JP7037970B2 - Rotor, rotary electric machine and rotor magnet mounting method - Google Patents

Rotor, rotary electric machine and rotor magnet mounting method Download PDF

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JP7037970B2
JP7037970B2 JP2018048710A JP2018048710A JP7037970B2 JP 7037970 B2 JP7037970 B2 JP 7037970B2 JP 2018048710 A JP2018048710 A JP 2018048710A JP 2018048710 A JP2018048710 A JP 2018048710A JP 7037970 B2 JP7037970 B2 JP 7037970B2
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magnet
rotor
holder
peripheral surface
fastening
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JP2019161958A (en
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アンドレイ ピディン
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Description

本発明は、ロータ、回転電機及びロータの磁石取付方法に関する。 The present invention relates to a rotor, a rotary electric machine, and a method for mounting a magnet on the rotor.

ＳＰＭ式回転電機（例えば、表面磁石型同期モータ：Surface Permanent Magnet Synchronous Motor）では、磁石がロータの表面に設けられている。そこで、当該ロータでは、磁石が遠心力で飛散しないように磁石の外表面上に炭素繊維などで構成される補強材を巻いている（特許文献１参照）。 In an SPM type rotary electric machine (for example, a Surface Permanent Magnet Synchronous Motor), a magnet is provided on the surface of the rotor. Therefore, in the rotor, a reinforcing material made of carbon fiber or the like is wound on the outer surface of the magnet so that the magnet does not scatter due to centrifugal force (see Patent Document 1).

特開２０１１－１８８６１２号公報Japanese Unexamined Patent Publication No. 2011-188612

しかしながら、前記特許文献１の技術は、磁石も含めてロータの外表面に単純に補強材を巻いているだけである。そのため、かかる技術では、磁石が遠心力で飛び出すのを防止するために、補強材の張力を効果的に使うことができていない。よって、前記特許文献１の技術では、補強材で磁石を効果的にロータコアにとどめておくことができないという不具合がある。 However, the technique of Patent Document 1 simply winds a reinforcing material on the outer surface of the rotor including the magnet. Therefore, in such a technique, the tension of the reinforcing material cannot be effectively used in order to prevent the magnet from popping out due to centrifugal force. Therefore, the technique of Patent Document 1 has a problem that the magnet cannot be effectively retained in the rotor core by the reinforcing material.

本発明の課題は、磁石保持部の張力を効果的に使って、磁石を効果的にロータコア上に保持させることができるロータ、回転電機及びロータの磁石取付方法を提供することである。 An object of the present invention is to provide a magnet mounting method for a rotor, a rotary electric machine and a rotor capable of effectively holding a magnet on a rotor core by effectively using the tension of the magnet holding portion.

本発明のロータは、ＳＰＭ式回転電機のロータであって、ロータコアと、前記ロータコアの周面に設けられる磁石と、前記磁石を前記周面に保持させる磁石保持部とを備え、前記磁石保持部は、前記ロータコアの周面から半径方向内部にかけて形成された複数の溝部と、前記磁石を前記周面上で覆って当該磁石を当該周面上に保持し、当該覆う部分の両端側がそれぞれ異なる前記溝部内に入り込んでいる保持具と、前記各溝部の前記ロータコアの奥側に設けられ前記保持具が当該溝部から抜け出すのを防止するように当該保持具を止着する止着部と、を備え、前記止着部は、前記ロータコアの周方向に千鳥状に複数個配置されていることを特徴とする。 The rotor of the present invention is a rotor of an SPM type rotary electric machine, and includes a rotor core, a magnet provided on the peripheral surface of the rotor core, and a magnet holding portion for holding the magnet on the peripheral surface, and the magnet holding portion. Is a plurality of grooves formed from the peripheral surface of the rotor core to the inside in the radial direction, and the magnet is covered on the peripheral surface to hold the magnet on the peripheral surface, and both ends of the covering portion are different from each other. It is provided with a holder that has entered the groove and a fastener that is provided on the inner side of the rotor core of each groove and that fastens the holder so as to prevent the holder from coming out of the groove . A plurality of the fastening portions are arranged in a staggered manner in the circumferential direction of the rotor core .

別の本発明のロータの磁石取付方法は、周面から半径方向内部にかけて複数の溝部が形成されたロータコアの一つの前記溝部に保持具を２枚折りして収納する第１収納工程と、前記保持具を収納した溝部の奥側に設けられた止着部で当該保持具を止着する第１止着工程と、前記保持具を止着した溝部である止着溝部と当該止着溝部に隣接する前記溝部である隣接溝部の２つの溝部間に位置する前記周面上に磁極を構成するための磁石を配置する配置工程と、前記隣接溝部に前記止着溝部から飛び出している前記保持具の２枚折りの一枚を再度２枚折りして収納する第２収納工程と、前記保持具で前記磁石を前記周面に押さえつけた状態で、前記隣接溝部の奥側に設けられた止着部で当該保持具を止着する第２止着工程とを備えることを特徴とする。 Another method for mounting the magnet of the rotor of the present invention includes a first storage step of folding and storing the holder in two in the groove of one of the rotor cores in which a plurality of grooves are formed from the peripheral surface to the inside in the radial direction. The first fastening step of fastening the holder at the fastening portion provided on the back side of the groove containing the holder, and the fastening groove portion and the fastening groove portion which are the grooves where the holder is fastened. An arrangement step of arranging a magnet for forming a magnetic pole on the peripheral surface located between two grooves of the adjacent groove portion which is the adjacent groove portion, and the holding tool protruding from the fastening groove portion in the adjacent groove portion. The second storage step of folding one of the two folds again and storing it, and the fastening provided on the back side of the adjacent groove portion with the magnet pressed against the peripheral surface by the holder. It is characterized by comprising a second fastening step of fastening the holder at the portion.

本発明によれば、磁石保持部の張力を効果的に使って、磁石を効果的にロータコア上に保持させることができるロータ、回転電機及びロータの磁石取付方法を提供できる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a magnet mounting method for a rotor, a rotary electric machine and a rotor capable of effectively holding a magnet on a rotor core by effectively using the tension of the magnet holding portion.

本発明の一実施形態に係るロータの斜視図である。It is a perspective view of the rotor which concerns on one Embodiment of this invention. （ａ）は、本発明の一実施形態に係るロータを径方向に切断した部分断面図であり、（ｂ）は、（ａ）のＡ部分（１つの磁極部分）の拡大図である。(A) is a partial cross-sectional view of a rotor according to an embodiment of the present invention cut in the radial direction, and (b) is an enlarged view of a portion A (one magnetic pole portion) of (a). 本発明の一実施形態に係るロータの磁石取付方法の第２工程を説明するロータコアの部分断面図である。It is a partial sectional view of the rotor core explaining the 2nd step of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の予備工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the preliminary process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第３工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the 3rd process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第３工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the 3rd process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第４工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the 4th process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第４工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the 4th process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第５工程及び第６工程を説明するロータコアの部分断面図である。It is a partial sectional view of the rotor core explaining the 5th step and the 6th step of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの磁石取付方法の第７工程を説明するロータコアの部分断面図である。It is a partial cross-sectional view of the rotor core which explains the 7th process of the magnet mounting method of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に係るロータの作用効果を説明するロータの単一の磁極部分の径方向断面図である。It is a radial cross-sectional view of the single magnetic pole part of the rotor which explains the action effect of the rotor which concerns on one Embodiment of this invention. 本発明の一実施形態に対する比較例であるロータの作用効果を説明するロータの部分断面図である。It is a partial cross-sectional view of the rotor explaining the action effect of the rotor which is a comparative example with respect to one Embodiment of this invention.

以下本発明の一実施形態について図面を参照しつつ説明する。
図１は、本実施形態に係るＳＰＭ式回転電機、ここでは表面磁石型同期モータ（ＳＰＭＳＭ：Surface Permanent Magnet Synchronous Motor）のロータ１の斜視図である。このロータ１は、表面磁石型同期モータのインナーロータであり、回転軸２と、この回転中心としての回転軸２に固定された円柱状のロータコア３とを備えている。
ロータコア３の周面３ａには、例えば４つの磁極４が設けられている。各磁極４は、例えば６本の磁石１１を連続的にロータコア３の周方向に並べて形成されている。各磁石１１は、ロータコア３の長さと略同じ長さである。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a rotor 1 of an SPM type rotary electric machine according to the present embodiment, here, a surface magnet type synchronous motor (SPMSM: Surface Permanent Magnet Synchronous Motor). The rotor 1 is an inner rotor of a surface magnet type synchronous motor, and includes a rotating shaft 2 and a columnar rotor core 3 fixed to the rotating shaft 2 as a rotation center thereof.
For example, four magnetic poles 4 are provided on the peripheral surface 3a of the rotor core 3. Each magnetic pole 4 is formed, for example, by arranging six magnets 11 continuously in the circumferential direction of the rotor core 3. Each magnet 11 has substantially the same length as the length of the rotor core 3.

図２（ａ）は、ロータ１を径方向に切断した部分断面図であり、図２（ｂ）は、図２（ａ）のＡ部分（１つの磁極４部分）の拡大図である。各磁極４が形成されるロータコア３の周面３ａには、磁石１１を収納する凹状の磁石収納凹部３ｂが形成されている。そして、各磁石収納凹部３ｂには、各６本の磁石１１が収納され、磁石保持部１２によってロータコア３の周面３ａ（磁石収納凹部３ｂ内）に保持されている。
磁石保持部１２は、溝部１３、保持具１４及び止着部１５を備えている。 FIG. 2A is a partial cross-sectional view of the rotor 1 cut in the radial direction, and FIG. 2B is an enlarged view of a portion A (one magnetic pole 4 portion) of FIG. 2A. A concave magnet accommodating recess 3b for accommodating the magnet 11 is formed on the peripheral surface 3a of the rotor core 3 on which each magnetic pole 4 is formed. Each of the six magnets 11 is housed in each magnet storage recess 3b, and is held by the magnet holding portion 12 on the peripheral surface 3a (inside the magnet storage recess 3b) of the rotor core 3.
The magnet holding portion 12 includes a groove portion 13, a holder 14, and a fastening portion 15.

まず、磁石保持部１２は、ロータコア３の周面３ａから半径方向内部にかけて形成された複数の溝部１３を備えている。溝部１３は、磁石収納凹部３ｂ内に形成されている。本例では磁極４ごとに７本の溝部１３が形成されている。すなわち、各磁極４における溝部１３の本数は当該磁極４に設けられた磁石１１の数より１本多い。この各溝部１３は、長手方向がロータコア３の長手方向であり、ロータコア３の長さの端から端まで形成されている。各磁極４において、隣り合う溝部１３同士の間隔は略同じである。そして、各磁極４において、各溝部１３の深さは、ロータコア３の周方向に浅いものと深いものが交互に出現する。 First, the magnet holding portion 12 includes a plurality of groove portions 13 formed from the peripheral surface 3a of the rotor core 3 to the inside in the radial direction. The groove portion 13 is formed in the magnet storage recess 3b. In this example, seven groove portions 13 are formed for each magnetic pole 4. That is, the number of groove portions 13 in each magnetic pole 4 is one more than the number of magnets 11 provided in the magnetic pole 4. The longitudinal direction of each of the groove portions 13 is the longitudinal direction of the rotor core 3, and the groove portions 13 are formed from one end to the other of the length of the rotor core 3. At each magnetic pole 4, the distance between adjacent groove portions 13 is substantially the same. Then, in each magnetic pole 4, shallow and deep grooves appear alternately in the circumferential direction of the rotor core 3.

保持具１４は、シート状の部材であり、例えば炭素繊維など、可撓性を有する強靭な材料で形成されている。保持具１４は、各磁石１１をロータコア３の周面３ａ上で覆って磁石１１を周面３ａ上に保持している。保持具１４は、各磁石１１を覆う部分の両端１４ａ，１４ａ側がそれぞれ隣り合う溝部１３，１３内に入り込んでいる。具体的には、保持具１４は２枚折りして各溝部１３内に入り込んでいる。そして、少なくとも単一の磁極４においては、全ての溝部１３に１枚の保持具１４が入り込んでいる。なお、全ての磁極４において、１枚の保持具１４を各溝部１３に入れるようにしてもよい。 The holder 14 is a sheet-like member and is made of a flexible and tough material such as carbon fiber. The holder 14 covers each magnet 11 on the peripheral surface 3a of the rotor core 3 and holds the magnet 11 on the peripheral surface 3a. In the holder 14, both ends 14a and 14a of the portion covering each magnet 11 are inserted into the adjacent groove portions 13 and 13, respectively. Specifically, the holder 14 is folded in two and enters each groove portion 13. And, in at least a single magnetic pole 4, one holder 14 is inserted in all the grooves 13. It should be noted that one holder 14 may be inserted into each groove 13 at all the magnetic poles 4.

また、各溝部１３のロータコア３の奥側、例えば最深部には、保持具１４が当該溝部１３から抜け出すのを防止するように保持具１４を止着する止着部１５が設けられている。すなわち、各溝部１３の最深部には当該溝部１３の幅より直径が長い径方向断面が略円形である孔である円筒１５ａが形成されている。この円筒１５ａの長手方向はロータ１の長手方向と同じである。２枚折りした保持具１４の折られている部分は円筒１５ａ内で当該円筒１５ａの内周面に沿うように拡がっている。これにより、保持具１４の２枚折り部分も円筒形状をなしていて、その内部には、拡径部材１５ｂが長手方向を円筒１５ａの長手方向として収納されている。すなわち、拡径部材１５ｂは、例えばコイルスプリングのような部材であり、円筒１５ａ内で保持具１４の２つ折り部分の内側で弾性的に拡径している。これにより、拡径部材１５ｂは、保持具１４を円筒状に拡げて円筒１５ａの内周面に保持具１４を押しつけている。円筒１５ａは溝部１３の幅より直径が長いため、ロータコア３の外部から保持具１４が引っ張られても拡径部材１５ｂが円筒１５ａ内で突っ張る。そのため、保持具１４は溝部１３内から抜けず、保持具１４は止着部１５により止着される。 Further, on the inner side of the rotor core 3 of each groove portion 13, for example, the deepest portion, a fastening portion 15 for fastening the holding tool 14 is provided so as to prevent the holding tool 14 from coming out of the groove portion 13. That is, a cylinder 15a, which is a hole having a substantially circular radial cross section and having a diameter longer than the width of the groove portion 13, is formed in the deepest portion of each groove portion 13. The longitudinal direction of the cylinder 15a is the same as the longitudinal direction of the rotor 1. The folded portion of the two-folded holder 14 extends within the cylinder 15a along the inner peripheral surface of the cylinder 15a. As a result, the double-folded portion of the holder 14 also has a cylindrical shape, and the diameter-expanding member 15b is housed inside the holder 14 with the longitudinal direction as the longitudinal direction of the cylinder 15a. That is, the diameter-expanding member 15b is a member such as a coil spring, and elastically expands in diameter inside the folded portion of the holder 14 in the cylinder 15a. As a result, the diameter-expanding member 15b expands the holder 14 in a cylindrical shape and presses the holder 14 against the inner peripheral surface of the cylinder 15a. Since the cylinder 15a has a diameter longer than the width of the groove 13, the diameter-expanding member 15b stretches inside the cylinder 15a even if the holder 14 is pulled from the outside of the rotor core 3. Therefore, the holder 14 does not come out of the groove 13, and the holder 14 is fastened by the fastening portion 15.

各磁極４において、各止着部１５は、ロータコア３の周方向に千鳥状に配置されている。すなわち、各磁極４において、周方向に視て各止着部１５は浅い溝部１３の最深部に設けられているものと、深い溝部の最深部に設けられているものとが交互に出現する。なお、各止着部１５は、溝部１３の最深部に設けられている必要は必ずしもなく、溝部１３の深さの中間地点に設けられていてもよい。 At each magnetic pole 4, each fastening portion 15 is arranged in a staggered manner in the circumferential direction of the rotor core 3. That is, in each magnetic pole 4, the anchoring portion 15 provided in the deepest portion of the shallow groove portion 13 and the one provided in the deepest portion of the deep groove portion alternately appear alternately when viewed in the circumferential direction. It should be noted that each fastening portion 15 does not necessarily have to be provided at the deepest portion of the groove portion 13, and may be provided at an intermediate point of the depth of the groove portion 13.

このようにして、単一の磁極４に対して複数個、本例で６個の磁石１１が磁石保持部１２によりロータコア３の周面３ａ（磁石収納凹部３ｂ内）に保持される。単一の磁極４の各磁石１１を１枚の保持具１４で支持する場合、その磁極４におけるロータコア３の周方向両端側の各溝部１３内から１枚の保持具１４の両端部１４ｂ．１４ｂがはみ出す。この両端部１４ｂ，１４ｂは、接着その他の手段により、ロータコア３に止着して、溝部１３から保持具１４が飛び出さないようにするのが望ましい。また、全ての磁極４において１枚の保持具１４を使用する場合も、２つの溝部１３からそれぞれ保持具１４の端部がはみ出す。これもロータコア３にそれぞれ止着して、溝部１３から保持具１４が飛び出さないようにするのが望ましい。 In this way, a plurality of magnets 11 for a single magnetic pole 4, six magnets 11 in this example, are held by the magnet holding portion 12 on the peripheral surface 3a (inside the magnet accommodating recess 3b) of the rotor core 3. When each magnet 11 of a single magnetic pole 4 is supported by one holder 14, both ends 14 b. 14b sticks out. It is desirable that both end portions 14b and 14b are fixed to the rotor core 3 by adhesive or other means so that the holder 14 does not protrude from the groove portion 13. Further, even when one holder 14 is used for all the magnetic poles 4, the end portions of the holders 14 protrude from the two groove portions 13, respectively. It is desirable that this is also fixed to the rotor core 3 so that the holder 14 does not pop out from the groove portion 13.

次に、前記の構造のロータ１を製造するためのロータの磁石取付方法について説明する。ロータの磁石取付方法は、第１工程から第７工程までの各工程を順次行うことにより実施する。
（１）第１工程
ロータの磁石取付方法で必要なのは、前記の構造のロータコア３、保持具１４、拡径部材１５ｂ、さらに細いワイヤ５１（図３Ａ）である。作業者はこれらを準備する。 Next, a method for attaching a magnet to the rotor for manufacturing the rotor 1 having the above structure will be described. The rotor magnet mounting method is carried out by sequentially performing each step from the first step to the seventh step.
(1) First Step The rotor magnet mounting method requires a rotor core 3, a holder 14, a diameter-expanding member 15b, and a finer wire 51 (FIG. 3A) having the above-mentioned structure. The worker prepares these.

（２）第２工程（第１収納工程）
図３Ａに示すように、作業者は保持具１４を磁極４の一番端に位置する溝部１３内に挿入する（矢印ａ）。この場合、溝部１３が狭いので、保持具１４にワイヤ５１を掛けて円筒１５ａに達するまでワイヤ５１を溝部１３に通すことで保持具１４を挿入する。保持具１４にワイヤ５１を掛けて溝部１３内に押し通すに際しては、ワイヤ５１により保持具１４は２枚折りの状態になって溝部１３内に入っていく。
この場合に、溝部１３が狭くて、ワイヤ５１を使って保持具１４を挿入しにくい場合には、事前に第２工程の前の予備工程を行う。すなわち、作業者は「ロータコア３を、液体窒素等を用いて冷却し、図３Ｂに矢印ｂで示すように収縮させて、溝部１３の間隔を拡大する。 (2) Second step (first storage step)
As shown in FIG. 3A, the operator inserts the holder 14 into the groove 13 located at the end of the magnetic pole 4 (arrow a). In this case, since the groove 13 is narrow, the holder 14 is inserted by hanging the wire 51 on the holder 14 and passing the wire 51 through the groove 13 until the wire 51 reaches the cylinder 15a. When the wire 51 is hung on the holder 14 and pushed through the groove portion 13, the holder 14 is folded in half by the wire 51 and enters the groove portion 13.
In this case, if the groove portion 13 is narrow and it is difficult to insert the holder 14 using the wire 51, a preliminary step before the second step is performed in advance. That is, the operator "cools the rotor core 3 with liquid nitrogen or the like and contracts it as shown by an arrow b in FIG. 3B to increase the distance between the groove portions 13.

（３）第３工程
保持具１４が円筒１５ａまで達したら、図３Ｃに示すように、円筒１５ａ内で保持具１４を袋状に拡げる。この場合、保持具１４をロータコア３の外側から溝部１３を介して円筒１５ａ内に送り込むことによって保持具１４を袋状に拡げてもよい。あるいは、引き続きワイヤ５１を用いて、保持具１４を円筒１５ａの内周面に押しつけるようにしてもよい。図３Ｃではワイヤ５１を用いている。
これによって、作業者は、図３Ｄに示すように、円筒１５ａの内周面全面に保持具１４を接触させ、円筒１５ａ内で保持具１４を円筒状部１４ｃにする。 (3) Third Step When the holder 14 reaches the cylinder 15a, the holder 14 is spread in a bag shape in the cylinder 15a as shown in FIG. 3C. In this case, the holder 14 may be expanded in a bag shape by feeding the holder 14 from the outside of the rotor core 3 into the cylinder 15a through the groove portion 13. Alternatively, the wire 51 may be continuously used to press the holder 14 against the inner peripheral surface of the cylinder 15a. In FIG. 3C, the wire 51 is used.
As a result, as shown in FIG. 3D, the operator brings the holder 14 into contact with the entire inner peripheral surface of the cylinder 15a, and makes the holder 14 into the cylindrical portion 14c in the cylinder 15a.

（４）第４工程（第１止着工程）
図３Ｅに示すように、作業者は、長手方向に引き延ばして径サイズを縮小した拡径部材１５ｂを、円筒状部１４ｃ内に挿入する。この拡径部材１５ｂの挿入は、可能であれば溝部１３内から行ってもよいし、ロータコア３の端面に形成されている円筒１５ａの開口から行ってもよい。 (4) Fourth step (first fastening step)
As shown in FIG. 3E, the operator inserts the diameter-expanding member 15b, which is stretched in the longitudinal direction to reduce the diameter size, into the cylindrical portion 14c. The diameter-expanding member 15b may be inserted from inside the groove 13 if possible, or may be inserted from the opening of the cylinder 15a formed on the end face of the rotor core 3.

次に、図３Ｆに示すように、作業者は、拡径部材１５ｂの長手方向への引き延ばしを解除し、拡径部材１５ｂの径サイズを弾性的に拡大する。これにより、拡径部材１５ｂの径サイズが拡大し、保持具１４を円筒状部１４ｃの内周面に内側から押しつける。これにより、円筒状部１４ｃは円筒１５ａの内周面に内側から押しつけられる。円筒１５ａの直径は溝部１３の幅より長いため、円筒１５ａ内の保持具１４は溝部１３を通って円筒１５ａ外に抜けることはない。すなわち、円筒１５ａ内に止着部１５が形成される。 Next, as shown in FIG. 3F, the operator cancels the stretching of the diameter-expanding member 15b in the longitudinal direction and elastically expands the diameter size of the diameter-expanding member 15b. As a result, the diameter size of the diameter-expanding member 15b is expanded, and the holder 14 is pressed against the inner peripheral surface of the cylindrical portion 14c from the inside. As a result, the cylindrical portion 14c is pressed from the inside against the inner peripheral surface of the cylinder 15a. Since the diameter of the cylinder 15a is longer than the width of the groove 13, the holder 14 in the cylinder 15a does not pass through the groove 13 and escape from the cylinder 15a. That is, the fastening portion 15 is formed in the cylinder 15a.

（５）第５工程（配置工程）
図３Ｇに示すように、止着部１５が形成された溝部１３と、当該止着溝部１３１と隣接する溝部との間に位置するロータコア３の周面３ａ上（磁石収納凹部３ｂ内）に磁石１１を配置する。止着部１５が形成された溝部１３は止着溝部１３１となり、これに隣接する溝部１３は隣接溝部１３２となる。
なお、磁石１１は、磁石収納凹部３ｂ内に接着剤その他の手段で固定することが望ましい。 (5) Fifth step (arrangement step)
As shown in FIG. 3G, a magnet is placed on the peripheral surface 3a (inside the magnet storage recess 3b) of the rotor core 3 located between the groove portion 13 in which the fastening portion 15 is formed and the groove portion adjacent to the fastening groove portion 131. 11 is placed. The groove portion 13 in which the fastening portion 15 is formed becomes the fastening groove portion 131, and the groove portion 13 adjacent to the groove portion 13 becomes the adjacent groove portion 132.
It is desirable that the magnet 11 is fixed in the magnet storage recess 3b by an adhesive or other means.

（６）第６工程（第２収納工程）
図３Ｇに示すように、作業者は、第２工程と同様な方法によって、止着溝部１３１から飛び出している隣接溝部１３２側の保持具１４を隣接溝部１３２に挿入する。 (6) 6th process (2nd storage process)
As shown in FIG. 3G, the operator inserts the holder 14 on the adjacent groove portion 132 side protruding from the fastening groove portion 131 into the adjacent groove portion 132 by the same method as in the second step.

（７）第７工程（第２止着工程）
図３Ｈに示すように、作業者は、第３工程及び第４工程と同様な方法によって、隣接溝部１３２の円筒１５ａ内に止着部１５を形成する。このとき、保持具１４を張って、保持具１４によって第５工程で配置した磁石１１をロータコア３の周面３ａ（磁石収納凹部３ｂ内）に押さえつけた状態とする。 (7) 7th step (2nd fastening step)
As shown in FIG. 3H, the operator forms the fastening portion 15 in the cylinder 15a of the adjacent groove portion 132 by the same method as in the third step and the fourth step. At this time, the holder 14 is stretched so that the magnet 11 arranged in the fifth step is pressed against the peripheral surface 3a (inside the magnet storage recess 3b) of the rotor core 3.

以下、図３Ｈに示すように、第２工程～第７工程を繰り返すことにより、磁石収納凹部３ｂ内の一方側から他方側に順次１個ずつ磁石１１を取り付ける。本例で６個の磁石１１が取り付けられることにより、単一の磁極４が形成される。他の磁極４も同様の手段により形成する。 Hereinafter, as shown in FIG. 3H, by repeating the second step to the seventh step, one magnet 11 is sequentially attached from one side to the other side in the magnet storage recess 3b. By attaching the six magnets 11 in this example, a single magnetic pole 4 is formed. The other magnetic poles 4 are also formed by the same means.

なお、単一の磁極４の各磁石１１を１枚の保持具１４で支持する場合、その磁極４におけるロータコア３の周方向両端側の各溝部１３内から１枚の保持具１４の両端部１４ｂ，１４ｂがはみ出す。この両端部１４ｂ，１４ｂは、接着その他の手段により、ロータコア３に止着して、溝部１３から保持具１４が飛び出さないようにするのが望ましい。また、全ての磁極４において１枚の保持具１４を使用する場合も、２つの溝部１３からそれぞれ保持具１４の端部がはみ出す。これもロータコア３にそれぞれ止着して、溝部１３から保持具１４が飛び出さないようにするのが望ましい。なお、保持具１４の両端部１４ｂ，１４ｂは、磁石１１に生じる遠心力を受けることがないので、当該両端部１４ｂ，１４ｂがロータコア３の周面３ａから剥がれるおそれはない。 When each magnet 11 of a single magnetic pole 4 is supported by one holder 14, both ends 14b of one holder 14 from the inside of each groove 13 on both ends of the rotor core 3 in the circumferential direction of the magnetic pole 4. , 14b sticks out. It is desirable that both end portions 14b and 14b are fixed to the rotor core 3 by adhesive or other means so that the holder 14 does not protrude from the groove portion 13. Further, even when one holder 14 is used for all the magnetic poles 4, the end portions of the holders 14 protrude from the two groove portions 13, respectively. It is desirable that this is also fixed to the rotor core 3 so that the holder 14 does not pop out from the groove portion 13. Since both ends 14b and 14b of the holder 14 are not subjected to the centrifugal force generated by the magnet 11, there is no possibility that the both ends 14b and 14b will be peeled off from the peripheral surface 3a of the rotor core 3.

次に、本実施形態のロータ１の作用効果について説明する。
図５（ａ）は、本実施形態のロータ１の比較例となるロータ１０１の正面図である。このロータ１０１は、円筒状のロータコア１０２の周面１０３に４個の磁極１０４が設けられている。ここでは、便宜上、単一の磁極１０４は単一の磁石で形成されているものとする。ロータコア１０２には回転軸１０５が設けられている。磁極１０４を含めたロータコア１０２の周面１０３の全体には炭素繊維のシート１０６が巻かれている。これによって、遠心力でロータコア１０２から磁極（磁石）１０４が脱落するのを、その張力で防止している。 Next, the operation and effect of the rotor 1 of the present embodiment will be described.
FIG. 5A is a front view of the rotor 101 which is a comparative example of the rotor 1 of the present embodiment. The rotor 101 is provided with four magnetic poles 104 on the peripheral surface 103 of the cylindrical rotor core 102. Here, for convenience, it is assumed that the single magnetic pole 104 is formed of a single magnet. The rotor core 102 is provided with a rotating shaft 105. A carbon fiber sheet 106 is wound around the entire peripheral surface 103 of the rotor core 102 including the magnetic pole 104. As a result, the tension prevents the magnetic pole (magnet) 104 from falling off from the rotor core 102 due to centrifugal force.

図５（ｂ）は、ロータ１０１の単一の磁極（磁石）１０４とその磁極１０４を覆っているシート１０６の正面図である。矢印Ｆは、ロータ１０１の回転により磁極１０４にかかる遠心力を示している。また、矢印Ｔは、磁極１０４をロータコア１０２の周面１０３上に保持させる炭素繊維のシート１０６の張力を示している。 FIG. 5B is a front view of a single magnetic pole (magnet) 104 of the rotor 101 and a sheet 106 covering the magnetic pole 104. Arrow F indicates the centrifugal force applied to the magnetic pole 104 due to the rotation of the rotor 101. Further, the arrow T indicates the tension of the carbon fiber sheet 106 that holds the magnetic pole 104 on the peripheral surface 103 of the rotor core 102.

遠心力Ｆを張力Ｔで効果的に抑え込むには、張力Ｔの向きが遠心力Ｆの向きと真逆の向きになることが理想である。しかしながら、図（ｂ）に示すように、現実には、炭素繊維のシート１０６の幅方向はロータコア１０２の周面１０３の方向にある。そのため、炭素繊維のシート１０６による現実の張力Ｔと、前記の理想的な張力Ｔとの角度差は、図５（ｂ）に示す角度θである。当該角度θは大きな角度である。そのため、シート１０６の張力Ｔは磁極（磁石）１０４にかかる遠心力に抗して磁極（磁石）１０４をロータコア１０２にとどめるために効果的に使いきれてはいない。すなわち、張力Ｔの遠心力Ｆとは真逆である向きの成分の大きさは、張力Ｔの大きさに比べてだいぶ小さい。 In order to effectively suppress the centrifugal force F with the tension T, it is ideal that the direction of the tension T is the opposite of the direction of the centrifugal force F. However, as shown in FIG. (B), in reality, the width direction of the carbon fiber sheet 106 is the direction of the peripheral surface 103 of the rotor core 102. Therefore, the angle difference between the actual tension T due to the carbon fiber sheet 106 and the ideal tension T is the angle θ shown in FIG. 5 (b). The angle θ is a large angle. Therefore, the tension T of the sheet 106 is not effectively used up to keep the magnetic pole (magnet) 104 in the rotor core 102 against the centrifugal force applied to the magnetic pole (magnet) 104. That is, the magnitude of the component in the direction opposite to the centrifugal force F of the tension T is much smaller than the magnitude of the tension T.

これに対して、図４は、本実施形態のロータ１の単一の磁極４部分の径方向断面図である。なお、図４においては、便宜上、拡径部材１５ｂの図示は省略している。本実施形態では、遠心力Ｆに対抗する保持具１４の張力Ｔは、ロータコア３の半径方向下向きである（符号３１が半径の中心である）。本実施形態でも遠心力Ｆに最も効果的に対抗できる張力Ｔの向きは遠心力Ｆの向きと真逆の向きである。図４の例でも張力Ｔの向きは遠心力Ｆと真逆ではないが、その理想的な向きと現実の張力Ｔの向きとがなす角度θは、相当程度小さい。そのため、張力Ｔの遠心力Ｆとは真逆である向きの成分の大きさは、張力Ｔ自体の大きさと比べて大きな差はない。そのため、比較例のロータ１０１の場合におけるシート１０６に比べて、本実施形態のロータ１の保持具１４では、張力Ｔを効果的に活用して遠心力Ｆに対抗することができる。 On the other hand, FIG. 4 is a radial cross-sectional view of a single magnetic pole 4 portion of the rotor 1 of the present embodiment. In FIG. 4, the diameter-expanding member 15b is not shown for convenience. In the present embodiment, the tension T of the holder 14 against the centrifugal force F is downward in the radial direction of the rotor core 3 (reference numeral 31 is the center of the radius). Also in this embodiment, the direction of the tension T that can most effectively counter the centrifugal force F is the direction opposite to the direction of the centrifugal force F. Even in the example of FIG. 4, the direction of the tension T is not exactly the opposite of the centrifugal force F, but the angle θ between the ideal direction and the actual direction of the tension T is considerably small. Therefore, the magnitude of the component in the direction opposite to the centrifugal force F of the tension T does not differ greatly from the magnitude of the tension T itself. Therefore, as compared with the sheet 106 in the case of the rotor 101 of the comparative example, the holder 14 of the rotor 1 of the present embodiment can effectively utilize the tension T to counter the centrifugal force F.

また、保持具１４はシート状であるため、ワイヤ５１等を使用してロータコア３の溝部１３内に入れ易くすることができる。
さらに、単一の磁極４に対して複数個、前記の例で６個の磁石１１が磁石保持部１２によりロータコア３の周面３ａに保持される。そのため、個々の磁石１１におけるロータコア３の周方向の幅は短い。よって、前記の角度θを小さくすることができるので、この点でも、張力Ｔを効果的に活用して遠心力Ｆに対抗することができる。
また、単一の磁極４に対して複数個の磁石１１に分割され、保持具１４で仕切られているため、各磁石１１におけるロータコア３の周方向の断面積は狭い。よって、磁石１１に発生する渦電流を低減し、磁石１１の発熱を抑制することができる。 Further, since the holder 14 has a sheet shape, it can be easily inserted into the groove portion 13 of the rotor core 3 by using a wire 51 or the like.
Further, a plurality of magnets 11 for a single magnetic pole 4, six magnets 11 in the above example, are held on the peripheral surface 3a of the rotor core 3 by the magnet holding portion 12. Therefore, the width of the rotor core 3 in each magnet 11 in the circumferential direction is short. Therefore, since the angle θ can be reduced, the tension T can be effectively utilized to counter the centrifugal force F also in this respect.
Further, since the single magnetic pole 4 is divided into a plurality of magnets 11 and partitioned by the holder 14, the cross-sectional area of the rotor core 3 in each magnet 11 in the circumferential direction is narrow. Therefore, it is possible to reduce the eddy current generated in the magnet 11 and suppress the heat generation of the magnet 11.

さらに、各磁極４において、止着部１５は、ロータコア３の周方向に千鳥状に配列されている。すなわち、止着部１５が位置するロータコア３の深さは交互に浅くなったり深くなったりしている。そのため、止着部１５のロータコア３内での深さが一律である場合、同じ深さに数多くの円筒１５ａが形成されることになる。これと比較して、本実施形態のロータ１はロータコア３の機械的強度を高めることができる。
その上、止着部１５は、各溝部１３に設けられ、溝部１３の幅より直径の長い円筒１５ａ内に収納されてその内部で拡径できる拡径部材１５ｂで保持具１４を止着している。よって、磁石収納凹部３ｂ内での磁石１１の保持作業を容易に行うことができる。 Further, at each magnetic pole 4, the fastening portions 15 are arranged in a staggered manner in the circumferential direction of the rotor core 3. That is, the depth of the rotor core 3 in which the fastening portion 15 is located is alternately shallowed or deepened. Therefore, if the depth of the fastening portion 15 in the rotor core 3 is uniform, a large number of cylinders 15a will be formed at the same depth. In comparison with this, the rotor 1 of the present embodiment can increase the mechanical strength of the rotor core 3.
Further, the fastening portion 15 is provided in each groove portion 13, and the holder 14 is fastened by a diameter-expanding member 15b that is housed in a cylinder 15a having a diameter longer than the width of the groove portion 13 and can be expanded in diameter. There is. Therefore, the magnet 11 can be easily held in the magnet storage recess 3b.

なお、本発明は、以上説明した本実施形態に限定されるものでないことは言うまでもない。例えば、前記の例では、各磁極４は磁石１１を６個使用しているが、５個以下でもよいし、７個以上でもよい。
さらに、前記実施形態はインナーロータ型のロータ１に本発明を適用しているが、アウターロータ型のロータの各磁極に前記のような構成の磁極４を用いるようにしてもよい。 Needless to say, the present invention is not limited to the present embodiment described above. For example, in the above example, each magnetic pole 4 uses 6 magnets 11, but may be 5 or less, or 7 or more.
Further, although the present invention is applied to the inner rotor type rotor 1 in the above embodiment, the magnetic poles 4 having the above configuration may be used for each magnetic pole of the outer rotor type rotor.

１ ロータ
３ ロータコア
４ 磁極
３ａ 周面
１１ 磁石
１２ 磁石保持部
１３ 溝部
１４ 保持具
１４ａ 両端
１５ 止着部
１５ａ 孔（円筒）
１５ｂ 拡径部材
１３１ 止着溝部
１３２ 隣接溝部 1 Rotor 3 Rotor core 4 Magnetic pole 3a Peripheral surface 11 Magnet 12 Magnet holding part 13 Groove part 14 Holding tool 14a Both ends 15 Fastening part 15a Hole (cylinder)
15b Diameter expansion member 131 Fastening groove part 132 Adjacent groove part

Claims (7)

ＳＰＭ式回転電機のロータであって、
ロータコアと、
前記ロータコアの周面に設けられる磁石と、
前記磁石を前記周面に保持させる磁石保持部とを備え、
前記磁石保持部は、
前記ロータコアの周面から半径方向内部にかけて形成された複数の溝部と、
前記磁石を前記周面上で覆って当該磁石を当該周面上に保持し、当該覆う部分の両端側がそれぞれ異なる前記溝部内に入り込んでいる保持具と、
前記各溝部の前記ロータコアの奥側に設けられ前記保持具が当該溝部から抜け出すのを防止するように当該保持具を止着する止着部と、を備え、
前記止着部は、前記ロータコアの周方向に千鳥状に複数個配置されている
ことを特徴とするロータ。 It is a rotor of SPM type rotary electric machine,
With the rotor core
A magnet provided on the peripheral surface of the rotor core and
A magnet holding portion for holding the magnet on the peripheral surface is provided.
The magnet holding portion is
A plurality of grooves formed from the peripheral surface of the rotor core to the inside in the radial direction, and
A holder that covers the magnet on the peripheral surface to hold the magnet on the peripheral surface, and both ends of the covering portion are inserted into the different grooves.
A fastening portion provided on the inner side of the rotor core of each groove portion and for fastening the holder so as to prevent the holder from coming out of the groove portion is provided.
A plurality of the fastening portions are arranged in a staggered manner in the circumferential direction of the rotor core.
A rotor characterized by that. 前記保持具は、シート状の部材であることを特徴とする請求項１に記載のロータ。 The rotor according to claim 1, wherein the holder is a sheet-shaped member. 単一の磁極に対して複数個の前記磁石が前記磁石保持部により前記周面に保持されることを特徴とする請求項１又は請求項２に記載のロータ。 The rotor according to claim 1 or 2, wherein a plurality of the magnets are held on the peripheral surface by the magnet holding portion with respect to a single magnetic pole. 前記止着部は、前記各溝部に設けられ当該溝部の幅より直径の長い孔内に収納されて前記孔内で拡径できる拡径部材で前記保持具を止着することを特徴とする請求項１乃至請求項３の何れかの一項に記載のロータ。 The claim is characterized in that the fastening portion is provided in each groove portion and is housed in a hole having a diameter longer than the width of the groove portion, and the holder is fastened by a diameter-expanding member capable of expanding the diameter in the hole. The rotor according to any one of items 1 to 3 . 請求項１乃至請求項４の何れかの一項に記載のロータを備えることを特徴とする回転電機。 A rotary electric machine comprising the rotor according to any one of claims 1 to 4 . 周面から半径方向内部にかけて複数の溝部が形成されたロータコアの一つの前記溝部に保持具を２枚折りして収納する第１収納工程と、
前記保持具を収納した溝部の奥側に設けられ前記ロータコアの周方向に千鳥状に複数個配置した止着部で当該保持具を止着する第１止着工程と、
前記保持具を止着した溝部である止着溝部と当該止着溝部に隣接する前記溝部である隣接溝部の２つの溝部間に位置する前記周面上に磁極を構成するための磁石を配置する配置工程と、
前記隣接溝部に前記止着溝部から飛び出している前記保持具の２枚折りの一枚を再度２枚折りして収納する第２収納工程と、
前記保持具で前記磁石を前記周面に押さえつけた状態で、前記隣接溝部の奥側に設けられた止着部で当該保持具を止着する第２止着工程とを備えることを特徴とするロータの磁石取付方法。 The first storage step of folding and storing the holder in two in the groove of one of the rotor cores in which a plurality of grooves are formed from the peripheral surface to the inside in the radial direction.
A first fastening step in which the holder is fastened by a plurality of fasteners provided in the back side of the groove in which the holder is housed and arranged in a staggered manner in the circumferential direction of the rotor core .
A magnet for forming a magnetic pole is arranged on the peripheral surface located between the two grooves of the anchored groove portion which is the groove portion to which the holder is fastened and the adjacent groove portion which is the groove portion adjacent to the anchored groove portion. Placement process and
A second storage step of folding and storing one of the double-folded holders protruding from the fastening groove in the adjacent groove again.
It is characterized by comprising a second fastening step of fastening the holder with a fastening portion provided on the inner side of the adjacent groove portion in a state where the magnet is pressed against the peripheral surface by the holder. How to mount the rotor magnet. 前記第１収納工程、前記第１止着工程、前記配置工程、前記第２収納工程及び前記第２止着工程を繰り返すことにより、前記周面に前記磁石を連続的に複数個保持させて、当該複数個の磁石で単一の磁極を形成する請求項６に記載のロータの磁石取付方法。 By repeating the first storage step, the first fastening step, the placement step, the second storage step, and the second fastening step, a plurality of the magnets are continuously held on the peripheral surface. The magnet mounting method for a rotor according to claim 6 , wherein a single magnetic pole is formed by the plurality of magnets.
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