JP2017195690A - Rotor structure in outer rotor type multipole generator - Google Patents

Rotor structure in outer rotor type multipole generator Download PDF

Info

Publication number
JP2017195690A
JP2017195690A JP2016083979A JP2016083979A JP2017195690A JP 2017195690 A JP2017195690 A JP 2017195690A JP 2016083979 A JP2016083979 A JP 2016083979A JP 2016083979 A JP2016083979 A JP 2016083979A JP 2017195690 A JP2017195690 A JP 2017195690A
Authority
JP
Japan
Prior art keywords
yoke
hub
rotor
inner peripheral
peripheral surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2016083979A
Other languages
Japanese (ja)
Inventor
学 須田
Manabu Suda
学 須田
哲生 森永
Tetsuo Morinaga
哲生 森永
貴広 菅井
Takahiro Sugai
貴広 菅井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sawafuji Electric Co Ltd
Original Assignee
Sawafuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sawafuji Electric Co Ltd filed Critical Sawafuji Electric Co Ltd
Priority to JP2016083979A priority Critical patent/JP2017195690A/en
Priority to PCT/JP2017/011430 priority patent/WO2017183378A1/en
Publication of JP2017195690A publication Critical patent/JP2017195690A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a rotor structure which facilitates centering of a yoke while achieving weight saving in an outer rotor type multipole generator including a fixed stator; and a rotor provided with a plurality of permanent magnets on an inner circumferential surface of a yoke made of a magnetic material coaxially surrounding the stator to form a cylindrical shape and connected to a drive shaft.SOLUTION: A hub 20 connected to a drive shaft 14 and a cylindrical portion 21 having one end connected to the hub 20 are integrally formed of a nonmagnetic material and a yoke 22A is fixed to the inner peripheral surface of the cylindrical portion 21.SELECTED DRAWING: Figure 1

Description

本発明は、固定のステータと、該ステータを同軸に囲繞して円筒状に形成されるとともに駆動軸に連結される磁性材料製のヨークの内周面に複数の永久磁石が設けられるロータとを備えるアウターロータ型多極発電機に関し、特にロータ構造の改良に関する。   The present invention includes a fixed stator, and a rotor which is formed in a cylindrical shape coaxially surrounding the stator and has a plurality of permanent magnets provided on an inner peripheral surface of a yoke made of a magnetic material connected to a drive shaft. The present invention relates to an outer rotor type multipolar generator provided, and more particularly to improvement of a rotor structure.

このようなアウターロータ型多極発電機は、特許文献１等で既に知られており、このものでは、アルミニウム等の軽合金によってダイカスト成形されて駆動軸に連結される端壁部材と、たとえば軟鋼によってステータを同軸に覆う円筒状に形成されて前記端壁部材の外周部に一端部が固着されるとともに内周に複数の永久磁石が固着されるヨークとで、ロータが構成されている。   Such an outer rotor type multipolar generator is already known from Patent Document 1 and the like, and in this case, an end wall member that is die-cast by a light alloy such as aluminum and connected to a drive shaft, for example, mild steel Thus, the rotor is configured by a yoke that is coaxially formed to cover the stator and has one end fixed to the outer periphery of the end wall member and a plurality of permanent magnets fixed to the inner periphery.

特開２００４−１２０８４８号公報JP 2004-120848 A

上記特許文献１で開示されるものでは、駆動軸に連結される端壁部材に、その端壁部材とは別部材である円筒状のヨークが固着される構造のため、端壁部材の中心軸線と、ヨークの中心軸線とを合致させる「芯出し」が難しい。そこで端壁部材およびヨークを軟鉄によって一体に形成すれば「芯出し」が容易となるが、軟鉄の絞り加工で端壁部材およびヨークを一体に形成するのは難しく、また重量が大きくなってしまう。   In what is disclosed in Patent Document 1 described above, a cylindrical yoke, which is a member different from the end wall member, is fixed to the end wall member connected to the drive shaft. It is difficult to “center” to match the central axis of the yoke. Therefore, if the end wall member and the yoke are integrally formed of soft iron, “centering” is facilitated. However, it is difficult to form the end wall member and the yoke integrally by drawing the soft iron, and the weight is increased. .

本発明は、かかる事情に鑑みてなされたものであり、軽量化を図りつつヨークの芯出しを容易としたアウターロータ型多極発電機におけるロータ構造を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rotor structure in an outer rotor type multipolar generator that facilitates centering of a yoke while reducing the weight.

上記目的を達成するために、本発明は、固定のステータと、該ステータを同軸に囲繞して円筒状に形成されるとともに駆動軸に連結される磁性材料製のヨークの内周面に複数の永久磁石が設けられるロータとを備えるアウターロータ型多極発電機において、前記駆動軸に連結されるハブと、該ハブに一端部が連なる円筒部とが非磁性材料で一体に形成され、前記円筒部の内周面に前記ヨークが固着されることを第１の特徴とする。   In order to achieve the above object, the present invention provides a fixed stator and a plurality of magnetic material yokes that are formed in a cylindrical shape coaxially surrounding the stator and coupled to a drive shaft. In an outer rotor multipolar generator comprising a rotor provided with a permanent magnet, a hub connected to the drive shaft and a cylindrical portion having one end connected to the hub are integrally formed of a nonmagnetic material, and the cylinder The first feature is that the yoke is fixed to the inner peripheral surface of the portion.

また本発明は、第１の特徴の構成に加えて、前記ハブおよび前記円筒部が、樹脂から成ることを第２の特徴とする。   In addition to the configuration of the first feature, the second feature of the present invention is that the hub and the cylindrical portion are made of resin.

本発明は、第１の特徴の構成に加えて、前記ハブおよび前記円筒部が、軽金属から成ることを第３の特徴とする。   The third feature of the present invention is that, in addition to the configuration of the first feature, the hub and the cylindrical portion are made of a light metal.

本発明は、第１の特徴の構成に加えて、前記ヨークが、鉄管から成ることを第４の特徴とする。   The fourth feature of the present invention is that, in addition to the configuration of the first feature, the yoke is made of an iron pipe.

本発明は、第１の特徴の構成に加えて、前記ヨークは、磁性金属製の帯板が複数回もしくは１回だけ巻回されて成ることを第５の特徴とする。   In addition to the configuration of the first feature, the present invention has a fifth feature that the yoke is formed by winding a magnetic metal strip a plurality of times or only once.

本発明は、第１の特徴の構成に加えて、前記ヨークは、磁性金属製の帯板が螺旋状に巻回されて成ることを第６の特徴とする。   In addition to the configuration of the first feature, the present invention has a sixth feature that the yoke is formed by winding a magnetic metal strip in a spiral shape.

本発明は、第１の特徴の構成に加えて、前記ヨークは、磁性金属製の線材が螺旋状に巻回されて成ることを第７の特徴とする。   In addition to the structure of the first feature, the present invention has a seventh feature that the yoke is formed by winding a magnetic metal wire in a spiral shape.

さらに本発明は、第１〜第７の特徴の構成のいずれかに加えて、前記永久磁石が、射出成形で前記ヨークの内周面にモールド結合される樹脂ボンド永久磁石であることを第８の特徴とする。   Further, according to the present invention, in addition to any of the first to seventh features, the permanent magnet is a resin-bonded permanent magnet that is molded and bonded to the inner peripheral surface of the yoke by injection molding. It is characterized by.

本発明の上記特徴によれば、駆動軸に連結されるハブと、内周面に円筒状のヨークが設けられる円筒部とが非磁性材料で一体に形成されるので、ハブの中心軸線と、円筒部の内周面の中心軸線とを合致させることは容易であり、ヨークの芯出しを容易としつつ、ヨークの肉厚を薄くしてロータの軽量化を図ることができる。   According to the above feature of the present invention, the hub connected to the drive shaft and the cylindrical portion provided with the cylindrical yoke on the inner peripheral surface are integrally formed of a non-magnetic material. It is easy to match the central axis of the inner peripheral surface of the cylindrical portion, and the yoke can be easily centered, and the thickness of the yoke can be reduced to reduce the weight of the rotor.

また特に第２の特徴によれば、ハブおよび円筒部が樹脂から成り、特に第３の特徴によれば、ハブおよび円筒部が軽金属から成るので、ロータをより軽量化することができる。   In particular, according to the second feature, the hub and the cylindrical portion are made of resin, and particularly according to the third feature, the hub and the cylindrical portion are made of light metal, so that the rotor can be further reduced in weight.

さらに特に第８の特徴の構成によれば、射出成形される樹脂ボンド永久磁石をヨークの内周面にモールド結合することで、より軽量化を図るとともに、ハブの中心軸線と、永久磁石の内周面の中心軸線とを合致させることが容易となり、ヨークの芯出しが容易となるので永久磁石の組付けを容易とすることができる。   In particular, according to the configuration of the eighth feature, the resin-bonded permanent magnet to be injection-molded is molded and bonded to the inner peripheral surface of the yoke, so that the weight can be further reduced, and the center axis of the hub and the inner portion of the permanent magnet can be reduced. It is easy to match the central axis of the peripheral surface, and the centering of the yoke is facilitated, so that the permanent magnet can be easily assembled.

第１の実施の形態のアウターロータ型多極発電機の縦断面図である。It is a longitudinal cross-sectional view of the outer rotor type | mold multipolar generator of 1st Embodiment. 図１の２−２線断面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG. ロータの分解斜視図である。It is a disassembled perspective view of a rotor. 樹脂ボンド永久磁石の射出成形装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the injection molding apparatus of the resin bond permanent magnet. 第２の実施の形態を示すもので（ａ）はロータの縦断面図、（ｂ）はヨークの斜視図である。The second embodiment is shown, in which (a) is a longitudinal sectional view of a rotor and (b) is a perspective view of a yoke. 第３の実施の形態を示すもので（ａ）はロータの縦断面図、（ｂ）はヨークの斜視図である。The third embodiment is shown, in which (a) is a longitudinal sectional view of a rotor and (b) is a perspective view of a yoke. 第４の実施の形態を示すもので（ａ）はロータの縦断面図、（ｂ）はヨークの斜視図である。4A and 4B show a fourth embodiment, in which FIG. 4A is a longitudinal sectional view of a rotor, and FIG. 4B is a perspective view of a yoke. 第４の実施の形態を示すもので（ａ）はロータの縦断面図、（ｂ）はヨークの斜視図である。4A and 4B show a fourth embodiment, in which FIG. 4A is a longitudinal sectional view of a rotor, and FIG. 4B is a perspective view of a yoke.

以下、本発明の実施の形態について添付の図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

本発明の第１の実施の形態について図１〜図４を参照しながら説明すると、先ず図１において、このアウターロータ型多極発電機は、たとえばエンジン発電機として用いられるものであり、エンジン本体１１に設けられる中空の支持部１１ａに固定されるステータ１２と、そのステータ１２を覆うロータ１３とを備え、前記ステータ１２と同軸に配置される駆動軸としてのクランクシャフト１４の端部にロータ１３が固定される。   The first embodiment of the present invention will be described with reference to FIGS. 1 to 4. First, in FIG. 1, this outer rotor type multipolar generator is used as an engine generator, for example. 11 is provided with a stator 12 fixed to a hollow support portion 11 a provided on the rotor 11 and a rotor 13 covering the stator 12. Is fixed.

図２を併せて参照して、前記ステータ１２は、複数枚の磁性鋼板が積層、結合されて成るリング状のステータコア１５と、該ステータコア１５に装着される合成樹脂製のボビン１６と、該ボビン１６に巻装されるコイル１７とを備える。   Referring also to FIG. 2, the stator 12 includes a ring-shaped stator core 15 formed by laminating and joining a plurality of magnetic steel plates, a synthetic resin bobbin 16 attached to the stator core 15, and the bobbin. 16 and a coil 17 wound around 16.

前記ステータコア１５の外周の周方向に等間隔をあけた複数箇所には略Ｔ字状の突極１５ａが突設されており、前記ボビン１６は、前記突極１５ａの先端部ならびに前記ステータコア１５の両端面の一部および内周面を露出させるようにしてステータコア１５を覆うように形成されており、前記突極１５ａに対応する部分で前記ボビン１６に前記コイル１７が巻装される。   Substantially T-shaped salient poles 15a are provided at a plurality of locations spaced at equal intervals in the circumferential direction of the outer circumference of the stator core 15, and the bobbin 16 is connected to the tip of the salient pole 15a and the stator core 15. The stator core 15 is formed so as to expose a part of both end surfaces and the inner peripheral surface, and the coil 17 is wound around the bobbin 16 at a portion corresponding to the salient pole 15a.

前記ステータコア１５の周方向に間隔をあけた複数箇所で前記ステータコア１５の内周部には、挿通孔１８が設けられており、それらの挿通孔１８に挿通されるボルト１９を前記支持部１１ａに螺合して締め付けることによって前記ステータ１２が前記支持部１１ａに固定される。   Insertion holes 18 are provided in the inner peripheral portion of the stator core 15 at a plurality of locations spaced in the circumferential direction of the stator core 15, and bolts 19 inserted through the insertion holes 18 are provided in the support portion 11a. The stator 12 is fixed to the support portion 11a by screwing and tightening.

図３を併せて参照して、前記ロータ１３は、前記クランクシャフト１４に連結されるハブ２０と、該ハブ２０に一端部が一体に連なる円筒部２１と、その円筒部２１の内周面に固着される円筒状のヨーク２２Ａと、該ヨーク２２Ａの内周面に設けられる複数の永久磁石２３とで構成される。   Referring also to FIG. 3, the rotor 13 includes a hub 20 connected to the crankshaft 14, a cylindrical portion 21 having one end integrally connected to the hub 20, and an inner peripheral surface of the cylindrical portion 21. A cylindrical yoke 22A to be fixed and a plurality of permanent magnets 23 provided on the inner peripheral surface of the yoke 22A.

前記ハブ２０および前記円筒部２１は、非磁性材料たとえば樹脂によって一体に形成される。前記ヨーク２２Ａは、磁性材料により円筒状に形成されるものであり、この第１の実施の形態では、鉄管である前記ヨーク２２Ａが前記円筒部２１の内周面に圧入によって固着される。   The hub 20 and the cylindrical portion 21 are integrally formed of a nonmagnetic material such as resin. The yoke 22A is formed in a cylindrical shape from a magnetic material. In the first embodiment, the yoke 22A, which is an iron pipe, is fixed to the inner peripheral surface of the cylindrical portion 21 by press fitting.

前記ハブ２０は、前記クランクシャフト１４の端部が挿通、固着される円筒状の支持筒部２０ａと、その支持筒部２０ａを同軸に囲繞するリング部２０ｂと、前記支持筒部２０ａから放射状に延びて前記リング部２０ｂに連設される複数個たとえば４個の連結部２０ｃとを一体に有するものであり、前記リング部２０ｂに前記円筒部２１が同軸にかつ一体に連なるように形成される。   The hub 20 has a cylindrical support tube portion 20a into which the end portion of the crankshaft 14 is inserted and fixed, a ring portion 20b coaxially surrounding the support tube portion 20a, and a radial shape from the support tube portion 20a. A plurality of, for example, four connecting portions 20c that extend and are continuously connected to the ring portion 20b are integrally formed, and the cylindrical portion 21 is coaxially and integrally connected to the ring portion 20b. .

前記支持筒部２０ａは、前記エンジン本体１１とは反対側の端部を小径端としたテーパ状の取付け孔２４を同軸に有しており、前記クランクシャフト１４の端部には、前記取付け孔２４に嵌合されるテーパ部１４ａが形成される。前記支持筒部２０ａと、該支持筒部２０ａの前記テーパ孔２４に嵌合される前記クランクシャフト１４の前記テーパ部１４ａとの間には、クランクシャフト１４に対する支持筒部２０ａすなわちハブ２０の相対回転を阻止するためのキー２５が嵌入されており、前記支持筒部２０ａの前記エンジン本体１１とは反対側の端面に当接、係合される拡径頭部２６ａを有するボルト２６が前記クランクシャフト１４の端部に螺合される。   The support cylinder 20a has a coaxial mounting hole 24 having a small diameter end at the end opposite to the engine body 11, and the end of the crankshaft 14 has the mounting hole at the end. A taper portion 14a to be fitted to 24 is formed. Between the support cylinder part 20a and the taper part 14a of the crankshaft 14 fitted in the taper hole 24 of the support cylinder part 20a, the support cylinder part 20a, that is, the hub 20 is relatively located with respect to the crankshaft 14. A key 25 for preventing rotation is inserted, and a bolt 26 having an enlarged head portion 26a that comes into contact with and engages with the end surface of the support cylinder portion 20a opposite to the engine body 11 is connected to the crank. Screwed into the end of the shaft 14.

複数の前記永久磁石２３は、一連につながって一体となっている樹脂ボンド永久磁石であり、その外周側および内周側でＮ極およびＳ極に分極されるとともに、分極された極の極性が前記ヨーク２２Ａの周方向で隣接する極同士では前記外周側および前記内周側で異なるようにしつつ全体としてリング状になるように、前記ヨーク２２Ａの内周面にモールド結合（型成形による樹脂の固着および樹脂ボンド磁石とヨークとの磁気吸引力により）される。   The plurality of permanent magnets 23 are resin-bonded permanent magnets that are connected in series and integrated, and are polarized to the N pole and the S pole on the outer peripheral side and the inner peripheral side, and the polarity of the polarized poles is The poles adjacent to each other in the circumferential direction of the yoke 22A are mold-bonded to the inner peripheral surface of the yoke 22A so that the poles are different from the outer peripheral side and the inner peripheral side. Fixed and by a magnetic attractive force between the resin bonded magnet and the yoke).

前記永久磁石２３の射出成形にあたっては、図４で示すように、金型装置２７と、射出機２８とが用いられる。金型装置２７は、第１金型２９と、第１金型２９との間にヨーク２２Ａを挟持する第２金型３０と、前記ヨーク２２Ａの半径方向内方に配置されるようにして前記第１金型２９に装着されるリング状の着磁用磁石３１とを備え、第１金型２９、第２金型３０、前記ヨーク２２Ａおよび前記着磁用磁石３１の協働でキャビティ３２が形成される。   In the injection molding of the permanent magnet 23, as shown in FIG. 4, a mold device 27 and an injection machine 28 are used. The mold device 27 includes the first mold 29, the second mold 30 that sandwiches the yoke 22A between the first mold 29, and the radially inner side of the yoke 22A. A ring-shaped magnetizing magnet 31 mounted on the first mold 29, and the cavity 32 is formed by the cooperation of the first mold 29, the second mold 30, the yoke 22A and the magnetizing magnet 31. It is formed.

第２金型３０には、射出機２８の先端のノズル２８ａに接続されるスプルー３３と、前記キャビティ３２に通じる複数のゲート３４と、それらのゲート３４および前記スプルー３３間を結ぶランナー３５が形成される。コーティングされる樹脂で磁粉が覆われて成る粉末状の材料３６は、加熱溶融されて前記射出機２８から射出されるものであり、射出機２８の前記ノズル２８ａから前記スプルー３３、前記ランナー３５および前記ゲート３４を経て前記キャビティ３２に注入される。加熱溶融された前記材料３６は前記キャビティ３２での成形と同時に前記着磁用磁石３１によって着磁され、リング状に一体となった樹脂ボンド永久磁石である永久磁石２３が前記ヨーク２２Ａの内周面にモールド結合される。   In the second mold 30, a sprue 33 connected to the nozzle 28 a at the tip of the injection machine 28, a plurality of gates 34 communicating with the cavity 32, and a runner 35 connecting the gates 34 and the sprue 33 are formed. Is done. A powder material 36 in which magnetic powder is covered with a resin to be coated is heated and melted and injected from the injection machine 28. The sprue 33, the runner 35 and the nozzles 28a of the injection machine 28 are used. It is injected into the cavity 32 through the gate 34. The material 36 heated and melted is magnetized by the magnetizing magnet 31 simultaneously with the molding in the cavity 32, and the permanent magnet 23, which is a resin-bonded permanent magnet integrated in a ring shape, is formed on the inner periphery of the yoke 22A. Mold bonded to the surface.

このようにして内周面に永久磁石２３がモールド結合されたヨーク２２Ａは、前記ハブ２０に一体に連なった前記円筒部２１に圧入されることで、該円筒部２１の内周面に固着される。   The yoke 22A, in which the permanent magnet 23 is molded and bonded to the inner peripheral surface in this way, is fixed to the inner peripheral surface of the cylindrical portion 21 by being press-fitted into the cylindrical portion 21 integrally connected to the hub 20. The

次にこの第１の実施の形態の作用について説明すると、クランクシャフト１４に連結されるハブ２０と、該ハブ２０に一端部が連なる円筒部２１とが非磁性材料である樹脂で一体に形成され、前記円筒部２１の内周面にヨーク２２Ａが固着されるので、ハブ２０の中心軸線と、円筒部２１の内周面の中心軸線とを合致させることが容易となり、ヨーク２２Ａの芯出しを容易とすることができる。さらに前記ハブ２０における前記支持筒部２０ａが有するテーパ状の取付け孔２４に、ハブ２０の中心軸線を基準として追加の切削加工を施すことによってヨーク２２Ａの芯出しの精度をより一層高めることができる。しかもヨーク２２Ａの肉厚を薄くすることができ、ハブ２０および円筒部２１が樹脂から成ることと相俟ってロータ１３の軽量化を図ることができる。   Next, the operation of the first embodiment will be described. A hub 20 connected to the crankshaft 14 and a cylindrical portion 21 having one end connected to the hub 20 are integrally formed of a resin which is a nonmagnetic material. Since the yoke 22A is fixed to the inner peripheral surface of the cylindrical portion 21, it becomes easy to match the central axis of the hub 20 with the central axis of the inner peripheral surface of the cylindrical portion 21, and the yoke 22A is centered. Can be easy. Furthermore, the centering accuracy of the yoke 22A can be further improved by subjecting the taper-shaped mounting hole 24 of the support cylinder portion 20a of the hub 20 to additional cutting with reference to the central axis of the hub 20. . In addition, the thickness of the yoke 22A can be reduced, and the weight of the rotor 13 can be reduced due to the fact that the hub 20 and the cylindrical portion 21 are made of resin.

またヨーク２２Ａの内周面に固着される永久磁石２３が、射出成形で前記ヨーク２２Ａの内周面にモールド結合される樹脂ボンド永久磁石であるので、従来のフェライト磁石に比べて同じ起磁力を得るための体積が少なくてすみ、より軽量化を図るとともに永久磁石２３の組付けを容易とすることができる。   Further, since the permanent magnet 23 fixed to the inner peripheral surface of the yoke 22A is a resin-bonded permanent magnet molded and bonded to the inner peripheral surface of the yoke 22A by injection molding, it has the same magnetomotive force as compared with the conventional ferrite magnet. It is possible to reduce the volume to be obtained, and it is possible to reduce the weight and facilitate the assembly of the permanent magnet 23.

上述の第１の実施の形態では、円筒部２１に固着される前のヨーク２２Ａの内周面に射出成形される樹脂ボンド永久磁石をモールド結合するようにしたが、ハブ２０と一体の円筒部２１に圧入されたヨーク２２Ａの内周面に射出成形される樹脂ボンド永久磁石をモールド結合することも可能である。これにより、ハブ２０の中心軸線と、ヨーク２２Ａの内周面に射出成形される樹脂ボンド磁石の内周面の中心軸線とを合致させることが容易となり、芯出しを容易とすることができる。   In the first embodiment described above, the resin-bonded permanent magnet formed by injection molding is molded on the inner peripheral surface of the yoke 22A before being fixed to the cylindrical portion 21, but the cylindrical portion integrated with the hub 20 is used. It is also possible to mold-bond a resin-bonded permanent magnet that is injection-molded to the inner peripheral surface of the yoke 22 </ b> A press-fitted into 21. Thereby, it becomes easy to match the center axis of the hub 20 with the center axis of the inner peripheral surface of the resin bonded magnet that is injection-molded on the inner peripheral surface of the yoke 22A, and centering can be facilitated.

また上述の第１の実施の形態では、ハブ２０および円筒部２１が樹脂で一体に形成されていたが、前記ハブ２０および前記円筒部２１が、軽合金たとえばアルミニウム、マグネシウムまたはチタンから成るようにしても同様の効果を奏することができる。   In the first embodiment described above, the hub 20 and the cylindrical portion 21 are integrally formed of resin. However, the hub 20 and the cylindrical portion 21 are made of a light alloy such as aluminum, magnesium, or titanium. However, the same effect can be achieved.

本発明の第２の実施の形態として、図５で示すように、磁性金属製の帯板３７が複数回もしくは１回だけ（この実施の形態では２回）巻回されて成るようにヨーク２２Ｂを構成してもよい。   As a second embodiment of the present invention, as shown in FIG. 5, the yoke 22B is formed by winding a magnetic metal strip 37 a plurality of times or only once (twice in this embodiment). May be configured.

本発明の第３の実施の形態として、図６で示すように、磁性金属製の帯板３８が螺旋状に巻回されて成るようにヨーク２２Ｃを構成してもよく、この場合、帯板３８が螺旋状に巻回されて長く延びる円筒部から図６（ｂ）の鎖線で示すように必要長さに切断することで、ヨーク２２Ｃが形成されるようにすればよい。   As a third embodiment of the present invention, as shown in FIG. 6, the yoke 22C may be configured such that a belt plate 38 made of magnetic metal is spirally wound. The yoke 22C may be formed by cutting the cylinder 38 into a necessary length as shown by a chain line in FIG.

また本発明の第４の実施の形態として、図７で示すように、磁性金属から成るとともに横断面形状を矩形とした線材３９が螺旋状に巻回されて成るようにヨーク２２Ｄを構成してもよく、この場合、線材３９が螺旋状に巻回されて長く延びる円筒部から図７（ｂ）の鎖線で示すように必要長さに切断することで、ヨーク２２Ｄが形成されればよい。   Further, as a fourth embodiment of the present invention, as shown in FIG. 7, the yoke 22D is configured such that a wire rod 39 made of a magnetic metal and having a rectangular cross section is spirally wound. In this case, the yoke 22D may be formed by cutting the wire 39 into a required length as shown by a chain line in FIG.

さらに本発明の第５の実施の形態として、図８で示すように、磁性金属から成るとともに横断面形状を円形とした線材４０が螺旋状に巻回されて成るようにヨーク２２Ｅを構成してもよく、この場合、線材４０が螺旋状に巻回されて長く延びる円筒部から図８（ｂ）の鎖線で示すように必要長さに切断することで、ヨーク２２Ｅが形成されればよい。しかも前記ヨーク２２Ｅは前記円筒部２１内にねじ込むことで該円筒部２１の内周面に固着されるが、そのねじ込みにあたって前記円筒部２１の内周面に予め雌ねじが形成されていてもよく、そうすればその雌ねじの精度を高めることでヨーク２２Ｅの中心軸線をハブ２０の中心軸線に精度よく合致させることができる。また前記ヨーク２２Ｅの前記円筒部２１へのねじ込み方向は前記ハブ２０および前記円筒部２１の回転方向すなわち前記クランクシャフト１４の回転方向と反対方向とすることが望ましく、そうすれば前記クランクシャフト１４の回転に応じて前記ヨーク２２Ｅが前記円筒部２１によりねじ込まれる効果が得られ、前記ヨーク２２Ｅが前記円筒部２１の内周面により確実に固着される。   Further, as a fifth embodiment of the present invention, as shown in FIG. 8, the yoke 22E is configured such that a wire 40 made of a magnetic metal and having a circular cross-sectional shape is spirally wound. In this case, the yoke 22E may be formed by cutting the wire 40 into a necessary length as shown by a chain line in FIG. Moreover, the yoke 22E is fixed to the inner peripheral surface of the cylindrical portion 21 by being screwed into the cylindrical portion 21, but a female screw may be formed in advance on the inner peripheral surface of the cylindrical portion 21 for the screwing. Then, the center axis of the yoke 22E can be matched with the center axis of the hub 20 with high accuracy by increasing the accuracy of the female screw. In addition, the screwing direction of the yoke 22E into the cylindrical portion 21 is preferably set in the direction opposite to the rotation direction of the hub 20 and the cylindrical portion 21, that is, the direction of rotation of the crankshaft 14. The yoke 22E is screwed by the cylindrical portion 21 according to the rotation, and the yoke 22E is securely fixed to the inner peripheral surface of the cylindrical portion 21.

以上、本発明の実施の形態について説明したが、本発明は上記実施の形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。たとえば複数の永久磁石が、フェライト、希土類またはボンド磁石によって構成されてＮ極、Ｓ極の磁極を持つ複数の単体磁石で構成され、それらの単体磁石が、ヨークの内周面に、その周方向で隣接する単体磁石同士の極性が内周側および外周側で異なるように配置されてもよい。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible. For example, a plurality of permanent magnets are composed of a plurality of single magnets that are composed of ferrite, rare earth, or bonded magnets and have N-pole and S-pole magnetic poles, and these single-piece magnets are arranged on the inner peripheral surface of the yoke in the circumferential direction. The adjacent single magnets may be arranged so that the polarities of the adjacent single magnets are different on the inner peripheral side and the outer peripheral side.

１２・・・ステータ
１３・・・ロータ
１４・・・駆動軸であるクランクシャフト
２０・・・ハブ
２１・・・円筒部
２２Ａ，２２Ｂ，２２Ｃ，２２Ｄ，２２Ｅ・・・ヨーク
２３・・・永久磁石
３７，３８・・・帯板
３９，４０・・・線材 DESCRIPTION OF SYMBOLS 12 ... Stator 13 ... Rotor 14 ... Crankshaft 20 which is a drive shaft ... Hub 21 ... Cylindrical part 22A, 22B, 22C, 22D, 22E ... Yoke 23 ... Permanent magnet 37, 38 ... strips 39, 40 ... wire rods

Claims (8)

固定のステータ（１２）と、該ステータ（１２）を同軸に囲繞して円筒状に形成されるとともに駆動軸（１４）に連結される磁性材料製のヨーク（２２Ａ，２２Ｂ，２２Ｃ，２２Ｄ，２２Ｅ）の内周面に複数の永久磁石（２３）が設けられるロータ（１３）とを備えるアウターロータ型多極発電機において、前記駆動軸（１４）に連結されるハブ（２０）と、該ハブ（２０）に一端部が連なる円筒部（２１）とが非磁性材料で一体に形成され、前記円筒部（２１）の内周面に前記ヨーク（２２Ａ〜２２Ｅ）が固着されることを特徴とするアウターロータ型多極発電機におけるロータ構造。   A fixed stator (12), and a yoke (22A, 22B, 22C, 22D, 22E) made of a magnetic material that is coaxially surrounded by the stator (12) and is connected to the drive shaft (14). ) Having a rotor (13) provided with a plurality of permanent magnets (23) on the inner peripheral surface thereof, a hub (20) connected to the drive shaft (14), and the hub A cylindrical part (21) having one end connected to (20) is integrally formed of a nonmagnetic material, and the yoke (22A to 22E) is fixed to an inner peripheral surface of the cylindrical part (21). The rotor structure in the outer rotor type multipolar generator. 前記ハブ（２０）および前記円筒部（２１）が、樹脂から成ることを特徴とする請求項１に記載のアウターロータ型多極発電機におけるロータ構造。   The rotor structure in the outer rotor type multipolar generator according to claim 1, wherein the hub (20) and the cylindrical portion (21) are made of resin. 前記ハブ（２０）および前記円筒部（２１）が、軽金属から成ることを特徴とする請求項１に記載のアウターロータ型多極発電機におけるロータ構造。   The rotor structure in the outer rotor type multipolar generator according to claim 1, wherein the hub (20) and the cylindrical portion (21) are made of light metal. 前記ヨーク（２２Ａ）が、鉄管から成ることを特徴とする請求項１に記載のアウターロータ型発電機におけるロータ構造。   The rotor structure in an outer rotor type generator according to claim 1, wherein said yoke (22A) consists of an iron pipe. 前記ヨーク（２２Ｂ）は、磁性金属製の帯板（３７）が複数回もしくは１回だけ巻回されて成ることを特徴とする請求項１に記載のアウターロータ型多極発電機におけるロータ構造。   The rotor structure in an outer rotor type multipolar generator according to claim 1, wherein the yoke (22B) is formed by winding a magnetic metal strip (37) a plurality of times or only once. 前記ヨーク（２２Ｃ）は、磁性金属製の帯板（３８）が螺旋状に巻回されて成ることを特徴とする請求項１に記載のアウターロータ型多極発電機におけるロータ構造。   The rotor structure in an outer rotor type multipolar generator according to claim 1, wherein the yoke (22C) is formed by winding a magnetic metal strip (38) in a spiral shape. 前記ヨーク（２２Ｄ，２２Ｅ）は、磁性金属製の線材（３９，４０）が螺旋状に巻回されて成ることを特徴とする請求項１に記載のアウターロータ型多極発電機におけるロータ構造。   The rotor structure in the outer rotor type multipolar generator according to claim 1, wherein the yoke (22D, 22E) is formed by winding a magnetic metal wire (39, 40) in a spiral shape. 前記永久磁石（２３）が、射出成形で前記ヨーク（２２Ａ〜２２Ｅ）の内周面にモールド結合される樹脂ボンド永久磁石であることを特徴とする請求項１〜７のいずれか１項に記載のアウターロータ型多極発電機におけるロータ構造。   The permanent magnet (23) is a resin-bonded permanent magnet that is molded and bonded to the inner peripheral surface of the yoke (22A to 22E) by injection molding. The rotor structure in the outer rotor type multipolar generator.
JP2016083979A 2016-04-19 2016-04-19 Rotor structure in outer rotor type multipole generator Pending JP2017195690A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2016083979A JP2017195690A (en) 2016-04-19 2016-04-19 Rotor structure in outer rotor type multipole generator
PCT/JP2017/011430 WO2017183378A1 (en) 2016-04-19 2017-03-22 Rotor structure for outer-rotor type multi-pole generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016083979A JP2017195690A (en) 2016-04-19 2016-04-19 Rotor structure in outer rotor type multipole generator

Publications (1)

Publication Number Publication Date
JP2017195690A true JP2017195690A (en) 2017-10-26

Family

ID=60115801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016083979A Pending JP2017195690A (en) 2016-04-19 2016-04-19 Rotor structure in outer rotor type multipole generator

Country Status (2)

Country Link
JP (1) JP2017195690A (en)
WO (1) WO2017183378A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020189442A1 (en) * 2019-03-19 2020-09-24 株式会社デンソー Rotary electric machine and method for manufacturing rotor
WO2021029309A1 (en) * 2019-08-09 2021-02-18 ミネベアミツミ株式会社 Rotating device
DE102022210700A1 (en) 2022-10-11 2024-04-11 Robert Bosch Gesellschaft mit beschränkter Haftung Electronically commutated electric motor of external rotor design and method for its manufacture
US12003139B2 (en) 2019-02-25 2024-06-04 Denso Corporation Rotating electric machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7263737B2 (en) * 2018-10-30 2023-04-25 株式会社デンソー Rotating electric machine
JP6993602B1 (en) 2020-09-25 2022-01-13 ダイキン工業株式会社 Motors, blowers, and air conditioners

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005287107A (en) * 2004-03-26 2005-10-13 Aisin Seiki Co Ltd Rotor of rotary electric machine
DE102004025226A1 (en) * 2004-05-22 2005-12-22 Minebea Co., Ltd. Spindle motor in hard-disk drive, has hollow cylindrical yoke having ring-shaped multiple layers formed by laminating soft magnetism materials such as silicon steel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12003139B2 (en) 2019-02-25 2024-06-04 Denso Corporation Rotating electric machine
WO2020189442A1 (en) * 2019-03-19 2020-09-24 株式会社デンソー Rotary electric machine and method for manufacturing rotor
JP2020156189A (en) * 2019-03-19 2020-09-24 株式会社デンソー Rotary electric machine and manufacturing method of rotor
CN113661634A (en) * 2019-03-19 2021-11-16 株式会社电装 Rotating electric machine and method for manufacturing rotor
JP7326792B2 (en) 2019-03-19 2023-08-16 株式会社デンソー Rotating electric machine and rotor manufacturing method
WO2021029309A1 (en) * 2019-08-09 2021-02-18 ミネベアミツミ株式会社 Rotating device
JP2021029083A (en) * 2019-08-09 2021-02-25 ミネベアミツミ株式会社 Rotary apparatus
JP7379011B2 (en) 2019-08-09 2023-11-14 ミネベアミツミ株式会社 rotating equipment
DE102022210700A1 (en) 2022-10-11 2024-04-11 Robert Bosch Gesellschaft mit beschränkter Haftung Electronically commutated electric motor of external rotor design and method for its manufacture

Also Published As

Publication number Publication date
WO2017183378A1 (en) 2017-10-26

Similar Documents

Publication Publication Date Title
WO2017183378A1 (en) Rotor structure for outer-rotor type multi-pole generator
CN103580326B (en) Rotor and motor
US10848037B2 (en) Permanent magnet rotor, method for the production thereof using a magnetizing fixture
JP2007074776A (en) Rotating electric machine
US20130069469A1 (en) Rotor of motor, method of producing the rotor, inner rotor-type brushless motor and method of producing the motor
CN107534378B (en) Slotless brushless DC motor/actuator
JP2005304292A (en) Process for manufacturing rotor unit for motor, rotor unit for motor, and motor
JP5501660B2 (en) Electric motor and its rotor
EP1739811A1 (en) Anisotropic bond magnet for four-magnetic-pole motor, motor using the same, device for orientation processing of anisotropic bond magnet for four-magnetic-pole motor
US9490669B2 (en) Rotor and motor
JP2014155415A (en) Embedded magnet rotor and method of manufacturing embedded magnet rotor
JP2007214393A (en) Annular polar anisotropic plastic magnet and rotor used for motor
JP2001157393A (en) Rotor structure for inner rotor-type motor
MY136315A (en) Motor
JP6692870B2 (en) Outer rotor type rotor for electric motor
CN106253518A (en) The manufacture method of rotor, motor and rotor
US10418870B2 (en) Synchronous reluctance motor with magnetic leakage path saturated by permanent magnets
JP2012010571A (en) Magnet rotor for rotary electric machine, manufacturing method of the same, and inner rotor type motor
JPH11243654A (en) Dynamoelectric machine magnet rotor
KR20170062889A (en) Surface permanent magnet synchronous motor
JP2005057955A (en) Motor and process for manufacturing its rotor
JP2008099445A (en) Inner rotor of rotary electric machine
JP2013188036A (en) Rotor for electric motor, electric motor, and washing machine
JP2018023218A (en) Rotor structure in outer rotor type multi-polar generator
JP6413601B2 (en) motor