
  • the entire terminal groove 33A is exposed on the outer peripheral surface of the split yoke 81A when viewed from the radial direction.
  • one end portion 51Aa of the terminal member 50Aa is fixed to one of the two terminal grooves 33A in an insulated state via the insulating member 60.
  • One end portion 51Ab of the terminal member 50Ab is fixed to the other of the two terminal grooves 33A in an insulated state via an insulating member 60 .
  • the terminal member 50Aa is longer than the terminal groove 33A in the radial direction.
  • the other end portion 52Aa of the terminal member 50Aa faces the outside of the split yoke 81A, more specifically, the outside of the split yoke 81A in the radial direction.
  • the terminal member 50Aa may be shorter than the terminal groove 33A in the radial direction. In this case, it is preferable that the entire terminal member 50Aa is fixed to the terminal groove 33A in a state of being insulated from the terminal groove 33A via the insulating member 60 .
  • the terminal member 50Ab is longer than the terminal groove 33A in the radial direction.
  • the other end 52Ab of the terminal member 50Ab faces the outside of the split yoke 81A, more specifically, the outside of the split yoke 81A in the radial direction.
  • the terminal member 50Ab may be shorter than the terminal groove 33A in the radial direction. In this case, it is preferable that the entire terminal member 50Ab be fixed to the terminal groove 33A in a state of being insulated from the terminal groove 33A via the insulating member 60 .
  • the one end 41a of the winding 41 and the one end 51Aa of the terminal member 50Aa are electrically connected.
  • the one end portion 51Aa of the terminal member 50Aa is fixed to the terminal groove 33A, so that the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa are electrically connected.
  • the one end portion 41a of the winding 41 can be fixed to the terminal groove 33A via the one end portion 51Aa of the terminal member 50Aa. Accordingly, as a structure for pulling out the coil 40 to the outside, one end portion 41a of the flexible winding 41 can be converted into a strong terminal member 50Aa fixed to the terminal groove 33A.
  • the stator 20A when manufacturing the stator 20A by arranging the plurality of coil units 70A in an annular shape, or when manufacturing the motor 1 using the stator 20A, the work can be easily performed without damaging the one end portion 41a of the winding 41. As a result, the reliability of the motor 1 is improved.
  • FIG. 5 is a schematic cross-sectional view showing the region R1 in FIG. 3 viewed from the coil side. Note that the insulating member 60 is not shown in FIG.
  • the one end 41a of the winding wire 41 and the one end 51Aa of the terminal member 50Aa are electrically connected so that the connection point fits inside the terminal groove 33A in the axial direction. That is, the connecting portion between the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa is accommodated inside the terminal groove 33A in the axial direction.
  • the one end portion 41a of the winding 41 and the one end portion 51Aa of the terminal member 50Aa are directly connected, and the connection portion is accommodated inside the terminal groove 33A in the axial direction.
  • the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa may be electrically connected via a conductive member such as solder.
  • the connecting portion between the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa corresponds to the arrangement area of the conductive member.
  • the one end 41a of the winding 41 and the one end 51Aa of the terminal member 50Aa are connected to each other in the stator 20A in which the plurality of coil units 70A are arranged in a ring. They are electrically connected so as to fit inside the terminal groove 33A in the axial direction.
  • the connecting portion between the one end 41a of the winding 41 and the one end 51Aa of the terminal member 50Aa is accommodated inside the terminal groove 33A in the axial direction. and the one end portion 51Aa of the terminal member 50Aa does not protrude beyond the highest point of the yoke 31A in the axial direction. This makes it possible to reduce the thickness of the motor 1 in the axial direction.
  • one end portion 41a of the winding 41 is accommodated inside the terminal groove 33A in the axial direction.
  • one end portion 51Aa of the terminal member 50Aa is accommodated inside the terminal groove 33A in the axial direction.
  • At least one of the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa is accommodated inside the terminal groove 33A in the axial direction. Furthermore, as shown in FIG. 5, it is particularly preferable that both the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa are accommodated inside the terminal groove 33A in the axial direction.
  • the terminal groove 33A in which the connecting portion between the one end portion 41a of the winding 41 and the one end portion 51Aa of the terminal member 50Aa is accommodated is formed at the same time as the stator core 30A is formed, here the split core 80A is formed. be. Therefore, when manufacturing the stator 20A, the axial end face of the molded stator core 30A is partially removed in order to provide the terminal groove 33A. There is no need to perform an additional process such as removing the Therefore, when the stator 20A is manufactured, damage to the stator core 30A, here, the split core 80A, is suppressed when the terminal grooves 33A are provided. As a result, a decrease in the strength of the stator core 30A, here, the split core 80A, is suppressed.
  • the bottom surface of the terminal groove may be curved.
  • the bottom surface of the terminal groove 33A shown in FIG. 5 is curved.
  • a terminal groove 33A having a curved bottom surface as shown in FIG. 5 is easier to form than a terminal groove 33B having a flat bottom surface as shown in FIG. 11 described later. This difference in easiness of molding tends to be particularly noticeable when the stator core 30A, here the split core 80A, is made of a dust core.
  • the one end of the terminal member when the terminal groove has a curved bottom surface, the one end of the terminal member includes a curved first portion along the bottom surface of the terminal groove and one end of the first portion. the one end of the winding is sandwiched between the first and second portions of the terminal member inside the terminal groove and fixed. It is preferable that
  • FIG. 6 is a schematic perspective view showing the terminal member in FIG.
  • One end portion 51Aa of the terminal member 50Aa shown in FIGS. 5 and 6 has a first portion 53Aa and a second portion 54Aa.
  • the first portion 53Aa of the terminal member 50Aa is curved along the bottom surface of the terminal groove 33A.
  • the second portion 54Aa of the terminal member 50Aa extends from one end of the first portion 53Aa.
  • the second portion 54Aa of the terminal member 50Aa is curved.
  • the second portion 54Aa of the terminal member 50Aa may be flat.
  • one end 41a of the winding 41 is fixed inside the terminal groove 33A by being sandwiched between the first portion 53Aa and the second portion 54Aa of the terminal member 50Aa.
  • the one end portion 41a of the winding wire 41 and the one end portion 51Aa of the terminal member 50Aa are electrically connected, and the connection portion is accommodated inside the terminal groove 33A in the axial direction.
  • one end portion 41a of winding 41 and one end portion 51Aa of terminal member 50Aa are to be electrically connected via a conductive member such as solder
  • one end portion 41a of winding 41 is It can be temporarily fixed by sandwiching between the first portion 53Aa and the second portion 54Aa of the terminal member 50Aa.
  • the one end of the terminal member preferably further has a linear third portion extending in the axial direction from the other end of the first portion.
  • the one end portion 51Aa of the terminal member 50Aa shown in FIGS. 5 and 6 further has a third portion 55Aa.
  • the third portion 55Aa of the terminal member 50Aa is linear and extends axially from the other end of the first portion 53Aa.
  • the terminal member 50Aa further has the third portion 55Aa, when the one end portion 41a of the winding wire 41 is to be fixed to the one end portion 51Aa of the terminal member 50Aa, the terminal member 50Aa does not fit into the terminal groove 33A. It can be prevented from rotating along the bottom surface. As a result, the working efficiency of fixing the one end portion 41a of the winding wire 41 to the one end portion 51Aa of the terminal member 50Aa is improved.
  • the other end 41b of the winding 41 and one of the terminal members 50Ab are connected in the same manner as the connection between the one end 41a of the winding 41 and the one end 51Aa of the terminal member 50Aa. It is preferable that the end portion 51Ab is electrically connected so that the connection portion is accommodated inside the terminal groove 33A in the axial direction.
  • a preferable aspect of the other end portion 41b of the winding 41 is also the same as the preferable aspect of the one end portion 41a of the winding 41 described above.
  • a preferable aspect of the one end portion 51Ab of the terminal member 50Ab is also the same as the preferable aspect of the one end portion 51Aa of the terminal member 50Aa described above.
  • the windings 41 and the terminal members 50A are electrically connected at a plurality of connection points.
  • the stator 20A if at least one connection point among a plurality of connection points between the windings 41 and the terminal members 50A is accommodated inside the terminal groove 33A in the axial direction, the inside of the terminal groove 33A in the axial direction There may be connection points that do not fit in the
  • the end surface of the yoke in the axial direction has a radially extending portion extending between the inner peripheral surface of the yoke and the terminal groove so as to be narrower than the terminal groove in the circumferential direction. Further, it is preferable that a first groove insulated from the winding through the insulating member is further provided.
  • a stator that is different from the stator of the first embodiment of the present invention in this point will be described below as a stator of the second embodiment of the present invention.
  • FIG. 7 is a schematic perspective view showing a coil unit that constitutes an example of the stator of Embodiment 2 of the present invention.
  • FIG. 8 is a schematic perspective view showing an enlarged region R2 (excluding windings) in FIG.
  • a coil unit 70B shown in FIG. 7 has a split core 80B, a coil 40, a terminal member 50Aa, and a terminal member 50Ab.
  • the split core 80B has a split yoke 81B and teeth 32.
  • two first grooves 34 are provided corresponding to the two terminal grooves 33A on the end face 81Ba of the split yoke 81B in the axial direction.
  • the first groove 34 radially penetrates between the inner peripheral surface of the split yoke 81B and the terminal groove 33A so as to be narrower than the terminal groove 33A in the circumferential direction. . That is, in the split core 80B, the entire terminal groove 33A is not exposed to the inner peripheral surface of the split yoke 81B when viewed from the radial direction.
  • the first groove 34 is insulated from the winding 41 via the insulating member 60 . More specifically, one of the two first grooves 34 is insulated from the one end 41 a of the winding 41 via the insulating member 60 . The other of the two first grooves 34 is insulated from the other end 41 b of the winding 41 via the insulating member 60 .
  • coil unit 70B if first groove 34 is provided in end surface 81Ba of divided yoke 81B in the axial direction, one end 41a of winding 41 is passed through first groove 34 and one end of terminal member 50Aa is inserted. 51Aa. Further, when the one end 41a of the winding 41 is sandwiched between the one end 51Aa of the terminal member 50Aa and fixed, the one end 41a of the winding 41 can be temporarily fixed by hooking the first groove .
  • the other end 41b of the winding 41 can be passed through the first groove 34 and electrically connected to the one end 51Ab of the terminal member 50Ab. Furthermore, when the other end 41b of the winding 41 is to be sandwiched between the one end 51Ab of the terminal member 50Ab and fixed, the other end 41b of the winding 41 can be temporarily fixed by hooking it on the first groove .
  • the split yoke 81B is positioned around the first groove 34 and is located on the inner circumference of the split yoke 81B.
  • the end surface of the yoke 31A in the axial direction has terminal grooves 33A and the terminal grooves 33A in the circumferential direction.
  • a first groove 34 radially penetrates between the inner peripheral surface of the yoke 31A and the terminal groove 33A and is insulated from the winding 41 via an insulating member 60 is further provided. It will be.
  • the motor of Embodiment 2 of the present invention is the same as the motor of Embodiment 1 of the present invention except that it has the stator of Embodiment 2 of the present invention.
  • stator of the present invention it is preferable that a bottom surface of the terminal groove is provided with a depression.
  • a stator that is different from the stator of the first embodiment of the present invention in this point will be described below as a stator of the third embodiment of the present invention.
  • FIG. 9 is a schematic perspective view showing terminal grooves of split cores and their vicinity in a coil unit constituting an example of a stator according to Embodiment 3 of the present invention.
  • the end surface 81Ca of the split yoke 81C in the axial direction is provided with a terminal groove 33A.
  • a groove 83 as a depression is provided on the bottom surface of the terminal groove 33A.
  • the groove 83 is provided on the bottom surface of the terminal groove 33A, when one end of the terminal member 50A is to be bonded to the terminal groove 33A with a bonding material such as an adhesive, the groove 83 is filled with the bonding material. Therefore, the working efficiency of joining the one end of the terminal member 50A to the terminal groove 33A is improved.
  • the groove 83 is provided on the bottom surface of the terminal groove 33A, heat is less likely to be conducted from the terminal member 50A fixed to the terminal groove 33A to the split yoke 81C. Therefore, when attempting to solder the winding 41 and the terminal member 50A, the soldering is facilitated, and the split yoke 81C is prevented from being damaged by heat during soldering.
  • the planar shape of the groove 83 is not limited to the shape extending in the circumferential direction and radial direction as shown in FIG. 9, and may be other shapes.
  • the bottom surface of the terminal groove 33A is provided with a groove 83 as a depression.
  • a groove is shown as an example of the recess provided on the bottom surface of the terminal groove, but it may be a hole as shown in Embodiment 5 to be described later.
  • the depression provided on the bottom surface of the terminal groove may include both grooves and holes.
  • the bottom surface of the terminal groove is provided with a recess
  • the bottom surface of the terminal groove may be provided with a recess in comparison with the second embodiment.
  • the motor of Embodiment 3 of the present invention is similar to the motor of Embodiment 1 of the present invention except that it has the stator of Embodiment 3 of the present invention.
  • the bottom surface of the terminal groove may be flat.
  • the terminal member preferably has at least one flat portion. A stator that is different from the stator of Embodiment 1 of the present invention in this point will be described below as a stator of Embodiment 4 of the present invention.
  • FIG. 10 is a schematic perspective view showing a coil unit that constitutes an example of the stator of Embodiment 4 of the present invention.
  • a coil unit 70D shown in FIG. 10 has a split core 80D, a coil 40, a terminal member 50Ba, and a terminal member 50Bb.
  • the split core 80D has a split yoke 81D and teeth 32.
  • Two terminal grooves 33B are provided on the end face 81Da of the split yoke 81D in the axial direction.
  • One end portion 51Ba of the terminal member 50Ba is fixed to one of the two terminal grooves 33B in an insulated state via an insulating member 60 .
  • one end portion 51Bb of the terminal member 50Bb is fixed to the other of the two terminal grooves 33B in an insulated state via an insulating member 60 .
  • the other end 52Ba of the terminal member 50Ba faces the outside of the split yoke 81D, more specifically, the outside of the split yoke 81D in the radial direction. Further, the other end portion 52Bb of the terminal member 50Bb faces the outside of the split yoke 81D, more specifically, the outside of the split yoke 81D in the radial direction.
  • terminal member 50Ba and the terminal member 50Bb are not particularly distinguished, they are simply referred to as the terminal member 50B.
  • FIG. 11 is a schematic cross-sectional view showing the state of region R3 in FIG. 10 viewed from the coil side. Note that the insulating member 60 is not shown in FIG.
  • the one end portion 41a of the winding 41 and the one end portion 51Ba of the terminal member 50Ba are electrically connected so that the connecting portion fits inside the terminal groove 33B in the axial direction. That is, the connecting portion between the one end portion 41a of the winding wire 41 and the one end portion 51Ba of the terminal member 50Ba is accommodated inside the terminal groove 33B in the axial direction.
  • the bottom surface of the terminal groove 33B shown in FIG. 11 is flat. More specifically, the bottom surface of the terminal groove 33B to which the one end portion 51Ba of the terminal member 50Ba is fixed is flat.
  • FIG. 12 is a schematic perspective view showing the terminal member in FIG. 10.
  • FIG. 12 is a schematic perspective view showing the terminal member in FIG. 10.
  • a terminal member 50Ba shown in FIG. 12 has at least one flat portion.
  • the terminal member 50Ba is composed only of flat portions.
  • one end portion 51Ba of the terminal member 50Ba is flat along the bottom surface of the terminal groove 33B.
  • a terminal member 50Ba having a flat portion as shown in FIG. 12 is easier to work with sheet metal during fabrication than a terminal member 50Aa having a curved shape as shown in FIG.
  • the outer peripheral surface of the yoke is provided with a second groove extending in the axial direction from the terminal groove and insulated from the terminal member via the insulating member. , and a part on the other end side is preferably folded back so as to be positioned inside the second groove.
  • FIG. 13 is a schematic perspective view showing the state of region R3 in FIG. 10 viewed from the side opposite to the coil.
  • a second groove 35 is provided on the outer peripheral surface of the split yoke 81D shown in FIG.
  • the second groove 35 extends axially (downward in the axial direction in FIG. 13) from the terminal groove 33B.
  • the second groove 35 is insulated from the terminal member 50Ba via the insulating member 60.
  • an insulating member 60 is provided on the surface of the second groove 35 .
  • the insulating member 60 is an insulating film formed by coating the surface of the second groove 35 with an insulating material. That is, in the example shown in FIG. 13 , the surface of the second groove 35 is covered with an insulating film as the insulating member 60 . The surface of the second groove 35 may not be covered with the insulating film, and the surface of the terminal member 50Ba on the second groove 35 side may be covered with the insulating film. Alternatively, the surface of the second groove 35 and the surface of the terminal member 50Ba on the second groove 35 side may each be covered with an insulating film.
  • At least one of the surface of the second groove 35 and the surface of the terminal member 50Ba on the second groove 35 side may be covered with an insulating film as the insulating member 60 .
  • the terminal member 50Ba is preferably folded back so that a part of the other end 52Ba side is positioned inside the second groove 35. As shown in FIG. In this case, a portion of the terminal member 50Ba on the side of the other end portion 52Ba fits into the second groove 35, thereby facilitating positioning of the terminal member 50Ba.
  • the bottom surface of the terminal groove 33B is flat, and the terminal member 50Ba has at least one flat portion in the stator in which the plurality of coil units 70D are arranged in an annular shape. It means that Further, in the stator in which the plurality of coil units 70D are arranged in a ring, preferably, the outer peripheral surface of the yoke 31A has a coil extending axially from the terminal groove 33B and insulated from the terminal member 50Ba via the insulating member 60. A second groove 35 is provided, and the terminal member 50Ba is folded back so that a portion on the side of the other end 52Ba is positioned inside the second groove 35. As shown in FIG.
  • the other end 41b of the winding 41 and one of the terminal members 50Bb are connected in the same manner as the connection between the one end 41a of the winding 41 and the one end 51Ba of the terminal member 50Ba. It is preferable that the end portion 51Bb is electrically connected such that the connection portion is accommodated inside the terminal groove 33B in the axial direction.
  • the terminal groove 33B to which the one end 51Bb of the terminal member 50Bb is fixed is flat like the terminal groove 33B to which the one end 51Ba of the terminal member 50Ba is fixed. is preferred.
  • the terminal member 50Bb similarly to the terminal member 50Ba, the terminal member 50Bb preferably has at least one flat portion.
  • the outer peripheral surface of the split yoke 81D extends axially from the terminal groove 33B to which one end portion 51Bb of the terminal member 50Bb is fixed.
  • a second groove insulated from is provided.
  • the terminal member 50Bb is folded back so that a portion of the other end portion 52Bb side is positioned inside the second groove.
  • a motor according to Embodiment 4 of the present invention is the same as the motor according to Embodiment 1 of the present invention except that it has a stator according to Embodiment 4 of the present invention.
  • a bottom surface of the terminal groove is provided with a depression.
  • a stator that is different from the stator of the fourth embodiment of the present invention in this point will be described below as a stator of the fifth embodiment of the present invention.
  • FIG. 14 is a schematic perspective view showing terminal grooves of split cores and their vicinity in a coil unit constituting an example of a stator according to Embodiment 5 of the present invention.
  • the terminal groove 33B is provided on the end surface 81Ea of the split yoke 81E in the axial direction.
  • a hole 84 as a depression is provided in the bottom surface of the terminal groove 33B.
  • the hole 84 is provided in the bottom surface of the terminal groove 33B, when one end of the terminal member 50B is to be joined to the terminal groove 33B with a joining member such as an adhesive, the hole 84 is filled with the joining member. Therefore, the working efficiency of joining the one end portion of the terminal member 50B to the terminal groove 33B is improved.
  • the hole 84 is provided in the bottom surface of the terminal groove 33B, heat is less likely to be conducted from the terminal member 50B fixed to the terminal groove 33B to the split yoke 81E. Therefore, when attempting to solder the winding 41 and the terminal member 50B, the soldering is facilitated, and the split yoke 81E is prevented from being damaged by heat during soldering.
  • the planar shape of the hole 84 is not limited to a rectangular shape as shown in FIG. 14, and may be another shape.
  • the number of holes 84 is not limited to three as shown in FIG. 14, and may be one, two, or four or more.
  • these holes 84 may be aligned in one direction (radial direction in FIG. 14) as shown in FIG. You don't have to.
  • the intervals between these holes 84 may be the same, different, or partly different.
  • the bottom surface of the terminal groove 33B is provided with a hole 84 as a depression.
  • a hole is shown as an example of the depression provided on the bottom surface of the terminal groove, but the groove as shown in the third embodiment may be used.
  • the recess provided on the bottom surface of the terminal groove may include both the hole and the groove.
  • the motor of Embodiment 5 of the present invention is the same as the motor of Embodiment 1 of the present invention except that it has the stator of Embodiment 5 of the present invention.
  • stator of the present invention the other end of the terminal member may face outward from the yoke in the axial direction.
  • a stator that is different from the stator of the first embodiment of the present invention in this point will be described below as a stator of the sixth embodiment of the present invention.
  • FIG. 15 is a schematic perspective view showing an example of a stator according to Embodiment 6 of the present invention.
  • the other end of the terminal member 50A faces outward from the yoke 31A in the axial direction. That is, the other end of the terminal member 50A does not overlap the yoke 31A when viewed in the radial direction.
  • the stator 20B looks thicker in the axial direction.
  • a wiring substrate (not shown) for connecting the terminal members 50A
  • terminals provided so as to face the terminal members 50A are provided on the outer peripheral surface, and the dimension in the axial direction is the yoke.
  • the motor is constructed by arranging the wiring board, which is not significantly different in dimension from the terminal member 50A protruding from 31A in the axial direction, on the side of the terminal member 50A with respect to the stator 20B, the terminal member 50A and the terminals of the wiring board are arranged. can be efficiently and directly connected, and further, the thickness of the motor in the axial direction can be suppressed as much as possible.
  • the other end of the terminal member 50A overlaps the yoke 31A when viewed from the axial direction.
  • the other end of the terminal member 50A does not have to overlap the yoke 31A when viewed from the axial direction.
  • a motor according to Embodiment 6 of the present invention is similar to the motor according to Embodiment 1 of the present invention except that it has a stator according to Embodiment 6 of the present invention.
  • the stator core may have an integrated structure that is not divided into the split cores, instead of the split structure that is divided into the split cores.
  • a stator that is different from the stator of Embodiment 1 of the present invention in this point will be described below as a stator of Embodiment 7 of the present invention.
  • FIG. 16 is a schematic perspective view showing an example of a stator according to Embodiment 7 of the present invention.
  • stator core 30B is not divided into split cores unlike the stator core 30A shown in FIGS. That is, unlike the yoke 31A shown in FIGS. 2 and 15, the yoke 31B of the stator core 30B is not split into split yokes.
  • the number of coils 40 is greater in the stator 20A shown in FIG. This is because a plurality of coil units 70A each having a coil 40 are arranged in a ring when the stator 20A is manufactured, so that the coils 40 can be densely arranged as a result. As described above, in the stator 20A, the coils 40 are arranged more densely than in the stator 20C, so it becomes easier to improve the characteristics of the motor.
  • the coils 40 are arranged more densely than in the stator 20C, so it is easier to improve the characteristics of the motor.
  • the motor of Embodiment 7 of the present invention is similar to the motor of Embodiment 1 of the present invention except that it has the stator of Embodiment 7 of the present invention.
  • Embodiment 8 A stator that differs from the stator of the sixth embodiment in that the stator core has an integral structure will be described below as a stator of the eighth embodiment of the present invention. Also, the stator of Embodiment 8 of the present invention differs from the stator of Embodiment 7 of the present invention in that the other end of the terminal member faces outward from the yoke in the axial direction.
  • FIG. 17 is a schematic perspective view showing an example of a stator according to Embodiment 8 of the present invention.
  • stator core 30B is not divided into split cores unlike the stator core 30A shown in FIGS. That is, unlike the yoke 31A shown in FIGS. 2 and 15, the yoke 31B of the stator core 30B is not split into split yokes.
  • the coils 40 are arranged more densely than in the stator 20D, so it is easier to improve the characteristics of the motor.
  • the coils 40 are arranged more densely than in the stator 20D, so it is easier to improve the characteristics of the motor.
  • the motor of Embodiment 8 of the present invention is similar to the motor of Embodiment 1 of the present invention except that it has the stator of Embodiment 8 of the present invention.
  • Embodiment 7 shows an example in which the stator core is integrated with respect to Embodiment 1
  • Embodiment 8 shows an example in which the stator core is integrated with Embodiment 6.
  • the stator core may be of an integral configuration.
  • the stator of the present invention may be used not only as a component of a motor, but also as a component of a generator, for example.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
PCT/JP2022/036395 2021-10-28 2022-09-29 ステータ及びモータ WO2023074247A1 (ja)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008043106A (ja) * 2006-08-08 2008-02-21 Sumitomo Electric Ind Ltd モータ用分割コア
JP2008061408A (ja) * 2006-08-31 2008-03-13 Jtekt Corp 電動モータ
JP2008199791A (ja) * 2007-02-13 2008-08-28 Daikin Ind Ltd 電機子、回転電機、圧縮機、送風機、空気調和機

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Publication number Priority date Publication date Assignee Title
JPS6034741U (ja) * 1983-08-12 1985-03-09 株式会社東芝 電動機のステ−タ
JP4077673B2 (ja) * 2002-07-17 2008-04-16 本田技研工業株式会社 回転電機
JP2021005937A (ja) * 2019-06-26 2021-01-14 三菱電機株式会社 回転電機の固定子、回転電機の固定子の製造装置及び回転電機の固定子の製造方法
EP4007127A4 (en) * 2019-07-31 2023-04-19 Toshiba Carrier Corporation ELECTRIC MOTOR, COMPRESSOR, REFRIGERATION CIRCUIT DEVICE, AND METHOD FOR MAKING AN ELECTRIC MOTOR
JP7429521B2 (ja) * 2019-11-19 2024-02-08 ミネベアミツミ株式会社 モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008043106A (ja) * 2006-08-08 2008-02-21 Sumitomo Electric Ind Ltd モータ用分割コア
JP2008061408A (ja) * 2006-08-31 2008-03-13 Jtekt Corp 電動モータ
JP2008199791A (ja) * 2007-02-13 2008-08-28 Daikin Ind Ltd 電機子、回転電機、圧縮機、送風機、空気調和機

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