WO2024252844A1 - Stator et moteur sans fer - Google Patents

Stator et moteur sans fer Download PDF

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Publication number
WO2024252844A1
WO2024252844A1 PCT/JP2024/017350 JP2024017350W WO2024252844A1 WO 2024252844 A1 WO2024252844 A1 WO 2024252844A1 JP 2024017350 W JP2024017350 W JP 2024017350W WO 2024252844 A1 WO2024252844 A1 WO 2024252844A1
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WIPO (PCT)
Prior art keywords
main body
air
axial direction
core coil
stator
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Pending
Application number
PCT/JP2024/017350
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English (en)
Japanese (ja)
Inventor
裕也 前田
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2024252844A1 publication Critical patent/WO2024252844A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • 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

Definitions

  • This disclosure relates to a stator and a coreless motor, and more specifically to a stator including a cylindrical main body portion that constitutes a back yoke and an air-core coil disposed inside the cylindrical main body portion, and a coreless motor including this stator.
  • Patent Document 1 discloses a conventional brushless motor.
  • a winding coil section with a copper pattern printed on a flexible substrate is attached to the inner surface of a hollow cylindrical stator yoke. Since this brushless motor does not have a slotted iron core, it is possible to achieve low loss and low noise.
  • the objective of this disclosure is to provide a stator and coreless motor that can easily restrict movement of the air-core coil relative to the yoke portion.
  • a stator includes a yoke portion and a plurality of air-core coils.
  • the yoke portion is annular around the axis of the rotor.
  • the air-core coils are disposed inside the yoke portion.
  • the yoke portion has a main body cylindrical portion and a movement restricting portion.
  • the main body cylindrical portion has the air-core coils disposed along its inner circumferential surface to form a back yoke.
  • the movement restricting portion protrudes toward the axis from the main body cylindrical portion.
  • the movement restricting portion has an axial restricting portion and a radial restricting portion.
  • the axial restricting portion restricts the air-core coils from moving in the axial direction along which the axis extends.
  • the radial restricting portion restricts the air-core coils from moving in a radial direction perpendicular to the axis.
  • a coreless motor includes the above stator and the above rotor.
  • stator and coreless motor disclosed herein can easily restrict movement of the air-core coil relative to the yoke portion.
  • FIG. 1 is a cross-sectional view of a coreless motor according to a first embodiment, taken along a cross section perpendicular to the axial direction.
  • FIG. 2A is a cross-sectional view of the coreless motor taken along a cross section passing through the axis of a stator of the coreless motor.
  • FIG. 2B is a cross-sectional view taken along a cross section passing through the axis of the stator, illustrating a manufacturing method of the stator.
  • FIG. 3 is a cross-sectional view taken along a cross section passing through the axis of a stator according to the second embodiment.
  • FIG. 4 is a cross-sectional view of a section passing through the axis of a stator according to the third embodiment.
  • FIG. 1 is a cross-sectional view of a coreless motor according to a first embodiment, taken along a cross section perpendicular to the axial direction.
  • FIG. 2A is a cross-sectional view of the coreless
  • FIG. 5A is a cross-sectional view of a section passing through the axis of a stator according to a fourth embodiment.
  • FIG. 5B is a perspective view of a main part of the stator.
  • FIG. 5C is a plan view of the cylindrical main body portion and the movement restricting portion of the stator.
  • FIG. 6A is a cross-sectional view of a cross section passing through the axis of a stator according to a fifth embodiment.
  • FIG. 6B is a plan view of the cylindrical main body portion and the movement restricting portion of the stator.
  • FIG. 6C is a perspective view of a main part of the stator.
  • FIG. 7 is a cross-sectional view of a section passing through the axis of a stator according to the sixth embodiment.
  • FIG. 8A is a cross-sectional view taken along a cross section passing through the axis of an assembly piece of a stator according to a seventh embodiment.
  • FIG. 8B is a perspective view of the above assembly piece.
  • FIG. 8C is a plan view of the stator.
  • FIG. 9A is a cross-sectional view of a section passing through the axis of a stator according to an eighth embodiment.
  • FIG. 9B is a plan view of the cylindrical main body portion and the movement restricting portion of the stator.
  • FIG. 9C is a perspective view of a main part of the stator.
  • FIG. 10 is a cross-sectional view of a section passing through the axis of a stator according to a ninth embodiment.
  • FIG. 11 is a cross-sectional view of a section passing through the axis of a stator according to the tenth embodiment.
  • the coreless motor 1 (see, for example, FIG. 1) according to the present disclosure comprises a stator 11 and a rotor 12.
  • the stator 11 (see, for example, FIG. 2A and FIG. 2B) comprises a yoke portion 2 and a plurality of air-core coils 3.
  • the yoke portion 2 is annular around the axis 10 of the rotor 12 (see FIG. 1).
  • the air-core coils 3 are disposed inside the yoke portion 2.
  • the yoke portion 2 has a main body tube portion 20 and a movement restricting portion 4.
  • the main body tube portion 20 has the air-core coils 3 disposed along the inner circumferential surface 21 to form a back yoke.
  • the movement restricting portion 4 protrudes toward the axis 10 from the main body tube portion 20.
  • the movement restricting portion 4 has an axial restricting portion 411 and a radial restricting portion 412.
  • the axial restricting portion 411 restricts the air-core coils 3 from moving in the axial direction to which the axis 10 extends.
  • the radial restriction portion 412 restricts the air-core coil 3 from moving in the radial direction perpendicular to the axis 10.
  • the above-mentioned coreless motor 1 and stator 11 restrict the movement of the air-core coil 3 relative to the yoke portion 2, making it easy to position or attach the air-core coil 3 to the yoke portion 2.
  • FIG. 1 is a cross-sectional view taken along a cross section perpendicular to the axial direction of the coreless motor 1 according to the first embodiment.
  • Fig. 2A is a cross-sectional view taken along a cross section passing through the axis 10 of the stator 11 of the coreless motor 1 according to the first embodiment.
  • Fig. 2B is a cross-sectional view taken along a cross section passing through the axis 10 of the stator 11 to explain a method of manufacturing the stator 11 according to the first embodiment.
  • the coreless motor 1 includes a stator 11 and a rotor 12.
  • the rotor 12 is disposed inside the stator 11.
  • the coreless motor 1 is an inner rotor type motor.
  • the coreless motor 1 is also a three-phase AC motor.
  • the rotor 12 rotates around the axis 10.
  • the rotor 12 has a cylindrical rotating shaft 121 extending in the direction in which the axis 10 extends (hereinafter referred to as the axial direction), a rotor core 122 having an annular shape and into which the rotating shaft 121 is fitted, and a plurality of magnets 123.
  • the rotor core 122 is provided with a plurality of magnets 123 (eight in the illustrated example) spaced apart from one another in the circumferential direction around the axis 10. Adjacent magnets 123 are provided on the rotor core 122 such that different poles are located on the side facing the axis 10.
  • one pole e.g., a north pole
  • the other pole e.g., a south pole
  • the rotating shaft 121 is attached to a rotating body (not shown) that is the output destination, and transmits torque and power to the rotating body.
  • the stator 11 includes a yoke portion 2 and a plurality of air-core coils 3 .
  • Air-core coil The air-core coil 3 is disposed inside the yoke portion 2, and generates torque in the rotor 12.
  • the air-core coil 3 is composed of a coil winding wound approximately concentrically.
  • the air-core coil 3 does not have a core inside.
  • the inside of the air-core coil 3 is hollow.
  • the air-core coil 3 has an inner circumferential surface 32 facing the hollow portion, and an outer circumferential surface 31 opposite the inner circumferential surface 32.
  • the stator 11 is provided with a plurality of air-core coils 3.
  • two air-core coils 3 are provided for each phase of the U, V, and W phases.
  • the magnetic flux generated by the plurality of air-core coils 3 generates an electromagnetic force that rotates the rotor 12.
  • the yoke part 2 is annular around the axis 10 of the rotor 12.
  • the yoke part 2 has a main cylindrical part 20 and a movement restricting part 4.
  • the cylinder body 20 is formed of a cylinder having an annular shape as viewed in the axial direction, surrounding the rotor 12 on the outside in a direction perpendicular to the axis 10 of the rotor 12 (radial direction).
  • the cylinder body 20 has a plurality of steel plates laminated in the axial direction.
  • the steel plates are formed of electromagnetic steel plates such as silicon steel plates.
  • the air-core coil 3 is arranged along the inner peripheral surface 21 of the main body tube portion 20, which constitutes the back yoke.
  • the movement restricting portion 4 protrudes toward the axis 10 (i.e., inward) from the main body cylindrical portion 20.
  • the movement restricting portion 4 restricts the air-core coil 3, which is arranged at a predetermined position along the inner circumferential surface 21 of the main body cylindrical portion 20, from moving relative to the yoke portion 2.
  • the movement restricting portion 4 has an axial direction restricting portion 411 and a radial direction restricting portion 412.
  • the yoke portion 2 has, as the movement restricting portion 4, an end portion restricting portion 40 formed at an end portion in the axial direction of the main body cylindrical portion 20.
  • the yoke portion 2 has a first end restriction portion 41.
  • the first end restriction portion 41 is formed at a first end portion (lower side in FIG. 2A) in the axial direction of the main body tube portion 20.
  • the first end restriction portion 41 (end restriction portion 40) has an axial restriction portion 411 and a radial restriction portion 412.
  • the axial direction restricting portion 411 is a flange piece that protrudes inward (toward the axis 10) from a first end in the axial direction of the main body tube portion 20.
  • This flange piece is an annular inner flange when viewed in the axial direction (see FIG. 1).
  • the axial direction restricting portion 411 is formed over the entire circumferential length of the main body tube portion 20.
  • the axial direction restricting portion 411 is preferably formed from the same material as the main body tube portion 20. Specifically, the axial direction restricting portion 411 is formed from the same steel plate (particularly electromagnetic steel plate) as the main body tube portion 20.
  • the axial restriction portion 411 restricts the movement of the air-core coil 3 in the axial direction along which the shaft center 10 extends. More specifically, the axial restriction portion 411 restricts the movement of the outer peripheral surface 31 of the air-core coil 3. When the air-core coil 3 moves along the axial direction toward the axial restriction portion 411, the outer peripheral surface 31 of the air-core coil 3 comes into contact with the axial restriction portion 411, preventing further movement of the air-core coil 3.
  • the radial regulating portion 412 is a tubular piece that protrudes from the radial tip (inner end) of the axial regulating portion 411 toward the second end side (upper side in FIG. 2A) of the main body tube portion 20 in the axial direction.
  • the radial regulating portion 412 is formed in an annular shape when viewed in the axial direction.
  • the radial regulating portion 412 is formed over the entire circumferential length of the axial regulating portion 411.
  • the first end regulating portion 41 end regulating portion 40
  • the radial regulating portion 412 is also disposed in a part of the portion corresponding to the air-core coil 3 in the axial direction.
  • portion corresponding to the air-core coil 3 refers to a portion facing the air-core coil 3 in the radial direction perpendicular to the axial direction.
  • the radial regulating portion 412 faces a part of the air-core coil 3 in the radial direction.
  • the radial regulating portion 412 is preferably formed from the same material as the main body tubular portion 20, and is also preferably formed from the same material as the axial regulating portion 411. Specifically, the radial regulating portion 412 is formed from the same steel plate (particularly electromagnetic steel plate) as the main body tubular portion 20 and the axial regulating portion 411.
  • the radial restriction portion 412 restricts the air-core coil 3 from moving in a radial direction perpendicular to the axis 10.
  • the air-core coil 3 moves radially toward the axis 10 (inside)
  • the side of the air-core coil 3 comes into contact with the radial restriction portion 412, preventing the air-core coil 3 from moving any further.
  • the first end regulating portion 41 is formed integrally with the main body tubular portion 20.
  • the main body tubular portion 20 and the axial regulating portion 411 are formed integrally by welding or the like.
  • the axial regulating portion 411 and the radial regulating portion 412 are formed integrally by welding or the like.
  • the first end restriction portion 41 (end restriction portion 40) formed on the main body tubular portion 20 has an axial restriction portion 411 and a radial restriction portion 412.
  • the axial restriction portion 411 restricts movement of the outer circumferential surface 31 of the air-core coil 3.
  • the radial restriction portion 412 restricts movement of the air-core coil 3 in the radial direction. This makes it difficult for the air-core coil 3 to be positioned at least outside the main body tubular portion 20 in the axial direction, making it easier to position the air-core coil 3 at a predetermined attachment position of the yoke portion 2.
  • the axial direction restricting portion 411 and the radial direction restricting portion 412 are formed from electromagnetic steel sheets (magnetic material). Therefore, in the magnetic circuit formed by the magnetic flux as shown by the arrow in FIG. 2A, not only the main body tube portion 20 as a back yoke, but also the axial direction restricting portion 411 and the radial direction restricting portion 412 function as a yoke, increasing the inductance.
  • the air-core coil 3 is inserted and positioned between the main body tube portion 20 and the radial direction restricting portion 412, and with the core jig inserted inside the yoke portion 2, the air-core coil 3 is attached to the yoke portion 2 by casting. This also attaches (fixes) the air-core coil 3 to the yoke portion 2, making it easy to attach the air-core coil 3 to the specified attachment position of the yoke portion 2.
  • Fig. 3 is a cross-sectional view of the stator 11 according to the second embodiment, taken along a line passing through the axis 10. Note that the coreless motor 1 and stator 11 according to the second embodiment are largely the same as the coreless motor 1 and stator 11 according to the first embodiment, and therefore the same reference numerals are used, and a description of the overlapping points will be omitted, with the main differences being described.
  • the main body tube portion 20 has an end regulating portion 40 (first end regulating portion 41) only at a first end in the axial direction of the main body tube portion 20, and does not have an end regulating portion 40 at a second end.
  • the main body tube portion 20 has end regulating portions 40 at both ends in the axial direction.
  • the circumferential regulating portions 43 are rib pieces that protrude axially toward the second end side (upper side in FIG. 5A) of the main body tube portion 20, spaced apart in the circumferential direction of the axial regulating portion 411, over the entire radial length of the axial regulating portion 411.
  • the circumferential regulating portion 43 is formed at the boundary portion of the location where the air-core coils 3 are arranged. In other words, the circumferential regulating portion 43 is formed at a bisecting position between the centers of two adjacent air-core coils 3, among the multiple air-core coils 3 arranged at predetermined positions, in the circumferential direction of the axial regulating portion 411.
  • the circumferential regulating portion 43 is formed from the same steel plate (particularly electromagnetic steel plate) as the main body tube portion 20, the axial regulating portion 411, and the radial regulating portion 412.
  • the coreless motor 1 and the stator 11 according to the seventh embodiment are largely the same as the coreless motor 1 and the stator 11 according to the first embodiment, and therefore the same reference numerals are used, a description of the overlapping points will be omitted, and mainly the differences will be described.
  • the main body tube portion 20 is configured with a plurality of assembly pieces 201 that are attached to the middle portion regulating portion 44 and are arranged in the circumferential direction of the axis 10. Adjacent assembly pieces 201 are connected to each other or integrated with weld marks between them.
  • each assembly piece 201 has a middle regulating portion 44 (a first middle regulating portion 45 and a second middle regulating portion 46).
  • the coreless motor 1 and the stator 11 according to the eighth embodiment are largely the same as the coreless motor 1 and the stator 11 according to the sixth embodiment, and therefore the same reference numerals are used, and explanations of overlapping points will be omitted, with the main differences being explained.
  • a groove 22 for holding a lead wire connected to the air-core coil 3 is formed at the axial end of the main body tube portion 20.
  • the coreless motor 1 and stator 11 of the eighth embodiment are the coreless motor 1 and stator 11 of the sixth embodiment (see FIG. 7) with the groove 22 of the fifth embodiment (see FIG. 6A to FIG. 6C) formed.
  • the lead wires can be passed through the inside and outside of the main body tube portion 20.
  • the grooves 22 are formed at the ends of the main body tube portion 20 in the axial direction, the grooves 22 can be easily formed.
  • Fig. 10 is a cross-sectional view of a section passing through the axis 10 of the stator 11 according to the ninth embodiment.
  • the coreless motor 1 and the stator 11 according to the ninth embodiment are largely the same as the coreless motor 1 and the stator 11 according to the first embodiment, so the same reference numerals are used, and a description of the overlapping points will be omitted, with the main differences being described.
  • the yoke portion 2 has an end portion 40 and a middle portion 44 as the movement restriction portion 4.
  • a first end regulating portion 41 is formed as the end regulating portion 40.
  • the first end regulating portion 41 is formed at the end in the axial direction of the main body tubular portion 20.
  • the middle regulating portion 44 is formed in the middle portion in the axial direction of the main body tubular portion 20.
  • a first middle regulating portion 45 and a second middle regulating portion 46 are formed as the middle regulating portion 44.
  • the coreless motor 1 and stator 11 of the ninth embodiment are obtained by forming the middle regulating portion 44 of the sixth embodiment (see FIG. 7) on the coreless motor 1 and stator 11 of the first embodiment (see FIG. 2A).
  • Fig. 11 is a cross-sectional view of a section passing through the axis 10 of the stator 11 according to the tenth embodiment.
  • the coreless motor 1 and stator 11 according to the tenth embodiment are largely the same as the coreless motor 1 and stator 11 according to the second embodiment, so the same reference numerals are used, and a description of the overlapping points will be omitted, with the main differences being described.
  • the yoke portion 2 has an end portion 40 and a middle portion 44 as the movement restriction portion 4.
  • the end regulating portion 40 is formed as a first end regulating portion 41 and a second end regulating portion 42.
  • the middle regulating portion 44 is formed as a first middle regulating portion 45 and a second middle regulating portion 46. That is, the coreless motor 1 and stator 11 according to the tenth embodiment are obtained by adding the middle regulating portion 44 (see FIG. 7) of the sixth embodiment to the coreless motor 1 and stator 11 (see FIG. 3) according to the second embodiment.
  • the coreless motor 1 is not limited to a three-phase AC motor.
  • the rotor 12 is not limited to the rotor 12 in the above-described embodiment.
  • the number of air-core coils 3 provided in the stator 11 is not limited.
  • the air-core coils 3 do not have a core (core) with a magnetic material inside.
  • the air-core coils 3 have a space with no object inside, or have an object made of a non-magnetic material. It is acceptable for some magnetic material to be located inside the air-core coils 3.
  • the main body tube portion 20 does not have to be annular when viewed in the axial direction.
  • the main body tube portion 20 does not have to be formed by stacking multiple steel plates in the axial direction.
  • the material of the axial direction restricting portion 411 is not limited.
  • the axial direction restricting portion 411 does not have to be made of the same material as the main body tube portion 20, but it is preferable that it be made of a magnetic material.
  • the axial regulating portion 411 does not have to be formed over the entire circumferential length of the end portion in the axial direction of the main body tubular portion 20.
  • the axial regulating portion 411 may be formed partially in the circumferential direction of the end portion in the axial direction of the main body tubular portion 20.
  • the axial regulating portion 411 only needs to be formed in at least the portion of the main body tubular portion 20 that corresponds to the air-core coils 3. In this case, the same number of axial regulating portions 411 as the number of air-core coils 3 are formed. Note that the number of air-core coils 3 provided in the main body tubular portion 20 is not limited.
  • the material of the radial regulating portion 412 is not limited.
  • the radial regulating portion 412 does not have to be made of the same material as the main body tube portion 20, and does not have to be made of the same material as the axial regulating portion 411, but it is preferable that the radial regulating portion 412 is made of a magnetic material.
  • the radial regulating portion 412 does not have to be formed over the entire circumferential length of the main body tubular portion 20, and does not have to be formed over the entire circumferential length of the axial regulating portion 411.
  • the radial regulating portion 412 may be formed partially in the circumferential length of the main body tubular portion 20. It is sufficient that the radial regulating portion 412 is formed at least in a portion of the main body tubular portion 20 that corresponds to the air-core coil 3. It is preferable that the radial regulating portion 412 is formed in the same position as the axial regulating portion 411 in the circumferential length of the main body tubular portion 20.
  • the first end restriction portion 41 and the main body tube portion 20 do not have to be formed integrally.
  • the material of the second end restriction portion 42 does not have to be the same as the material of the first end restriction portion 41, but it is preferable that it is the same as the material of the first end restriction portion 41.
  • the axial length of the circumferential regulating portion 43 is not particularly limited.
  • the axial length of the circumferential regulating portion 43 can be fully functional as long as it is at least half the length of the portion corresponding to the air-core coil 3 in the axial direction.
  • the material of the circumferential regulating portion 43 is not limited.
  • the circumferential regulating portion 43 does not have to be made of the same material as the main body tube portion 20, the axial regulating portion 411, or the radial regulating portion 412, but is preferably made of a magnetic material.
  • the material of the middle regulating portion 44 (first middle regulating portion 45 and second middle regulating portion 46) is not limited.
  • the middle regulating portion 44 does not have to be made of the same material as the main body tube portion 20, but it is preferable that it is made of a magnetic material.
  • the middle restriction portion 44 and the main body tube portion 20 do not have to be formed integrally.
  • the stator (11) of the first aspect includes a yoke portion (2) and a plurality of air-core coils (3).
  • the yoke portion (2) is annular around the axial center (10) of the rotor (12).
  • the air-core coils (3) are disposed inside the yoke portion (2).
  • the yoke portion (2) includes a main body tubular portion (20) and a movement restricting portion (4).
  • the main body tubular portion (20) includes the air-core coils (3) disposed along the inner peripheral surface (21) to form a back yoke.
  • the movement restricting portion (4) protrudes toward the axial center (10) from the main body tubular portion (20).
  • the movement restricting portion (4) includes axial restricting portions (411, 421, 451, 461) and radial restricting portions (412, 422, 452, 462).
  • the axial direction restricting portions (411, 421, 451, 461) restrict the air-core coil (3) from moving in the axial direction along which the axis (10) extends.
  • the radial direction restricting portions (412, 422, 452, 462) restrict the air-core coil (3) from moving in the radial direction perpendicular to the axis (10).
  • the axial direction restricting portion (411, 421, 451, 461) restricts the axial movement of the air-core coil (3)
  • the radial direction restricting portion (412, 422, 452, 462) restricts the radial movement of the air-core coil (3). This makes it easier to position or attach the air-core coil (3) to a predetermined attachment position of the yoke portion (2).
  • the second aspect can be realized by combining it with the first aspect.
  • the yoke portion (2) has an end portion (40) formed at the end portion in the axial direction of the main body tube portion (20) as the movement restriction portion (4).
  • the end portion (40) has an axial restriction portion (411, 421) that restricts the movement of the outer circumferential surface (31) of the air-core coil (3).
  • the second aspect it becomes easier to position or attach the yoke portion (2) of the air-core coil (3) to a specified mounting position.
  • the yoke portion (2) has a first end regulating portion (41) and a second end regulating portion (42) as the end regulating portion (40).
  • the first end regulating portion (41) is formed at a first end in the axial direction of the main body tubular portion (20).
  • the second end regulating portion (42) is formed at a second end in the axial direction of the main body tubular portion (20).
  • the third aspect makes it easier to more firmly position and attach (fix) the air-core coil (3) to the yoke portion (2).
  • the fourth aspect can be realized by combining with the second or third aspect.
  • the radial restriction portion (412) is arranged over at least the entire length of the portion corresponding to the air-core coil (3) in the axial direction.
  • the fourth aspect makes it easier to more firmly position and attach (fix) the air-core coil (3) to the yoke portion (2).
  • the circumferential movement of the air-core coil (3) is restricted.
  • the sixth aspect can be realized by combining with any of the second, fourth, or fifth aspects.
  • the main body tubular portion (20) has a non-movement-restricted end portion that does not have an end restriction portion (40) at one of both ends in the axial direction of the main body tubular portion (20).
  • a groove portion (22) that holds a lead wire connected to the air-core coil (3) is formed at the non-movement-restricted end portion.
  • the lead wire can be passed through the inside and outside of the main body tube portion (20).
  • the groove portion (22) is formed at the end portion in the axial direction of the main body tube portion (20), so the groove portion (22) can be easily formed.
  • the seventh aspect it is easier to more firmly position and attach (fix) the air-core coil (3) to the yoke portion (2).
  • the air-core coil (3) can be attached to the middle regulating portion (44) of the assembly piece (201) before it is assembled to the main body tubular portion (20), making it easy to attach the air-core coil (3) to the main body tubular portion (20).
  • the ninth aspect can be realized by combining it with the seventh or eighth aspect.
  • a groove portion (22) for holding a lead wire connected to the air-core coil (3) is formed at the axial end of the main body tube portion (20).
  • the yoke portion (2) has an end portion regulating portion (40) and a middle portion regulating portion (44) as the movement regulating portion (4).
  • the end portion regulating portion (40) is formed at the end portion in the axial direction of the main body tubular portion (20).
  • the middle portion regulating portion (44) is formed at the middle portion in the axial direction of the main body tubular portion (20).
  • the air-core coil (3) it is easier to more firmly position and attach (fix) the air-core coil (3) to the yoke portion (2).
  • the eleventh aspect can be realized by combining it with any one of the first to tenth aspects.
  • the coreless motor (1) includes a stator (11) of any one of the first to tenth aspects and a rotor (12).
  • the eleventh aspect it becomes easier to position or attach the air-core coil (3) to a specified mounting position on the yoke portion (2) of the coreless motor (1).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Un stator (11) comprend une partie culasse (2) et une pluralité de bobines à noyau d'air (3). La partie culasse (2) présente une forme annulaire autour du centre axial (10) d'un rotor. Les bobines à noyau d'air (3) sont disposées à l'intérieur de la partie culasse (2). La partie culasse (2) possède une partie cylindrique de corps (20) et une partie de limitation de mouvement (4). La partie cylindrique de corps (20) comporte les bobines à noyau d'air (3) disposées le long de sa surface périphérique interne (21) et constitue une culasse arrière. La partie de limitation de mouvement (4) fait saillie à partir de la partie cylindrique de corps (20) vers le côté centre axial (10). La partie de limitation de mouvement (4) possède une partie de limitation de sens axial (411) et une partie de limitation de sens radial (412). La partie de limitation de sens axial (411) limite le déplacement de la bobine à noyau d'air (3) dans le sens axial dans lequel s'étend le centre axial (10). La partie de limitation de sens radial (412) limite le déplacement des bobines à noyau d'air (3) dans le sens radial perpendiculaire au centre axial (10).
PCT/JP2024/017350 2023-06-09 2024-05-10 Stator et moteur sans fer Pending WO2024252844A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-095856 2023-06-09
JP2023095856 2023-06-09

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WO2024252844A1 true WO2024252844A1 (fr) 2024-12-12

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0410553U (fr) * 1990-05-14 1992-01-29
JPH06141500A (ja) * 1992-10-23 1994-05-20 Japan Servo Co Ltd コアレスモータ
JPH09233738A (ja) * 1996-02-20 1997-09-05 Toshiba Corp 回転電機
JP2002159152A (ja) * 2000-11-17 2002-05-31 Yaskawa Electric Corp 永久磁石形電動機の固定子
JP2007135392A (ja) * 2005-10-13 2007-05-31 Yaskawa Electric Corp スロットレスモータ
JP2009100489A (ja) * 2007-10-12 2009-05-07 Mitsubishi Electric Corp スロットレス形回転電機
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JP2011024365A (ja) * 2009-07-17 2011-02-03 Yaskawa Electric Corp スロットレスモータ
JP2011024324A (ja) * 2009-07-15 2011-02-03 Mitsubishi Electric Corp 永久磁石式同期モータ
JP2020068562A (ja) * 2018-10-23 2020-04-30 日立グローバルライフソリューションズ株式会社 電動機及びそれを用いた電動送風機、電気掃除機
JP2022038053A (ja) * 2020-08-26 2022-03-10 日立グローバルライフソリューションズ株式会社 電気掃除機
WO2023032642A1 (fr) * 2021-09-03 2023-03-09 株式会社デンソー Machine dynamo-électrique

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JPH0410553U (fr) * 1990-05-14 1992-01-29
JPH06141500A (ja) * 1992-10-23 1994-05-20 Japan Servo Co Ltd コアレスモータ
JPH09233738A (ja) * 1996-02-20 1997-09-05 Toshiba Corp 回転電機
JP2002159152A (ja) * 2000-11-17 2002-05-31 Yaskawa Electric Corp 永久磁石形電動機の固定子
JP2007135392A (ja) * 2005-10-13 2007-05-31 Yaskawa Electric Corp スロットレスモータ
JP2009100489A (ja) * 2007-10-12 2009-05-07 Mitsubishi Electric Corp スロットレス形回転電機
JP2010063281A (ja) * 2008-09-04 2010-03-18 Mitsubishi Electric Corp 永久磁石式同期モータ
JP2011024324A (ja) * 2009-07-15 2011-02-03 Mitsubishi Electric Corp 永久磁石式同期モータ
JP2011024365A (ja) * 2009-07-17 2011-02-03 Yaskawa Electric Corp スロットレスモータ
JP2020068562A (ja) * 2018-10-23 2020-04-30 日立グローバルライフソリューションズ株式会社 電動機及びそれを用いた電動送風機、電気掃除機
JP2022038053A (ja) * 2020-08-26 2022-03-10 日立グローバルライフソリューションズ株式会社 電気掃除機
WO2023032642A1 (fr) * 2021-09-03 2023-03-09 株式会社デンソー Machine dynamo-électrique

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