TWI495228B - Magnet piece embedded type rotor - Google Patents

Magnet piece embedded type rotor Download PDF

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Publication number
TWI495228B
TWI495228B TW101124583A TW101124583A TWI495228B TW I495228 B TWI495228 B TW I495228B TW 101124583 A TW101124583 A TW 101124583A TW 101124583 A TW101124583 A TW 101124583A TW I495228 B TWI495228 B TW I495228B
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TW
Taiwan
Prior art keywords
magnet
embedded
rotor
convex portion
magnetic pole
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TW101124583A
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Chinese (zh)
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TW201330459A (en
Inventor
Daisuke Nishijima
Haruyuki Hasegawa
Toru Katae
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Mitsubishi Electric Corp
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Publication of TW201330459A publication Critical patent/TW201330459A/en
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Publication of TWI495228B publication Critical patent/TWI495228B/en

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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
    • 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]
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Description

磁鐵埋設型轉子Magnet embedded rotor

本發明係有關一種於轉子鐵心埋設永久磁鐵的磁鐵埋設型轉子。The present invention relates to a magnet-embedded rotor in which a permanent magnet is embedded in a rotor core.

以往，揭示有一種磁鐵埋設型轉子，係為於外緣部環狀地以預定間隔配置埋設有平板狀永久磁鐵的磁鐵埋設孔的轉子鐵心，且具有：磁極部，形成於前述磁鐵埋設孔之外周側；以及小徑部，形成於相鄰的前述磁極部間的外周部，且自旋轉中心起的半徑比前述磁極部小(例如，參照專利文獻1)。In the related art, a magnet-embedded rotor is disclosed in which a rotor core in which a magnet-embedded hole in which a flat-plate-shaped permanent magnet is embedded is disposed at a predetermined interval in an outer edge portion, and a magnetic pole portion is formed in the magnet-embedded hole. The outer peripheral side and the small-diameter portion are formed on the outer peripheral portion between the adjacent magnetic pole portions, and the radius from the center of rotation is smaller than the magnetic pole portion (see, for example, Patent Document 1).

另外，於具有複數對之對於1磁極如大致V字形狀向半徑方向內側逐漸縮短彼此的間隔的方式設置的2個磁鐵埋設孔所構成的磁鐵埋設孔對的轉子中，於前述磁鐵埋設孔的外周側端部與前述轉子外周端之間設有防止磁鐵飛散用的轉子鐵心連結部(薄壁部)，且於該轉子鐵心連結部設置矩形的切口部，前述切口部之周方向長度係較該切口部的某部位的磁鐵埋設孔之外周側端部與鄰接於該磁鐵埋設孔的最近的其他磁鐵埋設孔的外周側端部間之連結彼此的較遠一方之內壁的距離為短。Further, in the rotor in which the pair of magnetic poles are provided with two pairs of magnetic poles, such as a pair of magnetic poles, such as a substantially V-shaped shape, which is gradually shortened to the inner side in the radial direction, the magnet is embedded in the magnet. A rotor core connecting portion (thin portion) for preventing magnet scattering is provided between the outer peripheral end portion and the outer peripheral end of the rotor, and a rectangular cutout portion is provided in the rotor core connecting portion, and the circumferential length of the cutout portion is compared The distance between the outer peripheral side end portion of the magnet-embedded hole of the portion of the notch portion and the outer wall of the outer peripheral end portion of the nearest magnet-embedded hole adjacent to the magnet-embedded hole is short.

(先前技術文獻)(previous technical literature)

(專利文獻)(Patent Literature)

[專利文獻1]日本特開2005-130627號公報[Patent Document 1] Japanese Patent Laid-Open Publication No. 2005-130627

[專利文獻2]日本特開2008-017633號公報[Patent Document 2] JP-A-2008-017633

然而，依據揭示於上述專利文獻1的習知技術，由於轉子的外周面係成為曲面，故當將外周面夾持(chuck)而壓入旋轉軸等時，夾盤(chuck)與外周面將成為點接觸，而容易引起夾盤的位置偏移。因此，於磁鐵插入孔與轉子的外周面之間的薄壁部將施加有過大的夾持(chucking)力，而存在有導致薄壁部變形的問題。However, according to the conventional technique disclosed in Patent Document 1, since the outer peripheral surface of the rotor is curved, when the outer peripheral surface is chucked and pressed into the rotating shaft or the like, the chuck and the outer peripheral surface are It becomes a point contact and easily causes the position of the chuck to shift. Therefore, an excessive clamping force is applied to the thin portion between the magnet insertion hole and the outer peripheral surface of the rotor, and there is a problem that the thin portion is deformed.

另外，依據於上述專利文獻2所揭示的習知技術，雖可將矩形的切口部予以夾持，但若切口部的夾盤位置往左右偏移，則將對磁鐵插入孔與切口部之間的薄壁部施加夾持力，而與上述情形相同地存在有導致薄壁部變形的問題。Further, according to the conventional technique disclosed in Patent Document 2, the rectangular notched portion can be sandwiched. However, if the position of the chuck of the notched portion is shifted to the left and right, the magnet insertion hole and the notch portion are interposed therebetween. The thin wall portion applies a clamping force, and as in the case described above, there is a problem that the thin portion is deformed.

本發明係有鑑於上述事情而研發者，其目的為獲得一種夾盤位置不易偏離且不會導致磁鐵埋設孔與外周面之間的薄壁部變形的磁鐵埋設型轉子。The present invention has been made in view of the above circumstances, and an object thereof is to obtain a magnet-embedded rotor in which the position of the chuck is not easily deviated and the thin portion between the magnet-embedded hole and the outer peripheral surface is not deformed.

為了解決上述課題並達成目的，本發明係具有疊層鋼板而形成的圓柱狀的轉子鐵心，該轉子鐵心係具有：複數個磁鐵埋設孔，在外緣部以預定間隔配置成環狀；磁極部，形成於前述磁鐵埋設孔之外周側；凸條(rib)部，形成於相鄰的前述磁鐵埋設孔間且與前述磁極部兩側的橋部(bridge)連接；以及凸部，係從前述橋部與凸條部的連接部朝外側突出且前端呈平坦狀。In order to solve the above problems and achieve the object, the present invention is a cylindrical rotor core formed by laminating steel sheets, the rotor core having a plurality of magnet embedding holes arranged in a ring shape at predetermined intervals on the outer edge portion, and a magnetic pole portion. Formed on the outer peripheral side of the magnet embedding hole; a rib portion is formed between the adjacent magnet embedding holes and connected to a bridge on both sides of the magnetic pole portion; and a convex portion is formed from the bridge The connecting portion of the portion and the ridge portion protrudes outward and the front end is flat.

本發明之磁鐵埋設型轉子係由於若夾持前端呈平坦狀的凸部則夾盤與凸部的前端將面接觸，故夾盤位置不易偏移，且由於凸部係從橋(bridge)部與凸條(rib)部的連接部朝外側突出，故夾盤的壓縮力將從凸部傳達至凸條部，而具有不會導致薄壁的橋部變形的效果。In the magnet-embedded rotor of the present invention, since the front end of the chuck and the convex portion are in surface contact when the front end of the clamping end is flat, the position of the chuck is not easily displaced, and the convex portion is branched from the bridge portion. Since the connecting portion with the rib portion protrudes outward, the compressive force of the chuck is transmitted from the convex portion to the ridge portion, and the joint portion does not cause deformation of the thin portion.

以下，根據圖式詳細說明本發明之磁鐵埋設型轉子的實施形態。又，本發明並非由該實施形態所限定。Hereinafter, an embodiment of the magnet-embedded rotor of the present invention will be described in detail based on the drawings. Further, the present invention is not limited to the embodiment.

第1實施形態First embodiment

第1圖為表示本發明之磁鐵埋設型轉子的第1實施形態的橫剖面圖，第2圖為第1圖之A部放大圖。Fig. 1 is a cross-sectional view showing a first embodiment of a magnet-embedded rotor according to the present invention, and Fig. 2 is an enlarged view of a portion A in Fig. 1.

如第1圖及第2圖所示，磁鐵埋設型轉子91的轉子鐵心2係將薄矽鋼板(磁性體)多數疊層而形成圓柱狀，藉由未圖示的鉚釘(rivet)等而一體化。在形成於轉子鐵心2之中心的軸孔2a係壓入且固定有軸(shaft)4。As shown in Fig. 1 and Fig. 2, the rotor core 2 of the magnet-embedded rotor 91 is formed by laminating a plurality of thin steel sheets (magnetic materials) to form a columnar shape, and is integrally formed by a rivet or the like (not shown). Chemical. A shaft 4 is press-fitted and fixed to the shaft hole 2a formed at the center of the rotor core 2.

10片的平板狀永久磁鐵3係以旋轉中心O為中心而成為正10角形的各邊的方式埋設於在轉子鐵心2的外緣部以預定間隔環狀配置的磁鐵埋設孔2b。於轉子鐵心2的磁鐵埋設孔2b之外周側形成有磁極部2c。The ten plate-shaped permanent magnets 3 are embedded in the magnet-embedded holes 2b that are annularly arranged at predetermined intervals on the outer edge portion of the rotor core 2 so as to be the sides of the positive ten-corner shape centering on the rotation center O. A magnetic pole portion 2c is formed on the outer peripheral side of the magnet embedding hole 2b of the rotor core 2.

於相鄰的2個磁鐵埋設孔2b間形成有凸條部2d。磁極部2c之兩側的薄壁的橋部2e係連接於凸條部2d。從旋轉中心O至橋部2e的外周為止的半徑Re係較至磁極部2c中央部外周為止的半徑Rc更小。A ridge portion 2d is formed between the adjacent two magnet-embedded holes 2b. The thin bridge portion 2e on both sides of the magnetic pole portion 2c is connected to the ridge portion 2d. The radius Re from the rotation center O to the outer circumference of the bridge portion 2e is smaller than the radius Rc to the outer circumference of the central portion of the magnetic pole portion 2c.

亦即，磁極部2c的外周係成為彎曲形狀，而成為與磁 磁部2c中央相比，相鄰的磁極部2c間凹陷的形狀。此乃因藉由使磁極部2c彎曲而減低與未圖示的定子線圈交鎖的磁通之高頻成分，而使感應電壓接近於正弦波之故。That is, the outer circumference of the magnetic pole portion 2c is curved and becomes magnetic The shape of the magnetic pole portion 2c is recessed between the adjacent magnetic pole portions 2c. This is because the magnetic pole portion 2c is bent to reduce the high-frequency component of the magnetic flux that is interlocked with the stator coil (not shown), so that the induced voltage is close to the sine wave.

橋部2e係以磁飽和而難以供磁通通過之方式，於不影響加工的範圍內，儘可能地形成為直徑方向的寬度狹窄(例如為矽鋼板的板厚以下)即可。The bridge portion 2e may be magnetically saturated and it is difficult to allow the magnetic flux to pass therethrough, and may have a narrow width in the diameter direction (for example, a plate thickness of the ruthenium steel sheet) as far as possible within a range that does not affect the processing.

從橋部2e與凸條部的連接部朝外側突出有凸部2f。凸部2f的前端係成為與通過旋轉中心O及凸條部2d中心的經線S成正交的前端平面2g。從旋轉中心O至前端平面2g為止的半徑Rg係較磁極部2c中央部外周為止的半徑Rc小。The convex portion 2f protrudes outward from the connection portion between the bridge portion 2e and the ridge portion. The front end of the convex portion 2f is a front end plane 2g orthogonal to the warp S passing through the center of the rotation center O and the ridge portion 2d. The radius Rg from the rotation center O to the front end plane 2g is smaller than the radius Rc from the outer periphery of the central portion of the magnetic pole portion 2c.

磁鐵埋設型轉子91的製造步驟中，夾持轉子鐵心2時，係採用將挾著旋轉中心O而相對向的凸部2f的前端平面2g予以夾持的方式。由於前端平面2g係與未圖示的夾盤之夾盤面成面接觸，故即使旋轉力等作用於轉子鐵心2，亦不會有轉子鐵心2從夾盤脫離的情形。In the manufacturing process of the magnet-embedded rotor 91, when the rotor core 2 is sandwiched, the front end plane 2g of the convex portion 2f facing the rotation center O is sandwiched. Since the front end plane 2g is in surface contact with the chuck surface of the chuck (not shown), even if a rotational force or the like acts on the rotor core 2, the rotor core 2 does not come off the chuck.

另外，若夾持凸部2f的前端平面2g，則其壓縮力將直接傳達於凸條部2d，故不會於橋部2e產生應力，亦不會於凸條部2d產生彎曲應力，亦不會有橋部2e變形的情形。另外，萬一夾盤從凸部2f的中央偏離，亦不會接觸於橋部2e，而不會導致橋部2e變形。Further, when the front end plane 2g of the convex portion 2f is sandwiched, the compressive force is directly transmitted to the ridge portion 2d, so that no stress is generated in the bridge portion 2e, and no bending stress is generated in the ridge portion 2d, nor is it There is a case where the bridge portion 2e is deformed. Further, in the event that the chuck is deviated from the center of the convex portion 2f, it does not come into contact with the bridge portion 2e, and the bridge portion 2e is not deformed.

如第2圖所示，將凸部2f的前端平面2g之周圍方向的寬度Hg設為較凸條部2d的寬度Hd更大。藉此，防止凸部2f較凸條部2d先彎曲。另外，若凸部2f的前端平面 2g之周方向的寬度Hg較小，則凸部2f將因夾盤之壓縮力而變形，而於轉子鐵心2產生扭曲應力等不均勻的應力，但可藉由增大寬度Hg而防止不均勻應力的產生。As shown in Fig. 2, the width Hg in the peripheral direction of the front end plane 2g of the convex portion 2f is made larger than the width Hd of the ridge portion 2d. Thereby, the convex portion 2f is prevented from being bent first than the convex portion 2d. In addition, if the front end plane of the convex portion 2f When the width Hg in the circumferential direction of 2g is small, the convex portion 2f is deformed by the compressive force of the chuck, and uneven stress such as torsional stress is generated in the rotor core 2, but unevenness can be prevented by increasing the width Hg. The generation of stress.

然而，若凸部2f之前端平面2g的周方向之寬度Hg過大，則因與定子線圈交鎖的磁通之高頻成分增加，且於感應電壓亦重疊有高頻成分，故需要注意。若將定子與凸部2f之前端平面2g間的間隙(gap)設為定子與磁極部2c間之間隙的2倍程度，則不會有因凸部2f而導致磁通之高頻成分增加的情形。However, if the width Hg of the front end plane 2g of the convex portion 2f in the circumferential direction is excessively large, the high-frequency component of the magnetic flux that is interlocked with the stator coil increases, and the high-frequency component is superimposed on the induced voltage. When the gap between the stator and the front end plane 2g of the convex portion 2f is twice as large as the gap between the stator and the magnetic pole portion 2c, the high frequency component of the magnetic flux does not increase due to the convex portion 2f. situation.

第2實施形態Second embodiment

第3圖係表示本發明之磁鐵埋設型轉子之第2實施形態的橫剖面要部放大圖。如第3圖所示，第2實施形態的磁鐵埋設型轉子92係於凸部2f的兩側的橋部2e埋設有半圓狀的凹部2h。第2實施形態的磁鐵埋設型轉子92係除了設有凹部2h以外，並無與第1實施形態之磁鐵埋設型轉子91不同之處。Fig. 3 is an enlarged plan view showing a principal part of a cross section of a second embodiment of the magnet-embedded rotor of the present invention. As shown in Fig. 3, the magnet-embedded rotor 92 of the second embodiment has a semicircular recess 2h embedded in the bridge portion 2e on both sides of the convex portion 2f. The magnet-embedded rotor 92 of the second embodiment is different from the magnet-embedded rotor 91 of the first embodiment except that the recess 2h is provided.

藉由於凸部2f的兩側的橋部2e設置半圓狀的凹部2h，即可防止因凸部2f產生的感應電壓之高頻成分的重疊。藉由使凹部2h成為半圓狀，而可緩和因作用於凸部2f的壓縮力所導致的應力集中。By providing the semicircular recess 2h in the bridge portion 2e on both sides of the convex portion 2f, it is possible to prevent the superposition of the high-frequency components of the induced voltage generated by the convex portion 2f. By making the concave portion 2h semicircular, stress concentration due to the compressive force acting on the convex portion 2f can be alleviated.

第3實施形態Third embodiment

第4圖為表示本發明之磁鐵埋設型轉子之第3實施形態的橫剖面要部放大圖。第3實施形態之磁鐵埋設型轉子93係使轉子鐵心32之外周部成為真圓。因此，從旋轉中 心O(參照第1圖)至磁極部32c之外周部、橋部32e之外周部、以及凸部32f之前端平面32g為止的半徑係皆相同。為了形成凸部32f，於凸部32f之兩側的橋部32e形成有半圓狀的凹部32h。Fig. 4 is an enlarged plan view showing a principal part of a cross section of a third embodiment of the magnet-embedded rotor of the present invention. In the magnet-embedded rotor 93 of the third embodiment, the outer peripheral portion of the rotor core 32 is made true. So from the rotation The radius of the center O (see Fig. 1) to the outer peripheral portion of the magnetic pole portion 32c, the outer peripheral portion of the bridge portion 32e, and the front end surface 32g of the convex portion 32f are all the same. In order to form the convex portion 32f, the bridge portion 32e on both sides of the convex portion 32f is formed with a semicircular concave portion 32h.

2‧‧‧轉子鐵心2‧‧‧Rotor core

2a‧‧‧軸孔2a‧‧‧Axis hole

2b‧‧‧磁鐵埋設孔2b‧‧‧Magnetic buried holes

2c、32c‧‧‧磁極部2c, 32c‧‧‧ magnetic pole

2d‧‧‧凸條部2d‧‧‧Bars

2e、32e‧‧‧橋部2e, 32e‧‧ ‧ Bridge

2f、32f‧‧‧凸部2f, 32f‧‧‧ convex

2g、32g‧‧‧前端平面2g, 32g‧‧‧ front plane

2h、32h‧‧‧凹部2h, 32h‧‧‧ recess

3‧‧‧永久磁鐵3‧‧‧ permanent magnet

4‧‧‧軸4‧‧‧Axis

91、92、93‧‧‧磁鐵埋設型轉子91, 92, 93‧‧‧Magnetic embedded rotor

O‧‧‧旋轉中心O‧‧‧ Rotation Center

Rc、Re、Rg‧‧‧半徑Radius of Rc, Re, Rg‧‧

S‧‧‧經線S‧‧‧ warp

第1圖係表示本發明之磁鐵埋設型轉子的第1實施形態的橫剖面圖。Fig. 1 is a cross-sectional view showing a first embodiment of a magnet-embedded rotor according to the present invention.

第2圖係第1圖的A部放大圖。Fig. 2 is an enlarged view of a portion A of Fig. 1.

第3圖係表示本發明之磁鐵埋設型轉子的第2實施形態的橫剖面要部放大圖。Fig. 3 is an enlarged plan view showing a principal part of a cross section of a second embodiment of the magnet-embedded rotor of the present invention.

第4圖係表示本發明之磁鐵埋設型轉子的第3實施形態的橫剖面要部放大圖。Fig. 4 is an enlarged plan view showing a principal part of a cross section of a third embodiment of the magnet-embedded rotor of the present invention.

2‧‧‧轉子鐵心2‧‧‧Rotor core

2b‧‧‧磁鐵埋設孔2b‧‧‧Magnetic buried holes

2c‧‧‧磁極部2c‧‧‧Magnetic pole

2d‧‧‧凸條部2d‧‧‧Bars

2e‧‧‧橋部2e‧‧ ‧Bridge

2f‧‧‧凸部2f‧‧‧ convex

2g‧‧‧前端平面2g‧‧‧ front plane

3‧‧‧永久磁鐵3‧‧‧ permanent magnet

4‧‧‧軸4‧‧‧Axis

91‧‧‧磁鐵埋設型轉子91‧‧‧Magnetic embedded rotor

O‧‧‧旋轉中心O‧‧‧ Rotation Center

Rc、Re、Rg‧‧‧半徑Radius of Rc, Re, Rg‧‧

S‧‧‧經線S‧‧‧ warp

Claims (2)

一種磁鐵埋設型轉子，係具有疊層鋼板而形成的圓柱狀的轉子鐵心，該轉子鐵心係具有：複數個磁鐵埋設孔，在外緣部以預定間隔配置成環狀；磁極部，形成於前述磁鐵埋設孔之外周側；凸條部，形成於相鄰的前述磁鐵埋設孔間而與前述磁極部兩側的橋部連接；以及凸部，係從前述橋部與凸條部的連接部朝外側突出且前端呈平坦狀；將前述凸部的周方向寬度設為較前述凸條部的周方向寬度更大，於前述凸部兩側的橋部係形成有半圓狀的凹部，從磁鐵埋設型轉子之旋轉中心至前述凸部之前端為止的半徑係與從前述旋轉中心起至前述磁極部的中央部外周為止的半徑相同。 A magnet-embedded rotor is a cylindrical rotor core formed by laminating steel sheets, the rotor core having a plurality of magnet-embedded holes arranged in a ring shape at predetermined intervals on an outer edge portion, and a magnetic pole portion formed on the magnet The outer peripheral side of the hole is embedded; the ridge portion is formed between the adjacent magnet-embedded holes and connected to the bridge portion on both sides of the magnetic pole portion; and the convex portion is outwardly connected from the connecting portion of the bridge portion and the ridge portion The protruding portion has a flat front end; the circumferential width of the convex portion is larger than a circumferential width of the convex portion, and a semicircular concave portion is formed on a bridge portion on both sides of the convex portion, and the magnet is embedded in a shape. The radius from the center of rotation of the rotor to the front end of the convex portion is the same as the radius from the center of rotation to the outer circumference of the central portion of the magnetic pole portion. 如申請專利範圍第1項所述之磁鐵埋設型轉子，其中，前述橋部之直徑方向的寬度為前述鋼板之板厚以下。 The magnet-embedded rotor according to the first aspect of the invention, wherein the width of the bridge portion in the diameter direction is equal to or less than a thickness of the steel sheet.
TW101124583A 2012-01-11 2012-07-09 Magnet piece embedded type rotor TWI495228B (en)

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PCT/JP2012/050402 WO2013105236A1 (en) 2012-01-11 2012-01-11 Embedded magnet rotor

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TWI495228B true TWI495228B (en) 2015-08-01

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WO2017038489A1 (en) * 2015-09-01 2017-03-09 三菱電機株式会社 Rotor, rotating electric machine, electric compressor, and refrigeration/air-conditioning device
CN105610257B (en) * 2016-03-07 2019-11-29 广东美芝制冷设备有限公司 Rotor core, rotor, motor and compressor
BG67504B1 (en) * 2020-12-10 2023-03-15 Алмотт Груп Ад Brushless electrical machine with excitation by permanent magnets

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JP2002165394A (en) * 2000-09-13 2002-06-07 Sanyo Denki Co Ltd Synchronous motor with built-in permanent magnet
JP2004072845A (en) * 2002-08-02 2004-03-04 Aichi Elec Co Permanent magnetic motor
JP2005354798A (en) * 2004-06-10 2005-12-22 Fujitsu General Ltd Electric motor
JP2007181346A (en) * 2005-12-28 2007-07-12 Fanuc Ltd Motor and rotor core thereof, and method for manufacturing electric motor
WO2007125753A1 (en) * 2006-04-24 2007-11-08 Fujitsu General Limited Buried magnet rotor, motor using this rotor, and compressor using this motor
JP2009118687A (en) * 2007-11-08 2009-05-28 Nissan Motor Co Ltd Permanent magnet type rotating machine
JP2009278860A (en) * 2009-06-26 2009-11-26 Hitachi Ltd Permanent magnet rotating electric machine and electric vehicle using the same
JP2011062059A (en) * 2009-09-14 2011-03-24 Toyota Industries Corp Permanent magnet embedded rotating electrical machine
JP2011114927A (en) * 2009-11-26 2011-06-09 Mitsubishi Electric Corp Rotor, magnet embedded electric motor, and electric compressor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002165394A (en) * 2000-09-13 2002-06-07 Sanyo Denki Co Ltd Synchronous motor with built-in permanent magnet
JP2004072845A (en) * 2002-08-02 2004-03-04 Aichi Elec Co Permanent magnetic motor
JP2005354798A (en) * 2004-06-10 2005-12-22 Fujitsu General Ltd Electric motor
JP2007181346A (en) * 2005-12-28 2007-07-12 Fanuc Ltd Motor and rotor core thereof, and method for manufacturing electric motor
WO2007125753A1 (en) * 2006-04-24 2007-11-08 Fujitsu General Limited Buried magnet rotor, motor using this rotor, and compressor using this motor
JP2009118687A (en) * 2007-11-08 2009-05-28 Nissan Motor Co Ltd Permanent magnet type rotating machine
JP2009278860A (en) * 2009-06-26 2009-11-26 Hitachi Ltd Permanent magnet rotating electric machine and electric vehicle using the same
JP2011062059A (en) * 2009-09-14 2011-03-24 Toyota Industries Corp Permanent magnet embedded rotating electrical machine
JP2011114927A (en) * 2009-11-26 2011-06-09 Mitsubishi Electric Corp Rotor, magnet embedded electric motor, and electric compressor

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