JP2019135890A - Outer rotation type permanent magnet rotary electric machine - Google Patents

Outer rotation type permanent magnet rotary electric machine Download PDF

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JP2019135890A
JP2019135890A JP2018017962A JP2018017962A JP2019135890A JP 2019135890 A JP2019135890 A JP 2019135890A JP 2018017962 A JP2018017962 A JP 2018017962A JP 2018017962 A JP2018017962 A JP 2018017962A JP 2019135890 A JP2019135890 A JP 2019135890A
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permanent magnet
gap
type permanent
rotor
electrical machine
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JP7027187B2 (en
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雅寛 堀
Masahiro Hori
雅寛 堀
三好　努
Tsutomu Miyoshi
努 三好
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

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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)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

To provide an outer rotation type permanent magnet rotary electric machine which reduces a loss generated in a magnet while suppressing cost.SOLUTION: An outer rotation type permanent magnet rotary electric machine comprises: a rotor formed from a rotor core 2 and a permanent magnet 3 which is disposed at an inner diameter side of the rotor core; and a stator formed from a stator core 5 disposed at an inner diameter side of the rotor while interposing a clearance therebetween, and coils 6 disposed in multiple slots provided in the stator core. In the outer rotation type permanent magnet rotary electric machine, the rotor core includes a groove 9 as one example of a cavity at a position where the permanent magnet is disposed.SELECTED DRAWING: Figure 2

Description

本発明は、外転型回転電機に関するものであり、特に、外移転型永久磁石回転電機に関するものである。   The present invention relates to an outer rotation type rotary electric machine, and more particularly to an outer transfer type permanent magnet rotary electric machine.

外転型永久磁石回転電機は、コイルを取り付けた固定子の外周側に、永久磁石を取り付けた回転子を配置した構成である。外転型永久磁石回転電機は、内転型永久磁石回転電機に比べ、回転子−固定子間間隙（ギャップ）の半径が大きくなり、回転子が外側にあるため１極分の周長が長くなることから、ギャップから見て面積の大きな磁石を配置できるという特徴がある。これにより、高出力化でき、回転電機の小型化が可能となる。   The abduction-type permanent magnet rotating electrical machine has a configuration in which a rotor with a permanent magnet is arranged on the outer peripheral side of a stator with a coil attached. The outer rotation type permanent magnet rotating electrical machine has a larger rotor-stator gap (gap) radius than the inner rotating type permanent magnet rotating electrical machine, and the outer circumference of the rotor is longer than that of one pole. Therefore, a magnet having a large area when viewed from the gap can be arranged. Thereby, it is possible to increase the output and to reduce the size of the rotating electrical machine.

しかしながら、ギャップに面して磁石を配置した表面磁石型は、磁石がギャップ近傍にあるため、ギャップの高調波磁束の影響を受けやすく、磁石の渦電流損が増加する課題がある。磁石の渦電流損により磁石温度が増加すると、磁石が熱減磁し、回転電機の性能が低下する可能性がある。   However, the surface magnet type in which the magnet is arranged facing the gap has a problem in that the magnet is near the gap and thus is easily affected by the harmonic magnetic flux of the gap, and the eddy current loss of the magnet increases. When the magnet temperature increases due to the eddy current loss of the magnet, the magnet is thermally demagnetized, which may reduce the performance of the rotating electrical machine.

磁石の渦電流損低減に関して、例えば、特許文献１に記載された技術がある。特許文献１では、空隙を隔てて、固定子の内周側に配置した回転子の鉄心に、各磁極に対応する複数の永久磁石を周方向に配置した永久磁石式回転電機であって、前記永久磁石を、磁気特性が異なる複数の同一形状になる磁石素片の集合体で構成したことを特徴としている。この構成により、磁石を分割することで、磁石の渦電流損を低減することができる。   For reducing eddy current loss of a magnet, for example, there is a technique described in Patent Document 1. In Patent Document 1, a permanent magnet type rotating electrical machine in which a plurality of permanent magnets corresponding to each magnetic pole are arranged in the circumferential direction on the iron core of the rotor arranged on the inner circumference side of the stator with a gap therebetween, The permanent magnet is constituted by an assembly of a plurality of magnet pieces having the same shape and different magnetic characteristics. With this configuration, the eddy current loss of the magnet can be reduced by dividing the magnet.

特開２０１４−３３５８２号公報JP 2014-33582 A

特許文献１では、磁石を細分化しているため、磁石挿入や磁石接着の作業が増加するため、コストが増加する可能性がある。そこで、永久磁石を分割して配置するといった永久磁石の構成を変更することなく、コストを抑えることが望まれる。   In Patent Document 1, since the magnets are subdivided, the operations of magnet insertion and magnet bonding increase, which may increase the cost. Therefore, it is desired to reduce the cost without changing the configuration of the permanent magnet, such as dividing the permanent magnet.

本発明の目的は、コストを抑えて磁石に発生する損失を低減する外転型永久磁石回転電機を提供することにある。   An object of the present invention is to provide an abduction type permanent magnet rotating electrical machine that reduces costs and reduces loss generated in a magnet.

本発明の好ましい一例は、回転子コアと、前記回転子コアの内径側に配置された永久磁石とにより形成される回転子と、前記回転子の内径側に間隙を介して配置される固定子コアと、前記固定子コアに設けられた複数個のスロット内に配置されたコイルとより形成される固定子とを有する外転型永久磁石回転電機であって、前記回転子コアは、前記永久磁石が配置された位置に空隙を有する外転型永久磁石回転電機である。   A preferred example of the present invention is a rotor formed by a rotor core, a permanent magnet disposed on the inner diameter side of the rotor core, and a stator disposed on the inner diameter side of the rotor via a gap. An abduction-type permanent magnet rotating electrical machine having a core and a stator formed by coils disposed in a plurality of slots provided in the stator core, wherein the rotor core is the permanent magnet This is an abduction type permanent magnet rotating electric machine having a gap at a position where a magnet is arranged.

本発明によれば、コストを抑えて磁石に発生する損失を低減する外転型永久磁石回転電機を得ることができる。   ADVANTAGE OF THE INVENTION According to this invention, the outer rotation type permanent magnet rotary electric machine which suppresses cost and reduces the loss which generate | occur | produces in a magnet can be obtained.

実施例１の外転型永久磁石回転電機の径方向の構成を示す図である。It is a figure which shows the structure of the radial direction of the external rotation type permanent magnet rotary electric machine of Example 1. FIG. 実施例１の溝付近を拡大した径方向の構成を示す図である。It is a figure which shows the structure of the radial direction which expanded the groove vicinity of Example 1. FIG. 実施例１の高調波磁束の流れの模擬図である。FIG. 3 is a simulation diagram of a flow of harmonic magnetic flux according to the first embodiment. 実施例１の溝による効果を示した図である。It is the figure which showed the effect by the groove | channel of Example 1. FIG. 実施例１の半円形状溝付近を拡大した径方向の構成を示す図である。It is a figure which shows the structure of the radial direction which expanded the semicircle-shaped groove vicinity of Example 1. FIG. 実施例１の三角溝付近を拡大した径方向の構成を示す図である。It is a figure which shows the structure of the radial direction which expanded the triangular groove vicinity of Example 1. FIG. 実施例１の溝の幅に対する損失を示した図である。It is the figure which showed the loss with respect to the width | variety of the groove | channel of Example 1. FIG. 実施例２の空隙付近を拡大した径方向の構成を示す図である。It is a figure which shows the structure of the radial direction which expanded the space | gap vicinity of Example 2. FIG. 実施例２の空隙の位置に対する損失を示した図である。It is the figure which showed the loss with respect to the position of the space | gap of Example 2. FIG. 実施例３の外転型永久磁石回転電機を採用したエレベータ用巻上機の軸方向の構成を示す図である。It is a figure which shows the structure of the axial direction of the winding machine for elevators which employ | adopted the external rotation type permanent magnet rotary electric machine of Example 3. FIG.

以下、図面に基づいて、外転型永久磁石回転電機の実施例を説明する。   Hereinafter, an embodiment of an outer rotation type permanent magnet rotating electric machine will be described based on the drawings.

図１に、転型永久磁石回転電機の実施例１を示す。図１は、永久磁石回転電機の径方向（回転子の直径を示す方向）の構成を示す図である。本実施例の外転型永久磁石回転電機１は、回転軸（図示せず）を中心に円環状に形成された回転子コア２と永久磁石３により構成された回転子４と、回転子４の内径側に所定の間隙を設けて配置され、固定子コア５とコイル６により構成された、円環状に形成された固定子７を備える。ここで、永久磁石３は、回転子コア２の表面に配置される表面磁石型とすることが望ましい。また、内径側とは、回転子などの直径上にあり回転子の回転軸方向への向きをいい、その反対方向を外径側と呼ぶ。   FIG. 1 shows a first embodiment of a rotary permanent magnet rotating electrical machine. FIG. 1 is a diagram illustrating a configuration of a permanent magnet rotating electrical machine in a radial direction (a direction indicating a diameter of a rotor). An outer rotation type permanent magnet rotating electrical machine 1 according to the present embodiment includes a rotor core 2 formed in an annular shape around a rotation shaft (not shown) and a rotor 4 composed of a permanent magnet 3, and the rotor 4. Is provided with a predetermined gap on the inner diameter side, and includes a stator 7 formed of a stator core 5 and a coil 6 and formed in an annular shape. Here, the permanent magnet 3 is desirably a surface magnet type disposed on the surface of the rotor core 2. The inner diameter side is on the diameter of the rotor or the like and refers to the direction of the rotor in the direction of the rotation axis, and the opposite direction is referred to as the outer diameter side.

これにより、永久磁石３を回転子コア２の表面に配置することにより回転子内で磁石磁束が短絡する漏れ磁束を低減でき、有効磁束が増加するため、高出力化できる。また、コイル６は、集中巻により固定子コア５に取り付けられることが望ましい。これにより、コイル６の軸方向短部の長さが短くなり、外転型永久磁石回転電機１の軸方向長さが短くなり、小型化できる。   As a result, by disposing the permanent magnet 3 on the surface of the rotor core 2, the leakage magnetic flux that causes the magnet magnetic flux to be short-circuited in the rotor can be reduced, and the effective magnetic flux is increased, so that the output can be increased. The coil 6 is preferably attached to the stator core 5 by concentrated winding. As a result, the length of the short portion in the axial direction of the coil 6 is shortened, and the length in the axial direction of the abduction-type permanent magnet rotating electrical machine 1 is shortened.

さらに、固定子コア５のコイル６が配置される部分（スロット8）はオープンスロットとすることが望ましい。これにより、コイル６の挿入が容易となり、組み立て性が向上する。さらに、固定子コア５の間隙付近（ティース先端）は、固定子７から回転子４の方向に突き出た形状である。ティース先端は、固定子コア５の半径より小さな曲率半径を持たせることが望ましい。これにより、周方向（回転子コア２または固定子コア５の円周方向を示す）の磁気抵抗の変化率が低減でき、トルク脈動が低減できる。   Furthermore, it is desirable that the portion (slot 8) where the coil 6 of the stator core 5 is disposed is an open slot. Thereby, insertion of the coil 6 becomes easy and assemblability improves. Further, the vicinity of the gap (tooth tip) of the stator core 5 has a shape protruding from the stator 7 toward the rotor 4. It is desirable that the tooth tip has a radius of curvature smaller than the radius of the stator core 5. Thereby, the change rate of the magnetic resistance in the circumferential direction (indicating the circumferential direction of the rotor core 2 or the stator core 5) can be reduced, and torque pulsation can be reduced.

ここで、回転子コア２の永久磁石３の幅方向（回転子コア２内側の周方向）中央に対応する位置に、永久磁石３の方に開口部を有する開空間部としての溝９を設けている。図２に、空隙の一例としての溝９の付近の拡大図を示す。図３を用いて溝９による効果を説明する。図３の矢印は、磁束の高調波成分を示している。通常は、固定子７から永久磁石３に対し、垂直に磁束の高調波成分が鎖交するが、溝９を設けることで、溝９が磁気抵抗となり、溝９に対して左右に分かれて磁石に磁束の高調波成分が鎖交する。   Here, in the position corresponding to the center of the width direction of the permanent magnet 3 of the rotor core 2 (circumferential direction inside the rotor core 2), a groove 9 is provided as an open space portion having an opening on the permanent magnet 3 side. ing. FIG. 2 shows an enlarged view of the vicinity of the groove 9 as an example of the gap. The effect of the groove 9 will be described with reference to FIG. The arrow of FIG. 3 has shown the harmonic component of magnetic flux. Normally, the harmonic component of the magnetic flux is linked vertically from the stator 7 to the permanent magnet 3, but by providing the groove 9, the groove 9 becomes a magnetic resistance, and the magnet is divided into left and right with respect to the groove 9. The harmonic components of the magnetic flux are interlinked.

これにより、磁束の高調波の磁石幅方向（回転子コア２の周方向）の成分がキャンセルされ、永久磁石３に鎖交する高調波成分が低減し、渦電流を低減できる。さらに、溝９が磁気抵抗となるため、インダクタンスが低下することで、駆動時のモータ電源電圧を低減できる。通常、永久磁石回転電機は、インバータにより駆動するため、駆動時の電圧に上限があり、設計制約となる。   Thereby, the component of the harmonic of the magnetic flux in the magnet width direction (circumferential direction of the rotor core 2) is canceled, the harmonic component interlinked with the permanent magnet 3 is reduced, and the eddy current can be reduced. Furthermore, since the groove 9 becomes a magnetic resistance, the inductance decreases, so that the motor power supply voltage during driving can be reduced. Usually, since a permanent magnet rotating electrical machine is driven by an inverter, there is an upper limit in the voltage during driving, which is a design constraint.

そのため、駆動時のモータ電源電圧を低減することで、設計自由度が増加し、モータを高性能化できる可能性がある。加えて、溝９により、回転子４と固定子７との間の間隙の周方向の磁気抵抗の変化率が低減でき、トルク脈動を低減できる。   Therefore, by reducing the motor power supply voltage at the time of driving, there is a possibility that the degree of freedom of design increases and the performance of the motor can be improved. In addition, the groove 9 can reduce the rate of change in the magnetic resistance in the circumferential direction of the gap between the rotor 4 and the stator 7 and can reduce torque pulsation.

次に、溝９の形状を比較する。図４に、溝形状として、台形、長方形、逆台形とした場合における回転電機の損失合計（銅損＋鉄損＋磁石渦電流損）と駆動時の電圧の比較を示す。図４から、溝９は、台形とした場合が、最も損失低減効果と電圧低減効果が大きくなる。よって、溝９は、台形形状とすることが望ましい。また、台形形状に近い、図５の半円形状の溝１０や、図６の三角形状の溝１１でも有効な効果が得られる。   Next, the shapes of the grooves 9 are compared. FIG. 4 shows a comparison between the total loss (copper loss + iron loss + magnet eddy current loss) of the rotating electrical machine and the voltage during driving when the groove shape is trapezoidal, rectangular, or inverted trapezoidal. From FIG. 4, when the groove 9 is trapezoidal, the loss reduction effect and the voltage reduction effect are maximized. Therefore, the groove 9 is preferably trapezoidal. Further, an effective effect can be obtained with the semicircular groove 10 shown in FIG. 5 or the triangular groove 11 shown in FIG.

続いて、溝９の大きさを比較する。図７に永久磁石３と溝９の幅の割合に対する損失合計を示す。図７から、溝幅/磁石幅=0.25[p.u.]付近で最も損失合計が小さくなる。また、溝幅/磁石幅＞0.40[p.u.]となると、溝９がない場合より、損失合計が明らかに大きくなる。よって、溝幅/磁石幅≦0.40[p.u.]とすることが望ましい。さらに、溝幅/磁石幅は、0.10[p.u]以上とすることが望ましい。   Subsequently, the sizes of the grooves 9 are compared. FIG. 7 shows the total loss with respect to the ratio of the width of the permanent magnet 3 and the groove 9. From FIG. 7, the total loss becomes the smallest in the vicinity of groove width / magnet width = 0.25 [p.u.]. Further, when the groove width / magnet width> 0.40 [p.u.], the total loss is clearly increased as compared with the case where the groove 9 is not provided. Therefore, it is desirable that groove width / magnet width ≦ 0.40 [p.u.]. Furthermore, the groove width / magnet width is desirably 0.10 [p.u] or more.

なお、図１は、40極48スロットの外転型永久磁石回転電機を示したが、この形状に限定するものではなく、他のスロットコンビネーションでも同様の効果を得られる。また、外転型回転電機が両回転する場合には、溝形状は、中心軸に対し対称であることが望ましい。   Although FIG. 1 shows a 40 pole 48 slot external rotating permanent magnet rotating electrical machine, the present invention is not limited to this shape, and the same effect can be obtained with other slot combinations. Further, when the abduction type rotating electrical machine rotates in both directions, the groove shape is preferably symmetric with respect to the central axis.

図８に、実施例２の外転型永久磁石回転電機１を示す。実施例１では、回転子コア２に溝９を設けたが、図８ように、永久磁石３の付近に空隙の一例として、回転子コア２内に閉じた空間部１２を設けた形状としてもよい。溝９を設けた場合、回転子コア２と永久磁石３と接触面積が低下するため、永久磁石３の固定が困難になる可能性がある。   FIG. 8 shows an outer rotation type permanent magnet rotating electrical machine 1 according to the second embodiment. In the first embodiment, the groove 9 is provided in the rotor core 2. However, as illustrated in FIG. 8, as an example of the gap in the vicinity of the permanent magnet 3, the closed space portion 12 may be provided in the rotor core 2. Good. When the groove 9 is provided, the contact area between the rotor core 2 and the permanent magnet 3 is reduced, so that it may be difficult to fix the permanent magnet 3.

また、溝９により、永久磁石３のパーミアンスが低下し、磁石の減磁耐力が低下する可能性がある。閉じた空間部１２を設けた場合は、これら固定の強さやパーミアンスについての問題は少なくなる。しかし、溝９に比べ、閉じた空間部１２の方が、製作が困難になる可能性がある。しかし、鋼板である回転子コア２を、打ち抜きにより成型する場合では、問題にならない。打ち抜いた回転子コア２を複数重ねて回転子コア２を作成する。   Further, the groove 9 may reduce the permeance of the permanent magnet 3 and reduce the demagnetization resistance of the magnet. When the closed space portion 12 is provided, there are fewer problems with the fixing strength and permeance. However, the closed space 12 may be more difficult to manufacture than the groove 9. However, there is no problem when the rotor core 2 which is a steel plate is formed by punching. A plurality of punched rotor cores 2 are stacked to create a rotor core 2.

閉じた空間部１２の位置を比較する。図９に、空隙位置に対する損失合計を示す。空隙位置は、永久磁石３の回転子コア２側の面から閉じた空間部１２の内径側の面までの距離をいう。図９から、空隙位置1.0[mm]〜1.5[mm]付近にて損失が最も小さくなる。また、空隙位置が、3.0[mm]より大きくなると空隙が無い場合より損失合計が大きくなる可能性がある。よって、空隙位置は3.0[mm]以下とすることが望ましい。なお、閉じた空間部１２の形状や大きさ等は、溝９と同様とすることが望ましい。さらに、空隙には空気が充填されている必要はなく、樹脂等の非磁性体でもよい。また、溝の形状のように、閉じた空間部１２の形状を、台形、長方形、逆台形、半円形としてもよい。   The positions of the closed spaces 12 are compared. FIG. 9 shows the total loss with respect to the gap position. The gap position refers to the distance from the surface on the rotor core 2 side of the permanent magnet 3 to the surface on the inner diameter side of the closed space portion 12. From FIG. 9, the loss becomes the smallest in the vicinity of the gap position of 1.0 [mm] to 1.5 [mm]. Further, when the gap position is larger than 3.0 [mm], the total loss may be larger than when there is no gap. Therefore, it is desirable that the gap position is 3.0 [mm] or less. The shape, size, etc. of the closed space 12 are preferably the same as those of the groove 9. Further, the gap need not be filled with air, and may be a non-magnetic material such as a resin. Moreover, it is good also considering the shape of the closed space part 12 like trapezoid shape as a trapezoid, a rectangle, an inverted trapezoid, and a semicircle.

図１０は、外転型回転電機をエレベータ用巻上機に、実施例の外転型永久磁石回転電機を適用した実施例３の構成例を示す。なお、図１０は、軸方向断面の1/2分のみ記載しており、回転部にはハッチングしている。図１０の下部に示した回転軸１６と回転子コア２と永久磁石３とは接続されており、回転軸が回転することで、回転子コア２と永久磁石３から構成された回転子４が固定子７に対して所定の間隙を隔てて回転する。図１０では溝９などの空隙は、省略した。   FIG. 10 shows a configuration example of the third embodiment in which the outer rotation type rotary electric machine is applied to the elevator hoisting machine and the outer rotation type permanent magnet rotary electric machine of the embodiment is applied. FIG. 10 shows only half of the axial cross section, and the rotating part is hatched. The rotating shaft 16, the rotor core 2, and the permanent magnet 3 shown in the lower part of FIG. 10 are connected, and the rotor 4 configured by the rotor core 2 and the permanent magnet 3 is rotated by rotating the rotating shaft. It rotates with a predetermined gap with respect to the stator 7. In FIG. 10, the gaps such as the grooves 9 are omitted.

図１０に示すように、エレベータ用巻上機は、外転型永久磁石回転電機１にエレベータ用巻上機のロープ１３を巻きつけるシーブ１４と、回転を機械的にとめるブレーキ１５が取り付けられ、かごに繋がるロープを巻き上げる。   As shown in FIG. 10, the elevator hoisting machine is provided with a sheave 14 for winding the rope 13 of the elevator hoisting machine around the abduction-type permanent magnet rotating electrical machine 1 and a brake 15 for mechanically stopping the rotation. Wind up the rope that leads to the basket.

このような本実施例によれば、上述した損失低下により冷却性能を向上させることで小型化した外転型永久磁石回転電機を用いているため、エレベータ用巻上機の軽量化が可能となり、設置にかかるコストを低減することができる。また、外転型永久磁石回転電機のトルク脈動を低減しているため、エレベータの乗り心地を改善できる。   According to the present embodiment, since the abduction-type permanent magnet rotating electrical machine that has been downsized by improving the cooling performance due to the above-described loss reduction, it is possible to reduce the weight of the elevator hoisting machine, Installation costs can be reduced. Moreover, since the torque pulsation of the outer rotation type permanent magnet rotating electric machine is reduced, the riding comfort of the elevator can be improved.

１…外転型永久磁石回転電機、２…回転子コア、３…永久磁石、４…回転子、５…固定子コア、６…コイル、７…固定子、８…スロット、９…溝、１２…閉じた空間部、１３…ロープ、１４…シーブ、１５…ブレーキ。   DESCRIPTION OF SYMBOLS 1 ... External rotation type permanent magnet rotary electric machine, 2 ... Rotor core, 3 ... Permanent magnet, 4 ... Rotor, 5 ... Stator core, 6 ... Coil, 7 ... Stator, 8 ... Slot, 9 ... Groove, 12 ... closed space, 13 ... rope, 14 ... sheave, 15 ... brake.

Claims (10)

回転子コアと、前記回転子コアの内径側に配置された永久磁石とにより形成される回転子と、
前記回転子の内径側に間隙を介して配置される固定子コアと、前記固定子コアに設けられた複数個のスロット内に配置されたコイルとより形成される固定子とを有する外転型永久磁石回転電機であって、
前記回転子コアは、前記永久磁石が配置された位置に空隙を有することを特徴とする外転型永久磁石回転電機。 A rotor formed by a rotor core and a permanent magnet disposed on the inner diameter side of the rotor core;
An abduction die having a stator core that is disposed on the inner diameter side of the rotor via a gap, and a stator that is formed by coils disposed in a plurality of slots provided in the stator core. A permanent magnet rotating electrical machine,
The rotor core has a gap at a position where the permanent magnet is disposed. 請求項１に記載の外転型永久磁石回転電機において、前記空隙は、前記永久磁石に面して配置された溝であることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the gap is a groove disposed facing the permanent magnet. 請求項１に記載の外転型永久磁石回転電機において、前記空隙と前記永久磁石との間の距離が3.0mm以下であることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein a distance between the gap and the permanent magnet is 3.0 mm or less. 請求項１に記載の外転型永久磁石回転電機において、前記空隙の幅が、前記永久磁石の幅に対して、40%以下であることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the width of the gap is 40% or less with respect to the width of the permanent magnet. 請求項１に記載の外転型永久磁石回転電機において、前記空隙は、前記回転子コアの内径側が長辺、外径側が短辺となる略台形であることを特徴とする外転型永久磁石回転電機。 2. The outer rotation type permanent magnet rotating electric machine according to claim 1, wherein the gap is a substantially trapezoidal shape in which the inner diameter side of the rotor core is a long side and the outer diameter side is a short side. Rotating electric machine. 請求項１に記載の外転型永久磁石回転電機において、前記空隙は、前記固定子の方向に底辺を備えた略三角形であることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the gap is a substantially triangular shape having a base in the direction of the stator. 請求項１に記載の外転型永久磁石回転電機において、前記空隙が、前記固定子の方向に底辺を備えた半円形状であることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the gap has a semicircular shape with a base in the direction of the stator. 請求項１に記載の外転型永久磁石回転電機において、前記空隙が、非磁性体で充填されていることを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the gap is filled with a non-magnetic material. 請求項１に記載の外転型永久磁石回転電機において、前記永久磁石は、前記回転子コアの前記間隙に面する位置に配置されたことを特徴とする外転型永久磁石回転電機。 The abduction-type permanent magnet rotating electrical machine according to claim 1, wherein the permanent magnet is disposed at a position facing the gap of the rotor core. 請求項１に記載の外転型永久磁石回転電機において、前記回転子は、回転軸と接続し、
前記外転型永久磁石回転電機は、エレベータのかごに繋がるロープを、巻きつける回転力を発生させることを特徴とする外転型永久磁石回転電機。 The outer rotor-type permanent magnet rotating electric machine according to claim 1, wherein the rotor is connected to a rotating shaft,
The abduction-type permanent magnet rotating electrical machine generates a rotational force for winding a rope connected to an elevator car.
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