WO2023021600A1 - Élément de champ et moteur électrique - Google Patents

Élément de champ et moteur électrique Download PDF

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Publication number
WO2023021600A1
WO2023021600A1 PCT/JP2021/030141 JP2021030141W WO2023021600A1 WO 2023021600 A1 WO2023021600 A1 WO 2023021600A1 JP 2021030141 W JP2021030141 W JP 2021030141W WO 2023021600 A1 WO2023021600 A1 WO 2023021600A1
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WO
WIPO (PCT)
Prior art keywords
magnet
magnetic pole
boundary line
width direction
field element
Prior art date
Application number
PCT/JP2021/030141
Other languages
English (en)
Japanese (ja)
Inventor
亨 伊藤
雄一朗 中村
治之 長谷川
裕介 坂本
久範 鳥居
ザイニ アリフ
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 JP2022505626A priority Critical patent/JP7086318B1/ja
Priority to CN202180097477.4A priority patent/CN117203879A/zh
Priority to PCT/JP2021/030141 priority patent/WO2023021600A1/fr
Publication of WO2023021600A1 publication Critical patent/WO2023021600A1/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
    • 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
    • H02K1/278—Surface mounted magnets; Inset 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
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

Definitions

  • the present disclosure relates to field elements and electric motors.
  • a field element of an electric motor using a magnet there is a field element as a rotor of a rotating electric machine, which is one type of electric motor.
  • a magnet provided in a field element, which is a rotor has magnetic poles composed of a plurality of N poles and a plurality of S poles alternately magnetized along the circumferential direction on the outer peripheral surface.
  • An armature of an electric motor that applies a magnetic field to a field element to generate a torque that rotates the field element has slots that house the windings that generate the magnetic field.
  • torque ripple which is torque fluctuation, may occur due to the magnetic influence between the magnetic poles of the field element and the slots of the armature.
  • Patent Literature 1 discloses an electric motor in which a magnetic pole boundary line of a permanent magnet has a gradually increasing twist angle with respect to a rotation axis.
  • the present disclosure has been made to solve the problems described above. To provide a field element capable of magnetizing the magnet of the field element with high accuracy without being easily affected by the leakage flux of a magnetizing yoke at the end portion where the magnetic pole boundary line has a large inclination.
  • a field element has a magnetic pole face that is a surface in which a plurality of N poles and a plurality of S poles are alternately magnetized along a first direction, and adjacent N poles on the magnetic pole face
  • the magnetic pole boundary line which is the boundary between the S pole and the magnetic pole boundary
  • the magnitude of the inclination of the line increases from one end to the other end in the magnet width direction, and the magnet fixed portion on the opposite side of the magnet's magnetic pole face in the magnet thickness direction, which is the direction perpendicular to the magnetic pole face.
  • a magnet support structure that is joined to support the magnet, and a magnetic member that is arranged outside the other end side in the magnet width direction of the magnet and on the magnet side in the magnet thickness direction of the magnet support structure and is composed of a magnetic material, An end portion of the magnetic member opposite to the magnet supporting structure side in the magnet thickness direction is located between the magnet fixing portion and the magnetic pole surface in the magnet thickness direction.
  • the inclination of the magnetic pole boundary line of the magnet is large during magnetization. It is possible to magnetize the magnet of the field element with high accuracy without being affected by the leakage flux of the magnetizing yoke at the ends.
  • FIG. 1 is a perspective view of a field element according to Embodiment 1 of the present disclosure
  • FIG. 1 is a side view of a field element according to Embodiment 1 of the present disclosure
  • FIG. 1 is a cross-sectional view of an electric motor according to a first embodiment of the present disclosure
  • FIG. FIG. 4 is a partially developed view showing one magnetic pole boundary line by developing the outer peripheral surface of the magnet of the field element according to the first embodiment of the present disclosure so that the circumferential direction is a plane
  • FIG. 4 is a schematic diagram illustrating that a magnetizing yoke is partially shared for magnetization of field elements having a plurality of types of magnet widths in the field element according to the first embodiment of the present disclosure
  • FIG. 4 is a schematic diagram illustrating magnetization of the field element according to the first embodiment of the present disclosure
  • FIG. FIG. 4 is a schematic diagram for explaining the effect of the magnetic member when magnetizing the field element according to the first embodiment of the present disclosure
  • FIG. 10 is a side view of a modification in which the magnet and the magnetic member are in contact with each other in the field element according to the first embodiment of the present disclosure
  • FIG. 3 is a side view of a modification in which the magnetic pole boundary line in the field element according to the first embodiment of the present disclosure is inclined in the direction opposite to that in FIG. 2;
  • FIG. 10 is a side view of a modification in which the magnetic pole boundary line in the field element according to the first embodiment of the present disclosure is inclined in the direction opposite to that in FIG. 2;
  • FIG. 3 is a side view of a modification in which the magnetic pole boundary line in the field element according to the first embodiment of the present disclosure is inclined in the direction opposite to that in FIG. 2;
  • FIG. 10 is a side view of a modified example in which the field element according to the first embodiment of the present disclosure has four sections with different inclinations of the magnetic pole boundary lines with respect to the magnet width direction;
  • FIG. 4 is a side view of a field element according to a second embodiment of the present disclosure;
  • FIG. 10 is a partially developed view showing one magnetic pole boundary line by developing the outer peripheral surface of the magnet of the field element according to the second embodiment of the present disclosure so that the circumferential direction is a plane;
  • the field element and the electric motor according to the embodiment of the present disclosure will be described in detail based on the drawings.
  • the field element is the rotor and the electric motor is the rotary electric machine.
  • Embodiment 1 is a perspective view of a field element according to a first embodiment of the present disclosure
  • the field element 1 is a rotor, and includes a magnet 10, a magnet support structure 20, and a magnetic member 21.
  • the magnet 10 is a cylindrical magnet centered on the central axis AX.
  • the first direction is the circumferential direction around the central axis AX on the outer peripheral surface of the cylindrical magnet in FIG. 1, and is indicated by the ⁇ -axis arrow.
  • the magnet 10 has, as a magnetic pole surface 14, an outer peripheral surface magnetized alternately with a plurality of N poles and a plurality of S poles along the circumferential direction, which is the first direction.
  • the magnet width direction which is the direction perpendicular to the circumferential direction, which is the first direction, on the outer peripheral surface, which is the magnetic pole surface 14 of the magnet 10, is indicated by the Z-axis arrow in FIG.
  • the magnet width direction is parallel to the central axis AX.
  • the magnetic pole boundary line 11 which is the boundary between the adjacent N pole and S pole, extends from one end 15 side to the other end 16 in the magnet width direction of the magnet 10. extending to the side.
  • N poles are indicated by N
  • S poles by S.
  • the magnet support structure 20 is a cylindrical shaft centered on the central axis AX.
  • the outer peripheral surface of the shaft and the inner peripheral surface of the cylindrical magnet are fitted, and the shaft and the cylindrical magnet are joined. That is, the magnet support structure 20 supports the magnet 10 by being joined to the magnet fixing portion 17 which is the inner peripheral surface on the side opposite to the pole surface 14 in the magnet thickness direction, which is the direction perpendicular to the pole surface 14 of the magnet 10 .
  • the magnet thickness direction is the radial direction perpendicular to the central axis AX, and is indicated by the R-axis arrow.
  • the magnetic member 21 is arranged on the outside of the magnet 10 on the other end 16 side in the magnet width direction and on the outer circumference of the shaft on the magnet side in the magnet thickness direction of the magnet support structure 20 .
  • the magnetic member 21 is made of a magnetic material.
  • the field element 1 is a rotor, and the magnetic member 21 has a ring shape around the central axis AX.
  • FIG. 2 is a side view of the field element according to the first embodiment of the present disclosure;
  • the magnet 10 provided in the field element 1 is a cylindrical magnet, and a plurality of N poles and a plurality of N poles alternately magnetized along the circumferential direction on the outer peripheral surface, which is the magnetic pole surface 14 of the cylindrical magnet.
  • the south pole of A magnetic pole boundary line 11, which is a boundary between adjacent N and S poles on the magnetic pole surface 14, extends from one end 15 side to the other end 16 side in the magnet width direction on the outer peripheral surface of the magnet 10.
  • the magnetic pole boundary line 11 is divided into three sections, section D1, section D2, and section D3, between one end 15 and the other end 16 of the magnet 10 in the magnet width direction.
  • the magnetic pole boundary line 11 is composed of a straight line 111 on the outer peripheral surface that is a straight line in a plane when the outer peripheral surface is developed so that the circumferential direction is straight in the section D1.
  • the magnetic pole boundary line 11 is composed of a straight line 112 on the outer peripheral surface in the section D2, and composed of a straight line 113 on the outer peripheral surface in the section D3.
  • the straight line 111 and the straight line 112 are connected at a break point 121 .
  • the straight line 112 and the straight line 113 are connected at a break point 122 .
  • the magnetic pole boundary lines 11 of two adjacent sections are connected to each other.
  • the magnetic pole boundary line 11 changes its inclination on the outer peripheral surface with respect to the magnet width direction at the bending points 121 and 122, and the straight lines 111, 112, and 113 in the sections D1, D2, and D3.
  • the inclinations of the straight lines on the magnetic pole faces 14 with respect to the magnet width direction are all different. That is, the magnetic pole boundary line 11 has three sections in the magnet width direction in which the inclination of the magnetic pole boundary line 11 with respect to the magnet width direction is different.
  • the inclinations of the straight lines 111, 112, and 113 in the sections D1, D2, and D3 of the magnetic pole boundary line 11 with respect to the magnet width direction are all in the circumferential direction, which is the first direction,
  • the sign is tilted in the positive direction and the magnitude of the tilt is 0 or more. That is, the magnetic pole boundary lines 11 in all sections are inclined in the same direction with respect to the width direction of the magnet with a magnitude of inclination of 0 or more.
  • the gradient of the magnetic pole boundary line 11 in each section is greater than the gradient of the straight line 111, which is the magnetic pole boundary line 11 in the section D1, which is the endmost section on the one end 15 side in the magnet width direction.
  • the straight line 112 of the section D2 adjacent to the other end 16 side of D1 has a greater inclination with respect to the magnet width direction.
  • the inclination of the straight line 113 of the section D3, which is adjacent to the other end 16 side of the section D2 and closest to the other end 16 side, to the magnet width direction is greater than the inclination of the straight line 112 of the section D2 to the magnet width direction. big.
  • the magnitude of the inclination of the magnetic pole boundary line 11 increases from the section on the one end 15 side to the section on the other end 16 side in the magnet width direction of the magnet 10 . That is, the magnetic pole boundary line 11 is formed by connecting three straight lines 111, 112, 113 on the magnetic pole surface 14, and the magnitude of the inclination of the straight lines 111, 112, 113 on the magnetic pole surface 14 with respect to the magnet width direction , from the straight line 111 on the one end 15 side to the straight line 113 on the other end 16 side in the magnet width direction. In other words, the shape of the magnetic pole boundary line 11 on the magnetic pole surface 14 is asymmetrical in the magnet width direction.
  • the magnetic member 21 is arranged outside the other end 16 of the magnet 10 in the magnet width direction. That is, the magnetic member 21 is arranged on the outside of the other end 16 of the magnet 10 where the magnetic pole boundary line 11 has the largest inclination in the magnet width direction.
  • the surface of the magnetic member 21 facing the magnet 10 in the magnet width direction is parallel to the end surface of the opposite end 16 of the magnet 10 .
  • FIG. 3 is a cross-sectional view of the electric motor according to the first embodiment of the present disclosure;
  • FIG. Electric motor 100 shown in FIG. 3 includes field element 1, armature 2, and armature support structure 210 shown in FIG.
  • the field element 1 is a rotor and includes a magnet 10, which is a cylindrical magnet, and a magnet support structure 20, which is a shaft.
  • the armature 2 is a stator and is fixed and supported by an armature support structure 210 .
  • the field element 1 is arranged inside the armature 2, and is spaced between the field element 1 and the armature support structure 210 so that the field element 1 can rotate with respect to the armature 2 about the central axis AX. are rotatably supported by bearings (not shown).
  • the first direction is the circumferential direction around the central axis AX, which is the driving direction in which the magnet 10 of the field element 1 moves relative to the armature 2 on the magnetic pole surface 14 of the magnet 10 .
  • the field element 1 includes a magnetic member 21 arranged on the outer circumference of the magnet support structure 20 on the magnet side in the magnet thickness direction.
  • An outer peripheral end surface 22 of the magnetic member 21 on the opposite side of the magnet support structure in the magnet thickness direction is located between the magnet fixing portion 17 and the pole surface 14 in the magnet thickness direction.
  • the magnet thickness direction is the radial direction perpendicular to the central axis AX, and is indicated by the R-axis arrow.
  • FIG. 4 is a partial development view showing one magnetic pole boundary line by developing the outer peripheral surface of the magnet of the field element according to the first embodiment of the present disclosure so that the circumferential direction is flat.
  • the circumferential direction which is the first direction on the magnetic pole surface 14 of the magnet 10
  • the circumferential direction is indicated by the ⁇ -axis arrow.
  • the magnet width direction which is the direction perpendicular to the first direction on the pole face 14 of the magnet 10, is indicated by the Z-axis arrow.
  • the amount of displacement in the first direction of the magnetic pole boundary line 11 in the length dL of the minute section of the magnet 10 in the magnet width direction is indicated by d ⁇ .
  • the inclination of the magnetic pole boundary line 11 in this minute interval is d ⁇ /dL.
  • a magnet width L is the length of the magnet 10 in the magnet width direction.
  • the first magnitude which is the magnitude of the magnet 10 in the first direction
  • ⁇ M the first magnitude in the first direction of the magnetic poles composed of the north and south poles of the magnet 10
  • the number included between the magnitudes ⁇ M is the pole number P
  • the number of slots included between the first magnitudes ⁇ M in the first direction of the armature 2 corresponding to the field element 1 is the slot number S. do.
  • the theoretical skew amount ⁇ T is the reference for the amount of displacement in the first direction of the magnetic pole boundary line 11 with respect to the magnet width L
  • the field element 1 is a rotor
  • the magnetic pole boundary line between both ends of the magnet width L of the magnet 10 is a single straight line on the magnetic pole surface, and the magnetic pole boundary line is set in the magnet width direction
  • the amount of theoretical skew ⁇ T ⁇ M/(least common multiple of P and S) to reduce torque ripple. It has been known.
  • the magnet 10 The inclination of the magnetic pole boundary line 11 with respect to the magnet width direction at the end on the one end 15 side is d ⁇ 1/dL1. Further, if the amount of displacement in the first direction of the magnetic pole boundary line 11 in the minute section length dL2 in the magnet width direction at the end portion on the other end 16 side of the magnet 10 is d ⁇ 2, then the displacement amount on the other end 16 side of the magnet 10 is The inclination of the magnetic pole boundary line 11 at the end is d ⁇ 2/dL2.
  • the field element 1 has the inclination of the magnetic pole boundary line 11 so as to satisfy the relationship 0 ⁇
  • the magnetic pole boundary line between both ends of the magnet width L of the magnet 10 is assumed to be a single straight line on the magnetic pole surface, and the amount of displacement of the magnetic pole boundary line in the first direction with respect to the magnet width L is the theoretical skew.
  • the effect of reducing torque ripple can be obtained in the same way as when the amount is set.
  • FIG. 5 illustrates that, in the field element according to the first embodiment of the present disclosure, magnetization is performed by partially sharing one type of magnetizing yoke for field elements having a plurality of types of magnet widths. It is a schematic diagram to do.
  • the magnets of the field element according to the first embodiment of the present disclosure are magnets 10, 10A, and 10B with three different magnet widths L, LA, and LB, and one type of It schematically shows that the magnets of the field element are arranged and magnetized in the magnetizing yoke by changing the position in the magnet width direction according to the magnet width.
  • the range 820 corresponding to the magnetization yoke indicates the range that can be magnetized by the magnetization yoke.
  • the magnetizing yoke corresponding range 820 is indicated by a solid-line square area having a length L800 in the Z-axis direction, which is the width direction of the magnet.
  • the magnetizing yoke corresponding range 820 there are one magnetic pole boundary line 11A of the magnet 10A with the magnet width LA, one magnetic pole boundary line 11 of the magnet 10 with the magnet width L, and one magnetic pole of the magnet 10B with the magnet width LB.
  • the boundary line 11B is partially overlapped and shown side by side.
  • the magnet widths LA, L, and LB have different sizes, LA>L>LB.
  • Each magnetic pole boundary line is formed by connecting straight lines with different inclinations at bending points 121A, 122A, 121, 122, 121B, and 122B.
  • the magnet 10 is indicated by a solid-line square in which the length of the magnet width in the Z-axis direction is L.
  • the magnet 10A is indicated by a dashed square with a magnet width length LA in the Z-axis direction.
  • the magnet 10B is indicated by a chain-dotted square with a magnet width of LB in the Z-axis direction.
  • the magnetic pole boundary line 11 of the magnet 10 has three sections D1, D2, and D3, and is composed of straight lines 111, 112, and 113 on the magnetic pole surface 14 in each section.
  • the inclinations of the straight lines 111, 112, and 113 on the magnetic pole surface 14 with respect to the magnet width direction are all inclined in the same positive direction of the ⁇ axis with respect to the magnet width direction.
  • the magnitude of each inclination of the straight lines 111, 112, and 113 in each section increases from the section on the one end side to the section on the other end side in the magnet width direction.
  • the inclinations of the magnetic pole boundary lines in each section of each magnet are all inclined in the same direction with respect to the magnet width direction, and the magnitude of the inclination is the width direction of the magnet. It becomes larger from the section on the one end side to the section on the other end side.
  • the magnetic pole boundary lines 11A, 11, and 11B of the magnets 10A, 10, and 10B having a plurality of types of magnet widths are partially overlapped and aligned to form a part of one connecting line 11W. can be configured to coincide with the pole boundaries 11A, 11, 11B of the respective magnets 10A, 10, 10B.
  • a magnetizing yoke 800 not shown in FIG. 5 is used to magnetize the magnets provided in the field element.
  • the magnetizing yoke 800 is a facility for magnetizing the magnet of the field element so that the magnet can be magnetized so as to form a magnetic pole boundary line along the coupling line 11W in the magnetizing yoke corresponding range 820. make.
  • a reference end 830 indicates an end face that serves as a reference for the position of the magnetizing yoke 800 in the magnet width direction.
  • the reference end 830 is indicated by a straight line on one side forming a solid-line square indicating the periphery of the magnetizing yoke corresponding range 820 .
  • the magnet 10 having the magnet width L is arranged so that one end 15 of the magnet 10 coincides with a position separated from the reference end 830 by the reference distance Lm10 in the magnet width direction.
  • Boundary line 11 coincides with a portion of connecting line 11W.
  • the magnet 10 before magnetization is arranged so that one end 15 of the magnet 10 coincides with a position apart from the reference end 830 by the reference distance Lm10 in the magnet width direction, and the magnet 10 is magnetized.
  • the magnet 10 can be magnetized so as to form the magnetic pole boundary line 11 .
  • the magnet 10B when the magnet 10B is arranged so that one end 15B of the magnet 10B coincides with a position apart from the reference end 830 in the magnet width direction by the reference distance Lm10B, the magnet 10B is magnetized.
  • the magnet 10B can be magnetized so as to form the magnetic pole boundary line 11B.
  • the magnet 10A can be magnetized so as to form the magnetic pole boundary line 11A by arranging the magnet 10A at an appropriate position in the magnetization yoke 800 in the magnet width direction. can.
  • one type of magnetizing yoke 800 corresponding to the entire coupling line 11W magnetizes the magnets 10A, 10, and 10B of a plurality of types of field elements having different magnet widths using the magnetizing yoke 800. can be done.
  • the magnetic pole boundary line 11 of the magnet 10 with the magnet width L has three straight lines, sections D1, D2, and D3, as sections with different inclinations of the magnetic pole boundary line 11 .
  • the magnetic pole boundary line 11A of the magnet 10A having the magnet width LA has three sections with different inclinations, and the section with the largest inclination is D3A.
  • the straight line 111 forming the magnetic pole boundary line 11 of the section D1 of the magnet 10 has the same inclination with respect to the magnet width direction as the straight line 113A forming the magnetic pole boundary line 11A of the section D3A of the magnet 10A.
  • the straight line 111 that is part of the magnetic pole boundary line 11 of the magnet 10 and the straight line 113A that is part of the magnetic pole boundary line 11A of the magnet 10A can partially overlap. Yes, overlapping in area DWA.
  • the straight line 113 forming the magnetic pole boundary line 11 of the section D3 of the magnet 10 and the straight line 111B forming the magnetic pole boundary line 11B of the section D1B of the magnet 10B have an inclination with respect to the magnet width direction. are the same and overlapped in the area DWB.
  • the total length L800 of the magnetizing yoke 800 is shorter than the sum of the magnet widths LA, L, LB, and the magnetizing yoke 800 can be made compact.
  • the size of magnetizing equipment can be reduced.
  • the magnetic pole boundary line 11 of the magnet 10 having the magnet width L has a section D2 as a degree of design freedom in which the inclination of the magnetic pole boundary line and the length of the section can be set apart from the sections D1 and D3.
  • the overall inclination shape of the magnetic pole boundary line 11 of the magnet 10 can be adjusted in terms of design.
  • the inclination and length of the section D2 as well as the sections D1 and D3 are adjusted to design the overall inclination shape of the magnetic pole boundary line 11, and based on the designed shape of the magnetic pole boundary line, the electromagnetic Confirm that torque ripple can be reduced by analysis.
  • the magnets having different magnet widths and the magnetic pole boundary line are overlapped to form a magnetizing yoke for magnetization. It is possible to easily design the shape of the magnetic pole boundary line 11 that reduces the torque ripple while downsizing the 800 .
  • the first embodiment of the present disclosure an example has been described in which three straight lines on the magnetic pole surface 14 are provided for each section with a different inclination of the magnetic pole boundary line.
  • the magnetic pole surface 14 may have four or more straight lines of different widths, and in this case, the magnets having different magnet widths and the magnetic pole boundaries are overlapped to reduce the size of the magnetizing yoke while reducing the torque ripple. Designing the shape of the magnetic pole boundary line can be facilitated.
  • magnet 10A with magnet width LA and magnet 10B with magnet width LB do not have a magnetic pole boundary line with a magnet width adjacent to one side.
  • the line has three or more sections with different slopes.
  • FIG. 6 is a schematic diagram explaining magnetization of the field element according to the first embodiment of the present disclosure.
  • a magnetizing yoke 800 is used to magnetize the magnet 10 provided in the field element 1 .
  • the magnetizing yoke 800 schematically shows a cross section, and the field element 1 shows a side surface.
  • the magnetizing yoke 800 internally has a space shaped to match the field element 1, stores the field element 1 in the space, and surrounds the magnet 10 of the field element.
  • the magnetizing yoke 800 includes a magnetizing coil (not shown), which is a coil for magnetizing, around the space for storing the magnet 10 of the field element 1 .
  • the magnetizing coil has a shape that can generate a magnetic flux that matches the magnetic pole boundary line of the magnetic pole that magnetizes the magnet.
  • a current is passed through the magnetizing coil of the magnetizing yoke 800 to generate a magnetic flux for magnetization from the magnetizing coil. Apply magnetic flux.
  • a magnetic pole that becomes the magnetic pole boundary line 11 having a desired shape is formed by magnetizing the magnetic pole face 14 of the magnet 10 .
  • the magnetizing yoke 800 Since one type of magnetizing yoke 800 is used to magnetize magnets having a plurality of types of magnet widths, the magnetizing yoke 800 is arranged along a connecting line connecting the magnetic pole boundaries of magnets having a plurality of types of magnet widths. A magnetizing coil is provided along which a magnetic flux for magnetization can be generated. Corresponding to the example magnet of FIG. 5, the magnetizing yoke 800 is provided along a coupling line 11W that partially coincides with the pole boundary lines 11A, 11, 11B of the magnets 10A, 10, 10B of the multiple types of magnet widths. and a magnetizing coil capable of generating magnetic flux for magnetization.
  • the length L800 of the magnetizing yoke 800 in the magnet width direction is longer than the magnet widths LA, L, LB of each of the magnets.
  • the magnet 10 is placed at an appropriate position in the magnet width direction in the magnetizing yoke 800 that is long in the magnet width direction.
  • An appropriate position in the magnet width direction is a position in the magnet width direction where the magnetic pole boundary line 11 to be formed in the magnet 10 coincides with a part of the magnetic pole boundary line 11W that can be magnetized by the magnetizing yoke 800. position.
  • FIG. 6( a ) shows an example of magnetizing the magnet 10 in the magnetizing yoke 800 .
  • the magnet 10 before magnetization is arranged so that one end 15 of the magnet 10 coincides with a position apart from a reference end 830 of the magnetizing yoke 800 by a reference distance Lm10 in the magnet width direction. It shows that it is magnetized. With this, the magnet 10 can be magnetized so as to form the magnetic pole boundary line 11 .
  • FIG. 6(b) shows an example of magnetizing the magnet 10B in the magnetizing yoke 800.
  • FIG. 6B the magnet 10B before magnetization is arranged so that one end 15B of the magnet 10B coincides with a position apart from the reference end 830 of the magnetizing yoke 800 by the reference distance Lm10B in the magnet width direction. It shows that it is magnetized.
  • the magnet 10B can be magnetized so as to form the magnetic pole boundary line 11B.
  • the magnetic member 21 of the field element according to the first embodiment of the present disclosure will be described.
  • the field element 1 is located outside the other end 16 side of the magnet 10 in the magnet width direction and on the magnet side of the magnet support structure 20 in the magnet thickness direction.
  • a magnetic member 21 made of a magnetic material is provided.
  • the inclination of the magnetic pole boundary line 11 at the end portion of the magnet 10 on the other end 16 side with respect to the magnet width direction is greater than the inclination of the magnetic pole boundary line 11 at the end portion on the one end 15 side of the magnet 10 .
  • the field element 1 is positioned outside the other end 16 of the magnet 10, which is the end of the magnet 10 in the magnet width direction where the inclination of the magnetic pole boundary line 11 with respect to the magnet width direction is large.
  • a magnetic member 21 is provided. Further, as shown in the cross-sectional view of FIG. 3, the outer peripheral end surface 22 of the magnetic member 21, which is the end of the magnetic member 21 opposite to the magnet supporting structure side in the magnet thickness direction, is located between the magnet fixing portion 17 and the magnetic pole in the magnet thickness direction. It is located between the surface 14 and the
  • FIG. 7 is a schematic diagram illustrating the effect of the magnetic member when magnetizing the field element according to the first embodiment of the present disclosure.
  • FIG. 7B shows the magnetic flux when the field element 1 according to the first embodiment of the present disclosure is arranged inside the magnetizing yoke 800 and the magnetic flux for magnetization is applied to the magnet 10. The state is shown schematically.
  • FIG. 7A shows a field element 1Q that does not have a magnetic member 21 on the magnet side in the magnet thickness direction of the magnet support structure 20, unlike the field element 1 according to the first embodiment of the present disclosure.
  • 8 is a diagram schematically showing the state of magnetic flux when the magnetic flux for magnetization is applied to the magnet 10 placed inside the magnetizing yoke 800.
  • FIG. The field element 1Q is different from the field element 1 of FIG. 1 in that the magnetic member 21 is not provided on the magnet side of the magnet support structure 20 in the magnet thickness direction, and other configurations are the same.
  • FIG. 7B shows the magnetic flux when the field element 1 according to the first embodiment of the present disclosure is arranged inside the magnetizing yoke 800 and the magnetic flux for magnetization is applied to the magnet 10. It is the figure which showed the state typically.
  • the magnetic member 21 By providing the magnetic member 21 on the magnet side of the magnet support structure 20 in the magnet thickness direction, the magnetic flux 810 generated by the magnetizing coil inside the magnetizing yoke 800 is opposed to the magnet 10 .
  • the magnetic flux generated on the inner peripheral surface of the magnetizing yoke 800 without magnetization flows into the magnetic member 21 made of a magnetic material, and the influence of leakage flux to the other end 16 of the magnet 10 can be reduced.
  • the field element 1 has been described as an example in which no magnetic member is provided outside the one end 15 side of the magnet 10 on the outer periphery of the magnet support structure 20, but the field element 1 does not include the magnet support structure 20
  • a magnetic member may also be provided on the outer side of the one end 15 side of the magnet 10 on the outer periphery of the magnet 10 .
  • the magnet 10 and the magnetic member 21 are separated in the magnet width direction. In this example, there is an air gap between the magnet 10 and the magnetic member 21 , but a non-magnetic material may be provided between the magnet 10 and the magnetic member 21 .
  • the magnetic pole surface 14 which is a surface in which a plurality of N poles and a plurality of S poles are alternately magnetized along the first direction
  • the magnetic pole boundary lines 11, which are boundaries between adjacent N and S poles on the magnetic pole surface 14, are all oriented in the same direction with respect to the magnet width direction which is perpendicular to the first direction on the magnetic pole surface 14.
  • the magnet 10 is tilted at a magnitude of 0 or more, and the magnitude of the gradient of the magnetic pole boundary line 11 increases from one end 15 to the other end 16 in the magnet width direction, and the direction perpendicular to the magnetic pole face 14.
  • a magnet support structure 20 that supports the magnet 10 by being joined to the magnet fixing portion 17 on the side opposite to the magnetic pole surface 14 of the magnet 10 in the magnet thickness direction, and the outside of the other end 16 side in the magnet width direction of the magnet 10, and a magnetic member 21 that is arranged on the magnet 10 side in the magnet thickness direction of the magnet support structure 20 and is made of a magnetic material, and is provided on the opposite side of the magnet support structure 20 in the magnet thickness direction of the magnetic member 21 .
  • the outer peripheral end surface 22, which is the end portion, is positioned between the magnet fixing portion 17 and the magnetic pole surface 14 in the magnet thickness direction, so that the magnetic pole boundary line extends from one end 15 to the other end 16 of the magnet 10 of the field element 1.
  • the magnetic pole boundary line 11 of the magnet 10 is not easily affected by the leakage flux of the magnetizing yoke 800 at the end of the magnet 10 on the side of the other end 16 where the inclination is large.
  • One magnet 10 can be magnetized with high accuracy.
  • the magnetic pole boundary line 11 is formed by connecting three or more straight lines on the magnetic pole surface 14, such as straight lines 111, 112, and 113, and the magnitude of the inclination of the straight lines 111, 112, and 113 with respect to the magnet width direction is Since the magnetic pole boundary line 11 is composed of a straight line, the magnetizing yoke 800 can be manufactured easily. Become.
  • the displacement amount in the first direction of the magnetic pole boundary line 11 in the length dL1 of the minute section in the magnet width direction at the end on the one end 15 side of the magnet 10 is d ⁇ 1, and at the end on the other end 16 side of the magnet 10,
  • the displacement amount in the first direction of the magnetic pole boundary line 11 in the length dL2 of the minute section in the magnet width direction is d ⁇ 2
  • the length of the magnet 10 in the magnet width direction is the magnet width L
  • the magnetic pole boundary line 11 with respect to the magnet width L is
  • the magnet 10 is a cylindrical magnet having a cylindrical shape centered on a central axis parallel to the magnet width direction, the magnetic pole surface 14 is the outer peripheral surface of the cylindrical magnet, and the first direction is the outer peripheral surface of the cylindrical magnet. Since the field element 1 is a rotor, even if the magnetic pole boundary line 11 is inclined with respect to the magnet width direction in the field element 1, which is a rotor, the magnet width
  • the magnetization yoke 800 can be used in common for a plurality of types of field elements with different magnetization.
  • the electric motor 100 of the first embodiment of the present disclosure includes the field element 1 of the first embodiment of the present disclosure and the armature 2, the magnetic pole boundary line 11 of the field element 1 of the electric motor 100 Even if the inclination with respect to the width direction is provided, a plurality of types of field elements having different magnet widths can be magnetized by sharing the magnetizing yoke. A plurality of types of field elements having different magnet widths can be magnetized by using a common magnetizing yoke. This facilitates manufacturing of motors with different outputs while downsizing the magnetizing equipment.
  • FIG. 8 is a side view of a modification in which the magnet and the magnetic member are in contact with each other in the field element according to the first embodiment of the present disclosure; FIG. 2 in that the magnet 10 provided in the field element 1E and the magnetic member 21E arranged on the magnet 10 side in the magnet thickness direction of the magnet support structure 20 are in contact with each other in the magnet width direction. .
  • the magnetization At this time, the magnetic flux leakage from the magnetizing yoke 800 is less likely to affect the end portion 16 of the magnetic pole boundary line 11 of the magnet 10, and the magnet 10 of the field element 1E can be magnetized with high accuracy. Furthermore, since the magnet 10 and the magnetic member 21E arranged on the outer periphery of the magnet support structure 20 are in contact with each other in the magnet width direction, the magnet width direction of the magnet 10 with respect to the magnet support structure 20 when the field element 1E is manufactured. The position can be positioned accurately.
  • the position of the magnet 10 in the magnet width direction with respect to the magnet support structure 20 becomes accurate, the position of the magnet 10 based on the magnet support structure 20 in the magnetizing yoke 800 becomes accurate, and the magnetization of the magnet 10 becomes accurate. can do well.
  • FIG. 9 is a side view of a modification in which the magnetic pole boundary line in the field element according to the first embodiment of the present disclosure is inclined in the direction opposite to that in FIG. 2.
  • FIG. 9 In the field element 1F in FIG. 9, unlike in FIG. 2, the inclination of the magnetic pole boundary line 11F is inclined in the negative direction in the circumferential direction.
  • the magnetic member 21 is positioned at the end of the magnet 10 in the magnet width direction with respect to the magnet 10F, which has the larger inclination of the magnetic pole boundary line. It is arranged outside the other end 16 which is the end.
  • the slopes of the straight lines 111F, 112F, and 113F in all sections of the magnetic pole boundary line 11F are the same in the circumferential direction of the magnet 10F, and the slopes are 0 or more in the same negative direction. 122F is connected.
  • the field element Even if the inclination of the magnetic pole boundary line 11 increases from one end 15 to the other end 16 of the magnet 10F of the 1F, the end portion on the other end 16 side where the inclination of the magnetic pole boundary line 11F of the magnet 10F is large at the time of magnetization , the magnet 10F of the field element 1F can be magnetized with high precision without being affected by the leakage flux of the magnetizing yoke.
  • FIG. 10 is a side view of a modification in which there are four sections in which the magnetic pole boundary lines of the field element according to the first embodiment of the present disclosure have different inclinations with respect to the magnet width direction.
  • the magnetic pole boundary line 11G of the magnet 10G has four sections D1G, D2G, D3G, and D4G in the magnet width direction with different inclinations of the magnetic pole boundary line with respect to the magnet width direction.
  • the magnetic pole boundary line 11G is formed by connecting a straight line 111G in the section D1G, a straight line 112G in the section D2G, a straight line 113G in the section D3G, and a straight line 114G in the section D4G at bending points 121G, 122G, and 123G.
  • the inclinations of the straight lines 111G, 112G, 113G, and 114G, which are magnetic pole boundary lines in each section, with respect to the magnet width direction are all different.
  • the inclinations of the magnetic pole boundary lines in all the sections D1G, D2G, D3G, and D4G are 0 or more in the positive direction, which is the same direction as the first direction.
  • the magnitude of the inclination of the magnetic pole boundary line 11G in each of the sections D1G, D2G, D3G, and D4G increases from the section on the one end 15 side to the section on the other end 16 side in the magnet width direction of the magnet 10G.
  • the inclination of the magnetic pole boundary lines 11G increases from one end 15 to the other end 16 of the magnet 10G of the field element 1G.
  • the magnetic pole boundary line 11G of the magnet 10G is hardly affected by the leakage flux of the magnetizing yoke at the end 16 having a large inclination, and the magnet 10G of the field element 1G can be magnetized with high accuracy.
  • the magnetic pole boundary line 111G of the section D1G on the side of the most one end 15 is inclined to overlap with the magnetic pole boundary line of the magnet width smaller than the magnet width, and the magnetic pole boundary line 114G of the section D4G on the side of the other end 16 is larger than the magnet width.
  • the magnetic pole boundary line of magnets with different magnet widths can be partially overlapped at the end of the magnet width, and multiple types of field elements with different magnet widths , the magnetizing yoke can be partially shared, and the size of the magnetizing equipment can be reduced.
  • the magnet support structure 20 is a shaft and the magnetic member 21 is provided on the outer circumference of the shaft has been described, but the magnet support structure 20 is a field core, and the magnet of the magnet 10
  • the field element may have a magnetic member made of a magnetic material arranged on the outer periphery of the field element core on the outside of the other end 16 side in the width direction.
  • the magnetic member 21 is joined to the outer periphery of the magnet support structure 20 and provided, but the magnetic member 21 is integrated with the magnet support structure 20 made of a magnetic material. good too.
  • Embodiment 2. 11 is a side view of a field element according to a second embodiment of the present disclosure; FIG. In FIG. 11, the same reference numerals as in FIG. 2 denote the same or corresponding configurations, and the description thereof will be omitted.
  • the magnitude of the inclination of the magnetic pole boundary line 11H of the magnet 10H provided in the field element 1H with respect to the magnet width direction is increased from one end 15 to the other end 16 of the magnet 10H in the magnet width direction. , which is continuously increasing.
  • the magnetic pole boundary lines 11H are all inclined in the same direction with an inclination magnitude of 0 or more with respect to the magnet width direction, which is the direction perpendicular to the first direction on the magnetic pole surface 14 .
  • the magnetic pole boundary line 11 has three sections in the magnet width direction in which the inclination of the magnetic pole boundary line 11 with respect to the magnet width direction is different. This corresponds to an infinite number of different sections between one end 15 and the other end 16 .
  • field element 1H is a rotor
  • magnet 10H is a cylindrical magnet centered on central axis AX.
  • the inclination of the magnetic pole boundary line 11H in the magnet 10H increases continuously from one end 15 to the other end 16 in the magnet width direction of the magnet 11H. Therefore, when the magnetic pole boundary line 11H is divided into arbitrary three sections D1H, D2H, and D3H from one end 15 toward the other end 16 in the magnet width direction, each of the sections D1H, D2H, and D3H of the magnetic pole boundary line 11H The slopes in the interval are different. Also, the magnetic pole boundary lines 11H of two adjacent sections among the sections D1H, D2H, and D3H are connected to each other.
  • the magnetic pole boundary lines 11H of each of the sections D1H, D2H, and D3H are inclined in the same direction with the magnitude of inclination of 0 or more with respect to the width direction of the magnet.
  • the magnitude of the inclination of the magnetic pole boundary line 11H increases from the section D1H on the one end side of the magnet to the section D3H on the other end side in the magnet width direction.
  • the magnetic pole boundary lines 11H of a plurality of types of magnets having different magnet widths are arranged at the ends of the magnet widths. Even if the magnetic pole boundary line 11H of the field element 1H is inclined with respect to the magnet width direction, the magnetizing yoke can be partially overlapped for a plurality of types of field elements having different magnet widths. It can be shared and the equipment for magnetization can be made smaller.
  • magnetization can be performed along a bonding line that is a curved line in which the inclination of the magnetic pole boundary line increases continuously toward one direction in the magnet width direction, and a magnet is cut from the bonding line at an arbitrary magnet width. If the curved line is the magnetic pole boundary line of the magnet, a magnet with an arbitrary magnet width can be magnetized.
  • FIG. 12 is a partially developed view showing one magnetic pole boundary line by developing the outer peripheral surface of the magnet of the field element according to the second embodiment of the present disclosure so that the circumferential direction is flat.
  • the circumferential direction which is the first direction on the magnetic pole surface of the magnet 10H
  • the circumferential direction is indicated by the ⁇ -axis arrow.
  • the magnet width direction which is the direction perpendicular to the first direction on the magnetic pole surface of the magnet 10H, is indicated by the Z-axis arrow.
  • the shape of the magnetic pole boundary line 11H on the magnetic pole surface is such that when the outer peripheral surface, which is the magnetic pole surface, is developed into a plane, the outer peripheral surface is developed.
  • 181 is a curved line that is a part of an ellipse 181 drawn on a flat plane. That is, an arbitrary point n (Zn, ⁇ n) on the magnetic pole boundary line 11H on the magnetic pole face of the magnet 10H exists on the locus of the ellipse 141 centered on the point p (Zp, ⁇ p).
  • each magnetic pole boundary line a curve that is part of the same ellipse 181
  • one type of magnetizing yoke that can magnetize the magnetic pole boundary line corresponding to the curve of the ellipse 181 is used.
  • the magnetic pole boundary line of the magnet of arbitrary width can be superimposed on one ellipse, and the curve of the ellipse can be
  • a magnet with an arbitrary width can be magnetized by one type of magnetizing yoke that can magnetize the corresponding magnetic pole boundary line.
  • the shape of the magnetic pole boundary line 11H on the magnetic pole surface of the magnet 10H a curved line that is a part of the ellipse 181, the short axis length a and the long axis length b of the ellipse 181 and the ellipse
  • the inclination shape of the magnetic pole boundary line 11H can be adjusted by adjusting the relative position of the center point p (Zp, ⁇ p) of the magnetic pole boundary line 11H to the magnet 10H, and the shape of the magnetic pole boundary line 11H can be easily designed.
  • the shape of the magnetic pole boundary line 11H on the magnetic pole surface of the magnet 10H a curved line that is a part of the ellipse 181
  • the inclination of the magnetic pole boundary line 11H as a whole changes continuously and becomes smooth, and the magnet 10H becomes smooth.
  • a smooth magnetic flux distribution characteristic can be obtained in which there is little sudden change in magnetic flux from one end 15 to the other end 16 .
  • the magnetic pole surface 14 which is a surface in which a plurality of N poles and a plurality of S poles are alternately magnetized along the first direction
  • a magnetic pole boundary line 11H which is a boundary between adjacent N poles and S poles on the magnetic pole surface 14, is oriented in the same direction with respect to the magnet width direction which is perpendicular to the first direction on the magnetic pole surface 14.
  • the magnet 10H is tilted at a magnitude of 0 or more, and the magnitude of the gradient of the magnetic pole boundary line 11H increases from one end 15 to the other end 16 in the magnet width direction, and the direction perpendicular to the magnetic pole face 14.
  • a magnet support structure 20 that supports the magnet 10H by being joined to the magnet fixing portion 17 on the side opposite to the magnetic pole surface 14 of the magnet 10H in the magnet thickness direction, and the outside of the magnet 10H on the other end 16 side in the magnet width direction, and a magnetic member 21 that is arranged on the magnet 10H side in the magnet thickness direction of the magnet support structure 20 and is made of a magnetic material, and is provided on the side opposite to the magnet support structure 20 side in the magnet thickness direction of the magnetic member 21 .
  • the outer peripheral end face 22, which is the end portion, is positioned between the magnet fixing portion 17 and the magnetic pole face 14 in the magnet thickness direction, and the magnitude of the inclination of the magnetic pole boundary line 11H is from one end 15 to the other end 16 in the magnet width direction.
  • the magnetic pole of the magnet 10H is increased at the time of magnetization.
  • the magnet 10H of the field element 1H can be magnetized with high accuracy because the leakage flux of the magnetizing yoke is not easily affected.
  • a plurality of types of field element 1H having different magnet widths can partially share the magnetizing yoke. can be made smaller.
  • the magnetizing yoke is magnetized along a coupling line that becomes a curved line whose inclination continuously increases toward one direction in the magnet width direction, and a curve cut from the coupling line with an arbitrary magnet width is obtained.
  • a magnet with an arbitrary magnet width can be magnetized by using the magnetic pole boundary line of the magnet with that magnet width.
  • the gradient continuously changes and becomes smooth over the entire magnetic pole boundary line 11H, and the magnet 10H can have a smooth magnetic flux distribution characteristic with less abrupt changes in the magnetic flux from the one end 15 to the other end 16. .
  • the shape of the magnetic pole boundary line 11H on the magnetic pole surface of the magnet 10H is a curved line that is a part of the ellipse 181, so that the length of the short axis of the ellipse 181 is a and the length of the long axis is b. and the relative position of the center point p (Zp, ⁇ p) of the ellipse to the magnet 10H, the inclination shape of the magnetic pole boundary line 11H can be adjusted, and the shape of the magnetic pole boundary line 11H can be easily designed.
  • the outer peripheral surface of the cylindrical magnet which is the magnet included in the field element, is a magnetic pole surface magnetized with a plurality of N poles and a plurality of S poles.
  • the inner peripheral surface of the cylindrical magnet may be the magnetic pole surface.
  • the field element is arranged inside the armature in the electric motor, but if the inner peripheral surface of the cylindrical magnet is the magnetic pole surface, the field element is arranged outside the armature in the electric motor. placed.
  • the field element is the rotor, and the outer peripheral surface of the cylindrical magnet, which is the magnet included in the field element, is a magnetic pole magnetized with a plurality of N poles and a plurality of S poles.
  • the field element may be the stator of a linear motor
  • the magnet provided in the field element may be a rectangular parallelepiped magnet
  • the plane of the surface of the rectangular parallelepiped magnet may be the magnetic pole surface.
  • the first direction would be a linear direction.
  • the electric motor is a rotary electric machine
  • the electric motor may be a linear motor.
  • the field element may be a mover that moves linearly with respect to the stator of the linear motor, in which case the armature of the linear motor, which is an electric motor, serves as the stator.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente invention vise à résoudre le problème suivant : lorsque l'inclinaison d'une ligne de limite polaire 11 augmente à partir d'une extrémité 15 d'un aimant 10 d'un élément de champ 1 à une autre extrémité 16 de celui-ci, la partie d'extrémité du côté de l'autre extrémité 16 au niveau de laquelle l'inclinaison de la ligne de limite polaire 11 de l'aimant 10 est plus grande est sujette aux effets de fuite de flux d'une culasse de magnétisation pendant la magnétisation, et il est donc difficile de magnétiser l'aimant 10 de l'élément de champ 1 avec une grande précision. La solution selon l'invention porte sur un élément de champ 1 caractérisé en ce qu'il comprend : un aimant 10 dans lequel l'inclinaison d'une ligne de limite polaire 11 augmente à partir d'une extrémité 15, avec une proximité croissante, à une autre extrémité 16 dans la direction de la largeur de l'aimant ; une structure de support d'aimant 20 qui est jointe à une partie de fixation d'aimant 17 sur le côté opposé à la surface polaire 14 de l'aimant 10 dans la direction de l'épaisseur de l'aimant et qui supporte l'aimant 10 ; et un élément magnétique 21 qui est constitué d'un matériau magnétique et qui est disposé à l'extérieur du côté de l'autre extrémité 16 de l'aimant 10 dans la direction de la largeur de l'aimant et sur le côté de l'aimant 10 de la structure de support d'aimant 20 dans la direction de l'épaisseur de l'aimant, une partie d'extrémité de l'élément magnétique 21 sur le côté opposé au côté de la structure de support d'aimant 20 dans la direction de l'épaisseur de l'aimant étant positionnée entre la partie de fixation d'aimant 17 et la surface polaire 14 dans la direction de l'épaisseur de l'aimant.
PCT/JP2021/030141 2021-08-18 2021-08-18 Élément de champ et moteur électrique WO2023021600A1 (fr)

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JP2022505626A JP7086318B1 (ja) 2021-08-18 2021-08-18 界磁子および電動機
CN202180097477.4A CN117203879A (zh) 2021-08-18 2021-08-18 励磁元件及电动机
PCT/JP2021/030141 WO2023021600A1 (fr) 2021-08-18 2021-08-18 Élément de champ et moteur électrique

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000312448A (ja) * 1999-04-26 2000-11-07 Seiko Instruments Inc 電動機
JP2004007960A (ja) * 2002-03-29 2004-01-08 Hitachi Metals Ltd 極異方性リング磁石
JP2007016645A (ja) * 2005-07-06 2007-01-25 Matsushita Electric Ind Co Ltd 密閉型圧縮機

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2588661B2 (ja) * 1991-10-16 1997-03-05 株式会社三協精機製作所 ブラシレスモータ
JP3238451B2 (ja) * 1992-02-10 2001-12-17 株式会社東芝 ブラシレスモータ
JP2003169452A (ja) * 2001-12-03 2003-06-13 Daido Steel Co Ltd 永久磁石およびこれを用いた永久磁石形モータ
JP6986337B2 (ja) * 2016-07-15 2021-12-22 株式会社ダイドー電子 可変磁束モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000312448A (ja) * 1999-04-26 2000-11-07 Seiko Instruments Inc 電動機
JP2004007960A (ja) * 2002-03-29 2004-01-08 Hitachi Metals Ltd 極異方性リング磁石
JP2007016645A (ja) * 2005-07-06 2007-01-25 Matsushita Electric Ind Co Ltd 密閉型圧縮機

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