JP4602958B2 - Permanent magnet motor, hermetic compressor and fan motor - Google Patents

Permanent magnet motor, hermetic compressor and fan motor Download PDF

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JP4602958B2
JP4602958B2 JP2006272426A JP2006272426A JP4602958B2 JP 4602958 B2 JP4602958 B2 JP 4602958B2 JP 2006272426 A JP2006272426 A JP 2006272426A JP 2006272426 A JP2006272426 A JP 2006272426A JP 4602958 B2 JP4602958 B2 JP 4602958B2
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permanent magnet
magnetic flux
hole
axis magnetic
core
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JP2008092715A (en
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和彦 馬場
智明 及川
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Mitsubishi Electric Corp
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Description

この発明は、回転子鉄心に設けた複数の磁石収容穴内部のそれぞれに永久磁石を収納し、極間鉄心部にq軸磁束抑制穴を設けることにより、リラクタンストルク、及び径方向加振力を低減することで騒音・振動を低減した永久磁石型モータ及び密閉型圧縮機及びファンモータに関するものである。   According to the present invention, a permanent magnet is housed in each of a plurality of magnet housing holes provided in a rotor core, and a reluctance torque and a radial excitation force are provided by providing a q-axis magnetic flux suppression hole in an interpole core portion. The present invention relates to a permanent magnet motor, a hermetic compressor, and a fan motor that are reduced in noise and vibration.

突極構造で回転子鉄心内に永久磁石を有する圧縮機用電動機の回転子において、各突極部の間の凹部の頂部を薄い肉厚のブリッジで結んで閉じた形状の空間が設けられた回転子鉄心を積層してなる圧縮機用電動機の回転子が提案されている(例えば、特許文献1参照)。
特開平6−323292号公報(第4頁、図2)
In the rotor of a compressor motor having a salient pole structure and having a permanent magnet in the rotor core, a closed space is formed by connecting the tops of the recesses between the salient pole parts with a thin-walled bridge. A rotor of an electric motor for a compressor formed by laminating a rotor core has been proposed (for example, see Patent Document 1).
JP-A-6-323292 (page 4, FIG. 2)

特許文献1に記載された永久磁石型モータは、各極間に空間が設けられているが、この空間は磁石収容穴の回転子鉄心外周部側にオーバーラップするように形成されていないので、モータ駆動時に固定子巻線に流れる電流によって作られる磁束が回転子鉄心の極間鉄心部に流れ込むのを抑制するには十分とは言えず、依然として、リラクタンストルクの増加や回転子鉄心に径方向の加振力の増加を招き、振動・騒音を増加させる等の課題があった。   The permanent magnet type motor described in Patent Document 1 is provided with a space between each pole, but this space is not formed so as to overlap the outer periphery of the rotor core of the magnet accommodation hole. It is not sufficient to suppress the magnetic flux generated by the current flowing in the stator windings when the motor is driven from flowing into the inter-core core of the rotor core, but it still increases the reluctance torque and the radial direction of the rotor core. There has been a problem such as an increase in vibration force and noise.

この発明は、上記のよう課題を解決するためになされたもので、回転子鉄心を一体構造で構成し、且つ、固定子巻線に流れる電流によって作られる磁束が、回転子鉄心の極間鉄心部に流れ込むのを抑制することでリラクタンストルク及び径方向加振力を低減して、騒音・振動の小さい永久磁石型モータ及び密閉型圧縮機及びファンモータを提供することを目的とする。   The present invention has been made in order to solve the above-described problems. The rotor core has a monolithic structure, and the magnetic flux generated by the current flowing in the stator winding is the inter-pole core of the rotor core. An object of the present invention is to provide a permanent magnet motor, a hermetic compressor, and a fan motor that reduce noise and vibration by reducing reluctance torque and radial excitation force by suppressing the flow into the section.

また、回転子鉄心を一体構造で構成し、且つ、磁石挿入穴に配置した永久磁石の端部の磁束による誘起電圧の歪みを抑制することができる永久磁石埋め込み型モータ及び密閉型圧縮機及びファンモータを提供することを目的とする。   In addition, a permanent magnet embedded motor, a hermetic compressor, and a fan that have a rotor core having an integral structure and that can suppress distortion of induced voltage due to magnetic flux at the end of the permanent magnet disposed in the magnet insertion hole. An object is to provide a motor.

この発明に係る永久磁石型モータは、リング状の積層鉄心からなり、円周方向に配置されたスロットと、隣接するスロットの間に形成された磁極ティースとを有する固定子鉄心と、この固定子鉄心の磁極ティースにコイルを巻装した固定子と、この固定子の磁極ティースの内周部に空隙を介して対向し、回転子鉄心内部に周方向に設けた複数の磁石収容穴内にN極とS極が交互に着磁された永久磁石を埋設し、隣り合う磁石収容穴の間に極間鉄心部が形成された回転子と、回転子鉄心の外周側で磁石収容穴より外側に設けられ、極間鉄心部を塞ぐように磁石収容穴の長手方向の一部とオーバーラップする第1のq軸磁束抑制穴と、第1のq軸磁束抑制穴の磁石収容穴の長手方向の一部とオーバーラップする部分と、磁石収容穴との間に周方向に形成された薄肉形状の内周鉄心部とを備えたことを特徴とする。   A permanent magnet type motor according to the present invention is composed of a ring-shaped laminated iron core, and has a stator core having slots arranged in the circumferential direction and magnetic pole teeth formed between adjacent slots, and the stator. A stator in which a coil is wound around magnetic core teeth of an iron core, and an N pole in a plurality of magnet receiving holes provided in the circumferential direction inside the rotor core, facing the inner peripheral portion of the magnetic teeth of the stator via a gap. Embedded with permanent magnets alternately magnetized with S and S poles, and an interpole core portion formed between adjacent magnet accommodation holes, and provided outside the magnet accommodation holes on the outer peripheral side of the rotor core A first q-axis magnetic flux suppression hole that overlaps a part of the longitudinal direction of the magnet accommodation hole so as to close the inter-electrode core, and one longitudinal direction of the magnet accommodation hole of the first q-axis magnetic flux suppression hole. Between the part that overlaps the part and the magnet accommodation hole Characterized by comprising an inner circumferential core portion of the formed thin shape.

この発明の永久磁石型モータは、上記構成により、永久磁石の作る磁束が回転子内部で短絡するのを抑制するとともに、固定子のコイルの作る磁束が極間鉄心部を通過するのを抑制できるため、トルクリップルが小さく、振動・騒音を抑制した永久磁石型モータを実現できる。   With the above configuration, the permanent magnet motor of the present invention can suppress the magnetic flux generated by the permanent magnet from being short-circuited inside the rotor, and can also prevent the magnetic flux generated by the stator coil from passing through the inter-pole core. Therefore, it is possible to realize a permanent magnet type motor having a small torque ripple and suppressing vibration and noise.

実施の形態1.
図1乃至図8は実施の形態1を示す図で、図1は永久磁石型モータの断面図、図2乃至図7は回転子9の極間鉄心部16付近の部分拡大図、図8は回転子9の断面図である。
Embodiment 1 FIG.
1 to 8 show the first embodiment, FIG. 1 is a cross-sectional view of a permanent magnet type motor, FIGS. 2 to 7 are partially enlarged views of the vicinity of the inter-core portion 16 of the rotor 9, and FIG. 3 is a cross-sectional view of a rotor 9. FIG.

図1において、リング状の固定子鉄心1は、厚み0.35〜0.5mm程度の薄い電磁鋼板を一枚一枚打ち抜いて所定の枚数を積層することで構成されている。固定子鉄心1には、内周面側に周方向に配置されて軸方向へ延びる、例えば9個のスロット2が設けられる。隣接するスロット2間には磁極ティース3が形成されている。磁極ティース3は、外径側から内径側にかけて略平行の形状を有しており、先端部(内径側)になるにつれ、両サイドが周方向に広がるような傘状の構造となっている。この様に、磁極ティース3の先端部を傘状とすることで、回転子に配置された永久磁石8の磁力を効率良く使用し、トルクを向上できる構造となっている。また、磁極ティース3の内周側の両端部には、空隙10の長さが大きくなるように磁極ティース3の長手方向中心線(径方向)に対して略垂直なカット面20が形成された構造となっている。   In FIG. 1, a ring-shaped stator core 1 is formed by punching out thin electromagnetic steel sheets having a thickness of about 0.35 to 0.5 mm one by one and laminating a predetermined number. The stator core 1 is provided with, for example, nine slots 2 that are arranged on the inner peripheral surface side in the circumferential direction and extend in the axial direction. Magnetic pole teeth 3 are formed between adjacent slots 2. The magnetic pole teeth 3 have a substantially parallel shape from the outer diameter side to the inner diameter side, and have an umbrella-like structure in which both sides spread in the circumferential direction as it becomes the tip (inner diameter side). As described above, the tip of the magnetic pole teeth 3 is formed in an umbrella shape so that the magnetic force of the permanent magnet 8 disposed on the rotor can be used efficiently and the torque can be improved. Further, cut surfaces 20 that are substantially perpendicular to the longitudinal center line (radial direction) of the magnetic teeth 3 are formed at both ends on the inner peripheral side of the magnetic teeth 3 so that the length of the gap 10 is increased. It has a structure.

コイル4は、磁極ティース3に機種毎に設定される所定の巻数を直接巻き付けてなる3相Y結線の集中巻線のもので、銅線を絶縁を介して磁極ティース3に巻き付けている。コイル4のターン数や線径などは、要求される回転数やトルク、電圧仕様、スロット2の断面積等に応じて定まる。本実施の形態の場合は、例えば、線径φ0.5mm程度の銅線を100ターン程度巻き付けている。固定子5は固定子鉄心1及び磁極ティース3に巻き付けられるコイル4を有する。   The coil 4 is a concentrated winding of a three-phase Y-connection in which a predetermined number of turns set for each model is directly wound around the magnetic pole teeth 3, and a copper wire is wound around the magnetic pole teeth 3 via insulation. The number of turns and the wire diameter of the coil 4 are determined according to the required number of rotations, torque, voltage specification, cross-sectional area of the slot 2, and the like. In the case of the present embodiment, for example, a copper wire having a wire diameter of about 0.5 mm is wound about 100 turns. The stator 5 has a coil 4 wound around the stator core 1 and the magnetic pole teeth 3.

固定子5に対して回転可能な回転軸6が固定子5の軸線上に配置され、回転軸6に略真円形状の回転子9が固定されている。回転子9と固定子5との間には、0.3〜1mm程度の空隙10が設けられ、回転軸6を中心に回転可能な構造となっている。   A rotating shaft 6 that can rotate with respect to the stator 5 is disposed on the axis of the stator 5, and a substantially circular rotor 9 is fixed to the rotating shaft 6. A gap 10 of about 0.3 to 1 mm is provided between the rotor 9 and the stator 5, and has a structure that can rotate around the rotation shaft 6.

回転子鉄心7は、固定子5と同様に電磁鋼板を一枚一枚打ち抜いて積層することで構成されている。図2に示すように、回転子鉄心7には、磁石収容穴11が周方向に6個配置される。磁石収容穴11の内部には、N極とS極とが交互になるように着磁された6枚の平板形状のネオジウム、鉄、ボロンを主成分とする希土類永久磁石8が挿入され、隣り合う永久磁石8の間には極間鉄心部16が形成されている。   The rotor core 7 is configured by punching and stacking magnetic steel sheets one by one in the same manner as the stator 5. As shown in FIG. 2, six magnet housing holes 11 are arranged in the circumferential direction in the rotor core 7. Six flat plate-shaped rare earth permanent magnets 8 mainly composed of neodymium, iron, and boron, which are magnetized so that N poles and S poles are alternately inserted, are inserted in the magnet housing hole 11 and adjacent to each other. Between the matching permanent magnets 8, an interpole iron core 16 is formed.

また、回転子鉄心7の外周側には、1極当たり1個の第1のq軸磁束抑制穴12が極間鉄心部16を塞ぐように磁石収容穴11の長手方向の一部とオーバーラップさせて設けられている。さらに、回転子鉄心7の外周部と第1のq軸磁束抑制穴12の間には外周鉄心部13を、磁石収容穴11と第1のq軸磁束抑制穴12の間には、内周鉄心部14を形成することにより、回転子鉄心を一体構造となるように構成されている。   In addition, on the outer peripheral side of the rotor core 7, one first q-axis magnetic flux suppression hole 12 per pole overlaps with a part of the magnet housing hole 11 in the longitudinal direction so as to block the interpolar core portion 16. Is provided. Further, an outer peripheral iron core portion 13 is provided between the outer peripheral portion of the rotor core 7 and the first q-axis magnetic flux suppression hole 12, and an inner periphery is provided between the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12. By forming the iron core portion 14, the rotor iron core is configured to have an integral structure.

外周鉄心部13の径方向長さ、及び、内周鉄心部14の径方向長さは、永久磁石8の発する磁束の短絡を防止するという観点から、強度の許容範囲内で小さく、薄肉で構成するのが望ましく、本実施の形態の場合、外周鉄心部13の径方向長さ、及び、内周鉄心部14の径方向長さ共、電磁鋼板の板厚(0.35〜0.5mm程度)と同じ長さとしている。   The radial length of the outer peripheral core portion 13 and the radial length of the inner peripheral core portion 14 are small and thin within the allowable range of strength from the viewpoint of preventing short circuit of the magnetic flux generated by the permanent magnet 8. In the case of the present embodiment, the radial length of the outer peripheral core portion 13 and the radial length of the inner peripheral core portion 14 are both the thickness of the electromagnetic steel sheet (about 0.35 to 0.5 mm). ) And the same length.

また、第1のq軸磁束抑制穴12の極間鉄心部16と対向する径方向長さ、及び、第1のq軸磁束抑制穴12の磁石収容穴11の長手方向の一部とオーバーラップするオーバーラップ部付近の径方向長さを、磁石収容穴11の径方向長さの1/3以上とし、さらに、少なくとも極間鉄心部16と対向する領域Aの第1のq軸磁束抑制穴12の径方向長さBを空隙10の長さよりも大きくなるように構成することで、固定子5のコイル4から発するq軸磁束15を有効に抑制できるように構成している。   Further, the radial length of the first q-axis magnetic flux suppression hole 12 facing the inter-pole core portion 16 and the part of the first q-axis magnetic flux suppression hole 12 in the longitudinal direction of the magnet housing hole 11 overlap. The radial length in the vicinity of the overlapping portion to be set is not less than 1/3 of the radial length of the magnet housing hole 11, and at least the first q-axis magnetic flux suppression hole in the region A facing the interpolar core portion 16. 12 is configured such that the q-axis magnetic flux 15 emitted from the coil 4 of the stator 5 can be effectively suppressed by configuring the radial length B of 12 to be greater than the length of the gap 10.

上記のように、回転子鉄心7の外周側には、1極当たり1個の第1のq軸磁束抑制穴12が極間鉄心部16を塞ぐように磁石収容穴11の長手方向の一部とオーバーラップさせて設けることにより、永久磁石8の作る磁束が回転子9の内部で短絡するのを抑制するとともに、固定子5のコイル4の作る磁束が極間鉄心部16を通過するのを抑制できるため、トルクリップルが小さく、振動・騒音を抑制したモータを実現できる。   As described above, a part of the magnet housing hole 11 in the longitudinal direction is provided on the outer peripheral side of the rotor core 7 so that one first q-axis magnetic flux suppression hole 12 per pole covers the inter-core portion 16. Are provided so that the magnetic flux produced by the permanent magnet 8 is prevented from being short-circuited inside the rotor 9, and the magnetic flux produced by the coil 4 of the stator 5 is allowed to pass through the interpolar core 16. Since it can be suppressed, it is possible to realize a motor with low torque ripple and suppressed vibration and noise.

また、極間鉄心部16の幅(周方向)を大きくすることができるため、回転方向に対する十分な強度を確保でき、高トルクに対応したモータが実現できる。また、固定子5のコイル4から発する減磁界が磁石の両側にまで及ぶのを抑制し、永久磁石8の端部の減磁を抑制することができる。   Moreover, since the width | variety (circumferential direction) of the interelectrode core part 16 can be enlarged, sufficient intensity | strength with respect to a rotation direction can be ensured, and the motor corresponding to high torque is realizable. Further, it is possible to suppress the demagnetizing field generated from the coil 4 of the stator 5 from reaching both sides of the magnet, and to suppress demagnetization at the end of the permanent magnet 8.

また、永久磁石8の磁束を極中心方向に収束させることができ、誘起電圧の歪みを低減し、振動・騒音の小さい永久磁石型モータを実現することができる。   Further, the magnetic flux of the permanent magnet 8 can be converged in the direction of the pole center, the induced voltage distortion can be reduced, and a permanent magnet type motor with low vibration and noise can be realized.

また、回転子鉄心7の外径形状を略真円となるように構成したので、加工性、及び、組立性が良好で、かつ、風切り音の小さい永久磁石型モータを実現することができる。   Moreover, since the outer diameter shape of the rotor core 7 is configured to be a substantially perfect circle, it is possible to realize a permanent magnet type motor that has good workability and assemblability and has low wind noise.

また、固定子鉄心1の磁極ティース3の内周部の両端部には、空隙10の長さが大きくなるように磁極ティース3の長手方向中心線に対して略垂直なカット面20を形成したため、磁束が極間鉄心部16を通過するのを抑制するとともに、誘起電圧の歪みを低減し、振動・騒音の小さい永久磁石型モータを実現することができる。   Further, the cut surfaces 20 that are substantially perpendicular to the longitudinal center line of the magnetic teeth 3 are formed at both ends of the inner peripheral portion of the magnetic teeth 3 of the stator core 1 so that the length of the gap 10 is increased. In addition to suppressing the magnetic flux from passing through the inter-core member 16, it is possible to reduce the distortion of the induced voltage and to realize a permanent magnet type motor with low vibration and noise.

なお、本実施の形態では、9スロット6極の集中巻を例に説明したが、スロット数、極数、巻線方式はこれに限定されるものではなく、原理的に動作可能なスロット数、極数、巻線方式(分布巻、波巻など)の組み合わせを適宜選択することで同様の効果が得られる。   In this embodiment, the concentrated winding of 9 slots and 6 poles has been described as an example. However, the number of slots, the number of poles, and the winding method are not limited to this, and the number of slots that can be operated in principle, A similar effect can be obtained by appropriately selecting the combination of the number of poles and the winding method (distributed winding, wave winding, etc.).

また、永久磁石8の材質は、希土類磁石に限定されるものではなく、要求出力、回転数、トルクに応じてフェライト系の永久磁石などで適宜構成することにより同様の効果が得られる。   The material of the permanent magnet 8 is not limited to the rare earth magnet, and the same effect can be obtained by appropriately configuring the permanent magnet 8 with a ferrite permanent magnet or the like according to the required output, rotation speed, and torque.

さらに、固定子鉄心1、回転子鉄心7の材質は、電磁鋼板に限定されるものではなく、要求出力、回転数、トルクに応じて粉末鉄心材、または、それらに代わる材料などで適宜構成することにより同様の効果が得られる。   Furthermore, the material of the stator core 1 and the rotor core 7 is not limited to the electromagnetic steel sheet, and is appropriately configured with a powdered iron core material or an alternative material according to the required output, rotation speed, and torque. Thus, the same effect can be obtained.

また、永久磁石8の配向方向についても、平行配向、ラジアル配向、極配向など、如何なる配向方向であっても同様な効果が得られることは言うまでもない。   Further, it goes without saying that the same effect can be obtained with any orientation direction such as parallel orientation, radial orientation, and polar orientation with respect to the orientation direction of the permanent magnet 8.

また、回転子鉄心7の外周と第1のq軸磁束抑制穴12の間に設けた外周鉄心部13の径方向の長さ、及び、磁石収容穴11と第1のq軸磁束抑制穴12の間に設けた内周鉄心部14の径方向の長さは、回転子が高速で駆動した場合であっても遠心力に耐えうる強度以上の長さが確保されていれば、均一の長さであっても、不均一の長さであってもよい。   Further, the radial length of the outer peripheral core portion 13 provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12, and the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12. The length of the inner peripheral core portion 14 provided in the radial direction is a uniform length as long as the length is sufficient to withstand centrifugal force even when the rotor is driven at high speed. Or a non-uniform length.

なお、この場合、図3、図4、図5の回転子9の極間部付近の部分拡大図で示すように回転子鉄心7の外周と第1のq軸磁束抑制穴12の間に設けた外周鉄心部13の径方向の長さ、及び、磁石収容穴11と第1のq軸磁束抑制穴12の間に設けた内周鉄心部14の径方向の長さの少なくともどちらか一方の長さを、極間側の長さに対して永久磁石8の磁極中心側の長さを1.5倍〜3倍程度になるよう大きく構成することにより、誘起電圧の歪みを効果的に低減することが可能である。   In this case, it is provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12 as shown in a partially enlarged view near the interpolar portion of the rotor 9 in FIGS. The length of the outer peripheral core portion 13 in the radial direction and the length of the inner peripheral core portion 14 provided between the magnet housing hole 11 and the first q-axis magnetic flux suppression hole 12 in the radial direction. The length of the magnetic pole center side of the permanent magnet 8 is made to be about 1.5 to 3 times longer than the length between the poles, thereby effectively reducing the distortion of the induced voltage. Is possible.

図3の例は、磁石収容穴11と第1のq軸磁束抑制穴12の間に設けた内周鉄心部14の径方向の長さを、極間側の長さに対して永久磁石8の磁極中心側の長さを1.5倍〜3倍程度になるよう大きく構成している。   In the example of FIG. 3, the length in the radial direction of the inner peripheral iron core portion 14 provided between the magnet accommodation hole 11 and the first q-axis magnetic flux suppression hole 12 is set to the permanent magnet 8 with respect to the length between the poles. The length on the magnetic pole center side is made large to be about 1.5 to 3 times.

図4の例は、回転子鉄心7の外周と第1のq軸磁束抑制穴12の間に設けた外周鉄心部13の径方向の長さを、極間側の長さに対して永久磁石8の磁極中心側の長さを1.5倍〜3倍程度になるよう大きく構成している。   In the example of FIG. 4, the length in the radial direction of the outer peripheral core portion 13 provided between the outer periphery of the rotor core 7 and the first q-axis magnetic flux suppression hole 12 is set to a permanent magnet with respect to the length on the interpolar side. The length of the magnetic pole center side of 8 is made large to be about 1.5 to 3 times.

図5の例は、磁石収容穴11と第1のq軸磁束抑制穴12の間に設けた内周鉄心部14の径方向の長さ、及び回転子鉄心7の外周と第1のq軸磁束抑制穴12の間に設けた外周鉄心部13の径方向の長さの両方を、極間側の長さに対して永久磁石8の磁極中心側の長さを1.5倍〜3倍程度になるよう大きく構成している。   In the example of FIG. 5, the radial length of the inner peripheral core portion 14 provided between the magnet accommodation hole 11 and the first q-axis magnetic flux suppression hole 12, the outer periphery of the rotor core 7, and the first q-axis. Both of the lengths in the radial direction of the outer peripheral iron core portion 13 provided between the magnetic flux suppression holes 12 are 1.5 times to 3 times the length on the magnetic pole center side of the permanent magnet 8 with respect to the length on the interpole side. It is configured to be large.

また、本実施の形態では、第1のq軸磁束抑制穴12の外周側に外周鉄心部13を、第1のq軸磁束抑制穴12の内周側に内周鉄心部14を設けて一体構造になるように構成したが、これに限られるものではなく、図6に示すように、内周鉄心部14が形成されていれば外周鉄心部13は無くてもよい。また、図7で示すように、外周鉄心部13があれば内周鉄心部14の片側を空間として、第1のq軸磁束抑制穴12と磁石収容穴11が連通する構成でもよい。   Further, in the present embodiment, the outer peripheral core portion 13 is provided on the outer peripheral side of the first q-axis magnetic flux suppression hole 12, and the inner peripheral core portion 14 is provided on the inner peripheral side of the first q-axis magnetic flux suppression hole 12. Although it was configured to have a structure, the present invention is not limited to this, and as shown in FIG. 6, the outer peripheral core portion 13 may be omitted as long as the inner peripheral core portion 14 is formed. Further, as shown in FIG. 7, if there is an outer peripheral core portion 13, the first q-axis magnetic flux suppression hole 12 and the magnet accommodation hole 11 may communicate with one side of the inner peripheral core portion 14 as a space.

また、本実施の形態では、永久磁石8の形状を平板形状とし、6枚の磁石を周方向に六角形を形成するように配置したが、磁石の枚数、形状、配置は、これに限定されるものではない。   Further, in the present embodiment, the shape of the permanent magnet 8 is a flat plate shape, and the six magnets are arranged so as to form a hexagon in the circumferential direction. However, the number, shape, and arrangement of the magnets are limited to this. It is not something.

また、図8に示すように磁石収容穴11の外周側の回転子鉄心7に1mm前後の幅の2本以上のスリット17を設け、スリット17間の間隔を外周側が小となるようハの字状に配置することにより、永久磁石8の発する磁束の極中心方向への収束効果を向上させ、誘起電圧の歪みをより効果的に抑制するとともに、巻線の磁束により発生するリラクタンストルク、及び、径方向加振力を低減し、振動・騒音を抑制することが可能である。   Further, as shown in FIG. 8, two or more slits 17 having a width of about 1 mm are provided in the rotor core 7 on the outer peripheral side of the magnet housing hole 11 so that the interval between the slits 17 is small so that the outer peripheral side is small. By arranging in a shape, the effect of converging the magnetic flux generated by the permanent magnet 8 toward the pole center direction is improved, the distortion of the induced voltage is more effectively suppressed, the reluctance torque generated by the magnetic flux of the winding, and It is possible to reduce radial excitation force and suppress vibration and noise.

また、本実施の形態では、図面の簡略化のため、各コーナ部の面取りや丸取り部を省略して図示したが、必要に応じて適宜面取り部や丸取り部を設けることで、打ち抜き性が改善され、応力の集中を回避することができる。   Further, in the present embodiment, for the sake of simplification of the drawings, the corner portions are not chamfered or rounded, but the punching property can be improved by appropriately providing a chamfered portion or a rounded portion as necessary. Is improved and stress concentration can be avoided.

実施の形態2.
図9は実施の形態2を示す図で、回転子9の断面図である。
Embodiment 2. FIG.
FIG. 9 is a cross-sectional view of the rotor 9 showing the second embodiment.

以上の実施の形態1では、回転子鉄心7の外周側には、1極当たり1個の第1のq軸磁束抑制穴12が極間鉄心部16を塞ぐように磁石収容穴11の長手方向の一部とオーバーラップさせて設けていたが、本実施の形態では、それに加え、磁石収容穴11の内径側に、磁石収容穴11と分離した第2のq軸磁束抑制穴18を極間鉄心部16を塞ぐように磁石収容穴11の長手方向の一部とオーバーラップさせて構成した。   In the first embodiment described above, the longitudinal direction of the magnet housing hole 11 on the outer peripheral side of the rotor core 7 is such that one first q-axis magnetic flux suppression hole 12 per pole closes the inter-core portion 16. In this embodiment, in addition to this, the second q-axis magnetic flux suppression hole 18 separated from the magnet accommodation hole 11 is provided between the poles on the inner diameter side of the magnet accommodation hole 11. It was configured to overlap with a part of the magnet housing hole 11 in the longitudinal direction so as to close the iron core portion 16.

実施の形態1では、回転子9の外周側に設けた第1のq軸磁束抑制穴12の径方向長さBを空隙10の長さ以上としたが、本実施の形態では、外周側に設けた第1のq軸磁束抑制穴12の径方向長さBと、内周側に設けた第2のq軸磁束抑制穴18の径方向長さCの和を、磁石収容穴11の径方向の長さの1/3以上とし、且つ空隙10の径方向長さ以上になるように構成されている。   In the first embodiment, the radial length B of the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side of the rotor 9 is equal to or larger than the length of the gap 10. The sum of the radial length B of the first q-axis magnetic flux suppression hole 12 provided and the radial length C of the second q-axis magnetic flux suppression hole 18 provided on the inner peripheral side is the diameter of the magnet housing hole 11. It is configured to be at least 1/3 of the length in the direction and at least the radial length of the gap 10.

上記のように構成することにより、実施の形態1と同様な効果が得られる他、内周側に第2のq軸磁束抑制穴18を設けるように構成したので、外周側の第1のq軸磁束抑制穴12の径方向長さBを小さく構成することができ、磁石収容穴11を回転子鉄心7の外周側に配置して磁石収容穴11の周方向幅を大きく構成し、回転子鉄心7の内部により大きな永久磁石8を埋め込むことが可能となり、効率の良好な永久磁石型モータを実現できる。   By configuring as described above, the same effects as those of the first embodiment can be obtained, and the second q-axis magnetic flux suppression hole 18 is provided on the inner peripheral side, so that the first q on the outer peripheral side is provided. The radial length B of the axial magnetic flux suppression hole 12 can be configured to be small, and the magnet housing hole 11 is arranged on the outer peripheral side of the rotor core 7 so that the circumferential width of the magnet housing hole 11 is increased. It becomes possible to embed a large permanent magnet 8 in the iron core 7, thereby realizing an efficient permanent magnet type motor.

実施の形態3.
図10乃至図13は実施の形態3を示す図で、回転子9の断面図である。
Embodiment 3 FIG.
10 to 13 are diagrams showing the third embodiment, and are sectional views of the rotor 9.

実施の形態2では、回転子鉄心7の外周側に、1極当たり1個の第1のq軸磁束抑制穴12が極間鉄心部16を塞ぐように磁石収容穴11の一部とオーバーラップさせて設け、さらに磁石収容穴11の内径側に、磁石収容穴11と分離した第2のq軸磁束抑制穴18を極間鉄心部16を塞ぐように磁石収容穴11の長手方向の一部とオーバーラップさせて設けたが、本実施の形態では、それらに加え、隣接する磁石収容穴11の間の部分に、磁石収容穴11と分離した第3のq軸磁束抑制穴19を設けた構造とした。   In the second embodiment, a part of the magnet housing hole 11 overlaps the outer peripheral side of the rotor core 7 so that one first q-axis magnetic flux suppression hole 12 per pole covers the inter-core portion 16. Further, a second q-axis magnetic flux suppression hole 18 separated from the magnet accommodation hole 11 is provided on the inner diameter side of the magnet accommodation hole 11 and a part of the magnet accommodation hole 11 in the longitudinal direction so as to close the interpolar core portion 16. In this embodiment, in addition to these, a third q-axis magnetic flux suppression hole 19 separated from the magnet accommodation hole 11 is provided in a portion between the adjacent magnet accommodation holes 11. The structure.

上記のように構成することにより、q軸磁束の抑制効果を一層向上し、振動・騒音を低減した永久磁石型モータを実現することができる。   By configuring as described above, it is possible to realize a permanent magnet motor that further improves the effect of suppressing the q-axis magnetic flux and reduces vibration and noise.

図11に示すように、内周側に設けた第2のq軸磁束抑制穴18がなく、回転子鉄心7の外周側に設けた第1のq軸磁束抑制穴12と、第3のq軸磁束抑制穴19との構成でもよい。そして、図11に示すように、外周側に設けた第1のq軸磁束抑制穴12と、第3のq軸磁束抑制穴19とを連結して内径側に凸形状の一体構造としてもよい。   As shown in FIG. 11, there is no second q-axis magnetic flux suppression hole 18 provided on the inner peripheral side, and the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side of the rotor core 7 and the third q The structure with the axial magnetic flux suppression hole 19 may be sufficient. Then, as shown in FIG. 11, the first q-axis magnetic flux suppression hole 12 provided on the outer peripheral side and the third q-axis magnetic flux suppression hole 19 may be connected to form an integral structure having a convex shape on the inner diameter side. .

また、図12に示すように、第2のq軸磁束抑制穴18と、第3のq軸磁束抑制穴19とを連結して外径側に凸の一体構造としてもよい。   Also, as shown in FIG. 12, the second q-axis magnetic flux suppression hole 18 and the third q-axis magnetic flux suppression hole 19 may be connected to form an integral structure protruding outward.

また、図示しないが、第1のq軸磁束抑制穴12と、第2のq軸磁束抑制穴18と、第3のq軸磁束抑制穴19とをそれぞれ連結して一体構造としても同様の効果を得ることができる。   Although not shown, the same effect can be obtained by connecting the first q-axis magnetic flux suppression hole 12, the second q-axis magnetic flux suppression hole 18, and the third q-axis magnetic flux suppression hole 19 to form an integrated structure. Can be obtained.

また、外周側の第1のq軸磁束抑制穴12、または、内周側の第2のq軸磁束抑制穴18、または、中間の第3のq軸磁束抑制穴19の少なくとも一つの穴を拡大することで、磁石収容穴11の一部を永久磁石8長さよりも小さくなるように構成した後、永久磁石8を磁石収容穴11へ圧入することにより、永久磁石8の固定を容易に行うことが可能である。   Further, at least one hole of the first q-axis magnetic flux suppression hole 12 on the outer peripheral side, the second q-axis magnetic flux suppression hole 18 on the inner peripheral side, or the third q-axis magnetic flux suppression hole 19 in the middle is provided. By enlarging, a part of the magnet accommodation hole 11 is configured to be smaller than the length of the permanent magnet 8, and then the permanent magnet 8 is easily fixed by pressing the permanent magnet 8 into the magnet accommodation hole 11. It is possible.

図13は、第3のq軸磁束抑制穴19を磁石収容穴11側に拡大し、湾曲部21を設けた構造を示す断面図である。湾曲部21は、回転子鉄心7の軸方向の全長に渡って形成する必要はなく、一部に構成されていれば、永久磁石8を固定するのに十分な保持力を得ることができる。   FIG. 13 is a cross-sectional view showing a structure in which the third q-axis magnetic flux suppression hole 19 is enlarged to the magnet housing hole 11 side and a bending portion 21 is provided. The bending portion 21 does not need to be formed over the entire length of the rotor core 7 in the axial direction. If the bending portion 21 is partly configured, a sufficient holding force for fixing the permanent magnet 8 can be obtained.

実施の形態4.
図14、図15は実施の形態4を示す図で、図14はロータリ圧縮機30の縦断面図、図15はロータリ圧縮機30の電動要素31における横断面図である。上記実施の形態1乃至3に記載の永久磁石型モータをロータリ圧縮機(密閉型圧縮機の一例)に搭載した例である。
Embodiment 4 FIG.
14 and 15 show the fourth embodiment. FIG. 14 is a longitudinal sectional view of the rotary compressor 30, and FIG. 15 is a transverse sectional view of the electric element 31 of the rotary compressor 30. This is an example in which the permanent magnet type motor described in the first to third embodiments is mounted on a rotary compressor (an example of a hermetic compressor).

図において、ロータリ圧縮機30は密閉容器33の内部に、電動要素31と、圧縮要素32とを収納している。電動要素31に上記実施の形態1乃至3に記載の永久磁石型モータを使用することにより、永久磁石型モータの固定子に流れる電流によって作られる磁束が回転子鉄心7の極間鉄心部16に流れ込むのを抑制することで振動・騒音を低減することができる。   In the figure, the rotary compressor 30 houses an electric element 31 and a compression element 32 inside a sealed container 33. By using the permanent magnet type motor described in the first to third embodiments as the electric element 31, the magnetic flux generated by the current flowing through the stator of the permanent magnet type motor is generated in the interpole core portion 16 of the rotor core 7. Vibration and noise can be reduced by suppressing the flow.

実施の形態5.
図16は実施の形態5を示す図で、ファンモータの断面図である。上記実施の形態1乃至3に記載の永久磁石型モータをファンモータに搭載した例である。
Embodiment 5 FIG.
FIG. 16 shows the fifth embodiment, and is a cross-sectional view of the fan motor. This is an example in which the permanent magnet type motor described in the first to third embodiments is mounted on a fan motor.

図において、ファンモータ50は、上記実施の形態1に記載の固定子5をモールドしたモールド固定子53と、上記実施の形態1乃至3に記載の回転子9と、軸受52とを回転軸に嵌合した回転子組立51とをブラケット54を用いて組み立てる。   In the figure, the fan motor 50 has a mold stator 53 in which the stator 5 described in the first embodiment is molded, the rotor 9 described in the first to third embodiments, and a bearing 52 as rotational axes. The fitted rotor assembly 51 is assembled using the bracket 54.

そのように構成することにより、永久磁石型モータの固定子5に流れる電流によって作られる磁束が回転子鉄心7の極間鉄心部16に流れ込むのを抑制することで振動・騒音を低減することができるとともに寿命を大幅に改善したファンモータ50を実現できる。   With such a configuration, it is possible to reduce vibration and noise by suppressing the magnetic flux generated by the current flowing through the stator 5 of the permanent magnet type motor from flowing into the inter-core portion 16 of the rotor core 7. In addition, it is possible to realize the fan motor 50 that can greatly improve the service life.

実施の形態1を示す図で、永久磁石型モータの断面図である。FIG. 2 is a diagram showing the first embodiment and is a cross-sectional view of a permanent magnet type motor. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の極間鉄心部16付近の部分拡大図である。FIG. 5 shows the first embodiment, and is a partially enlarged view of the vicinity of an interelectrode core portion 16 of the rotor 9. 実施の形態1を示す図で、回転子9の断面図である。FIG. 5 shows the first embodiment, and is a cross-sectional view of a rotor 9. 実施の形態2を示す図で、回転子9の断面図である。FIG. 5 shows the second embodiment and is a cross-sectional view of the rotor 9. 実施の形態3を示す図で、回転子9の断面図である。FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. 実施の形態3を示す図で、回転子9の断面図である。FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. 実施の形態3を示す図で、回転子9の断面図である。FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. 実施の形態3を示す図で、回転子9の断面図である。FIG. 6 is a diagram illustrating the third embodiment, and is a cross-sectional view of a rotor 9. 実施の形態4を示す図で、ロータリ圧縮機30の縦断面図である。FIG. 5 is a diagram illustrating the fourth embodiment, and is a longitudinal sectional view of a rotary compressor 30. FIG. 実施の形態4を示す図で、ロータリ圧縮機30の電動要素31における横断面図である。FIG. 10 is a diagram showing the fourth embodiment, and is a cross-sectional view of an electric element 31 of a rotary compressor 30. 実施の形態5を示す図で、ファンモータ50の断面図である。FIG. 10 is a diagram illustrating the fifth embodiment and is a cross-sectional view of the fan motor 50.

符号の説明Explanation of symbols

1 固定子鉄心、2 スロット、3 磁極ティース、4 コイル、5 固定子、6 回転軸、7 回転子鉄心、8 永久磁石、9 回転子、10 空隙、11 磁石収容穴、12 第1のq軸磁束抑制穴、13 外周鉄心部、14 内周鉄心部、15 q軸磁束、16 極間鉄心部、17 スリット、18 第2のq軸磁束抑制穴、19 第3のq軸磁束抑制穴、20 カット面、21 湾曲部、30 ロータリ圧縮機、31 電動要素、32 圧縮要素、33 密閉容器、50 ファンモータ、51 回転子組立、52 軸受、53 モールド固定子、54 ブラケット。   1 Stator Core, 2 Slots, 3 Magnetic Teeth, 4 Coils, 5 Stator, 6 Rotating Shaft, 7 Rotor Core, 8 Permanent Magnet, 9 Rotor, 10 Gap, 11 Magnet Housing Hole, 12 First q-axis Magnetic flux suppression hole, 13 Outer core part, 14 Inner core part, 15 q-axis magnetic flux, 16 Interpole core part, 17 Slit, 18 Second q-axis magnetic flux suppression hole, 19 Third q-axis magnetic flux suppression hole, 20 Cut surface, 21 curved portion, 30 rotary compressor, 31 electric element, 32 compression element, 33 airtight container, 50 fan motor, 51 rotor assembly, 52 bearing, 53 mold stator, 54 bracket.

Claims (16)

リング状の積層鉄心からなり、円周方向に配置されたスロットと、隣接するスロットの間に形成された磁極ティースとを有する固定子鉄心と、
この固定子鉄心の前記磁極ティースにコイルを巻装した固定子と、
この固定子の前記磁極ティースの内周部に空隙を介して対向し、回転子鉄心内部に周方向に設けた複数の磁石収容穴内にN極とS極が交互に着磁された永久磁石を埋設し、隣り合う前記磁石収容穴の間に極間鉄心部が形成された回転子と、
前記回転子鉄心の外周側で前記磁石収容穴より外側に設けられ、前記極間鉄心部を塞ぐように前記磁石収容穴の長手方向の一部とオーバーラップする第1のq軸磁束抑制穴と、
前記第1のq軸磁束抑制穴の前記磁石収容穴の長手方向の一部とオーバーラップする部分と、前記磁石収容穴との間に周方向に形成された薄肉形状の内周鉄心部とを備え、前記回転子鉄心の外周部と、前記第1のq軸磁束抑制穴との間に、薄肉の外周鉄心部を形成し、前記第1のq軸磁束抑制穴の両端部付近の内側に形成された一対の前記内周鉄心部の一方を空間とし、前記内周鉄心部の他方と、前記外周鉄心部とにより前記回転子鉄心を一体構造としたことを特徴とする永久磁石型モータ。
A stator core made of a ring-shaped laminated core and having slots arranged in the circumferential direction and magnetic pole teeth formed between adjacent slots;
A stator in which a coil is wound around the magnetic teeth of the stator core;
A permanent magnet in which N poles and S poles are alternately magnetized in a plurality of magnet housing holes provided in the rotor core in a circumferential direction so as to face the inner peripheral portion of the magnetic pole teeth of the stator. Embedded, and a rotor in which an interelectrode core is formed between the adjacent magnet housing holes;
A first q-axis magnetic flux suppression hole that is provided on the outer peripheral side of the rotor core and outside the magnet accommodation hole and overlaps with a part of the magnet accommodation hole in the longitudinal direction so as to close the inter-electrode core portion; ,
A portion of the first q-axis magnetic flux suppression hole that overlaps a part in the longitudinal direction of the magnet accommodation hole, and a thin-walled inner peripheral iron core portion formed in the circumferential direction between the magnet accommodation hole. A thin-walled outer peripheral core portion is formed between the outer periphery of the rotor core and the first q-axis magnetic flux suppression hole, and inside the vicinity of both end portions of the first q-axis magnetic flux suppression hole. One of the pair of inner peripheral core portions formed is a space, and the rotor core is integrally structured by the other inner peripheral core portion and the outer peripheral core portion .
前記第1のq軸磁束抑制穴の前記極間鉄心部と対向する部分の径方向長さ、及び前記第1のq軸磁束抑制穴の前記前記磁石収容穴の長手方向の一部とオーバーラップする部分の径方向長さを、前記磁石収容穴の径方向長さの1/3以上としたことを特徴とする請求項1記載の永久磁石型モータ。   A radial length of a portion of the first q-axis magnetic flux suppression hole facing the inter-pole core portion and a part of the first q-axis magnetic flux suppression hole in the longitudinal direction of the magnet accommodation hole overlap. The permanent magnet type motor according to claim 1, wherein the radial length of the portion to be made is at least 1/3 of the radial length of the magnet receiving hole. 前記外周鉄心部を空間とし、前記内周鉄心部により前記回転子鉄心を一体構造としたことを特徴とする請求項記載の永久磁石型モータ。 Wherein the outer circumferential core portion and space, the permanent magnet type motor according to claim 1, characterized in that an integral structure of the rotor core by the inner circumferential core portion. 前記外周鉄心部の径方向の長さと、前記内周鉄心部の径方向の長さとの少なくともどちらか一方を、極間側の長さに対し、前記永久磁石の磁極中心側の長さを大きくなるように構成したことを特徴とする請求項記載の永久磁石型モータ。 At least one of the length in the radial direction of the outer peripheral core portion and the length in the radial direction of the inner peripheral core portion is set so that the length on the magnetic pole center side of the permanent magnet is larger than the length on the interpole side. The permanent magnet type motor according to claim 1 , wherein the permanent magnet type motor is configured as described above. 前記磁石収容穴の内側の極間部に、前記磁石収容穴と分離した第2のq軸磁束抑制穴を前記極間鉄心部を塞ぎ、且つ、両側の前記磁石収容穴とオーバーラップするように設けたことを特徴とする請求項1乃至4のいずれかに記載の永久磁石型モータ。 A second q-axis magnetic flux suppression hole separated from the magnet accommodation hole is plugged in the interpole portion inside the magnet accommodation hole so as to close the interpole core and overlap the magnet accommodation holes on both sides. The permanent magnet type motor according to claim 1 , wherein the permanent magnet type motor is provided. 前記第1のq軸磁束抑制穴の前記極間鉄心部と対向する部分の径方向長さと、前記第2のq軸磁束抑制穴の前記極間鉄心部と対向する部分の径方向長さの和を、前記磁石収容穴の径方向長さの1/3以上とし、且つ、前記空隙の径方向長さよりも大きくなるように構成したことを特徴とする請求項記載の永久磁石型モータ。 A radial length of a portion of the first q-axis magnetic flux suppression hole facing the inter-electrode core and a radial length of a portion of the second q-axis magnetic flux suppression hole facing the inter-electrode core. 6. The permanent magnet motor according to claim 5 , wherein the sum is set to be not less than 1/3 of the radial length of the magnet housing hole and larger than the radial length of the gap. 隣接する前記磁石収容穴の間に、前記磁石収容穴と分離した第3のq軸磁束抑制穴を設けたことを特徴とする請求項1乃至6のいずれかに記載の永久磁石型モータ。 The permanent magnet type motor according to any one of claims 1 to 6 , wherein a third q-axis magnetic flux suppression hole separated from the magnet accommodation hole is provided between the adjacent magnet accommodation holes. 前記第1のq軸磁束抑制穴と、前記第3のq軸磁束抑制穴とを連結して内側に凸形状の一体構造となるように構成したことを特徴とする請求項記載の永久磁石型モータ。 The permanent magnet according to claim 7, wherein the first q-axis magnetic flux suppression hole and the third q-axis magnetic flux suppression hole are connected to form an integrated structure having a convex shape inside. Type motor. 前記第2のq軸磁束抑制穴と、前記第3のq軸磁束抑制穴とを連結して外側に凸形状の一体構造となるように構成したことを特徴とする請求項記載の永久磁石型モータ。 The permanent magnet according to claim 7, wherein the second q-axis magnetic flux suppression hole and the third q-axis magnetic flux suppression hole are connected to form an integral structure having an outward convex shape. Type motor. 前記第1のq軸磁束抑制穴と、前記第2のq軸磁束抑制穴と、前記第3のq軸磁束抑制穴とを連結して一体構造としたことを特徴とする請求項記載の永久磁石型モータ。 Said first q-axis magnetic flux suppression holes, and the second q-axis magnetic flux suppression holes, according to claim 7, characterized in that an integral structure by connecting the third q-axis magnetic flux suppression hole Permanent magnet type motor. 前記磁石収容穴の外周側に位置する前記回転子鉄心に複数のスリットを径方向に配置したことを特徴とする請求項1乃至10のいずれかに記載の永久磁石型モータ。 The permanent magnet type motor according to any one of claims 1 to 10, wherein a plurality of slits are arranged in a radial direction in the rotor core positioned on the outer peripheral side of the magnet accommodation hole. 前記スリットを、該スリットの間隔が回転子外周側が小となるようハの字状に配置したことを特徴とする請求項11記載の永久磁石型モータ。 12. The permanent magnet type motor according to claim 11 , wherein the slits are arranged in a letter C shape such that the interval between the slits is small on the rotor outer peripheral side. 前記第1のq軸磁束抑制穴、または前記第2のq軸磁束抑制穴、または前記第3のq軸磁束抑制穴の少なくとも一つを、前記磁石収容穴側へ拡大することで、前記永久磁石収容穴の一部を前記永久磁石長さよりも小さくなるように構成した後、前記永久磁石を前記永久磁石収容穴へ圧入することにより、前記永久磁石を固定することを特徴とする請求項1乃至12のいずれかに記載の永久磁石型モータ。 By enlarging at least one of the first q-axis magnetic flux suppression hole, the second q-axis magnetic flux suppression hole, or the third q-axis magnetic flux suppression hole toward the magnet accommodation hole side, the permanent The permanent magnet is fixed by press-fitting the permanent magnet into the permanent magnet receiving hole after a part of the magnet receiving hole is configured to be smaller than the length of the permanent magnet. The permanent magnet type motor according to any one of 1 to 12 . 前記固定子鉄心の前記磁極ティースの内周面の両端部に前記空隙の長さが大きくなるようにカット面を形成したことを特徴とする請求項1乃至13のいずれかに記載の永久磁石型モータ。 Permanent magnet according to any one of claims 1 to 13, characterized by forming the inner peripheral surface cut surface so that the length of the gap at both end portions is increased in the magnetic pole teeth of the stator core motor. 密閉容器内に、冷媒を圧縮する圧縮要素と、この圧縮要素を駆動する電動要素とを備え、この電動要素に請求項1乃至14のいずれかに記載の永久磁石型モータを用いたことを特徴とする密閉型圧縮機。 A hermetic container is provided with a compression element for compressing the refrigerant and an electric element for driving the compression element, and the permanent magnet motor according to any one of claims 1 to 14 is used for the electric element. A hermetic compressor. 請求項1乃至14のいずれかに記載の永久磁石型モータを用いたことを特徴とするファンモータ。 Fan motor, characterized in that using a permanent magnet type motor according to any one of claims 1 to 14.
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