WO2023085216A1 - Rotor, moteur, compresseur, et dispositif climatiseur - Google Patents

Rotor, moteur, compresseur, et dispositif climatiseur Download PDF

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Publication number
WO2023085216A1
WO2023085216A1 PCT/JP2022/041291 JP2022041291W WO2023085216A1 WO 2023085216 A1 WO2023085216 A1 WO 2023085216A1 JP 2022041291 W JP2022041291 W JP 2022041291W WO 2023085216 A1 WO2023085216 A1 WO 2023085216A1
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WO
WIPO (PCT)
Prior art keywords
magnet
rotor
rotation axis
thickness
viewed along
Prior art date
Application number
PCT/JP2022/041291
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English (en)
Japanese (ja)
Inventor
義博 片岡
達也 小川
清隆 西嶋
Original Assignee
ダイキン工業株式会社
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Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2023085216A1 publication Critical patent/WO2023085216A1/fr

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Classifications

    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Definitions

  • Patent Document 1 Japanese Patent Application Laid-Open No. 2016-171646 describes a motor rotor in which a plurality of permanent magnets are embedded. When viewed along the axis of rotation of the rotor, each permanent magnet consists of two flat magnets extending outward from the inside of the rotor and one curved magnet connecting the inner ends of the two flat magnets. Consists of Japanese Patent Application Laid-Open No. 2016-171646
  • the curved magnets are farther from the outer peripheral surface of the rotor than the flat plate magnets, so they are demagnetized by the magnetic field generated by the stator of the motor. hard to do. Therefore, the demagnetization resistance of the curved magnet may become excessive.
  • the stress on the inner diameter of the rotor core increases when the shaft is shrink-fitted to the rotor. Also, the thermal stress applied to the curved magnet during shrink fitting may increase.
  • the rotor of the first aspect is a rotor of a motor that is rotatable around a rotation axis.
  • the rotor includes a first magnet, a second magnet and a third magnet.
  • the first magnet and the second magnet extend from the inner side to the outer side of the rotor when viewed along the rotation axis, and have a flat plate shape.
  • the third magnet is disposed between the inner end of the first magnet and the inner end of the second magnet, and has a shape convex inward when viewed along the rotation axis. have. When viewed along the rotation axis, the thickness of the central portion of the third magnet in the circumferential direction of the rotor is smaller than the thickness of the first and second magnets.
  • this rotor it is possible to reduce costs by reducing the amount of magnets used.
  • the stress on the inner diameter of the rotor due to the shrink fitting of the shaft to the rotor can be reduced.
  • the thermal stress applied to the third magnet can be reduced.
  • the rotor of the second aspect is the rotor of the first aspect, and when viewed along the rotation axis, the thickness of both ends of the third magnet in the circumferential direction is equal to the thickness of the first magnet and the second magnet. is equal to
  • this rotor it is possible to reduce costs by reducing the amount of magnets used.
  • the stress on the inner diameter of the rotor due to the shrink fitting of the shaft to the rotor can be reduced.
  • the thermal stress applied to the third magnet can be reduced.
  • the rotor of the third aspect is the rotor of the first aspect or the second aspect, and when viewed along the rotation axis, the thickness of the third magnet is such that the thickness of the third magnet increases from both ends toward the center in the circumferential direction. gradually become smaller.
  • this rotor it is possible to reduce costs by reducing the amount of magnets used.
  • the stress on the inner diameter of the rotor due to the shrink fitting of the shaft to the rotor can be reduced.
  • the thermal stress applied to the third magnet can be reduced.
  • the rotor of the fourth aspect is the rotor of any one of the first to third aspects, and when viewed along the rotation axis, the inner edge and the outer edge of the third magnet are circular arcs. be.
  • the center of the arc that is the inner edge of the third magnet is located outside the center of the arc that is the outer edge of the third magnet.
  • this rotor it is possible to reduce costs by reducing the amount of magnets used.
  • the stress on the inner diameter of the rotor due to the shrink fitting of the shaft to the rotor can be reduced.
  • the thermal stress applied to the third magnet can be reduced.
  • the rotor of the fifth aspect is the rotor of any one of the first to fourth aspects, and the first, second and third magnets are ferrite magnets.
  • a motor according to the sixth aspect includes a stator and a rotor according to any one of the first to fifth aspects.
  • the compressor of the seventh aspect includes the motor of the sixth aspect.
  • the air conditioner of the eighth aspect includes the compressor of the seventh aspect.
  • FIG. 3 is a plan view of rotor 10 with end plate 30 and fastener 50 removed.
  • FIG. 3 is a plan view of an end plate 30 of the rotor 10;
  • FIG. FIG. 2 is a cross-sectional view taken along line IV-IV of FIG. 1;
  • 4 is a plan view of the permanent magnets 40 housed in the magnet housing holes 22 as viewed along the rotation axis C.
  • FIG. 4 is an external view of a first magnet 41 and a second magnet 42;
  • FIG. 4 is an external view of a third magnet 43;
  • FIG. 2 is a cross-sectional view of motor 100.
  • FIG. 2 is a longitudinal sectional view of compressor 200.
  • FIG. 4 is a cross-sectional view of a permanent magnet 140 housed in a magnet housing hole 22 as a comparative example
  • FIG. 11 is a cross-sectional view of a permanent magnet 40 housed in a magnet housing hole 22 in a first modified example
  • FIG. 11 is a cross-sectional view of a permanent magnet 40 housed in a magnet housing hole 22 in a second modified example
  • a rotor, a motor including the rotor, and a compressor including the motor according to an embodiment of the present disclosure will be described with reference to the drawings.
  • the rotor 10 mainly has a rotor core 20, end plates 30, permanent magnets 40, and fasteners 50.
  • a shaft through-hole 11 for attaching a shaft 60 is formed in the rotor 10 .
  • Rotor core 20 is formed by laminating a plurality of steel plates.
  • Rotor core 20 has a cylindrical shape.
  • the rotor core 20 has a rotation axis C passing through the centers of the two circular surfaces of its cylindrical shape.
  • the rotor core 20 is mainly formed with one shaft housing hole 21 , a plurality of magnet housing holes 22 and a plurality of fastener housing holes 23 .
  • a shaft receiving hole 21 , a magnet receiving hole 22 , and a fastener receiving hole 23 pass through the rotor core 20 along the rotation axis C. As shown in FIG.
  • the shaft housing hole 21 is a hole through which the shaft 60 passes and for holding the shaft 60 .
  • the shaft receiving hole 21 When viewed along the rotation axis C, the shaft receiving hole 21 has a circular shape. The circular center of the shaft receiving hole 21 is on the rotation axis C. As shown in FIG.
  • the magnet housing hole 22 is a hole for housing the permanent magnet 40 and holding the permanent magnet 40 .
  • the magnet housing hole 22 has a substantially U shape.
  • the magnet housing holes 22 have a shape that protrudes toward the inside of the rotor 10 .
  • the rotor core 20 has six magnet receiving holes 22 .
  • the six magnet housing holes 22 are arranged at six-fold symmetrical positions about the rotation axis C.
  • two adjacent magnet housing holes 22 are separated from each other by 60° along the circumferential direction of the rotor 10 .
  • the magnet housing hole 22 has a shape symmetrical with respect to line IV-IV shown in FIG.
  • the fastener housing hole 23 is a hole for housing the fastener 50 and holding the fastener 50 .
  • the fastener receiving hole 23 has a circular shape.
  • the rotor core 20 has six fastener receiving holes 23 .
  • the six fastener receiving holes 23 are arranged at six-fold symmetry around the rotation axis C.
  • two adjacent fastener receiving holes 23 are separated by 60° along the circumferential direction of the rotor 10 .
  • the fastener receiving holes 23 are positioned outside the rotor 10 relative to the magnet receiving holes 22 on line IV-IV shown in FIG.
  • End plate 30 is a member that prevents the permanent magnet 40 from coming off the magnet housing hole 22 . As shown in FIG. 4, one end plate 30 is attached to each of the upper surface 25 and the lower surface 26 of the rotor core 20 .
  • the end plate 30 is made of a non-magnetic material such as stainless steel or aluminum.
  • the end plate 30 has a disk shape. End plate 30 is formed with a shaft opening 31 and a plurality of fastener openings 33 .
  • the shaft opening 31 is a hole through which the shaft 60 passes. When viewed along the axis of rotation C, the shaft opening 31 has a circular shape. The circular center of the shaft opening 31 is on the rotation axis C. As shown in FIG. When the end plate 30 is attached to the rotor core 20 and viewed along the rotation axis C, the shaft opening 31 overlaps the shaft receiving hole 21 . The outer diameter of the shaft opening 31 is larger than the outer diameter of the shaft receiving hole 21 .
  • the shaft through hole 11 is composed of a shaft receiving hole 21 and a shaft opening 31 .
  • the fastener opening 33 is a hole through which the fastener 50 passes. When viewed along axis of rotation C, fastener opening 33 has a circular shape. With the end plate 30 attached to the rotor core 20 , the fastener opening 33 overlaps the fastener receiving hole 23 when viewed along the rotation axis C. As shown in FIG. The outer diameter of the fastener opening 33 is smaller than the outer diameter of the fastener receiving hole 23 .
  • both ends of the magnet housing hole 22 in the direction of the rotation axis C are closed by end plates 30, respectively. This prevents the permanent magnets 40 housed in the magnet housing holes 22 from coming off the magnet housing holes 22 .
  • the permanent magnets 40 magnetize the rotor core 20 .
  • the permanent magnet 40 is composed of a first magnet 41 , a second magnet 42 and a third magnet 43 .
  • the first magnet 41, the second magnet 42 and the third magnet 43 are ferrite magnets.
  • the first magnet 41, the second magnet 42 and the third magnet 43 may be bond magnets.
  • each magnet accommodation hole 22 accommodates one first magnet 41, one second magnet 42, and one third magnet 43.
  • An arrow M shown in FIG. 5 represents the magnetization direction of the permanent magnet 40 .
  • the first magnet 41 and the second magnet 42 have a substantially flat plate shape as shown in FIG. Corners of the first magnet 41 and the second magnet 42 are chamfered. When viewed along the rotation axis C, the first magnets 41 and the second magnets 42 are arranged to extend from the inside to the outside of the rotor 10 .
  • FIG. 6 shows the dimension L1 in the direction along the rotation axis C, the dimension L2 in the direction from the inside to the outside of the rotor 10, and the dimension in the circumferential direction of the rotor 10 for the first magnet 41 and the second magnet 42.
  • L3 is shown. As shown in FIG. 4, the dimension L1 is equal to or slightly shorter than the dimension of the magnet housing hole 22 in the direction of the rotation axis C. As shown in FIG.
  • Dimension L2 is between 20% and 80% of the distance R between the outer and inner surfaces of rotor core 20 (FIG. 2).
  • Dimension L3 is between 10% and 100% of dimension L2.
  • Dimension L3 is constant in the direction from the inside to the outside of rotor 10 except for the chamfered corners of first magnet 41 and second magnet 42 .
  • the third magnet 43 has a curved shape when viewed along the rotation axis C, as shown in FIG. The corners of the third magnet 43 are chamfered.
  • the third magnet 43 is arranged between the first end 41 a of the first magnet 41 inside the rotor 10 and the second end 42 a of the second magnet 42 inside the rotor 10 .
  • the third magnet 43 has a third end 43 a that contacts the first end 41 a of the first magnet 41 and a fourth end 43 b that contacts the second end 42 a of the second magnet 42 .
  • FIG. 7 shows the dimension L4 in the direction along the rotation axis C with respect to the third magnet 43. As shown in FIG. Dimension L4 is the same as dimension L1.
  • the third magnet 43 When viewed along the rotation axis C, the third magnet 43 has a shape that protrudes toward the inside of the rotor 10 . As shown in FIG. 5, when viewed along the rotation axis C, an inner edge 43c, which is the edge of the third magnet 43 inside the rotor 10, and an edge of the third magnet 43 outside the rotor 10 The outer edge 43d has an arc shape.
  • the thickness T3 of the first magnet 41 and the second magnet 42 when viewed along the rotation axis C is the dimension L3
  • the thickness of the third magnet 43 is the distance between the inner edge 43c and the outer edge 43d.
  • the thickness T2 of the third end portion 43a and the fourth end portion 43b which are both ends of the third magnet 43 in the circumferential direction of the rotor 10, is equal to that of the first magnet 41 and It is equal to the thickness T3 of the second magnet 42 .
  • the thickness of the third magnet 43 gradually decreases from the third end portion 43a and the fourth end portion 43b toward the central portion 43e.
  • the thickness T1 of the central portion 43e of the third magnet 43 is smaller than the thickness T2 of the third end portion 43a and the fourth end portion 43b of the third magnet 43 by 3% to 50%.
  • the shape of the third magnet 43 is not particularly limited as long as it satisfies the above conditions.
  • the center P1 of the arc of the inner edge 43c is closer to the rotor 10 than the center P2 of the arc of the outer edge 43d. It may have a shape that is closer to the outside.
  • the rotor 10 of this embodiment is a six-pole rotor in which permanent magnets 40 are held in each of the six magnet housing holes 22 .
  • the number of poles of rotor 10 is not limited to six.
  • the number of poles of the rotor 10 may be 4 poles, 8 poles or 10 poles.
  • the rotor core 20 has the same number of magnet accommodation holes 22 as the number of poles of the rotor 10 .
  • Fastener 50 fix the rotor core 20 and the two end plates 30 to each other.
  • Fasteners 50 are, for example, rivets, bolts, and nuts.
  • the fasteners 50 fasten the fastener openings 33 of the end plate 30 on the upper surface 25 side of the rotor core 20 , the fastener receiving holes 23 of the rotor core 20 , and the end plate 30 on the lower surface 26 side of the rotor core 20 . is positioned to pass through the tool opening 33 .
  • the rotor core 20 and the two end plates 30 are fixed to each other by a method such as crimping the lower ends of the fasteners 50 .
  • motor 100 mainly has rotor 10 and stator 70 .
  • the rotor 10 is rotatably provided around the rotation axis C.
  • a cylindrical shaft 60 is fixed to the shaft through-hole 11 of the rotor 10 by shrink fitting.
  • the stator 70 is arranged outside the rotor 10 so as to surround the rotor 10 .
  • a gap is formed between the rotor 10 and the stator 70 .
  • the stator 70 mainly has a stator core 71 and coils 72 .
  • the stator core 71 is made of a ferromagnetic material such as an electromagnetic steel plate, for example.
  • the stator core 71 has a back yoke 71a and a plurality of teeth 71b.
  • the back yoke 71a has a substantially cylindrical shape.
  • the teeth 71b protrude in the radial direction of the back yoke 71a from the inner peripheral surface of the back yoke 71a.
  • nine teeth 71b are arranged at regular intervals in the circumferential direction of the back yoke 71a.
  • the coil 72 is formed, for example, by winding a wire around each tooth 71b.
  • a space in which the winding of the coil 72 is accommodated is formed between two teeth 71b adjacent in the circumferential direction.
  • An insulating member such as an insulating film is arranged between the teeth 71 b and the coil 72 .
  • the stator core 71 has nine coils 72 .
  • the number of coils 72 is not particularly limited.
  • the coils 72 of the stator 70 are selectively energized sequentially according to a predetermined sequence, causing the rotor 10 to rotate about the rotation axis C together with the shaft 60 .
  • a refrigeration system is, for example, an air conditioner capable of cooling and heating a room such as a building by performing a vapor compression refrigeration cycle.
  • the air conditioner includes, for example, a refrigerant circuit in which the compressor 200 of the present embodiment, a four-way switching valve, an outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger are connected.
  • the compressor 200, the four-way switching valve, the outdoor heat exchanger, and the expansion mechanism are mounted on the outdoor unit of the air conditioner, and the indoor heat exchanger is mounted on the indoor unit of the air conditioner.
  • the four-way switching valve switches between a refrigerant circuit during cooling operation and a refrigerant circuit during heating operation.
  • Compressor 200 compresses refrigerant circulating in a refrigerant circuit of a refrigeration system such as an air conditioner.
  • Compressor 200 is, for example, a rotary compressor or a scroll compressor.
  • the compressor 200 mainly includes a casing 210, a compression mechanism 215, a motor 100, a shaft 60, a suction pipe 219 and a discharge pipe 220.
  • Casing 210 is a closed container that accommodates compression mechanism 215 , motor 100 and shaft 60 .
  • Suction pipe 219 and discharge pipe 220 pass through casing 210 and are airtightly connected to casing 210 .
  • the compression mechanism 215 compresses low-pressure refrigerant supplied from an external refrigerant circuit through a suction pipe 219 .
  • the refrigerant compressed by the compression mechanism 215 is discharged into the high-pressure space S1 inside the casing 210 and supplied to the external refrigerant circuit through the discharge pipe 220 .
  • a compression chamber 215 a is formed inside the compression mechanism 215 .
  • Compression mechanism 215 is coupled to shaft 60 .
  • Compression mechanism 215 compresses the refrigerant by increasing or decreasing the volume of compression chamber 215 a using power supplied by rotating shaft 60 .
  • the motor 100 is arranged above or below the compression mechanism 215 .
  • a stator 70 of motor 100 is fixed to the inner wall surface of casing 210 .
  • Rotor 10 of motor 100 is rotatably arranged inside stator 70 .
  • the shaft 60 is arranged so that its axial direction is along the vertical direction.
  • Shaft 60 is connected to rotor 10 of motor 100 and a member forming compression chamber 215 a of compression mechanism 215 .
  • the shaft 60 rotates and the refrigerant is compressed by the compression mechanism 215 .
  • FIG. 10 is a cross-sectional view similar to FIG. 5, showing the permanent magnets 140 that are housed in the magnet housing holes 22 of the rotor 10 and have a substantially U-shape.
  • Permanent magnet 140 is composed of two flat magnets 141 and one curved magnet 142 .
  • the flat magnets 141 extend from the outside of the rotor 10 toward the inside.
  • Curved magnet 142 has a shape that protrudes toward the inside of rotor 10 . Both ends of the curved magnet 142 are in contact with the inner ends of the plate-like magnets 141 .
  • the outer ends of the planar magnets 141 are located near the outer surface of the rotor 10, as shown in FIG.
  • the thickness T12 of the curved magnet 142 is constant between both ends of the curved magnet 142 and equal to the thickness T11 of the planar magnet 141 .
  • the thickness of the permanent magnet 140 is constant in the longitudinal direction. Thicknesses T11 and T12 of the permanent magnet 140 are set large in order to reduce the influence of demagnetization due to the magnetic field generated from the coil 72 and improve the demagnetization resistance.
  • the thickness of the permanent magnet 40 when viewed along the rotation axis C, the thickness of the permanent magnet 40 is not constant in the longitudinal direction. Specifically, as shown in FIG. 5, the thickness T1 of the central portion 43e of the third magnet 43 is smaller than the thickness T2 of the third end portion 43a and the fourth end portion 43b of the third magnet 43, and It is smaller than the thickness T3 of the first magnet 41 and the second magnet 42 . Since the central portion 43 e of the third magnet 43 is the portion of the permanent magnet 40 that is farthest from the outer surface of the rotor 10 , the central portion 43 e of the third magnet 43 is attenuated by the magnetic field generated by the coil 72 . This is a location that is not easily affected by magnetism.
  • the demagnetization resistance tends to be excessive especially in the central portion 142a of the curved magnet 142.
  • the thickness T1 of the central portion 43e of the third magnet 43 is smaller than the thickness T3 of the first magnet 41 and the second magnet 42.
  • the center of the arc of the inner edge 43c is brought closer to the outside of the rotor 10, so that the inner surface of the rotor 10 and the third magnet 43
  • the distance to the central portion 43e can be increased.
  • the stress on the inner diameter portion of the rotor 10 (rotor core 20) due to the shrink fitting of the shaft 60 to the rotor 10 can be reduced.
  • the heat transferred to the third magnets 43 when the inner diameter portion of the rotor 10 is heated and the shaft 60 is shrink-fitted can be reduced, and the thermal stress applied to the third magnets 43 can be reduced.
  • the inner diameter portion of the rotor 10 is a portion inside the third magnet 43 when viewed along the rotation axis C. As shown in FIG.
  • the thickness of the permanent magnet 40 is discontinuous at the contact portion between the first magnet 41 and the third magnet 43 and at the contact portion between the second magnet 42 and the third magnet 43.
  • change to The thickness T1 of the third magnet 43 is 5% to 25% smaller than the thickness T3 of the first magnet 41 and the second magnet .
  • the thickness T1 of the central portion 43e of the third magnet 43 may be smaller than the thickness T2 of the third end portion 43a and the fourth end portion 43b of the third magnet 43.
  • the thickness of the third magnet 43 may gradually decrease from the third end 43a and the fourth end 43b toward the central portion 43e.
  • the volume of the permanent magnets 40 can be reduced and the amount of permanent magnets 40 used can be reduced, so the cost of the rotor 10 can be reduced.
  • the inner edge 43c of the third magnet 43 when viewed along the rotation axis C, has an arc shape at the third end 43a and the fourth end 43b. and a second inner edge portion 43c2 having a linear shape at the central portion 43e.
  • the second inner edge portion 43 c 2 when viewed along the rotation axis C, extends along a direction orthogonal to the radial direction of the rotor core 20 .
  • the arc center of the first inner edge portion 43 c 1 may coincide with the arc center of the outer edge 43 d of the third magnet 43 .
  • the third magnet 43 shown in FIG. 12 has a shape obtained by cutting the inside of the curved magnet 142 shown in FIG. ing.
  • the second inner edge portion 43c2 is rotated.
  • it may have a shape other than a rectilinear shape.
  • the second inner edge portion 43c2 may have an arc shape when viewed along the rotation axis C.
  • the volume of the permanent magnets 40 can be reduced and the amount of permanent magnets 40 used can be reduced, so the cost of the rotor 10 can be reduced.
  • the stress on the inner diameter portion of the rotor 10 due to the shrink fitting of the shaft 60 to the rotor 10 can be reduced.
  • the heat transferred to the third magnets 43 when the inner diameter portion of the rotor 10 is heated and the shaft 60 is shrink-fitted can be reduced, and the thermal stress applied to the third magnets 43 can be reduced.
  • the permanent magnet 40 is composed of a first magnet 41, a second magnet 42 and a third magnet 43.
  • the permanent magnet 40 may be composed of one magnet in which the first magnet 41, the second magnet 42 and the third magnet 43 are integrated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention concerne un rotor qui est destiné à un moteur, qui permet de réduire la quantité d'utilisation d'aimants, et qui permet la relaxation des contraintes se produisant lors du frettage d'un arbre. Un rotor (10) est agencé de manière à pouvoir tourner autour de l'axe de rotation (C), et comprend un premier aimant (41), un deuxième aimant (42) et un troisième aimant (43). Dans une vue le long de l'axe de rotation (C), le premier aimant (41) et le deuxième aimant (42) s'étendent du côté interne au côté externe du rotor (10), et ont une forme tabulaire. Le troisième aimant (43) est disposé entre l'extrémité côté interne du premier aimant (41) et l'extrémité côté interne du deuxième aimant (42), et a une forme faisant saillie vers le côté interne dans une vue le long de l'axe de rotation (C). Dans une vue le long de l'axe de rotation (C), l'épaisseur du troisième aimant (43) au niveau de la partie centrale dans la direction circonférentielle du rotor (10) est inférieure à l'épaisseur du premier aimant (41) et du deuxième aimant (42).
PCT/JP2022/041291 2021-11-12 2022-11-07 Rotor, moteur, compresseur, et dispositif climatiseur WO2023085216A1 (fr)

Applications Claiming Priority (2)

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JP2021185191A JP7381914B2 (ja) 2021-11-12 2021-11-12 回転子、モータ、圧縮機および空気調和装置
JP2021-185191 2021-11-12

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JP2014018056A (ja) * 2012-06-14 2014-01-30 Daikin Ind Ltd 埋込磁石型回転電機
WO2014046228A1 (fr) * 2012-09-24 2014-03-27 三菱電機株式会社 Moteur électrique à aimant permanent intégré
JP2015133839A (ja) * 2014-01-14 2015-07-23 株式会社ジェイテクト 磁石埋込型ロータ
JP2016096665A (ja) * 2014-11-14 2016-05-26 株式会社ジェイテクト 回転電機用ロータおよびその製造方法
JP2016171646A (ja) * 2015-03-12 2016-09-23 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 永久磁石式回転電機、並びにそれを用いる圧縮機
JP2018110483A (ja) * 2017-01-04 2018-07-12 日立ジョンソンコントロールズ空調株式会社 永久磁石式回転電機、及び、それを用いた圧縮機

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Publication number Priority date Publication date Assignee Title
CN104685763B (zh) * 2012-09-29 2018-07-03 艾默生电气公司 具有分段磁体构造的转子和相关电机以及压缩机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013247781A (ja) * 2012-05-25 2013-12-09 Jtekt Corp ロータ及びこれを備えた回転電機
JP2014018056A (ja) * 2012-06-14 2014-01-30 Daikin Ind Ltd 埋込磁石型回転電機
WO2014046228A1 (fr) * 2012-09-24 2014-03-27 三菱電機株式会社 Moteur électrique à aimant permanent intégré
JP2015133839A (ja) * 2014-01-14 2015-07-23 株式会社ジェイテクト 磁石埋込型ロータ
JP2016096665A (ja) * 2014-11-14 2016-05-26 株式会社ジェイテクト 回転電機用ロータおよびその製造方法
JP2016171646A (ja) * 2015-03-12 2016-09-23 ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド 永久磁石式回転電機、並びにそれを用いる圧縮機
JP2018110483A (ja) * 2017-01-04 2018-07-12 日立ジョンソンコントロールズ空調株式会社 永久磁石式回転電機、及び、それを用いた圧縮機

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