WO2023089721A1 - 永久磁石式回転電機 - Google Patents

永久磁石式回転電機 Download PDF

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Publication number
WO2023089721A1
WO2023089721A1 PCT/JP2021/042377 JP2021042377W WO2023089721A1 WO 2023089721 A1 WO2023089721 A1 WO 2023089721A1 JP 2021042377 W JP2021042377 W JP 2021042377W WO 2023089721 A1 WO2023089721 A1 WO 2023089721A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
rotor
magnets
teeth
electric machine
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/JP2021/042377
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
晴之 米谷
亮治 宮武
篤史 山本
昇 新口
勝弘 平田
寛典 鈴木
拓哉 伊東
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
University of Osaka NUC
Original Assignee
Mitsubishi Electric Corp
Osaka University NUC
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, Osaka University NUC filed Critical Mitsubishi Electric Corp
Priority to CN202180104106.4A priority Critical patent/CN118216076A/zh
Priority to PCT/JP2021/042377 priority patent/WO2023089721A1/ja
Priority to JP2022520035A priority patent/JP7090828B1/ja
Priority to EP21964736.9A priority patent/EP4436016A4/en
Priority to US18/704,922 priority patent/US12620846B2/en
Publication of WO2023089721A1 publication Critical patent/WO2023089721A1/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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • 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
    • 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
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices
    • H02K3/493—Slot-closing devices magnetic
    • 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
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/102—Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • This application relates to a permanent magnet rotating electric machine.
  • Patent Literature 1 discloses a rotating electric machine that is such a magnetic wave gear device.
  • a magnetic wave gear device disclosed in Patent Document 1 includes a stator, a first rotor that rotates at a low speed, and a second rotor that rotates at a high speed according to a gear ratio.
  • the stator, the first rotor, and the second rotor are arranged in order from the outer peripheral side around the rotating shaft.
  • the stator includes stator coils.
  • the stator coil is a coil for outputting generated power or a coil for controlling generated torque.
  • the speed of the second rotor can be changed in a state where the first rotor and the second rotor are not in contact with the stator. This eliminates the need for a conventional transmission, and reduces the maintenance load to deal with mechanical wear and the like.
  • a rotating electric machine disclosed in Patent Document 1 has a plurality of stator slots in a stator, and each stator slot houses a stator coil and a stator magnet (permanent magnet).
  • the stator magnets are magnetized in the same direction in each stator slot.
  • a first rotor having a plurality of magnetic pole pieces arranged in a circumferential direction is arranged on the inner peripheral side of the stator, and a second rotor having permanent magnets is arranged on the inner peripheral side of the first rotor.
  • the stator coil is wound around the stator by distributed winding.
  • a stator coil wound by distributed winding has a large capacity, and as the diameter of the stator increases, workability of the stator coil decreases. Therefore, when the capacity of the rotary electric machine is increased, the workability of the stator coil is deteriorated.
  • a stator coil wound by concentrated winding deterioration in workability of the stator coil is suppressed even if the capacity is increased. For this reason, in order to suppress deterioration in workability of the stator coil, it is preferable that the stator coil of the rotating electric machine is wound by concentrated winding.
  • the input is generated by rotating the first rotor with external power.
  • the number of revolutions of the first rotor is multiplied by the torque acting on the first rotor.
  • Magnetic force by the stator magnets and magnetic force by the permanent magnets of the second rotor are modulated by the magnetic pole pieces of the first rotor to generate torque in the first rotor, so that the required output can be obtained. Therefore, it is necessary to set the torque generated in the first rotor to a predetermined value determined by the number of revolutions. That is, by increasing the torque generated in the first rotor, it is possible to increase the capacity.
  • the size of the device or the amount of permanent magnets used depends on the magnetic flux linkage generated from the second rotor in the above-mentioned stator coil and the rotation speed of the second rotor. It has become clear that it is greatly affected by the magnitude of the torque generated in the first rotor rather than by the proportional induced electromotive force (hereinafter referred to as induced voltage). That is, if the torque is reduced even if the induced voltage is increased, the size of the device or the amount of permanent magnets used will increase.
  • the magnetic geared motor disclosed in Patent Document 2 has the same configuration as that of Patent Document 1, but the stator magnets housed in the stator slots are divided into left and right sides in the circumferential direction, and the magnetization directions are reversed. there is By doing so, the number of pole pairs N S created by the stator magnets can be made larger than when each slot is magnetized in the same direction.
  • the increase/decrease ratio increases, and when used as a generator, the induced voltage increases.
  • the magnetic force generated from one stator magnet is reduced, resulting in a reduction in torque. be.
  • the present application has been made in order to solve the above-described problems.
  • the purpose is to improve the generated torque.
  • a permanent magnet type rotary electric machine disclosed in the present application includes a stator core having a plurality of stator teeth in the circumferential direction, and a plurality of stator slots formed between the stator teeth. a stator coil concentratedly wound around the stator teeth; and stator magnets having the same polarity in the radial direction, the stator magnets being arranged on the respective opening sides of the plurality of stator slots. a first rotor having a plurality of pole pieces and provided opposite to and coaxial with the stator magnets; a plurality of permanent magnets; the first rotor having a plurality of permanent magnets; and a second rotor provided coaxially with the first rotor so as to face the first rotor.
  • the circumferential width of the stator teeth sandwiched between the stator magnets is narrower than the circumferential width of the stator slots.
  • FIG. 1 is a cross-sectional view showing the overall basic configuration of a permanent magnet type rotating electrical machine disclosed in the present application
  • FIG. 4 is an enlarged conceptual diagram showing a cross section near the stator teeth of the permanent magnet type rotating electric machine according to Embodiment 1
  • FIG. 2 is a cross-sectional view schematically showing magnetic flux generated from a stator magnet of the permanent magnet type rotating electric machine according to Embodiment 1
  • FIG. 4 is a diagram showing analysis results of magnetic flux generated by a stator magnet of the permanent magnet type rotating electric machine according to Embodiment 1
  • FIG. . 4 is a diagram showing a result of analyzing the torque of the permanent magnet type rotary electric machine according to the first embodiment
  • FIG. 10 is an enlarged conceptual diagram showing a cross section near the stator teeth of the permanent magnet type rotary electric machine according to Embodiment 2;
  • FIG. 10 is a cross-sectional view schematically showing magnetic flux generated from a stator magnet of the permanent magnet type rotating electric machine according to Embodiment 2;
  • FIG. 9 is a diagram showing the result of analyzing the torque of the permanent magnet type rotating electric machine according to the second embodiment;
  • FIG. 10 is a diagram showing results of analysis of torque of a permanent magnet type rotating electrical machine with another configuration according to Embodiment 2;
  • FIG. 1 is a cross-sectional view showing the basic configuration of a permanent magnet type rotating electric machine disclosed in the present application. Using FIG. 1, first, the operation when this permanent magnet type rotating electrical machine is used as a generator will be described. In this application, a generator will be described as an example of a rotating electric machine, but the present invention can also be applied when used as an electric motor.
  • a stator core 2 of a stator 1 has a plurality of stator slots 3, in which stator coils 4 are housed.
  • the stator coil 4 is intensively wound around the stator teeth 5 .
  • Stator magnets 6, which are permanent magnets, are stored in the stator slots 3, and the stator magnets 6 are all magnetized to have the same polarity in the radial direction. Therefore, if the stator magnet 6 is the north pole, the stator teeth 5 are the south pole, forming the same number of pole pairs NS as the number of the stator slots 3 .
  • a first rotor 10 is provided across a gap from the stator 1, and the first rotor 10 has a configuration in which a plurality of magnetic pole pieces 11 are arranged in the circumferential direction. Let N L be the number of pole pieces.
  • a second rotor 20 exists with an air gap from the first rotor 10 .
  • the second rotor 20 has second rotor magnets (permanent magnets) 21 and forms N H pole pairs (the number of poles is 2N H ).
  • the second rotor 20 will It rotates at a rotational speed of NL / NH times. In this way, the second rotor 20 rotates at a rotational speed NL / NH times that of the first rotor 10, so the permanent magnet type rotating electric machine disclosed in the present application has a magnetic speed change mechanism. It is called a permanent magnet type rotary electric machine.
  • the magnetic flux generated from the second rotor magnet 21 interlinks with the stator coil 4, causing the stator coil 4 can generate an induced electromotive force, and if this is connected to a load, the generated power can be output from the stator coil 4 .
  • the device dimensions of the rotating electric machine or the amount of permanent magnets to be used depends on the magnitude of the torque rather than the induced voltage. It turned out to be highly dependent. That is, by increasing the torque, it is possible to reduce the device size of the rotating electrical machine of the present application and reduce the amount of permanent magnets used.
  • FIG. 2 is an enlarged conceptual diagram showing a cross section near the stator teeth of the permanent magnet type rotating electric machine according to the first embodiment.
  • FIG. 2 shows a portion including two stator slots 3 .
  • a stator coil 4 is housed in the stator slot 3 and concentratedly wound around the stator teeth 5 .
  • Stator magnets 6 are housed in the stator slots 3, and the stator magnets 6 are magnetized so that all the slots have the same polarity in the radial direction.
  • the stator magnets 6 are arranged in the stator slots 3 on the side of the first air gap 30 from the stator coils 4 .
  • stator teeth 5 The portion of the stator teeth 5 corresponding to the portion where the stator magnet 6 is arranged, that is, the position sandwiched between the stator magnets 6 arranged in the adjacent stator slots 3 as shown in FIG.
  • the result of considering the stator teeth 50 at positions sandwiched between the adjacent stator magnets 6 will be described below.
  • the circumferential width of the stator teeth 50 sandwiched between the adjacent stator magnets 6 is b, and the portion facing the first gap 30, that is, the gap surface of the stator teeth 5 is Let a be the pitch and c be the width of the stator slot 3 in the circumferential direction.
  • the circumferential width of the stator teeth 50 at positions sandwiched between the adjacent stator magnets 6 is the same throughout the portion sandwiched between the adjacent stator magnets 6. .
  • b/a ⁇ 100 [%] is 50% or less, that is, the adjacent stator magnets 6
  • the circumferential width of the stator teeth 50 at the sandwiched position is set to be narrower than the circumferential width c of the stator slot.
  • FIG. 3 is a diagram schematically showing the magnetic flux generated from the stator magnet 6 magnetized in the direction of the straight arrow.
  • the magnetic flux generated from the stator magnet 6 reaches the pole piece 11 of the first rotor 10 through the first air gap 30, it becomes an effective magnetic flux that contributes to the torque.
  • the magnetic flux generated from the stator magnet 6 actually reaches the stator teeth 5 through adjacent portions in the circumferential direction, as indicated by thin curved arrows in the drawing, and becomes leakage magnetic flux that does not contribute to torque.
  • the magnetic flux generated from the stator magnet 6 leaks to the stator teeth 5 before reaching the magnetic pole piece 11 of the first rotor 10 as indicated by the thick curved arrow.
  • the first rotor 10 is a structure having a plurality of magnetic pole pieces 11, compared with a general permanent magnet type rotating electric machine, As a result, the permeance coefficient of the stator magnet 6 tends to decrease. That is, there is a problem that a considerable amount of magnetic flux generated from the stator magnet 6 leaks to the stator teeth 5 along the route shown in FIG. This reduces the torque. In order to reduce this leakage magnetic flux, it is desirable to widen the distance between the stator teeth 50 sandwiched between the stator magnets 6 and the stator magnets 6 .
  • FIG. 4 shows the electromagnetic field analysis results of the magnetic flux density from the stator magnet 6 on the surface of the first gap 30 of the first rotor 10 with respect to the stator tooth width/stator tooth pitch on the gap surface.
  • FIG. 4 shows the result of analysis of the fundamental wave component of the magnetic flux of the stator magnet. The larger the magnetic flux of the fundamental wave component, the larger the effective magnetic flux contributing to the torque. As can be seen from FIG. 4, even with the same amount of magnets, the narrower the width of the stator teeth 5, the greater the effective magnetic flux that contributes to the torque.
  • FIG. 5 shows the electromagnetic field analysis results of the torque with respect to the stator tooth width/stator tooth pitch on the air gap surface of the stator teeth 5 .
  • FIG. 5 shows the results of an analysis in which the stator magnet 6 is the same and the stator tooth width is changed, assuming that the torque is 100% when the stator tooth width/stator tooth pitch is 50%. It can be seen from the figure that the torque is improved when the width of the stator teeth 50 located between the stator magnets 6 is narrow. That is, by narrowing the width of the stator teeth 50 between the adjacent stator magnets 6 relative to the width of the stator slots 3 in the circumferential direction, the torque can be improved with the same amount of permanent magnets used and the same device dimensions. It can contribute to miniaturization of equipment.
  • FIG. 6 is an enlarged conceptual diagram showing a cross section near the stator teeth of the permanent magnet type rotating electric machine according to the second embodiment.
  • a stator coil 4 is housed in the stator slot 3 and concentratedly wound around the stator teeth 5 .
  • Stator magnets 6 are housed in the stator slots 3, and the stator magnets 6 are magnetized so that all the slots have the same polarity in the radial direction.
  • the stator magnets 6 are arranged in slots closer to the first air gap 30 than the stator coils 4 are.
  • the width of the stator slot 3 gradually widens toward the gap side, and at least on the gap surface, the width of the stator teeth is the same as the slot opening. is narrower than the width of However, the circumferential width of the stator teeth 50 sandwiched between the adjacent stator magnets 6 on the outermost side, that is, on the side near the bottom of the stator slot 3 is the width of the stator slot 3 at the same radial position. Narrower than wide is preferred.
  • Embodiment 1 From the description of Embodiment 1, it was shown that the torque is improved by making the stator tooth width narrower than the stator slot width. As shown in FIG. 7, the magnetic flux generated from the stator magnet passes through the stator teeth 50 sandwiched between the adjacent stator magnets 6 and is superimposed on the magnetic flux (main magnetic flux) from the second rotor magnet 21. do. Therefore, the stator teeth 50 located between the adjacent stator magnets 6 are likely to be magnetically saturated. There is a problem that the induced voltage obtained by the magnetic flux interlinking with the stator coil 4 is reduced due to the magnetic saturation of the stator teeth 5 .
  • stator teeth 50 located between the adjacent stator magnets 6 and reducing leakage magnetic flux from the stator magnets 6
  • the cross-sectional area of the stator teeth 5 can be increased on the anti-air gap side of the stator magnets 6 (the side close to the stator coil). Saturation can be alleviated. Therefore, it is possible to increase the torque by reducing the leakage magnetic flux while mitigating the decrease in the induced voltage.
  • FIG. 8 shows the electromagnetic field analysis results for a shape in which the width of the stator teeth 50 gradually decreases toward the inner circumference.
  • the width of the stator teeth at the position closest to the stator coil 4 is fixed to 44.5% of the stator tooth pitch, and the stator The magnet 6 is the same, and shows the torque when the stator tooth width on the air gap surface is changed.
  • FIG. 8 shows the torque as 100% when the width of the stator teeth 50 sandwiched between adjacent stator magnets is 44.5% of the stator tooth pitch in the entire radial direction. From the figure, it can be seen that the torque is improved while the influence of magnetic saturation of the stator teeth is reduced as much as possible. That is, in the stator teeth 50 sandwiched between the adjacent stator magnets, the torque is improved by gradually widening the stator slot width toward the air gap surface, thereby reducing the amount of permanent magnets used and the size of the device. is possible.
  • the circumferential width of the stator teeth 50 at the position sandwiched between the stator magnets at the position closest to the stator coil 4 (the outermost side) is narrower than the circumferential width of the stator slot at the same radial position. That is, although it is preferably less than 50% of the stator tooth pitch, it is not limited to this.
  • the width of the stator teeth 50 at the position closest to the stator coil 4 among the stator teeth 50 sandwiched between adjacent stator magnets is FIG. 9 shows the result of electromagnetic field analysis of torque when the stator tooth pitch is fixed at 57.7%, the stator magnet 6 is the same, and the stator tooth width on the air gap surface is changed.
  • FIG. 9 shows the torque as 100% when the width of the stator teeth 50 sandwiched between adjacent stator magnets is 57.7% of the stator tooth pitch in the entire radial direction. From the figure, even if the circumferential width of the stator teeth at the position closest to the stator coil 4 among the positions sandwiched between adjacent stator magnets is 50% or more of the stator tooth pitch (that is, fixed (Even if the circumferential width of the stator teeth 50 located between the child magnets closest to the stator coil 4 is wider than the circumferential width of the stator slot at the same radial position). It can be seen that the effect of
  • Embodiment 3 As shown in FIGS. 2 and 6, the width of the stator magnet 6 is configured so as to move away from the stator teeth toward the air gap side. , the distance between the stator magnet 6 and the stator teeth 50 sandwiched between the adjacent stator magnets can be further increased, thereby improving the torque.
  • stator 1 stator, 2 stator core, 3 stator slots, 4 stator coils, 5 stator teeth, 6 stator magnets, 10 first rotor, 11 pole pieces, 20 second rotor, 21 second rotor magnets (permanent magnets), 50 stator teeth located between adjacent stator magnets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
PCT/JP2021/042377 2021-11-18 2021-11-18 永久磁石式回転電機 Ceased WO2023089721A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202180104106.4A CN118216076A (zh) 2021-11-18 2021-11-18 永磁式旋转电机
PCT/JP2021/042377 WO2023089721A1 (ja) 2021-11-18 2021-11-18 永久磁石式回転電機
JP2022520035A JP7090828B1 (ja) 2021-11-18 2021-11-18 永久磁石式回転電機
EP21964736.9A EP4436016A4 (en) 2021-11-18 2021-11-18 ELECTRIC LATHE WITH PERMANENT MAGNET
US18/704,922 US12620846B2 (en) 2021-11-18 Permanent magnet-type rotary electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/042377 WO2023089721A1 (ja) 2021-11-18 2021-11-18 永久磁石式回転電機

Publications (1)

Publication Number Publication Date
WO2023089721A1 true WO2023089721A1 (ja) 2023-05-25

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EP (1) EP4436016A4 (https=)
JP (1) JP7090828B1 (https=)
CN (1) CN118216076A (https=)
WO (1) WO2023089721A1 (https=)

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JP7829446B2 (ja) * 2022-08-19 2026-03-13 三菱重工業株式会社 可変速動力装置及び制御方法

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JP7090828B1 (ja) 2022-06-24
US20240421643A1 (en) 2024-12-19
CN118216076A (zh) 2024-06-18

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