JP2010081754A - Permanent magnet rotary machine - Google Patents

Permanent magnet rotary machine Download PDF

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JP2010081754A
JP2010081754A JP2008248585A JP2008248585A JP2010081754A JP 2010081754 A JP2010081754 A JP 2010081754A JP 2008248585 A JP2008248585 A JP 2008248585A JP 2008248585 A JP2008248585 A JP 2008248585A JP 2010081754 A JP2010081754 A JP 2010081754A
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permanent magnet
rotor core
slots
rotor
slot
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Daishi Shimada
大志 島田
Hideo Hirose
英男 廣瀬
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet rotary machine that prevents the occurrence of noise or the like by preventing the backlash of each permanent magnet inside each slot formed in a rotor core. <P>SOLUTION: The permanent magnet rotary machine is configured as follows. A plurality of slots 13a-13h respectively for embedding each permanent magnet 15 into the inside of a rotor core 12 are formed in the rotor core 12 such that the number of slots per magnet pole becomes two or more. The permanent magnets 15 are provided one by one inside each of the slots 13a-13h. Each protrusion 17 protruding in the radial direction of the rotor core 12 is provided at both ends of each slot 13a-13h so as to be engaged with the end face 15a of each permanent magnet 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、永久磁石式回転機に関し、特に、回転子コアの内部に複数の永久磁石を有する永久磁石式回転機に関する。   The present invention relates to a permanent magnet type rotating machine, and more particularly to a permanent magnet type rotating machine having a plurality of permanent magnets inside a rotor core.

永久磁石式回転機には回転子コアの外周面に永久磁石を配設したものと回転子コアの内部に永久磁石を埋め込んだものとがあり、後者の永久磁石式回転機は、従来、図１９に示すような構造の回転子１１を備えて構成されている。
図１９に示される回転子１１は例えば透磁率の高い複数の鋼板を積層してなる回転子コア１２を有しており、この回転子コア１２の外周部には、ほぼ長方形状をなす複数のスロット１３が回転子コア１２の中心部に設けられた回転子軸１４を取り囲むように形成されている。これらのスロット１３は例えば回転子コア１２を形成する鋼板を所定の形状に打ち抜いて形成されており、各スロット１３内には、それぞれ永久磁石１５が磁極を回転子コア１２の径方向に向けて設けられている。 Permanent magnet type rotating machines include those in which permanent magnets are arranged on the outer peripheral surface of the rotor core and those in which permanent magnets are embedded inside the rotor core. A rotor 11 having a structure as shown in FIG. 19 is provided.
A rotor 11 shown in FIG. 19 has a rotor core 12 formed by laminating a plurality of steel plates having high permeability, for example, and the outer periphery of the rotor core 12 has a plurality of substantially rectangular shapes. A slot 13 is formed so as to surround a rotor shaft 14 provided at the center of the rotor core 12. These slots 13 are formed, for example, by punching a steel plate forming the rotor core 12 into a predetermined shape, and in each slot 13, permanent magnets 15 respectively direct the magnetic poles in the radial direction of the rotor core 12. Is provided.

このような回転子１１を備えた永久磁石式回転機は、永久磁石１５で発生した磁束が固定子の励磁コイル（図示せず）と鎖交する磁束量に応じて発生するマグネットトルクに加え、回転子コア１２の磁気抵抗を利用したリラクタンストルクを利用できるため、小型で高出力の回転機として広く用いられている。しかし、回転子１１の内部温度が過負荷などによって高くなると、スロット１３と永久磁石１５との間に充填された非磁性の接着剤が溶解し、接着剤による永久磁石１５の固定が不十分となるため、スロット１３内で永久磁石１５ががたつくことによって騒音などが発生するという問題が生じる。   In addition to the magnet torque generated according to the amount of magnetic flux that the magnetic flux generated by the permanent magnet 15 interlinks with the excitation coil (not shown) of the stator, Since reluctance torque using the magnetic resistance of the rotor core 12 can be used, it is widely used as a small, high-output rotating machine. However, when the internal temperature of the rotor 11 becomes high due to overload or the like, the nonmagnetic adhesive filled between the slot 13 and the permanent magnet 15 is dissolved, and the permanent magnet 15 is not sufficiently fixed by the adhesive. Therefore, there is a problem that noise or the like is generated when the permanent magnet 15 rattles in the slot 13.

また、回転子外周面１１ａと永久磁石１５との間の回転子コア外周部は、スロット１３の両端部と回転子外周面１１ａとの間に形成された二つの薄肉鉄心部１６（図１９参照）によって支えられているため、回転子１１の高速回転時に大きな遠心力が回転子コア外周部に作用すると、薄肉鉄心部１６が破損して永久磁石１５がスロット１３内から飛び出てしまうという問題もある。   Further, the rotor core outer peripheral portion between the rotor outer peripheral surface 11a and the permanent magnet 15 has two thin iron core portions 16 (see FIG. 19) formed between both ends of the slot 13 and the rotor outer peripheral surface 11a. ), When a large centrifugal force acts on the outer periphery of the rotor core when the rotor 11 rotates at a high speed, the thin iron core portion 16 is damaged and the permanent magnet 15 jumps out of the slot 13. is there.

そこで、かかる問題を解決するため、回転子コアに形成されたスロットの両端部に突起片を設け、これらの突起片を永久磁石側に折り曲げて永久磁石をスロット内に固定する技術や、スロットを永久磁石が挿入される磁石挿入部と該磁石挿入部の両端部に薄肉鉄心部を介して形成される二つの空隙部とで形成することによって、永久磁石をスロット内に堅固に固定すると共に薄肉鉄心部の破損を防ぐ技術などが提案されている（例えば、特許文献１及び特許文献２参照）。
特開２００１−２５８１８７号公報（００２４〜００２７、図３、図４） 特開２００７−１８１２５４号公報（００２８〜００３０、図１１） Therefore, in order to solve such a problem, there are provided a technique in which protrusions are provided at both ends of the slot formed in the rotor core, the protrusions are bent to the permanent magnet side, and the permanent magnet is fixed in the slot. The permanent magnet is firmly fixed in the slot and thin-walled by forming the magnet insertion portion into which the permanent magnet is inserted and two gap portions formed at both ends of the magnet insertion portion via the thin core portion. Techniques for preventing breakage of the iron core have been proposed (see, for example, Patent Document 1 and Patent Document 2).
JP 2001-258187 A (0024-0027, FIG. 3, FIG. 4) JP2007-181254 (0028-0030, FIG. 11)

しかしながら、特許文献１に記載された技術のように、スロットの両端部に設けた突起片を折り曲げて永久磁石をスロット内に固定すると、突起片の付け根部分にひずみが生じ、回転子コアの機械的強度が弱くなる。このため、突起片に大きな応力が高速回転時などに加わると、突起片が破損してしまい、永久磁石をスロット内に強固に固定して騒音などの発生を防止することができなくなるおそれがあった。   However, when the protruding pieces provided at both ends of the slot are bent and the permanent magnet is fixed in the slot as in the technique described in Patent Document 1, the root portion of the protruding piece is distorted, and the rotor core machine The target strength is weakened. For this reason, if a large stress is applied to the protruding piece during high-speed rotation, the protruding piece may be damaged, and it may not be possible to prevent the generation of noise by firmly fixing the permanent magnet in the slot. It was.

また、特許文献２に記載された技術では、薄肉鉄心部の数が増加することによって薄肉鉄心部を通過する漏れ磁束量が増大し、励磁コイルと鎖交する磁束量が減少するため、マグネットトルクの減少を招いてしまうという問題があった。
本発明は上述した問題点に鑑みてなされたものであり、回転子コアに形成されたスロット内での永久磁石のがたつきを抑制して騒音などの発生を防止することのできる永久磁石式回転機を提供することを目的とするものである。 Further, in the technique described in Patent Document 2, since the amount of leakage magnetic flux passing through the thin-walled iron core portion increases as the number of thin-walled iron core portions increases, the amount of magnetic flux interlinked with the exciting coil decreases, so that the magnet torque There was a problem of inviting a decrease.
The present invention has been made in view of the above-described problems, and is a permanent magnet type capable of preventing the occurrence of noise and the like by suppressing the rattling of the permanent magnet in the slot formed in the rotor core. The object is to provide a rotating machine.

上記課題を解決するため、請求項１記載の発明に係る永久磁石式回転機は、回転子コアの内部に複数の永久磁石を有する永久磁石式回転機において、前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２以上となるように前記回転子コアに形成し、前記永久磁石を前記スロット内に１個ずつ設けるとともに、前記回転子コアの径方向に突出して前記永久磁石の端面に係合する突起を前記スロットの両端部に設けたことを特徴とするものである。
請求項２記載の発明に係る永久磁石式回転機は、請求項１記載の永久磁石式回転機において、前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２個となるように前記回転子コアに形成したことを特徴とするものである。 In order to solve the above-mentioned problems, a permanent magnet type rotating machine according to the invention described in claim 1 is a permanent magnet type rotating machine having a plurality of permanent magnets inside a rotor core. A plurality of slots for embedding in the interior are formed in the rotor core such that the number of slots per magnetic pole is 2 or more, one permanent magnet is provided in each slot, and the diameter of the rotor core Protrusions that protrude in the direction and engage with the end faces of the permanent magnets are provided at both ends of the slot.
A permanent magnet type rotating machine according to a second aspect of the present invention is the permanent magnet type rotating machine according to the first aspect, wherein a plurality of slots for embedding the permanent magnet in the rotor core are slots per magnetic pole. The rotor core is formed so that the number is two.

請求項３記載の発明に係る永久磁石式回転機は、請求項１記載の永久磁石式回転機において、前記複数のスロットのうち互いに隣り合う二つのスロットが前記回転子コアの中心部に向けて略Ｖ字形状をなすように前記スロットが前記回転子コアに形成されていることを特徴ものである。
請求項４記載の発明に係る永久磁石式回転機は、請求項３記載の永久磁石式回転機において、前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２個となるように前記回転子コアに形成したことを特徴とするものである。 A permanent magnet rotating machine according to a third aspect of the present invention is the permanent magnet rotating machine according to the first aspect, wherein two slots adjacent to each other among the plurality of slots are directed toward the center of the rotor core. The slot is formed in the rotor core so as to form a substantially V shape.
A permanent magnet rotating machine according to a fourth aspect of the present invention is the permanent magnet rotating machine according to the third aspect, wherein a plurality of slots for embedding the permanent magnet in the rotor core are slots per magnetic pole. The rotor core is formed so that the number is two.

請求項１記載の発明に係る永久磁石式回転機によると、回転子コアの径方向に突出して永久磁石の端面に係合する突起をスロットの両端部に設けたことで、スロット内での永久磁石のがたつきが突起によって抑制される。これにより、回転子の内部温度が過負荷などによって高くなっても永久磁石がスロット内でがたつくことがないので、騒音などの発生を防止することができる。   According to the permanent magnet type rotating machine of the first aspect of the present invention, the protrusions that protrude in the radial direction of the rotor core and engage with the end faces of the permanent magnets are provided at both end portions of the slot, so The rattling of the magnet is suppressed by the protrusion. As a result, even if the internal temperature of the rotor increases due to overload or the like, the permanent magnet does not rattle in the slot, so that it is possible to prevent noise and the like from occurring.

また、スロットの両端部に設けた突起を磁石側に折り曲げる必要がなく、これにより、突起の付け根部分にひずみが生じることもないので、回転子コアの機械的強度が低下することを防止することができる。
さらに、１磁極当りのスロット数が２以上となるように複数のスロットを回転子コアに形成したことで、回転子外周面とスロットとの間の回転子コア外周部を支える薄肉鉄心部の数が増加し、これにより、回転子の高速回転時に大きな遠心力が回転子コア外周部に作用しても薄肉鉄心部が破損し難くなるので、回転子の高速回転時に薄肉鉄心部が破損して永久磁石がスロット内から飛び出てしまうことを防止することができる。 In addition, it is not necessary to bend the protrusions provided at both ends of the slot to the magnet side, thereby preventing distortion at the base of the protrusions, thereby preventing the mechanical strength of the rotor core from being lowered. Can do.
Furthermore, by forming a plurality of slots in the rotor core so that the number of slots per magnetic pole is 2 or more, the number of thin cores that support the outer periphery of the rotor core between the outer periphery of the rotor and the slots As a result, even if a large centrifugal force acts on the outer periphery of the rotor core during high-speed rotation of the rotor, the thin-walled iron core is less likely to be damaged. It is possible to prevent the permanent magnet from jumping out of the slot.

請求項２記載の発明に係る永久磁石式回転機によると、回転子コアの内部に永久磁石を埋め込むための複数のスロットを１磁極当りのスロット数が２個となるように回転子コアに形成したことで、スロットを永久磁石が挿入される磁石挿入部と該磁石挿入部の両端部に薄肉鉄心部を介して形成される二つの空隙部とで形成した場合のように、薄肉鉄心部を通過する漏れ磁束量によって固定子の励磁コイルと鎖交する磁束量が大きく減少することがないので、漏れ磁束量の増大によるマグネットトルクの減少を抑制することができる。   According to the permanent magnet type rotating machine of the second aspect of the invention, the rotor core is formed with a plurality of slots for embedding the permanent magnet in the rotor core so that the number of slots per magnetic pole is two. As a result, the thin core portion is formed as in the case where the slot is formed by a magnet insertion portion into which the permanent magnet is inserted and two gap portions formed at both ends of the magnet insertion portion via the thin core portion. Since the amount of magnetic flux passing through the stator does not greatly reduce the amount of magnetic flux interlinked with the exciting coil of the stator, a decrease in magnet torque due to an increase in the amount of magnetic flux leakage can be suppressed.

請求項３記載の発明に係る永久磁石式回転機によると、１磁極当りのスロット数が２以上のスロットを回転子軸に向けて略Ｖ字形状をなすように回転子コアに形成したことで、回転子コアの磁気抵抗差が大きくなり、これにより、リラクタンストルクが増大するとともに、磁束の流れを整流してトルクリプルの減少を図ることができる。
請求項４記載の発明に係る永久磁石式回転機によると、スロットを永久磁石が挿入される磁石挿入部と該磁石挿入部の両端部に薄肉鉄心部を介して形成される二つの空隙部とで形成した場合のように、薄肉鉄心部を通過する漏れ磁束量によって固定子の励磁コイルと鎖交する磁束量が大きく減少することがないので、漏れ磁束量の増大によるマグネットトルクの減少を抑制することができる。 According to the permanent magnet type rotating machine according to the third aspect of the present invention, the slots having two or more slots per magnetic pole are formed in the rotor core so as to form a substantially V shape toward the rotor shaft. The magnetic resistance difference of the rotor core increases, thereby increasing the reluctance torque and rectifying the flow of magnetic flux to reduce the torque ripple.
According to the permanent magnet type rotating machine according to the invention of claim 4, the slot has a magnet insertion part into which the permanent magnet is inserted, and two gaps formed at both ends of the magnet insertion part via the thin core part. The amount of magnetic flux interlinked with the stator exciting coil is not greatly reduced by the amount of magnetic flux leaking through the thin-walled iron core, as in can do.

図１は、本発明の第１実施形態に係る永久磁石式回転機の回転子を示す断面図である。図１に示されるように、第１実施形態に係る永久磁石式回転機の回転子１１は、例えば透磁率の高い複数の鋼板を積層してなる回転子コア１２を有しており、この回転子コア１２の外周部には、ほぼ長方形状をなす複数のスロット１３ａ，１３ｂ，１３ｃ，１３ｄ，１３ｅ，１３ｆ，１３ｇ，１３ｈが回転子コア１２の中心部に設けられた回転子軸１４を取り囲むように形成されている。   FIG. 1 is a cross-sectional view showing a rotor of a permanent magnet type rotating machine according to a first embodiment of the present invention. As shown in FIG. 1, the rotor 11 of the permanent magnet type rotating machine according to the first embodiment has a rotor core 12 formed by laminating a plurality of steel plates having high permeability, for example. A plurality of slots 13 a, 13 b, 13 c, 13 d, 13 e, 13 f, 13 g, and 13 h having a substantially rectangular shape surround the rotor shaft 14 provided at the center of the rotor core 12 at the outer peripheral portion of the child core 12. It is formed as follows.

スロット１３ａ〜１３ｈは回転子外周面１１ａとの間に薄肉鉄心部１６が形成されるように回転子コア１２に形成されており、各スロット１３ａ〜１３ｈ内には、平板形状をなす永久磁石１５が磁極を回転子コア１２の径方向に向けて１個ずつ設けられている。また、スロット１３ａ〜１３ｈは１磁極当りのスロット数が２個となるように回転子コア１２に形成されており、これらのスロット１３ａ〜１３ｈのうち互いに隣り合う二つのスロット間（例えばスロット１３ａ，１３ｂ間、スロット１３ｃ，１３ｄ間、スロット１３ｅ，１３ｆ間、スロット１３ｇ，１３ｈ間）には、それぞれ薄肉鉄心部１６が形成されている。   The slots 13a to 13h are formed in the rotor core 12 so that a thin iron core portion 16 is formed between the rotor outer peripheral surface 11a, and the flat magnets 15 are formed in the slots 13a to 13h. Are provided one by one with the magnetic poles directed in the radial direction of the rotor core 12. The slots 13a to 13h are formed in the rotor core 12 so that the number of slots per magnetic pole is two. Among the slots 13a to 13h, two slots adjacent to each other (for example, the slots 13a and 13h). 13b, between the slots 13c and 13d, between the slots 13e and 13f, and between the slots 13g and 13h), a thin iron core portion 16 is formed.

永久磁石１５はスロット１３ａ〜１３ｈの両端側に端面１５ａを有しており、これらの永久磁石１５が挿入されるスロット１３ａ〜１３ｈの両端部には、突起１７がそれぞれ設けられている。これらの突起１７は回転子コア１２の外径方向に突出しており、各突起１７は永久磁石１５の端面１５ａと係合している。
上述のように、回転子コア１２の外径方向に突出して永久磁石１５の端面１５ａと係合する突起１７をスロット１３ａ〜１３ｈの両端部に設けると、スロット１３ａ〜１３ｈ内での永久磁石１５のがたつきが突起１７によって抑制される。これにより、回転子１１の内部温度が過負荷などによって高くなっても永久磁石１５がスロット１３ａ〜１３ｈ内でがたつくことがないので、騒音などの発生を防止することができる。 The permanent magnet 15 has end faces 15a at both ends of the slots 13a to 13h, and protrusions 17 are provided at both ends of the slots 13a to 13h into which the permanent magnets 15 are inserted. These protrusions 17 protrude in the outer diameter direction of the rotor core 12, and each protrusion 17 is engaged with the end face 15 a of the permanent magnet 15.
As described above, when the protrusions 17 that protrude in the outer diameter direction of the rotor core 12 and engage with the end face 15a of the permanent magnet 15 are provided at both ends of the slots 13a to 13h, the permanent magnet 15 in the slots 13a to 13h. The rattling is suppressed by the protrusion 17. Thereby, even if the internal temperature of the rotor 11 becomes high due to overload or the like, the permanent magnet 15 does not rattle in the slots 13a to 13h, so that it is possible to prevent the generation of noise and the like.

また、スロット１３ａ〜１３ｈの両端部に設けた突起１７を磁石側に折り曲げる必要がなく、これにより、突起１７の付け根部分にひずみが生じることもないので、回転子コア１２の機械的強度が低下することを防止することができる。
さらに、１磁極当りのスロット数が２個となるようにスロット１３ａ〜１３ｈを回転子コア１２に形成したことで、回転子外周面１１ａとスロット１３ａ〜１３ｈとの間の回転子コア外周部を支える薄肉鉄心部１６の数が増加する。これにより、回転子１１の高速回転時に大きな遠心力が回転子コア外周部に作用しても薄肉鉄心部１６が破損し難くなるので、回転子１１の高速回転時に薄肉鉄心部１６が破損して永久磁石１５がスロット１３ａ〜１３ｈ内から飛び出てしまうことを防止することができる。 Further, it is not necessary to bend the protrusions 17 provided at both ends of the slots 13a to 13h to the magnet side, and thus the base portion of the protrusions 17 is not distorted, so that the mechanical strength of the rotor core 12 is reduced. Can be prevented.
Furthermore, by forming the slots 13a to 13h in the rotor core 12 so that the number of slots per magnetic pole is two, the outer periphery of the rotor core between the rotor outer peripheral surface 11a and the slots 13a to 13h is reduced. The number of the thin-walled iron core parts 16 to support increases. As a result, even if a large centrifugal force acts on the outer periphery of the rotor core when the rotor 11 rotates at high speed, the thin iron core portion 16 is not easily damaged. Therefore, the thin iron core portion 16 is damaged when the rotor 11 rotates at high speed. It is possible to prevent the permanent magnet 15 from jumping out of the slots 13a to 13h.

また、スロットを永久磁石が挿入される磁石挿入部と該磁石挿入部の両端部に薄肉鉄心部を介して形成される二つの空隙部とで形成した場合のように、薄肉鉄心部１６を通過する漏れ磁束量によって固定子の励磁コイルと鎖交する磁束量が大きく減少することがないので、漏れ磁束量の増大によるマグネットトルクの減少を抑制することができる。
図１に示した第１実施形態では、回転子の回転子コアとして透磁率の高い複数の鋼板を積層してなるものを例示したが、これに限られるものではなく、回転子コアは例えば磁性鉄粉を所定の形状に成形してなるものであってもよい。 Further, the slot passes through the thin core portion 16 as in the case where the slot is formed by the magnet insertion portion into which the permanent magnet is inserted and two gap portions formed through the thin core portion at both ends of the magnet insertion portion. The amount of magnetic flux linked to the exciting coil of the stator is not greatly reduced by the amount of magnetic flux leaked, so that a decrease in magnet torque due to an increase in the amount of magnetic flux leakage can be suppressed.
In the first embodiment shown in FIG. 1, the rotor core of the rotor is exemplified by laminating a plurality of steel plates having high magnetic permeability. However, the present invention is not limited to this, and the rotor core is, for example, magnetic. It may be formed by molding iron powder into a predetermined shape.

また、図１に示した第１実施形態では、複数のスロットを１磁極当りのスロット数が２個となるように回転子コアに形成したが、これに限られるものではなく、１磁極当りのスロット数が２個以上となるように複数のスロットを回転子コアに形成してもよい。
さらに、図１に示した第１実施形態では、スロットの両端部に設けられる突起として回転子コアの外径方向に突出するものを例示したが、これに限られるものではない。例えば、図２に示す第２実施形態や図４に示す第４実施形態のように、各スロットの両端部に設けられる二つの突起１７のうち一方の突起１７を回転子コア１２の外径方向に突出させ、他方の突起１７を回転子コア１２の内径方向に突出させてもよいし、あるいは図３に示す第３実施形態のように、回転子コア１２の内径方向に突出する突起１７を各スロットの両端部に設けてもよい。 In the first embodiment shown in FIG. 1, the plurality of slots are formed in the rotor core so that the number of slots per magnetic pole is two. However, the present invention is not limited to this, and the number of slots per magnetic pole is not limited to this. A plurality of slots may be formed in the rotor core so that the number of slots is two or more.
Furthermore, in 1st Embodiment shown in FIG. 1, although what protruded in the outer-diameter direction of a rotor core was illustrated as a protrusion provided in the both ends of a slot, it is not restricted to this. For example, as in the second embodiment shown in FIG. 2 and the fourth embodiment shown in FIG. 4, one of the two protrusions 17 provided at both ends of each slot is formed in the outer diameter direction of the rotor core 12. The other protrusion 17 may protrude in the inner diameter direction of the rotor core 12, or the protrusion 17 protruding in the inner diameter direction of the rotor core 12 as in the third embodiment shown in FIG. You may provide in the both ends of each slot.

図１〜図４に示した各実施形態では、回転子コアの径方向に突出する突起を各スロットの両端部に１個ずつ設けたものを示したが、これに限られるものではない。例えば、図５〜図８に示す第５乃至第８の実施形態のように、各スロットの両端部に設けられる突起１７の数は３個であってもよいし、あるいは図９に示す第９実施形態のように、各スロット１３の両端部に突起１７を２個ずつ設けてもよい。   In each of the embodiments shown in FIGS. 1 to 4, one protrusion is provided at each end of each slot that protrudes in the radial direction of the rotor core. However, the present invention is not limited to this. For example, as in the fifth to eighth embodiments shown in FIGS. 5 to 8, the number of protrusions 17 provided at both ends of each slot may be three, or the number of protrusions 17 shown in FIG. As in the embodiment, two protrusions 17 may be provided at both ends of each slot 13.

図１０は本発明の第１０実施形態に係る永久磁石式回転機の回転子を示す断面図であり、この第１０実施形態が第１実施形態と異なる点は、スロット１３ａ〜１３ｈのうち薄肉鉄心部１６を介して隣り合う二つのスロット（例えば、スロット１３ａとスロット１３ｂ、スロット１３ｃとスロット１３ｄ、スロット１３ｅとスロット１３ｆ、スロット１３ｇとスロット１３ｈ）が回転子コア１２の中心部に向けて略Ｖ字形状をなすように、スロット１３ａ〜１３ｈを回転子コア１２に形成した点である。   FIG. 10 is a cross-sectional view showing a rotor of a permanent magnet type rotating machine according to the tenth embodiment of the present invention. The tenth embodiment is different from the first embodiment in that the thin-walled iron core among the slots 13a to 13h. Two slots (for example, slot 13a and slot 13b, slot 13c and slot 13d, slot 13e and slot 13f, slot 13g and slot 13h) that are adjacent to each other through the portion 16 are substantially V toward the center of the rotor core 12. The slots 13a to 13h are formed in the rotor core 12 so as to form a letter shape.

このように、薄肉鉄心部１６を介して隣り合う二つのスロットが回転子コア１２の中心部に向けて略Ｖ字形状をなすように、複数のスロット１３ａ〜１３ｈを回転子コア１２に形成すると、回転子コア１２の磁気抵抗差が大きくなる。これにより、リラクタンストルクが増大するとともに、磁束の流れを整流してトルクリプルの減少を図ることができる。   As described above, when the plurality of slots 13 a to 13 h are formed in the rotor core 12 such that two slots adjacent to each other through the thin core portion 16 form a substantially V shape toward the center of the rotor core 12. The magnetic resistance difference of the rotor core 12 is increased. Thereby, while reluctance torque increases, the flow of magnetic flux can be rectified to reduce torque ripple.

図１０に示した第１０実施形態では、スロットの両端部に設けられる突起として回転子コアの外径方向に突出するものを例示したが、これに限られるものではない。例えば、図１１に示す第１１実施形態や図１３に示す第１３実施形態のように、各スロットの両端部に設けられる二つの突起１７のうち一方の突起１７を回転子コア１２の外径方向に突出させ、他方の突起１７を回転子コア１２の内径方向に突出させてもよいし、あるいは図１２に示す第１２実施形態のように、回転子コア１２の内径方向に突出する突起１７を各スロットの両端部に設けてもよい。   In the tenth embodiment shown in FIG. 10, the protrusions provided at both ends of the slot are illustrated as protruding in the outer diameter direction of the rotor core. However, the present invention is not limited to this. For example, as in the eleventh embodiment shown in FIG. 11 and the thirteenth embodiment shown in FIG. 13, one of the two protrusions 17 provided at both ends of each slot is formed in the outer diameter direction of the rotor core 12. The other protrusion 17 may protrude in the inner diameter direction of the rotor core 12, or the protrusion 17 protruding in the inner diameter direction of the rotor core 12 as in the twelfth embodiment shown in FIG. You may provide in the both ends of each slot.

図１０〜図１３に示した各実施形態では、回転子コアの径方向に突出する突起を各スロットの両端部に１個ずつ設けたものを示したが、これに限られるものではない。例えば、図１４〜図１７に示す第１４乃至第１７の実施形態のように、各スロットの両端部に設けられる突起１７の数は３個であってもよいし、あるいは図１８に示す第１８実施形態のように、各スロットの両端部に突起１７を２個ずつ設けてもよい。   In each of the embodiments shown in FIGS. 10 to 13, one protrusion is provided at each end of each slot that protrudes in the radial direction of the rotor core. However, the present invention is not limited to this. For example, as in the fourteenth to seventeenth embodiments shown in FIGS. 14 to 17, the number of protrusions 17 provided at both ends of each slot may be three, or the eighteenth embodiment shown in FIG. As in the embodiment, two protrusions 17 may be provided at both ends of each slot.

本発明の第１実施形態に係る永久磁石式回転機の回転子を示す断面図である。It is sectional drawing which shows the rotor of the permanent-magnet-type rotary machine which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet type rotary machine which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 5th Embodiment of this invention. 本発明の第６実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet type rotary machine which concerns on 6th Embodiment of this invention. 本発明の第７実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 7th Embodiment of this invention. 本発明の第８実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 8th Embodiment of this invention. 本発明の第９実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet type rotary machine which concerns on 9th Embodiment of this invention. 本発明の第１０実施形態に係る永久磁石式回転機の回転子を示す断面図である。It is sectional drawing which shows the rotor of the permanent-magnet-type rotary machine which concerns on 10th Embodiment of this invention. 本発明の第１１実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet type rotary machine which concerns on 11th Embodiment of this invention. 本発明の第１２実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 12th Embodiment of this invention. 本発明の第１３実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 13th Embodiment of this invention. 本発明の第１４実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet-type rotary machine which concerns on 14th Embodiment of this invention. 本発明の第１５実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 15th Embodiment of this invention. 本発明の第１６実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet type rotary machine which concerns on 16th Embodiment of this invention. 本発明の第１７実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent-magnet-type rotary machine which concerns on 17th Embodiment of this invention. 本発明の第１８実施形態に係る永久磁石式回転機の回転子の一部を示す断面図である。It is sectional drawing which shows a part of rotor of the permanent magnet-type rotary machine which concerns on 18th Embodiment of this invention. 従来の永久磁石式回転機の回転子の一例を示す断面図である。It is sectional drawing which shows an example of the rotor of the conventional permanent magnet type rotary machine.

符号の説明Explanation of symbols

１１ 回転子
１２ 回転子コア
１３，１３ａ〜１３ｈ スロット
１４ 回転子軸
１５ 永久磁石
１６ 薄肉鉄心部
１７ 突起 DESCRIPTION OF SYMBOLS 11 Rotor 12 Rotor core 13, 13a-13h Slot 14 Rotor shaft 15 Permanent magnet 16 Thin core part 17 Protrusion

Claims (4)

回転子コアの内部に複数の永久磁石を有する永久磁石式回転機において、
前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２以上となるように前記回転子コアに形成し、前記永久磁石を前記スロット内に１個ずつ設けるとともに、前記回転子コアの径方向に突出して前記永久磁石の端面に係合する突起を前記スロットの両端部に設けたことを特徴とする永久磁石式回転機。 In the permanent magnet type rotating machine having a plurality of permanent magnets inside the rotor core,
A plurality of slots for embedding the permanent magnet in the rotor core are formed in the rotor core so that the number of slots per magnetic pole is 2 or more, and one permanent magnet is provided in the slot. A permanent magnet type rotating machine characterized in that a protrusion that protrudes in the radial direction of the rotor core and engages with an end face of the permanent magnet is provided at both ends of the slot. 請求項１記載の永久磁石式回転機において、前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２個となるように前記回転子コアに形成したことを特徴とする永久磁石式回転機。   2. The permanent magnet type rotating machine according to claim 1, wherein a plurality of slots for embedding the permanent magnets in the rotor core are formed in the rotor core so that the number of slots per magnetic pole is two. A permanent magnet type rotating machine. 請求項１記載の永久磁石式回転機において、前記複数のスロットのうち互いに隣り合う二つのスロットが前記回転子コアの中心部に向けて略Ｖ字形状をなすように前記スロットが前記回転子コアに形成されていることを特徴とする永久磁石式回転機。   2. The permanent magnet type rotating machine according to claim 1, wherein two slots adjacent to each other among the plurality of slots are substantially V-shaped toward a central portion of the rotor core. 3. A permanent magnet type rotating machine characterized in that it is formed. 請求項３記載の永久磁石式回転機において、前記永久磁石を前記回転子コアの内部に埋め込むための複数のスロットを１磁極当りのスロット数が２個となるように前記回転子コアに形成したことを特徴とする永久磁石式回転機。   4. The permanent magnet type rotating machine according to claim 3, wherein a plurality of slots for embedding the permanent magnets in the rotor core are formed in the rotor core so that the number of slots per magnetic pole is two. A permanent magnet type rotating machine.
JP2008248585A 2008-09-26 2008-09-26 Permanent magnet rotary machine Pending JP2010081754A (en)

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