WO2022250037A1 - 電動モーターのローター - Google Patents
電動モーターのローター Download PDFInfo
- Publication number
- WO2022250037A1 WO2022250037A1 PCT/JP2022/021195 JP2022021195W WO2022250037A1 WO 2022250037 A1 WO2022250037 A1 WO 2022250037A1 JP 2022021195 W JP2022021195 W JP 2022021195W WO 2022250037 A1 WO2022250037 A1 WO 2022250037A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- core
- electric motor
- terminal
- outer peripheral
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 230000035699 permeability Effects 0.000 claims abstract description 24
- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 230000004907 flux Effects 0.000 description 25
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 230000006872 improvement Effects 0.000 description 10
- 239000000428 dust Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
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
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
Definitions
- the present invention relates to rotors for electric motors.
- Patent Documents 1 to 3 below describe rotors of electric motors (hereinafter simply referred to as "rotors").
- the rotor comprises a rotor core and a plurality of permanent magnets.
- the rotor core is a columnar member formed by laminating substantially circular magnetic steel sheets (iron core pieces).
- the rotor core is provided with a plurality of holes for accommodating (embedding) the plurality of permanent magnets. These holes penetrate from one end face to the other end face of the rotor core. These holes are arranged at equal intervals in the circumferential direction of the rotor core.
- a permanent magnet is a plate-like (rod-like) member that extends parallel to the extending direction of the central axis of rotation of the electric motor.
- a permanent magnet is magnetized in its thickness direction. That is, the surface of the permanent magnet is the N pole, and the back surface is the S pole.
- Permanent magnets are arranged in the holes of the rotor core. Thereby, a plurality of magnetic poles (N pole and S pole) are formed at equal intervals in the circumferential direction of the rotor core.
- a plurality of air gaps (slits) for reducing leakage magnetic flux are provided at predetermined positions around each permanent magnet in the rotor core.
- the torque of the electric motor is improved by optimizing the arrangement position of the permanent magnets, the number of permanent magnets, the position of the air gap (magnetic path), etc.
- the purpose of the present invention is to provide a rotor that can improve the average torque of an electric motor (the average value of torque during one revolution of the rotor) compared to conventional rotors.
- the rotor of the electric motor extends in the direction of the central axis of rotation of the electric motor and is rotatably supported around the central axis of rotation.
- the rotor has a plurality of permanent magnets arranged such that N poles and S poles, which are magnetic poles extending parallel to the rotation center axis direction, are alternately formed in the circumferential direction of the rotor.
- an outer peripheral core facing an intermediate portion of the outer peripheral surface of each permanent magnet excluding both ends in the rotation center axis direction, and a pair of terminals arranged at both ends of the rotor in the rotation center axis direction.
- a core The outer core and the terminal core are made of a magnetic material, and the maximum magnetic permeability of the terminal core is equal to or less than the maximum magnetic permeability of the outer core.
- the adjacent outer cores are connected to each other via a connecting portion.
- the maximum magnetic permeability of the connecting portion is equal to or less than the maximum magnetic permeability of the outer peripheral core.
- a rotor for an electric motor includes a central core that extends in the direction of the central axis of rotation and is rotatably supported around the central axis of rotation; Arranged on the outer peripheral surface of the central core, the pair of terminal cores are arranged at both ends of the central core in the direction of the central axis of rotation.
- the terminal core has a positioning portion that defines the positions of the plurality of permanent magnets in the circumferential direction of the outer peripheral portion of the rotor.
- an outer core as a magnetic body is attached to the middle part of the permanent magnet in the longitudinal direction. Therefore, the magnetic flux is concentrated in the intermediate portion in the longitudinal direction of the outer peripheral surface of the rotor.
- this magnetic flux will be referred to as "first magnetic flux”.
- magnetic flux leakage to both end face sides in the longitudinal direction of the rotor is reduced.
- second magnetic flux a magnetic flux directed from the permanent magnets to both ends of the rotor, but these magnetic fluxes are concentrated (short-circuited) in the terminal core as a magnetic body. That is, the second magnetic flux tends not to go in the circumferential direction of the rotor, but in the radial direction of the rotor (see FIG. 6).
- the manner of change between the first torque generated in the rotor by the action of the first magnetic flux and the second torque generated in the rotor by the action of the second magnetic flux is different ( See Figure 7). Specifically, in the process of decreasing the first torque, the second torque increases, and in the process of increasing the first torque, the second torque decreases. Therefore, in the electric motor that employs the rotor according to the present invention, fluctuations in the torque generated in the rotor (the sum of the first torque and the second torque) are small, and the average torque is improved compared to the electric motor that employs the conventional rotor. do.
- FIG. 1 is a perspective view of a rotor according to one embodiment of the invention
- FIG. 2 is an exploded perspective view of the rotor of FIG. 1
- FIG. It is a perspective view of the rotor which concerns on the modification of this invention.
- Figure 4 is an exploded perspective view of the rotor of Figure 3; 4 is a graph showing an example of the relationship between the magnetic field applied to the magnetic steel sheet and the dust core and the magnetic flux density.
- FIG. 4 is a diagram showing directions of magnetic lines of force in terminal cores; 4 is a graph showing torque fluctuations; 1 is a first table showing the average torque improvement rate of an electric motor employing the rotor of the present invention; 4 is a second table showing the improvement in average torque of electric motors employing rotors of the present invention; Fig. 3 is a third table showing the average torque improvement rate of an electric motor employing the rotor of the present invention; 4 is a fourth table showing the average torque improvement rate of an electric motor employing the rotor of the present invention; FIG. 4 is a front view showing the positional relationship between a permanent magnet and an outer core (main body); FIG. 4 is a front view showing an example in which a part of the outer peripheral portion of the terminal core is cut away; It is a table
- the electric motor has a stator.
- a stator is a cylindrical component.
- a plurality of teeth are formed on the inner peripheral surface of the stator. These teeth are arranged at equal intervals in the circumferential direction of the stator.
- a coil is attached to each tooth. That is, the electric wire is wound around the teeth.
- the rotor 1 is a cylindrical part.
- a rotor 1 is housed inside the stator.
- a rotor 1 and a stator are coaxially arranged.
- the rotor 1 has a plurality of magnetic poles (N poles and S poles) extending parallel to the rotation center axis direction. These magnetic poles are arranged at regular intervals in the circumferential direction of the rotor 1 .
- the rotor 1 has 8 magnetic poles (4 north poles and 4 south poles). These N poles and S poles are alternately arranged in the circumferential direction of the rotor 1 .
- Power is supplied to the plurality of coils of the stator in a predetermined order. This causes the rotor 1 to rotate with respect to the stator.
- the rotor 1 includes a central core 10, a plurality of permanent magnets 20 (four permanent magnets 21 and four permanent magnets 22), an outer core 30, and a pair of terminal cores 40, 40, as shown in FIG. .
- the central core 10 is a columnar component, as shown in FIG.
- the central core 10 is a laminate in which a plurality of disk-shaped core pieces 11 are laminated.
- the core piece 11 is formed by punching an electromagnetic steel plate (base material).
- a punched hole PH1 is formed in the center of the core piece 11 .
- the punched hole PH1 has a circular shape.
- the punched holes PH1 communicate with each other when the core pieces 11 are stacked. That is, a through hole TH1 is formed in the central portion of the central core 10 so as to penetrate from one end face to the other end face in the longitudinal direction (extending direction of the central axis).
- a shaft (an output shaft of an electric motor) (not shown) is inserted and fixed into the through hole TH1.
- the permanent magnet 20 is a narrow plate-like component extending parallel to the extending direction of the central axis (rotational central axis) of the central core 10 .
- Permanent magnet 20 is curved along the outer peripheral surface of central core 10 . That is, one surface in the plate thickness direction of the permanent magnet 20 is convex, and the other surface is concave.
- the permanent magnet 20 is magnetized in its thickness direction. That is, the convex side of the permanent magnet 21 is the north pole, and the concave side is the south pole. On the other hand, the convex side of the permanent magnet 22 is the south pole, and the concave side is the north pole.
- Permanent magnets 21 and permanent magnets 22 are alternately arranged in the circumferential direction on the outer peripheral surface of the central core 10 . As a result, eight magnetic poles (four N poles and four S poles) as described above are arranged on the outer peripheral surface of the central core 10 .
- the outer core 30 has a plurality of plate-shaped main body portions 31 that face the surfaces (convex surfaces) of the permanent magnets 21 and 22, and a connecting portion 32 that connects the adjacent main body portions 31 and 31 to each other.
- the body portion 31 is made of a magnetic material
- the connection portion 32 is made of a non-magnetic material.
- the body portion 31 is made of, for example, the same electromagnetic steel sheet as the central core 10 .
- the connection portion 32 is made of, for example, a synthetic resin material (for example, a polyphenylene sulfide resin).
- the body portion 31 extends parallel to the central axis of the central core 10 .
- the length Lc of the body portion 31 is shorter than the length Lm of the permanent magnets 21 and 22 (see FIG. 12).
- Width Wc of body portion 31 is narrower than width Wm of permanent magnets 21 and 22 .
- the body portion 31 is curved along the convex surfaces of the permanent magnets 21 and 22 .
- the body portion 31 is arranged (bonded) to face the central portions of the permanent magnets 21 and 22 . That is, the intermediate portions of the permanent magnets 21 and 22 in the longitudinal direction are covered with the outer core 30, and both longitudinal ends of the permanent magnets 21 and 22 are exposed.
- adjacent body portions 31 are connected via connecting portions 32 . That is, the outer core 30 has a ring shape.
- the main body portion 31 and the connection portion 32 are formed as separate parts and connected to each other.
- a part of the ring-shaped component made of the electromagnetic steel sheet may be irradiated with a laser beam to reform the part and make it non-magnetic.
- the connecting portion 32 may be omitted and the body portions 31 may be adhered to the surfaces of the permanent magnets 21 and 22 .
- the terminal core 40 is a disc-shaped component.
- the outer diameter of terminal cores 40 is greater than the outer diameter of central core 10 .
- a through hole TH2 is provided in the center of the terminal core 40 .
- the inner diameter of the through hole TH2 is the same as the inner diameter of the through hole TH1.
- the terminal cores 40, 40 are attached to both longitudinal end faces of the central core 10, respectively.
- the terminal cores 40, 40 and the central core 10 are arranged coaxially.
- a plurality of (eight) protrusions 41 are provided on the outer peripheral edge of one surface of the terminal cores 40 , 40 . These protrusions 41 are arranged at regular intervals in the circumferential direction of the terminal core 40 . Terminal cores 40 , 40 are bonded to both end surfaces of central core 10 so that convex portion 41 of one terminal core 40 faces convex portion 41 of the other terminal core 40 . An end portion of the permanent magnet 21 (22) is arranged between two convex portions 41 adjacent to each other in the circumferential direction of the terminal core 40 . That is, the convex portion 41 functions as a positioning portion (positional displacement prevention portion) for the permanent magnets 21 (22).
- the terminal core 40 is composed of a dust core (or an electromagnetic steel sheet).
- the maximum magnetic permeability of the terminal core 40 is equal to or lower than the maximum magnetic permeability of the main body portion 31 of the outer core 30 (the maximum value of the gradient of the graph representing the relationship between magnetic field and magnetic flux density shown in FIG. 5).
- first magnetic flux magnetic flux
- second magnetic flux magnetic flux
- the second magnetic flux tends not to go in the circumferential direction ⁇ of the rotor 1 but in the radial direction R of the rotor 1 over the entire circumference of the terminal core 40 .
- FIG. 7 shows the results of computer simulation of the relationship between the rotation angle and the first torque T1 and the second torque T2.
- the modes of change of the first torque T1 and the second torque T2 are different.
- the second torque T2 increases in the process of decreasing the first torque T1
- the second torque T2 decreases in the process of increasing the first torque T1.
- Such an effect can be obtained by providing the convex portion 41 between the end portion of the permanent magnet 21 and the end portion of the permanent magnet 22 .
- the core pieces 11 forming the central core 10 have a simpler shape (the number of punched holes) than the conventional core pieces, so that the central core 10 can be manufactured easily.
- the rotor X has a rotor core as a laminate of electromagnetic steel sheets, like the conventional rotor described above. Permanent magnets are arranged in holes provided in the outer peripheral edge of the rotor core. "50A600” in JIS C 2552-1986 is used as the electromagnetic steel sheet that constitutes the rotor core of rotor X.
- the terminal cores 40, 40 of the rotor Y1 are made of the same electromagnetic steel sheet as the main body 31. As shown in FIG. "50A600" is used as the electromagnetic steel sheet that constitutes the main body portion 31 and the terminal core 40 of the rotor Y1.
- the terminal cores 40, 40 of the rotor Y2 are composed of dust cores. That is, in the rotor Y1, the maximum magnetic permeability of the main body portion 31 and the terminal core 40 are the same. On the other hand, in the rotor Y ⁇ b>2 , the maximum magnetic permeability of the terminal cores 40 is smaller than the maximum magnetic permeability of the main body 31 . "50A600" in JIS C 2552-1986 is adopted as the electromagnetic steel sheet that constitutes the body portion 31 of the rotor Y2.
- the terminal core 40 of the rotor Y2 is an injection-molded body (dust core) made of polyphenylene sulfide resin containing pure iron powder. The content (volume ratio) of pure iron powder in the dust core is about 50%.
- the entire outer core 30 is made of an electromagnetic steel sheet ("50A600”). That is, not only the body portion 31 but also the connecting portion 32 are made of the electromagnetic steel plate (“50A600”).
- the terminal core 40 of the rotor Z1 is made of an electromagnetic steel sheet ("50A600") like the rotor Y1, and the terminal core 40 of the rotor Z2 is made of a dust core like the rotor Y2.
- the portions located between and outside the magnetic poles are non-magnetic, and the maximum magnetic permeability of the terminal core 40 is equal to or less than the maximum magnetic permeability of the main body 31.
- the average torque Tm was able to be improved when Y1 and Y2 were employed.
- the maximum magnetic permeability of the terminal core 40 is smaller than the maximum magnetic permeability of the main body portion 31, compared to the case of employing the rotor Y1 in which the maximum magnetic permeability of the terminal core 40 and the maximum magnetic permeability of the main body portion 31 are the same.
- the average torque Tm could be improved more greatly.
- the average torque Tm could not be improved in the rotors Z1 and Z2 in which the portions of the outer core 30 located between and outside the magnetic poles are magnetic.
- FIG. 9 shows the improvement rate of the average torque Tm when the rotors Y1a to Y1e having different dimensions (length Lc and width Wc (see FIGS. 12 and 14)) of the main body 31 are used.
- the rotors Y1a to Y1e have their main body portions 31 and terminal cores 40 made of electromagnetic steel sheets, like the rotor Y1 shown in FIG.
- the length Lc and width Wc of the main body 31 of the rotors Y2a to Y2e and the length Lm and width Wm of the permanent magnets 21 and 22 are as shown in FIG.
- portions of the outer cores 30 of the rotors Y1a to Y1e that are located between and outside the magnetic poles are gaps.
- FIG. 10 shows the improvement rate of the average torque Tm when the rotors Y2a and Y2b having different dimensions (length Lc and width Wc (see FIG. 14)) of the main body 31 are used.
- the main bodies 31 of the rotors Y2a and Y2b are made of electromagnetic steel sheets, and the terminal cores 40 are made of dust cores.
- the length Lc and width Wc of the main body portion 31 of the rotor Y2a and the rotor Y2b, and the length Lm and width Wm of the permanent magnets 21 and 22 are as shown in FIG. It should be noted that portions of the outer cores 30 of the rotors Y2a and Y2b that are located between and outside the magnetic poles are gaps.
- the average torque Tm when using the rotor YA in which the main body 31 is made of an electromagnetic steel sheet, the terminal core 40 is made of a dust core, and the connection part 32 is made of the same dust core as the terminal core 40 is adopted.
- the improvement rate is shown in the figure.
- a rotor YB is adopted in which the body portion 31 and the terminal cores 40 are made of electromagnetic steel sheets, and both ends in the longitudinal direction of the body portion 31 are connected by the connection portions 32 made of the same electromagnetic steel plate as the body portion 31.
- the figure shows the rate of improvement of the average torque Tm in this case.
- the length Lc and width Wc of the main body 31 of the rotors YA and YB and the length Lm and width Wm of the permanent magnets 21 and 22 are the same as those of the rotor Y2b.
- the terminal core 40 has a disc shape, but as shown in FIG. An arc-shaped notch CP may be provided.
- FIG. 11 shows the improvement rate of the average torque Tm when the rotor YC to the rotor YG provided with such terminal cores 40 is employed.
- the radius Rc2 and the central angle Xm of the inner peripheral edge of the notch CP, the radius Rc1 of the terminal core 40, and the central angle Xc of the fan-shaped portion located between the adjacent notches CP are as shown in FIG. .
- the material of the outer core 30 and terminal core 40 of the rotor YC is the same as that of the rotor Y1c.
- the material of the outer core 30 and terminal core 40 of the rotor YD is the same as that of the rotor YB.
- the material of the outer core 30 and terminal core 40 of the rotor YE is the same as that of the rotor Y2b.
- the material of the outer core 30 and terminal core 40 of the rotor YF is the same as that of the rotor YA.
- the material of the outer core 30 and terminal core 40 of the rotor YG is the same as that of the rotor Z2.
- the ripples (fluctuation range) of the first torque T1 and the second torque T2 are reduced, and the average torque Tm is maximized.
- the maximum magnetic permeability of the connecting portion 32 is smaller than the maximum magnetic permeability of the main body portion 31 .
- the average torque Tm may be improved by devising the shape of the terminal core 40 (rotor YG in FIG. 11). ).
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
以下、本発明の一実施形態に係る「電動モーターのローター1」(以下、単に「ローター1」と称呼する。)について説明する。ここで、ローター1が適用された電動モーターの構成について簡単に説明しておく。電動モーターは、ステーターを備える。ステーターは、円筒状の部品である。ステーターの内周面には、複数のティースが形成されている。これらのティースは、ステーターの周方向に等間隔に配置されている。各ティースには、コイルが組み付けられている。すなわち、ティースに電線が巻きつけられている。
つぎに、ローター1の構成について説明する。ローター1は、図1に示すように、中心コア10、複数の永久磁石20(4個の永久磁石21及び4個の永久磁石22)、外周コア30、及び一対の端末コア40,40を備える。
上記のように、永久磁石21,22の長手方向における中間部に、磁性体としての外周コア30の本体部31が取り付けられている。そのため、ローター1の外周面の長手方向における中間部に磁束が集中する。以下、この磁束を「第1磁束」と称呼する。言い換えれば、ローター1の長手方向における両端面側への磁束漏れが低減される。永久磁石21,22からローター1の両端側へ向かう磁束(漏れ磁束(以下、「第2磁束」と称呼する。))も存在するが、これらの磁束は、磁性体としての端末コア40,40に集中する(短絡する)。すなわち、図6に示したように、第2磁束は、ローター1の周方向θへ向かうのではなく、端末コア40の全周に亘り、ローター1の径方向Rへ向かう傾向にある。
つぎに、従来のローターXを採用した電動モーターの平均トルクTmと、本発明の実施例に係るローターY1,Y2を採用した電動モーターの平均トルクTmとの比較結果(平均トルクTmの向上率(コンピューターシミュレーション結果))を図8に示す。加えて、ローターXを採用し電動モーターの平均トルクTmと、本発明の比較例に係るローターZ1、Z2を採用した電動モーターの平均トルクTmとの比較結果を、同図に併記した。
Claims (5)
- 電動モーターの回転中心軸方向に延設され、前記回転中心軸まわりに回転可能に支持される電動モーターのローターであって、
前記ローターの外周部において、前記回転中心軸方向に平行にそれぞれ延びる磁極であるN極及びS極が、前記ローターの周方向に交互に形成されるように配置された複数の永久磁石と、
前記各永久磁石の外周面のうち、前記回転中心軸方向における両端部を除く中間部に対面配置された外周コアと、
前記ローターの前記回転中心軸方向における両端部に配置された一対の端末コアと、
を備え、
前記外周コア及び前記端末コアが磁性体で構成され、且つ前記端末コアの最大透磁率が、前記外周コアの最大透磁率以下である、
電動モーターのローター。 - 請求項1に記載の電動モーターのローターにおいて、
隣接する前記外周コアが接続部を介して互いに接続されている、
電動モーターのローター。 - 請求項2に記載の電動モーターのローターにおいて、
前記接続部の最大透磁率が、前記外周コアの最大透磁率以下である、
電動モーターのローター。 - 請求項1乃至請求項3のうちのいずれか1つに記載の電動モーターのローターにおいて、
前記回転中心軸方向に延設され、前記回転中心軸のまわりに回転可能に支持される中心コアを備え、
前記複数の永久磁石が、前記中心コアの外周面に配置され、
前記一対の端末コアが、前記中心コアの前記回転中心軸方向における両端部に配置された、
電動モーターのローター。 - 請求項1乃至請求項4のうちのいずれか1つに記載の電動モーターのローターにおいて、
前記端末コアは、前記ローターの外周部の周方向における、複数の前記永久磁石の位置を規定する位置決め部を有する、
電動モーターのローター。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2023523477A JPWO2022250037A1 (ja) | 2021-05-24 | 2022-05-24 | |
EP22811307.2A EP4304054A1 (en) | 2021-05-24 | 2022-05-24 | Rotor of electric motor |
US18/279,311 US20240171025A1 (en) | 2021-05-24 | 2022-05-24 | Rotor for electric motor |
CN202280028379.XA CN117121338A (zh) | 2021-05-24 | 2022-05-24 | 电动马达的转子 |
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JP2021-086785 | 2021-05-24 | ||
JP2021086785 | 2021-05-24 |
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WO2022250037A1 true WO2022250037A1 (ja) | 2022-12-01 |
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PCT/JP2022/021195 WO2022250037A1 (ja) | 2021-05-24 | 2022-05-24 | 電動モーターのローター |
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US (1) | US20240171025A1 (ja) |
EP (1) | EP4304054A1 (ja) |
JP (1) | JPWO2022250037A1 (ja) |
CN (1) | CN117121338A (ja) |
WO (1) | WO2022250037A1 (ja) |
Citations (8)
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JP2007330027A (ja) | 2006-06-07 | 2007-12-20 | Asmo Co Ltd | 埋込磁石型モータ |
JP2011106442A (ja) * | 2009-11-19 | 2011-06-02 | Hyundai Motor Co Ltd | 電気式ウォーターポンプ |
JP2012228101A (ja) * | 2011-04-21 | 2012-11-15 | Hitachi Appliances Inc | 回転電機の回転子 |
WO2015166532A1 (ja) | 2014-04-28 | 2015-11-05 | 三菱電機株式会社 | ロータ、永久磁石埋込型電動機および圧縮機 |
JP2018117488A (ja) | 2017-01-20 | 2018-07-26 | 日本電産株式会社 | ロータ及びそれを用いたモータ |
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2022
- 2022-05-24 JP JP2023523477A patent/JPWO2022250037A1/ja active Pending
- 2022-05-24 CN CN202280028379.XA patent/CN117121338A/zh active Pending
- 2022-05-24 EP EP22811307.2A patent/EP4304054A1/en active Pending
- 2022-05-24 WO PCT/JP2022/021195 patent/WO2022250037A1/ja active Application Filing
- 2022-05-24 US US18/279,311 patent/US20240171025A1/en active Pending
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JPH01166463U (ja) * | 1988-05-10 | 1989-11-21 | ||
JPH08107640A (ja) * | 1994-10-03 | 1996-04-23 | Fanuc Ltd | 同期電動機のロータ |
JP2004129369A (ja) * | 2002-10-02 | 2004-04-22 | Mitsubishi Electric Corp | 回転電機の回転子及びその製造方法 |
JP2007330027A (ja) | 2006-06-07 | 2007-12-20 | Asmo Co Ltd | 埋込磁石型モータ |
JP2011106442A (ja) * | 2009-11-19 | 2011-06-02 | Hyundai Motor Co Ltd | 電気式ウォーターポンプ |
JP2012228101A (ja) * | 2011-04-21 | 2012-11-15 | Hitachi Appliances Inc | 回転電機の回転子 |
WO2015166532A1 (ja) | 2014-04-28 | 2015-11-05 | 三菱電機株式会社 | ロータ、永久磁石埋込型電動機および圧縮機 |
JP2018117488A (ja) | 2017-01-20 | 2018-07-26 | 日本電産株式会社 | ロータ及びそれを用いたモータ |
Also Published As
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CN117121338A (zh) | 2023-11-24 |
US20240171025A1 (en) | 2024-05-23 |
JPWO2022250037A1 (ja) | 2022-12-01 |
EP4304054A1 (en) | 2024-01-10 |
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