JP2015070768A - Permanent magnet type electric rotating machine - Google Patents

Permanent magnet type electric rotating machine Download PDF

Info

Publication number
JP2015070768A
JP2015070768A JP2013205873A JP2013205873A JP2015070768A JP 2015070768 A JP2015070768 A JP 2015070768A JP 2013205873 A JP2013205873 A JP 2013205873A JP 2013205873 A JP2013205873 A JP 2013205873A JP 2015070768 A JP2015070768 A JP 2015070768A
Authority
JP
Japan
Prior art keywords
permanent magnet
opening
magnet type
long
type rotating
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.)
Pending
Application number
JP2013205873A
Other languages
Japanese (ja)
Inventor
活徳 竹内
Katsunori Takeuchi
活徳 竹内
真琴 松下
Makoto Matsushita
真琴 松下
豊 橋場
Yutaka Hashiba
豊 橋場
則雄 高橋
Norio Takahashi
則雄 高橋
大輔 三須
Daisuke Misu
大輔 三須
結城　和明
Kazuaki Yuki
和明 結城
寿郎 長谷部
Toshiro Hasebe
寿郎 長谷部
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2013205873A priority Critical patent/JP2015070768A/en
Publication of JP2015070768A publication Critical patent/JP2015070768A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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

Landscapes

  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a permanent magnet type electric rotating machine increased in torque density by effective use of the magnetic flux of the magnet.SOLUTION: A permanent magnet type electric rotating machine has an aperture configured by connecting in its rotor a straight part and a circular arc part and arranging a permanent magnet in the aperture. In the permanent magnet, two shorter sides connecting two longer side end parts have end parts, either of the shorter side parts is polygonally shaped, and its contact with the straight part of the aperture effectively saturates a bridge part magnetically thereby to reduce leak magnetic fluxes, resulting in increased torque density of the rotating machine.

Description

本発明の実施形態は、永久磁石式回転電機に関する。 Embodiments described herein relate generally to a permanent magnet type rotating electrical machine.

永久磁石の特性向上に伴って、より小型で高出力な永久磁石式回転電機が開発されている。このような背景の下、回転電機の応用範囲は従来から利用されてきた鉄道駆動用から、ハイブリッド自動車、さらには電気自動車へと広がっている。ハイブリッド自動車への適用では限られたスペースに配置できる小型化が求められ、電気自動車への適用では小型化に加えて高出力化が求められており、適用範囲の拡大に応じてますます出力密度の高いモータ特性が求められている。 Along with the improvement in the characteristics of permanent magnets, smaller and higher output permanent magnet type rotating electrical machines have been developed. Under such a background, the application range of rotating electrical machines has expanded from the conventionally used railway drive to a hybrid vehicle and further to an electric vehicle. Application to hybrid vehicles requires miniaturization that can be placed in a limited space, and application to electric vehicles requires high output in addition to miniaturization. Increasing output density as the application range increases High motor characteristics are demanded.

モータ一般において、図８に示すように遠心力による応力の緩和や機械的強度を向上させるために、回転子円周部にから回転子の開口部まで（図８に示すｄ軸方向）幅１．５〜２．５ ｍｍ程度の鉄心ブリッジ部１０が必要である。また、Ｖ字、Ｕ字などの磁石配置とした場合には、図８に示すｄ軸を中心線として左の磁石穴と右の磁石穴の間にも幅３〜５ ｍｍ程度のブリッジ部２０を設定することで機械強度を保っている。 In general motors, as shown in FIG. 8, in order to relieve stress due to centrifugal force and improve the mechanical strength, the width 1 from the rotor circumference to the rotor opening (d-axis direction shown in FIG. 8) An iron core bridge portion 10 of about 5 to 2.5 mm is required. In addition, when the magnet arrangement such as V-shape and U-shape is adopted, the bridge portion 20 having a width of about 3 to 5 mm between the left magnet hole and the right magnet hole with the d axis shown in FIG. 8 as the center line. The mechanical strength is maintained by setting.

特許第４１３５０１８号Japanese Patent No. 4135018 特許第５００５８３０号Patent No. 5005830

しかしながら、これらのブリッジ部においてはトルクに寄与しない漏れ磁束が発生し、永久磁石の磁束が有効に活かせず、高トルク密度化を阻害する要因となっていた。上記の先行技術文献に代表される従来技術においては、この漏れ磁束を抑制するためにブリッジ部を狭くする、また漏れ磁束の流れを堰き止めるように非磁性部を構成することにより、漏れ磁束の流れる磁路を磁気飽和させることによって磁気抵抗を増加させ、漏れ磁束を抑制する工夫を行っていた。しかし、これらの方法では磁気飽和が不完全であるために、依然として大きな漏れ磁束が発生していた。 However, a leakage magnetic flux that does not contribute to torque is generated in these bridge portions, and the magnetic flux of the permanent magnet cannot be used effectively, which is a factor that hinders the increase in torque density. In the prior art represented by the above prior art documents, the bridge portion is narrowed in order to suppress the leakage magnetic flux, and the nonmagnetic portion is configured so as to block the leakage magnetic flux flow. The magnetic resistance is increased by magnetically saturating the flowing magnetic path, and the leakage flux is devised. However, these methods still have a large magnetic flux leakage due to imperfect magnetic saturation.

本発明が解決しようとする課題は、磁石磁束を有効に利用してトルクを高密度化した永久磁石式回転電機を実現することである。 The problem to be solved by the present invention is to realize a permanent magnet type rotating electrical machine in which torque is increased in density by effectively using magnet magnetic flux.

第１の実施形態の永久磁石式回転電機の全体構成を示す図である。It is a figure which shows the whole structure of the permanent magnet type rotary electric machine of 1st Embodiment. 永久磁石式回転電機における回転子開口部と永久磁石形状の例である。It is an example of the rotor opening part and permanent magnet shape in a permanent magnet type rotary electric machine. 回転子開口部に挿入する永久磁石の形状の図である。It is a figure of the shape of the permanent magnet inserted in a rotor opening part. 従来の技術における永久磁石式回転電機に具備された永久磁石の磁化方向の図である。It is a figure of the magnetization direction of the permanent magnet with which the permanent magnet type rotary electric machine in the prior art was equipped. 第１の実施形態における永久磁石式回転電機内部の磁束の流れを表す図である。It is a figure showing the flow of the magnetic flux inside the permanent-magnet-type rotary electric machine in 1st Embodiment. 永久磁石の形状を変化させた時の速度−トルク特性表す図である。It is a figure showing the speed-torque characteristic when the shape of a permanent magnet is changed. 第２に実施形態における永久磁石の磁化方向と磁束の流れ表す図である。It is a figure showing the magnetization direction of the permanent magnet in 2nd Embodiment, and the flow of magnetic flux. 従来の永久磁石式回転電機における磁束線図である。It is a magnetic flux diagram in the conventional permanent magnet type rotary electric machine.

以下、実施形態の永久磁石回転電機について図面を参照して説明する。 Hereinafter, a permanent magnet rotating electric machine according to an embodiment will be described with reference to the drawings.

（第１の実施形態）
第１の実施形態について図を参照し、詳細に説明する。図１は、第１の実施形態の永久磁石式回転電機の全体図である。第１の実施形態の一例を示すこの図面においては、６極モータの１極あたりに２個の永久磁石をＶ字状に配置した構成を例として説明する。 (First embodiment)
The first embodiment will be described in detail with reference to the drawings. FIG. 1 is an overall view of the permanent magnet type rotating electric machine according to the first embodiment. In this drawing showing an example of the first embodiment, a configuration in which two permanent magnets are arranged in a V shape per one pole of a six-pole motor will be described as an example.

図１は、第１の実施形態の永久磁石式回転電機（６極モータあたりの１極）の径方向断面図である。図１において固定子１１は、固定子スロット１４、固定子コアバック１３、固定子ティース１２を有している。このとき、固定子コアバック１３は、固定子コアバック１３から突出した凸部の部分を有する。この凸部が固定子ティース１２である。また、固定子ティース１２と隣り合う固定子ティース１２間の凹部部分が固定子スロット１４となる。固定子１１は、主に鉄にケイ素を添加することによって製造された薄板の電磁鋼板といわれる材料を積層して構成される。固定子スロット１４には銅で構成された電機子巻線１５が具備されている。 FIG. 1 is a radial sectional view of a permanent magnet type rotating electrical machine (one pole per six pole motor) of the first embodiment. In FIG. 1, the stator 11 has a stator slot 14, a stator core back 13, and a stator tooth 12. At this time, the stator core back 13 has a convex portion protruding from the stator core back 13. This convex portion is a stator tooth 12. Further, a recessed portion between the stator teeth 12 adjacent to the stator teeth 12 serves as a stator slot 14. The stator 11 is formed by laminating a material called a thin electromagnetic steel plate manufactured mainly by adding silicon to iron. The stator slot 14 is provided with an armature winding 15 made of copper.

回転子１６は、固定子１１の固定子ティース１２と間隙を介して固定子１１の内周側に配置される。図１における回転子１６は主に、鉄にケイ素を添加することによって製造された薄板の電磁鋼板といわれる材料を積層して構成される。回転子１６において、主たる磁束の方向をｑ軸とし、ｑ軸に電気的・磁気的に直交する方向をｄ軸とする。 The rotor 16 is arranged on the inner peripheral side of the stator 11 through a gap with the stator teeth 12 of the stator 11. The rotor 16 in FIG. 1 is mainly constituted by laminating a material called a thin electromagnetic steel plate manufactured by adding silicon to iron. In the rotor 16, the main magnetic flux direction is the q axis, and the direction perpendicular to the q axis electrically and magnetically is the d axis.

また、回転子１６は、第１開口部３３、第２開口部１３３、第３開口部２３３、複数個の永久磁石を有している。第１開口部３３及び第２開口部１３３には、多角形の永久磁石３２、１３２がそれぞれ取り付けられている。このとき、固定子１１側の第１開口部３３側面と永久磁石３２の端部は乖離しており、空洞が形成される。この空洞を第１磁気障壁３３ａとする。また、後述する回転子シャフト１７側の第１開口部３３側面との永久磁石３２の端部は乖離しており、空洞が形成される。この空洞を第２磁気障壁３３ｂとする。第２開口部１３３は、第１開口部３３に対してｄ軸を中心軸として対称となるように設けられている。第１開口部３３と同様に第２開口部１３３は、第１磁気障壁１３３ａと第２磁気障壁１３３ｂを有している。また、第３開口部２３３は、第１開口部３３と第２開口部１３３の間かつ固定子１１側に、略三角形の形状で設けられている。また、機械的強度を保つために第２磁気障壁３３ｂと第２磁気障壁１３３ｂの間にはブリッジ部２０が構成されている。同様に、第１磁気障壁３３ａと回転子１６の外周側面の間にも外周部ブリッジ部１０が構成されている。 The rotor 16 includes a first opening 33, a second opening 133, a third opening 233, and a plurality of permanent magnets. Polygonal permanent magnets 32 and 132 are attached to the first opening 33 and the second opening 133, respectively. At this time, the side surface of the first opening 33 on the stator 11 side and the end of the permanent magnet 32 are separated from each other, and a cavity is formed. This cavity is referred to as a first magnetic barrier 33a. Further, the end portion of the permanent magnet 32 is separated from the side surface of the first opening 33 on the rotor shaft 17 side, which will be described later, and a cavity is formed. This cavity is referred to as a second magnetic barrier 33b. The second opening 133 is provided so as to be symmetric with respect to the first opening 33 about the d axis as a central axis. Similar to the first opening 33, the second opening 133 has a first magnetic barrier 133a and a second magnetic barrier 133b. The third opening 233 is provided in a substantially triangular shape between the first opening 33 and the second opening 133 and on the stator 11 side. In order to maintain mechanical strength, a bridge portion 20 is formed between the second magnetic barrier 33b and the second magnetic barrier 133b. Similarly, the outer peripheral bridge portion 10 is also formed between the first magnetic barrier 33 a and the outer peripheral side surface of the rotor 16.

なお、第１の実施形態の一例を示すこの図面においては、６極モータの１極あたりに２個の永久磁石をＶ字状に配置した構成を例として説明したが、この形状に限るものではない。すなわち極数は４極や８極でもよく、１極あたりの永久磁石数も１個、もしくは３個以上でもよい。永久磁石の配置もＵ字や磁石を横向きに寝かせた配置でもよい。 In the drawing showing an example of the first embodiment, a configuration in which two permanent magnets are arranged in a V shape per pole of a 6-pole motor has been described as an example. However, the configuration is not limited to this shape. Absent. That is, the number of poles may be 4 or 8, and the number of permanent magnets per pole may be 1 or 3 or more. The arrangement of the permanent magnets may be an arrangement in which U-shaped or magnets are laid sideways.

回転子１６の内周側には回転子シャフト１７が設けられる。回転子シャフト１７はここでは図示しないコロ軸や玉軸などを有する軸受によって回転自在に支持されている。 A rotor shaft 17 is provided on the inner peripheral side of the rotor 16. The rotor shaft 17 is rotatably supported by a bearing having a roller shaft, a ball shaft, or the like (not shown).

このような構成の永久磁石式回転電機の固定子１１の電機子巻線１５には、３相交流電流が流れることによって回転磁界が発生する。発生した回転磁界によって、回転子１６が吸引され、回転子シャフト１７を中心に回転する。   A rotating magnetic field is generated in the armature winding 15 of the stator 11 of the permanent magnet type rotating electric machine having such a configuration by flowing a three-phase alternating current. The rotor 16 is attracted by the generated rotating magnetic field and rotates around the rotor shaft 17.

図２は、図１の永久磁石３２および永久磁石１３２を拡大した図である。図２を用いて磁石形状の特徴について詳細に説明する。図１及び図２の回転子１６の第１開口部３３が構成されており、その穴の中に多角形の永久磁石３２が配置されている。第１開口部３３は回転時の遠心力による応力を低減するために、磁石長辺に平行な第１直線部３１ａと、第１直線部３１ａの一端と繋がる第１短円弧部３５ａと、第１短円弧部３５ａの一端と繋がる、磁石短辺に対抗する第２直線部３４ａと、第２直線部３４ａの一端と繋がる第１長円弧部３５ｂと、第１長円弧部３５ｂと繋がる第３直線部３１ｂと、第３直線部３１ｂと繋がる第２長円弧部３５ｃと、繋がる第２長円弧部３５ｃと繋がる第４直線部３４ｂ、第４直線部３４ｂと繋がる第２短円弧部３５ｄと、を組み合わせた略楕円状の形状をしている。このとき、第１短円弧部３５ａと第２短円弧部３５ｄは、第１長円弧部３５ｂと第２長円弧部３５ｃよりも短い。   FIG. 2 is an enlarged view of the permanent magnet 32 and the permanent magnet 132 of FIG. The feature of the magnet shape will be described in detail with reference to FIG. A first opening 33 of the rotor 16 of FIGS. 1 and 2 is formed, and a polygonal permanent magnet 32 is disposed in the hole. In order to reduce the stress due to centrifugal force during rotation, the first opening 33 has a first straight arc portion 31a parallel to the long side of the magnet, a first short arc portion 35a connected to one end of the first straight portion 31a, A third straight line 34a connected to one end of the first short circular arc part 35a, a second straight line part 34a facing the short side of the magnet, a first long circular arc part 35b connected to one end of the second straight line part 34a, and a third long circular arc part 35b. A straight portion 31b, a second long arc portion 35c connected to the third straight portion 31b, a fourth straight portion 34b connected to the second long arc portion 35c connected, a second short arc portion 35d connected to the fourth straight portion 34b, It has a substantially elliptical shape. At this time, the first short arc portion 35a and the second short arc portion 35d are shorter than the first long arc portion 35b and the second long arc portion 35c.

第２直線部３４ａ及び第４直線部３４ｂは、１．５〜２．５ ｍｍ程度である。これは、第１開口部３３の固定子１１側の端部から回転子１６の外周部までの直線距離である外周部ブリッジ１０の幅と同程度である、第１開口部３３に挿入する永久磁石３２は、加工が容易な直線加工を組み合わせて両端部を多角形状としている。 The 2nd linear part 34a and the 4th linear part 34b are about 1.5-2.5 mm. This is the same as the width of the outer peripheral bridge 10, which is a linear distance from the end of the first opening 33 on the stator 11 side to the outer peripheral portion of the rotor 16, and is permanently inserted into the first opening 33. The magnet 32 is formed in a polygonal shape at both ends by combining linear processing that is easy to process.

またこのとき、第１開口部３３の第１直線部３１ａ、第３直線部３１ｂ及び、第２直線部３４ａ、第４直線部３４ｂに永久磁石３２の表面が接するように、永久磁石３２を形成し、配置する。第１直線部３１ａ、第３直線部３１ｂのそれぞれ接している永久磁石３２の２つ辺を長辺側端部とし、２つの長辺側端部をつなぐ辺を短辺側端部とする。このとき、短辺側端部が１つ以上の角を有している場合に、短辺側端部が多角形状であるとする。 At this time, the permanent magnet 32 is formed so that the surface of the permanent magnet 32 is in contact with the first straight portion 31a, the third straight portion 31b, the second straight portion 34a, and the fourth straight portion 34b of the first opening 33. And place. The two sides of the permanent magnet 32 in contact with each of the first linear portion 31a and the third linear portion 31b are the long side end portions, and the side connecting the two long side end portions is the short side end portion. At this time, when the short side end portion has one or more corners, the short side end portion is assumed to be polygonal.

なお、本実施形態の説明では、両端部を多角形状とした永久磁石３２を使用しているが、それに限ったものではない。図３（ａ）に示すように、第１開口部３３の第４直線部３４ｂに接する永久磁石３２の端面のみを多角形状とした永久磁石３７を用いることも可能である。また図３（ｂ）に示すように、第１開口部３３の第２直線部３４ａに接する永久磁石３２の端面のみを多角形状とした永久磁石３８を用いることも可能である。 In the description of the present embodiment, the permanent magnet 32 having polygonal shapes at both ends is used, but the present invention is not limited to this. As shown in FIG. 3A, it is also possible to use a permanent magnet 37 in which only the end surface of the permanent magnet 32 in contact with the fourth linear portion 34b of the first opening 33 is polygonal. Further, as shown in FIG. 3B, it is also possible to use a permanent magnet 38 in which only the end surface of the permanent magnet 32 in contact with the second linear portion 34a of the first opening 33 is polygonal.

次に、前述した実施形態の特性について説明する。図４に示す構成のように、直線部３１ａ、３１ｂ、３４ａ、３４ｂ、円弧部３５ａ、３５ｂ、３５ｃ、３５ｄから構成された第１開口部３３に対して、長辺に対して垂直な磁化４４をもつ矩形状の永久磁石３６を挿入した永久磁石式回転電機においては、永久磁石３６から発生する磁束のほとんどが永久磁石３６の長辺（直線部３１ａ、３１ｂ）に対して垂直方向に流れるため、外周部ブリッジ部１０や内周部ブリッジ部２０に流れ込む磁束が少ない。したがって、外周部ブリッジ部１０や内周部ブリッジ部２０における磁気飽和は小さく、外周部ブリッジ部１０や内周部ブリッジ部２０を通じて漏れ磁束が流れやすい状態となる。一方で、本実施形態においては、図５に示すように第２直線部３４ａや第４直線部３４ｂに接するように、端部を多角形状に加工した永久磁石３２を使用している。端部が多角形状の永久磁石３２から生じた磁束の一部は永久磁石３２に接する第２直線部３４ａや第４直線部３４ｂを通してブリッジ部１０に流れる磁束６１０やブリッジ部２０に流れる磁束６２０となる。これらの磁束によって、外周部ブリッジ部１０や内周部ブリッジ部２０が大きく磁気飽和して磁気抵抗が大きくなり、各ブリッジ部を流れる漏れ磁束を低減することができる。   Next, the characteristics of the above-described embodiment will be described. As in the configuration shown in FIG. 4, the magnetization 44 perpendicular to the long side with respect to the first opening 33 constituted by the straight portions 31 a, 31 b, 34 a, 34 b and the arc portions 35 a, 35 b, 35 c, 35 d. In a permanent magnet type rotating electrical machine in which a rectangular permanent magnet 36 having a gap is inserted, most of the magnetic flux generated from the permanent magnet 36 flows in a direction perpendicular to the long sides (straight portions 31a, 31b) of the permanent magnet 36. The magnetic flux flowing into the outer peripheral bridge portion 10 and the inner peripheral bridge portion 20 is small. Therefore, the magnetic saturation in the outer peripheral bridge portion 10 and the inner peripheral bridge portion 20 is small, and a leakage magnetic flux easily flows through the outer peripheral bridge portion 10 and the inner peripheral bridge portion 20. On the other hand, in this embodiment, as shown in FIG. 5, the permanent magnet 32 whose end portion is processed into a polygonal shape is used so as to contact the second straight portion 34 a and the fourth straight portion 34 b. A part of the magnetic flux generated from the permanent magnet 32 having a polygonal end portion is a magnetic flux 610 that flows to the bridge portion 10 through the second linear portion 34 a and the fourth linear portion 34 b that are in contact with the permanent magnet 32, and a magnetic flux 620 that flows to the bridge portion 20. Become. By these magnetic fluxes, the outer peripheral bridge portion 10 and the inner peripheral bridge portion 20 are greatly magnetically saturated to increase the magnetic resistance, and the leakage magnetic flux flowing through each bridge portion can be reduced.

上述したように矩形状の永久磁石３６を使用した場合永久磁石式回転電機の速度−トルク特性を、図６の特性７１に示す。それに対して、両端部を多角形状とした永久磁石３２を使用した場合の速度−トルク特性を特性７２、直線部３４ａに接する端面を多角形状にした永久磁石３８を使用した場合の速度−トルク特性を特性７３、直線部３４ｂに接する端面を多角形状とした永久磁石３７を使用した場合の速度−トルク特性を特性７４に示す。このように、永久磁石の両端部もしくはいずれか一方の端部を多角形状とすることにより、漏れ磁束が低減され、トルク特性が向上する。 As described above, when the rectangular permanent magnet 36 is used, the speed-torque characteristic of the permanent magnet type rotating electric machine is shown as a characteristic 71 in FIG. On the other hand, the speed-torque characteristic when the permanent magnet 32 having polygonal shapes at both ends is used is the characteristic 72, and the speed-torque characteristic when the permanent magnet 38 having a polygonal end surface in contact with the linear portion 34a is used. Is a characteristic 73, and a speed-torque characteristic is shown in a characteristic 74 when a permanent magnet 37 having a polygonal end surface in contact with the linear portion 34b is used. Thus, by making the both ends or one of the ends of the permanent magnet into a polygonal shape, the leakage magnetic flux is reduced and the torque characteristics are improved.

本実施形態によれば、回転子の開口部３３の直線部３４ａや３４ｂに接するように、端部を多角形状に加工した永久磁石３２、３７、もしくは３８を配置することによって、外周部ブリッジ部１０や内周部ブリッジ部２０を効果的に磁気飽和させて漏れ磁束を低減することにより、永久磁石式回転電機の高トルク密度化を実現することができる。   According to the present embodiment, by arranging the permanent magnets 32, 37, or 38 whose ends are processed into polygonal shapes so as to contact the straight portions 34a and 34b of the opening 33 of the rotor, the outer peripheral bridge portion 10 and the inner peripheral bridge portion 20 can be effectively magnetically saturated to reduce the leakage magnetic flux, thereby realizing a high torque density of the permanent magnet type rotating electrical machine.

（第２の実施形態）
第２の実施形態について図を参照し、詳細に説明する。全体図は第１の実施形態の永久磁石式回転電機と同様であるため図１を参照されたい。本実施形態は、第１の実施形態と比較して、永久磁石の磁化方向が異なっている。以下、その点について詳細に説明する。 (Second Embodiment)
The second embodiment will be described in detail with reference to the drawings. Since the overall view is the same as that of the permanent magnet type rotating electric machine of the first embodiment, refer to FIG. In the present embodiment, the magnetization direction of the permanent magnet is different from that in the first embodiment. Hereinafter, this point will be described in detail.

第２の実施形態においては、回転子の開口部３３の直線部３４ａや３４ｂに接するように、端部を多角形状に加工した永久磁石３２、３７、もしくは３８を搭載している。以下では、一例として永久磁石３２を用いた場合の図７を用いて説明する。この永久磁石３２は、磁石中央の矩形領域３２ａ、第２直線部３４ａに接する略台形領域３２ｃ、第４直線部３４ｂに接する略台形領域３２ｂの３部分の領域に分けられる。各領域において磁化方向が異なる。矩形領域３２ａでは長辺に垂直な磁化４４ａを持ち、略台形領域３２ｂ、３２ｃにおいては磁化４４ａの磁化方向に対して角度Ａだけ磁石の外側に傾いた磁化４４ｂ、４４ｃを有している。磁化４４ｂ、４４ｃの傾きＡは永久磁石略台形部３２ｂ、３２ｃの形状により値が決められるが、およそ０〜３０ｄｅｇ程度である。本構成においては、磁石の磁化方向が単一の場合に比べて、略台形領域４４ｂからブリッジ部１０、また略台形領域４４ｃからブリッジ部２０に磁束が流れやすくなり、ブリッジ部１０、および２０が磁気飽和し易くなる。これにより、ブリッジ部１０および２０の磁気抵抗が増加し、漏れ磁束が低減することによって高トルク密度化を実現することができる。   In the second embodiment, permanent magnets 32, 37, or 38 whose ends are processed into polygonal shapes are mounted so as to be in contact with the straight portions 34a and 34b of the opening 33 of the rotor. Below, it demonstrates using FIG. 7 at the time of using the permanent magnet 32 as an example. The permanent magnet 32 is divided into three regions: a rectangular region 32a at the center of the magnet, a substantially trapezoidal region 32c in contact with the second linear part 34a, and a substantially trapezoidal region 32b in contact with the fourth linear part 34b. The magnetization direction is different in each region. The rectangular region 32a has a magnetization 44a perpendicular to the long side, and the substantially trapezoidal regions 32b and 32c have magnetizations 44b and 44c that are inclined to the outside of the magnet by an angle A with respect to the magnetization direction of the magnetization 44a. The value of the inclination A of the magnetizations 44b and 44c is determined by the shape of the substantially trapezoidal portions 32b and 32c of the permanent magnet, but is about 0 to 30 degrees. In this configuration, the magnetic flux easily flows from the substantially trapezoidal region 44b to the bridge portion 10 and from the substantially trapezoidal region 44c to the bridge portion 20 as compared with the case where the magnetization direction of the magnet is single, and the bridge portions 10 and 20 are Magnetic saturation is likely to occur. As a result, the magnetic resistance of the bridge portions 10 and 20 is increased, and the leakage flux is reduced, so that a high torque density can be realized.

本実施形態によれば、永久磁石３２の端部の台形領域３２ｂ、３２ｃの磁化方向を磁石外側方向に傾け、磁化４４ｂ、４４ｃとすることにより、ブリッジ部１０と２０を効果的に磁気飽和させ、漏れ磁束を低減することによって、永久磁石式回転電機の高トルク密度化を実現することができる。   According to the present embodiment, the magnetization directions of the trapezoidal regions 32b and 32c at the end of the permanent magnet 32 are inclined toward the magnet outer direction to be the magnetizations 44b and 44c, thereby effectively magnetically saturating the bridge portions 10 and 20. By reducing the leakage magnetic flux, it is possible to realize a high torque density of the permanent magnet type rotating electric machine.

上記で説明された全ての実施形態は、例として提示したものであり、発明の範囲を限定するものではない。例えば、本実施形態は、永久磁石及び、その永久磁石を配置する開口部の配置がＶ字状に限定するものではなく、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、特許請求の範囲に記載された発明とその均等の範囲に含まれる。
All the embodiments described above are presented by way of example and do not limit the scope of the invention. For example, in the present embodiment, the arrangement of the permanent magnet and the opening for arranging the permanent magnet is not limited to a V shape, and can be implemented in various other forms. Various omissions, replacements, and changes can be made without departing from the scope of the present invention. These embodiments and modifications thereof are included in the scope of the invention described in the claims and equivalents thereof.

１０ 外周部ブリッジ
２０ 内周部ブリッジ
１１ 固定子
１２ 固定子ティース
１３ 固定子コアバック
１４ 固定子スロット
１５ 電機子巻線
１６ 回転子
１７ 回転子シャフト
３２ 両端部を多角形状とした永久磁石
３３ 第１開口部
３３ａ 第１磁気障壁
３３ｂ 第２磁気障壁
１３２ 永久磁石
１３３ 第２開口部
１３３ａ 第１磁気障壁
１３３ｂ 第２磁気障壁
２３３ 第３開口部
３１ａ 第１直線部
３１ｂ 第３直線部
３４ａ 第２直線部
３４ｂ 第４直線部
３５ａ 第１短円弧部
３５ｂ 第１長円弧部
３５ｃ 第２長円弧部
３５ｄ 第２短円弧部
３６ 矩形状永久磁石
３７ 第１開口部３３の第４直線部３４ｂに接する端面のみを多角形状とした永久磁石
３８ 第１開口部３３の第２直線部３４ａに接する端面のみを多角形状とした永久磁石
４４ 磁石長辺に対して垂直な磁化
６１０ 第２直線部３４ａや第４直線部３４ｂを通してブリッジ部１０に流れる磁束
６２０ 第２直線部３４ａや第４直線部３４ｂを通してブリッジ部２０に流れる磁束
７１ 矩形状の永久磁石３６を使用した場合永久磁石式回転電機の速度−トルク特性
７２ 両端部を多角形状とした永久磁石３２を使用した場合の速度−トルク特性
７３ 直線部３４ａに接する端面を多角形状にした永久磁石３８を使用した場合の速度−トルク特性
７４ 直線部３４ｂに接する端面を多角形状とした永久磁石３７を使用した場合の速度−トルク特性
３２ａ 磁石中央の矩形領域
３２ｂ 第４直線部３４ｂに接する略台形領域
３２ｃ 第２直線部３４ａに接する略台形領域
４４ａ 磁石長辺に対して垂直な磁化
４４ｂ 磁化４４ａの磁化方向に対して角度Ａだけ磁石の外側に傾いた磁化
４４ｃ 磁化４４ａの磁化方向に対して角度Ａだけ磁石の外側に傾いた磁化 DESCRIPTION OF SYMBOLS 10 Outer peripheral bridge 20 Inner peripheral bridge 11 Stator 12 Stator teeth 13 Stator core back 14 Stator slot 15 Armature winding 16 Rotor 17 Rotor shaft 32 Permanent magnet 33 having both ends polygonal Opening 33a First magnetic barrier 33b Second magnetic barrier 132 Permanent magnet 133 Second opening 133a First magnetic barrier 133b Second magnetic barrier 233 Third opening 31a First straight portion 31b Third straight portion 34a Second straight portion 34b 4th linear part 35a 1st short circular arc part 35b 1st long circular arc part 35c 2nd long circular arc part 35d 2nd short circular arc part 36 Rectangular permanent magnet 37 Only the end surface which contact | connects the 4th linear part 34b of the 1st opening part 33 Permanent magnet 38 having a polygonal shape Permanent magnet 44 having a polygonal shape only on the end surface in contact with the second straight portion 34a of the first opening 33 is perpendicular to the long side of the magnet. 610 Magnetic flux 620 flowing into the bridge portion 10 through the second straight portion 34a and the fourth straight portion 34b Magnetic flux 71 flowing into the bridge portion 20 through the second straight portion 34a and the fourth straight portion 34b When a rectangular permanent magnet 36 is used Speed-torque characteristic 72 of permanent magnet type rotating electrical machine Speed-torque characteristic 73 when using permanent magnet 32 having both ends of a polygonal shape When permanent magnet 38 having a polygonal end surface in contact with linear portion 34a is used. Speed-torque characteristics 74 Speed-torque characteristics when a permanent magnet 37 having a polygonal end surface in contact with the straight portion 34b is used Rectangular region 32b in the center of the magnet Substantially trapezoidal region 32c in contact with the fourth straight portion 34b Second straight portion A substantially trapezoidal region 44a in contact with 34a Magnetization 44b perpendicular to the long side of the magnet Outside the magnet by an angle A with respect to the magnetization direction of the magnetization 44a Magnetization 44c inclined to the side Magnetization inclined to the outside of the magnet by an angle A with respect to the magnetization direction of the magnetization 44a

Claims (6)

回転子内に直線部と円弧部とが接続されることで構成される開口部を有し、
前記開口部内には永久磁石が配置される永久磁石式回転電機。 Having an opening configured by connecting a linear portion and an arc portion in the rotor;
A permanent magnet type rotating electrical machine in which a permanent magnet is disposed in the opening. 前記永久磁石式回転電機の断面において、
前記永久磁石は２つの長辺側端部を接続する２つの短辺側は端部を有しており、
前記短辺側端部は、どちらか一方が多角形状であり、前記開口部の直線部と接する永久磁石式回転電機。 In the cross section of the permanent magnet type rotating electrical machine,
The permanent magnet has two end portions on the short side connecting the two end portions on the long side,
One of the short side end portions is a polygonal shape, and is a permanent magnet type rotating electrical machine that is in contact with the straight portion of the opening. 前記永久磁石の長辺側端部と前記開口部の直線部が接することで、ブリッジ部に積極的に磁束を流し、ブリッジ部を磁気飽和させる永久磁石式回転電機。   A permanent magnet type rotating electrical machine that causes a magnetic flux to actively flow through a bridge portion and magnetically saturate the bridge portion by contacting a long-side end portion of the permanent magnet and a linear portion of the opening. 前記永久磁石の長辺側端部と前記開口部の直線部が接することで、前記永久磁石の短辺側の多角形状の端部の磁化方向を、前記永久磁石の長辺側端部に垂直な方向から短辺側端部の方向へ傾けた永久磁石式回転電機。   When the long-side end of the permanent magnet is in contact with the linear portion of the opening, the magnetization direction of the polygonal end on the short-side of the permanent magnet is perpendicular to the long-side end of the permanent magnet. Permanent magnet type rotating electrical machine tilted from one direction to the direction of the short side end. 前記永久磁石の長辺側端部と前記開口部の直線部が接することで、ブリッジ部に積極的に磁束を流し、ブリッジ部を磁気飽和させる永久磁石式回転電機。   A permanent magnet type rotating electrical machine that causes a magnetic flux to actively flow through a bridge portion and magnetically saturate the bridge portion by contacting a long-side end portion of the permanent magnet and a linear portion of the opening. 前記永久磁石の長辺側端部と前記開口部の直線部が接することで、前記永久磁石の短辺側の多角形状の端部の磁化方向を、前記永久磁石の長辺側端部に垂直な方向から短辺側端部の方向へ傾けた永久磁石式回転電機。   When the long-side end of the permanent magnet is in contact with the linear portion of the opening, the magnetization direction of the polygonal end on the short-side of the permanent magnet is perpendicular to the long-side end of the permanent magnet. Permanent magnet type rotating electrical machine tilted from one direction to the direction of the short side end.
JP2013205873A 2013-09-30 2013-09-30 Permanent magnet type electric rotating machine Pending JP2015070768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013205873A JP2015070768A (en) 2013-09-30 2013-09-30 Permanent magnet type electric rotating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013205873A JP2015070768A (en) 2013-09-30 2013-09-30 Permanent magnet type electric rotating machine

Publications (1)

Publication Number Publication Date
JP2015070768A true JP2015070768A (en) 2015-04-13

Family

ID=52836947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013205873A Pending JP2015070768A (en) 2013-09-30 2013-09-30 Permanent magnet type electric rotating machine

Country Status (1)

Country Link
JP (1) JP2015070768A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017216846A (en) * 2016-06-02 2017-12-07 株式会社明電舎 Permanent magnet type rotary electric machine
KR102126315B1 (en) * 2019-06-28 2020-06-24 엘지전자 주식회사 Electric motor, compressor with electric motor and air conditioner having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017216846A (en) * 2016-06-02 2017-12-07 株式会社明電舎 Permanent magnet type rotary electric machine
KR102126315B1 (en) * 2019-06-28 2020-06-24 엘지전자 주식회사 Electric motor, compressor with electric motor and air conditioner having the same

Similar Documents

Publication Publication Date Title
CN108075585B (en) Rotating electrical machine
JP6879140B2 (en) Rotating machine
US11431213B2 (en) Rotary electric machine
JP5757281B2 (en) Rotating electrical machine rotor
US9172279B2 (en) Automotive embedded permanent magnet rotary electric machine
CN109565198B (en) Rotor and reluctance motor
US9077224B2 (en) Rotor core, rotor, and rotating electric machine
JP5472200B2 (en) Rotating electrical machine rotor
JP4900132B2 (en) Rotor and rotating electric machine
US9893577B2 (en) Motor including permanent magnet rotor with flux barrier
JP2012100498A (en) Stator core
JP7076188B2 (en) Variable magnetic force motor
JP2009131070A (en) Magnet type synchronous machine
KR20130093040A (en) Rotary electric machine
JP2017050965A (en) Rotor structure for rotary electric machine
JP4574297B2 (en) Rotating electrical machine rotor
JPWO2021131071A1 (en) Hybrid field double gap synchronizer and drive system
JP2020120444A (en) Rotor of rotary electric machine and rotary electric machine
JP4580683B2 (en) Permanent magnet type reluctance type rotating electrical machine
KR20130093039A (en) Rotary electric machine
JP2009044893A (en) Rotor and rotary electric machine
JP2013132124A (en) Core for field element
JP6507956B2 (en) Permanent magnet type rotating electric machine
JPWO2020194390A1 (en) Rotating machine
JP5310790B2 (en) Rotating electrical machine rotor

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20150216

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20150218