WO2020208924A1 - Machine électrique tournante à aimants permanents et son procédé de fabrication - Google Patents

Machine électrique tournante à aimants permanents et son procédé de fabrication Download PDF

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Publication number
WO2020208924A1
WO2020208924A1 PCT/JP2020/004825 JP2020004825W WO2020208924A1 WO 2020208924 A1 WO2020208924 A1 WO 2020208924A1 JP 2020004825 W JP2020004825 W JP 2020004825W WO 2020208924 A1 WO2020208924 A1 WO 2020208924A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
electric machine
core
rotary electric
iron core
Prior art date
Application number
PCT/JP2020/004825
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English (en)
Japanese (ja)
Inventor
貴浩 三澤
興起 仲
一弘 庄野
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 JP2021513496A priority Critical patent/JP7113966B2/ja
Publication of WO2020208924A1 publication Critical patent/WO2020208924A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • 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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures

Definitions

  • the present application relates to a permanent magnet type rotary electric machine and a method for manufacturing a permanent magnet type rotary electric machine.
  • the magnet-embedded type rotor uses less magnet than the magnet surface-arranged type rotating electric machine and is suitable for high-speed rotation. Because of its structure, it is widely used in automobiles, compressors, etc.
  • a plurality of embedded holes for inserting a magnet into the iron core of the rotor and other parts between the embedded holes and the outer peripheral portion of the rotor core The one provided with a magnetic narrowing portion (bridge portion) having a low magnetic flux density is shown (see, for example, Patent Document 1).
  • the present application discloses a technique for solving the above-mentioned problems, and is a permanent magnet type rotary electric machine and a permanent magnet type rotation capable of reducing magnetic flux leakage, having centrifugal force resistance, and increasing torque.
  • the purpose is to provide electric appliances.
  • the method for manufacturing a permanent magnet type rotary electric machine disclosed in the present application is to cover at least one end face of both end faces in the axial direction of the iron core with the space filling when the space filling is filled in the space. It is provided with a filling step of filling the magnet.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows another Example of the iron core of the rotor according to Embodiment 1.
  • FIG. It is a figure which shows the conjugate by Embodiment 3.
  • FIG. 1 is a cross-sectional view showing the concept of a permanent magnet type rotary electric machine 100 (hereinafter, abbreviated as rotary electric machine 100), and only a part of the annular stator 60 is shown.
  • FIG. 2A is a view showing a cross section of the iron core of the rotor according to the first embodiment
  • FIG. 2B is a cross-sectional view taken along the line AA of FIG. 2A.
  • the rotary electric machine 100 includes a 4-pole rotor 50 and a stator 60.
  • the stator 60 has a distributed winding winding in which the armature winding 60C is inserted into a plurality of grooves 60B provided in the stator core 60A.
  • the stator core 60A has a structure in which thin electromagnetic steel sheets are laminated to a predetermined axial length.
  • the iron core 10 is laminated so as to have a predetermined axial length LC (see FIG. 2B) by punching a thin electromagnetic steel plate.
  • the iron core 10 is composed of an inner core 1 having a substantially square shape and an outer core 2 having a substantially eyebrow shape, and in the present embodiment, an example of quadrupole formation is shown.
  • FIG. 2A is a diagram showing an iron core 10, a first permanent magnet 3A and a second permanent magnet 3B, a coupling 4, and an interval filling 5 provided in an interval portion 500 among the four-pole rotors 50. is there.
  • the inner core 1 and the outer core 2 forming the iron core 10 are orthogonal to the X-axis and Y-axis (hereinafter, may be referred to as the magnetic pole center line) passing through the magnetic pole centers of the four poles.
  • the arranged first permanent magnets 3A and second permanent magnets 3B and the first permanent magnets 3A and the second permanent magnets 3B each extend from the opposite peripheral end portions of the coupling toward the outer periphery of the iron core 10. It is mechanically and firmly bonded by the coupling 4 via the spacing portion 500 having a magnetic spacing W of 1 to 2 mm. Further, the interval buried portion 5 provided in the interval portion 500 shown in FIGS. 1 and 2A relaxes the stress applied to the coupling 4 when the rotor 50 is accelerated and decelerated.
  • FIG. 3 is a partially enlarged view showing the inner core 1 for explaining one pole of the punched iron core 10.
  • the magnet installation portion 1S is provided with a paragraph groove 1B having a predetermined depth H from the upper side 1A orthogonal to the Y axis corresponding to the magnetic pole center line and having a length LS. ..
  • a trapezoidal engaging portion 1C having a depth of T0 that engages with the protruding portion 4A of the coupling body 4, which will be described later, is formed in the central portion of the paragraph groove 1B.
  • the upper side 1A extends in the outer peripheral direction of the iron core 10 and has a radius of curvature R1 and is connected to the outer peripheral portion 1D.
  • the outer core 2 shown in FIG. 4 is a central portion of the lower side 2A orthogonal to the Y axis, and engages with the protrusion 4A of the coupling 4 at a portion corresponding to the engaging portion 1C of the inner core 1.
  • a trapezoidal engaging portion 2C having a depth of T0 is formed.
  • the lower side 2A of the outer core 2 extends in the outer peripheral direction of the iron core 10 and has a radius of curvature R2 and is connected to the outer peripheral portion 2D.
  • the outer peripheral portion 2D of the outer core 2 shown in FIG. 4 and the outer peripheral portion 1D of the inner core 1 shown in FIG. 3 both form the outer circumference of the iron core 10.
  • the interval portion 500 extends in the circumferential direction from the side opposite to the side in contact with the coupling 4 of the first permanent magnet 3A and the second permanent magnet 3B with the interval W, and is shown in FIG. A linear spacing portion 500A sandwiched between the straight portions of the upper side 1A of the inner core 1 and the lower side 2A of the outer core 2 in FIG.
  • the space filling 5 has a structure formed in the linear space 500A and the curved space 500B to prevent the space filling 5 from scattering outward in the radial direction against the centrifugal force during rotation of the rotor 50. It has a structure. In the present embodiment, a notch structure is not required in the iron core portion for holding the space-filled material 5, which is advantageous for the magnetic characteristics of the iron core.
  • the coupling body 4, the first permanent magnet 3A, and the second permanent magnet 3B are in surface contact with each other having contact surfaces. Further, the first permanent magnets 3A and the second permanent magnets 3B are in surface contact with the spaced objects 5 with contact surfaces, respectively. Therefore, the contact surfaces firmly hold the rotor 50 against the force in the direction perpendicular to the magnetic pole center line generated during acceleration and deceleration.
  • the first permanent magnet 3A and the second permanent magnet 3B are mounted on the magnet installation portion 1S of the inner core 1, and the protrusion 4A of the coupling 4 is engaged with the engaging portion 1C of the inner core 1.
  • the protrusion 4A of the coupling 4 is engaged with the engaging portion 2C of the outer iron core 2 in contact with the upper surfaces of the first permanent magnet 3A and the second permanent magnet 3B, so that the arrangement as shown in FIG. 2 is formed.
  • the inner core 1 and the outer core 2 are laminated by a special jig so as to have a predetermined axial length LC, and the polarities of the first permanent magnet 3A and the second permanent magnet 3B are alternately N pole and S pole. Are arranged to form four poles.
  • the laminate of the inner core 1 and the outer core 2 may be fixed by using a caulking structure, respectively.
  • a resin material is used for the interval filling 5.
  • a thermoplastic or thermosetting resin material of PPS resin polyphenylene sulfide resin
  • the resin material contains a filler and may be other than the PPS resin material.
  • the forming of the interval filling 5 does not have to be filled, and after forming the interval filling 5 having a single shape, it may be inserted into the space of the interval portion 500 from the axial direction.
  • the binder 4 may be previously molded into the shape shown in FIG. 5 using, for example, the PPS resin, and may be inserted into the iron core 10 laminated in the axial direction with a special jig.
  • the iron core 10 may be laminated and then filled with PPS resin to solidify.
  • the conjugate 4 may be a resin other than the PPS resin, and may be a non-magnetic metal material such as SUS steel (stainless steel) having the shape shown in FIG.
  • FIG. 6 is a cross-sectional view showing another embodiment of the iron core of the rotor according to the first embodiment, and shows a cross-sectional view corresponding to the AA cross section of FIG.
  • the interval padding 5 may be formed so as to cover both uppermost and lowermost axially end surfaces of the iron core 10 with a resin material or the like. That is, the space filling 5 is also formed as the space filling 5C and 5D on both axial end surfaces of the inner core 1 and the outer core 2 constituting the iron core 10.
  • the holding force against the centrifugal force generated during the rotation of the rotor 50 is stronger.
  • the bonded body 4 and the spaced buried object 5 are made of the same resin material, the bonded body 4 may also be integrally formed with the spaced buried object 5 so as to be connected at both end faces in the axial direction of the iron core 10.
  • the space filling 5 may be formed so as to cover the axial end surface of either the uppermost stage or the lowermost stage of the iron core 10.
  • the interval portion 500 extends radially from the first permanent magnet 3A and the second permanent magnet 3B to have a radius of curvature and reaches the outer peripheral portion of the iron core 10. Therefore, it is shown in FIG.
  • the interval portion 500 functions as a magnetic resistance circuit to prevent the leakage magnetic flux LF shown in FIG. 1, and the coupling 4 allows the inner core 1 and the outer side. Since it is connected to the iron core 2, it has a structure that is strong against the centrifugal force of the rotor 50.
  • first permanent magnet 3A and the second permanent magnet 3B shown in FIG. 2 are inserted into the paragraph groove 1B of the inner iron core 1 is shown.
  • the outer core 2 is also provided in the step groove 2B so that the first permanent magnet 3A and the second permanent magnet 3B are sandwiched between the inner core 1 and the outer core 2 and are spaced apart from each other.
  • the interval W of the portions 500 may be configured to extend from the vicinity of the center of the thickness T of the first permanent magnet 3A and the second permanent magnet 3B.
  • the diameter of the rotor 50 is selected according to the rating of the rotary electric machine 100, and the installation portion 1S of the first permanent magnet 3A and the second permanent magnet 3B is set.
  • Another example of arranging the first permanent magnet 3A and the second permanent magnet 3B on the iron core 10 in such a case, and another embodiment of extending in the outer diameter direction with a predetermined distance DS of the interval W accompanying this arrangement example. are shown in FIGS. 8 to 10.
  • FIG. 8 shows that the paragraph groove shape is the same as that of FIG. 7, and the interval W is linearly extended from the side opposite to the portion in contact with the coupling body 4 toward the outside, and has a radius of curvature at the outer peripheral portion. It forms a non-linear spaced padding 5.
  • FIG. 9 shows a paragraph groove 1B similar to that of FIG. 3, and
  • FIG. 10 shows a paragraph groove 2B provided only on the outer iron core 2.
  • the rotor 50 having the shape of any of the interval buried objects 5 can prevent the generation of the leakage flux LF described in FIG. 1 and can obtain a highly efficient rotary electric machine 100.
  • the inner core 1 is substantially square and the outer core 2 is substantially eyebrow-shaped, and the thin electromagnetic steel plate material for punching these can be made of a material having different dimensions, and the yield can be increased. Resource saving by improvement and miniaturization of punching press equipment can be achieved, and manufacturing cost can be reduced.
  • the present application has shown an example of a 4-pole rotor 50, it may be a rotor 50 having another number of poles such as 6 poles. Further, the rotor 50 shows an example in which the arrangement of the first permanent magnet 3A and the second permanent magnet 3B is orthogonal to the magnetic pole center line, but if it is symmetric with the magnetic pole center line, it is angled in a V shape. It may be arranged.
  • 11A, 11B, 12A and 12B are views showing another embodiment of the iron core of the rotor according to the first embodiment, and the first permanent magnet 3A and the second permanent magnet 3B are relative to the magnetic pole center line. It is symmetrical and is arranged at an angle in a V-shape that becomes convex toward the center of rotation.
  • one side surface of the first permanent magnet 3A and the second permanent magnet 3B is in surface contact with the coupling 4 with a contact surface F1, respectively. Further, the other side surfaces of the first permanent magnet 3A and the second permanent magnet 3B are in surface contact with each other with the interval buried portion 5 and the contact surface F2.
  • the contact surfaces F1 and F2 the paragraph grooves 1B and 2B with respect to the force in the direction perpendicular to the magnetic pole generated during the acceleration and deceleration of the rotor 50. It is held firmly. Further, as in the configuration shown in FIG.
  • FIG. 11A an example in which the first permanent magnet 3A and the second permanent magnet 3B are inserted and provided in the paragraph groove 1B of the inner core 1 is shown, but as shown in FIGS. 12A and 12B, the outer core 2 is also provided.
  • the step groove 2B may be provided so as to sandwich the first permanent magnet 3A and the second permanent magnet 3B. Further, also in the examples of FIGS. 12A and 12B, as shown in FIG.
  • the contact surfaces of the first permanent magnets 3A and the second permanent magnets 3B and the coupling 4 and the interval buried object 5 are parallel to the magnetic pole center line. It does not have to be.
  • the interval filling 5 shown in FIGS. 11A, 11B, 12A and 12B has a straight filling portion and a curved filling portion as in FIGS. 1 and 2, but as shown in FIG. Only the straight buried part may be used.
  • the permanent magnet type rotary electric machine is provided with a rotor provided with a permanent magnet in the installation portion and a stator, and the iron cores of the rotor are the inner core and the outer side. It is composed of an iron core, and the inner core and the outer core are connected by a coupling arranged at the center of a magnetic pole, and the permanent magnet is installed between the inner core and the outer core with the coupling interposed therebetween. Spacing portions having a magnetic distance from the circumferential end of the permanent magnet on the opposite side of the coupling toward the outer peripheral direction of the iron core are formed, and a resin-based spacing filling is provided in the spacing. Therefore, magnetic flux leakage is reduced, centrifugal force resistance is provided, and high torque is possible.
  • the coupling and the peripheral end of the permanent magnet on the coupling side are in surface contact with each other, they are strong against the directional force perpendicular to the magnetic pole generated during acceleration and deceleration of the rotor. Is held in.
  • the interval portion has a curved interval portion having a radius of curvature at a portion connected to the outer peripheral portion of the iron core, the interval buried portion can be firmly held without scattering.
  • the spacing portion is connected to the curved spacing portion via a linear spacing portion extending linearly from the combined body, the spacing filling can be firmly held without scattering.
  • the interval portion is connected to the outer peripheral portion of the iron core via the linear interval portion extending linearly from the combined body, the structure of the iron core is simplified, which is advantageous in manufacturing.
  • the combined body forms trapezoidal protrusions on the upper portion and the lower portion thereof, and has the same axial length as the axial length of the iron core, and the protrusions are formed on the outer core and the inner core. Since it engages with the provided engaging portion, the inner core and the outer core can be firmly held.
  • the permanent magnet is composed of a first permanent magnet and a second permanent magnet
  • the installation portion is provided on a line orthogonal to the magnetic pole center line of the iron core, facing the coupling body.
  • the structure of the iron core is simplified and the magnetic characteristics are improved.
  • the installation portion is a paragraph groove provided in each of the inner core and the outer core facing each other, the permanent magnet can be firmly held.
  • the installation portion is a paragraph groove provided in the inner iron core, the permanent magnet can be firmly held.
  • the installation portion is a paragraph groove provided in the outer iron core, the permanent magnet can be firmly held.
  • the permanent magnet is arranged in a V-shape that is symmetrical with respect to the magnetic pole center line and becomes convex toward the center of rotation, the magnetic characteristics are improved.
  • the spaced buried objects are integrally connected so as to cover at least one end face of the axial end faces of the iron core, the holding force against the centrifugal force generated when the rotor rotates is strengthened.
  • the conjugate is made of either a resin material or a non-magnetic metal material, the magnetic characteristics are improved.
  • the combined body is made of a resin material and is connected to the spaced buried object at at least one end surface of the axial end surfaces of the iron core, the holding force against the centrifugal force generated when the rotor rotates is strong. Become.
  • a permanent magnet type rotary electric machine when the interval filling is filled in the interval portion, at least one end surface of both end faces in the axial direction of the iron core is covered with the interval filling. Since the filling step for filling is provided, a permanent magnet type rotary electric machine having a strong holding force against the centrifugal force generated when the rotor rotates can be obtained by a simple manufacturing method.
  • Embodiment 2 Next, the second embodiment will be described.
  • different materials that is, directional and non-directional materials, are used for the thin electromagnetic steel sheets to be used in accordance with the magnetic circuit. You may.
  • the eyebrows-shaped outer core 2 shown in the first embodiment uses a directional thin electromagnetic steel plate having a directionality in the longitudinal direction, that is, the plane direction of the outer core 2 and the direction orthogonal to the magnetic pole center line, and the inner side.
  • the iron core 1 is a non-oriented thin electromagnetic steel plate
  • the rotor 50 is a combination of the outer core 2 and the inner core 1 to prevent the magnetic characteristics of the rotor 50 from becoming non-uniform in the radial direction. , It is possible to further improve the magnetic characteristics.
  • the outer core is a laminated body of electromagnetic steel sheets having a directionality in the plane direction of the outer core and in the direction orthogonal to the magnetic pole center line, so that the magnetic characteristics are improved. Can be improved.
  • FIG. 13 is a diagram showing the conjugate according to the third embodiment, and corresponds to the cross section of the line AA of FIG. 2A.
  • the combined body 40 of the present embodiment has a hollow portion 40G inside, and the hollow portion 40G is surrounded by an end portion 40E provided at the axial end portion and a side portion 40F provided on the side surface.
  • the coupling 40 having the hollow portion 40G is used to form a permanent magnet in which the first permanent magnet 3A and the second permanent magnet 3B are integrated, and the integrated permanent magnet is hollow in the coupling 40. It can be inserted and arranged through the portion 40G, and the magnetic characteristics of the magnetic poles are improved.
  • the combined body has a hollow portion inside, and end portions are provided on both end faces in the axial direction of the combined body.
  • the permanent magnet is an integral permanent magnet penetrating the hollow portion of the coupling, and the installation portion is provided on a line orthogonal to the magnetic pole center line of the iron core so as to face the coupling. Therefore, the magnetic characteristics of the magnetic poles are improved.

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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

Dans la présente invention, un noyau (10) d'un rotor est constitué d'un noyau interne (1) et d'un noyau externe (2). Le noyau interne (1) et le noyau externe (2) sont combinés au moyen d'un corps de combinaison (4) disposé au centre du pôle magnétique. Des aimants permanents (3A, 3B) sont installés entre le noyau interne (1) et le noyau externe (2), entre lesquels est intercalé le corps de combinaison (4). Une partie entrefer (500) est formée, laquelle présente un entrefer magnétique (W) partant d'une extrémité dans la direction circonférentielle des aimants permanents (3A, 3B) d'un côté opposé au corps de combinaison (4) vers la direction circonférentielle externe du noyau (11). Un matériau de remplissage d'entrefer résineux (5) est placé dans la partie entrefer (500).
PCT/JP2020/004825 2019-04-11 2020-02-07 Machine électrique tournante à aimants permanents et son procédé de fabrication WO2020208924A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021513496A JP7113966B2 (ja) 2019-04-11 2020-02-07 永久磁石型回転電機および永久磁石型回転電機の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019075426 2019-04-11
JP2019-075426 2019-04-11

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WO2020208924A1 true WO2020208924A1 (fr) 2020-10-15

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0711859U (ja) * 1993-07-19 1995-02-21 株式会社安川電機 永久磁石形同期電動機のロータ
JP2006352973A (ja) * 2005-06-14 2006-12-28 Hitachi Appliances Inc 電動機の回転子及び電動機
JP2014079044A (ja) * 2012-10-09 2014-05-01 Denso Corp 積層鋼板の製造方法、および、積層鋼板
JP2015226371A (ja) * 2014-05-27 2015-12-14 富士電機株式会社 永久磁石埋め込み式回転電機
JP2017112705A (ja) * 2015-12-16 2017-06-22 富士電機株式会社 永久磁石式回転電機及びその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5412978B2 (ja) 2009-06-17 2014-02-12 株式会社明電舎 永久磁石埋込式回転電機
JP5447418B2 (ja) 2011-03-28 2014-03-19 株式会社豊田自動織機 回転電機の永久磁石埋設型回転子及び回転電機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0711859U (ja) * 1993-07-19 1995-02-21 株式会社安川電機 永久磁石形同期電動機のロータ
JP2006352973A (ja) * 2005-06-14 2006-12-28 Hitachi Appliances Inc 電動機の回転子及び電動機
JP2014079044A (ja) * 2012-10-09 2014-05-01 Denso Corp 積層鋼板の製造方法、および、積層鋼板
JP2015226371A (ja) * 2014-05-27 2015-12-14 富士電機株式会社 永久磁石埋め込み式回転電機
JP2017112705A (ja) * 2015-12-16 2017-06-22 富士電機株式会社 永久磁石式回転電機及びその製造方法

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