WO2020090007A1 - Rotor à pôles conséquents, moteur électrique, ventilateur, dispositif de réfrigération et de climatisation ainsi que procédé de fabrication de rotor à pôles conséquents - Google Patents

Rotor à pôles conséquents, moteur électrique, ventilateur, dispositif de réfrigération et de climatisation ainsi que procédé de fabrication de rotor à pôles conséquents Download PDF

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Publication number
WO2020090007A1
WO2020090007A1 PCT/JP2018/040332 JP2018040332W WO2020090007A1 WO 2020090007 A1 WO2020090007 A1 WO 2020090007A1 JP 2018040332 W JP2018040332 W JP 2018040332W WO 2020090007 A1 WO2020090007 A1 WO 2020090007A1
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WO
WIPO (PCT)
Prior art keywords
iron core
core
slit
iron
rotor
Prior art date
Application number
PCT/JP2018/040332
Other languages
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.)
Filing date
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 JP2020554646A priority Critical patent/JP6964796B2/ja
Priority to PCT/JP2018/040332 priority patent/WO2020090007A1/fr
Publication of WO2020090007A1 publication Critical patent/WO2020090007A1/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
    • H02K1/06—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
    • H02K1/2746—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 arranged with the same polarity, e.g. consequent pole type
    • 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 rotor for an electric motor, particularly a consequent pole type rotor.
  • a consequent pole type rotor is used as a rotor of an electric motor.
  • two or more permanent magnets are arranged on the rotor core so that one of the N pole and the S pole of the permanent magnet faces the stator of the electric motor.
  • the number of permanent magnets arranged on the rotor core is half the number of magnetic poles of the rotor. For example, when the rotor has 4 magnetic poles, it has 2 permanent magnets.
  • a region (also referred to as salient pole) between two permanent magnets adjacent to each other in the circumferential direction functions as an S pole (for example, Patent Document 1). 1).
  • the magnetic flux from each permanent magnet easily flows into the region between two adjacent permanent magnets. That is, the leakage magnetic flux is likely to increase. As a result, there is a problem that the torque of the electric motor tends to decrease. Therefore, in the rotor disclosed in Patent Document 2, the rotor core is divided into an inner magnetic pole portion and an outer magnetic pole portion. Since a space is formed outside the outer magnetic pole portion in the circumferential direction, the leakage magnetic flux is reduced.
  • the inner magnetic pole part and the outer magnetic pole part which are separated from each other, are fixed by the cover member, so that the rotor is not easily assembled and the rigidity of the rotor is insufficient. If the rotor is not rigid enough, the motor will experience vibration and noise. On the other hand, if the inner magnetic pole portion and the outer magnetic pole portion are integrated, the rigidity of the rotor is increased, but there is a problem that the leakage magnetic flux increases and the torque of the electric motor decreases.
  • the purpose of the present invention is to facilitate the assembly of the rotor, reduce the leakage magnetic flux in the rotor, and reduce the vibration and noise in the electric motor having this rotor.
  • a consequent pole type rotor is a consequent pole type rotor having a plurality of iron cores having slits extending in the axial direction and permanent magnets arranged in the slits, A first iron core of the plurality of iron cores having a slit, the slit, a first inner iron core portion located inside the slit in the radial direction, and a diameter separated from the first inner iron core portion.
  • a second outer core of the plurality of iron cores having a first outer core located outside the slit in the direction, the slit, and a second inner core located inside the slit in the radial direction.
  • a second outer core portion separated from the second inner core portion and located outside the slit in the radial direction, a third iron core of the plurality of iron cores,
  • the first iron core, the second iron core, and the third iron core are laminated in the axial direction, and at least one of the first inner iron core portion and the first outer iron core portion is circumferentially arranged in the circumferential direction. It has a protrusion facing the permanent magnet.
  • the present invention it is possible to facilitate the assembly of the rotor, reduce the leakage magnetic flux in the rotor, and reduce the vibration and noise in the electric motor having this rotor.
  • FIG. 3 is a partial cross-sectional view schematically showing the structure of the electric motor according to Embodiment 1 of the present invention. It is sectional drawing which shows schematically the structure of the electric motor 1 in an xy plane. It is a figure which shows the some division
  • FIG. 22 is an enlarged view showing a part of the structure of the rotor shown in FIG. 21. It is a figure which shows schematically the structure of the fan which concerns on Embodiment 2 of this invention. It is a figure which shows roughly the structure of the air conditioner which concerns on Embodiment 3 of this invention.
  • the z-axis direction indicates a direction parallel to the axis Ax of the electric motor 1
  • the x-axis direction is orthogonal to the z-axis direction (z-axis).
  • the y-axis direction indicates a direction orthogonal to both the z-axis direction and the x-axis direction.
  • the axis Ax is the center of rotation of the rotor 3.
  • the direction parallel to the axis Ax is also referred to as "axial direction of the rotor 3" or simply "axial direction”.
  • the radial direction is the radial direction of the rotor 3 and is the direction orthogonal to the axis Ax.
  • the xy plane is a plane orthogonal to the axial direction.
  • the arrow D1 indicates the circumferential direction around the axis Ax (hereinafter, also simply referred to as “circumferential direction”).
  • FIG. 1 is a partial cross-sectional view schematically showing the structure of an electric motor 1 according to the first embodiment of the present invention.
  • FIG. 2 is a sectional view schematically showing the structure of the electric motor 1 on the xy plane.
  • the mold resin 23 is removed from the stator 2.
  • the electric motor 1 includes a stator 2, a rotor 3, a circuit board 4, a magnetic sensor 5 for detecting a rotational position of the rotor 3, a bracket 6, bearings 7a and 7b, and a rotational position detection of the rotor 3. And a sensor magnet 8 as a use magnet.
  • the electric motor 1 is, for example, a permanent magnet synchronous electric motor driven by an inverter.
  • the rotor 3 is rotatably arranged inside the stator core 20.
  • the stator 2 has a stator core 20, a coil 21 wound around the stator core 20, and a mold resin 23.
  • the stator core 20 has at least one yoke 20b and a plurality of teeth 20c.
  • An insulator 22 may be arranged between the stator core 20 and the coil 21.
  • the mold resin 23 covers the stator core 20 and the coil 21. Therefore, the stator 2 shown in FIG. 1 is also referred to as a mold stator.
  • the circuit board 4 is provided on one end side of the stator 2 in the axial direction. Electronic components such as a control circuit and a magnetic sensor 5 are attached to the circuit board 4. Further, the lead wire is connected to the circuit board 4.
  • the magnetic sensor 5 detects the rotational position of the rotor 3 by detecting the rotational position of the sensor magnet 8.
  • the sensor magnet 8 is attached to the rotor 3 so as to face the magnetic sensor 5.
  • the magnetic sensor 5 is, for example, a Hall IC.
  • An unsaturated polyester resin is used for the mold resin 23, for example.
  • a thermosetting resin for example, Bulk Molding Compound: BMC
  • BMC Bulk Molding Compound
  • thermoplastic resin such as polybutylene terephthalate (PBT) or polyphenylene sulfide (PPS) may be used.
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • the strength of the stator 2 can be increased. As a result, the stator 2 can be prevented from being deformed due to the exciting force generated in the electric motor 1, and the vibration and noise in the electric motor 1 can be reduced.
  • FIG. 3 is a diagram showing a plurality of split core portions 20a arranged in a line.
  • FIG. 4 is an enlarged view showing the structure of a region E1 indicated by a broken line in FIG.
  • FIG. 5: is a figure which shows the some iron core part 20a arrange
  • FIG. 6 is an enlarged view showing the structure of a region E2 indicated by a broken line in FIG.
  • the stator core 20 is composed of a plurality of split core portions 20a (specifically, 12 split core portions 20a). Each split iron core portion 20a has one yoke 20b and one tooth 20c protruding from the yoke 20b. The split core portions 20a adjacent to each other are connected by the thin portion 20d of the yoke 20b.
  • the coil 21 is wound around each tooth 20c in a state where the twelve divided core parts 20a are arranged in a line. Further, the split core portions 20a are bent into an annular shape.
  • the stator core 20 is composed of a plurality of split core portions 20a, the coil 21 can be wound with the split core portions 20a arranged in a line. As a result, the density of the coil 21 can be increased, which is effective for increasing the efficiency of the electric motor 1.
  • the split core portions 20a are connected by the thin portion 20d of the yoke 20b, the rigidity of the stator core 20 after the split core portions 20a are bent into a ring shape is weak.
  • the structure of the stator core 20 is not limited to the examples shown in FIGS. 2 to 6.
  • the split iron core portions 20a may be connected by an uneven dowel formed on the end portion of the yoke 20b.
  • both ends of the split core portion 20a may be welded, or one end of the split core portion 20a may be fitted to the other end of the split core portion 20a.
  • the mold resin 23 is filled in the divided portion 20e which is a region between two yokes 20b adjacent to each other in the circumferential direction. Thereby, the influence of the vibration force applied to the teeth 20c can be reduced.
  • a hole 20f is formed between two yokes 20b that are adjacent to each other in the circumferential direction.
  • the plurality of holes 20f are formed in the stator core 20.
  • Each hole 20f is adjacent to the division 20e.
  • Each hole 20f extends in the axial direction. In the manufacturing process of the stator 2, when the molding resin 23 is molded around the stator core 20, the molding resin 23 is filled in the holes 20f.
  • the mold resin 23 does not need to be filled in all the regions in each hole 20f. That is, the mold resin 23 may not be filled from one end to the other end in the hole 20f in the axial direction. It suffices that the mold resin 23 is filled in at least one end of the region in the hole 20f in the axial direction. Thereby, the vibration in the electric motor 1 can be damped.
  • the size of the holes 20f and the filling amount of the molding resin 23 are appropriately determined. As shown in FIG. 4, in the xy plane, a part of the hole 20f communicates with the inside of the rotor core 30, specifically, the divided portion 20e, but in the xy plane, a part of the hole 20f is formed. May communicate with the outside of the rotor core 30.
  • FIG. 7 is a sectional view schematically showing the structure of the rotor 3.
  • the rotor 3 is a consequent pole type rotor.
  • one or more permanent magnets are arranged in the rotor core 30 so that one of the N pole and the S pole of the permanent magnet faces the stator 2 of the electric motor 1.
  • the number of permanent magnets 36 arranged in the rotor core 30 is half the number of magnetic poles of the rotor 3.
  • the number of magnetic poles of the consequent pole type rotor is usually an even number of 4 or more.
  • the number of permanent magnets 36 is 2.
  • the region between two permanent magnets 36 adjacent to each other in the circumferential direction functions as an S pole.
  • the rotor 3 has a rotor core 30, one or more permanent magnets 36, a shaft 37 fixed in the rotor core 30, and a resin 38a.
  • the rotor core 30 includes a plurality of cores (specifically, at least one core 31, at least one core 32, and at least one core 33), at least one slit 34, and a through hole 35.
  • the shaft 37 and the resin 38a are arranged in the through hole 35. Specifically, the resin 38 a is filled around the shaft 37. Further, the resin 38 a is filled between the inner peripheral surface of the rotor core 30 and the shaft 37 and between the inner wall of each slit 34 and each permanent magnet 36. As a result, the shaft 37 is integrated with the rotor core 30. Further, since the resin 38a is a non-magnetic resin, it is possible to reduce the magnetic flux flowing from the permanent magnet 36 into the shaft 37, that is, the leakage magnetic flux.
  • At least one iron core 31, at least one iron core 32, and at least one iron core 33 are laminated in the axial direction.
  • the iron core 31, the iron core 32, and the iron core 33 are provided with a caulking portion 39 described later. That is, the iron core 31, the iron core 32, and the iron core 33 are fixed by caulking.
  • the rotor iron core 30 includes an iron core 31 as a first iron core, an iron core 32 as a second iron core, an iron core 33 as a third iron core, and an iron core 32 as a fourth iron core. And an iron core 31 as a fifth iron core. That is, in the example shown in FIG. 7, the structure of the first core is the same as the structure of the fifth core, and the structure of the second core is the same as the structure of the fourth core. However, the rotor core 30 may include cores other than the first to fifth cores.
  • the first iron core, the second iron core, the third iron core, the fourth iron core, and the fifth iron core are the first iron core, the second iron core, the third iron core, the fourth iron core, and the axial iron core.
  • the fifth iron core is laminated in this order.
  • a plurality of slits 34 are formed in the circumferential direction on the xy plane.
  • the length of each slit 34 in the longitudinal direction is longer than the length of the permanent magnet 36 in the longitudinal direction.
  • Each slit 34 extends in the axial direction. That is, each slit 34 passes through the iron core 31, the iron core 32, and the iron core 33.
  • the rotor 3 has a plurality of permanent magnets 36 (specifically, five permanent magnets 36).
  • the plurality of permanent magnets 36 are embedded inside the rotor core 30.
  • each permanent magnet 36 is arranged in each slit 34.
  • the permanent magnets 36 are arranged in the slits 34 formed in the iron core 32 and the iron core 33, and are not arranged in the slits 34 formed in the iron core 31. Thereby, the leakage magnetic flux in the iron core 31 can be reduced.
  • the permanent magnet 36 is, for example, a rare earth magnet.
  • the permanent magnet 36 is, for example, a flat magnet.
  • the permanent magnet 36 is a neodymium sintered magnet containing Nd (neodymium) -Fe (iron) -B (boron).
  • the thickness of one electromagnetic steel plate of the rotor core 30 (that is, the cores 31, 32, and 33) is, for example, 0 to 1 mm to 0.7 mm.
  • FIG. 8 is a diagram schematically showing the structure of the iron core 31.
  • the iron core 31 has at least one slit 34 and at least one crimp portion 39.
  • the number of slits 34 formed in the iron core 31 is half the number of magnetic poles of the rotor 3. That is, in the present embodiment, five slits 34 are formed in iron core 31.
  • the periphery of each slit 34 is surrounded by the electromagnetic steel plate of the iron core 31. In the xy plane, the length of each slit 34 formed in the iron core 31 in the longitudinal direction is longer than the length of the permanent magnet 36 in the longitudinal direction.
  • Iron core 31 is composed of at least one electromagnetic steel plate.
  • iron core 31 is formed by stacking a plurality of electromagnetic steel plates in the axial direction.
  • One electromagnetic steel plate forming each layer of the iron core 31 is not divided into two or more plates. That is, one electromagnetic steel plate forming each layer of the iron core 31 is one integrated plate.
  • Each electromagnetic steel plate of the iron core 31 is formed into a predetermined shape by press working.
  • Each electromagnetic steel plate of the iron core 31 has the same structure.
  • the iron core 31 may include an electromagnetic steel plate having a structure other than the structure shown in FIG.
  • a caulking portion 39 is formed on each electromagnetic steel plate of the iron core 31. That is, the plurality of electromagnetic steel plates of the iron core 31 are fixed by caulking.
  • at least one caulking portion 39 is formed outside the slit 34 in the radial direction, and at least one caulking portion 39 is also formed inside the slit 34 in the radial direction. Furthermore, at least one caulking portion 39 is formed between two slits 34 that are adjacent to each other in the circumferential direction.
  • FIG. 9 is a diagram schematically showing the structure of the iron core 32.
  • the iron core 32 has an inner iron core portion 32a, at least one outer iron core portion 32b, and at least one slit 34. Similar to the iron core 31, the number of slits 34 formed in the iron core 32 is half the number of magnetic poles of the rotor 3. That is, in the present embodiment, five slits 34 are formed in iron core 32. In the xy plane, the length of each slit 34 in the longitudinal direction is longer than the length of the permanent magnet 36 in the longitudinal direction.
  • the inner iron core portion 32a of the iron core 32 as the second iron core is also referred to as a first inner iron core portion
  • the inner iron core portion 32a of the iron core 32 as the fourth iron core is also referred to as a third inner iron core portion
  • the outer iron core portion 32b of the iron core 32 as the iron core is also referred to as a first outer iron core portion
  • the outer iron core portion 32b of the iron core 32 as the fourth iron core is also referred to as a third outer iron core portion.
  • the inner core portion 32a is located inside the slit 34 in the radial direction.
  • the inner core portion 32a is separated from the outer core portion 32b.
  • the inner core portion 32a has at least one recess 321 and at least one protrusion 322 that form the outer edge of the inner core portion 32a in the xy plane.
  • a plurality of concave portions 321 and a plurality of convex portions 322 are alternately formed in the circumferential direction.
  • Each slit 34 is formed between the recess 321 of the inner core 32a and the outer core 32b. Therefore, the outer iron core portion 32b faces the inner iron core portion 32a.
  • the outer iron core portion 32b is located outside the slit 34 in the radial direction. In other words, the outer core portion 32b is separated from the inner core portion 32a.
  • Iron core 32 is composed of at least one electromagnetic steel plate.
  • iron core 32 is configured by stacking a plurality of electromagnetic steel plates in the axial direction.
  • Each electromagnetic steel plate of the iron core 32 is formed into a predetermined shape by press working.
  • Each electromagnetic steel sheet forming each layer of the iron core 32 has the same structure.
  • the iron core 32 may include an electromagnetic steel plate having a structure other than the structure shown in FIG. 9.
  • At least one of the inner core portion 32a and the outer core portion 32b has at least one protrusion 32c facing the permanent magnet 36 in the circumferential direction.
  • protrusions 32c are formed on both the inner core portion 32a and the outer core portion 32b. Specifically, on the xy plane, the protrusions 32c are formed at both ends of each outer core portion 32b in the circumferential direction, and the protrusions 32c are formed at both ends of the recess 321. In other words, the protrusions 32c are formed at both ends in the longitudinal direction of the slit 34 on the xy plane.
  • each protrusion 32c is in contact with the permanent magnet 36. As a result, the position of the permanent magnet 36 is firmly fixed in the slit 34.
  • each protrusion 32c is less than half the thickness of the permanent magnet 36 in the lateral direction. As a result, the outer iron core portion 32b does not contact the inner iron core portion 32a, and the outer iron core portion 32b can be separated from the inner iron core portion 32a.
  • the height of each protrusion 32c is the height in the lateral direction of the permanent magnet 36 in the xy plane.
  • FIG. 10 is a diagram schematically showing the structure of the iron core 33.
  • the iron core 33 has an inner iron core portion 33 a (also referred to as a second inner iron core portion), at least one outer iron core portion 33 b (also referred to as a second outer iron core portion), and at least one slit 34. Similar to the iron cores 31 and 32, the number of slits 34 formed in the iron core 33 is half the number of magnetic poles of the rotor 3. That is, in the present embodiment, five slits 34 are formed in iron core 33. In the xy plane, the length of each slit 34 in the longitudinal direction is longer than the length of the permanent magnet 36 in the longitudinal direction.
  • the inner core portion 33a is located inside the slit 34 in the radial direction.
  • the inner core portion 33a is separated from the outer core portion 33b.
  • the inner core portion 33a has at least one recess 331 and at least one protrusion 332 that form the outer edge of the inner core portion 33a in the xy plane.
  • a plurality of concave portions 331 and a plurality of convex portions 332 are alternately formed in the circumferential direction.
  • Each slit 34 is formed between the recess of the inner core portion 33a and the outer core portion 33b. Therefore, the outer iron core portion 33b faces the inner iron core portion 33a.
  • each slit 34 formed in the iron core 33 communicates with the outside of the rotor 3.
  • both end portions in the longitudinal direction of each permanent magnet 36 arranged in each slit 34 formed in the iron core 33 also communicate with the outside of the rotor 3.
  • the outer iron core portion 33b is located outside the slit 34 in the radial direction. In other words, the outer core portion 33b is separated from the inner core portion 33a.
  • Iron core 33 is composed of at least one electromagnetic steel plate.
  • iron core 33 is formed by stacking a plurality of electromagnetic steel plates in the axial direction.
  • Each electromagnetic steel plate of the iron core 33 is formed into a predetermined shape by press working.
  • Each electromagnetic steel sheet forming each layer of the iron core 33 has the same structure.
  • the iron core 33 may include an electromagnetic steel plate having a structure other than the structure shown in FIG. 10.
  • the rotor 3 has two iron cores 31, two iron cores 32, and one iron core 33.
  • the iron core 31, the iron core 32, and the iron core 33 are laminated in the axial direction in the order of the iron core 31, the iron core 32, and the iron core 33.
  • the iron core 31, the iron core 32, and the iron core 33 are laminated in the order of the iron core 31, the iron core 32, the iron core 33, the iron core 32, and the iron core 31. Therefore, the iron core 32 is arranged between the iron core 31 and the iron core 33, and the iron core 33 is arranged between the two iron cores 32.
  • the projections 32c of the iron cores 32 serve as guides, so that the permanent magnet 36 can be easily inserted into the slit 34.
  • each iron core 31 in the axial direction is indicated by La
  • the thickness of each iron core 32 in the axial direction is indicated by Lb
  • the thickness of the iron core 33 in the axial direction is indicated by Lc.
  • the total thickness L1 of the thickness of the iron core 31 in the axial direction is 2 ⁇ La.
  • the total thickness L2 of the thickness of the iron core 32 in the axial direction is 2 ⁇ Lb.
  • the total thickness L3 of the thickness of the iron core 33 in the axial direction is Lc.
  • the rotor 3 satisfies L1 ⁇ L2 ⁇ L3. Thereby, the leakage magnetic flux in the rotor 3 can be effectively reduced.
  • the rotor core 30 is longer than the stator core 20 in the axial direction.
  • the iron core 31 is arranged at the end of the rotor iron core 30. Further, the iron core 31 does not face the stator iron core 20 in the radial direction. Thereby, the magnetic flux from the permanent magnets 36 arranged in the iron core 32 and the iron core 33 can efficiently pass through the stator iron core 20. As a result, the efficiency of the electric motor 1 can be improved.
  • FIG. 11 is a diagram showing another example of the iron core 31.
  • One of the two iron cores 31 shown in FIG. 7 may have at least one protrusion 31a as shown in FIG.
  • the protrusion 31a is formed on the inner wall of the slit 34 formed in the iron core 31 as the first iron core so as to protrude in the radial direction.
  • the protrusion 31a faces the permanent magnet 36 in the axial direction.
  • the permanent magnet 36 causes the iron core 31 serving as the first iron core 31. It is possible to prevent it from falling from the slit 34.
  • the protrusion 31a may be in contact with the permanent magnet 36 in the axial direction, or may be separated from the permanent magnet 36.
  • the projection 31a is in contact with the permanent magnet 36 in the axial direction, the permanent magnet 36 can be firmly fixed in the slit 34, and the vibration and noise in the electric motor 1 due to the vibration of the permanent magnet 36 can be reduced. it can.
  • the protrusion 31a is separated from the permanent magnet 36, the leakage magnetic flux can be reduced.
  • FIG. 12 is a diagram showing another example of the iron core 32.
  • each outer core portion 32b has at least one protrusion 32c facing the permanent magnet 36 in the circumferential direction. It is desirable that each protrusion 32c is in contact with the permanent magnet 36. As a result, the position of the permanent magnet 36 is firmly fixed in the slit 34. On the other hand, the protrusions 32c are not formed in the recesses 321 of the inner core portion 32a.
  • FIG. 13 is a diagram showing still another example of the iron core 32.
  • the inner core portion 32a has at least one protrusion 32c facing the permanent magnet 36 in the circumferential direction. It is desirable that each protrusion 32c is in contact with the permanent magnet 36. As a result, the position of the permanent magnet 36 is firmly fixed in the slit 34. On the other hand, no protrusion 32c is formed on the outer iron core portion 32b.
  • FIG. 14 and 15 are sectional views schematically showing another example of the rotor 3. Specifically, FIG. 14 is a sectional view taken along line C14-C14 in FIG. 15, and FIG. 15 is a sectional view taken along line C15-C15 in FIG.
  • the rotor 3 shown in FIGS. 14 and 15 has resins 38b and 38c in addition to the resin 38a.
  • the resin 38a is also referred to as a first resin
  • the resin 38b is also referred to as a second resin
  • the resin 38c is also referred to as a third resin.
  • the resins 38a, 38b, and 38c are integrated as shown in FIG. 15, the resins 38a, 38b, and 38c are shown as one resin 38.
  • the rotor core 30 has a first end 30a and a second end 30b in the axial direction.
  • the resin 38a is formed inside the rotor core 30 in the radial direction. Specifically, the resin 38 a is formed around the shaft 37 in the through hole 35.
  • the resin 38b is arranged in the slit 34. Specifically, the resin 38b is arranged in a space adjacent to both ends of each permanent magnet 36 in the longitudinal direction on the xy plane. As shown in FIGS. 14 and 15, the resin 38 b is preferably adjacent to each permanent magnet 36 so as to abut at least one of the plurality of outer surfaces of each permanent magnet 36. The resin 38b may be adjacent to each permanent magnet 36 so as to contact all the outer surfaces of the plurality of outer surfaces of each permanent magnet 36.
  • the resin 38c is formed on the first end 30a of the rotor core 30.
  • the broken line shown in FIG. 15 indicates the boundary between the region where the resin 38c is formed and the region where the resins 38a and 38b are formed.
  • the resins 38a, 38b, and 38c are integrally formed of the same resin material. That is, the resins 38a, 38b, and 38c are a single structure (resin body) molded by integral molding. Therefore, the resins 38a, 38b, and 38c are not structurally separated from each other.
  • the resins 38a, 38b, and 38c are resins containing a nonmagnetic material as a main component, that is, nonmagnetic resin.
  • the resins 38a, 38b, and 38c are thermoplastic resins such as PBT (polybutylene terephthalate) resin and PPS (polyphenylene sulfide) resin.
  • a glass filler may be blended with the resins 38a, 38b, and 38c.
  • the resins 38a, 38b, and 38c may be thermosetting resins formed by BMC (Bulk Molding Compound).
  • the length of the resin 38a in the radial direction be at least three times the gap between the stator 2 and the rotor 3.
  • the length of the resin 38a in the radial direction is preferably 3 times or more the maximum value of the gap between the rotor core 30 (specifically, the core 32 or 33) and the stator 2.
  • the length L4 of the rotor iron core 30 is longer than the length L5 of the permanent magnet 36 in the axial direction. Thereby, the end of the permanent magnet 36 in the axial direction can be covered with the resin 38b.
  • the length L4 is equal to the length from the first end portion 30a to the second end portion 30b of the rotor core 30.
  • FIG. 16 is a sectional view showing another example of the rotor core 30.
  • the arrangement of the plurality of cores of the rotor core 30 is different from that of the rotor core 30 described in the first embodiment.
  • the rotor core 30 shown in FIG. 16 can be applied to the rotor 3 instead of the rotor core 30 shown in FIG. 7.
  • the rotor core 30 includes an iron core 31 as a first iron core, an iron core 32 as a second iron core, an iron core 33 as a third iron core, an iron core 32 as a fourth iron core, and a fifth iron core.
  • the rotor core 30 may include cores other than the first core to the seventh core.
  • the first iron core, the second iron core, the third iron core, the fourth iron core, the fifth iron core, the sixth iron core, and the seventh iron core the first iron core, the second iron core, the third iron core, in the axial direction.
  • the fourth iron core, the fifth iron core, the sixth iron core, and the seventh iron core are laminated in this order.
  • the inner core portion 32a of the iron core 32 as the second iron core is also referred to as a first inner iron core portion
  • the inner iron core portion 33a of the iron core 33 as a third iron core is also referred to as a second inner iron core portion
  • the fourth iron core is also referred to as a third inner core portion
  • the inner core portion 33a of the iron core 33 serving as the fifth iron core is also referred to as a fourth inner core portion
  • 32a is also referred to as a fifth inner core portion.
  • the outer core portion 32b of the iron core 32 as the second iron core is also referred to as a first outer iron core portion
  • the outer iron core portion 33b of the iron core 33 as a third iron core is also referred to as a second outer iron core portion
  • the fourth iron core is also referred to as a third outer core portion
  • the outer core portion 33b of the iron core 33 serving as the fifth iron core is also referred to as a fourth outer core portion
  • 32b is also referred to as a fifth outer core portion.
  • the rotor core 30 includes at least three cores 32.
  • the plurality of iron cores 32 are arranged apart from each other.
  • FIG. 17 is a sectional view showing still another example of the rotor core 30.
  • the arrangement of the plurality of cores of rotor core 30 is different from that of rotor core 30 described in the first embodiment.
  • the rotor core 30 shown in FIG. 17 can be applied to the rotor 3 instead of the rotor core 30 shown in FIG. 7.
  • the rotor core 30 includes an iron core 31 as a first iron core, an iron core 32 as a second iron core, an iron core 33 as a third iron core, an iron core 31 as a fourth iron core, and a fifth iron core.
  • the first iron core, the second iron core, the third iron core, the fourth iron core, the fifth iron core, the sixth iron core, and the seventh iron core the first iron core, the second iron core, the third iron core, in the axial direction.
  • the fourth iron core, the fifth iron core, the sixth iron core, and the seventh iron core are laminated in this order.
  • the inner core portion 32a of the iron core 32 as the second iron core is also referred to as a first inner iron core portion
  • the inner iron core portion 33a of the iron core 33 as a third iron core is also referred to as a second inner iron core portion
  • the fifth iron core is also referred to as a third inner iron core portion
  • the inner iron core portion 32a of the iron core 32 as the sixth iron core is also referred to as a fourth inner iron core portion.
  • the outer iron core portion 32b of the iron core 32 as the second iron core is also referred to as the first outer iron core portion
  • the outer iron core portion 33b of the iron core 33 as the third iron core is also referred to as the second outer iron core portion
  • the fifth iron core is also referred to as the outer iron core portion
  • the outer iron core portion 33b of the iron core 33 is also referred to as a third outer iron core portion
  • the outer iron core portion 32b of the iron core 32 as the sixth iron core is also referred to as a fourth outer iron core portion.
  • the rotor core 30 includes at least three cores 31, and at least one core 31 is arranged between two cores 33. Accordingly, even when the rotor core 30 is long in the axial direction, the permanent magnet 36 can be inserted into the slit 34 at an appropriate position, and the position of the permanent magnet 36 can be determined in the slit 34.
  • a plurality of iron cores 31 are arranged apart from each other.
  • the electromagnetic steel plates forming each layer of the iron core 31 are one integrated plate.
  • FIG. 18 is a flowchart showing an example of the manufacturing process of the rotor 3.
  • step S1 the iron core 31 as the first iron core having the above structure is manufactured. Specifically, at least one slit 34 and a through hole 35 are formed in at least one electromagnetic steel plate by press working (for example, punching). When at least one slit 34 and through hole 35 are formed in each of the plurality of electromagnetic steel plates, these electromagnetic steel plates are laminated in the axial direction while the electromagnetic steel plates are fixed by caulking in the press die. .. As a result, at least one caulked portion 39 is formed on each electromagnetic steel plate of the iron core 31. In step S1, the iron core 31 as the first iron core 31 and the iron core 31 as the fifth iron core 31 may be simultaneously produced.
  • step S2 the iron core 32 as the second iron core having the above structure is manufactured. Specifically, the inner core portion 32a and at least one outer core portion 32b are formed on at least one electromagnetic steel plate by press working (for example, punching). At the same time, the through hole 35 is formed in the inner core portion 32a.
  • the electromagnetic steel sheets are axially moved in the press die while the electromagnetic steel sheets are fixed by caulking. Stack.
  • the iron core 32 as the fourth iron core 32 may be produced at the same time when the iron core 32 as the second iron core is produced.
  • step S3 the iron core 32 as the second iron core is laminated on the iron core 31 as the first iron core.
  • step S4 the iron core 32 as the second iron core is fixed to the iron core 31 as the first iron core by caulking.
  • the inner core portion 32a and at least one outer core portion 32b are fixed to the iron core 31 by caulking.
  • at least one caulked portion 39 is formed on each electromagnetic steel plate of the iron core 31 and the iron core 32.
  • each outer iron core portion 32b is arranged outside the inner iron core portion 32a in the radial direction so that the slit 34 is formed between the inner iron core portion 32a and each outer iron core portion 32b.
  • the outer core portions 32b are arranged outside the slit 34 in the radial direction.
  • step S5 the iron core 33 as the third iron core having the above structure is manufactured.
  • the inner iron core portion 33a and the at least one outer iron core portion 33b are formed on at least one electromagnetic steel sheet by press working (for example, punching).
  • the through hole 35 is formed in the inner core portion 33a.
  • step S6 the iron core 33 as the third iron core is laminated on the iron core 32 as the second iron core.
  • step S7 the iron core 33 as the third iron core is fixed to the iron core 32 as the second iron core by caulking.
  • the inner iron core portion 33a and at least one outer iron core portion 33b are fixed to the iron core 32 by caulking.
  • at least one caulked portion 39 is formed on each electromagnetic steel plate of the iron core 32 and the iron core 33.
  • each outer core portion 33b is arranged outside the inner core portion 33a in the radial direction so that the slit 34 is formed between the inner core portion 33a and each outer core portion 33b.
  • each outer core portion 33b is arranged outside the slit 34 in the radial direction.
  • step S8 the iron core 32 as the fourth iron core is laminated on the iron core 33 as the third iron core.
  • the iron core 32 as the fourth iron core laminated on the iron core 33 may be manufactured in step S2 or step S8.
  • step S9 the iron core 32 as the fourth iron core is crimped and fixed to the iron core 33 as the third iron core.
  • step S10 the iron core 31 as the fifth iron core is laminated on the iron core 32 as the fourth iron core.
  • the iron core 31 as the fifth iron core laminated on the iron core 32 may be produced in step S1 or step S10.
  • step S11 the iron core 31 as the fifth iron core is caulked to the iron core 32 as the fourth iron core.
  • the rotor core 30 shown in FIG. 7 is manufactured.
  • the order of the processing from steps S1 to S11 is not limited to the above example.
  • the iron core 31, the iron core 32, and the iron core 33 may be laminated in the axial direction.
  • step S12 the permanent magnet 36 is inserted into the slit 34.
  • step S13 the shaft 37 is inserted into the through hole 35.
  • step S14 are diagrams showing an example of the molding process of resin 38 (specifically, step S14).
  • the resin 38 that is, the resins 38a, 38b, and 38c
  • the resin 40 is injected into the rotor core 30 from one end side of the rotor core 30.
  • the resin 40 is injected from the resin injection port 41 into the through hole 35.
  • the resin injection port 41 is provided, for example, in a mold formed so as to cover the rotor core 30.
  • the resin injection port 41 is provided, for example, at a position facing the through hole 35. In the example shown in FIGS. 19 and 20, the resin injection port 41 is provided above the through hole 35.
  • the resin 40 by further injecting the resin 40 from the resin injection port 41, the resin 40 gradually overflows from the through hole 35, and the resin 38c is attached to the first end portion 30a of the rotor core 30. While being formed, the slits 34 are filled with the resin 40. As a result, the space around the permanent magnet 36 in the slit 34 is filled with the resin 40 to form the resin 38b.
  • the resin 38c is also formed on the first end portion 30a and the upper portion of the slit 34.
  • the resins 38a, 38b, and 38c are integrally formed of the same resin material (that is, the resin 40).
  • the resins 38a, 38b, and 38c are made of the same resin material, but may be made of a material other than the resin material, for example, a material containing a nonmagnetic material.
  • the rotor 3 can be manufactured by the above process.
  • FIG. 21 is a diagram schematically showing the structure of a rotor 70 which is a consequent pole type rotor as a comparative example.
  • 22 is an enlarged view showing a part of the structure of the rotor shown in FIG. 21 and 22, "N" indicates an N pole, and "S” indicates an S pole.
  • the rotor core 71 of the rotor 70 has a bridge 72 and a bridge 73.
  • the bridge 72 is formed between the slit 75 in which the permanent magnet 74 is arranged and the outer peripheral surface of the rotor core 71, and the bridge 73 is a region between two adjacent slits 75 (that is, salient poles). Is.
  • the magnetic pole outside each permanent magnet 74 is the N pole. That is, the N pole of each permanent magnet 74 faces the stator. Therefore, the bridge 73 serves as the south pole of the rotor 70.
  • the leakage magnetic flux B1 In the rotor 70 according to the comparative example, a part of the magnetic flux from the N pole of each permanent magnet 74, that is, the leakage magnetic flux B1 easily flows through the bridge 72 toward the S pole of the permanent magnet 74. That is, in the rotor 70 according to the comparative example, the leakage magnetic flux B1 is likely to occur.
  • the leakage flux can be reduced by reducing the width of the bridge 72 in the radial direction, but if the width is too small, it becomes difficult to press the electromagnetic steel sheet. Therefore, in general, the smaller the size of the motor and the rotor, the larger the ratio of the size of the bridge 72 to the size of the permanent magnets, and the greater the effect of the leakage flux. As a result, the electric current for increasing the torque of the electric motor is increased, and the electric motor efficiency is reduced.
  • each slit 34 formed in the iron core 33 communicates with the outside of the rotor 3. Furthermore, in the xy plane, both end portions in the longitudinal direction of each permanent magnet 36 arranged in each slit 34 formed in the iron core 33 also communicate with the outside of the rotor 3. Therefore, both ends of each permanent magnet 36 in the longitudinal direction are not in contact with the iron core 33 (specifically, the electromagnetic steel plate).
  • each slit 34 formed in the iron core 32 communicates with the outside of the rotor 3. Further, in the iron core 32, both end portions of each permanent magnet 36 in the longitudinal direction, specifically, a part of each end portion is not in contact with the iron core 32 (specifically, an electromagnetic steel plate).
  • At least one of the inner core portion 32a and the outer core portion 32b of the iron core 32 has at least one protrusion 32c facing the permanent magnet 36 in the circumferential direction.
  • the iron core 31 is arranged at the end of the rotor 3 in the axial direction.
  • the electromagnetic steel plates forming each layer of the iron core 31 are one integrated plate. Therefore, since the iron core 31, the iron core 32, and the iron core 33 are fixed by caulking, the rigidity of the rotor 3 can be maintained. In particular, the iron core 31 contributes to maintaining the rigidity of the entire rotor iron core 30. When the iron cores 31 are arranged on both sides of the iron cores 32 and 33 in the axial direction, the rigidity of the rotor 3 can be further increased.
  • the iron core 31, the iron core 32, and the iron core 33 are fixed by caulking, the assembling accuracy of the rotor iron core 30 can be increased, and the strength of the rotor iron core 30 can be increased. As a result, vibration and noise in the electric motor 1 due to the assembly error can be reduced.
  • the rotor core 30 is integrally formed by stacking a plurality of cores, productivity can be improved.
  • the leakage magnetic flux in the iron core 33 can be effectively reduced. Furthermore, the rotor 3 satisfies L1 ⁇ L2 ⁇ L3. Therefore, since the ratio of the thickness of the iron core 33 in the axial direction is the largest in the rotor iron core 30, the leakage magnetic flux in the rotor 3 can be effectively reduced. Further, as described above, in the iron core 33, the demagnetization of each permanent magnet 36 can be improved, so that the rotor core 30 has the largest thickness ratio of the iron core 33 in the axial direction. By forming the, the demagnetization of each permanent magnet 36 in the rotor 3 can be effectively improved. As a result, the output of the electric motor 1 can be increased.
  • the iron core 31, the iron core 32, and the iron core 33 are laminated in the axial direction in the order of the iron core 31, the iron core 32, and the iron core 33.
  • the iron core 31, the iron core 32, and the iron core 33 are laminated in the order of the iron core 31, the iron core 32, the iron core 33, the iron core 32, and the iron core 31. That is, the two iron cores 32 are arranged apart from each other in the axial direction.
  • the projection 32c of each iron core 32 serves as a guide.
  • the permanent magnet 36 can be easily inserted into the slit 34, and the positional accuracy of the permanent magnet 36 in the slit 34 can be improved.
  • the vibration and noise of the electric motor 1 due to the vibration of the permanent magnet 36 can be reduced.
  • Each slit 34 formed in the iron core 31 is surrounded by the electromagnetic steel plate of the iron core 31, but the permanent magnet 36 is not arranged in the slit 34 formed in the iron core 31. Therefore, the leakage magnetic flux in the iron core 31 can be reduced.
  • each slit 34 formed in the iron core 31 in the longitudinal direction is longer than the length of the permanent magnet 36 in the longitudinal direction. Therefore, the magnetic flux from each permanent magnet 36 (specifically, each permanent magnet 36 arranged in the iron core 32) can be made hard to pass through the iron core 31. As a result, the leakage magnetic flux in the iron core 31 can be further reduced, and the torque of the electric motor 1 can be further increased.
  • the permanent magnet 36 is It is possible to prevent the rotor core 30 (specifically, the slit 34) from coming off.
  • the protrusion 31a of the iron core 31 can determine the position of the permanent magnet 36 in the axial direction. Thereby, in the manufacturing process of the rotor 3, the assembly of the rotor 3 can be facilitated.
  • the projection 31a is in contact with the permanent magnet 36 in the axial direction, the permanent magnet 36 can be firmly fixed in the slit 34, and the vibration and noise in the electric motor 1 due to the vibration of the permanent magnet 36 can be reduced. it can.
  • the protrusion 31a is not in contact with the permanent magnet 36, the leakage magnetic flux can be reduced.
  • the resin 38a is filled between the inner peripheral surface of the rotor core 30 and the shaft 37, and between the inner wall of each slit 34 and each permanent magnet 36.
  • the shaft 37 is integrated with the rotor core 30. Since the resin 38a is a non-magnetic resin, it is possible to effectively reduce the magnetic flux flowing from the permanent magnet 36 into the shaft 37, that is, the leakage magnetic flux.
  • the integrated resin 38 (that is, the resins 38a, 38b, and 38c) covers the rotor core 30 and the permanent magnet 36, the strength of the rotor core 30 can be increased. Further, even when the shaft 37 is a magnetic body, it is possible to prevent the magnetic flux from the permanent magnet 36 from leaking to the shaft 37.
  • the rotor core 30 is longer than the stator core 20 in the axial direction.
  • the iron core 31 is arranged at the end of the rotor iron core 30. Further, the iron core 31 does not face the stator iron core 20 in the radial direction. Therefore, since the permanent magnet 36 is not arranged in the iron core 31, the magnetic flux from the permanent magnets 36 arranged in the iron core 32 and the iron core 33 can efficiently pass through the stator iron core 20. That is, the magnetic force of the permanent magnet 36 can be effectively used, and the efficiency of the electric motor 1 can be increased. Further, since the magnetic flux flowing from the stator 2 into the iron core 31 can be reduced, the efficiency of the electric motor 1 can be further enhanced.
  • the rotor 3 having the above effects can be manufactured.
  • the resins 38a, 38b, and 38c can be integrally formed, so that the strength of the rotor core 30 can be increased.
  • the iron core 31, the iron core 32, and the iron core 33 are fixed by caulking, so that the assembly accuracy of the rotor iron core 30 can be increased and the strength of the rotor iron core 30 can be increased. be able to. As a result, the rotor 3 capable of reducing vibration and noise can be manufactured.
  • the rotor core 30 is manufactured by stacking the core 31, the core 32, and the core 33 in the axial direction, so that the productivity can be improved.
  • FIG. 23 is a diagram schematically showing the structure of fan 60 according to the second embodiment of the present invention.
  • the fan 60 has blades 61 and an electric motor 62 that rotates the blades 61.
  • the fan 60 is also called a blower.
  • the electric motor 62 is the electric motor 1 according to the first embodiment.
  • Blade 61 is fixed to the shaft of electric motor 62 (for example, shaft 37 in the first embodiment).
  • the blades 61 are driven by the electric motor 62.
  • the electric motor 62 is driven, the blades 61 rotate and an air flow is generated. As a result, the fan 60 can blow air.
  • the fan 60 according to the second embodiment since the electric motor 1 described in the first embodiment is applied to the electric motor 62, the same effect as the effect described in the first embodiment can be obtained. As a result, vibration and noise of the fan 60 can be reduced.
  • FIG. 24 is a diagram schematically showing the configuration of the air conditioner 50 according to the third embodiment.
  • the air conditioner 50 according to Embodiment 3 includes an indoor unit 51 as a blower (first blower), a refrigerant pipe 52, and a blower (second blower) connected to the indoor unit 51 via the refrigerant pipe 52. ) As an outdoor unit 53.
  • the indoor unit 51 includes an electric motor 51a (for example, the electric motor 1 according to the first embodiment), a blowing unit 51b that blows air when driven by the electric motor 51a, and a housing 51c that covers the electric motor 51a and the blowing unit 51b.
  • the blower unit 51b has, for example, blades 51d driven by the electric motor 51a.
  • the blades 51d are fixed to the shaft (for example, the shaft 37) of the electric motor 51a and generate an airflow.
  • the outdoor unit 53 includes an electric motor 53a (for example, the electric motor 1 according to the first embodiment), a blower unit 53b, a compressor 54, and a heat exchanger (not shown).
  • the blower unit 53b blows air by being driven by the electric motor 53a.
  • the blower unit 53b has, for example, blades 53d driven by an electric motor 53a.
  • the blades 53d are fixed to the shaft (for example, the shaft 37) of the electric motor 53a and generate an airflow.
  • the compressor 54 includes an electric motor 54a (for example, the electric motor 1 according to the first embodiment), a compression mechanism 54b (for example, a refrigerant circuit) driven by the electric motor 54a, and a housing 54c that covers the electric motor 54a and the compression mechanism 54b.
  • a compression mechanism 54b for example, a refrigerant circuit
  • At least one of the indoor unit 51 and the outdoor unit 53 has the electric motor 1 described in the first embodiment.
  • the electric motor 1 described in the first embodiment is applied to at least one of the electric motors 51a and 53a as the drive source of the blower unit. Further, the electric motor 1 described in the first embodiment may be used as the electric motor 54a of the compressor 54.
  • the air conditioner 50 can perform an operation such as a cooling operation in which cool air is blown from the indoor unit 51, or a heating operation in which warm air is blown.
  • the electric motor 51a is a drive source for driving the blower unit 51b.
  • the blower unit 51b can blow the adjusted air.
  • the air conditioner 50 of the third embodiment since the electric motor 1 described in the first embodiment is applied to at least one of the electric motors 51a and 53a, the same effect as the effect described in the first embodiment can be obtained. Obtainable. As a result, vibration and noise of the air conditioner 50 can be reduced.
  • the electric motor 1 according to the first embodiment as a drive source of the blower (for example, the indoor unit 51), the same effect as the effect described in the first embodiment can be obtained. Thereby, the vibration and noise of the blower can be reduced.
  • the blower including the electric motor 1 according to the first embodiment and the blades (for example, the blades 51d or 53d) driven by the electric motor 1 can be used alone as a device for blowing air. This blower can be applied to devices other than the air conditioner 50.
  • the electric motor 1 according to the first embodiment as a drive source of the compressor 54, the same effect as the effect described in the first embodiment can be obtained. As a result, vibration and noise of the compressor 54 can be improved.
  • the electric motor 1 described in the first embodiment can be applied to a drive source for a fan, a compressor 54, and an air conditioner 50, as well as a blower, a ventilation fan, an electric home appliance, or a machine tool.

Landscapes

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

Abstract

La présente invention concerne un rotor (3) comportant des noyaux (31), (32), (33). Le noyau (31) comporte une fente (34). Le noyau (32) comporte la fente (34), une partie de noyau côté interne (32a) et une partie de noyau côté externe (32b) séparée de la partie de noyau côté interne (32a). Le noyau (33) comporte la fente (34), une partie de noyau côté interne (33a) et une partie de noyau côté externe (33b) séparée de la partie de noyau côté interne (33a). Les noyaux (31), (32), (33) sont tous stratifiés dans la direction axiale, et au moins l'une de la partie de noyau côté interne (33a) et de la partie de noyau côté externe (33b) possède une saillie (32c) faisant face à un aimant permanent (36) dans la direction circonférentielle.
PCT/JP2018/040332 2018-10-30 2018-10-30 Rotor à pôles conséquents, moteur électrique, ventilateur, dispositif de réfrigération et de climatisation ainsi que procédé de fabrication de rotor à pôles conséquents WO2020090007A1 (fr)

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JP2020554646A JP6964796B2 (ja) 2018-10-30 2018-10-30 回転子、コンシクエントポール型回転子、電動機、送風機、冷凍空調装置、回転子の製造方法、及びコンシクエントポール型回転子の製造方法
PCT/JP2018/040332 WO2020090007A1 (fr) 2018-10-30 2018-10-30 Rotor à pôles conséquents, moteur électrique, ventilateur, dispositif de réfrigération et de climatisation ainsi que procédé de fabrication de rotor à pôles conséquents

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PCT/JP2018/040332 WO2020090007A1 (fr) 2018-10-30 2018-10-30 Rotor à pôles conséquents, moteur électrique, ventilateur, dispositif de réfrigération et de climatisation ainsi que procédé de fabrication de rotor à pôles conséquents

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022239829A1 (fr) * 2021-05-14 2022-11-17 三菱電機株式会社 Rotor, machine électrique tournante, et procédé de fabrication de machine électrique tournante
US20230024290A1 (en) * 2021-07-02 2023-01-26 Moteurs Leroy-Somer Rotating electrical machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012151970A (ja) * 2011-01-18 2012-08-09 Asmo Co Ltd 磁石埋込型ロータ、及びモータ
JP2013236454A (ja) * 2012-05-08 2013-11-21 Asmo Co Ltd ブラシレスモータ及びブラシレスモータの製造方法
WO2017221341A1 (fr) * 2016-06-22 2017-12-28 三菱電機株式会社 Rotor à pôles conséquents, moteur électrique et climatiseur
WO2018025407A1 (fr) * 2016-08-05 2018-02-08 三菱電機株式会社 Rotor à pôles conséquents, moteur électrique et climatiseur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012151970A (ja) * 2011-01-18 2012-08-09 Asmo Co Ltd 磁石埋込型ロータ、及びモータ
JP2013236454A (ja) * 2012-05-08 2013-11-21 Asmo Co Ltd ブラシレスモータ及びブラシレスモータの製造方法
WO2017221341A1 (fr) * 2016-06-22 2017-12-28 三菱電機株式会社 Rotor à pôles conséquents, moteur électrique et climatiseur
WO2018025407A1 (fr) * 2016-08-05 2018-02-08 三菱電機株式会社 Rotor à pôles conséquents, moteur électrique et climatiseur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022239829A1 (fr) * 2021-05-14 2022-11-17 三菱電機株式会社 Rotor, machine électrique tournante, et procédé de fabrication de machine électrique tournante
JP7481586B2 (ja) 2021-05-14 2024-05-10 三菱電機株式会社 回転子及び回転電機並びに回転電機の製造方法
US20230024290A1 (en) * 2021-07-02 2023-01-26 Moteurs Leroy-Somer Rotating electrical machine

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