JP2011109786A - Electric motor rotor - Google Patents

Electric motor rotor Download PDF

Info

Publication number
JP2011109786A
JP2011109786A JP2009261436A JP2009261436A JP2011109786A JP 2011109786 A JP2011109786 A JP 2011109786A JP 2009261436 A JP2009261436 A JP 2009261436A JP 2009261436 A JP2009261436 A JP 2009261436A JP 2011109786 A JP2011109786 A JP 2011109786A
Authority
JP
Japan
Prior art keywords
magnet
rotor core
rotor
fixing member
electric motor
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
JP2009261436A
Other languages
Japanese (ja)
Inventor
Katsunari Matsumoto
克成 松本
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2009261436A priority Critical patent/JP2011109786A/en
Publication of JP2011109786A publication Critical patent/JP2011109786A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric motor rotor capable of ensuring high strength and favorably suppressing flux leakage from a magnet. <P>SOLUTION: A rotor 30 has multiple permanent magnets 50 and forms the electric motor together with a stator. The rotor includes a rotor core 31 having multiple magnet supporting recesses 32 each so formed as to support a pair of permanent magnets 50, and multiple magnet fixing members 40 including magnet holders 41 placed in the magnet supporting recesses 32 so that each of them is abutted against a pair of permanent magnets 50 supported by the magnet supporting recesses 32 without contact with the rotor core 31, supporting column portions 42 extended from the magnet holders 41, and mounts 45 provided at the end of the corresponding supporting column portion 42 on the opposite side to the magnet holder 41 and fixed on the rotor core 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、電動機ロータに関し、特に、複数の磁石を有し、ステータと共に電動機を構成する電動機ロータに関する。   The present invention relates to an electric motor rotor, and more particularly to an electric motor rotor having a plurality of magnets and constituting an electric motor together with a stator.

従来、この種のロータとして、回転子鉄心と、この回転子鉄心の外周部に周方向に一定の間隔を存して設けられた複数の磁石挿入孔部と、これらの磁石挿入孔部にそれぞれ挿入固定された磁極形成用の永久磁石と、磁石挿入孔部の端部に回転子鉄心の外周との間にチップ部を形成するように設けられると共に永久磁石の端部の磁束漏洩を制限する逃げ孔部と、回転子鉄心の外周部に設けられて磁極の中心に対して所定の角度を存する位置からチップ部近傍の位置までの所定の範囲を有する外周溝部と、回転子鉄心の外周部に外周溝部に連なるように設けられてチップ部の外周をなすチップ溝部とを備えるものが知られている（例えば、特許文献１参照）。このロータでは、外周溝部に連なると共にチップ部の外周をなすチップ溝部が回転子鉄心の外周部に設けられていることから、外周溝部でトルクリプル、鉄損および高調波を低減可能となる。また、外周溝部の底部からチップ部の外周までにかけての連なり部分の段差が小さくなるので、回転子の回転によって永久磁石による遠心力を受けても当該連なり部分での応力の集中を生じ難くすることができる。   Conventionally, as this type of rotor, a rotor core, a plurality of magnet insertion holes provided at a constant interval in the circumferential direction on the outer periphery of the rotor core, and the magnet insertion holes respectively Provided to form a tip portion between the inserted and fixed magnetic pole forming permanent magnet and the outer periphery of the rotor core at the end of the magnet insertion hole, and restricts magnetic flux leakage at the end of the permanent magnet An escape hole, an outer peripheral groove provided on the outer peripheral portion of the rotor core and having a predetermined range from a position having a predetermined angle with respect to the center of the magnetic pole to a position near the tip portion, and an outer peripheral portion of the rotor core And a chip groove part which is provided so as to be continuous with the outer peripheral groove part and forms the outer periphery of the chip part is known (for example, see Patent Document 1). In this rotor, since the tip groove portion that is continuous with the outer peripheral groove portion and forms the outer periphery of the tip portion is provided in the outer peripheral portion of the rotor core, torque ripple, iron loss, and harmonics can be reduced at the outer peripheral groove portion. In addition, since the level difference of the continuous portion from the bottom of the outer peripheral groove portion to the outer periphery of the tip portion is reduced, it is difficult to cause stress concentration in the continuous portion even if the rotor is subjected to centrifugal force due to the rotation of the rotor. Can do.

特開２００８−２７８５５３号公報JP 2008-278553 A

しかしながら、上記従来のロータにおいて、回転子の回転によって永久磁石による遠心力を受けても破損しない強度を確保しつつ永久磁石の端部の磁束漏洩が大きくならないようにチップ部の厚さ寸法を設定することは極めて困難である。すなわち、強度を優先してチップ部の厚さ寸法を大きくすれば永久磁石の端部における磁束漏洩が大きくなってしまい、当該磁束漏洩の低減を優先すればチップ部の強度を確保することが困難となってしまう。   However, in the above conventional rotor, the thickness of the tip portion is set so that the magnetic flux leakage at the end of the permanent magnet does not increase while ensuring the strength not to be damaged even if the rotor is subjected to centrifugal force due to the rotation of the rotor. It is extremely difficult to do. That is, if the thickness dimension of the tip portion is increased with priority given to strength, the magnetic flux leakage at the end of the permanent magnet will increase, and if priority is given to the reduction of the magnetic flux leakage, it is difficult to ensure the strength of the tip portion. End up.

そこで、本発明は、高い強度を有すると共に磁石からの磁束漏洩を良好に抑制可能な電動機ロータの提供を主目的とする。   SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an electric motor rotor having high strength and capable of satisfactorily suppressing magnetic flux leakage from a magnet.

本発明による電動機ロータは、上記主目的を達成するために以下の手段を採っている。   The motor rotor according to the present invention employs the following means in order to achieve the main object.

本発明による電動機ロータは、
複数の磁石を有し、ステータと共に電動機を構成する電動機ロータであって、
それぞれ一対の前記磁石を支持するように形成された複数の磁石支持凹部を有するロータコアと、
前記ロータコアと接触することなく前記磁石支持凹部により支持された前記一対の磁石と当接するように該磁石支持凹部に配置される磁石押さえ部と、該磁石押さえ部から延出された支柱部と、前記支柱部の前記磁石押さえ部とは反対側の端部に設けられて前記ロータコアに対して固定される取付部とを含む複数の磁石固定部材と、
を備えるものである。 The motor rotor according to the present invention is:
An electric motor rotor having a plurality of magnets and constituting an electric motor together with a stator,
A rotor core having a plurality of magnet support recesses each formed to support a pair of the magnets;
A magnet pressing portion disposed in the magnet support recess so as to contact the pair of magnets supported by the magnet support recess without contacting the rotor core, and a column portion extending from the magnet pressing portion; A plurality of magnet fixing members including an attachment portion that is provided at an end of the column portion opposite to the magnet pressing portion and is fixed to the rotor core;
Is provided.

この電動機ロータの組立に際しては、ロータコアに形成された複数の磁石支持凹部のそれぞれに一対の磁石を配置すると共に、磁石固定部材の磁石押さえ部をロータコアと接触することなく磁石支持凹部により支持された一対の磁石と当接するように当該磁石支持凹部に配置し、磁石固定部材の取付部をロータコアに対して固定する。こうして磁石固定部材をロータコアに固定すれば、磁石押さえ部と磁石支持凹部とにより一対の磁石が保持されてロータコアに対して固定されることになる。そして、磁石固定部材と磁石支持凹部とにより一対の磁石が保持された状態では、磁石押さえ部はロータコアと接触せず、各磁石の端部付近において、磁石押さえ部とロータコアとの間に間隙が形成されることになる。これにより、この電動機ロータでは、ロータコアに対して磁石の端部周辺に孔部を形成するための細幅の部位（チップ部等）を形成する必要がなくなり、ロータコアの強度を良好に確保しつつ磁石の端部付近における磁束漏洩を抑制することが可能となる。また、支柱部や取付部を含む磁石固定部材自体の強度も容易に確保することができる。従って、この電動機ロータは、高い強度を有すると共に磁石からの磁束漏洩を良好に抑制可能に構成される。   In assembling the electric motor rotor, a pair of magnets are disposed in each of the plurality of magnet support recesses formed in the rotor core, and the magnet pressing portion of the magnet fixing member is supported by the magnet support recess without contacting the rotor core. It arrange | positions in the said magnet support recessed part so that it may contact | abut with a pair of magnet, and the attaching part of a magnet fixing member is fixed with respect to a rotor core. When the magnet fixing member is fixed to the rotor core in this way, the pair of magnets are held by the magnet pressing portion and the magnet support concave portion and fixed to the rotor core. In a state where the pair of magnets are held by the magnet fixing member and the magnet support recess, the magnet pressing portion does not contact the rotor core, and there is a gap between the magnet pressing portion and the rotor core in the vicinity of the end of each magnet. Will be formed. Thereby, in this electric motor rotor, it is not necessary to form a narrow part (chip part or the like) for forming a hole around the end of the magnet with respect to the rotor core, while ensuring the strength of the rotor core satisfactorily. Magnetic flux leakage near the end of the magnet can be suppressed. Further, the strength of the magnet fixing member itself including the support column and the mounting portion can be easily ensured. Therefore, this electric motor rotor has a high strength and is configured to be able to satisfactorily suppress magnetic flux leakage from the magnet.

また、前記ロータコアの前記磁石支持凹部は、該ロータコアの中心軸側から外周側に向かうほど互いに離間するように形成された一対の磁石支持面を有してもよく、前記磁石固定部材の前記磁石押さえ部は、外周側から前記支柱部に向かうほど互いに近接するように形成された一対の磁石当接面を有してもよい。これにより、磁石固定部材を用いることにより１つの磁石支持凹部に対して一対の磁石を容易かつ強固にＶ字状に配置することが可能となる。   Further, the magnet support recess of the rotor core may have a pair of magnet support surfaces formed so as to be separated from each other toward the outer peripheral side from the central axis side of the rotor core, and the magnet of the magnet fixing member The pressing portion may have a pair of magnet contact surfaces formed so as to be closer to each other as it goes from the outer peripheral side toward the support column. Thereby, a pair of magnets can be easily and firmly arranged in a V shape with respect to one magnet support recess by using the magnet fixing member.

更に、前記ロータコアは、前記磁石支持凹部の中心軸側に前記磁石固定部材の前記取付部が挿入される孔部を有してもよく、該孔部と前記磁石固定部材の前記取付部との間隙には、非磁性体が充填されてもよい。これにより、取付部をロータコアに対して強固に固定することで磁石固定部材ひいては磁石をロータコアに対して強固に固定することができる。また、孔部と取付部との間隙に非磁性体を充填することにより、当該非磁性体により取付部や支柱部すなわち磁石固定部材がロータコアから磁気的に絶縁されるので、磁石からの磁束漏洩をより良好に抑制することが可能となる。   Furthermore, the rotor core may have a hole portion into which the mounting portion of the magnet fixing member is inserted on the central axis side of the magnet support recess, and the hole portion and the mounting portion of the magnet fixing member The gap may be filled with a nonmagnetic material. Thereby, the magnet fixing member and thus the magnet can be firmly fixed to the rotor core by firmly fixing the attachment portion to the rotor core. In addition, by filling the gap between the hole and the mounting portion with a non-magnetic material, the mounting portion and the support column, that is, the magnet fixing member, are magnetically insulated from the rotor core by the non-magnetic material. Can be suppressed more satisfactorily.

そして、前記ロータコアの前記磁石支持凹部は、前記磁石固定部材の前記支柱部の両側に空間を画成するように形成されてもよい。これにより、磁石固定部材の取付部や支柱部を介して磁束漏洩をより一層良好に抑制することが可能となる。   The magnet support recess of the rotor core may be formed so as to define a space on both sides of the support column of the magnet fixing member. Thereby, it becomes possible to suppress magnetic flux leakage still more satisfactorily through the attachment part and support | pillar part of a magnet fixing member.

本発明の実施例に係るモータ１０の概略構成図である。1 is a schematic configuration diagram of a motor 10 according to an embodiment of the present invention. モータ１０のロータ３０を構成するロータコア３１を示す断面図である。2 is a cross-sectional view showing a rotor core 31 that constitutes a rotor 30 of the motor 10. FIG. 磁石固定部材４０を示す断面図である。3 is a cross-sectional view showing a magnet fixing member 40. FIG. ロータ３０の要部を示す拡大断面図である。3 is an enlarged cross-sectional view showing a main part of a rotor 30. FIG.

次に、本発明を実施するための形態を実施例を用いて説明する。   Next, the form for implementing this invention is demonstrated using an Example.

図１は、本発明の実施例に係るモータ１０の概略構成図である。同図に示すモータ１０は、電動機として作動すると共に発電機としても作動することができる同期発電電動機として構成されており、例えばハイブリッド自動車や電気自動車等に搭載される。実施例のモータ１０は、磁束を発生させるステータ２０と、磁極を構成する永久磁石５０を複数有すると共に回転シャフト１５に固定されるロータ３０とを備える。ステータ２０は、電磁鋼板等の磁性体からなる環状のステータコア２１と、例えば分布巻によりステータコア２１に装着されたＵ相コイル２２Ｕ、Ｖ相コイル２２ＶおよびＷ相コイル２２Ｗとを含む。また、ステータ２０と共にモータ１０を構成するロータ３０は、実施例ではそれぞれ断面矩形状を有する複数（実施例では１６個）の永久磁石５０に加えて、ロータコア３１と、複数の永久磁石５０をロータコア３１に対して固定するための複数の磁石固定部材４０とを含む。   FIG. 1 is a schematic configuration diagram of a motor 10 according to an embodiment of the present invention. The motor 10 shown in the figure is configured as a synchronous generator motor that can operate as an electric motor as well as a generator, and is mounted on, for example, a hybrid vehicle or an electric vehicle. The motor 10 according to the embodiment includes a stator 20 that generates magnetic flux, and a rotor 30 that has a plurality of permanent magnets 50 that constitute magnetic poles and is fixed to the rotary shaft 15. The stator 20 includes an annular stator core 21 made of a magnetic material such as an electromagnetic steel plate, and a U-phase coil 22U, a V-phase coil 22V, and a W-phase coil 22W that are mounted on the stator core 21 by distributed winding, for example. The rotor 30 that constitutes the motor 10 together with the stator 20 includes a rotor core 31 and a plurality of permanent magnets 50 in addition to a plurality of (16 in the embodiment) permanent magnets 50 each having a rectangular cross section in the embodiment. And a plurality of magnet fixing members 40 for fixing to 31.

図２は、ロータ３０を構成するロータコア３１を示す断面図である。実施例のロータコア３１は、図示するような断面形状を有する電磁鋼板等からなる板体を多数積層することにより構成され、その中心に回転シャフト１５が挿入・固定される中心孔３１ａを有する。また、ロータコア３１の外周部には、軸方向に延びる複数（実施例では、４５°間隔で合計８個）の磁石支持凹部３２が形成されている。各磁石支持凹部３２は、断面略逆三角形状の空間として構成されており、ロータコア３１の中心孔３１ａ（中心軸側）から外周側に向かうほど互いに離間するように形成された一対の磁石支持面３２ａをそれぞれ有する。また、磁石支持凹部３２の底部３２ｂは、図２に示すように拡幅されて断面略矩形状を有する。そして、各磁石支持凹部３２（底部３２ｂ）の中心孔３１ａ（中心軸）側には、放射状に延びる空間部と当該空間部と概ね直交する方向に延びる空間部とからなり断面略Ｔ字形状を有する挿入孔部３３が形成されている。   FIG. 2 is a cross-sectional view showing the rotor core 31 that constitutes the rotor 30. The rotor core 31 of the embodiment is configured by laminating a large number of plate bodies made of electromagnetic steel plates or the like having a cross-sectional shape as shown in the figure, and has a center hole 31a into which the rotary shaft 15 is inserted and fixed. In addition, a plurality of magnet support recesses 32 (in the embodiment, a total of eight at 45 ° intervals) extending in the axial direction are formed on the outer peripheral portion of the rotor core 31. Each of the magnet support recesses 32 is configured as a space having a substantially inverted triangular cross section, and a pair of magnet support surfaces formed so as to be separated from each other toward the outer peripheral side from the center hole 31a (center axis side) of the rotor core 31. 32a. The bottom 32b of the magnet support recess 32 is widened and has a substantially rectangular cross section as shown in FIG. Each magnet support recess 32 (bottom 32b) has a substantially T-shaped cross section on the side of the center hole 31a (center axis) that includes a radially extending space portion and a space portion extending in a direction substantially orthogonal to the space portion. An insertion hole 33 is formed.

また、磁石固定部材４０は、図３に示すような断面形状を有する電磁鋼板等からなる板体を多数積層することにより構成される。すなわち、実施例の磁石固定部材４０は、断面略扇形状を有する磁石押さえ部４１と、磁石押さえ部４１から延出された支柱部４２と、支柱部４２の磁石押さえ部４１とは反対側の端部から外方かつ両側に延出された張り出し部４４とを含む。磁石押さえ部４１の外周面は、ロータコア３１の半径ｄと同一の曲率半径を有する円周面とされている（図２参照）。そして、磁石押さえ部４１の２つの側面は、外周側から支柱部４２に向かうほど互いに近接するように形成されており、これら２つの側面は、上述のロータコア３１に形成された磁石支持凹部３２の一対の磁石支持面３２ａと共に一つの磁極を構成する一対（２つ）の永久磁石５０を挟持する一対の磁石当接面４１ａとして機能する。実施例において、磁石押さえ部４１の各磁石当接面４１ａは、磁石支持凹部３２の磁石支持面３２ａの対応する一方と平行になるように形成されている。また、支柱部４２は、磁石押さえ部４１の内周側の幅方向における中心部から延出され、張り出し部４４は、支柱部４２と直交するように当該支柱部４２の先端部分から延出される。実施例では、支柱部４２の先端部分と張り出し部４４とにより構成される略Ｔ字状の部分が上述のロータコア３１の挿入孔部３３に挿入可能な寸法に形成されており、支柱部４２の先端部分と張り出し部４４とは、ロータコア３１に対して固定される取付部４５を構成する。そして、磁石押さえ部４１の幅や高さ、支柱部の高さといった磁石固定部材４０の寸法は、取付部４５をロータコア３１の挿入孔部３３に挿入・固定した際に、磁石押さえ部４１がロータコア３１と接触することがないように定められる。   Moreover, the magnet fixing member 40 is comprised by laminating | stacking many plate bodies which consist of an electromagnetic steel plate etc. which have a cross-sectional shape as shown in FIG. That is, the magnet fixing member 40 according to the embodiment includes a magnet pressing portion 41 having a substantially fan-shaped cross section, a column portion 42 extending from the magnet pressing portion 41, and the magnet pressing portion 41 on the side opposite to the magnet pressing portion 41. And an overhanging portion 44 extending outwardly and on both sides from the end portion. The outer circumferential surface of the magnet pressing portion 41 is a circumferential surface having the same radius of curvature as the radius d of the rotor core 31 (see FIG. 2). The two side surfaces of the magnet pressing portion 41 are formed so as to be closer to each other toward the support column 42 from the outer peripheral side, and these two side surfaces are the magnet support recesses 32 formed in the rotor core 31 described above. It functions as a pair of magnet contact surfaces 41a that sandwich a pair (two) of permanent magnets 50 that constitute one magnetic pole together with the pair of magnet support surfaces 32a. In the embodiment, each magnet contact surface 41 a of the magnet pressing portion 41 is formed to be parallel to a corresponding one of the magnet support surfaces 32 a of the magnet support recess 32. Further, the column portion 42 extends from the center portion in the width direction on the inner peripheral side of the magnet pressing portion 41, and the overhang portion 44 extends from the tip portion of the column portion 42 so as to be orthogonal to the column portion 42. . In the embodiment, a substantially T-shaped portion constituted by the tip portion of the support column 42 and the overhanging portion 44 is formed to have a size that can be inserted into the insertion hole 33 of the rotor core 31 described above. The tip portion and the overhanging portion 44 constitute an attachment portion 45 that is fixed to the rotor core 31. The dimensions of the magnet fixing member 40 such as the width and height of the magnet pressing portion 41 and the height of the support column are such that when the mounting portion 45 is inserted / fixed in the insertion hole 33 of the rotor core 31, It is determined not to contact the rotor core 31.

上述のロータコア３１や磁石固定部材４０を含むロータ３０の組立に際しては、ロータコア３１に形成された複数の磁石支持面３２ａのそれぞれに永久磁石５０を載置（仮止め）し、ロータコア３１の磁石支持凹部３２のそれぞれに一対（２つ）の永久磁石５０を配置する。次いで、各磁石当接面４１ａを対応する永久磁石５０と当接させると共に取付部４５をロータコア３１の挿入孔部３３に挿入し、ロータコア３１の各磁石支持凹部３２のそれぞれに対して磁石固定部材４０を配置する。そして、治具等を用いて各磁石固定部材４０をロータコア３１の中心軸に向けて押圧しながら、挿入孔部３３と磁石固定部材４０の取付部４５との間隙に樹脂等の非磁性体３６を充填する。これにより、各磁石固定部材４０がロータコア３１に対して強固に固定されると共に、各磁石固定部材４０の磁石押さえ部４１とそれに対応した磁石支持凹部３２とにより一対の永久磁石５０が保持されてロータコア３１に対して強固に固定されることになる。   When the rotor 30 including the rotor core 31 and the magnet fixing member 40 is assembled, the permanent magnet 50 is placed (temporarily fixed) on each of the plurality of magnet support surfaces 32a formed on the rotor core 31, and the magnet support of the rotor core 31 is performed. A pair (two) of permanent magnets 50 are disposed in each of the recesses 32. Next, each magnet contact surface 41 a is brought into contact with the corresponding permanent magnet 50 and the attachment portion 45 is inserted into the insertion hole 33 of the rotor core 31, and a magnet fixing member is inserted into each magnet support recess 32 of the rotor core 31. 40 is arranged. Then, while pressing each magnet fixing member 40 toward the central axis of the rotor core 31 using a jig or the like, a non-magnetic material 36 such as resin is inserted in the gap between the insertion hole 33 and the mounting portion 45 of the magnet fixing member 40. Fill. As a result, each magnet fixing member 40 is firmly fixed to the rotor core 31, and a pair of permanent magnets 50 are held by the magnet pressing portion 41 of each magnet fixing member 40 and the corresponding magnet support recess 32. The rotor core 31 is firmly fixed.

こうしてロータコア３１の組立が完了した段階では、各磁石固定部材４０の磁石押さえ部４１は、ロータコア３１と接触することなく磁石支持凹部３２により支持された一対の永久磁石５０と当接する。従って、磁石固定部材４０と磁石支持凹部３２とにより一対の永久磁石５０が保持された状態では、図４に示すように、各永久磁石５０の端部付近において磁石押さえ部４１とロータコア３１との間に間隙が形成されることになる。また、ロータコアの挿入孔部３３と磁石固定部材４０の取付部４５との間隙には、樹脂等の非磁性体３６が充填されることから、当該非磁性体３６により取付部４５や支柱部４２すなわち磁石固定部材４０がロータコアから磁気的に絶縁されることになる。更に、ロータコア３１の各磁石支持凹部３２の底部３２ｂが拡幅されていることから、各磁石固定部材４０の支柱部４２の両側には、図４に示すように空間が画成されることになる。   Thus, at the stage where the assembly of the rotor core 31 is completed, the magnet pressing portion 41 of each magnet fixing member 40 abuts with the pair of permanent magnets 50 supported by the magnet support recess 32 without contacting the rotor core 31. Therefore, in a state where the pair of permanent magnets 50 is held by the magnet fixing member 40 and the magnet support recess 32, the magnet pressing portion 41 and the rotor core 31 are located near the end of each permanent magnet 50 as shown in FIG. A gap will be formed between them. In addition, since the gap between the insertion hole 33 of the rotor core and the mounting portion 45 of the magnet fixing member 40 is filled with a nonmagnetic material 36 such as a resin, the mounting portion 45 and the column portion 42 are filled by the nonmagnetic material 36. That is, the magnet fixing member 40 is magnetically insulated from the rotor core. Further, since the bottom 32b of each magnet support recess 32 of the rotor core 31 is widened, a space is defined on both sides of the support post portion 42 of each magnet fixing member 40 as shown in FIG. .

以上説明したように、実施例のロータ３０の組立に際しては、ロータコア３１に形成された複数の磁石支持凹部３２のそれぞれに一対の永久磁石５０を配置すると共に、磁石固定部材４０の磁石押さえ部４１をロータコア３１と接触することなく磁石支持凹部３２により支持された一対の永久磁石５０と当接するように当該磁石支持凹部３２に配置し、磁石固定部材４０の取付部４５をロータコア３１に対して固定する。こうして磁石固定部材４０をロータコア３１に固定すれば、磁石押さえ部４１と磁石支持凹部３２とにより一対の永久磁石５０が保持されてロータコア３１に対して固定されることになる。そして、磁石固定部材４０と磁石支持凹部３２とにより一対の永久磁石５０が保持された状態では、磁石押さえ部４１はロータコア３１と接触せず、各永久磁石５０の端部付近において磁石押さえ部４１とロータコア３１との間に間隙が形成されることになる。これにより、実施例のロータ３０では、ロータコア３１に対して永久磁石５０の端部周辺に孔部を形成するための細幅のチップ部やブリッジ部（磁石固定部材４０の支柱部４２に対応した部位）を形成する必要がなくなり、ロータコア３１の強度を良好に確保しつつ永久磁石５０の端部付近における磁束漏洩を抑制することが可能となる。この結果、実施例のロータ３０では、永久磁石５０のサイズアップや数の増加を抑制して低コスト化を図ることができる。また、磁石固定部材４０の支柱部４２や張り出し部４４等に例えば３〜５ｍｍ程度の幅をもたせれば、これら支柱部４２や張り出し部４４の強度を充分に確保することができるので、これらの要素を含む磁石固定部材４０自体の強度も容易に確保することができる。従って、実施例のロータ３０は、高い強度を有すると共に永久磁石５０からの磁束漏洩を良好に抑制可能に構成される。   As described above, when assembling the rotor 30 of the embodiment, the pair of permanent magnets 50 is disposed in each of the plurality of magnet support recesses 32 formed in the rotor core 31 and the magnet pressing portion 41 of the magnet fixing member 40. Is disposed in the magnet support recess 32 so as to contact the pair of permanent magnets 50 supported by the magnet support recess 32 without contacting the rotor core 31, and the mounting portion 45 of the magnet fixing member 40 is fixed to the rotor core 31. To do. When the magnet fixing member 40 is fixed to the rotor core 31 in this way, the pair of permanent magnets 50 are held and fixed to the rotor core 31 by the magnet pressing portion 41 and the magnet support recess 32. In a state where the pair of permanent magnets 50 is held by the magnet fixing member 40 and the magnet support recess 32, the magnet pressing part 41 does not contact the rotor core 31, and the magnet pressing part 41 is near the end of each permanent magnet 50. A gap is formed between the rotor core 31 and the rotor core 31. As a result, in the rotor 30 of the embodiment, a narrow tip portion or a bridge portion (corresponding to the column portion 42 of the magnet fixing member 40) for forming a hole portion around the end portion of the permanent magnet 50 with respect to the rotor core 31. Therefore, it is possible to suppress magnetic flux leakage near the end of the permanent magnet 50 while ensuring the strength of the rotor core 31 satisfactorily. As a result, in the rotor 30 of the embodiment, it is possible to reduce the cost by suppressing the increase in the size and the number of the permanent magnets 50. Moreover, if the support | pillar part 42 of the magnet fixing member 40, the overhang | projection part 44, etc. have a width | variety of about 3-5 mm, since the intensity | strength of these support | pillar part 42 and the overhang | projection part 44 can fully be ensured, these The strength of the magnet fixing member 40 itself including the elements can be easily ensured. Therefore, the rotor 30 of the embodiment has a high strength and is configured to be able to satisfactorily suppress magnetic flux leakage from the permanent magnet 50.

また、実施例において、ロータコア３１の磁石支持凹部３２は、ロータコア３１の中心軸側から外周側に向かうほど互いに離間するように形成された一対の磁石支持面３２ａを有しており、磁石固定部材４０の磁石押さえ部４１は、外周側から支柱部４２に向かうほど互いに近接するように形成された一対の磁石当接面４１ａを有している。これにより、磁石固定部材４０を用いることにより、１つの磁石支持凹部３２に対して一対の永久磁石５０を容易かつ強固にＶ字状に配置することが可能となる。更に、ロータコア３１は、磁石支持凹部３２の中心軸側に磁石固定部材４０の取付部４５が挿入される挿入孔部３３を有しており、挿入孔部３３と磁石固定部材４０の取付部４５との間隙には、樹脂等の非磁性体３６が充填される。これにより、取付部４５をロータコア４１に対して強固に固定することで磁石固定部材４０ひいては永久磁石５０をロータコア３１に対して強固に固定することができる。また、挿入孔部３３と取付部４５との間隙に非磁性体３６を充填することにより、当該非磁性体３６により取付部４５や支柱部４２すなわち磁石固定部材４０がロータコア３１から磁気的に絶縁されるので、永久磁石５０からの磁束漏洩をより良好に抑制することが可能となる。そして、実施例では、磁石支持凹部３２の底部３２ｂが支柱部４２の両側に空間を画成するように拡幅されている。これにより、磁石固定部材４０の取付部４５や支柱部４２を介した磁束の回り込み、すなわち磁束漏洩をより一層良好に抑制することが可能となる。支柱部４２付近の空間を拡大するために、図４に示すように、磁石固定部材４０の磁石押さえ部４１の内周側、すなわち支柱部４２の基端付近に凹部４１ｂを形成してもよい。また、実施例のロータ３０は、ロータコア３１の外周に別体の複数の磁石固定部材４０を装着することにより構成されるものであり、磁石固定部材４０が高い磁気性能を有していれば、ロータコア３１自体にはさほど高い磁気性能が要求されなくなる。従って、実施例のロータ３０では、ロータコア３１を比較的低い磁気性能を有する金属や非磁性体等により形成し、それにより低コスト化や静音性といったモータ性能の向上を図ることも可能となる。   In the embodiment, the magnet support recess 32 of the rotor core 31 has a pair of magnet support surfaces 32 a formed so as to be separated from each other toward the outer peripheral side from the central axis side of the rotor core 31. The 40 magnet pressing portions 41 have a pair of magnet contact surfaces 41 a formed so as to be closer to each other toward the support column 42 from the outer peripheral side. Thereby, by using the magnet fixing member 40, the pair of permanent magnets 50 can be easily and firmly arranged in a V shape with respect to one magnet support recess 32. Further, the rotor core 31 has an insertion hole portion 33 into which the attachment portion 45 of the magnet fixing member 40 is inserted on the central axis side of the magnet support recess 32, and the attachment portion 45 between the insertion hole portion 33 and the magnet fixing member 40. Is filled with a non-magnetic material 36 such as resin. Thereby, the magnet fixing member 40 and thus the permanent magnet 50 can be firmly fixed to the rotor core 31 by firmly fixing the attachment portion 45 to the rotor core 41. Further, by filling the gap between the insertion hole 33 and the mounting portion 45 with the nonmagnetic material 36, the mounting portion 45 and the column portion 42, that is, the magnet fixing member 40 are magnetically insulated from the rotor core 31 by the nonmagnetic material 36. Therefore, the leakage of magnetic flux from the permanent magnet 50 can be suppressed more favorably. In the embodiment, the bottom 32 b of the magnet support recess 32 is widened so as to define a space on both sides of the support column 42. Thereby, it becomes possible to suppress the wraparound of the magnetic flux through the mounting portion 45 and the column portion 42 of the magnet fixing member 40, that is, the magnetic flux leakage more satisfactorily. In order to enlarge the space in the vicinity of the column portion 42, as shown in FIG. 4, a recess 41b may be formed on the inner peripheral side of the magnet pressing portion 41 of the magnet fixing member 40, that is, in the vicinity of the base end of the column portion 42. . Further, the rotor 30 of the embodiment is configured by mounting a plurality of separate magnet fixing members 40 on the outer periphery of the rotor core 31, and if the magnet fixing member 40 has high magnetic performance, The rotor core 31 itself is not required to have such a high magnetic performance. Therefore, in the rotor 30 of the embodiment, the rotor core 31 is formed of a metal having a relatively low magnetic performance, a non-magnetic material, or the like, thereby making it possible to improve motor performance such as cost reduction and quietness.

ここで、上記実施例の主要な要素と課題を解決するための手段の欄に記載した発明の主要な要素との対応関係について説明しておく。すなわち、上記実施例においては、複数の永久磁石５０を有し、ステータ２０と共にモータ１０を構成するロータが「電動機ロータ」に相当し、それぞれ一対の永久磁石５０を支持するように形成された複数の磁石支持凹部３２を有するロータコア３１が「ロータコア」に相当し、ロータコア３１と接触することなく磁石支持凹部３２により支持された一対の永久磁石５０と当接するように当該磁石支持凹部３２に配置される磁石押さえ部４１と、磁石押さえ部４１から延出された支柱部４２と、支柱部４２の磁石押さえ部４１とは反対側の端部に設けられてロータコア３１に対して固定される取付部４５とを含む複数の磁石固定部材４０が「磁石固定部材」に相当し、ロータコア４１の中心軸側から外周側に向かうほど互いに離間するように磁石支持凹部３２に形成された一対の磁石支持面３２ａが「磁石支持面」に相当し、外周側から支柱部４２に向かうほど互いに近接するように磁石押さえ部４１に形成された一対の磁石当接面４１ａが「磁石当接面」に相当し、ロータコア３１に形成された挿入孔部３３が「孔部」に相当し、挿入孔部３３と磁石固定部材４０の取付部４５との間隙に充填される非磁性体３６が「非磁性体」に相当する。   Here, the correspondence between the main elements of the above embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In other words, in the above-described embodiment, the rotor that includes the plurality of permanent magnets 50 and that constitutes the motor 10 together with the stator 20 corresponds to the “motor rotor”, and is formed to support the pair of permanent magnets 50. The rotor core 31 having the magnet support recess 32 corresponds to a “rotor core” and is disposed in the magnet support recess 32 so as to abut on the pair of permanent magnets 50 supported by the magnet support recess 32 without contacting the rotor core 31. Magnet holding part 41, a column part 42 extending from the magnet holding part 41, and an attachment part provided at the end of the column part 42 opposite to the magnet holding part 41 and fixed to the rotor core 31. The plurality of magnet fixing members 40 including 45 correspond to “magnet fixing members” and are separated from each other toward the outer peripheral side from the central axis side of the rotor core 41. The pair of magnet support surfaces 32 a formed in the magnet support recess 32 corresponds to a “magnet support surface”, and a pair of magnet contacts formed on the magnet pressing portion 41 so as to approach each other toward the support column 42 from the outer peripheral side. The contact surface 41 a corresponds to a “magnet contact surface”, the insertion hole 33 formed in the rotor core 31 corresponds to a “hole”, and is formed in the gap between the insertion hole 33 and the mounting portion 45 of the magnet fixing member 40. The filled nonmagnetic material 36 corresponds to a “nonmagnetic material”.

ただし、これら実施例の主要な要素と課題を解決するための手段の欄に記載した発明の主要な要素との対応関係は、実施例が課題を解決するための手段の欄に記載した発明を実施するための形態を具体的に説明するための一例であることから、課題を解決するための手段の欄に記載した発明の要素を限定するものではない。すなわち、実施例はあくまで課題を解決するための手段の欄に記載した発明の具体的な一例に過ぎず、課題を解決するための手段の欄に記載した発明の解釈は、その欄の記載に基づいて行なわれるべきものである。   However, the correspondence between the main elements of these embodiments and the main elements of the invention described in the column of means for solving the problems is the same as that of the invention described in the column of means for solving the problems by the embodiments. Since it is an example for demonstrating the form for implementing concretely, the element of the invention described in the column of the means for solving a subject is not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is described in the description of that column. Should be done on the basis.

以上、実施例を用いて本発明の実施の形態について説明したが、本発明は上記実施例に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲内において、様々な変更をなし得ることはいうまでもない。   The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

本発明は、電動機の製造産業等において利用可能である。   The present invention can be used in the motor manufacturing industry and the like.

１０ モータ、１５ 回転シャフト、２０ ステータ、２１ ステータコア、２２Ｕ Ｕ相コイル、２２Ｖ Ｖ相コイル、２２Ｗ Ｗ相コイル、３０ ロータ、３１ ロータコア、３１ａ 中心孔、３２ 磁石支持凹部、３２ａ 磁石支持面、３２ｂ 底部、３３ 挿入孔部、３６ 非磁性体、４０ 磁石固定部材、４１ 磁石押さえ部、４１ａ 磁石当接面、４１ｂ 凹部、４２ 支柱部、４４ 張り出し部、４５ 取付部、５０ 永久磁石。   10 motor, 15 rotating shaft, 20 stator, 21 stator core, 22U U phase coil, 22V V phase coil, 22W W phase coil, 30 rotor, 31 rotor core, 31a center hole, 32 magnet support recess, 32a magnet support surface, 32b bottom , 33 Insertion hole part, 36 Non-magnetic material, 40 Magnet fixing member, 41 Magnet pressing part, 41a Magnet contact surface, 41b Recessed part, 42 Supporting part, 44 Overhang part, 45 Mounting part, 50 Permanent magnet.

Claims (4)

複数の磁石を有し、ステータと共に電動機を構成する電動機ロータであって、
それぞれ一対の前記磁石を支持するように形成された複数の磁石支持凹部を有するロータコアと、
前記ロータコアと接触することなく前記磁石支持凹部により支持された前記一対の磁石と当接するように該磁石支持凹部に配置される磁石押さえ部と、該磁石押さえ部から延出された支柱部と、前記支柱部の前記磁石押さえ部とは反対側の端部に設けられて前記ロータコアに対して固定される取付部とを含む複数の磁石固定部材と、
を備える電動機ロータ。 An electric motor rotor having a plurality of magnets and constituting an electric motor together with a stator,
A rotor core having a plurality of magnet support recesses each formed to support a pair of the magnets;
A magnet pressing portion disposed in the magnet support recess so as to contact the pair of magnets supported by the magnet support recess without contacting the rotor core, and a column portion extending from the magnet pressing portion; A plurality of magnet fixing members including an attachment portion that is provided at an end of the column portion opposite to the magnet pressing portion and is fixed to the rotor core;
An electric motor rotor. 請求項１に記載の電動機ロータにおいて、
前記ロータコアの前記磁石支持凹部は、該ロータコアの中心軸側から外周側に向かうほど互いに離間するように形成された一対の磁石支持面を有し、
前記磁石固定部材の前記磁石押さえ部は、外周側から前記支柱部に向かうほど互いに近接するように形成された一対の磁石当接面を有する電動機ロータ。 The motor rotor according to claim 1,
The magnet support recess of the rotor core has a pair of magnet support surfaces formed so as to be separated from each other toward the outer peripheral side from the central axis side of the rotor core,
The motor rotor having a pair of magnet contact surfaces formed such that the magnet pressing portion of the magnet fixing member is closer to each other as it goes from the outer peripheral side toward the support column. 請求項１または２に記載の電動機ロータにおいて、
前記ロータコアは、前記磁石支持凹部の中心軸側に前記磁石固定部材の前記取付部が挿入される孔部を有し、該孔部と前記磁石固定部材の前記取付部との間隙には、非磁性体が充填される電動機ロータ。 In the motor rotor according to claim 1 or 2,
The rotor core has a hole portion into which the mounting portion of the magnet fixing member is inserted on the central axis side of the magnet support recess, and a gap between the hole portion and the mounting portion of the magnet fixing member is not An electric motor rotor filled with a magnetic material. 請求項１から３の何れか一項に記載の電動機ロータにおいて、
前記ロータコアの前記磁石支持凹部は、前記磁石固定部材の前記支柱部の両側に空間を画成するように形成されている電動機ロータ。 In the electric motor rotor according to any one of claims 1 to 3,
The electric motor rotor formed so that the magnet support recessed part of the rotor core may define a space on both sides of the support column part of the magnet fixing member.
JP2009261436A 2009-11-17 2009-11-17 Electric motor rotor Pending JP2011109786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009261436A JP2011109786A (en) 2009-11-17 2009-11-17 Electric motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009261436A JP2011109786A (en) 2009-11-17 2009-11-17 Electric motor rotor

Publications (1)

Publication Number Publication Date
JP2011109786A true JP2011109786A (en) 2011-06-02

Family

ID=44232661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009261436A Pending JP2011109786A (en) 2009-11-17 2009-11-17 Electric motor rotor

Country Status (1)

Country Link
JP (1) JP2011109786A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046421A (en) * 2011-08-21 2013-03-04 Toyota Industries Corp Permanent magnet embedded electric motor
JP2013074694A (en) * 2011-09-27 2013-04-22 Toyota Industries Corp Permanent magnet buried electric motor
KR101307058B1 (en) * 2012-03-06 2013-09-11 한양대학교 에리카산학협력단 Permanent magnet dc motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046421A (en) * 2011-08-21 2013-03-04 Toyota Industries Corp Permanent magnet embedded electric motor
CN102957239A (en) * 2011-08-21 2013-03-06 株式会社丰田自动织机 Interior permanent magnet motor
JP2013074694A (en) * 2011-09-27 2013-04-22 Toyota Industries Corp Permanent magnet buried electric motor
KR101307058B1 (en) * 2012-03-06 2013-09-11 한양대학교 에리카산학협력단 Permanent magnet dc motor

Similar Documents

Publication Publication Date Title
CN108075585B (en) Rotating electrical machine
US9130441B2 (en) Brushless DC motor
US9923436B2 (en) Rotor for a rotary electric machine
US20130207507A1 (en) Rotor assembly for motor and manufacturing method thereof
JP5074350B2 (en) Magnetic bearing
KR101761182B1 (en) Motor
US20170331336A1 (en) Stator core for rotating electrical machine, rotating electrical machine, and method of manufacturing rotating electrical machine
JP5617313B2 (en) Assembly method of rotating electrical machine
US9806569B2 (en) Hybrid excitation rotating electrical machine
US9356479B2 (en) Hybrid excitation rotating electrical machine
JP2008278591A (en) Rotor of rotating electric machine and rotating electric machine
JP5347588B2 (en) Embedded magnet motor
JP2008278553A (en) Rotor of rotating electric machine and rotating electric machine
JP2016005350A (en) Axial gap rotary electric machine
JP2008312318A (en) Rotor of rotary electric machine, and rotary electric machine
JP2008193842A (en) Axial gap type rotating electric machine
JP2011109786A (en) Electric motor rotor
JP4771010B1 (en) Rotating electric machine and wind power generation system
JP2014073011A (en) Stator for rotary electric machine and rotary electric machine
JP2011125163A (en) Motor rotor
JP2011229263A (en) Electric motor rotor
JP2012249389A (en) Rotor for rotary electric machine, and rotary electric machine using the same
JP2013090461A (en) Stator of axial gap type rotary electric machine, and axial gap type rotary electric machine
US11289963B2 (en) Rotor, motor, and electric power steering device
JP2013219947A (en) Stator core and rotary motor using the same