WO2019189217A1 - ロータコア、ロータ、及びモータ - Google Patents

ロータコア、ロータ、及びモータ Download PDF

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Publication number
WO2019189217A1
WO2019189217A1 PCT/JP2019/012930 JP2019012930W WO2019189217A1 WO 2019189217 A1 WO2019189217 A1 WO 2019189217A1 JP 2019012930 W JP2019012930 W JP 2019012930W WO 2019189217 A1 WO2019189217 A1 WO 2019189217A1
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WO
WIPO (PCT)
Prior art keywords
laminated steel
rotor core
steel plate
axial direction
laminated
Prior art date
Application number
PCT/JP2019/012930
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
康晶 中原
武 本田
Original Assignee
日本電産株式会社
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 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201980022048.3A priority Critical patent/CN111919358B/zh
Publication of WO2019189217A1 publication Critical patent/WO2019189217A1/ja

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • the present invention relates to a rotor core, a rotor, and a motor.
  • a conventional electric power steering motor described in Patent Document 1 includes a rotor yoke having an arcuate outer periphery, a magnet embedded in the rotor yoke, and both sides of the short side of the magnet in a virtual plane orthogonal to the central axis. And a flux barrier composed of a through hole penetrating the rotor yoke. With this configuration, the flux barrier can be used to suppress or block the passage of magnetic flux. Therefore, it can be expected that the magnetic flux smoothly flows between the rotor and the stator.
  • Patent Document 1 the conventional electric power steering motor described in Patent Document 1 is concerned that magnetic flux leakage may occur in the region of the steel plate existing between the flux barriers adjacent in the circumferential direction.
  • the electric power steering motor when magnetic flux leakage occurs, a magnetic flux loop is formed inside the rotor core, and there is a concern that the magnetic flux of the magnet cannot be used effectively.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide a rotor core, a rotor, and a motor that can make more effective use of magnetic flux of a magnet.
  • An exemplary rotor core according to the present invention includes a first laminated steel plate and a second laminated steel plate that extend in a radial direction with respect to a central axis, and the first laminated steel plate is a first one located radially outside the central axis.
  • a second laminated steel sheet comprising: a base portion; and a plurality of piece-like portions disposed at a predetermined interval in the circumferential direction and spaced apart from each other through a through portion on a radially outer side of the first base portion.
  • the annular portion has a large-diameter portion and a small-diameter portion having different outer diameters, the large-diameter portion and the small-diameter portion are alternately arranged in the circumferential direction, and a plurality of the first laminated steel plates, One piece of the second laminated steel sheet is laminated in the axial direction, and the piece-like part is a first caulking part protruding in the axial direction.
  • An exemplary rotor of the present invention includes the rotor core configured as described above, and a plurality of magnets arranged in the penetrating portion of the rotor core.
  • the rotor core has a plurality of space portions that are respectively disposed between the through portions adjacent to each other in the circumferential direction.
  • the space portion penetrates the rotor core in the axial direction.
  • the penetrating portion is constituted by the first base portion and the piece-like portion, and the second base portion and the annular portion.
  • An exemplary motor of the present invention has the rotor configured as described above.
  • the magnetic flux of the magnet can be used more effectively.
  • FIG. 1 is a plan view of a motor according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from above.
  • FIG. 3 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from below.
  • FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention.
  • FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention.
  • FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above.
  • FIG. 1 is a plan view of a motor according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from above.
  • FIG. 3 is a
  • FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below.
  • FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention.
  • FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention.
  • FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention.
  • FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 14 is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 15 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top.
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 14 is a top view of the connection laminate
  • FIG. 16 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom.
  • FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention.
  • FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above.
  • FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below.
  • FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention.
  • FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above.
  • FIG. 22 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention viewed from below.
  • FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above.
  • FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below.
  • FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention.
  • FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention.
  • FIG. 32 is a plan view of a first laminated steel sheet according to a modification of the present invention.
  • FIG. 33 is a cross-sectional view of the first caulking portion of the first laminated steel sheet according to the modified example of the present invention.
  • FIG. 34 is a plan view of a second laminated steel sheet according to a modification of the present invention.
  • FIG. 35 is a cross-sectional view of the second caulking portion of the second laminated steel sheet according to the modification of the present invention.
  • FIG. 36 is a plan view of a connected laminated steel sheet according to a modification of the present invention.
  • FIG. 37 is a cross-sectional view of a connection crimping portion of a connection laminated steel sheet according to a modification of the present invention.
  • FIG. 38 is a cross-sectional view of a rotor of a motor according to a modification example of the present invention.
  • FIG. 39 is a partially enlarged view of a cross section of a rotor of a motor according to a modification of the present invention.
  • the direction in which the rotation axis of the motor extends is simply referred to as “axial direction”
  • the direction perpendicular to the rotation axis centered on the rotation axis of the motor is simply referred to as “radial direction”
  • the rotation axis of the motor is the center.
  • the direction along the circular arc is simply called “circumferential direction”.
  • the central axis of the rotor core coincides with the rotation axis of the motor.
  • FIG. 1 is a plan view of a motor according to an embodiment of the present invention.
  • a motor 1 shown in FIG. 1 has a stator 2 and a rotor 3.
  • the stator 2 has, for example, a cylindrical shape that extends in the axial direction.
  • the stator 2 is arranged with a predetermined gap on the radially outer side of the rotor 3.
  • the stator 2 includes a stator core 21, an insulator 22, and a coil 23. *
  • the stator core 21 has a cylindrical shape extending in the axial direction.
  • the stator core 21 is formed by laminating a plurality of magnetic steel plates in the axial direction.
  • the stator core 21 has a core back 21a and teeth (not shown).
  • the core back 21a has an annular shape.
  • the teeth extend radially inward from the inner peripheral surface of the core back 21a.
  • a plurality of teeth are provided side by side at a predetermined interval in the circumferential direction. *
  • the insulator 22 is provided so as to surround the outer surface of the teeth.
  • the insulator 22 is disposed between the stator core 21 and the coil 23.
  • the insulator 22 is made of, for example, an electrically insulating member made of synthetic resin.
  • the coil 23 is formed, for example, by winding a conductive wire around the outer periphery of the insulator 22. *
  • the rotor 3 has a cylindrical shape extending in the axial direction.
  • the rotor 3 is arranged with a predetermined gap on the radially inner side of the stator 2.
  • the rotor 3 includes a shaft 31, a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34.
  • the space portion 33 includes a column portion 33a and an outer peripheral portion 33b.
  • the shaft 31 is a rotating shaft of the motor 1.
  • the shaft 31 has a columnar shape extending in the vertical direction.
  • the shaft 31 is inserted into an upper bearing and a lower bearing (both not shown) provided above and below the rotor 3 and is rotatably supported.
  • the rotor 3 rotates around a shaft 31 extending in the vertical direction.
  • the rotor core 40 has a cylindrical shape extending in the axial direction.
  • the shaft 31 is inserted into the holes 41 d and 42 d located at the radial center of the rotor core 40.
  • the central axis of the rotor core 40 coincides with the shaft 31 of the motor 1.
  • the rotor core 40 is configured by, for example, laminating a plurality of magnetic steel plates in the axial direction. Details of the rotor core 40 will be described later. *
  • the magnet 32 is disposed on the radially inner side of the outer edge portion of the rotor core 40.
  • a plurality of magnets 32 are arranged side by side at a predetermined interval in the circumferential direction. For example, eight magnets 32 are provided.
  • the magnet 32 is a rectangular parallelepiped having a substantially rectangular bottom surface and extending in the axial direction.
  • the axial length of the magnet 32 substantially matches the axial length of the rotor core 40.
  • the magnet 32 is supported by the rotor core 40. *
  • the column part 33a is provided between the magnets 32 adjacent to each other in the circumferential direction. For example, when the number of the magnets 32 is 8, the column part 33a is provided in 8 places.
  • the column portion 33a is a rectangular column-shaped space having a substantially trapezoidal bottom surface and extending in the axial direction.
  • the column part 33a penetrates the rotor core 40 in the axial direction.
  • the outer peripheral part 33b is provided in the radial direction outer side of the pillar part 33a.
  • the outer peripheral part 33b is provided in eight places.
  • the outer peripheral portion 33b is a space having a substantially semicircular bottom surface and extending in the axial direction.
  • the resin part 34 is provided in the space part 33. At the outer edge portion of the rotor 3, the resin portion 34 is synthesized in a space portion 33 surrounded by the outer surface of the rotor core 40 and the inner peripheral surface of a mold (not shown) arranged on the radially outer side of the rotor core 40. It is provided by pouring resin, adhesive, or the like. Thereby, the resin part 34 plays a role as a flux barrier.
  • FIG. 2 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from above.
  • FIG. 3 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from below.
  • FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention.
  • FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 2 and 3 includes a first laminated steel plate 41 and a second laminated steel plate 42.
  • the first laminated steel plate 41 and the second laminated steel plate 42 each expand in the radial direction with respect to the central axis of the rotor core 40.
  • the 1st laminated steel plate 41 shown in FIG. 4 has the 1st base part 41a, the penetration part 41b, and the piece-like part 41c.
  • the first base portion 41a is located on the radially outer side of the central axis.
  • the first base portion 41a has a substantially octagonal outer shape.
  • the first base portion 41a has a hole portion 41d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction.
  • the penetration part 41b is provided on the radially outer side of each of the eight sides of the outer edge part 41w of the first base part 41a.
  • the penetration part 41b is configured as a gap between the first base part 41a and the piece-like part 41c.
  • One magnet 32 is provided for each of the eight through portions 41b (see FIG. 1). *
  • the piece-like portion 41c is arranged on the outer side in the radial direction of the first base portion 41a so as to be separated via the through portion 41b.
  • a plurality of the piece-like portions 41c are arranged at a predetermined interval in the circumferential direction.
  • eight piece-like portions 41c are provided on the radially outer side of each of the eight sides on the outer periphery of the first base portion 41a.
  • the piece-like portion 41 c has a shape in plan view that is centered on the outer side in the radial direction than the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3 and a chord located on the inner side in the radial direction of the arc. And a substantially semicircular shape having a corresponding straight line portion.
  • the straight portion on the radially inner side of the piece-like portion 41c is substantially parallel to the outer edge portion 41w of the first base portion 41a.
  • the first base portion 41a has a convex portion 41e.
  • the convex portion 41e is provided in an angular region between the piece portions 41c adjacent to each other in the circumferential direction with respect to the central axis. That is, the convex portion 41e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each piece-like portion 41c adjacent in the circumferential direction. In other words, the convex portion 41 e is provided on the column portion 33 a of the rotor 3.
  • An example of a fan-shaped angle region between the piece-like portions 41c adjacent to each other in the circumferential direction with respect to the central axis is drawn with a one-dot chain line in FIG. *
  • the convex portion 41e protrudes radially outward from the outer edge portion 41w of the first base portion 41a.
  • convex part 41e protrudes toward the diameter direction outside from each vertex of the 1st base part 41a.
  • the protruding length of the convex portion 41e is shorter than the radial width of the penetrating portion 41b. Since the first base portion 41a has the convex portion 41e, when the magnet 32 is inserted between the first base portion 41a and the piece-like portion 41c, that is, in the through portion 41b, the circumferential direction of the magnet 32 on the convex portion 41e. The ends can be contacted. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed.
  • the second laminated steel plate 42 shown in FIG. 5 has a second base portion 42a, a through portion 42b, and an annular portion 42c.
  • the second base portion 42a is located on the radially outer side of the central axis.
  • the second base portion 42a has a substantially octagonal outer shape.
  • the outer shape of the second base portion 42a is substantially the same as the outer shape of the first base portion 41a.
  • the second base portion 42a has a hole portion 42d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction. *
  • the through portion 42b is provided on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a.
  • the through portion 42b is configured as a gap between the second base portion 42a and a large diameter portion 42f of an annular portion 42c described later.
  • One magnet 32 is provided for each of the eight through portions 42b (see FIG. 1). *
  • the annular portion 42c is arranged on the outer side in the radial direction of the second base portion 42a via the through portion 42b.
  • the annular portion 42c extends in the circumferential direction.
  • the annular portion 42c has the same shape as the shape in which the eight piece-like portions 41c of the first laminated steel plate 41 are connected in an annular shape. *
  • the annular portion 42c has a large diameter portion 42f and a small diameter portion 42g having different outer diameters.
  • the large diameter part 42f and the small diameter part 42g are alternately arranged in the circumferential direction. According to this configuration, magnetic saturation is likely to occur in the small diameter portion 42g. Therefore, the magnetic flux can be efficiently guided, and the occurrence of a magnetic flux loop inside the rotor core 40 can be suppressed.
  • the large diameter portion 42f is disposed at the same position as the piece portion 41 of the first laminated steel plate 41 in the axial direction.
  • the large-diameter portion 42f has a substantially oval shape in plan view, similar to the piece-like portion 41c.
  • the large-diameter portion 42f is provided at eight locations on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a, similarly to the piece-like portion 41c.
  • the linear portion on the radially inner side of the large diameter portion 42f is substantially parallel to the outer peripheral side of the second base portion 42a.
  • the outer diameter of the large diameter part 42f is larger than the outer diameter of the small diameter part 42g. *
  • the small diameter part 42g is arrange
  • the small-diameter portion 42g has a long plate shape in plan view that connects the large-diameter portions 42f adjacent in the circumferential direction.
  • the small diameter portion 42g connects the ends of the two large diameter portions 42f.
  • the outer diameter of the small diameter part 42g is smaller than the outer diameter of the large diameter part 42f. *
  • the small diameter portion 42g has a protruding portion 42h.
  • the protrusion 42h extends radially inward from the inner peripheral surface of the small diameter portion 42g. According to this configuration, the strength of the annular portion 42c can be improved. Further, when the magnet 32 is inserted between the second base portion 42a and the annular portion 42c, that is, in the through portion 42b, the circumferential end portion of the magnet 32 can be brought into contact with the protruding portion 42h. Thereby, it is possible to position the magnet 32 in the circumferential direction. Note that the radial length of the protrusion 42h is shorter than the radial width of the through portion 42b. *
  • two protrusions 42h are provided for one small diameter portion 42g.
  • the two protrusions 42h provided on the small-diameter portion 42g at one location are arranged apart from each other in the circumferential direction. According to this configuration, the region between the two protrusions 42h can be widely used as a flux barrier. Therefore, the magnetic flux of the magnet can be used more effectively.
  • the number of protrusions 42h is not limited to two, and may be one or three or more. *
  • the second base portion 42a has a convex portion 42e.
  • the convex portion 42e is provided in an angle region where the small diameter portion 42g is located with respect to the central axis.
  • the convex part 42e protrudes toward the radial direction outer side from each vertex of the 2nd base part 42a. That is, the convex portion 42e is provided in a fan-shaped region surrounded by both end portions in the circumferential direction of the small diameter portion 42g and the central axis.
  • the convex portion 42 e is provided on the column portion 33 a of the rotor 3.
  • An example of a fan-shaped angle region where the small-diameter portion 42g is located with respect to the central axis is drawn with a one-dot chain line in FIG. *
  • the small-diameter portion 42g is disposed at the same position as the region between the piece-like portions 41c adjacent to each other in the circumferential direction of the first laminated steel plate 41 in the axial direction. Therefore, regarding the rotor core 40, the convex part 42e is provided in the angle area
  • the convex part 42e protrudes radially outward from the outer edge part 42w of the second base part 42a.
  • the tip of the convex portion 42e faces the radially inner side of the small diameter portion 42g.
  • the convex part 42e is arrange
  • the protruding length of the convex part 42e is shorter than the radial width of the through part 42b. Moreover, the convex part 42e does not contact the two projection parts 42h.
  • the second base part 42a has the convex part 42e
  • the magnet 32 when the magnet 32 is inserted between the second base part 42a and the annular part 42c, that is, the through part 42b, the circumferential end of the magnet 32 is provided on the convex part 42e.
  • the parts can be brought into contact. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed.
  • the rotor core 40 shown in FIGS. 2 and 3 is configured by laminating a plurality of first laminated steel plates 41 having the above configuration and at least one second laminated steel plate 42 having the above configuration in the axial direction. At this time, at the position where the piece-like portion 41c of the first laminated steel plate 41 and the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42 overlap in the axial direction and a part of the outer peripheral edge is aligned, The steel plate 41 and the second laminated steel plate 42 are laminated. The first laminated steel plate 41 and the second laminated steel plate 42 are fixed by caulking, for example.
  • the circumferential direction between the first base portion 41a and the piece-like portion 41c of the first laminated steel plate 41 and between the second base portion 42a and the annular portion 42c of the second laminated steel plate 42 is provided. There is no area of the steel plate over the entire area. Thereby, flux barriers, such as an air layer, can be provided between the 1st base part 41a and piece-like part 41c, and between the 2nd base part 42a and annular part 42c. Therefore, the magnetic flux of the magnet 32 can be used more effectively.
  • the number of the second laminated steel plates 42 is smaller than the number of the first laminated steel plates 41, it flows through the annular portion 42 c in the entire rotor core 40 as compared with the case where all of the rotor cores 40 are configured by the second laminated steel plates 42.
  • the amount of magnetic flux can be suppressed. Therefore, the magnetic flux of the magnet 32 in the annular portion 42c can be used more effectively.
  • the rotor core 40 has, for example, two second laminated steel plates 42 arranged at each of the upper end and the lower end in the axial direction, and the upper end in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the second laminated steel plate 42 and the second laminated steel plate 42 at the lower end in the axial direction.
  • the strength of the rotor core 40 can be improved.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction. According to this configuration, the strength of the rotor core 40 can be further improved.
  • the rotor core 40 has a first laminated steel plate 41 disposed at each of an upper end and a lower end in the axial direction, and a plurality of first laminated steel plates 41 between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction.
  • positioned the two laminated steel plates 42 may be sufficient.
  • the upper end and the lower end in the axial direction are first laminated steel plates 41.
  • the rotor core 40 may have a structure of a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, and a plurality of first laminated steel plates 41 in order from the top.
  • the rotor core 40 includes, in order from the top, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, A plurality of first laminated steel plates 41 may be used.
  • the second laminated steel plate 42 is disposed at each of the upper end and the lower end in the axial direction, when the axial length of the magnet 32 is shorter than the axial length of the rotor core 40, it is positioned at the upper end. It is conceivable that the annular portion 42c of the second laminated steel plate 42 is magnetically saturated and the annular portion 42c of the second laminated steel plate 42 located at the lower end is not magnetically saturated. At this time, depending on the presence or absence of magnetic saturation in the annular portion 42c at the upper end and the lower end, the back electromotive force waveform in the coil 23 may have a difference in distortion amount between the upper end and the lower end.
  • the distortion of the counter electromotive voltage waveform can be suppressed by not providing the second laminated steel plate 42 at the upper end and the lower end of the rotor core 40. Instead, a plurality of second laminated steel plates 42 are arranged between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction. While effectively utilizing the magnetic flux, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated.
  • the magnet 32 can be held by pressurizing the annular portion 42c of the second laminated steel plate 42 from the radially outer side. Thereby, since the magnet can be held without providing the resin portion 34, man-hours and materials can be reduced. Furthermore, the column portion 33a can be eliminated by pressurizing the small diameter portion 42g of the annular portion 42c. Thereby, a magnet can be hold
  • FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above.
  • FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below.
  • FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 6 and 7 further includes a connected laminated steel plate 43 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 43 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 43 shown in FIG. 8 has a connection base part 43a, a penetration part 43b, a connection annular part 43c, and a connection part 43k.
  • connection base part 43a, the penetration part 43b, and the connection annular part 43c have the same configuration as the second base part 42a, the penetration part 42b, and the annular part 42c of the second laminated steel plate 42, respectively. That is, the connection base part 43a has the hole part 43d and the convex part 43e.
  • the through portion 43b is configured as a gap between the connection base portion 43a and the large diameter portion 43f of the connection annular portion 43c.
  • the connecting annular portion 43c has different outer diameters and includes large-diameter portions 43f and small-diameter portions 43g that are alternately arranged in the circumferential direction. *
  • the convex part 43e of the connection laminated steel plate 43 is larger on the both sides in the circumferential direction than the convex part 41e of the first laminated steel plate 41 and the convex part 42e of the second laminated steel plate 42. And a part of convex part 43e of the connection laminated steel plate 43 overlaps with them under the penetration part 41b of the 1st lamination steel plate 41, and the penetration part 42b of the 2nd lamination steel plate 42. FIG. Thereby, the magnet 32 inserted in the penetration part 41b and the penetration part 42b is hooked on the convex part 43e. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
  • the connecting portion 43k is disposed in a region between the connecting base portion 43a and the connecting annular portion 43c with respect to the radial direction.
  • the connecting portions 43k are arranged side by side at a predetermined interval in the circumferential direction.
  • the connection part 43k is arrange
  • the connecting portion 43k has a long plate shape in plan view extending in the radial direction.
  • the connecting portion 43k connects the connecting base portion 43a and the connecting annular portion 43c. More specifically, the connecting portion 43k connects the radial tip end portion of the convex portion 43e and the inner edge portion of the small diameter portion 43g. *
  • the small diameter portion 43g includes two connection portions 43m.
  • the connecting portion 43m is provided adjacent to both sides in the circumferential direction of the connecting portion 43k. That is, the small-diameter portion 43g has two connection portions 43m adjacent to each other in the circumferential direction with respect to one connection portion 43k connected to the inner edge portion.
  • the connecting portion 43m is connected to the large diameter portion 43f on the opposite side of the connecting region with the connecting portion 43k.
  • one connected laminated steel plate 43 is disposed at the lower end in the axial direction.
  • the piece-like portion 41 c of the first laminated steel plate 41, the large-diameter portion 42 f of the annular portion 42 c of the second laminated steel plate 42, and the large-diameter portion 43 f of the connected annular portion 43 c of the connected laminated steel plate 43 are axial.
  • the first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 43 are laminated at a position where the outer edge portions are overlapped with each other.
  • the strength of the rotor core 40 can be further improved. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated.
  • the connected laminated steel plates 43 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 43 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the connected laminated steel plate 43 at the upper end and the connected laminated steel plate 43 at the lower end may have different shapes. For example, the upper end may be a connected laminated steel plate 43 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 43 that prevents the magnet 32 from falling off. *
  • FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to the components common to those embodiments. The description may be omitted.
  • connection laminated steel plate 43 shown in FIG. 9 has a small diameter portion 43g, and each of the two connection portions 43m adjacent to the one connection portion 43k in the circumferential direction has a large diameter portion 43f. Disconnected from.
  • the connection part 43m is cut
  • the rotor core 40 according to the third embodiment has a structure in which laminated steel plates obtained by cutting the connection portions 43m of the connected laminated steel plates 43 are laminated in the axial direction. *
  • the connecting portion 43m is cut at a location close to the large diameter portion 43f.
  • the cut connection part 43m is bent inward in the radial direction.
  • the bent connection part 43m is adjacent to the penetrating part 43b side of the connecting part 43k.
  • FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention.
  • the manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of laminating
  • the connected laminated steel plates 43 are laminated from the upper end to the lower end in the axial direction.
  • the rotor core 40 of 3rd Embodiment is comprised only with the laminated steel plate from which the connection part 43m of the connection laminated steel plate 43 was cut
  • it is a process including the connection laminated steel plate 43 you may laminate
  • the manufacturing method of the rotor core 40 according to the third embodiment includes a step of cutting the connection portion 43m.
  • a cutting device 100 shown in FIG. 10 is used. *
  • the cutting device 100 includes a pedestal 101, a pressing member 102, and a cutting tool 103.
  • the rotor core 40 is placed on the upper surface of the pedestal portion 101 with the axial direction being substantially vertical.
  • a pressing member 102 is disposed above the rotor core 40.
  • the pressing member 102 holds the rotor core 40 between the upper surface of the pedestal portion 101.
  • the cutting tool 103 is arrange
  • the cutting tool 103 can move along the radial direction of the rotor core 40.
  • the cutting tool 103 can press the outer peripheral surface of the rotor core 40 with the tip portion facing the outer peripheral surface of the rotor core 40. *
  • the cutting tool 103 has a blade portion 103 a shown in FIG. 11 at the tip portion facing the outer peripheral surface of the rotor core 40.
  • the blade portion 103 a extends along the axial direction of the rotor core 40.
  • the blade part 103a is provided in two places spaced apart in the circumferential direction.
  • Each of the two blade portions 103a has a corner portion 103b and a flat surface portion 103c on the outer surface on the outer side in the circumferential direction.
  • the two blade portions 103a respectively cut the two connection portions 43m from the large diameter portion 43f by the corner portion 103b and the flat portion 103c.
  • the manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of cut
  • the state connected in the circumferential direction can be eliminated.
  • disconnection can be suppressed. Therefore, it is possible to suppress the occurrence of a magnetic loop in the rotor core 40.
  • the connected laminated steel plate 43 is cut from the radially outer side to the inner side.
  • the high output press apparatus is not required, but the connection part 43m of the connection annular part 43c can be cut
  • FIG. Therefore, it is possible to suppress an increase in the size and cost of the manufacturing apparatus for the rotor core 40.
  • the manufacturing method of the modification of the rotor core 40 of 2nd Embodiment can shape
  • the manufacturing method of the modified example of the rotor core 40 of the second embodiment cuts from the radially outer side. Therefore, in the laminated steel sheet at the lower end in the axial direction of the rotor core 40, the cutting distance necessary for cutting is shortened. And generation of burrs can be prevented.
  • the method for manufacturing the rotor core 40 of the third embodiment may include a step of removing the connecting portion 43k.
  • production of the magnetic saturation which may generate
  • the structure of the said cutting device 100 demonstrated using FIG.10 and FIG.11 is an example, and another structure may be sufficient if it can cut
  • FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • the cutting tool 103 shown in FIG. 11 is used in the first example of the step of cutting the connection portion 43m.
  • this cutting step shown in FIG. 12 two connecting portions 43m adjacent to each other in the circumferential direction in one connecting portion 43k are cut simultaneously.
  • the two cut connection portions 43m are each bent toward the inside in the radial direction.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • the two connecting portions 43m adjacent in the circumferential direction in the next one connecting portion 43k are simultaneously cut and bent.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Moreover, at the time of cutting
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core 40 which concerns on 3rd Embodiment of this invention.
  • a cutting tool 104 having only one blade portion 103a is used (see FIG. 13).
  • this cutting step shown in FIG. 13 two connecting portions 43m on the inner side in the circumferential direction are simultaneously cut with respect to the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c.
  • Each of the two cut connection portions 43m is bent, for example, radially inward.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • two connecting portions 43m on the inner side in the circumferential direction with respect to the two connecting portions 43k adjacent in the next circumferential direction are simultaneously cut and bent.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Further, it is possible to make the shape and size of the large-diameter portion 43f, which is a region between the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c uniform.
  • FIG. 14 is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • a cutting tool 104 having only one blade portion 103a is used (see FIG. 14).
  • the two connection portions 43 m disposed on the opposite sides with the central axis being separated from each other are simultaneously cut.
  • Each of the two cut connection portions 43m is bent, for example, radially inward.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • the two connection portions 43m arranged next to each other on the opposite sides with the central axis are cut and bent at the same time.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portion 43m since the two connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum.
  • FIG. 15 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top.
  • FIG. 16 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom.
  • FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to components common to those embodiments. The description thereof may be omitted.
  • the rotor core 40 shown in FIGS. 15 and 16 further includes a connected laminated steel plate 44 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the coupled laminated steel plate 44 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 44 shown in FIG. 17 includes a connection base portion 44a, a through portion 44b, a connection piece-like portion 44c, and a connection portion 44k.
  • connection base portion 44a has a recess 44e.
  • the concave portion 44e is provided in an angular region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis. That is, the concave portion 44e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each of the connecting piece-like portions 44c adjacent in the circumferential direction. In other words, the concave portion 44 e is provided in the column portion 33 a of the rotor 3. An example of a fan-shaped angle region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis is depicted by a one-dot chain line in FIG. *
  • the recess 44e is recessed radially inward from the outer edge 44w of the connection base portion 44a.
  • the connection base part 44a is polygonal, the recessed part 44e is dented toward the radial inner side from each vertex of the connection base part 44a.
  • the connecting base portion 44a has the recess 44e, the magnet 32 is inserted into the through portions 41b and 42b, and then the synthetic resin and the adhesive are bonded to the outer sides in the radial direction of the first base portion 41a, the second base portion 42a, and the connecting base portion 44a.
  • an agent or the like is poured, a synthetic resin, an adhesive, or the like enters the recess 44e. Thereby, the connection piece-like part 44c and the magnet 32 can be firmly fixed.
  • the through portion 44b is configured as a gap between the connection base portion 44a and the connection piece portion 44c.
  • Connecting portions 44k are provided on both sides of the through portion 44b in the circumferential direction.
  • the connecting portion 44k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42.
  • the connecting piece-like portion 44c is arranged on the outer side in the radial direction of the connecting base portion 44a so as to be separated via the through portion 44b.
  • the separation mentioned here includes a form in which the connecting piece-like portion 44c and the connecting base portion 44a are partially connected by the connecting portion 44k.
  • eight connecting piece portions 44c are arranged at predetermined intervals in the circumferential direction.
  • the connecting piece-like portion 44c has a plan view shape whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located on the radially inner side of the arc. And a substantially semicircular shape having a straight line portion corresponding to.
  • the straight portion on the radially inner side of the connecting piece-like portion 44c is substantially parallel to the outer edge portion 44w of the connecting base portion 44a.
  • the connecting portion 44k is disposed in a region between the connecting base portion 44a and the connecting piece-like portion 44c in the radial direction.
  • the connecting portion 44k is provided at each of both ends in the circumferential direction of the connecting piece-like portion 44c with respect to one connecting piece-like portion 44c, and extends in parallel with each other.
  • the connecting portion 44k has a long plate shape in plan view extending in a substantially radial direction.
  • the connecting portion 44k connects the connecting base portion 44a and the connecting piece-like portion 44c. More specifically, the connecting portion 44k connects both circumferential regions of the recessed portion 44e and the straight portions at both ends of the connecting piece-like portion 44c in the circumferential direction.
  • the rotor core 40 shown in FIGS. 15 and 16 includes, for example, two second laminated steel plates 42 disposed at each of the upper end and the lower portion in the axial direction, and the second laminated steel plate 42 at the upper end in the axial direction and the second laminated steel plate 42 at the lower portion in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction.
  • one connected laminated steel plate 44 is disposed at the lower end in the axial direction.
  • the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 44c of the connected laminated steel plate 44 overlap in the axial direction.
  • the 1st laminated steel plate 41, the 2nd laminated steel plate 42, and the connection laminated steel plate 44 are laminated
  • the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 44k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
  • the connected laminated steel plate 44 may be disposed at the upper end in the axial direction of the rotor core 40. Further, the connected laminated steel plates 44 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 44 and the lower end connected laminated steel plates 44 may have different shapes. For example, the upper end may be a connected laminated steel plate 44 having a through portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 44 that prevents the magnet 32 from falling off. *
  • the first laminated steel plate 41 has a convex portion 41e
  • the second laminated steel plate 42 has a convex portion 42e
  • the connected laminated steel plate 44 has a concave portion 44e.
  • FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above.
  • FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below.
  • FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first, second, and third embodiments described above, the same reference numerals or the same names are used for the components common to those embodiments. The description may be omitted.
  • the rotor core 40 shown in FIGS. 18 and 19 further includes a connected laminated steel plate 45 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 45 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 45 shown in FIG. 20 has a connection base part 45a, a penetration part 45b, a connection piece part 45c, and a connection part 45k.
  • connection base part 45a, the penetration part 45b, and the connection piece 45c have the same configurations as the connection base part 44a, the penetration part 44b, and the connection piece 44c of the connection laminated steel sheet 44 of the fourth embodiment. That is, the connection base part 45a has the hole part 45d and the recessed part 45e.
  • the through portion 45b is configured as a gap between the connection base portion 45a and the connection piece portion 45c.
  • Connecting portions 45k are provided on both sides of the through portion 45b in the circumferential direction.
  • the connecting portion 45k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42.
  • the connecting piece-like portion 45c is arranged on the outer side in the radial direction of the connecting base portion 45a via a through portion 45b.
  • the separation referred to here includes a form in which the connecting piece 45c and the connecting base 45a are partially connected by the connecting portion 45k.
  • eight connecting piece portions 45c are arranged at predetermined intervals in the circumferential direction.
  • the connecting piece-like portion 45c has a shape in plan view whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located radially inward of the arc. And a substantially semicircular shape having a straight line portion corresponding to.
  • the straight line portion on the radially inner side of the connecting piece 45c is substantially parallel to the outer edge 45w of the connecting base portion 45a.
  • the connecting portion 45k is arranged in a region between the connecting base portion 45a and the connecting piece-like portion 45c in the radial direction.
  • the connecting portions 45k are provided at two locations on the inner side of both ends of the connecting piece-like portion 45c in the circumferential direction in the straight portion of the connecting piece-like portion 45c at one place, and extend in parallel with each other.
  • the connecting portion 45k connects the outer edge portion 45w of the connecting base portion 45a and the straight portion of the connecting piece-like portion 45c.
  • the connecting portion 45k has a long plate shape in plan view extending in a substantially radial direction. *
  • two second laminated steel plates 42 are disposed at each of the upper end and the lower portion in the axial direction, the second laminated steel plate 42 at the upper end in the axial direction, and the second laminated steel plate 42 at the lower portion in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction.
  • one connected laminated steel plate 45 is disposed at the lower end in the axial direction.
  • the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction, and the outer edge
  • the first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 45 are laminated at a position where a part of the parts are aligned.
  • the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 45k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
  • the connected laminated steel plates 45 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 45 may be disposed at both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 45 and the lower end connected laminated steel plates 45 may have different shapes. For example, the upper end may be a connected laminated steel plate 45 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 45 that prevents the magnet 32 from falling off. *
  • the first laminated steel plate 41 has a convex portion 41e
  • the second laminated steel plate 42 has a convex portion 42e
  • the connected laminated steel plate 45 has a concave portion 45e.
  • FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above.
  • FIG. 22 is a perspective view of the first modification of the rotor core according to the fifth embodiment of the present invention viewed from below.
  • the rotor core 40 shown in FIG.21 and FIG.22 has the connection laminated steel plate 45 further in addition to the 1st laminated steel plate 41 and the 2nd laminated steel plate 42.
  • FIG. The connected laminated steel plate 45 is disposed at the lower end in the axial direction of the rotor core 40.
  • connection laminated steel plate 45 has the connection part 45k as an interposition part interposed between the connection base part 45a and the connection piece-like part 45c.
  • the intervening portion referred to here includes an outward projection provided on the connection base portion 45a, an inward projection provided on the connection piece 45c, and a connection base portion 45a and a connection piece shape. It includes a form in which the space between the portion 45c is filled with a steel plate member.
  • the magnet 32 inserted into the through part 41 b and the through part 42 b is caught by the interposition part in the lower part of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. Further, since the connecting base portion 45a and the connecting piece-like portion 45c are connected via the connecting portion 45k, the first base portion 41a and the piece-like portion 41c are also connected to the second base portion 42a and the annular portion 42c. However, it is possible to prevent it from falling apart. *
  • the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40 includes an outward projection 42 n.
  • the outward projecting portion 42n extends radially outward from the outer edge portion 42w of the second base portion 42a.
  • the protruding length of the outward projecting portion 42n is shorter than the radial width of the penetrating portion 42b.
  • the magnet 32 is inserted into the through portion 41 b and the through portion 42 b below the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40. *
  • the magnet 32 is caught by the outward projecting portion 42 n at the upper portion of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40.
  • FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • connection laminated steel plate 45 is arrange
  • the connection laminated steel plate 45 is arrange
  • the connecting portion 45 k of the connecting laminated steel plate 45 at the upper end in the axial direction is cut from the upper side in the axial direction of the connecting laminated steel plate 45 toward the inside with respect to the laminated laminated steel plate 45.
  • the cut connection part 45k is bent toward the inside of the through part 45b.
  • the outward projecting portion 45n can be formed by cutting the connecting portion 45k. Note that the inward projection may be formed by a similar cutting process.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of laminating
  • the divided laminated steel plate corresponds to the first laminated steel plate 41 in which the first base portion 41a and the piece-like portion 41c are divided in the radial direction.
  • a plurality of first laminated steel plates 41 are laminated in the axial direction.
  • the rotor core 40 also includes a plurality of second laminated steel plates 42 having a smaller number of laminated sheets than the first laminated steel plates 41. *
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of further laminating
  • FIG. In this step the laminated laminated steel plate 45 in which the coupling base 45a and the coupling piece 45c are connected via the coupling portion 45k is laminated on the upper end in the axial direction of the laminated first laminated steel plate 41.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment is the connection laminated steel plate 45 (interposition) in which the connection part 45k which is an interposition part interposes between the connection base part 45a and the connection piece-like part 45c.
  • laminated steel sheet (Laminated steel sheet) is laminated on the lower end of the laminated first laminated steel sheet 41 in the axial direction.
  • the first laminated steel sheet 41c and the connecting laminated steel sheet 45 are connected to each other in a position where the piece-like portion 41c of the first laminated steel plate 41 and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction. 41 and the laminated laminated steel plate 45 are laminated.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of cut
  • FIG. In this step the connecting member 45k is cut by the cutting member 200 by inserting the cutting member 200 into the penetrating portion 45b (not shown) of the connected laminated steel plate 45 shown in FIGS. Thereby, the state where the connection base part 45a and the connection piece-like part 45c were connected can be eliminated. Therefore, a flux barrier such as an air layer can be provided between the connection base portion 45a and the connection piece 45c. Thereby, it is possible to reduce a magnetic flux loop. *
  • the cutting member 200 shown in FIG. 23 is made of, for example, metal, and is a rectangular parallelepiped extending in the axial direction, like the magnet 32, having a rectangular cross-sectional shape that intersects the axial direction.
  • a magnet 32 may be used as the cutting member.
  • a member to be used can be reduced and the man-hours until the rotor 3 is formed can be reduced.
  • the fastening strength can be improved.
  • the edge portion on the radially outer side of the cutting member 200 matches the connecting portion with the connecting piece 45c of the connecting portion 45k in the radial direction of the rotor core 40.
  • the cutting member 200 is disposed above the position in the axial direction. *
  • the rotor core 40 has a through portion 50.
  • the penetrating part 50 includes a penetrating part 41b of the first laminated steel sheet 41 and a penetrating part 42b of the second laminated steel sheet 42 that overlap each other in the axial direction, and extends in the axial direction.
  • the penetration part 50 includes a first penetration part 51 and a second penetration part 52.
  • the second penetrating part 52 is narrower in the radial direction than the first penetrating part 51.
  • the second penetrating portion 52 has a radial width that can accommodate only the magnet 32.
  • the first penetrating portion 51 is wider in the radial direction than the second penetrating portion 52.
  • the first penetrating portion 51 has a radial width that can accommodate an outward projecting portion 45n described later in addition to the magnet 32. *
  • the first penetrating portion 51 is formed as a penetrating portion 41b of the predetermined number of first laminated steel plates 41 and a penetrating portion 42b of the second laminated steel plate 42, which are laminated adjacent to the lower surface of the connected laminated steel plates 45 in the upper part of the rotor core 40.
  • the 2nd penetration part 52 is lower than the 1st lamination steel plate 41 and the 2nd lamination steel plate 42 in which the 1st penetration part 51 was provided, penetration part 41b of the 1st lamination steel plate 41, and penetration part of the 2nd lamination steel plate 42 42b is provided. *
  • connection part 45k is cut
  • the cut connection part 45k becomes an outward projection 45n of the connection base part 45a.
  • the outward projection 45n extends radially outward from the outer edge 45w of the connection base portion 45a.
  • the outward projecting portion 45 n is a portion of the base with the connection base portion 45 a and bends toward the first through portion 51. *
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of inserting the magnet 32 in the penetration part 50.
  • the magnet 32 is used as a cutting member, the magnet 32 is continuously inserted in the penetration part 50, after cut
  • the magnet 32 is a connecting portion that is an interposed portion of the laminated laminated steel plate 45 at the lower end in the axial direction at the final stage of insertion into the through portion 50.
  • the upper surface of the part 45k is contacted.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of forming the resin part 34.
  • the resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33.
  • connection laminated steel plate 45 arranged at the upper end in the axial direction has an outward projection 45n extending radially outward from the outer edge 45w of the connection base portion 45a.
  • a flux barrier such as an air layer or a resin layer 34 can be provided between the connection base portion 45 a and the connection piece 45 c of the connection laminated steel plate 45.
  • the magnetic flux of the magnet 32 can be used more effectively.
  • the outward projecting portion 45n that is, before cutting the connecting portion 45k, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c are separated. This can be prevented.
  • the rotor core 40 may be provided with inward protrusions extending radially inward from the inner edge of the connecting piece 45c instead of the outward protrusion 45n. Further, the rotor core 40 may be provided with both the outward projection 45n and the inward projection.
  • the elastic force presses the magnet 32 outward in the radial direction.
  • positioning in the radial direction of the magnet 32 can be performed.
  • the action of fixing the magnet 32 to the rotor core 40 can be enhanced.
  • a part of the outward projecting portion 45n that is bent is accommodated inside the first through portion 51, so that the insertion of the magnet 32 into the through portion 50 is not obstructed. Therefore, a space for inserting the magnet 32 can be secured in the through portion 50.
  • the thickness of the axial direction of the connection part 45k is connected to the connection base part 45a and connection. You may decide to include the process made thinner than the piece-like part 45c. According to this configuration, the connecting portion 45k can be easily cut. For example, press working may be performed. According to this structure, the form which can cut
  • the connecting portion 45k can be easily cut. For example, push back processing may be performed. According to this structure, the form which can cut
  • FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above.
  • FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below.
  • FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 26 and 27 includes a first laminated steel plate 46 and a second laminated steel plate 47.
  • the first laminated steel plate 46 and the second laminated steel plate 47 each expand in the radial direction with respect to the central axis of the rotor core 40.
  • a first laminated steel plate 46 shown in FIG. 28 has a first base portion 46a, a through portion 46b, and a piece-like portion 46c.
  • the first base portion 46a has a hole 46d and a recess 46e.
  • the second laminated steel plate 47 shown in FIG. 29 has a second base portion 47a, a penetrating portion 47b, and an annular portion 47c.
  • the second base part 47a has a hole 47d and a recess 47e.
  • the annular portion 47c has a large diameter portion 47f and a small diameter portion 47g having different outer diameters.
  • the rotor core 40 shown in FIGS. 26 and 27 is configured by laminating a plurality of first laminated steel plates 46 having the above configuration and at least one second laminated steel plate 47 having the above configuration in the axial direction. At this time, the first laminated steel sheet 46c and the large-diameter part 47f of the annular portion 47c of the second laminated steel sheet 47 overlap in the axial direction, and the first laminated steel sheet 46 is located at a position where a part of the outer peripheral edge is aligned. A steel plate 46 and a second laminated steel plate 47 are laminated.
  • annular part 47c is provided. There is no area of the steel plate over the entire area. Thereby, a flux barrier such as an air layer can be provided between the first base portion 46a and the piece-like portion 46c and between the second base portion 47a and the annular portion 47c. Therefore, the magnetic flux of the magnet 32 can be used more effectively.
  • the whole of the rotor core 40 flows through the annular portion 47 c in the entire rotor core 40 as compared with the case where the second laminated steel plates 47 are configured.
  • the amount of magnetic flux can be suppressed. Therefore, the occurrence of magnetic saturation in the annular portion 47c is suppressed, and the magnetic flux of the magnet 32 can be used more effectively.
  • FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention.
  • FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those in the first embodiment are assigned to the same constituent elements as those of the first embodiment, and the description thereof is omitted. May be omitted.
  • the rotor 3 shown in FIGS. 30 and 31 has a cylindrical shape extending in the axial direction.
  • the rotor 3 is arranged with a predetermined gap inside the stator 2 (see FIG. 1) in the radial direction.
  • the rotor 3 includes a shaft 31 (not shown), a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34. *
  • the resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33. Thereby, the resin part 34 plays a role as a flux barrier. Further, since both circumferential ends of the magnet 32 are in contact with the resin portion 34, the magnet 32 can be firmly fixed to the rotor core 40. *
  • the rotor core 40 has a first laminated steel plate 46.
  • the 1st laminated steel plate 46 has the 1st base part 46a, the penetration part 46b, and the piece-like part 46c.
  • the first base portion 46a has a hole 46d and a recess 46e. *
  • the through portion 46b is configured as a gap between the first base portion 46a and the piece-like portion 46c.
  • One magnet 32 is provided in each of the eight through portions 46b.
  • Eight column portions 33a are disposed between the through portions 46b (magnets 32) adjacent to each other in the circumferential direction, and penetrate the rotor core 40 in the axial direction.
  • the circumferential length L1 of the piece-like portion 46c shown in FIG. 31 is shorter than the circumferential length L2 of the magnet 32. According to this configuration, the magnetic characteristics related to the cogging torque can be improved. Therefore, the cogging torque can be reduced. Furthermore, the occurrence of a magnetic flux loop in the rotor core 40 can be suppressed.
  • the recess 46e is provided in an angular region between the pieces 46c adjacent to each other in the circumferential direction with respect to the central axis.
  • the recess 46e is recessed radially inward from the outer edge 46w of the first base portion 46a.
  • annular portions 42c and 47c and the connecting annular portion 43c described in the above embodiment are in a shape that is annularly connected over the entire circumference, but even if a portion of the circumferential direction is locally interrupted. good. *
  • connection laminated steel plate was arrange
  • positioning a connection laminated steel plate to both the lower end and upper end of an axial direction you may arrange
  • the present invention can also be applied to a claw pole type stator or the like as the stator according to the embodiment of the present invention.
  • the 1st laminated steel plate, the 2nd laminated steel plate, and a connection laminated steel plate may have the crimping part which protrudes in the axial direction formed of caulking etc.
  • FIG. 32 is a plan view of the first laminated steel sheet.
  • FIG. 33 is a cross-sectional view of a first caulking portion to be described later.
  • each piece-like portion 341c is formed with a first caulking portion 341p.
  • the first caulking portion 341p includes a first convex portion 341p1 that protrudes to one side in the axial direction and a first concave portion 341p2 that is located on the other side in the axial direction of the first convex portion.
  • the first caulking portion 341p is located substantially at the center in the radial direction and the circumferential direction of the piece-like portion 341c. That is, the 1st convex part 341p1 and the 2nd recessed part 341p2 are located in the approximate center in the radial direction of the piece-shaped part 341c, and the circumferential direction.
  • FIG. 34 is a plan view of the second laminated steel sheet.
  • FIG. 35 is a cross-sectional view of a second caulking portion to be described later.
  • a second crimping portion 342p is formed in each large diameter portion 342c.
  • the second caulking portion 342p includes a second convex portion 342p that protrudes on one side in the axial direction and a second concave portion 342p2 that is located on the other side in the axial direction of the second convex portion 342p.
  • the second caulking portion 342p is disposed approximately at the center in the radial direction and the circumferential direction of the large diameter portion 342c. That is, the 2nd convex part 342p1 and the 2nd recessed part 342p2 are arrange
  • FIG. 36 is a plan view of a connected laminated steel sheet.
  • FIG. 37 is a cross-sectional view of a connecting caulking portion to be described later.
  • each large-diameter portion 345c is formed with a connected crimping portion 345p.
  • the connection crimping part 345p has a connection convex part 345p1 protruding to one side in the axial direction and a connection concave part 345p2 located on the other side in the axial direction of the connection convex part 345p1.
  • connection crimping part 345p is arrange
  • the circumferential direction and radial position of the first crimping portion 341p are substantially the same as the circumferential direction and radial position of the second crimping portion 342p. is there.
  • the first caulking portion 341p overlaps the second caulking portion 342p in the axial direction. More specifically, the first convex portion 341p1 of the first caulking portion 341p fits into the second concave portion 342p2 of the second caulking portion. Alternatively, the second convex portion 342p1 of the second caulking portion 342 is fitted into the first concave portion 341p2 of the first caulking portion 341p. Thereby, the 1st laminated steel plate 341 and the 2nd laminated steel plate 342 can be firmly fixed. *
  • the 1st crimping part 341p of the 1st laminated steel plate 341 adjacent to an axial direction overlaps with an axial direction. That is, the first convex portion 341p1 of the first laminated steel plate 341 located on the other axial side is fitted into the first concave portion 341p2 of the first laminated steel plate 341 located on the one axial side. Thereby, adjacent 1st laminated steel plates 341 can be firmly fixed.
  • the second caulking portions 342p of the second laminated steel plates 342 adjacent in the axial direction overlap with each other in the axial direction. That is, the second convex portion 342p1 located on the other axial side is fitted into the second concave portion 342p2 of the second laminated steel plate 342 located on the one axial side. Thereby, several 2nd laminated steel plates 342 can be firmly fixed.
  • the circumferential and radial positions of the coupled caulking portion 345p are substantially the same as the circumferential and radial positions of the first caulking portion.
  • the connecting caulking portion 345p overlaps the first caulking portion 341p in the axial direction.
  • the connection convex part of the connection crimping part 345p fits into the 1st recessed part 341p2 of the 1st crimping part 341p.
  • the first convex portion 341p1 of the first caulking portion 341 is fitted into the connecting concave portion 345p2 of the connecting caulking portion 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the first laminated steel plate 341.
  • the circumferential and radial positions of the coupled crimping portion 345p are substantially the same as the circumferential and radial positions of the second crimping portion 342p.
  • the connecting caulking portion 345p overlaps the second caulking portion 342p in the axial direction. More specifically, the connecting convex portion 345p1 of the connecting caulking portion 345p fits into the second concave portion 342p2 of the second caulking portion 342p. Or the 2nd convex part 342p1 of the 2nd crimping part 342 fits in the connection recessed part 345p2 of the coupling crimping part 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the second laminated steel plate 342. *
  • connection laminated steel plates 345 When the connection laminated steel plates 345 are laminated in the axial direction, the connection crimping portions 345p of the connection lamination steel plates 345 adjacent in the axial direction overlap each other in the axial direction. That is, the connecting convex portion 345p1 located on the other axial side is fitted into the connecting concave portion 345p2 of the laminated laminated steel plate 345 located on the one axial side. Thereby, the some connection laminated steel plates 345 can be firmly fixed.
  • the outer shape of the first caulking part 341p, the second caulking part 342p, and the connecting caulking part 345p is, for example, an oval shape or a rectangle with the circumferential direction as the longitudinal direction. That is, the piece-like portion 341c and the large-diameter portion 342c have a shape extending with the circumferential direction as the longitudinal direction.
  • the outer shape of the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p into a shape in which the circumferential direction is the longitudinal direction, the number of caulking in each piece-like portion 341c and the large diameter portion 342c is increased. Even if there is only one, the first laminated steel sheets 341, the second laminated steel sheets 342, the first laminated steel sheets 341 and the second laminated steel sheets 342, the connected laminated steel sheets 345, the first laminated steel sheets 341, and the connected laminated steel sheets 345 And the second laminated steel plate 342 or the connected laminated steel plates 345 can be firmly fixed.
  • FIG. 38 is a cross-sectional view of the rotor core 40.
  • FIG. 39 is a partial cross-sectional view of a rotor core including a through portion.
  • one or more second laminated steel plates 342 are stacked on one or more connected laminated steel plates 345 (one axial end side).
  • a plurality of first laminated steel plates 341 are laminated.
  • One or more second laminated steel plates 342 are laminated on the laminated first laminated steel plates 341.
  • a plurality of first laminated steel plates 341 are laminated on the second laminated steel plate 342.
  • One or more second laminated steel sheets 342 are further laminated on the laminated first laminated steel sheets 341.
  • first laminated steel sheets 341 sandwiched between the second laminated steel plates 342 are laminated in the axial direction.
  • the number of first laminated steel sheets 341 sandwiched between the second laminated steel sheets in the axial direction is, for example, about 3 to 10.
  • the thickness of the first laminated steel sheet 341 and the second laminated steel sheet is, for example, about 0.5 to 1.5 mm.
  • connection laminated steel plate 345 arrange
  • positioned at an axial direction other end side does not need to have the connection crimping part 345p.
  • first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 penetrate through the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p in the axial direction.
  • a groove may be formed.
  • a first through groove 341r is formed in the inner wall on the radially inner side of the piece-like portion 341c of the first laminated steel plate 341.
  • the first through groove 341r is recessed toward the radially outer side.
  • the first through groove 341r penetrates the first laminated steel plate 341 in the axial direction.
  • the first through groove 341r communicates with the through part 341b in the radial direction.
  • the first through groove 341r is located at a part of the inner wall constituting the through part 341b.
  • the inner wall constituting the first through groove 341r faces the outer surface of the first base portion 341a in the radial direction.
  • the outer shape of the opening of the first through groove 341r is a shape whose longitudinal direction is the circumferential direction.
  • the outer shape of the first through groove 341r may be a substantially C-shape that opens radially inward.
  • the outer shape of the first through groove 341r is substantially rectangular.
  • a second through groove 342r is formed on the inner wall on the radially inner side of the large-diameter portion 342c of the second laminated steel plate 342 so as to be recessed toward the radially outer side.
  • the second through groove 342r penetrates the second laminated steel plate 342 in the axial direction.
  • the second through groove 342r communicates with the through portion 342b in the radial direction.
  • the second through groove 342r is located at a part of the inner wall constituting the through portion 342b.
  • the inner wall constituting the second through groove 342r faces the outer surface of the second base portion 342a in the radial direction.
  • the outer shape of the opening of the second through groove 342r is a shape whose longitudinal direction is the circumferential direction. Note that when viewed from the axial direction, the outer shape of the opening of the second through groove 342r may be a substantially C-shape that opens radially inward. In the present embodiment, when viewed from the radial direction, the outer shape of the second through groove 342r is substantially rectangular.
  • a connecting through groove 345r that is recessed toward the radially outer side is formed in the inner wall on the radially inner side of the large diameter portion 345c of the connected laminated steel plate 345.
  • the connection through groove 345r penetrates the connection laminated steel plate 345 in the axial direction.
  • the connecting through groove 345r communicates with the through portion 345b in the radial direction.
  • the outer shape of the connecting through groove 345r is a shape whose longitudinal direction is the circumferential direction.
  • the outer shape of the opening of the coupling through groove 345r may be a substantially C-shape that opens radially inward.
  • the outer shape of the coupling through groove 345r is substantially rectangular when viewed from the radial direction.
  • the circumferential direction and the radial direction of the first through groove 341r, the second through groove 342r, and the connected through groove 345r are the same.
  • the 1st laminated steel plate 341, the 2nd laminated steel plate 342, and the connection lamination steel plate 345 are laminated, the 1st penetration slot 341r, the 2nd penetration slot 342r, and the connection penetration slot 345r overlap in the direction of an axis.
  • the first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 do not necessarily need to have the first through groove 341r, the second through groove 342r, and the connected through groove 345r, respectively.
  • Various laminated steel plates may not have each through groove.
  • a laminated steel sheet having a through groove and a laminated steel sheet not having a through groove may be combined and laminated.
  • a tapered portion 341e1 may be formed in the concave portion 341e of the first laminated steel plate 341. As shown in FIG. 32, when viewed from the axial direction, tapered portions 341e1 are formed at portions on both sides in the circumferential direction of the inner surface constituting the concave portion 341e. That is, the circumferential dimension of the recess 341e gradually decreases from the radially outer side toward the radially inner side.
  • the present invention can be used in, for example, a rotor core, a rotor, and a motor.
  • connection laminated steel plate 43a ... connection base portion, 43b ... through portion, 43c ... connection annular portion, 43d ... hole, 43e ... projection, 43f ... large diameter portion, 43g ... small diameter part, 43k ... connection part, 43m ... connection part, 43w ... outer edge part, 44 ... connection laminated steel sheet, 44a ... connection base part, 44b ... penetration part, 44c: Connecting piece-like portion, 44d: Hole portion, 44e ... Recessed portion, 44k ...
  • second laminated steel sheet 345 ..Connected laminated steel sheets, 341p: first caulking part, 342p: second caulking part, 345p: connecting caulking Part, 341p1 ... first convex part of the first caulking part, 342p1 ... second convex part of the second caulking part, 345p1 ... connecting convex part of the connecting caulking part 341, 341p2 ... first caulking First concave portion, 342p2 ... second concave portion of second caulking portion, 345p2 ... connecting concave portion of connecting caulking portion 341, 341b ... penetrating portion of first laminated steel plate, 342b ...

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
PCT/JP2019/012930 2018-03-29 2019-03-26 ロータコア、ロータ、及びモータ WO2019189217A1 (ja)

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WO2021124501A1 (ja) * 2019-12-19 2021-06-24 三菱電機株式会社 ステータ、電動機、圧縮機および空気調和装置

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JP2015186304A (ja) * 2014-03-20 2015-10-22 株式会社ジェイテクト 磁石埋込型ロータ
JP2015192594A (ja) * 2014-03-31 2015-11-02 ダイキン工業株式会社 ロータおよびその製造方法

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JP5887808B2 (ja) * 2011-10-04 2016-03-16 日本精工株式会社 電動パワーステアリング用電動機及び電動パワーステアリング装置
JP5858232B2 (ja) * 2012-02-17 2016-02-10 日本電産株式会社 ロータコア、モータ、およびモータの製造方法
JP6281147B2 (ja) * 2012-08-07 2018-02-21 日本電産株式会社 ロータおよびモータ
JP6536273B2 (ja) * 2015-08-10 2019-07-03 日本電産株式会社 ロータ、およびモータ

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US20110127859A1 (en) * 2008-07-14 2011-06-02 Hanning Electro-Werke GmbH & Co. KG Permanent-magnetic rotor
JP2015186304A (ja) * 2014-03-20 2015-10-22 株式会社ジェイテクト 磁石埋込型ロータ
JP2015192594A (ja) * 2014-03-31 2015-11-02 ダイキン工業株式会社 ロータおよびその製造方法

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Publication number Priority date Publication date Assignee Title
WO2021124501A1 (ja) * 2019-12-19 2021-06-24 三菱電機株式会社 ステータ、電動機、圧縮機および空気調和装置
JPWO2021124501A1 (zh) * 2019-12-19 2021-06-24
JP7285961B2 (ja) 2019-12-19 2023-06-02 三菱電機株式会社 ステータ、電動機、圧縮機および空気調和装置

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