WO2022107713A1 - Procédé de fabrication de moteur et de stator - Google Patents

Procédé de fabrication de moteur et de stator Download PDF

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Publication number
WO2022107713A1
WO2022107713A1 PCT/JP2021/041863 JP2021041863W WO2022107713A1 WO 2022107713 A1 WO2022107713 A1 WO 2022107713A1 JP 2021041863 W JP2021041863 W JP 2021041863W WO 2022107713 A1 WO2022107713 A1 WO 2022107713A1
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WO
WIPO (PCT)
Prior art keywords
stator
flat plate
shaped member
teeth
stator sheet
Prior art date
Application number
PCT/JP2021/041863
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English (en)
Japanese (ja)
Inventor
浩威 西野
光生 児玉
Original Assignee
ミネベアミツミ株式会社
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 ミネベアミツミ株式会社 filed Critical ミネベアミツミ株式会社
Priority to JP2022563736A priority Critical patent/JPWO2022107713A1/ja
Publication of WO2022107713A1 publication Critical patent/WO2022107713A1/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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles

Definitions

  • the present invention relates to a method for manufacturing a motor and a stator.
  • a technique in which a stator core constituting a stator is formed from a core back and a plurality of teeth portions separated in the circumferential direction.
  • One aspect is to provide a method of manufacturing a motor and a stator that can improve efficiency.
  • the motor comprises a rotor having a magnet and a stator facing the rotor.
  • the stator includes an annular core back portion and a teeth portion formed by laminating a plurality of plate materials.
  • the plurality of plate members include a first flat plate-shaped member and a second flat plate-shaped member.
  • the teeth portion is composed of the second flat plate-shaped member.
  • the first flat plate-shaped member is arranged at the end of the teeth portion.
  • efficiency can be improved.
  • FIG. 1 is a plan view showing an example of the first stator sheet in the embodiment.
  • FIG. 2 is a plan view showing an example of the second stator sheet in the embodiment.
  • FIG. 3 is a plan view showing an example of the first stator sheet to which the second stator sheet is joined in the embodiment.
  • FIG. 4 is a perspective view showing an example of the stack assembly in the embodiment.
  • FIG. 5 is a cross-sectional view showing an example of the stack assembly in the embodiment.
  • FIG. 6 is a perspective view showing an example of the assembly process of the stator coil assembly in the embodiment.
  • FIG. 7 is a perspective view showing an example of a stator coil assembly to which an inner insulator is attached according to the embodiment.
  • FIG. 1 is a plan view showing an example of the first stator sheet in the embodiment.
  • FIG. 2 is a plan view showing an example of the second stator sheet in the embodiment.
  • FIG. 3 is a plan view showing an example of the first stator sheet to which the second stator sheet
  • FIG. 8 is a perspective view showing an example of a stator coil assembly to which a coil is attached according to the embodiment.
  • FIG. 9 is a perspective view showing an example of a stator coil assembly to which an outer insulator is attached according to the embodiment.
  • FIG. 10 is a perspective view showing an example of the stator assembly process in the embodiment.
  • FIG. 11 is a perspective view showing an example of the stator in the embodiment.
  • FIG. 12 is a plan view showing an example of a punching process of the first stator sheet in the embodiment.
  • FIG. 13 is a cross-sectional view showing an example of the motor in the embodiment.
  • FIG. 14 is a cross-sectional view showing an example of the positional relationship between the stator sheet and the magnet in the embodiment.
  • FIG. 15 is an enlarged cross-sectional view showing an example of the positional relationship between the stator sheet and the magnet in the embodiment.
  • FIG. 16 is a perspective view showing an example of the first stator sheet in the modified example.
  • FIG. 17 is an exploded perspective view showing an example of the stack assembly in the modified example.
  • FIG. 18 is a perspective view showing an example of the stack assembly in the modified example.
  • FIG. 19 is a perspective view showing an example of the stator coil assembly in the modified example.
  • FIG. 20 is a perspective view showing an example of a stator coil assembly to which an outer peripheral ring is attached in a modified example.
  • the stack assembly SA constituting the stator ST is formed by laminating a plurality of second stator sheets 20 shown in FIG. 2 on the first stator sheet 10 shown in FIG. 1 in the axial direction.
  • the first stator sheet 10 is an example of a first flat plate-shaped member
  • the second stator sheet 20 is an example of a plurality of flat plate-shaped members and a second flat plate-shaped member.
  • FIG. 1 is a plan view showing an example of the first stator sheet in the embodiment.
  • FIG. 2 is a plan view showing an example of the second stator sheet in the embodiment.
  • the first stator sheet 10 in the embodiment is a flat plate-shaped member made of a non-magnetic material such as resin.
  • the thickness of the first stator sheet 10 is, for example, about 1.0 mm.
  • the first stator sheet 10 includes a substantially circular central portion 15 and a plurality of projecting portions 11 protruding in the radial direction from the outer periphery of the central portion 15.
  • FIG. 1 describes the first stator sheet 10 having six protrusions 11, the number of protrusions 11 is not limited to this.
  • a plurality of hole portions 16 and a plurality of notched portions 17 are formed between the central portion 15 and the protruding portion 11.
  • the plurality of holes 16 and the plurality of notches 17 are formed, for example, at equal intervals in the circumferential direction.
  • the plurality of protruding portions 11 are formed at equal intervals in the circumferential direction.
  • a plurality of caulking portions 12 and 13 and an arc-shaped portion 14 formed so as to face the central portion 15 are formed in each protruding portion 11.
  • the second stator sheet 20 in the embodiment is a flat plate-shaped member made of a magnetic material such as a magnetic steel plate.
  • the second stator sheet 20 is formed of, for example, a magnetic material having a thickness of about 0.5 mm. That is, in the embodiment, the thickness of the first stator sheet 10 made of resin or the like is formed to be slightly larger than the thickness of the second stator sheet 20 in order to secure the rigidity.
  • the first stator sheet 10 may be formed by using a magnetic material like the second stator sheet 20, but a non-magnetic material such as a resin is used in consideration of suppressing iron loss, which will be described later. Is preferable.
  • the second stator sheet 20 includes a protruding portion 21 and an arc-shaped portion 24.
  • the protruding portion 21 is formed with, for example, a plurality of caulking portions 22 and 23 which are boss portions protruding in the axial direction.
  • the plurality of caulking portions 22, 23 are formed at positions facing each other in the axial direction with the caulking portions 12, 13 of the first stator sheet 10, respectively.
  • a fitting portion 25 is further formed in the vicinity of the tip portion on the outer diameter side of the protruding portion 21 in the radial direction.
  • FIG. 3 is a plan view showing an example of the first stator sheet to which the second stator sheet is joined in the embodiment.
  • FIG. 3 shows a state in which one second stator sheet 20 is laminated on the first stator sheet 10 as viewed from above in the axial direction.
  • each second stator sheet 20 is laminated on any one of the protruding portions 11 of the first stator sheet 10.
  • the caulked portion 22 of the second stator sheet 20 is fixed to the caulked portion 12 of the first stator sheet 10 by caulking.
  • the caulked portion 23 of the second stator sheet 20 is fixed to the caulked portion 13 of the first stator sheet 10 by caulking.
  • the second stator sheet 20 and the first stator sheet 10 are fixed so that the projecting portion 11 and the projecting portion 21, and the arc-shaped portion 14 and the arc-shaped portion 24 are overlapped with each other in the top view.
  • the number and shape of the caulked portions are not limited to those shown in the figure, by providing a plurality of caulked portions, it is possible to suppress the positional deviation and rotation between the first stator sheet 10 and the second stator sheet 20.
  • the second stator sheet 20 is similarly fixed to the other protruding portion 11 of the first stator sheet 10. Further, the second stator sheet 20 is further laminated and fixed to another second stator sheet 20 which is directly or indirectly fixed to the first stator sheet 10. By repeating the stacking of the second stator sheets 20 in this way, the stack assembly SA as shown in FIGS. 4 and 5 is formed.
  • FIG. 4 is a perspective view showing an example of the stack assembly in the embodiment.
  • FIG. 5 is a cross-sectional view showing an example of the stack assembly in the embodiment.
  • FIG. 5 shows a cross section cut along the line AA of FIG.
  • the stack assembly SA in the embodiment is formed by laminating a plurality of second stator sheets 20 on the six protrusions 11 of the first stator sheet 10.
  • the second stator sheet 20 laminated on the six protrusions 11 constitutes the teeth Ta to Tf, respectively.
  • the teeth Ta to Tf are expressed without distinction, they may be referred to as the teeth portion TT.
  • the second stator sheet 20 constituting the teeth Ta is in contact with each of the laminated second stator sheets 20 constituting the other teeth Tb to Tf separated in the circumferential direction.
  • the teeth Ta is indirectly connected to other teeth Tb to Tf separated in the circumferential direction via the central portion 15 of the first stator sheet 10.
  • the stack assembly SA is composed of the teeth Ta to Tf and the first stator sheet 10.
  • FIG. 6 is a perspective view showing an example of the assembly process of the stator coil assembly in the embodiment.
  • FIG. 6 shows a configuration in which the inner insulator 31, the coil 40, and the outer insulator 32 are attached to the teeth Tb to Tf but not to the teeth Ta in the assembly process of the stator coil assembly CA.
  • FIG. 7 is a perspective view showing an example of a stator coil assembly to which an inner insulator is attached according to the embodiment.
  • the inner insulator 31 constitutes the insulator 30 together with the outer insulator 32.
  • the inner insulator 31 is attached to the stack assembly SA from the outside in the radial direction.
  • FIG. 8 is a perspective view showing an example of a stator coil assembly to which a coil is attached according to the embodiment.
  • the coil 40 is composed of, for example, a flat wire and is prewound before being mounted on the stack assembly SA. Further, both ends of the flat wire wound around the coil 40 are drawn out as lead wires 41.
  • the coil 40 is mounted on the stack assembly SA from the outside in the radial direction via the inner insulator 31.
  • FIG. 9 is a perspective view showing an example of a stator coil assembly to which an outer insulator is attached according to the embodiment.
  • the outer insulator 32 is attached to the stack assembly SA from the outside in the radial direction so as to be inserted between the stack assembly SA and the coil 40.
  • the stator coil assembly CA is configured by mounting the insulator 30 and the coil 40 on each of the teeth Ta to Tf and the first stator sheet 10 constituting the stack assembly SA.
  • the teeth Ta to Tf and the first stator sheet 10 constituting the stack assembly SA in the embodiment do not have a portion protruding in the circumferential direction on the outer side in the radial direction.
  • the inner insulator 31, the outer insulator 32, and the wound coil 40 can be mounted from the outside in the radial direction.
  • the configuration for attaching the insulator and the coil is not limited to this, for example, the insulator is attached from the upper side and the lower side in the axial direction of the stack assembly SA, and the coil is wound around the stack assembly SA via the insulator. You may.
  • FIGS. 10 and 11 the stator coil assembly CA constitutes the stator ST by being mounted on the stator ring 50 which is the core back portion.
  • FIG. 10 is a perspective view showing an example of the stator assembly process in the embodiment.
  • FIG. 11 is a perspective view showing an example of the stator in the embodiment.
  • the stator ring 50 shown in FIG. 10 is formed by laminating a plurality of rings manufactured by pressing a steel plate such as an electromagnetic steel plate in the axial direction.
  • a plurality of fitting grooves 51 are formed on the inner peripheral side of the stator ring 50 in the radial direction at positions facing each of the teeth Ta to Tf.
  • the stator ring 50 is mounted on the stator coil assembly CA. At that time, the fitting portion 25 of each tooth Ta to Tf is fitted into the fitting groove 51 formed in the stator ring 50, respectively. Further, the stator coil assembly CA and the stator ring 50 are fixed so as not to have a gap by, for example, an adhesive, but the present invention is not limited to this, and the stator coil assembly CA and the stator ring 50 may be fixed by other methods such as welding.
  • stator coil assembly CA is fixed to the stator ring 50 formed so as to guarantee the roundness while maintaining the roundness, so that the roundness of each teeth Ta to Tf can be maintained.
  • the teeth Ta to Tf are indirectly connected via the first stator sheet 10, so that the teeth Ta to Tf are connected to each other indirectly.
  • the roundness of is secured by the first stator sheet 10 to which the second stator sheet 20 is fixed. Therefore, it is possible to reduce the value of roundness and improve the performance, it is possible to bring the value of the torque generated with respect to the current close to the ideal value, and improve the efficiency of the motor. Can be done.
  • FIG. 12 is a plan view showing an example of a punching process of the first stator sheet in the embodiment.
  • the central portion 15 of the first stator sheet 10 is punched out to form an opening 19 in the first stator sheet 10.
  • the plurality of holes 16 and the plurality of notches 17 shown in FIG. 1 function as perforations when separating the central portion 15 and the protruding portion 11, so that the central portion 15 can be easily projected. It can be separated from the portion 11.
  • each of the teeth Ta to Tf becomes an independent component from each other, but since each of the teeth Ta to Tf is fixed to the stator ring 50, deterioration of the roundness of the stack assembly SA is suppressed.
  • the convex portion 18 may remain on each tooth Ta to Tf, that is, a part of the first stator sheet 10 may protrude inward in the radial direction from the second stator sheet 20. be.
  • the area of the first stator sheet 10 is larger than the area of the second stator sheet 20. At this time, it is possible to secure a clearance when punching out the first stator sheet 10, which facilitates manufacturing.
  • FIG. 13 is a cross-sectional view showing an example of the motor in the embodiment.
  • the rotor 70 is inserted into the opening 19 formed by punching out the central portion 15 of the first stator sheet 10.
  • the rotor 70 is rotatably supported by, for example, the shaft 80.
  • a plurality of magnets 71 are arranged on the outer peripheral surface of the rotor 70.
  • the magnet 71 is a permanent magnet such as neodymium sintered.
  • the stack assembly SA including the laminated teeth TT is formed so as to be longer than the magnet 71 in the axial direction as shown in FIGS. 14 and 15, but the magnet 71 shown in FIG. 15 is formed.
  • the end portion 7a in the axial direction of the tooth TT is arranged so as to face the second stator sheet 20 made of a magnetic material, not the first stator sheet 10 arranged at the end portion in the axial direction of the teeth TT.
  • FIG. 14 is a cross-sectional view showing an example of the positional relationship between the stator sheet and the magnet in the embodiment.
  • FIG. 15 is an enlarged cross-sectional view showing an example of the positional relationship between the stator sheet and the magnet in the embodiment.
  • FIG. 15 is an enlarged view of the portion shown in the frame F of FIG.
  • the axial length L1 of the tooth portion TT is larger than the axial length L2 of the magnet 71.
  • the end portion 7a of the magnet 71 in the axial direction faces the boundary portion B between the first stator sheet 10 and the second stator sheet 20 of the stack assembly SA. That is, the magnet 71 faces the second stator sheet 20 of the teeth portion TT in the radial direction, but does not face the first stator sheet 10.
  • the motor MT in the embodiment has a rotor 70 having a magnet 71 and a stator ST facing the rotor 70.
  • the stator ST includes an annular core back portion 50 and a teeth portion TT formed by laminating a plurality of flat plate-shaped members 10 and 20.
  • the plurality of plate members include a first flat plate-shaped member 10 and a second flat plate-shaped member 20.
  • the tooth portion TT is composed of a second flat plate-shaped member 20.
  • the first flat plate-shaped member 10 is arranged at the end of the teeth portion TT.
  • the first flat plate-shaped member 10 may be made of, for example, a non-magnetic material. This can improve efficiency.
  • the annular core back portion 50, the teeth portion TT which is formed by laminating a plurality of flat plate-shaped members and protrudes inward in the radial direction from the core back portion 50, and the teeth.
  • a stator having a coil 40 arranged in the portion TT is manufactured by combining the core back portion 50 and the teeth portion TT.
  • the plurality of flat plate-shaped members are composed of a first flat plate-shaped member 10 made of a non-magnetic material and a second flat plate-shaped member 20 made of a magnetic material.
  • the stator ST is manufactured by removing the central portion 15 of the first flat plate-shaped member 10 after the teeth portion TT is combined with the core back portion 50.
  • the teeth Ta to Tf before the central portion 15 of the first flat plate-shaped member 10 is removed are integrated by the end portion 10 of the stack assembly SA, and do not need to be aligned. Therefore, productivity is improved.
  • the central portion 15 of the first stator sheet 10 shown in FIG. 1 is not limited to a disk shape, and may be an annular shape having a hole portion formed in the central portion.
  • FIG. 16 is a perspective view showing an example of the first stator sheet in the modified example.
  • the first stator sheet A0 is a flat plate-shaped member made of a non-magnetic material such as resin.
  • a plurality of projecting portions A1 are formed so as to project outward in the radial direction from the annular portion AA. That is, in the modified example, the plurality of projecting portions A1 are connected by the annular portion AA so as to extend side by side in the circumferential direction.
  • the second stator sheet B0 is laminated on the protruding portion A1 of the first stator sheet A0 in the modified example in the axial direction.
  • the first stator sheet A0 and the second stator sheet B0 are fixed by overlapping the caulked portions, for example, as in the embodiment.
  • the first stator sheet A0 and the second stator sheet B0 may be fixed by, for example, in-mold caulking.
  • the first stator sheet A0 and the second stator sheet B0 may be formed with the same caulking portions as the caulking portions 12, 13, 22 and 23 in the embodiment.
  • FIGS. 17 and 18 show.
  • the indicated stack assembly SZ is formed.
  • the stack assembly SZ is composed of a pair of first stator sheets A0 and a second stator sheet B0.
  • FIG. 17 is an exploded perspective view showing an example of the stack assembly in the modified example.
  • FIG. 18 is a perspective view showing an example of the stack assembly in the modified example.
  • the first stator sheets A0 are fixed to both sides of the plurality of second stator sheets B0 in the axial direction.
  • the plurality of second stator sheets B0 stacked in the axial direction each form a teeth portion TZ.
  • the stator coil assembly CZ shown in FIG. 19 is formed by arranging the coil C0 in the stack assembly SZ.
  • the stack assembly SZ is coated with insulation, other insulating means such as mounting an insulator (not shown) between the stack assembly SZ and the coil C0 may be used.
  • FIG. 19 is a perspective view showing an example of the stator coil assembly in the modified example.
  • the coil C0 is wound around each tooth portion TZ of the stack assembly SZ via a pair of first stator sheets A0.
  • the coil C0 is wound by, for example, a winding machine.
  • the air core coil formed in advance may be arranged so as to be mounted on the teeth portion TZ and the first stator sheet A0.
  • FIG. 20 is a perspective view showing an example of a stator coil assembly to which an outer peripheral ring is attached in a modified example.
  • the outer peripheral ring D0 is formed of an electromagnetic steel sheet or the like, similarly to the stator ring 50 in the embodiment.
  • the outer peripheral ring D0 is connected to the stator coil assembly CZ by press fitting or caulking.
  • the outer peripheral ring D0 is an example of a cylindrical member.
  • the spacing in the circumferential direction of each tooth portion TZ becomes equal, and the roundness of the stator ST can be improved, so that the cogging component can be reduced.
  • the teeth portion TZ is connected by using the non-magnetic first stator sheet A0, iron loss and an increase in cogging torque are suppressed.
  • the punching process of the first stator sheet becomes unnecessary, the manufacturing process can be simplified.
  • the coil when winding the coil around the teeth portion TZ, the coil is wound from the outside to the inside in the radial direction by using the winding machine used for the outer rotor type motor. Can be done. As a result, even when the number of teeth portions TZ increases and the distance between the inner diameters between the teeth portions TZ becomes small, winding to the teeth portions TZ becomes easy.
  • the present invention is not limited to the above embodiments.
  • the present invention also includes those configured by appropriately combining the above-mentioned constituent elements. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

Abstract

Un moteur (MT) comprend un rotor (70) qui présente des aimants (71), et un stator (ST) qui fait face au rotor. Le stator comprend un dos de noyau annulaire (50) et des dents (TT) formées chacune par stratification d'une pluralité de matériaux de plaque (10, 20). Les matériaux de plaque comprennent des premiers éléments de plaque plate (10) et des seconds éléments de plaque plate (20). Les dents sont chacune constituées des seconds éléments de plaque plate (20). Les premiers éléments de plaque plate sont disposés aux extrémités des dents.
PCT/JP2021/041863 2020-11-19 2021-11-15 Procédé de fabrication de moteur et de stator WO2022107713A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2022563736A JPWO2022107713A1 (fr) 2020-11-19 2021-11-15

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Application Number Priority Date Filing Date Title
JP2020192742 2020-11-19
JP2020-192742 2020-11-19

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WO2022107713A1 true WO2022107713A1 (fr) 2022-05-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138953A (ja) * 1987-11-26 1989-05-31 Toshiba Corp 回転電機用固定子の製造方法
JPH03284144A (ja) * 1990-03-29 1991-12-13 Matsushita Seiko Co Ltd 電動機固定子の製造方法
JPH06133501A (ja) * 1991-12-03 1994-05-13 Mitsui High Tec Inc 電動機固定子積層鉄心及びその製造方法
JP2006050743A (ja) * 2004-08-03 2006-02-16 Nippon Densan Corp モータ用のコア部材、モータおよび電機子の製造方法
JP2012120353A (ja) * 2010-12-02 2012-06-21 Toyota Motor Corp 回転電機用ロータ
JP2015070721A (ja) * 2013-09-30 2015-04-13 国産電機株式会社 永久磁石回転電機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01138953A (ja) * 1987-11-26 1989-05-31 Toshiba Corp 回転電機用固定子の製造方法
JPH03284144A (ja) * 1990-03-29 1991-12-13 Matsushita Seiko Co Ltd 電動機固定子の製造方法
JPH06133501A (ja) * 1991-12-03 1994-05-13 Mitsui High Tec Inc 電動機固定子積層鉄心及びその製造方法
JP2006050743A (ja) * 2004-08-03 2006-02-16 Nippon Densan Corp モータ用のコア部材、モータおよび電機子の製造方法
JP2012120353A (ja) * 2010-12-02 2012-06-21 Toyota Motor Corp 回転電機用ロータ
JP2015070721A (ja) * 2013-09-30 2015-04-13 国産電機株式会社 永久磁石回転電機

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