WO2018138866A1 - Stator, moteur électrique, compresseur et dispositif de réfrigération/climatisation - Google Patents

Stator, moteur électrique, compresseur et dispositif de réfrigération/climatisation Download PDF

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Publication number
WO2018138866A1
WO2018138866A1 PCT/JP2017/002896 JP2017002896W WO2018138866A1 WO 2018138866 A1 WO2018138866 A1 WO 2018138866A1 JP 2017002896 W JP2017002896 W JP 2017002896W WO 2018138866 A1 WO2018138866 A1 WO 2018138866A1
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WIPO (PCT)
Prior art keywords
iron core
yoke
tooth
stator
core
Prior art date
Application number
PCT/JP2017/002896
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English (en)
Japanese (ja)
Inventor
馬場　和彦
Original Assignee
三菱電機株式会社
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.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018564043A priority Critical patent/JP6656429B2/ja
Priority to PCT/JP2017/002896 priority patent/WO2018138866A1/fr
Publication of WO2018138866A1 publication Critical patent/WO2018138866A1/fr

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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
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • 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

Definitions

  • the present invention relates to a stator, an electric motor, a compressor, and a refrigeration air conditioner.
  • a first portion obtained by laminating a thin first magnetic steel sheet is disposed in the axial center portion of the stator, and a thick second magnetic steel sheet is disposed at both axial end portions of the stator.
  • An electric motor in which a stacked second portion is arranged is known (for example, see Patent Document 1).
  • JP 2005-151648 A (see paragraphs 0014 to 0016)
  • the first electromagnetic steel plate constituting the first part is thin and the iron loss is small, a large amount of magnetic flux from the permanent magnet of the rotor flows to the first part, thereby reducing the iron loss.
  • the second electromagnetic steel sheet constituting the second part is thick and has high magnetic permeability, the magnetic flux from the permanent magnet of the rotor easily flows to the second part. Therefore, the effect of reducing iron loss cannot be obtained sufficiently.
  • This invention was made in order to solve said subject, and it aims at providing the stator which can reduce an iron loss more effectively.
  • a stator according to the present invention includes a first iron core having a first yoke extending in the circumferential direction about the axis, and a first tooth extending from the first yoke toward the axis, A second iron core having a second yoke adjacent to one yoke in the axial direction and a second tooth adjacent to the first tooth in the axial direction is provided.
  • the first iron core is composed of a laminate of electromagnetic steel sheets.
  • the second iron core is composed of a laminate of a thin ribbon of amorphous metal or nanocrystalline metal, or a compression molded body of powder of amorphous metal or nanocrystalline metal.
  • the radial width around the axis of the first yoke is Y1
  • the radial width of the second yoke is Y2
  • the circumferential width of the first tooth is T1
  • the circumference of the second tooth is If the width in the direction is T2, at least one of Y1 ⁇ Y2 and T1 ⁇ T2 is established.
  • the stator according to the present invention also includes a first iron core having a first yoke extending in the circumferential direction about the axis, and a first tooth extending from the first yoke toward the axis. And a second iron core having a second yoke adjacent to the first yoke in the axial direction and a second tooth adjacent to the first tooth in the axial direction.
  • the first iron core is composed of a laminated body of first electromagnetic steel sheets.
  • the second iron core is composed of a laminate of second electromagnetic steel sheets that are thinner than the first electromagnetic steel sheet.
  • the radial width around the axis of the first yoke is Y1
  • the radial width of the second yoke is Y2
  • the circumferential width of the first tooth is T1
  • the circumference of the second tooth is If the width in the direction is T2, at least one of Y1 ⁇ Y2 and T1 ⁇ T2 is established.
  • the width Y1 of the first yoke is smaller than the width Y2 of the second yoke (Y1 ⁇ Y2), or the width T1 of the first tooth is smaller than the width T2 of the second tooth (T1). Since ⁇ T2) or both are established, the magnetic flux from the permanent magnet of the rotor tends to flow to the second iron core. Therefore, iron loss can be effectively reduced.
  • FIG. 3 is a cross-sectional view showing the electric motor in the first embodiment.
  • FIG. 3 is a cross-sectional view showing the electric motor in the first embodiment.
  • FIG. 3 is a plan view showing a first iron core in the first embodiment.
  • FIG. 3 is a plan view showing a first divided iron core portion in the first embodiment.
  • FIG. 3 is a plan view showing a second iron core in the first embodiment.
  • FIG. 5 is a plan view showing a second divided core part in the first embodiment.
  • FIG. 5 is a schematic diagram (A) and (B) for illustrating a winding process in the first embodiment.
  • FIG. 5 is a cross-sectional view for illustrating the operation of the electric motor in the first embodiment.
  • FIG. 6 is a cross-sectional view showing a configuration of an electric motor according to a first modification of the first embodiment. 6 is a cross-sectional view showing a configuration of an electric motor according to a second modification of the first embodiment.
  • FIG. FIG. 10 is a plan view showing a second iron core of the electric motor in the second embodiment.
  • FIG. 6 is a cross-sectional view showing an electric motor in a third embodiment.
  • FIG. 6 is a cross-sectional view showing an electric motor in a third embodiment.
  • FIG. 10 is a plan view showing a first configuration example of a first iron core in the fifth embodiment.
  • FIG. 25 is a plan view showing a second configuration example of the first iron core in the fifth embodiment.
  • FIG. 25 is a plan view showing a third configuration example of the first iron core in the fifth embodiment.
  • FIG. 25 is a plan view showing a fourth configuration example of the first iron core in the fifth embodiment.
  • FIG. 23 is a plan view showing a first configuration example of a first iron core in the sixth embodiment.
  • FIG. 23 is a plan view showing a second configuration example of the first iron core in the sixth embodiment.
  • FIG. 23 is a plan view showing a third configuration example of the first iron core in the sixth embodiment.
  • FIG. 23 is a plan view showing a fourth configuration example of the first iron core in the sixth embodiment.
  • FIG. 23 is a plan view showing a fifth configuration example of the first iron core in the sixth embodiment. It is sectional drawing which shows the structure of the rotary compressor which can apply the electric motor of each embodiment. It is a figure which shows the structure of the refrigerating air conditioner provided with the rotary compressor of FIG.
  • FIG. 1 is a cross-sectional view showing a configuration of an electric motor 100 according to Embodiment 1 of the present invention.
  • This electric motor 100 is a permanent magnet embedded type electric motor in which the permanent magnet 25 is embedded in the rotor 2, and is used, for example, in a rotary compressor 500 (see FIG. 26).
  • the electric motor 100 is an electric motor called an inner rotor type, and includes a stator 1 and a rotor 2 that is rotatably provided inside the stator 1.
  • FIG. 1 is a cross-sectional view of a plane orthogonal to the rotation axis (axis C1) of the rotor 2.
  • the direction of the axis C1 which is the rotation axis of the rotor 2 is simply referred to as “axial direction”. Also.
  • the circumferential direction around the axis C1 is simply referred to as “circumferential direction”.
  • the radial direction of the stator 1 and the rotor 2 around the axis C1 is simply referred to as “radial direction”.
  • the arrow C1 indicates the axial direction
  • the arrow R1 indicates the circumferential direction.
  • the stator 1 has a stator core 10 and a winding 3 wound around the stator core 10.
  • the stator core 10 has a first iron core 10A and a second iron core 10B (FIG. 3), which will be described later.
  • the stator core 10 has an annular yoke 12 centered on the axis C1 and a plurality of teeth 11 extending from the yoke 12 inward in the radial direction (that is, in the direction toward the axis C1).
  • a tooth tip 13 that faces the outer peripheral surface of the rotor 2 is formed at the radially inner end of the tooth 11.
  • the tooth tip portion 13 is formed so that the width (length in the circumferential direction) is wider than other portions of the tooth 11. That is, the tooth front end portion 13 has protruding portions 14 that protrude on both sides in the circumferential direction.
  • nine teeth 11 are arranged at regular intervals in the circumferential direction, but the number of teeth 11 may be two or more. Between the teeth 11 adjacent to each other in the circumferential direction, a slot which is a space for arranging the winding 3 is formed.
  • stator core 10 has a configuration in which a plurality of (here, nine) divided cores 5 are connected in the circumferential direction for each tooth 11.
  • the split cores 5 are connected to each other by a connecting portion 15 provided at an end portion on the outer peripheral side of the yoke 12.
  • the connecting portion 15 is formed of, for example, a thin portion that can be plastically deformed.
  • the winding 3 that generates the rotating magnetic field is, for example, a magnet wire wound around the tooth 11 via an insulator 30 (FIG. 2) that is an insulating portion.
  • the number of turns and the diameter (wire diameter) of the winding 3 are determined in accordance with required characteristics (rotation speed, torque, etc.), applied voltage, and slot cross-sectional area.
  • the winding 3 is wound by concentrated winding and connected by Y connection.
  • the rotor 2 includes a cylindrical rotor core 21, a permanent magnet 25 attached to the rotor core 21, and a shaft 60 disposed at the center of the rotor core 21.
  • the shaft 60 is, for example, the shaft of the rotary compressor 500 (FIG. 26).
  • the rotor core 21 is formed by laminating a plurality of electromagnetic steel plates in the axial direction and fastening both ends in the axial direction with fixing members 41 and 42 (FIG. 3).
  • the thickness tr of the electromagnetic steel sheet constituting the rotor core 21 is, for example, 0.1 to 0.7 mm.
  • a plurality (six in this case) of magnet insertion holes 22 into which the permanent magnets 25 are inserted are formed along the outer peripheral surface of the rotor core 21.
  • the magnet insertion hole 22 is a through hole that penetrates the rotor core 21 in the axial direction.
  • the number of magnet insertion holes 22 (that is, the number of magnetic poles) is not limited to 6, but may be 2 or more. There is a gap between adjacent magnet insertion holes 22.
  • the permanent magnet 25 is a flat plate-like member that is long in the axial direction, has a width in the circumferential direction of the rotor core 21, and has a thickness in the radial direction.
  • the thickness of the permanent magnet 25 is 2 mm, for example.
  • the permanent magnet 25 is composed of, for example, a rare earth magnet mainly composed of neodymium (Nd), iron (Fe), and boron (B).
  • the permanent magnet 25 is magnetized in the thickness direction.
  • one permanent magnet 25 is arranged in one magnet insertion hole 22, but a plurality of permanent magnets 25 may be arranged in the circumferential direction in one magnet insertion hole 22.
  • the plurality of permanent magnets 25 in the same magnet insertion hole 22 are magnetized such that the same poles are directed radially outward.
  • a flux barrier (leakage flux suppression hole) 23 is formed at both ends in the circumferential direction of the magnet insertion hole 22.
  • the flux barrier 23 suppresses leakage magnetic flux between adjacent permanent magnets 25.
  • the core portion between the flux barrier 23 and the outer periphery of the rotor core 21 is a thin portion in order to suppress a short circuit of magnetic flux between the adjacent permanent magnets 25.
  • the thickness of the thin portion is preferably the same as the thickness of the electromagnetic steel plate constituting the rotor core 21.
  • FIG. 2 is a cross-sectional view showing a configuration of the electric motor 100 on a plane including the axis C1.
  • the stator core 10 includes a first iron core 10A constituted by a laminated body of electromagnetic steel plates and a second iron core 10B constituted by a laminated body of thin ribbons of amorphous metal or nanocrystalline metal.
  • the first iron core 10A and the second iron core 10B are alternately arranged in the axial direction (the direction of the axis C1).
  • the first iron core 10 ⁇ / b> A is disposed at at least both axial ends of the stator core 10.
  • the first iron cores 10A are arranged at both ends and the center in the axial direction of the stator iron core 10, respectively.
  • the 2nd iron core 10B is arrange
  • the thickness (axial length) of the first iron core 10A disposed at one axial end (the upper end in FIG. 2) of the stator core 10 is L1, and the thickness of the second iron core 10B adjacent thereto is L1.
  • the thickness of the first iron core 10A disposed at the center in the axial direction of the stator core 10 is L3, and the thickness of the second iron core 10B adjacent thereto is L4.
  • the thickness of the first iron core 10A disposed at (the lower end in FIG. 3) is L5.
  • the total L0 of the thickness of the first iron core 10A and the thickness of the second iron core 10B is the same as the axial length L6 of the rotor iron core 21 here, but is not necessarily the same ( (See FIG. 12 described later).
  • the first iron core 10 ⁇ / b> A protrudes radially outward from the second iron core 10 ⁇ / b> B.
  • the first iron core 10A is incorporated inside the cylindrical frame 6 of the electric motor 100 by shrink fitting, press fitting, welding, or the like.
  • This frame 6 is, for example, a part of a sealed container of the rotary compressor 500 (FIG. 26).
  • FIG. 3 is a plan view showing the first iron core 10A.
  • the first iron core 10A is composed of a laminated body in which electromagnetic steel sheets having a thickness (t1) of 0.35 to 1.00 mm are laminated in the axial direction.
  • t1 thickness of 0.35 to 1.00 mm
  • a non-oriented electrical steel sheet is used as the electrical steel sheet, but the invention is not limited to this.
  • the first iron core 10A has a yoke 12A (first yoke) extending in the circumferential direction and a plurality of teeth 11A (first teeth) extending radially inward from the yoke 12A.
  • the yoke 12A has an outer peripheral surface 16A that contacts the inner peripheral surface of the frame 6 (FIG. 2).
  • the number of teeth 11A is nine here.
  • first iron core 10A a portion corresponding to the divided core 5 (a portion including one tooth 11A each) is referred to as a first divided iron core portion 5A. That is, the first iron core 10A is divided into a plurality (here, nine) first divided iron core portions 5A in the circumferential direction.
  • a connecting portion 15 made of, for example, a thin portion is formed at the outer peripheral end of the yoke 12A.
  • the connection part 15 is arrange
  • the connecting portion 15 is a portion that connects the first divided core portions 5A adjacent to each other in the circumferential direction.
  • the plurality of first divided iron core portions 5A constituting the first iron core 10A are connected so as to be rotatable about the connecting portion 15. That is, the first iron core 10A can be developed in a band shape (see FIG. 8) and combined in an annular shape.
  • the connecting portion 15 is a thin-walled portion that can be plastically deformed, but is not limited to a thin-walled portion, and may be, for example, a circular crimped portion.
  • FIG. 4 is a plan view showing the first divided iron core portion 5A (first iron core 10A).
  • first iron core 10A first iron core 10A
  • the central portion in the circumferential direction of the yoke 12A is continuous with the teeth 11A.
  • a tooth front end portion 13A that faces the outer peripheral surface of the rotor 2 is formed on the radially inner side of the tooth 11A.
  • the teeth tip portion 13A is wider than the other portions of the teeth 11A and has protrusions 14A (first protrusions) on both sides in the circumferential direction.
  • the yoke 12A has an end face 17A that forms one end in the circumferential direction and an end face 18A that forms the other end in the circumferential direction.
  • the connecting portion 15 is formed between the outer peripheral surface 16A and the end surface 18A.
  • the end faces 17A and 18A correspond to divided surfaces.
  • the end surfaces 17A and 18A of the yoke 12A of the first divided iron core portion 5A are respectively in the circumferential direction adjacent to the first divided iron core portion 5A. It contacts the end faces 18A and 17A of the yoke 12A.
  • the end surfaces 17A and 18A extend radially outward from the inner peripheral surface of the yoke 12A toward the outer peripheral surface 16A, but do not reach the outer peripheral surface 16A.
  • a hole 105 is formed at the end of the end face 18A (that is, the end portion on the radially outer side).
  • the thin portion between the hole 105 of the yoke 12A and the outer peripheral surface 16A is a plastically deformable portion, and this thin portion constitutes the connecting portion 15.
  • a recess (notch) 19 is formed in the outer peripheral surface 16A of the yoke 12A.
  • the concave portion 19 is a portion for chucking the stator 1 with a jig in a winding step (FIG. 9) described later.
  • a caulking part (tea squeezing part) 101 is formed at the radial center of the teeth 11A.
  • crimped portions (yoke crimped portions) 102 and 103 are formed on both sides in the circumferential direction of the concave portion 19 of the yoke 12A.
  • the caulking part 101 of the teeth 11 and the caulking parts 102 and 103 of the yoke 12 fix the electromagnetic steel sheets adjacent in the axial direction to each other.
  • High dimensional accuracy and high rigidity of the first iron core 10 ⁇ / b> A (the teeth 11 ⁇ / b> A and the yoke 12 ⁇ / b> A) can be obtained by fixing the electromagnetic steel plate with the crimping portion 101 of the tooth 11 and the crimping portions 102 and 103 of the yoke 12.
  • the caulking portion 101 is not limited to the central portion of the tooth 11 ⁇ / b> A, and may be provided, for example, at both circumferential ends of the tooth distal end portion 13 or the circumferential central portion of the tooth distal end portion 13.
  • FIG. 5 is a plan view showing the configuration of the second iron core 10B.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal. Further, the second iron core 10B is configured by a laminated body in which thin ribbons having a thickness of 0.02 mm to 0.05 mm are laminated in the axial direction.
  • the second iron core 10B is fixed to the first iron core 10A (FIG. 3) with an adhesive or a resin.
  • the second iron core 10B when the second iron core 10B is formed of a laminate of amorphous metal ribbons, the second iron core 10B may be annealed in order to remove distortion generated during molding and improve magnetic characteristics.
  • the second iron core 10B is not limited to a laminate of amorphous metal or nanocrystalline metal ribbons, and may be formed of a compacted body of amorphous metal or nanocrystalline metal powder (see FIG. 12).
  • the second iron core 10B has a yoke 12B (second yoke) extending in the circumferential direction and a plurality of teeth 11B (second teeth) extending radially inward from the yoke 12B.
  • the yoke 12B has an outer peripheral surface 16B that faces the inner peripheral surface of the frame 6 (FIG. 3).
  • the number of teeth 11B is nine here.
  • a portion corresponding to the divided core 5 (a portion including one tooth 11B) is referred to as a second divided iron core portion 5B. That is, the second iron core 10B is divided into a plurality of (here, nine) second divided iron core portions 5B in the circumferential direction. The second divided core portions 5B adjacent in the circumferential direction are separated from each other by a gap G of 0.1 mm or less.
  • FIG. 6 is a plan view showing the second divided core part 5B (second iron core 10B).
  • the central portion in the circumferential direction of the yoke 12B is continuous with the teeth 11B.
  • a tooth front end portion 13B that faces the outer peripheral surface of the rotor 2 is formed on the radially inner side of the tooth 11B.
  • Teeth tip part 13B is wider than the other part of teeth 11B, and has protrusions 14B (second protrusions) on both sides in the circumferential direction.
  • the outer peripheral surface 16B of the yoke 12B is located radially inward from the outer peripheral surface 16A of the yoke 12A (FIG. 4). Further, the end surfaces 17B and 18B in the circumferential direction of the yoke 12B in the second divided core portion 5B are positioned on the inner side in the circumferential direction from the end surfaces 17A and 18A (FIG. 4) of the yoke 12A in the first divided core portion 5A. is doing.
  • the teeth 11B and the yoke 12B of the second iron core 10B are not provided with the caulking portions 101, 102, 103 (FIG. 4A) of the first iron core 10A.
  • FIG. 7A is a diagram showing the split core 5 (the first split core portion 5A and the second split core portion 5B), the insulator 30, and the winding 3.
  • the circumferential width of the teeth 11A of the first divided core portion 5A is T1
  • the radial width of the yoke 12A is Y1.
  • the circumferential width of the teeth 11B of the second divided core portion 5B is T2
  • the radial width of the yoke 12B is Y2.
  • the width T1 of the teeth 11A is smaller than the width T2 of the teeth 11B (T1 ⁇ T2), or the width Y1 of the yoke 12A is smaller than the width Y2 of the yoke 12B (Y1 ⁇ Y2) or both of them are established. That is, the first iron core 10A is configured to have a narrower magnetic path than the second iron core 10B.
  • the width T1 of the teeth 11A is smaller than the width T2 of the teeth 11B
  • the width Y1 of the yoke 12A is smaller than the width Y2 of the yoke 12B (that is, T1 ⁇ T2, and Y1 ⁇ Y2).
  • the radial width of the circumferential protrusion 14A of the tooth 11A is P1
  • the radial width of the circumferential protrusion 14B of the tooth 11B is P2.
  • the radial width P1 of the protrusion 14A of the tooth 11A is smaller than the radial width P2 of the protrusion 14B of the tooth 11B (P1 ⁇ P2).
  • the outer peripheral surface 16B of the yoke 12B is located on the radially inner side with respect to the outer peripheral surface 16A of the yoke 12A.
  • the distance r1 (FIG. 3) from the axis C1 to the outer peripheral surface 16A of the yoke 12A is larger than the distance r2 from the axis C1 to the outer peripheral surface 16B (FIG. 5) of the yoke 12B (r1> r2).
  • the radially inner end face (end face facing the rotor 2) of the tooth tip portion 13A is located on the same plane as the radial end face of the tooth tip portion 13B. However, it is not limited to such a configuration, and the end surface of the tooth tip portion 13A may be separated from the rotor 2 (see FIG. 14).
  • the winding 3 is wound around the teeth 11 (the teeth 11A and the teeth 11B) via the insulator 30.
  • the insulator 30 includes a peripheral wall portion 31 formed on both side surfaces 111 in the circumferential direction of the teeth 11 (more specifically, side surfaces 111B of the teeth 11B), and an inner peripheral surface 121 of the yoke 12 (more specifically, the yoke 12B). It has an outer wall 32 formed on the inner peripheral surface 121B) and an inner wall 33 formed on the radially outer surface of the protrusion 14.
  • the winding 3 is disposed in a region surrounded by the peripheral wall portion 31, the outer wall portion 32, and the inner wall portion 33 of the insulator 30. Moreover, the surrounding wall part 31 of the insulator 30 is also formed in the both end surfaces in the axial direction of the teeth 11 (refer FIG. 2). For example, a magnet wire having a diameter of 1.0 mm is wound 80 turns on each tooth 11 via an insulator 30 to form a winding 3.
  • the width T1 of the tooth 11A is smaller than the width T2 of the tooth 11B and the width Y1 of the yoke 12A is smaller than the width Y2 of the yoke 12B, the side surface 111A of the tooth 11A and the inner peripheral surface 121A of the yoke 12A A gap S is formed between the insulator 30 and the insulator 30.
  • the resin 35 may be filled between the side surface 111A of the tooth 11A and the inner peripheral surface 121A of the yoke 12A and the insulator 30. In this way, the insulator 30 can be held more firmly.
  • the outer peripheral surface 16B of the yoke 12B is located on the radially inner side with respect to the outer peripheral surface 16A of the yoke 12A. Therefore, as shown in FIG. 2, the outer peripheral surface 16 ⁇ / b> A of the yoke 12 ⁇ / b> A contacts the frame 6, but the outer peripheral surface 16 ⁇ / b> B of the yoke 12 ⁇ / b> B is separated from the frame 6. Accordingly, external force from the frame 6 acts on the first iron core 10A, but external force from the frame 6 does not act on the second iron core 10B.
  • end surfaces 17B and 18B (FIG. 4) of the yoke 12B in the second divided core portion 5B are positioned on the inner side in the circumferential direction from the end surfaces 17A and 18A (FIG. 6) of the yoke 12A in the first divided core portion 5A. is doing. Therefore, a gap G (FIG. 5) is formed between the second divided core portions 5B adjacent in the circumferential direction. Accordingly, the external force from the adjacent second divided core portion 5B does not act on the second divided core portion 5B.
  • the first iron core 10A is divided into a plurality of first divided iron core portions 5A connected by a connecting portion 15 on the outer peripheral side of the yoke 12A.
  • the second iron core 10B is divided into a plurality of second divided iron core portions 5B that are separated from each other via the gap G.
  • a plurality of ribbon portions having a shape having the teeth 11B and the yoke 12B are punched out from a ribbon of amorphous metal or nanocrystalline metal.
  • a plurality of punched ribbon portions are stacked in the axial direction and fixed to each other by bonding, thereby forming the second divided core portion 5B shown in FIG.
  • the plurality of second divided iron core portions 5B are fixed to the first iron core 10A (FIG. 8).
  • the stator core 10 in which the divided cores 5 are arranged in a strip shape is formed.
  • the insulator 30 (FIG. 7) is formed on the stator core 10.
  • the insulator 30 may be molded integrally with the stator core 10 by, for example, setting the stator core 10 in a mold and filling the resin, or a pre-molded resin molded body may be molded into the stator core 10. It may be formed by fitting in.
  • FIG. 9B are schematic views for explaining the winding process.
  • the split cores 5 for winding are fixed to the winding positions with jigs, The split core 5 is rotated around the connecting portion 15 so that the interval between adjacent teeth 11 is widened. Thereby, a wide space is formed around the teeth 11 where the winding is performed.
  • the winding 3 is wound around the teeth 11 of the split core 5 fixed at the winding position by using the winding nozzle 7 of the winding device.
  • the winding nozzle 7 rotates around the teeth 11 as shown by an arrow R ⁇ b> 2 in FIG. 9B, and winds the winding 3 around the teeth 11.
  • stator core 10 After winding the winding 3 around each tooth 11, the stator core 10 is assembled into an annular shape as shown in FIG. At this time, the butted portions (indicated by reference sign W in FIG. 1) of the split cores 5 at both ends of the stator core 10 are butted together and welded.
  • stator 1 including the stator core 10, the insulator 30, and the winding 3 is completed. Thereafter, the stator 1 is assembled inside the frame 6 by shrink fitting, press fitting, or welding. As described above, among the stator cores 10, the first iron core 10 ⁇ / b> A contacts the frame 6, but the second iron core 10 ⁇ / b> B does not contact the frame 6.
  • a steel plate portion having the shape of the rotor core 21 having the magnet insertion hole 22, the flux barrier 23, and the center hole 26 is punched out from the electromagnetic steel plate.
  • a plurality of punched steel plate portions are stacked in the axial direction, and fixed from both sides in the axial direction by fixing members 41 and 42 (FIG. 2), thereby forming the rotor core 21 shown in FIG.
  • the rotor 2 is formed by inserting the permanent magnet 25 into the magnet insertion hole 22 of the rotor core 21 and inserting the shaft 60 into the center hole 26. Thereafter, the rotor 2 is inserted inside the stator 1 mounted in the frame 6. Thereby, the electric motor 100 shown in FIG. 1 is completed.
  • FIG. 10 is a cross-sectional view for explaining the operation of the stator 1 of this embodiment.
  • the first core 10 ⁇ / b> A made of an electromagnetic steel plate is fixed inside the frame 6 by shrink fitting, press fitting, welding, or the like.
  • the second iron core 10 ⁇ / b> B made of amorphous metal or nanocrystalline metal is separated from the frame 6.
  • the stator core 10 (first iron core 10A and second iron core 10B) faces the outer peripheral surface of the rotor 2.
  • the magnetic flux from the permanent magnet 25 of the rotor 2 flows into the tooth 11 from the tooth tip portion 13 (FIG. 1) and flows radially outward in the tooth 11.
  • the magnetic flux that has flowed through the teeth 11 flows into the yoke 12 and further flows through the yoke 12 in the circumferential direction. In this way, a path (magnetic path) of magnetic flux passing through the teeth 11 and the yoke 12 is formed, and torque for rotating the rotor 2 is generated by the action of the magnetic flux and the current flowing through the winding 3.
  • the width T1 of the teeth 11A is smaller than the width T2 of the teeth 11B (T1 ⁇ T2). Further, the width P1 of the protruding portion 14A of the tooth 11A is smaller than the width P2 of the protruding portion 14B of the tooth 11B (P1 ⁇ P2). Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 tends to flow into the teeth 11B rather than the teeth 11A.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal.
  • the amorphous metal has an amorphous atom and no directionality
  • the nanocrystalline metal has a crystal grain refined to the order of 10 ⁇ m.
  • Both have excellent magnetic properties and low magnetoresistance. Therefore, the iron loss is reduced because the magnetic flux from the permanent magnet 25 of the rotor 2 flows more in the teeth 11B than in the teeth 11A.
  • the magnetic flux flowing through the teeth 11 flows into the yoke 12 on the outer peripheral side.
  • the width Y1 of the yoke 12A is smaller than the width Y2 of the yoke 12B (Y1 ⁇ Y2), so that the magnetic flux flows more in the yoke 12B than in the yoke 12A. Decrease.
  • the teeth 11A face the rotor 2.
  • the area where the teeth 11B face the rotor 2 is larger than the area. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 is more likely to flow to the second iron core 10B than to the first iron core 10A, and the iron loss can be further reduced.
  • the electrical steel sheet constituting the first iron core 10A is not as prominent as an amorphous metal, it has a property of increasing magnetic resistance when subjected to compressive stress. Therefore, when compressive stress from the frame 6 is applied to the first iron core 10A, the magnetic flux from the permanent magnet 25 of the rotor 2 is less likely to flow to the first iron core 10A. As a result, the magnetic flux flowing through the second iron core 10B made of amorphous metal or nanocrystalline metal (and thus having low magnetic resistance) increases, and iron loss can be further reduced.
  • the decrease in magnetic resistance when subjected to compressive stress is more remarkable than that of the electromagnetic steel sheet.
  • the second iron core 10B has a smaller outer diameter than the first iron core 10A and does not contact the frame 6, the compressive stress applied to the second iron core 10B can be suppressed. Therefore, an increase in the magnetic resistance of the second iron core 10B can be suppressed.
  • the mechanical strength of the second iron core 10B may be reduced. Since the iron core 10B does not contact the frame 6, damage to the second iron core 10B can be suppressed.
  • the rigidity of the stator 1 can be increased. it can.
  • the stator core 10 includes the first iron core 10A having the teeth 11A and the yoke 12A, and the second iron core 10B having the teeth 11B and the yoke 12B.
  • the first iron core 10A is composed of a laminate of electromagnetic steel sheets
  • the second iron core 10B is a laminate of a thin ribbon of amorphous metal or nanocrystalline metal, or a compression molding of amorphous metal powder or nanocrystalline metal powder. Consists of the body.
  • T1 ⁇ T2, Y1 ⁇ Y2, or both are established among the width T1 of the teeth 11A, the width T2 of the teeth 11B, the width Y1 of the yoke 12A, and the width Y2 of the yoke 12B. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 can easily flow to the second iron core 10B, and iron loss can be reduced.
  • the second iron core 10B (the teeth 11B and the yoke 12B) can be held by the first iron core 10A (the teeth 11A and the yoke 12A), the rigidity of the stator iron core 10 can be increased, and vibration and noise can be achieved. Can be suppressed.
  • the width P1 of the protruding portion 14A of the tooth 11A is smaller than the width P2 of the protruding portion 14B of the tooth 11B (P1 ⁇ P2), the magnetic flux from the permanent magnet 25 of the rotor 2 is transferred to the teeth 11B rather than the teeth 11A. Easy to flow in. Therefore, iron loss can be effectively reduced.
  • the outer diameter of the second iron core 10B is smaller than the outer diameter of the first iron core 10A.
  • an external force from the frame 6 can be received by the first iron core 10A. Therefore, an increase in the magnetic resistance of the second iron core 10B can be suppressed, and the iron loss can be effectively reduced.
  • the teeth 11A are larger than the area facing the rotor 2.
  • the area where 11B faces the rotor 2 is larger.
  • the first iron core 10A is disposed at both ends and the center of the stator core 10 in the axial direction, sufficient strength of the stator core 10 can be obtained.
  • the first iron core 10A is divided into a plurality of divided surfaces (17A, 18A) formed between adjacent teeth 11A, and is connected by a connecting portion 15 on the outer peripheral surface side of the yoke 12A. Therefore, in the winding process, the split core 5 can be rotated around the connecting portion 15 to form a wide space around the teeth 11, and the winding process is simplified. In addition, a high-density winding is possible with respect to the cross-sectional area of the slot, and a highly efficient electric motor 100 can be obtained.
  • the second iron core 10B is composed of a laminated body in which a plurality of thin ribbons are laminated or a compression molding body of powder, the second iron core 10B can be easily manufactured. Further, by interposing an adhesive between the plurality of ribbons, the second iron cores 10B can be firmly integrated with each other, and eddy current loss can be reduced. Also, annealing the amorphous metal ribbon stack removes the strain generated during molding and improves the magnetic properties.
  • FIG. 11 is a cross-sectional view showing the configuration of the electric motor of the first modification of the first embodiment.
  • the stator core 10 of the first embodiment has the first iron core 10A at both ends and the center in the axial direction (FIG. 2).
  • the stator core 10 of the first modification has the first iron core 10A only at both ends in the axial direction.
  • the second iron core 10B is disposed between the two first iron cores 10A.
  • the total thickness (L11 + L13) of the first core 10A is the second It is smaller than the thickness (L12) of the iron core 10B. That is, the magnetic flux from the permanent magnet 25 of the rotor 2 tends to flow to the second iron core 10B.
  • the portion of the stator core 10 excluding both axial end portions is constituted by the second iron core 10B, so that the magnetic flux from the permanent magnet 25 of the rotor 2 is the second iron core 10B. Easy to flow into. Therefore, iron loss can be reduced more effectively. Further, since the first iron core 10 ⁇ / b> A is disposed at both axial ends of the stator core 10, sufficient strength of the stator core 10 can be obtained.
  • FIG. 12 is a cross-sectional view showing the configuration of the electric motor of the second modification of the first embodiment.
  • the axial length of the stator core 10 is the same as the axial length of the rotor core 21 (FIG. 3).
  • the axial length of the stator core 10 is longer than the axial length of the rotor core 21.
  • the first iron cores 10 ⁇ / b> A at both axial ends of the stator core 10 are arranged on the outer side in the axial direction than both axial ends of the rotor core 21. Therefore, the area where the rotor core 21 and the second iron core 10B face each other is larger than that in the first embodiment.
  • the first embodiment is the same as the first embodiment in that the total thickness of the first iron core 10A is smaller than the total thickness of the second iron core 10B.
  • FIG. 12 shows an example in which the second iron core 10B is formed of a compact (compression compact) obtained by compression molding an amorphous metal or nanocrystalline metal powder. You may comprise with a laminated body of a thin strip.
  • the first iron core 10A at both axial ends of the stator core 10 is disposed on the outer side in the axial direction from both axial ends of the rotor core 21, so that the rotor core 21 And the area where the second iron core 10B opposes can be increased. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 easily flows to the second iron core 10B, and the iron loss can be reduced more effectively.
  • the first iron core 10 ⁇ / b> A is provided at both ends and the center in the axial direction of the stator core 10, but in the axial direction of the stator core 10 as in the first modification (FIG. 11).
  • the first iron core 10A may be provided only at both ends.
  • FIG. FIG. 13 is a plan view showing a second iron core 10C of the electric motor according to the second embodiment.
  • the second iron core 10B is formed of an amorphous metal or a nanocrystalline metal.
  • the 2nd iron core 10C is comprised with the laminated body of an electromagnetic steel plate.
  • the electrical steel sheet constituting the second iron core 10C is, for example, a non-oriented electrical steel sheet obtained by adding 3% to 6.5% silicon (Si) to high-purity iron (Fe).
  • the thickness t2 of the electromagnetic steel sheet (also referred to as the second electromagnetic steel sheet) constituting the second iron core 10C is equal to or less than the thickness t1 of the electromagnetic steel sheet (also referred to as the first electromagnetic steel sheet) constituting the first iron core 10A. is there.
  • the thickness t2 of the electrical steel sheet constituting the second iron core 10C is in the range of 0.1 mm ⁇ t2 ⁇ 0.35 mm.
  • the second iron core 10C has a yoke 12C (second yoke) extending in the circumferential direction and a plurality of teeth 11C (second teeth) extending radially inward from the yoke 12C.
  • the yoke 12C has an outer peripheral surface 16C that contacts the inner peripheral surface of the frame 6 (FIG. 2).
  • the number of teeth 11C is nine here.
  • a portion corresponding to the divided core 5 (a portion including one tooth 11C) is referred to as a second divided iron core portion 5C. That is, the second iron core 10C is divided into a plurality of (here, nine) second divided iron core portions 5C in the circumferential direction. End surfaces 17C and 18C in the circumferential direction of the yoke 12C in the second divided core portion 5C form a divided surface of the second core 10C.
  • the second divided core portions 5C of the second iron core 10C are connected to each other by a connecting portion 15C provided on the outer peripheral portion of the yoke 12C.
  • 15 C of connection parts are formed in the thin part similarly to the connection part 15 (FIG. 3) of Embodiment 1.
  • FIG. Since the second iron core 10C is formed of an electromagnetic steel plate, a configuration in which the plurality of second divided iron core portions 5C are connected by the connecting portion 15C as described above can be realized.
  • the same caulking portions 101, 102, 103 as the first iron core 10A are formed on the teeth 11C and the yoke 12C of the second iron core 10C.
  • the caulking portions 101, 102, and 103 are for fixing electromagnetic steel sheets adjacent in the axial direction to each other. High dimensional accuracy and high rigidity of the second iron core 10C can be obtained by fixing the electromagnetic steel plates with the crimping portions 101, 102, 103.
  • adhesion between the first iron core 10A and the second iron core 10C is unnecessary. .
  • the circumferential width T2 of the teeth 11B is larger than the circumferential width T1 (FIG. 4) of the teeth 11A (T1 ⁇ T2). Further, the radial width Y2 of the yoke 12B is larger than the radial width Y1 (FIG. 4) of the yoke 12A (Y1 ⁇ Y2). Further, the radial width P2 of the protruding portion 14B of the tooth 11B is larger than the radial width P1 of the protruding portion 14A of the tooth 11A (P1 ⁇ P2). That is, the second iron core 10C is configured to have a magnetic path wider than that of the first iron core 10A.
  • the configuration of the electric motor of the second embodiment is the same as that of the electric motor of the first embodiment except for the second iron core 10C.
  • the thickness t2 of the electromagnetic steel sheet constituting the second iron core 10C is equal to or less than the thickness t1 of the electromagnetic steel sheet constituting the first iron core 10A, and the second iron core 10C is more magnetic than the first iron core 10A. Since the path is wide, the magnetic flux from the permanent magnet 25 of the rotor 2 is more likely to flow to the second iron core 10C than to the first iron core 10A. As a result, iron loss can be reduced.
  • the stator core 10 includes the first iron core 10A having the teeth 11A and the yoke 12A, and the second iron core 10C having the teeth 11B and the yoke 12B.
  • 10A of 1st iron cores are comprised by the laminated body of the 1st electromagnetic steel plate of thickness t1
  • 10 C of 2nd iron cores are comprised by the laminated body of the 2nd electromagnetic steel plate of thickness t2 ( ⁇ t1). .
  • T1 ⁇ T2, Y1 ⁇ Y2, or both are established among the width T1 of the teeth 11A, the width T2 of the teeth 11B, the width Y1 of the yoke 12A, and the width Y2 of the yoke 12B. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 can easily flow to the second iron core 10B, and iron loss can be reduced.
  • the second iron core 10C is made of an electromagnetic steel plate, the stator core 10 having higher strength than the case of being made of an amorphous metal or a nanocrystalline metal can be obtained. Moreover, since the magnetic steel sheet is easy to process (for example, press processing), productivity can be improved and manufacturing cost can be reduced.
  • FIG. 14 is a cross-sectional view taken along a plane perpendicular to the axis C1, showing the electric motor according to Embodiment 3 of the present invention.
  • FIG. 15 is a cross-sectional view of the electric motor according to Embodiment 3 in a cross section including the axis C1.
  • the inner peripheral end surface (radially inner end surface) of the tooth tip portion 13A of the first iron core 10A and the inner peripheral end surface of the tooth tip portion 13B of the second iron core 10B are the same plane. (FIG. 7A).
  • the inner peripheral end surface of the tooth tip portion 13A is positioned on the radially outer side than the inner peripheral end surface of the tooth tip portion 13B.
  • the clearance between the outer peripheral surface 200 of the rotor 2 and the inner peripheral end surface of the tooth tip portion 13A is larger than the clearance between the outer peripheral surface 200 of the rotor 2 and the inner peripheral end surface of the tooth tip portion 13B. Is also big. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 is less likely to flow to the first iron core 10A and more likely to flow to the second iron core 10B. As a result, a large amount of magnetic flux flows through the second iron core 10B made of amorphous metal or nanocrystalline metal, thereby reducing iron loss.
  • the configuration of the electric motor of the third embodiment is the same as that of the electric motor of the first embodiment except for the configuration of the tooth tip portions 13A and 13B.
  • the magnetic flux from the permanent magnet 25 of the rotor 2 is the first. It becomes easier to flow to the second iron core 10B than the iron core 10A. Therefore, iron loss can be effectively reduced.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal (a thin laminate or a powder compression-molded body).
  • the second iron core 10B is made of the first iron core 10A. You may comprise with the laminated body of an electromagnetic steel plate thinner than an electromagnetic steel plate.
  • FIG. 16A is a cross-sectional view of a plane including axis C1, showing the electric motor according to Embodiment 4 of the present invention.
  • the rotor core 21 has a first iron core 21A and a second iron core 21B in the axial direction.
  • the first iron core 21 ⁇ / b> A faces the first iron core 10 ⁇ / b> A of the stator core 10
  • the second iron core 21 ⁇ / b> B faces the second iron core 10 ⁇ / b> B of the stator core 10.
  • the outer peripheral surface 201 of the first iron core 21A is formed at a position retracted radially inward (side away from the stator 1) from the outer peripheral surface 202 of the second iron core 21B. That is, the gap between the outer peripheral surface 201 of the first iron core 21A and the inner peripheral surface of the first iron core 10A (that is, the inner peripheral end surface of the tooth tip portion 13A shown in FIG. 4) is the outer periphery of the second iron core 21B. It is wider than the gap between the surface 202 and the inner peripheral surface of the second iron core 10B (that is, the inner peripheral end surface of the tooth tip portion 13B shown in FIG. 6).
  • FIG. 16B is a cross-sectional view of the second iron core 21B of the rotor 2.
  • FIG. 16C is a cross-sectional view of the first iron core 21 ⁇ / b> A of the rotor 2.
  • the outer peripheral surface 202 of the second iron core 21B is formed in a circumferential shape centering on the axis C1.
  • the outer peripheral surface 201 of the first iron core 21 ⁇ / b> A is between the poles (the circumference of the permanent magnet 25) with respect to the pole center (the central portion in the circumferential direction of the permanent magnet 25). End in the direction) has a shape protruding radially outward.
  • the clearance between the outer peripheral surface 201 of the first iron core 21A of the rotor core 21 and the inner peripheral surface of the stator core 10 is such that the outer peripheral surface 202 of the second iron core 21B of the rotor core 21 and the stator core. It is larger than the gap with 10 inner peripheral surfaces. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 is less likely to flow through the first iron core 10A and more likely to flow through the second iron core 10B. As a result, a large amount of magnetic flux flows through the second iron core 10B made of amorphous metal or nanocrystalline metal, thereby reducing iron loss.
  • the configuration of the electric motor of the fourth embodiment is the same as that of the electric motor of the first embodiment except for the configuration of the rotor core 21.
  • the first iron core 21 ⁇ / b> A of the rotor iron core 21 that faces the first iron core 10 ⁇ / b> A of the stator iron core 10 is the same as the rotor iron core 21 that faces the second iron core 10 ⁇ / b> B of the stator iron core 10. It is retracted radially inward from the second iron core 21B. Therefore, the magnetic flux from the permanent magnet 25 of the rotor 2 is more likely to flow to the second iron core 10B than to the first iron core 10A. Thereby, an iron loss can be reduced effectively.
  • the arrangement in the axial direction of the first iron core 10A described in the first modification (FIG. 11) or the second modification (FIG. 12) may be applied to the fourth embodiment.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal (a thin laminate or a powder compact), but is made of a magnetic steel sheet as in the second embodiment. Also good.
  • the configuration of the rotor core 21 of the fourth embodiment may be combined.
  • FIG. 17 is a plan view showing a first configuration example of first iron core 10A of stator core 10 according to Embodiment 5 of the present invention.
  • a first iron core 10A corresponding to the first divided iron core portion 5A is shown.
  • a long hole 300 (gap) is formed in the tooth tip 13A of the first iron core 10A.
  • the long hole 300 is a hole extending in the circumferential direction.
  • the long hole 300 includes end edges 301 and 302 that extend in an arc shape on the radially outer side and the radially inner side, and a pair of end edges 303 that are positioned at both ends in the circumferential direction of the end edges 301 and 302. Yes.
  • FIG. 18 is a plan view showing a second configuration example of the first iron core 10A of the fifth embodiment.
  • a plurality of holes 310 are formed in the tooth tip portion 13 ⁇ / b> A instead of the long hole 300 shown in FIG. 17.
  • the hole 310 is, for example, a circular hole, but is not limited to a circular shape.
  • the plurality of holes 310 are arranged in the circumferential direction along the inner peripheral end face of the tooth tip portion 13A.
  • FIG. 19 is a plan view showing a third configuration example of the first iron core 10A of the fifth embodiment.
  • a groove 320 (hollow portion) is formed on the inner peripheral end face of the tooth tip portion 13A.
  • the groove 320 has an end edge 321 extending in the circumferential direction and a pair of end edges 322 located at both ends of the end edge 321.
  • FIG. 20 is a plan view showing a fourth configuration example of the first iron core 10A of the fifth embodiment.
  • a plurality of grooves 330 are formed on the inner peripheral end face of the tooth tip portion 13A.
  • the groove 330 is, for example, a semicircular groove, but is not limited to a semicircular shape.
  • the plurality of grooves 330 are arranged in the circumferential direction along the inner peripheral end face of the tooth tip portion 13A.
  • the configuration of the electric motor of the fifth embodiment is the same as that of the electric motor of the first embodiment except that a hollow portion is formed in the tooth tip portion 13A of the first iron core 10A.
  • the magnetic resistance of the first iron core 10A is increased, and the permanent magnet of the rotor 2 is increased. 25 magnetic flux is less likely to flow through the first iron core 10A. As a result, the magnetic flux of the permanent magnet 25 of the rotor 2 flows more in the second iron core 10B (FIG. 2), and iron loss can be reduced.
  • the inner diameter of the first iron core 10A and the inner diameter of the second iron core 10B can be made the same, the first iron core 10A and the second iron core 10B can be assembled on the basis of the inner diameter. Accuracy is improved.
  • the shape of the hollow portion of the tooth tip portion 13A is not limited to the example shown in FIGS. 17 to 20, but may be any shape that makes it difficult for the magnetic flux of the permanent magnet 25 of the rotor 2 to flow to the tooth tip portion 13A.
  • the arrangement in the axial direction of the first iron core 10A described in the first modification (FIG. 11) or the second modification (FIG. 12) may be applied to the fifth embodiment.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal (a thin laminate or a powder compact), but is made of a magnetic steel sheet as in the second embodiment. Also good.
  • the configuration of the stator core 10 described in the third embodiment (FIG. 14) may be applied, or the configuration of the rotor core 21 described in the fourth embodiment (FIG. 16) may be applied.
  • FIG. 21 is a plan view showing a first configuration example of first iron core 10A of stator core 10 according to Embodiment 6 of the present invention.
  • FIG. 21 shows a first iron core 10A corresponding to the first divided iron core portion 5A.
  • three elongated holes 340 (hollow portions) extending in the radial direction are formed in the teeth 11A of the first iron core 10A. These three long holes 340 are arranged at intervals in the circumferential direction.
  • Each long hole 340 has a pair of end edges 341 extending in the radial direction and a pair of end edges 342 extending in the circumferential direction. Note that the number of the long holes 340 is not limited to three and may be one or more.
  • the long hole 340 extends over the entire radial direction of the tooth 11A, that is, until it reaches the yoke 12A from the tooth tip portion 13A. However, the extending range of the long hole 340 may be a range in which the magnetic resistance of the teeth 11A can be increased.
  • FIG. 22 is a plan view showing a second configuration example of the first iron core 10A of the sixth embodiment.
  • four long holes 350 (cavities) extending in the circumferential direction are formed in the teeth 11 ⁇ / b> A.
  • the four long holes 350 are arranged at intervals in the radial direction.
  • Each long hole 350 has a pair of end edges 351 extending in the circumferential direction and a pair of end edges 352 extending in the radial direction.
  • the number of the long holes 350 is not limited to four and may be one or more.
  • the long hole 350 is formed over the entire radial direction of the tooth 11A, that is, in a range reaching the yoke 12A from the tooth tip 13A.
  • the range in which the long hole 350 is formed may be a range in which the magnetic resistance of the teeth 11A can be increased.
  • FIG. 23 is a plan view showing a third configuration example of the first iron core 10A of the sixth embodiment.
  • seven long holes 360 (cavities) extending in the radial direction are formed in the yoke 12A.
  • the seven long holes 360 are arranged at intervals in the circumferential direction.
  • Each long hole 360 has a pair of end edges 361 extending in the radial direction and a pair of end edges 362 extending in the circumferential direction. Note that the number of the long holes 360 is not limited to seven and may be one or more.
  • the long hole 360 is formed over the entire circumferential direction of the yoke 12A. However, the range in which the long hole 360 is formed may be a range in which the magnetic resistance of the yoke 12A can be increased.
  • FIG. 24 is a plan view showing a fourth configuration example of the first iron core 10A of the sixth embodiment.
  • two long holes 370 (cavities) extending in the circumferential direction are formed in the yoke 12A.
  • the two long holes 370 are arranged at intervals in the radial direction.
  • Each long hole 370 has a pair of end edges 371 extending in the circumferential direction and a pair of end edges 372 extending in the radial direction. Note that the number of the long holes 370 is not limited to two but may be one or more.
  • the long hole 370 is formed over the entire circumferential direction of the yoke 12A. However, the range in which the long hole 370 is formed may be a range in which the magnetic resistance of the yoke 12A can be increased.
  • FIG. 25 is a plan view showing another configuration example of the sixth embodiment.
  • two L-shaped long holes 400 (hollow portions) and one T-shaped long hole 410 (hollow portion) are formed from the teeth 11A to the yoke 12A.
  • the long hole 400 includes a first portion 401 that extends in the radial direction in the tooth 11 ⁇ / b> A and a second portion 402 that extends in the circumferential direction in the yoke 12 ⁇ / b> A, and the first portion 401 and the second portion 402. Are connected at the ends.
  • the first portion 401 extends along the side surface 111A of the tooth 11A
  • the second portion 402 extends along the inner peripheral surface 121A of the yoke 12A.
  • the long hole 410 has a first portion 411 extending radially in the teeth 11A and a second portion 412 extending in both sides of the yoke 12A in the circumferential direction.
  • the end of the first portion 411 is The second portion 412 is connected to the central portion in the circumferential direction.
  • the first portion 411 of the long hole 410 is formed between the first portions 401 of the two long holes 400.
  • the second portion 412 of the long hole 410 is formed on the radially outer side of the second portion 402 of the long hole 400.
  • the number of long holes should just be one or more.
  • the range in which the long holes 400 and 410 are formed may be a range in which the magnetic resistance of the teeth 11A and the yoke 12A can be increased.
  • the configuration of the electric motor of the sixth embodiment is the same as that of the electric motor of the first embodiment except that a hollow portion is formed in at least one of the teeth 11A and the yoke 12A of the first iron core 10A.
  • the magnetic resistance of the first iron core 10A is increased,
  • the magnetic flux of the permanent magnet 25 of the rotor 2 becomes difficult to flow to the first iron core 10A.
  • the magnetic flux of the permanent magnet 25 of the rotor 2 flows more in the second iron core 10B (FIG. 2), and iron loss can be reduced.
  • the shapes of the hollow portions of the teeth 11A and the yoke 12A are not limited to the examples shown in FIGS. 21 to 25, and may be any shape that makes it difficult for the magnetic flux of the permanent magnet 25 of the rotor 2 to flow to the first iron core 10A. .
  • the arrangement in the axial direction of the first iron core 10A described in the first modification (FIG. 11) or the second modification (FIG. 12) may be applied to the sixth embodiment.
  • the second iron core 10B is made of an amorphous metal or a nanocrystalline metal (a thin laminate or a powder compact), but is made of a magnetic steel sheet as in the second embodiment. Also good.
  • the configuration of the stator core 10 described in the third embodiment (FIG. 14) may be applied, or the configuration of the rotor core 21 described in the fourth embodiment (FIG. 16) may be applied.
  • FIG. 26 is a cross-sectional view showing a configuration of the rotary compressor 500.
  • the rotary compressor 500 includes an airtight container 507, a compression element 501 disposed in the airtight container 507, and an electric motor 100 that drives the compression element 501.
  • the compression element 501 includes a cylinder 502 having a cylinder chamber 503, a shaft 60 rotated by the electric motor 100, a rolling piston 504 fixed to the shaft 60, and a vane (not shown) that divides the cylinder chamber 503 into a suction side and a compression side. And an upper frame 505 and a lower frame 506 that insert the shaft 60 and close the axial end surface of the cylinder chamber 503. An upper discharge muffler 508 and a lower discharge muffler 509 are mounted on the upper frame 505 and the lower frame 506, respectively.
  • the sealed container 507 is a cylindrical container formed by drawing a steel plate having a thickness of 3 mm, for example. Refrigerating machine oil (not shown) that lubricates the sliding portions of the compression element 501 is stored at the bottom of the sealed container 507.
  • the shaft 60 is rotatably held by an upper frame 505 and a lower frame 506 as bearing portions.
  • the cylinder 502 includes a cylinder chamber 503 inside, and the rolling piston 504 rotates eccentrically within the cylinder chamber 503.
  • the shaft 60 has an eccentric shaft portion, and a rolling piston 504 is fitted to the eccentric shaft portion.
  • the sealed container 507 has a cylindrical frame 6.
  • the stator 1 of the electric motor 100 is incorporated inside the frame 6 by a method such as shrink fitting, press fitting, or welding. Electric power is supplied to the winding 3 of the stator 1 from a glass terminal 511 fixed to the hermetic container 507.
  • the shaft 60 is fixed to a center hole 26 formed at the center of the rotor core 21 (FIG. 1) of the rotor 2.
  • An accumulator 510 that stores refrigerant gas is attached to the outside of the sealed container 507.
  • a suction pipe 513 is fixed to the sealed container 507, and refrigerant gas is supplied from the accumulator 510 to the cylinder 502 via the suction pipe 513.
  • a discharge pipe 512 for discharging the refrigerant to the outside is provided at the upper part of the sealed container 507.
  • refrigerant for example, R410A, R407C, or R22 can be used. Moreover, it is desirable to use a low GWP (global warming potential) refrigerant from the viewpoint of preventing global warming.
  • GWP global warming potential
  • the operation of the rotary compressor 500 is as follows.
  • the refrigerant gas supplied from the accumulator 510 is supplied into the cylinder chamber 503 of the cylinder 502 through the suction pipe 513.
  • the shaft 60 rotates together with the rotor 2.
  • the rolling piston 504 fitted to the shaft 60 rotates eccentrically in the cylinder chamber 503, and the refrigerant is compressed in the cylinder chamber 503.
  • the refrigerant compressed in the cylinder chamber 503 passes through the discharge mufflers 508 and 509, and further rises in the sealed container 507 through a hole (not shown) provided in the rotor core 21.
  • the refrigerant rising in the sealed container 507 is discharged from the discharge pipe 512 and supplied to the high-pressure side of the refrigeration cycle.
  • the refrigerating machine oil is mixed in the refrigerant compressed in the cylinder chamber 503, the separation of the refrigerant and the refrigerating machine oil is promoted when passing through the hole provided in the rotor core 21, and the refrigerating machine oil Inflow to the discharge pipe 512 is prevented.
  • the rotary compressor 500 can be applied to the electric motor 100 described in each embodiment and each modification, and the electric motor 100 has a small iron loss and sufficient strength. Therefore, the energy efficiency and reliability of the rotary compressor 500 can be improved.
  • the electric motor 100 of each embodiment and each modification can be used not only for the rotary compressor 500 but also for other types of compressors.
  • FIG. 27 is a diagram illustrating a configuration of the refrigeration air conditioner 600.
  • 27 includes a compressor (rotary compressor) 500, a four-way valve 601, a condenser 602, a decompression device (expander) 603, an evaporator 604, a refrigerant pipe 605, And a control unit 606.
  • the compressor 500, the condenser 602, the decompression device 603, and the evaporator 604 are connected by a refrigerant pipe 605 to constitute a refrigeration cycle.
  • the operation of the refrigerating and air-conditioning apparatus 600 is as follows.
  • the compressor 500 compresses the sucked refrigerant and sends it out as a high-temperature and high-pressure gas refrigerant.
  • the four-way valve 601 switches the flow direction of the refrigerant.
  • the refrigerant sent from the compressor 500 flows to the condenser 602.
  • the condenser 602 exchanges heat between the refrigerant sent from the compressor 500 and air (for example, outdoor air), condenses and liquefies the refrigerant, and sends it out.
  • the decompression device 603 expands the liquid refrigerant sent out from the condenser 602 and sends it out as a low-temperature and low-pressure liquid refrigerant.
  • the evaporator 604 exchanges heat between the low-temperature and low-pressure liquid refrigerant sent out from the decompression device 603 and air (for example, indoor air), causes the refrigerant to take away the heat of the air, and evaporates (vaporizes) the gas refrigerant. Send out as.
  • the air from which heat has been removed by the evaporator 604 is supplied to a target space (for example, a room) by a blower (not shown).
  • the operations of the four-way valve 601 and the compressor 500 are controlled by the control unit 606.
  • the compressor 100 of the refrigerating and air-conditioning apparatus 600 can be applied to the electric motor 100 described in each embodiment and each modification, and the electric motor 100 has a small iron loss and sufficient strength. Therefore, the energy efficiency and reliability of the refrigeration air conditioner 600 can be improved.
  • components other than the compressor 500 in the refrigerating and air-conditioning apparatus 600 are not limited to the above-described configuration example.
  • stator core 10A 1st Iron core, 10B 2nd iron core, 11 teeth, 11A teeth (first teeth), 11B, 11C teeth (second teeth), 12 yoke, 12A yoke (first yoke), 12B, 12C yoke (second) 2 yoke), 13, 13A, 13B, 13C teeth tip, 15 connecting portion (crimping portion), 16A, 16B, 16C outer peripheral surface, 17A, 18A end surface (divided surface), 17B, 18B end surface, 21 rotor core , 21A 1st iron core, 21B 2nd iron core, 22 magnet insertion hole, 23 Lux barrier, 25 permanent magnet, 26 center hole, 30 insulator, 41, 42 fixed member, 60 shaft, 100 electric motor, 101, 102, 103 caulking part, 105 hole, 201,

Landscapes

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

Abstract

La présente invention concerne un stator (100) comprenant un premier noyau de fer (10A) et un second noyau de fer (10B). Le premier noyau de fer (10A) comprend : une première culasse (12A) s'étendant dans une direction circonférentielle ayant un axe (C1) au niveau de son centre ; et des premières dents (11A) s'étendant vers l'axe à partir de la première culasse (12A). Le second noyau de fer (10B) comprend une seconde culasse (12B) adjacente à la première culasse (12B) dans la direction de l'axe (C1) et des secondes dents (11B) adjacentes aux premières dents (11A) dans la direction de l'axe (C1). Le premier noyau de fer (10A) est conçu à partir d'un corps stratifié de plaques d'acier électromagnétiques et le second noyau de fer (10B) est conçu à partir d'une bande mince d'un corps stratifié d'un métal amorphe ou d'un métal nanocristallin, ou à partir d'un corps moulé par compression d'une poudre d'un métal amorphe ou d'un métal nanocristallin. Lorsque la largeur de la première culasse (12A) dans une direction radiale ayant l'axe (C1) au niveau de son centre est désignée par Y1, la largeur de la seconde culasse (12B) dans la direction radiale est désignée par Y2, la largeur des premières dents (11A) dans la direction circonférentielle est désignée par T1, et la largeur des secondes dents (11B) dans la direction circonférentielle est désignée par T2, Y1 < Y2 et/ou T1 < T2 sont satisfaits.
PCT/JP2017/002896 2017-01-27 2017-01-27 Stator, moteur électrique, compresseur et dispositif de réfrigération/climatisation WO2018138866A1 (fr)

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PCT/JP2017/002896 WO2018138866A1 (fr) 2017-01-27 2017-01-27 Stator, moteur électrique, compresseur et dispositif de réfrigération/climatisation

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6841975B1 (ja) * 2019-09-27 2021-03-10 三菱電機株式会社 電機子鉄心、電機子および電動機
JP2021061677A (ja) * 2019-10-07 2021-04-15 三菱電機株式会社 回転電機
WO2021117175A1 (fr) * 2019-12-12 2021-06-17 三菱電機株式会社 Stator, moteur, compresseur et climatiseur
WO2022070864A1 (fr) * 2020-09-30 2022-04-07 ダイキン工業株式会社 Moteur
CN114294326A (zh) * 2021-12-27 2022-04-08 珠海格力电器股份有限公司 磁悬浮径向轴承、电机

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130304U (fr) * 1973-03-09 1974-11-08
JP2003284276A (ja) * 2002-03-25 2003-10-03 Mitsubishi Electric Corp 回転電機
JP2004229404A (ja) * 2003-01-22 2004-08-12 Genesis:Kk リラクタンスモータおよびリラクタンスモータ用ステータの磁石
JP2005151648A (ja) * 2003-11-12 2005-06-09 Daikin Ind Ltd モータ及びモータの製造方法並びに駆動装置、圧縮機、移動体
JP2006501796A (ja) * 2002-09-30 2006-01-12 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 電気的な機械のためのステータ
JP2006101673A (ja) * 2004-09-30 2006-04-13 Hitachi Industrial Equipment Systems Co Ltd 永久磁石を備えた回転電機及びその固定子鉄心の歯部製造方法
JP2006296010A (ja) * 2005-04-06 2006-10-26 Matsushita Electric Ind Co Ltd 密閉型圧縮機
JP2009538594A (ja) * 2006-05-25 2009-11-05 ライト・エンジニアリング・インコーポレーテッド 低損失材料を使用する高効率高速電気装置
JP2014155347A (ja) * 2013-02-08 2014-08-25 Mitsubishi Electric Corp 分割鉄心、及びこの分割鉄心を用いた固定子、並びにこの固定子を備えた回転電機
JP2015211603A (ja) * 2014-04-30 2015-11-24 三菱電機株式会社 電動機、密閉型圧縮機及び冷凍サイクル装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130304U (fr) * 1973-03-09 1974-11-08
JP2003284276A (ja) * 2002-03-25 2003-10-03 Mitsubishi Electric Corp 回転電機
JP2006501796A (ja) * 2002-09-30 2006-01-12 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング 電気的な機械のためのステータ
JP2004229404A (ja) * 2003-01-22 2004-08-12 Genesis:Kk リラクタンスモータおよびリラクタンスモータ用ステータの磁石
JP2005151648A (ja) * 2003-11-12 2005-06-09 Daikin Ind Ltd モータ及びモータの製造方法並びに駆動装置、圧縮機、移動体
JP2006101673A (ja) * 2004-09-30 2006-04-13 Hitachi Industrial Equipment Systems Co Ltd 永久磁石を備えた回転電機及びその固定子鉄心の歯部製造方法
JP2006296010A (ja) * 2005-04-06 2006-10-26 Matsushita Electric Ind Co Ltd 密閉型圧縮機
JP2009538594A (ja) * 2006-05-25 2009-11-05 ライト・エンジニアリング・インコーポレーテッド 低損失材料を使用する高効率高速電気装置
JP2014155347A (ja) * 2013-02-08 2014-08-25 Mitsubishi Electric Corp 分割鉄心、及びこの分割鉄心を用いた固定子、並びにこの固定子を備えた回転電機
JP2015211603A (ja) * 2014-04-30 2015-11-24 三菱電機株式会社 電動機、密閉型圧縮機及び冷凍サイクル装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6841975B1 (ja) * 2019-09-27 2021-03-10 三菱電機株式会社 電機子鉄心、電機子および電動機
JP2021061677A (ja) * 2019-10-07 2021-04-15 三菱電機株式会社 回転電機
WO2021117175A1 (fr) * 2019-12-12 2021-06-17 三菱電機株式会社 Stator, moteur, compresseur et climatiseur
JPWO2021117175A1 (fr) * 2019-12-12 2021-06-17
JP7345562B2 (ja) 2019-12-12 2023-09-15 三菱電機株式会社 ステータ、モータ、圧縮機、及び空気調和機
WO2022070864A1 (fr) * 2020-09-30 2022-04-07 ダイキン工業株式会社 Moteur
JP2022057117A (ja) * 2020-09-30 2022-04-11 ダイキン工業株式会社 モータ
JP7082301B2 (ja) 2020-09-30 2022-06-08 ダイキン工業株式会社 モータ
CN114294326A (zh) * 2021-12-27 2022-04-08 珠海格力电器股份有限公司 磁悬浮径向轴承、电机
CN114294326B (zh) * 2021-12-27 2023-01-10 珠海格力电器股份有限公司 磁悬浮径向轴承、电机

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