WO2023067721A1 - 回転子、回転電機、および電動パワーステアリング装置 - Google Patents

回転子、回転電機、および電動パワーステアリング装置 Download PDF

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Publication number
WO2023067721A1
WO2023067721A1 PCT/JP2021/038744 JP2021038744W WO2023067721A1 WO 2023067721 A1 WO2023067721 A1 WO 2023067721A1 JP 2021038744 W JP2021038744 W JP 2021038744W WO 2023067721 A1 WO2023067721 A1 WO 2023067721A1
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WO
WIPO (PCT)
Prior art keywords
magnets
rotor
magnet
rotor core
axial direction
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2021/038744
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
孝 山本
正文 岡崎
悟 阿久津
昇平 藤倉
研太 元吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to US18/697,514 priority Critical patent/US20240429760A1/en
Priority to PCT/JP2021/038744 priority patent/WO2023067721A1/ja
Priority to EP21961374.2A priority patent/EP4422035A4/en
Priority to JP2023554147A priority patent/JPWO2023067721A1/ja
Priority to CN202180102047.7A priority patent/CN118044100A/zh
Publication of WO2023067721A1 publication Critical patent/WO2023067721A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the present disclosure relates to rotors, rotating electric machines, and electric power steering devices.
  • a rotating electrical machine described in Patent Document 1 includes a rotor and a stator.
  • the rotor has a first rotor core, a second rotor core, and a plurality of magnets arranged side by side on the outer peripheral surface of each rotor core.
  • the magnet of the first rotor core hereinafter referred to as first magnet
  • the magnet of the second rotor core hereinafter referred to as second magnet
  • the first magnet and the second magnet come into contact with each other, the magnets with different polarities will come into contact with each other.
  • the first magnet and the second magnet are arranged so as not to contact each other.
  • the inventors of the present application have found that the performance of the rotating electric machine is degraded even if the distance between the first magnet and the second magnet is too large.
  • an object of the present disclosure is to optimize the distance between the first magnet and the second magnet to avoid performance degradation of the rotating electric machine.
  • One aspect of the rotor according to the present disclosure includes a shaft, a first rotor core and a second rotor core fixed to the shaft and arranged side by side in an axial direction along the center axis of the shaft, and the first rotor core.
  • a plurality of first magnets arranged side by side in the circumferential direction around the central axis on the outer peripheral surface, and a plurality of second magnets arranged side by side in the peripheral direction on the outer peripheral surface of the second rotor core, The plurality of first magnets and the plurality of second magnets are displaced in the circumferential direction, and the distance in the axial direction between the plurality of first magnets and the plurality of second magnets is 0. .5 to 3.0 mm.
  • One aspect of the rotating electric machine according to the present disclosure includes the rotor and a stator surrounding the rotor.
  • One aspect of the electric power steering device according to the present disclosure includes the rotating electric machine.
  • FIG. 1 is a perspective view of a rotor according to Embodiment 1;
  • FIG. FIG. 2 is an enlarged view of FIG. 1;
  • 1 is a cross-sectional view of a rotating electric machine according to Embodiment 1;
  • FIG. 7 is a graph showing the relationship between the distance between magnets and the torque ripple rate during normal use output. 7 is a graph showing the relationship between the distance between magnets and the torque ripple rate at maximum output.
  • FIG. 4 is a cross-sectional view of a rotating electric machine according to a modification of Embodiment 1;
  • FIG. 7 is a cross-sectional view of a rotating electric machine according to Embodiment 2;
  • FIG. 11 is a cross-sectional view of a rotating electric machine according to a modification of Embodiment 2;
  • FIG. 11 is a cross-sectional view of a rotating electrical machine according to Embodiment 3;
  • FIG. 11 is a cross-sectional view of a rotating electric machine according to a
  • FIG. 1 is a perspective view showing rotor 10 in Embodiment 1.
  • FIG. 2 is an enlarged view of FIG.
  • FIG. 3 is a cross-sectional view of rotating electrical machine M including rotor 10 shown in FIG.
  • the rotary electric machine M is used, for example, as a motor for an electric power steering device for a vehicle.
  • the rotating electric machine M has a rotor 10 and a stator 4.
  • the rotor 10 has a shaft 1, a first rotor core 3a, a second rotor core 3b, a plurality of first magnets 2a, and a plurality of second magnets 2b.
  • the stator 4 is arranged to surround the first magnet 2a and the second magnet 2b.
  • the shaft 1 is connected to a steering system of the vehicle, which is provided in the electric power steering device.
  • the direction along the central axis O of the shaft 1 is called the axial direction.
  • a direction that intersects the central axis O when viewed from the axial direction is called a radial direction.
  • the direction of rotation around the central axis O when viewed from the axial direction is called the circumferential direction.
  • the first rotor core 3a and the second rotor core 3b are fixed to the shaft 1.
  • the first rotor core 3a and the second rotor core 3b are arranged side by side in the axial direction while being in contact with each other.
  • the first rotor core 3a and the second rotor core 3b are formed, for example, by laminating a plurality of core pieces.
  • the core piece is formed by pressing a low-carbon steel plate, for example.
  • the materials and forming methods of the first rotor core 3a and the second rotor core 3b are not limited to those described above, and can be changed as appropriate.
  • the plurality of first magnets 2a are arranged side by side at equal intervals in the circumferential direction on the outer peripheral surface of the first rotor core 3a.
  • the plurality of second magnets 2b are arranged side by side at equal intervals in the circumferential direction on the outer peripheral surface of the second rotor core 3b.
  • the polarities of the respective first magnets 2a alternate in the circumferential direction.
  • the polarity of each second magnet 2b alternates in the circumferential direction.
  • Neodymium magnets for example, can be used as the magnets 2a and 2b. Note that the materials of the magnets 2a and 2b can be changed as appropriate.
  • a so-called step skew structure is adopted for the rotor 10 according to the present embodiment. Specifically, the positions of the plurality of first magnets 2a and the plurality of second magnets 2b in the circumferential direction are shifted from each other. For this reason, focusing on an arbitrary first magnet 2a, that first magnet 2a is adjacent to two second magnets 2b in the axial direction. The polarities of the two second magnets 2b are different from each other. Therefore, one of the two second magnets 2b has a different polarity than the axially adjacent first magnet 2a.
  • the stator 4 is provided with a plurality of slots protruding radially inward. Each slot is arranged side by side in the circumferential direction.
  • the rotary electric machine M according to the present embodiment is a so-called 8-pole 12-slot motor. That is, the number of the first magnets 2a and the number of the second magnets 2b is eight, and the number of slots of the stator 4 is twelve. However, the number of first magnets 2a, second magnets 2b, and slots can be changed as appropriate.
  • the rotor 10 may have three or more rotor cores.
  • the length of the first rotor core 3a is preferably longer than the length of the first magnet 2a.
  • the length of the second rotor core 3b is preferably longer than the length of the second magnets 2b.
  • the magnetic flux emitted from the magnets 2a and 2b passes through the stator 4, then through the rotor cores 3a and 3b, and returns to the magnets 2a and 2b.
  • rotor cores 3a and 3b are shorter than magnets 2a and 2b in the axial direction, parts of magnets 2a and 2b protrude from the outer peripheral surfaces of rotor cores 3a and 3b.
  • the surfaces of the magnets 2a and 2b facing radially inward (hereinafter referred to as inner peripheral surfaces) partly face the air. It is difficult for the magnetic flux to return to the portions of the inner peripheral surfaces of the magnets 2a and 2b that face the air. As a result, it leads to deterioration of torque ripple.
  • the magnets with different polarities come into contact with each other. It will be done.
  • magnetic flux leakage is a phenomenon in which the magnetic flux emitted from the magnet does not contribute to torque generation of the rotary electric machine M because it does not pass through a normal path (path passing through the stator, rotor core, etc.).
  • the plurality of first magnets 2a and the plurality of second magnets 2b are separated in the axial direction. As shown in FIG. 3, in this specification, the distance between the first magnet 2a and the second magnet 2b in the axial direction is referred to as "inter-magnet distance D".
  • FIG. 4 is a graph showing the relationship between the torque ripple and the distance D between the magnets at normal use output for the rotary electric machine M used in the electric power steering device.
  • FIG. 5 is a graph showing the relationship between the torque ripple at the maximum output and the distance D between the magnets for the rotating electrical machine M similar to that in FIG. 4.
  • the horizontal axis in FIGS. in mm.
  • the vertical axis in FIGS. 4 and 5 is the torque ripple rate.
  • the torque ripple rate is a numerical value expressed as a percentage (%) representing the ratio of the torque fluctuation range to the average torque value.
  • the torque ripple rate at the normal use output can be made equal to or less than the target value.
  • the torque ripple rate increases as the distance D between the magnets increases.
  • the torque ripple rate at the maximum output can be made equal to or less than the target value.
  • the distance D between the magnets is 0.5 mm or more and 3.0 mm or less.
  • the first rotor core 3a is provided with the first protrusion 6a
  • the second rotor core 3b is provided with the second protrusion 6b in order to set the distance D between the magnets within the above numerical range (Fig. 2, see Figure 3).
  • the first protrusion 6a protrudes radially outward from the outer peripheral surface of the first rotor core 3a.
  • the first protrusion 6a is arranged at a position adjacent to the second rotor core 3b in the axial direction.
  • the first protrusions 6a are arranged between adjacent first magnets 2a in the circumferential direction.
  • the second protrusion 6b protrudes radially outward from the outer peripheral surface of the second rotor core 3b.
  • the second protrusion 6b is arranged at a position adjacent to the first rotor core 3a in the axial direction.
  • the second protrusions 6b are arranged between the adjacent second magnets 2b in the circumferential direction.
  • the position of the first magnets 2a in the axial direction can be adjusted to a predetermined position by using the position of the first protrusions 6a as a reference. easier to match.
  • the second magnet 2b when attaching the second magnet 2b to the second rotor core 3b, by using the position of the second protrusion 6b as a reference, it becomes easier to adjust the position of the second magnet 2b in the axial direction to a predetermined position.
  • the "predetermined position" is a position of the first magnet 2a and the second magnet 2b such that the distance D between the magnets is 0.5 mm or more and 3.0 mm or less.
  • the distance D between the magnets can be easily adjusted within the range of 0.5 mm to 3.0 mm.
  • the core pieces that will become the first rotor core 3a and the second rotor core 3b can be pre-formed with portions that will become the first projections 6a and the second projections 6b. Thereby, the distance D between the magnets can be adjusted without adding the number of parts.
  • the protrusions 6a and 6b are used as references for the axial positions when the magnets 2a and 2b are attached to the rotor cores 3a and 3b.
  • the protrusions 6a and 6b do not necessarily need to be arranged near the contact surfaces of the rotor cores 3a and 3b.
  • the first protrusion 6a may be arranged in the central portion of the first rotor core 3a in the axial direction.
  • the position of the first magnet 2a in the axial direction can be adjusted by adjusting the position of the mark or the like with reference to the first projecting portion 6a.
  • the second protrusion 6b may be arranged in the central portion of the second rotor core 3b in the axial direction.
  • the first protrusions 6a may be formed on the first rotor core 3a, and the second protrusions 6b may not be formed on the second rotor core 3b.
  • at least the first protrusion 6a can be used as a reference for the axial position when attaching the first magnet 2a to the first rotor core 3a, and the distance D between the magnets can be easily set within a predetermined range.
  • the second rotor core 3b may be formed with the second protrusions 6b and the first rotor core 3a may not be formed with the first protrusions 6a.
  • Embodiment 2 Next, a rotating electrical machine according to Embodiment 2 will be described. Since the rotary electric machine according to the present embodiment has the same basic configuration as the rotary electric machine according to the first embodiment, different points will be mainly described.
  • the first protrusion 6a is formed over the entire circumference of the outer peripheral surface of the first rotor core 3a.
  • a second protrusion 6b is formed along the entire circumference of the outer peripheral surface of the second rotor core 3b.
  • the first protrusion 6a and the second protrusion 6b are annular when viewed from the axial direction. Also, the first protrusion 6a and the second protrusion 6b are in contact with each other.
  • the first magnets 2a and the second magnet 2b can be used as spacers.
  • the first magnets 2a may be brought into contact with the first protrusions 6a
  • the second magnets 2b may be brought into contact with the first protrusions 6a.
  • the sum of the thicknesses of the first projecting portion 6a and the second projecting portion 6b in the axial direction is the distance D between the magnets. Therefore, it becomes easier to set the inter-magnet distance D within a predetermined numerical range. More specifically, the sum of the thicknesses of the first protrusion 6a and the second protrusion 6b in the axial direction may be within the range of 0.5 to 3.0 mm.
  • the core pieces that will become the first rotor core 3a and the second rotor core 3b can be pre-formed with portions that will become the first projections 6a and the second projections 6b. This makes it possible to easily control the distance D between the magnets without increasing the number of parts.
  • the core pieces are stacked in the axial direction, there are two types: a first core piece formed with projections to be the projections 6a and 6b, and a second core piece not formed with the projections. You may prepare. In this case, by changing the number of laminated first core pieces, the sum of the thicknesses of the protrusions 6a and 6b in the axial direction (that is, the distance D between the magnets) can be easily changed.
  • An annular projection may be formed only on one of the first rotor core 3a and the second rotor core 3b.
  • the annular first protrusion 6a is formed on the first rotor core 3a, and the annular protrusion is not formed on the second rotor core 3b.
  • contact between the first magnet 2a and the second magnet 2b can be avoided due to the presence of the first protrusion 6a.
  • both the first magnet 2a and the second magnet 2b may be in contact with the first protrusion 6a.
  • the thickness of the first protrusion 6a in the axial direction is the distance D between the magnets.
  • the thickness of the first protrusion 6a in the axial direction may be within the range of 0.5 to 3.0 mm.
  • the annular second protrusion 6b may be formed only on the second rotor core 3b, and the thickness of the second protrusion 6b may be within the range of 0.5 to 3.0 mm.
  • the protrusions 6a and 6b may not be annular when viewed from the axial direction.
  • a plurality of first protrusions 6a may be intermittently arranged in the circumferential direction, and each first protrusion 6a may be positioned between the first magnet 2a and the second magnet 2b in the axial direction.
  • each first protrusion 6a functions as a spacer that secures the space between the first magnet 2a and the second magnet 2b.
  • a plurality of second protrusions 6b are intermittently arranged in the circumferential direction, and each second protrusion 6b is positioned between the first magnet 2a and the second magnet 2b in the axial direction. good.
  • Embodiment 3 Next, a rotating electrical machine according to Embodiment 3 will be described. Since the rotary electric machine according to the present embodiment has the same basic configuration as the rotary electric machine according to the first embodiment, different points will be mainly described.
  • protrusions 6a and 6b are not formed on rotor cores 3a and 3b, and gap 5 is formed between first magnet 2a and second magnet 2b.
  • the dimension of the gap 5 in the axial direction is the distance D between the magnets. Therefore, by setting the dimension of the gap 5 in the axial direction within the range of 0.5 to 3.0 mm, the effect described in the first embodiment can be obtained.
  • the first extension 7a may be provided on the first magnet 2a.
  • the first extending portion 7a is a portion of the first magnet 2a that extends axially outward from the first end surface 4a of the stator 4 .
  • the second extension 7b may be provided on the second magnet 2b.
  • the second extending portion 7b is a portion of the second magnet 2b that extends axially outward from the second end face 4b of the stator 4.
  • the first rotor core 3a extends axially outward from the first end face 4a of the stator 4 to support the first extension 7a.
  • the second rotor core 3b extends axially outward from the second end face 4b of the stator 4 to support the second extension 7b.
  • the magnetic flux of the magnets 2a and 2b which is reduced by providing the gap 5, is compensated for by the first extending portion 7a and the second extending portion 7b, thereby reducing the output torque of the rotating electric machine M. can be suppressed.
  • the length of the extensions 7a and 7b in the axial direction is excessive, the ratio of the magnetic flux entering the stator 4 from the extensions 7a and 7b is reduced, and the utilization efficiency of the magnetic flux of the magnets 2a and 2b is reduced. descend. Therefore, it is desirable that the axial length of the first extending portion 7a extending from the first end face 4a is within the range of 0.5 to 3.0 mm.
  • the axial length of the second extending portion 7b extending from the second end face 4b is preferably within the range of 0.5 to 3.0 mm.
  • first magnet 2a and the second magnet 2b may be provided with the extending portion.
  • first magnet 2a may be provided with the first extension 7a and the second magnet 2b may not be provided with the second extension 7b.
  • second magnet 2b may be provided with the second extension 7b and the first magnet 2a may not be provided with the extension.
  • first extension portion 7a and the second extension portion 7b shown in FIG. 10 may be provided in the rotor 10 shown in FIGS.
  • the rotor 10 includes the shaft 1, the first rotor core 3a and the second rotor core 3b fixed to the shaft 1 and arranged side by side in the axial direction along the central axis O of the shaft 1. , a plurality of first magnets 2a arranged side by side in the circumferential direction around the central axis O on the outer peripheral surface of the first rotor core 3a, and a plurality of second magnets 2a arranged side by side in the peripheral direction on the outer peripheral surface of the second rotor core 3b.
  • the plurality of first magnets 2a and the plurality of second magnets 2b are displaced in the circumferential direction, and the axial direction between the plurality of first magnets 2a and the plurality of second magnets 2b. is in the range of 0.5 to 3.0 mm.
  • the torque ripple in the normal use output of the rotating electric machine M can be suppressed by setting the distance D between the magnets to 0.5 mm or more. Further, since the distance D between the magnets is 3.0 mm or less, torque ripple at the maximum output of the rotary electric machine M can be suppressed. In this way, it is possible to provide the rotor 10 capable of reducing torque ripple at both the normal use output and the maximum output.
  • At least one of the first rotor core 3a and the second rotor core 3b is formed with a projection (the first projection 6a or the second projection 6b). It may be positioned between second magnets 2b adjacent to each other in the circumferential direction.
  • the protrusion can be used as a reference when attaching the first magnet 2a to the first rotor core 3a or when attaching the second magnet 2b to the second rotor core 3b.
  • At least one of the first rotor core 3a and the second rotor core 3b is formed with a projection (the first projection 6a or the second projection 6b). 2 magnet 2b.
  • the protrusion functions as a spacer, and contact between the first magnet 2a and the second magnet 2b can be avoided.
  • the protrusion may be annular when viewed from the axial direction. In this case, the protrusions can be easily arranged between all the first magnets 2a and all the second magnets 2b.
  • the protrusion may be in contact with both the first magnet 2a and the second magnet 2b that are adjacent in the axial direction.
  • the distance D between the magnets is the dimension of the protrusion in the axial direction. Therefore, the inter-magnet distance D can be more easily adjusted within the range of 0.5 to 3.0 mm.
  • gaps 5 may be provided between the plurality of first magnets 2a and the plurality of second magnets 2b.
  • the rotating electric machine M also includes a rotor 10 and a stator 4 surrounding the rotor 10 .
  • At least one of the plurality of first magnets 2a and the plurality of second magnets 2b has an extension portion (first extension portion 7a or second extension portion 7b) extending from the end surface of the stator 4 in the axial direction. ) may be formed.
  • first extension portion 7a or second extension portion 7b extending from the end surface of the stator 4 in the axial direction.
  • the magnetic flux of the first magnet 2a or the second magnet 2b which decreases due to the provision of the inter-magnet distance D, can be compensated for by the extending portion. Therefore, it is possible to prevent the output torque of the rotary electric machine M from decreasing.
  • the axial dimension of the extending portion may be within the range of 0.5 to 3.0 mm. In this case, it is possible to suppress a decrease in the effective utilization rate of the magnetic flux of the magnet due to an excessively large extension.
  • the electric power steering device includes the rotating electric machine M described above. According to such an electric power steering apparatus, comfortable operability can be realized both at normal use output and at maximum output.
  • the rotary electric machine M according to the present disclosure may be used for applications other than the electric power steering device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
PCT/JP2021/038744 2021-10-20 2021-10-20 回転子、回転電機、および電動パワーステアリング装置 Ceased WO2023067721A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US18/697,514 US20240429760A1 (en) 2021-10-20 2021-10-20 Rotor, rotating electric machine, and electric power steering device
PCT/JP2021/038744 WO2023067721A1 (ja) 2021-10-20 2021-10-20 回転子、回転電機、および電動パワーステアリング装置
EP21961374.2A EP4422035A4 (en) 2021-10-20 2021-10-20 ROTOR, ROTATING ELECTRIC MACHINE AND ELECTRIC POWER STEERING DEVICE
JP2023554147A JPWO2023067721A1 (https=) 2021-10-20 2021-10-20
CN202180102047.7A CN118044100A (zh) 2021-10-20 2021-10-20 转子、旋转电机及电动助力转向装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/038744 WO2023067721A1 (ja) 2021-10-20 2021-10-20 回転子、回転電機、および電動パワーステアリング装置

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WO2023067721A1 true WO2023067721A1 (ja) 2023-04-27

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PCT/JP2021/038744 Ceased WO2023067721A1 (ja) 2021-10-20 2021-10-20 回転子、回転電機、および電動パワーステアリング装置

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US (1) US20240429760A1 (https=)
EP (1) EP4422035A4 (https=)
JP (1) JPWO2023067721A1 (https=)
CN (1) CN118044100A (https=)
WO (1) WO2023067721A1 (https=)

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US20240429760A1 (en) 2024-12-26

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