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WO2018138806A1 - Rotor et machine électrodynamique - Google Patents

Rotor et machine électrodynamique Download PDF

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Publication number
WO2018138806A1
WO2018138806A1 PCT/JP2017/002565 JP2017002565W WO2018138806A1 WO 2018138806 A1 WO2018138806 A1 WO 2018138806A1 JP 2017002565 W JP2017002565 W JP 2017002565W WO 2018138806 A1 WO2018138806 A1 WO 2018138806A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic pole
rotor
magnet insertion
permanent magnet
rotor core
Prior art date
Application number
PCT/JP2017/002565
Other languages
English (en)
Japanese (ja)
Inventor
智也 内村
信一 山口
将太 伊藤
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 CN201780078043.3A priority Critical patent/CN110089006B/zh
Priority to PCT/JP2017/002565 priority patent/WO2018138806A1/fr
Priority to JP2017550790A priority patent/JP6355859B1/ja
Priority to KR1020197017326A priority patent/KR102093242B1/ko
Priority to TW106115772A priority patent/TWI643430B/zh
Publication of WO2018138806A1 publication Critical patent/WO2018138806A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to a rotor provided with a rotor core and a rotating electrical machine.
  • a rotor having a step skew structure As a structure for reducing cogging torque in an embedded magnet type rotating electric machine in which a permanent magnet is embedded in a rotor core, a rotor having a step skew structure is known. However, since the rotor having the step skew structure has a complicated configuration, there is a problem that the manufacturing time is long and the productivity is low.
  • the present invention has been made in view of the above, and an object thereof is to obtain a rotor capable of reducing cogging torque without complicating the structure.
  • the rotor of the present invention is inserted into each of a rotor core in which a plurality of magnet insertion holes are formed for one magnetic pole and a plurality of magnet insertion holes.
  • a line connecting the central axis of the rotor core and the magnetic pole center of the magnetic pole, and the magnet insertion hole is symmetrical with respect to the magnetic pole central plane parallel to the axial direction of the central axis.
  • the permanent magnets are arranged in the axial direction so as to be asymmetric with respect to the axial center plane that is formed in the circumferential direction, passes through the center of the central axis in the axial direction, and is orthogonal to the magnetic pole center plane.
  • the rotor according to the present invention has the effect of reducing the cogging torque without complicating the structure.
  • Axial vertical sectional view of a rotating electrical machine provided with the rotor according to the first embodiment A skeleton perspective view showing an arrangement state of permanent magnets corresponding to one magnetic pole among a plurality of magnetic poles formed on the rotor shown in FIG. The figure which shows the state which has arrange
  • Skeleton perspective view showing arrangement state of permanent magnet corresponding to one magnetic pole among a plurality of magnetic poles formed on rotor according to embodiment 3
  • FIG. 1 is a cross-sectional view perpendicular to the axis of a rotating electrical machine including the rotor according to the first embodiment.
  • a rotating electrical machine 100 illustrated in FIG. 1 includes a stator 1 and a rotor 2 provided inside the stator 1.
  • the rotor 2 includes a rotor core 3, a shaft 4 provided on the rotor core 3, and a plurality of permanent magnets 5.
  • the axial direction of the central axis AX of the rotor core 3 is simply referred to as “axial direction”
  • the radial direction of the rotor core 3 is simply referred to as “radial direction”
  • the circumferential direction of the rotor core 3 is simply referred to as “circumferential direction”. It is called “direction”.
  • the rotor core 3 is configured by laminating a plurality of thin plates punched in an annular shape from a magnetic steel sheet base material (not shown) in the axial direction.
  • the plurality of thin plates are fixed to each other by caulking, welding, or bonding.
  • a gap is secured between the rotor core 3 and the stator 1.
  • the shaft 4 is fixed to the axial center portion of the rotor core 3 by shrink fitting, cold fitting or press fitting.
  • a plurality of magnet insertion holes 6 are formed in the rotor core 3. Each of the plurality of magnet insertion holes 6 is arranged along the circumferential direction D1. The magnet insertion holes 6 adjacent in the circumferential direction D1 are separated from each other.
  • the rotor 2 includes 20 permanent magnets 5, and 10 magnetic poles 7 are formed on the rotor 2.
  • One magnetic pole 7 is formed by a set of permanent magnets 5 inserted into each of two magnet insertion holes 6 adjacent in the circumferential direction D1.
  • the set of the plurality of permanent magnets 5 is arranged so that different polarities are alternated along the circumferential direction D1, and is magnetized so that the magnetization orientation direction is the radial direction.
  • FIG. 2 is a skeleton perspective view showing an arrangement state of permanent magnets corresponding to one magnetic pole among a plurality of magnetic poles formed on the rotor shown in FIG.
  • the permanent magnet 5 that forms one magnetic pole 7 is constituted by a first permanent magnet 5U and a second permanent magnet 5D.
  • a magnet insertion hole 6 is formed in the rotor core 3.
  • the magnet insertion hole 6 includes a first magnet insertion hole 61 into which the first permanent magnet 5U is inserted, and a second magnet insertion hole 62 into which the second permanent magnet 5D is inserted.
  • Each of the first magnet insertion hole 61 and the second magnet insertion hole 62 is formed in a rectangular parallelepiped shape and is formed near the outer peripheral surface 31 of the rotor core 3.
  • Each of the first magnet insertion hole 61 and the second magnet insertion hole 62 penetrates from the one end surface 32 to the other end surface 33 in the axial direction of the rotor core 3.
  • the axial direction of the rotor core 3 is the direction indicated by the arrow D2 in FIG.
  • Each of the first magnet insertion hole 61 and the second magnet insertion hole 62 is arranged adjacent to each other in the circumferential direction D1.
  • the first magnet insertion hole 61 and the second magnet insertion hole 62 are formed symmetrically with respect to the magnetic pole center plane SV.
  • the magnetic pole center plane SV includes a line 8 connecting the central axis AX of the rotor core 3 and the magnetic pole center 71 in the circumferential direction D1 of the rotor core 3, and is a plane parallel to the axial direction D2 of the central axis AX. .
  • the magnetic pole center 71 is located on a line 9 that bisects the width of the outer peripheral surface 31 of the magnetic pole 7 in the circumferential direction D1.
  • the first permanent magnet 5U inserted into the first magnet insertion hole 61 is disposed near the one end face 32 of the rotor core 3, and the second permanent magnet 5D inserted into the second magnet insertion hole 62 is The rotor core 3 is disposed near the other end surface 33.
  • the width from the one end surface 32 to the other end surface 33 of the rotor core 3 in the axial direction D2 is Lr
  • the width obtained by dividing the width Lr into two is Lr / 2
  • the width of the first permanent magnet 5U in the axial direction D2 is
  • Lmu and the width of the second permanent magnet 5D in the axial direction D2 are Lmd
  • each of the width Lmu and the width Lmd is equal to the width Lr / 2.
  • the width Lr is equal to a length obtained by doubling each of the width Lmu and the width Lmd.
  • the first permanent magnet 5U and the second permanent magnet 5D are arranged in the circumferential direction D1 so as to be asymmetric with respect to the magnetic pole center plane SV, and the lamination direction of the rotor core 3, that is, the axial direction. It arrange
  • the first permanent magnet 5U and the second permanent magnet 5D are arranged point-symmetrically with respect to the intersection line CL between the magnetic pole center plane SV and the axial center plane SH.
  • the axial center plane SH is a plane that passes through the center 72 in the axial direction D2 of the central axis AX of the rotor core 3 and is orthogonal to the magnetic pole center plane SV, and includes the axial center 34.
  • the permanent magnets 5 can be arranged in a step-skew shape, and an equivalent skew effect can be obtained in any rotation direction of the rotor 2, so that an equivalent cogging torque reduction effect can be obtained in any rotation direction. Is obtained. Therefore, the cogging torque can be reduced with a simple structure without adopting a complicated manufacturing method in which a plurality of rotating cores are stacked while being shifted in the circumferential direction D1.
  • the permanent magnets are arranged symmetrically in the circumferential direction with respect to the center of the magnetic poles in the circumferential direction of the rotor. Cannot be formed.
  • the rotor 2 according to the first embodiment can form one magnetic pole by two permanent magnets arranged in a skew and has a large step skew angle, and therefore has a structure compared to the rotor of Patent Document 1. The manufacturing cost can be reduced and the cogging torque reduction effect can be enhanced.
  • an equivalent skew effect can be obtained in any rotational direction, and therefore an equivalent cogging torque reduction effect can be obtained in any rotational direction. Therefore, with the rotor 2 according to the first embodiment, it is possible to obtain a rotating electrical machine 100 that is particularly suitable for products such as servo motors and electric power steering.
  • the position of the end face of the first permanent magnet 5U in the axial direction D2 coincides with the position of the one end face 32 of the rotor core 3, and the second face in the axial direction D2
  • the end face position of the permanent magnet 5 ⁇ / b> D coincides with the position of the other end face 33 of the rotor core 3.
  • the positions of the first permanent magnet 5U and the second permanent magnet 5D in the axial direction D2 are determined by inserting each permanent magnet into the first magnet insertion hole 61 and the second magnet insertion hole 62, respectively. Can be decided by. Therefore, according to the rotor 2 which concerns on Embodiment 1, the insertion process of the permanent magnet 5 becomes easy, and it can make a manufacturing cost still cheaper.
  • FIG. 3 is a view showing a state in which end plates are arranged on both end faces of the rotor core shown in FIG.
  • the rotor core 3 has an end plate 5a disposed on one end face 32 and the like, as shown in FIG.
  • An end plate 5b disposed on the end surface 33 may be provided.
  • the end plates 5a and 5b are shaped to extend to the center of the rotor core 3 in the radial direction D3.
  • the end plates 5a and 5b protrude from the first permanent magnet 5U and the second permanent magnet 5D. If it is a shape which can prevent, it will not be limited to the example of illustration.
  • the end plates 5a and 5b may be provided with holes for inserting fastening members or through holes through which the shaft 4 shown in FIG. 1 passes.
  • each of the first permanent magnet 5U and the second permanent magnet 5D is only required to be asymmetrically arranged with respect to the magnetic pole center plane SV, the length in the axial direction thereof may be different.
  • the arrangement pattern of the plurality of permanent magnets 5 constituting each of the plurality of magnetic poles 7 formed on the rotor core 3 is the same for each magnetic pole 7. This can most effectively reduce the cogging torque. However, even when the permanent magnet 5 that forms one of the plurality of magnetic poles 7 is disposed asymmetrically with respect to the magnetic pole center plane SV, the cogging torque can be reduced.
  • the cogging torque can be reduced equally in any rotation direction. It becomes a structure.
  • FIG. FIG. 4 is an axial vertical cross-sectional view showing an arrangement state of permanent magnets corresponding to one magnetic pole among a plurality of magnetic poles formed on the rotor according to the second embodiment.
  • FIG. 5 is a skeleton perspective view showing an arrangement state of permanent magnets corresponding to one magnetic pole shown in FIG.
  • the first permanent magnet 5U is inserted into the first magnet insertion hole 61A
  • the second The permanent magnet 5D is inserted into the second magnet insertion hole 62A.
  • a gap 3FB for preventing a magnetic flux short circuit is formed between the first permanent magnet 5U and the first magnet insertion hole 61A. Although not shown in FIG. 4, it is assumed that a similar gap is also formed between the second permanent magnet 5D and the second magnet insertion hole 62A.
  • the first magnet insertion hole 61A and the second magnet insertion hole 62A are formed to be spaced apart from each other in the circumferential direction D1, and are formed symmetrically with respect to the magnetic pole center plane SV.
  • the first magnet insertion hole 61A and the second magnet insertion hole 62A are formed such that the distance between the opposing surfaces 4VL spreads from the central axis AX toward the outer peripheral surface 31 of the rotor core 3A.
  • the first magnet insertion hole 61A and the second magnet insertion hole 62A are formed in a V shape when the surface perpendicular to the central axis AX of the rotor core 3A is viewed in the axial direction.
  • the first permanent magnet 5U and the second permanent magnet 5D are magnetized so that the magnetization orientation direction is the direction indicated by the arrow 41. That is, the first permanent magnet 5U and the second permanent magnet 5D are perpendicular to the opposing surfaces 4VL of the first magnet insertion hole 61A and the second magnet insertion hole 62A in the circumferential direction D1. Magnetized. In the rotor core 3A, the pairs of the first permanent magnet 5U and the second permanent magnet 5D thus magnetized are arranged in the circumferential direction D1 with different polarities alternately.
  • the magnetic flux generated by the first permanent magnet 5U and the second permanent magnet 5D is directed to the outer side in the radial direction of the rotor core 3A as indicated by a wavy arrow 42, avoiding the magnet insertion hole adjacent to the circumferential direction D1, 1 flows into the stator 1 shown in FIG.
  • the angle ⁇ formed by the opposing surfaces 4VL of the first magnet insertion hole 61A and the second magnet insertion hole 62A constituting one magnetic pole 7 is less than 90 °.
  • the first permanent magnet 5U to be inserted into the first magnet insertion hole 61A is disposed near the one end surface 32 of the rotor core 3A, and is inserted into the second magnet insertion hole 62A.
  • the second permanent magnet 5D is disposed near the other end surface 33 of the rotor core 3A.
  • the first permanent magnet 5U and the second permanent magnet 5D are arranged in the circumferential direction D1 so as to be asymmetric with respect to the magnetic pole center plane SV, and are perpendicular to the stacking direction of the rotor core 3, that is, the axial direction D2. It is arranged in the axial direction D2 so as to be asymmetric with respect to the axial center plane SH.
  • the first permanent magnet 5U and the second permanent magnet 5D are arranged point-symmetrically with respect to the intersection line CL.
  • the same effect as that of the rotor 2 according to the first embodiment can be obtained, and the motor torque can be further increased.
  • FIG. FIG. 6 is a skeleton perspective view showing an arrangement state of permanent magnets corresponding to one magnetic pole among a plurality of magnetic poles formed on the rotor according to the third embodiment.
  • one magnetic pole 7 is formed by the first permanent magnet 5U, the second permanent magnet 5D, and the third permanent magnet 5M.
  • the first permanent magnet 5U is inserted into the first magnet insertion hole 61B, and the second permanent magnet 5D is inserted into the second magnet insertion hole 62B.
  • the third permanent magnet 5M is inserted into a third magnet insertion hole 63B formed at the magnetic pole center 71 in the circumferential direction D1.
  • the first magnet insertion hole 61B, the second magnet insertion hole 62B, and the third magnet insertion hole 63B are formed to be spaced apart from each other in the circumferential direction D1, and are formed symmetrically with respect to the magnetic pole center plane SV. ing.
  • the 1st magnet insertion hole 61B, the 2nd magnet insertion hole 62B, and the 3rd magnet insertion hole 63B are the 1st magnet insertion hole 61B, the 3rd magnet insertion hole 63B, and the 2nd with respect to the circumferential direction D1.
  • the magnet insertion holes 62B are arranged in this order.
  • Each of the first magnet insertion hole 61B, the second magnet insertion hole 62B, and the third magnet insertion hole 63B penetrates from the one end surface 32 to the other end surface 33 in the axial direction D2 of the rotor core 3B.
  • Each of the first magnet insertion hole 61B, the second magnet insertion hole 62B, and the third magnet insertion hole 63B is formed in a rectangular parallelepiped shape and is formed near the outer peripheral surface 31 of the rotor core 3B.
  • the first magnet insertion hole 61B and the second magnet insertion hole 62B are formed such that the distance between the opposing surfaces spreads from the central axis AX toward the outer peripheral surface 31 of the rotor core 3B.
  • the third magnet insertion hole 63B is formed inside the first magnet insertion hole 61B and the second magnet insertion hole 62B in the radial direction D3.
  • the first permanent magnet 5U inserted into the first magnet insertion hole 61B is disposed near the one end face 32 of the rotor core 3B
  • the second permanent magnet 5D inserted into the second magnet insertion hole 62B is
  • the rotor core 3B is disposed near the other end surface 33.
  • the third permanent magnet 5M inserted into the third magnet insertion hole 63B is arranged at the axial center 34. That is, the three permanent magnets divided into three in the axial direction D2 are arranged on the upper side, the center side, and the lower side of the rotor core 3B in the axial direction D2.
  • the change in magnetomotive force by the three permanent magnets becomes smooth, and the cogging torque can be further reduced.
  • the first permanent magnet 5U and the second permanent magnet 5D have the same axial length
  • the first permanent magnet 5U, the second permanent magnet 5D, and the second permanent magnet 5D It is not necessary for the three permanent magnets 5M to have the same axial length. Further, since positioning of the third permanent magnet 5M is not easier than the first permanent magnet 5U and the second permanent magnet 5D, the width in the axial direction D2 is equal after the third permanent magnet 5M is inserted.
  • a nonmagnetic spacer (not shown) may be provided in the gap between the third magnet insertion holes 63B, that is, the upper and lower sides of the third permanent magnet 5M. As a result, the positioning accuracy of the third permanent magnet 5M is improved, and the cogging torque reduction effect can be further improved.
  • FIG. 7 is a view showing a first modification of the rotor according to the first embodiment.
  • a first permanent magnet 5U1 and a second permanent magnet 5D1 are used instead of the first permanent magnet 5U and the second permanent magnet 5D shown in FIG.
  • the first permanent magnet 5U1 is composed of permanent magnets 5Ua and 5Ub divided into two in the axial direction D2
  • the second permanent magnet 5D1 is composed of permanent magnets 5Da and 5Db divided into two in the axial direction D2. .
  • the first permanent magnet 5U1 inserted into the first magnet insertion hole 61 is disposed near the one end face 32 of the rotor core 3, and the second permanent magnet 5D1 inserted into the second magnet insertion hole 62 is The rotor core 3 is disposed near the other end surface 33.
  • the width from the one end surface 32 to the other end surface 33 of the rotor core 3 in the axial direction D2 is Lr
  • the width of the first permanent magnet 5U1 in the axial direction D2 is Lmu
  • the second permanent magnet 5D1 in the axial direction D2 When the width is Lmd, each of the width Lmu and the width Lmd is longer than the width Lr / 2 and shorter than the width Lr.
  • 1st permanent magnet 5U1 and 2nd permanent magnet 5D1 are arrange
  • the amount of magnetic flux can be increased while being arranged in a step skew shape, so that the motor torque can be increased while suppressing the cogging torque.
  • FIG. 8 is a diagram showing a second modification of the rotor according to the first embodiment.
  • a first permanent magnet 5U2 and a second permanent magnet 5D2 are used instead of the first permanent magnet 5U and the second permanent magnet 5D shown in FIG.
  • the first permanent magnet 5U2 inserted into the first magnet insertion hole 61 is disposed near the one end surface 32 of the rotor core 3, and the second permanent magnet 5D2 inserted into the second magnet insertion hole 62 is The rotor core 3 is disposed near the other end surface 33.
  • the width from one end surface 32 to the other end surface 33 of the rotor core 3 in the axial direction D2 is Lr
  • the width of the first permanent magnet 5U2 in the axial direction D2 is Lmu
  • the second permanent magnet 5D2 in the axial direction D2 When the width is Lmd, each of the width Lmu and the width Lmd is longer than the width Lr / 2 and shorter than the width Lr.
  • the first permanent magnet 5U2 and the second permanent magnet 5D2 are arranged so that a part thereof overlaps in the circumferential direction D1. According to the rotor 2D shown in FIG. 8, since the amount of magnetic flux can be increased while the arrangement is a step skew shape, the motor torque can be increased while suppressing the cogging torque.
  • the first permanent magnet 5U2 and the second permanent magnet 5D2 have the same dimensions, and the circumferential width Wmu of the first permanent magnet 5U2 is equal to the circumferential width Wmd of the second permanent magnet 5D2.
  • the radial width Tmu of the first permanent magnet 5U2 is equal to the radial width Tmd of the second permanent magnet 5D2.
  • FIG. 9 is a view showing a modification of the rotor according to the third embodiment.
  • a third permanent magnet 5N is used instead of the third permanent magnet 5M shown in FIG.
  • the third permanent magnet 5N is configured by permanent magnets 5Na and 5Nb that are inserted into the third magnet insertion hole 63B and divided into two in the axial direction D2.
  • the width of the third permanent magnet 5N in the axial direction D2 is equal to the width of the rotor core 3 in the axial direction D2.
  • Part of the first permanent magnet 5U and the third permanent magnet 5N in the axial direction D2 is arranged so as to overlap in the circumferential direction D1, and the second permanent magnet 5D and the third permanent magnet 5N are arranged in the circumferential direction D1.
  • FIG. 10 is a cross-sectional view perpendicular to the axis of a rotating electrical machine including the rotor according to Embodiment 4.
  • one magnetic pole 7 is formed by a set of two permanent magnets 5 inserted into two magnet insertion holes 6.
  • the two magnet insertion holes 6 have the same shape as the first magnet insertion hole 61A and the second magnet insertion hole 62A shown in FIG. Therefore, the permanent magnet 5 inserted into each of the two magnet insertion holes 6 is arranged on the upper side in the axial direction and the lower side in the axial direction.
  • the number of magnetic poles 7 of the rotor 2F is 14, and each magnetic pole 7 is arranged in the circumferential direction.
  • the stator 1 has 12 slots with 12 salient poles.
  • the rotating electrical machine 100A provided with the rotor 2F according to the fourth embodiment since the opposing areas of the magnetic poles on the rotor 2F side and the stator 1 side are close, the motor torque can be effectively increased. Therefore, according to the fourth embodiment, it is possible to obtain rotating electric machine 100A having a small cogging torque and a large motor torque.
  • the number of magnet insertion holes formed in the rotor core is two for one magnetic pole.
  • quality variation is suppressed as compared with the case where three or more magnet insertion holes are formed for one magnetic pole, and the yield in manufacturing the rotor core is improved, and one magnetic pole is configured.
  • a skew structure can be obtained while reducing the number of permanent magnets, and cogging torque can be reduced.
  • all permanent magnets used for the rotor core may be configured to have the same shape. With this configuration, the yield is improved as compared to the case where two or more types of permanent magnets having different dimensions are used, and the manufacturing cost of the permanent magnets can be reduced.
  • the rotors according to the first to fourth embodiments may be configured such that all the magnet insertion holes formed in the rotor core have the same shape. This configuration facilitates the installation of the permanent magnet and reduces the manufacturing cost of the rotor as compared with the case where two or more types of magnet insertion holes having different dimensions are formed.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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

Abstract

La présente invention concerne un rotor (2) qui comprend : un noyau de rotor (3) dans lequel une pluralité de trous d'introduction d'aimant (6) sont formés dans un seul pôle magnétique (7) ; et des aimants permanents (5) respectivement introduits dans la pluralité de trous d'introduction d'aimant (6). Les trous d'introduction d'aimant (6) sont formés dans une direction circonférentielle (D1) de façon à être symétriques par rapport à un plan de centre de pôle magnétique (SV) qui comprend une ligne reliant l'axe central (AX) du noyau de rotor (3) et un centre de pôle magnétique (71), et qui est parallèle à la direction (D2) de l'axe central (AX). Les aimants permanents (5) sont disposés dans la direction (D2) de façon à être asymétriques par rapport à un plan de centre axial (SH) qui passe par un centre dans la direction (D2) de l'axe central (AX) et qui est perpendiculaire au plan de centre de pôle magnétique (SV), et les aimants permanents (5) sont positionnés dans la direction circonférentielle (D1) de façon à être asymétriques par rapport au plan de centre de pôle magnétique (SV). Le centre de pôle magnétique (71) est positionné sur une ligne (9) coupant en deux la largeur de la surface périphérique externe (31) du pôle magnétique (71) dans la direction circonférentielle (D1).
PCT/JP2017/002565 2017-01-25 2017-01-25 Rotor et machine électrodynamique WO2018138806A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201780078043.3A CN110089006B (zh) 2017-01-25 2017-01-25 转子及旋转电机
PCT/JP2017/002565 WO2018138806A1 (fr) 2017-01-25 2017-01-25 Rotor et machine électrodynamique
JP2017550790A JP6355859B1 (ja) 2017-01-25 2017-01-25 回転子及び回転電機
KR1020197017326A KR102093242B1 (ko) 2017-01-25 2017-01-25 회전자 및 회전 전기 장치
TW106115772A TWI643430B (zh) 2017-01-25 2017-05-12 轉子及旋轉電機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/002565 WO2018138806A1 (fr) 2017-01-25 2017-01-25 Rotor et machine électrodynamique

Publications (1)

Publication Number Publication Date
WO2018138806A1 true WO2018138806A1 (fr) 2018-08-02

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PCT/JP2017/002565 WO2018138806A1 (fr) 2017-01-25 2017-01-25 Rotor et machine électrodynamique

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JP (1) JP6355859B1 (fr)
KR (1) KR102093242B1 (fr)
CN (1) CN110089006B (fr)
TW (1) TWI643430B (fr)
WO (1) WO2018138806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653267A (zh) * 2019-10-11 2021-04-13 现代自动车株式会社 具有非对称转子芯的马达

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11103543A (ja) * 1997-09-29 1999-04-13 Yaskawa Electric Corp 内磁形モータのロータ構造
JP2003333778A (ja) * 2002-05-15 2003-11-21 Hitachi Ltd 永久磁石式回転電機
JP2006025572A (ja) * 2004-07-09 2006-01-26 Asmo Co Ltd 埋込磁石型モータ
JP2006254599A (ja) * 2005-03-10 2006-09-21 Asmo Co Ltd 埋込磁石型モータ

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06137854A (ja) * 1992-10-27 1994-05-20 Matsushita Electric Works Ltd 三次元形状の検査方法
JP3840892B2 (ja) * 2000-10-30 2006-11-01 株式会社日立製作所 永久磁石式回転電機
JP2007306735A (ja) * 2006-05-12 2007-11-22 Yaskawa Electric Corp 永久磁石モータ
JP2008017633A (ja) * 2006-07-06 2008-01-24 Yaskawa Electric Corp 回転子および埋込磁石型モータ
JP5198178B2 (ja) * 2008-08-06 2013-05-15 株式会社東芝 永久磁石式回転電機及び永久磁石電動機ドライブシステム
JP5493405B2 (ja) * 2009-03-16 2014-05-14 株式会社安川電機 ロータコアの製造方法と、ロータコア、およびロータとこのロータを有する埋込磁石型回転電機
JP5331761B2 (ja) * 2010-08-09 2013-10-30 株式会社日立製作所 永久磁石式回転電機
JP5414900B2 (ja) * 2010-08-27 2014-02-12 三菱電機株式会社 永久磁石埋込型モータの回転子及び圧縮機及び冷凍空調装置
WO2012157056A1 (fr) * 2011-05-16 2012-11-22 三菱電機株式会社 Machine électrique rotative du type à aimants permanents
JP6282795B2 (ja) * 2011-11-10 2018-02-21 日本電産株式会社 モータ
JP5956277B2 (ja) * 2012-08-07 2016-07-27 山洋電気株式会社 永久磁石式モータ、および永久磁石式モータの製造方法
JP2015208053A (ja) * 2014-04-17 2015-11-19 日立アプライアンス株式会社 永久磁石式回転電機及びそれを用いた圧縮機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11103543A (ja) * 1997-09-29 1999-04-13 Yaskawa Electric Corp 内磁形モータのロータ構造
JP2003333778A (ja) * 2002-05-15 2003-11-21 Hitachi Ltd 永久磁石式回転電機
JP2006025572A (ja) * 2004-07-09 2006-01-26 Asmo Co Ltd 埋込磁石型モータ
JP2006254599A (ja) * 2005-03-10 2006-09-21 Asmo Co Ltd 埋込磁石型モータ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653267A (zh) * 2019-10-11 2021-04-13 现代自动车株式会社 具有非对称转子芯的马达

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