WO2019065112A1 - Rotor électrique rotatif et procédé de fabrication de rotor électrique rotatif - Google Patents

Rotor électrique rotatif et procédé de fabrication de rotor électrique rotatif Download PDF

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Publication number
WO2019065112A1
WO2019065112A1 PCT/JP2018/032665 JP2018032665W WO2019065112A1 WO 2019065112 A1 WO2019065112 A1 WO 2019065112A1 JP 2018032665 W JP2018032665 W JP 2018032665W WO 2019065112 A1 WO2019065112 A1 WO 2019065112A1
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WIPO (PCT)
Prior art keywords
rotor
portions
magnetic resistance
electric machine
bridge portion
Prior art date
Application number
PCT/JP2018/032665
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English (en)
Japanese (ja)
Inventor
和樹 浅田
悠史 菅井
剛 宮路
Original Assignee
アイシン・エィ・ダブリュ株式会社
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Publication date
Application filed by アイシン・エィ・ダブリュ株式会社 filed Critical アイシン・エィ・ダブリュ株式会社
Priority to JP2019544483A priority Critical patent/JPWO2019065112A1/ja
Publication of WO2019065112A1 publication Critical patent/WO2019065112A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • 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
    • 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 technology relates to a rotor used for a rotating electrical machine and a method of manufacturing the same.
  • an embedded structure magnet synchronous motor (hereinafter referred to as an "IPM motor") is used for a rotating electric machine mounted on an electric car, a hybrid car or the like.
  • the rotor of the IPM motor is configured by laminating ferromagnetic steel plates in which slots in which the magnets are embedded are respectively formed, and embedding the magnets in the slots.
  • a through hole is formed to adjust the flow of magnetic flux or to supply lubricating oil for weight reduction, but the through hole is particularly formed for weight reduction. If the size is increased, there is a risk of insufficient strength, so a bridge is provided inside the through hole or at the outer edge of the through hole. The bridge provided in this way becomes a passage for the magnetic flux, and the leakage magnetic flux becomes large, which hinders the torque reduction and the efficiency improvement of the IPM motor. Then, what makes a bridge nonmagnetic is proposed (refer to patent documents 1).
  • the bridge is irradiated with a laser to form a keyhole, a nonmagnetic wire is disposed there, and the laser is irradiated again to heat and melt.
  • a simple processing method may be considered in which a demagnetizing element such as nickel and chromium is supplied from the outside from the outside and melted by a laser to demagnetize it.
  • the leakage flux can be reduced only by demagnetizing part of the bridge by the width of the laser light.
  • the bridge which is longer than the width of the laser beam, there is a problem that it is difficult to efficiently reduce the leakage flux because the bridge is not sufficient.
  • the rotor of this rotating electrical machine is In a rotor of a rotating electrical machine in which a plurality of steel plates are stacked and a plurality of magnets are embedded in respective slots,
  • the steel plate has a plurality of holes, and a bridge portion sandwiched between two of the holes or between the radially outer end of the holes and the outer region of the steel plate;
  • the bridge portion has a plurality of magnetoresistive portions which are disposed at a plurality of places in the suspension direction at intervals, and which have lower magnetic permeability than other portions of the steel plate.
  • the magnetic resistance portions are arranged at a plurality of locations in the suspension direction at the bridge portion at intervals, leakage magnetic flux in the bridge portion can be efficiently reduced.
  • Sectional drawing which shows the IPM motor which concerns on this Embodiment.
  • the expanded sectional view which shows a part of rotor of the IPM motor which concerns on this Embodiment.
  • the expanded sectional view which shows a bridge part.
  • the figure which shows the relationship between the distance between magnetic resistance parts and magnetic resistance The figure which shows the relationship between the distance between magnetic resistance parts and the largest torque increase rate.
  • the expanded sectional view which shows a part of rotor of the IPM motor which concerns on another embodiment.
  • FIGS. 1 to 6 is a cross sectional view showing an IPM motor according to the present embodiment
  • FIG. 2 is an enlarged cross sectional view showing a part of a rotor of the IPM motor according to the present embodiment
  • FIG. 3 is an enlarged cross sectional view showing a bridge portion 4 shows the relationship between the distance between the magnetic resistance portions and the magnetic resistance
  • FIG. 5 shows the relationship between the distance between the magnetic resistance portions and the maximum torque increase rate
  • FIG. 6 shows the distance between the magnetic resistance portions and the increase in back electromotive force It is a figure which shows the relationship with a rate.
  • the IPM motor 1 which is an embedded structure magnet synchronous motor according to the present embodiment is roughly provided with a stator 10 and a rotor 20.
  • a stator core 11 is provided with an annular yoke, a plurality of slits 11a are formed on the inner peripheral side of the stator core 11, and stator windings 12 are respectively wound around the slits 11a.
  • the rotor 20 is formed of, for example, a plurality of laminated annular steel plates 21 made of magnetic material such as silicon steel and having a hollow center, fixed to a shaft member (not shown) disposed at the center to control rotation Be done.
  • each steel plate 21 has a slot 61 whose longitudinal direction is along the circumferential direction, slots 62 and 63 whose longitudinal direction is along the radial direction, and slots 62, A hole 40 disposed in the inner peripheral portion of the through hole 63 is penetrated, and the magnet 22 is embedded in the slot 61 and the pair of magnets 23 and 24 are embedded in the slot 62 and 63.
  • the length of the slot 61 is longer than the length of the magnet 22, and both ends thereof are bent so as to face the outer peripheral direction, and the space is a hole on the outer side of both sides of the portion in which the magnet 22 is embedded. 31, 32 are formed. Further, both end portions of the slot 61, that is, the outer peripheral sides of the space portions 31, 32 do not open toward the outer peripheral side, the outer end of the space portions 31, 32 in the radial direction (radial direction of the rotor 20) and the rotor 20 The space portions 31 and 32 are closed in such a manner that bridge portions Br1 and Br2 are bridged between the steel plate 21 and the outer region of the steel plate 21.
  • the strength of the outer edge portion of the annular steel plate 21 is secured by the bridge portions Br1 and Br2. Further, the magnetic flux of the magnet 22 is suppressed by the spaces 31 and 32 so as not to leak from the end of the magnet 22 as leakage magnetic flux, and the magnetic flux of the magnet 22 is gathered on the outer peripheral side of the annular steel plate 21, that is, It is configured to face the stator 10.
  • the length of the slots 62, 63 is also longer than the length of the magnets 23, 24, and the space portions 33, 34 to be holes are formed on the outer peripheral side of the portion in which the magnets 23, 24 are embedded.
  • the outer peripheral side of the space portions 33, 34 of the slots 62, 63 is bridged between the radially outer end of the space portions 33, 34 and the outer region of the steel plate of the rotor 20 so as not to open toward the outer peripheral side.
  • the space portions 33 and 34 are closed in such a manner that the portions Br3 and Br4 are bridged.
  • the strength of the outer edge portion of the annular steel plate 21 is secured by the bridge portions Br3 and Br4, and the magnetic flux of the magnets 23 and 24 leaks from the end portions of the magnets 23 and 24 by the space portions 33 and 34.
  • the magnetic fluxes of the magnets 23 and 24 are configured to gather on the outer peripheral side of the annular steel plate 21, that is, to face the stator 10.
  • a hole 40 is formed on the inner peripheral side of the slots 62 and 63.
  • the hole 40 may suppress leakage magnetic flux from the ends of the magnets 23 and 24 even if it is a single hole, and may be lightweight, in order to maintain the strength of the steel plate 21, the suspension direction is
  • the bridge portion Br5 is bridged so as to be in the inner and outer peripheral directions, that is, the hole 40 is divided into two holes 41 and 42 and sandwiched between the two holes 41 and 42.
  • the bridge portion Br5 is formed on the
  • the bridge portion Br5 By the way, by having the bridge portion Br5 in the steel plate 21, it becomes a passage through which the magnetic flux of the magnets 23, 24 passes, leakage magnetic flux is generated, torque as the IPM motor 1 is reduced, and efficiency may be reduced. There is. Therefore, in the present embodiment, the bridge portions Br5 are provided with the magnetic resistance portions 51 and 52 for reducing the passage of the magnetic flux.
  • the bridge portion Br5 has a length LA, and in these bridge portions Br5, magnetic resistance portions 51 and 52 each having a width LC have an interval of a length LB. It is provided as.
  • the magnetoresistance portions 51 and 52 are portions formed by melting nickel (Ni) and chromium (Cr) as nonmagnetic elements by irradiation with laser light, and by making them stainless steel, the magnetic permeability is original. In other words, the permeability of the steel plate 21 is reduced compared to the other portions of the steel plate 21.
  • the laser beam is irradiated while continuously moving in the stacking direction inside the holes 42 in a state where the plurality of steel plates 21 are stacked, thereby forming the magnetic resistance portions 51 and 52 in the respective steel plates 21 (see FIG. Formation process).
  • the magnetoresistive parts 51 and 52 have resistances so as to have a width LC (see FIG. 2) and to cross the entire width direction in the direction intersecting with the suspension direction of the bridge part Br5.
  • the main body portions 51a and 52a are formed, and the width LC of each of the resistance main body portions 51a and 52a is substantially the irradiation width of the laser light, and is also the limit width which can be formed by the single irradiation of the laser light.
  • the width of the resistor main portions 51a and 52a is preferably larger than the width LC because the magnetic resistance is increased, and more preferably, the entire bridge portion Br5 is melted and demagnetized.
  • the magnetoresistive parts 51 and 52 should be formed to be spaced apart from the width LC of the resistor main parts 51a and 52a, preferably to be further apart than the swelling parts 51b and 52b of the adjacent magnetoresistive parts 51 and 52. become.
  • paths X and Y of magnetic flux are generated as indicated by arrows in the figure.
  • the path X is a path jumping over the magnetoresistance portions 51 and 52 and the path Y
  • the path Y is a path jumping over the magnetoresistance portion 51 and returning to the bridge portion Br5 and jumping again over the magnetoresistance portion 52.
  • the silicon steel plate of the bridge portion Br5 has almost no resistance value of the magnetic resistance RBr5 of the bridge portion Br5, and therefore, the magnetic resistance RY in the path Y is a resistance corresponding to jumping over the magnetic resistance portions 51 and 52. Only the values are added, the value hardly fluctuates depending on the length of the distance LB (see FIG. 2) (hereinafter referred to as “the distance between the magnetic resistance portions LB”) between the magnetic resistance portions 51 and 52.
  • the magnetoresistance RX in the path X is a path jumping over the magnetoresistance portions 51 and 52
  • the resistance value increases as the distance LB between the magnetoresistance portions increases. Therefore, the total magnetic resistance RTO, which is the sum of the magnetic resistance RX and the magnetic resistance RY, has a larger resistance value as the distance between the magnetic resistance portions LB becomes longer.
  • the width of the magnetic resistance portion is doubled by arranging the magnetic resistance portions 51 and 52 continuously adjacent to each other, there is no change in the magnetic resistance RY, and the two magnetic resistance portions 51, 52 The division is made as 52, and as the distance LB between the magnetic resistance portions becomes longer, the resistance value becomes larger, which is effective.
  • the distance LB between the magnetic resistance portions is necessarily larger than the width LC of the resistance main portions 51a and 52a.
  • the resistor main portions 51a and 52a can be formed by laser light.
  • the IPM motor 1 increases as the distance LB between the magnetic resistance portions increases, as shown in FIG. It is possible to increase the maximum torque increase rate of the IPM motor 1 and to improve the maximum output torque of the IPM motor 1, and as shown in FIG. Is increased, and the regeneration efficiency of the IPM motor 1 can be improved.
  • the rotor (20) of this rotating electric machine (1) is In a rotor (20) of a rotating electrical machine (1) in which a plurality of steel plates (21) are stacked and a plurality of magnets (22, 23, 24) are embedded in respective slots (61, 62, 63),
  • the steel plate (21) is sandwiched between a plurality of holes (31, 32, 33, 34, 41, 42) and two holes (41, 42), or the holes (31, 32, 33, 34)
  • a bridge portion (Br1, Br2, Br3, Br4, Br5) sandwiched between the radially outer end of the plate and the outer region of the steel plate (21);
  • the bridge portion (for example, Br5) is disposed at a plurality of places in the suspension direction at intervals, and has a plurality of magnetoresistance portions (51, 52) of which the magnetic permeability is reduced compared to other portions of the steel plate (21).
  • a plurality of magnetic resistance portions 51 and 52 are provided at intervals with respect to one bridge portion Br5.
  • the leakage flux in the bridge portion Br5 can be reduced more efficiently than demagnetizing only the portion. That is, by including the plurality of magnetic resistance portions, the total magnetic resistance RTO in the bridge portion Br5 becomes large, and the leakage flux can be reduced. Therefore, the maximum output torque can be increased and the back electromotive force can be increased, and the fuel efficiency of the vehicle can be improved, or the IPM motor 1 can be made compact and the cost can be reduced.
  • the rotor (20) of this rotating electrical machine (1) is The magnetoresistive portion (51, 52) is disposed to cross the bridge portion (for example, Br5).
  • the bridge portion Br5 is divided by being crossed by the magnetic resistance portions 51 and 52, and the magnetic resistance can be made to have a large resistance value.
  • the rotor (20) of this rotating electrical machine (1) is The magnetoresistive portion (51, 52) is formed by melting the nonmagnetic element by the energy beam.
  • the magnetic resistance portions 51 and 52 can be formed by efficient processing.
  • the rotor (20) of this rotating electrical machine (1) is The magnetoresistive portion (51, 52) of each of the bridge portions (for example, Br5) in the plurality of steel plates (21) irradiates while continuously moving in the stacking direction in a state where the plurality of steel plates (21) are stacked. In this state, the demagnetizing element is melted by the energy beam.
  • the rotor (20) of this rotating electrical machine (1) is The plurality of magnetoresistance portions (51, 52) are disposed in the suspension direction at an interval larger than the width (LC) of each of the magnetoresistance portions (51, 52).
  • the magnetoresistive portions 51 and 52 can be formed by irradiating laser light without being disturbed by the swelling portions (for example, 51 b and 52 b) generated when the magnetoresistive portions 51 and 52 are formed.
  • the rotor (20) of this rotating electrical machine (1) is The holes (41, 42) are disposed on the inner peripheral side of the plurality of magnets (22, 23, 24), The bridge portion (Br5) was bridged so that the suspension direction was the inner and outer circumferential direction.
  • the leakage magnetic flux can be reduced by the magnetic resistance portions 51 and 52 while the strength of the steel plate 21 can be secured.
  • the method of manufacturing the rotor (20) of the rotating electric machine (1) is A plurality of holes (31, 32, 33, 34, 41, 42) and two of the holes (41, 42), or the radially outer end of the holes (31, 32, 33, 34) and a steel plate A plurality of the steel plates (21) having a bridge portion (Br1, Br2, Br3, Br4, Br5) sandwiched between the outer region of (21) and a plurality of magnets (22, 23, 24)
  • a bridge portion for example, Br5
  • a plurality of magnetoresistive portions (51, 52) are disposed at a plurality of intervals in the suspension direction and spaced apart from each other and the magnetic permeability is reduced compared to other portions of the steel plate (21). It has the formation process to form.
  • a plurality of magnetic resistance portions 51 and 52 are formed at intervals with respect to one bridge portion Br5. It is possible to manufacture the rotor 20 in which the leakage flux in the bridge portion Br5 is efficiently reduced rather than demagnetizing only one place. That is, by including the plurality of magnetic resistance portions, the total magnetic resistance RTO in the bridge portion Br5 becomes large, and the leakage flux can be reduced. Therefore, it is possible to increase the maximum output torque and the back electromotive voltage, and efficiently manufacture the IPM motor 1 that can improve the fuel efficiency of the vehicle, or reduce the size and cost.
  • the method of manufacturing the rotor (20) of the rotating electric machine (1) is In the forming step, the magnetoresistive portion (51, 52) is formed to cross the bridge portion (for example, Br5).
  • the bridge portion Br5 is divided by being crossed by the magnetic resistance portions 51 and 52, and the magnetic resistance can be made to have a large resistance value.
  • the method of manufacturing the rotor (20) of the rotating electric machine (1) is In the forming step, the magnetoresistive portion (51, 52) is formed so that the demagnetizing element is melted by an energy beam.
  • the magnetic resistance portions 51 and 52 can be formed by efficient processing.
  • the method of manufacturing the rotor (20) of the rotating electric machine (1) is In the forming step, the energy beam is laminated in a state in which the plurality of steel plates (21) are stacked in the magnetic resistance portions (51, 52) of the bridge portions (for example, Br5) of the plurality of steel plates (21). The irradiation is performed while being continuously moved to form a nonmagnetic element so as to be melted.
  • the method of manufacturing the rotor (20) of the rotating electric machine (1) is In the forming step, the plurality of magnetoresistive portions (51, 52) are formed in the suspension direction at an interval larger than the width (LC) of each of the magnetoresistive portions (51, 52).
  • the magnetoresistive portions 51 and 52 can be formed by irradiating laser light without being disturbed by the swelling portions (for example, 51 b and 52 b) generated when the magnetoresistive portions 51 and 52 are formed.
  • the manufacturing method of the rotor (20) of a rotary electric machine (1) is The holes (41, 42) are disposed on the inner peripheral side of the plurality of magnets (22, 23, 24), The bridge portion (Br5) is bridged so that the suspension direction is the inner and outer circumferential direction.
  • the leakage magnetic flux can be reduced by the magnetic resistance portions 51 and 52 while the strength of the steel plate 21 can be secured.
  • laser light may be irradiated to the magnetoresistive part 51 from the hole 42, and laser light may be irradiated to the magnetoresistive part 52 from the hole 41.
  • the magnetic resistance portion is described as one formed by melting nickel and chromium, but the nonmagnetic element is not limited to these nickel and chromium, and an element which can be made nonmagnetic. If it is, what kind of element may be sufficient.
  • the magnetoresistive element is described as being formed by melting the nonmagnetic element, the present invention is not limited to this, and any material that can reduce the magnetic permeability may be used.
  • a part of the bridge portion can be heated to martensite to lower the magnetic permeability, or crushed to reduce the cross-sectional area to narrow the path of the magnetic flux to lower the magnetic permeability. It can be said that it is a resistance part.
  • the invention is not limited thereto.
  • the leakage flux is reduced. It is good.
  • the holes 41 and 42 are described to be penetrated, but the present invention is not limited thereto.
  • the steel plate 21 may be formed if it can reduce weight and adjust the flow of magnetic flux. It may be a groove-like hole which reduces the thickness.
  • the rotating electrical machine is described as the IPM motor, the present invention is not limited thereto, and may be an SPM motor or a reluctance motor, and the reduction of the leakage flux is required. Any type of motor may be used.
  • the reduction in leakage flux can be expected to improve the torque by the magnet, and in the IPM motor and the reluctance motor, the reduction in leakage flux can also be expected to improve the reluctance torque.
  • the rotor of the present rotating electrical machine and the method of manufacturing the same can be used, for example, for a rotating electrical machine serving as a driving source in a hybrid vehicle, an electric vehicle, etc. It is suitable for use in
  • Rotating electric machine (IPM motor) 20 Rotor 21: Steel plate 22, 23, 24: Magnet 31, 32, 33, 34, 41, 42: Hole (space portion) 51, 52 ⁇ ⁇ ⁇ Magnetoresistive portion 61, 62, 63 ⁇ ⁇ ⁇ Slots Br1, Br2, Br3, Br4, Br5 ⁇ ⁇ ⁇ Bridge portion LC ⁇ ⁇ ⁇

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un rotor (20) qui est conçu par empilement d'une pluralité de plaques d'acier (21) et par enfouissement de la pluralité d'aimants (22, 23, 24) dans des fentes respectives (61, 62, 63). Les plaques d'acier (21) présentent des trous (41, 42) et des parties de pont (Br5) qui sont insérées dans les deux trous (41, 42), les parties de pont (Br5) étant disposées espacées dans une pluralité d'emplacements dans une direction de suspension, et possédant une pluralité de parties de résistance magnétique (51, 52) ayant des perméabilités magnétiques plus petites que d'autres parties des plaques d'acier (21). En conséquence, le flux magnétique de fuite dans les parties de pont (Br5) peut être efficacement réduit.
PCT/JP2018/032665 2017-09-28 2018-09-03 Rotor électrique rotatif et procédé de fabrication de rotor électrique rotatif WO2019065112A1 (fr)

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Application Number Priority Date Filing Date Title
JP2019544483A JPWO2019065112A1 (ja) 2017-09-28 2018-09-03 回転電機のロータ、及び回転電機のロータの製造方法

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JP2017-189124 2017-09-28
JP2017189124 2017-09-28

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WO2019065112A1 true WO2019065112A1 (fr) 2019-04-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022210610A1 (fr) 2021-03-31 2022-10-06 日本製鉄株式会社 Noyau de rotor, rotor et machine électrique rotative

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010220359A (ja) * 2009-03-16 2010-09-30 Yaskawa Electric Corp ロータコアの製造方法と、ロータコア、およびロータとこのロータを有する埋込磁石型回転電機
JP2011114927A (ja) * 2009-11-26 2011-06-09 Mitsubishi Electric Corp 回転子、磁石埋込型電動機、及び、電動圧縮機
JP2013115963A (ja) * 2011-11-30 2013-06-10 Jtekt Corp 回転機用ロータおよびその製造方法
WO2013103118A1 (fr) * 2012-01-06 2013-07-11 愛知製鋼株式会社 Machine synchrone interne de type aimant et rotor pour ce dispositif
JP2014093803A (ja) * 2012-11-01 2014-05-19 Jtekt Corp 回転機用ロータおよび回転機用ロータの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010220359A (ja) * 2009-03-16 2010-09-30 Yaskawa Electric Corp ロータコアの製造方法と、ロータコア、およびロータとこのロータを有する埋込磁石型回転電機
JP2011114927A (ja) * 2009-11-26 2011-06-09 Mitsubishi Electric Corp 回転子、磁石埋込型電動機、及び、電動圧縮機
JP2013115963A (ja) * 2011-11-30 2013-06-10 Jtekt Corp 回転機用ロータおよびその製造方法
WO2013103118A1 (fr) * 2012-01-06 2013-07-11 愛知製鋼株式会社 Machine synchrone interne de type aimant et rotor pour ce dispositif
JP2014093803A (ja) * 2012-11-01 2014-05-19 Jtekt Corp 回転機用ロータおよび回転機用ロータの製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022210610A1 (fr) 2021-03-31 2022-10-06 日本製鉄株式会社 Noyau de rotor, rotor et machine électrique rotative
TWI823314B (zh) * 2021-03-31 2023-11-21 日商日本製鐵股份有限公司 轉子鐵芯、轉子及旋轉電機

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