JP2006304453A - Permanent magnet motor - Google Patents

Permanent magnet motor Download PDF

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JP2006304453A
JP2006304453A JP2005120874A JP2005120874A JP2006304453A JP 2006304453 A JP2006304453 A JP 2006304453A JP 2005120874 A JP2005120874 A JP 2005120874A JP 2005120874 A JP2005120874 A JP 2005120874A JP 2006304453 A JP2006304453 A JP 2006304453A
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permanent magnet
magnetic
rotor
magnet pieces
magnetic pole
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Toshinori Tanaka
敏則 田中
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To increase an output of a permanent magnet motor 1 by increasing effective magnetic flux by reducing the leakage of magnetic flux generated by permanent magnets 14 that constitute rotor magnetic poles 13. <P>SOLUTION: The permanent magnet motor 1 rotates in synchronization with a rotation magnetic field generated by a stator 3 with the permanent magnets 14 as the rotor magnetic poles 13. The rotor magnetic poles 13 are aligned with a plurality of pieces of the permanent magnets 14 oriented toward a rotating shaft 10, and the permanent magnet pieces 14 are magnetized by inclining directions of magnetic lines of force 15 generated by the permanent magnet pieces 14 located at both ends in the direction of the rotating shaft 10 toward center sides of the rotor magnetic poles 13. By this, the leakage magnetic flux of the rotor magnetic pole 13 is reduced and the effective magnetic flux is increased, thus increasing the output of the permanent magnet motor 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、永久磁石が取り付けられた回転子が、固定子によって作られる回転磁界に同期して回動する永久磁石モータに係るものである。   The present invention relates to a permanent magnet motor in which a rotor to which a permanent magnet is attached rotates in synchronization with a rotating magnetic field created by a stator.

固定子巻線の回転磁界により回転子が回動する永久磁石モータにおいては、固定子巻線は、インバータ等を介して供給される電源によって付勢される。このため、電源には高調波が含まれており、回転子の永久磁石に渦電流が発生する。
そこで、従来の永久磁石モータは、永久磁石片を回転軸方向へ積層し、磁性材のバックヨーク材に積層断面を露出させて固着させていた（例えば、特許文献１参照）。
また、各回転子磁極を軸方向に複数配列して、所定の形状を得やすくしたり、大型化を可能にしていた（例えば、特許文献２参照）。
更にまた、磁極が周方向に配列された複数の永久磁石片で構成して、大きな磁極を構成するようにしていた（例えば、特許文献２参照）。 In a permanent magnet motor in which the rotor is rotated by the rotating magnetic field of the stator winding, the stator winding is energized by a power source supplied via an inverter or the like. For this reason, the power supply includes harmonics, and eddy currents are generated in the permanent magnet of the rotor.
Therefore, in the conventional permanent magnet motor, the permanent magnet pieces are laminated in the direction of the rotation axis, and the laminated cross section is exposed and fixed to the magnetic back yoke material (see, for example, Patent Document 1).
In addition, a plurality of rotor magnetic poles are arranged in the axial direction so that a predetermined shape can be easily obtained or the size can be increased (for example, see Patent Document 2).
Furthermore, a large magnetic pole is configured by a plurality of permanent magnet pieces in which the magnetic poles are arranged in the circumferential direction (see, for example, Patent Document 2).

特開平１１−２２０８４７号公報JP-A-11-220847 特開平６−７０５２０号公報JP-A-6-70520

従来の永久磁石モータは、上記のとおり、永久磁石片を回転軸方向へ積層して渦電流の発生を阻止するようにしたものであり、永久磁石の発生する磁束を有効に利用することを目的としたものではなかった。
また、回転子磁極を構成する永久磁石片を軸方向又は周方向に配列したものも、所定の形状を得易くしたり、大型化に対応するようにしたものであって、永久磁石の発生する磁束を有効に利用することを目的としたものではなかった。 As described above, the conventional permanent magnet motor is formed by laminating permanent magnet pieces in the direction of the rotation axis to prevent the generation of eddy current, and aims to effectively use the magnetic flux generated by the permanent magnet. It was not.
Also, the permanent magnet pieces constituting the rotor magnetic poles arranged in the axial direction or the circumferential direction can be easily obtained in a predetermined shape or can be increased in size, and permanent magnets are generated. It was not intended to make effective use of magnetic flux.

この発明は、上記課題を解決するためになされたものであり、永久磁石の発生する磁束の漏れを減少させて有効磁束を増やすことにより、永久磁石モータの出力を増大させることを目的とする。   The present invention has been made to solve the above-described problem, and an object thereof is to increase the output of a permanent magnet motor by reducing the leakage of magnetic flux generated by a permanent magnet and increasing the effective magnetic flux.

この発明に係る永久磁石モータは、永久磁石を回転子磁極とし、固定子の作る回転磁界に同期して回動するものであって、上記回転子磁極の各磁極を、複数の永久磁石片を回転軸方向へ向けて配列して構成すると共に、軸方向の両端に位置する永久磁石片の発生する磁力線の方向を、それぞれ磁極の中心側へ傾斜するように永久磁石片を磁化したものである。   A permanent magnet motor according to the present invention uses a permanent magnet as a rotor magnetic pole and rotates in synchronization with a rotating magnetic field formed by a stator, and each magnetic pole of the rotor magnetic pole is divided into a plurality of permanent magnet pieces. The permanent magnet pieces are magnetized so that the direction of the lines of magnetic force generated by the permanent magnet pieces located at both ends in the axial direction is inclined toward the center side of the magnetic poles. .

この発明に係る永久磁石モータは、上記のとおり、回転子磁極の各磁極を、複数の永久磁石片を回転軸方向へ向けて配列して構成すると共に、軸方向の両端に位置する永久磁石片の発生する磁力線の方向を、それぞれ磁極の中心側へ傾斜するように永久磁石片を磁化したので、回転子磁極の漏れ磁束を減少させることができる。このため、有効磁束が増加して永久磁石モータの出力を増大させることができる、という効果を奏する。   In the permanent magnet motor according to the present invention, as described above, each magnetic pole of the rotor magnetic pole is configured by arranging a plurality of permanent magnet pieces in the direction of the rotation axis, and the permanent magnet pieces located at both ends in the axial direction. Since the permanent magnet pieces are magnetized such that the direction of the lines of magnetic force generated are inclined toward the center side of the magnetic poles, the leakage magnetic flux of the rotor magnetic poles can be reduced. For this reason, there exists an effect that the effective magnetic flux increases and the output of a permanent magnet motor can be increased.

以下、図面を参照して、この発明の実施の形態について説明する。なお、各図中、同一又は相当する部分には同一符号を付し、説明の重複を省いた。
実施の形態１．
図１から図３は、この発明の実施の形態１を示す。図１は、回転軸に直交する断面図、図２は、図１のＩＩ−ＩＩ線断面を矢視した断面図である。
永久磁石モータ１の固定子３は、固定子ヨーク２に取り付けられており、固定子鉄心４と、この固定子鉄心４に巻き掛けられた固定巻線５からなっている。回転子１１は、回転子ヨーク１２と、この回転子ヨーク１２に取り付けられた回転子磁極１３からなっている。回転子磁極１３は永久磁石で構成されており、固定子３の作る回転磁界に同期して回動して回転軸１０を駆動する。 Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, and duplication of description was omitted.
Embodiment 1 FIG.
1 to 3 show Embodiment 1 of the present invention. 1 is a cross-sectional view orthogonal to the rotation axis, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
A stator 3 of the permanent magnet motor 1 is attached to a stator yoke 2 and includes a stator core 4 and a fixed winding 5 wound around the stator core 4. The rotor 11 includes a rotor yoke 12 and a rotor magnetic pole 13 attached to the rotor yoke 12. The rotor magnetic pole 13 is composed of a permanent magnet and rotates in synchronization with the rotating magnetic field formed by the stator 3 to drive the rotating shaft 10.

回転子磁極１３の各磁極は、二等分に分割された永久磁石片１４−１及び１４−２が同じ極を径方向へ向けて、即ち、回転子磁極１３がＮ極の場合は、Ｎ極を固定子３側へ向けて回転軸１０の延設方向に配列されて回転子ヨーク１２に取り付けられている。
ここで、永久磁石片１４−１は、図２に示したとおり、回転子磁極１３の中心側へ傾斜角αだけ傾斜した方向へ磁力線１５−１を発生するように磁化されている。
同様に、永久磁石片１４−２も、回転子磁極１３の中心側へ傾斜角αだけ傾斜した方向へ磁力線１５−２を発生している。
つまり、各永久磁石片１４−１、１４−２の発生する磁力線の方向は、互に対向して回転子磁極１３の中心側へ傾斜している。
図３は、磁力線１５の傾斜角αと有効磁束Φの関係を、特性曲線Φ２によって示す。傾斜角αを、α＝０から増大することによって漏れ磁束が減少する。このため、有効磁束Φは徐々に増加し、傾斜角α＝α１のときに最大になる。更に傾斜角αを増大させると、磁気抵抗の増大により有効磁束Φは徐々に減少する。
なお、図３には、永久磁石片を三分割した場合の有効磁束Φと傾斜角αの関係も特性曲線Φ３によって同時に図示した。三分割については、実施の形態２で述べる。 Each of the magnetic poles of the rotor magnetic pole 13 is divided into two equal parts when the permanent magnet pieces 14-1 and 14-2 are directed in the radial direction, that is, when the rotor magnetic pole 13 is an N pole, The poles are arranged in the extending direction of the rotating shaft 10 with the poles facing the stator 3 and are attached to the rotor yoke 12.
Here, as shown in FIG. 2, the permanent magnet piece 14-1 is magnetized so as to generate a magnetic force line 15-1 in a direction inclined by an inclination angle α toward the center side of the rotor magnetic pole 13.
Similarly, the permanent magnet piece 14-2 also generates a magnetic force line 15-2 in a direction inclined by an inclination angle α toward the center side of the rotor magnetic pole 13.
That is, the directions of the lines of magnetic force generated by the permanent magnet pieces 14-1 and 14-2 are inclined toward the center of the rotor magnetic pole 13 so as to face each other.
FIG. 3 shows a relationship between the inclination angle α of the magnetic field lines 15 and the effective magnetic flux Φ by a characteristic curve Φ2. Increasing the tilt angle α from α = 0 reduces the leakage flux. For this reason, the effective magnetic flux Φ gradually increases and becomes maximum when the inclination angle α = α1. When the inclination angle α is further increased, the effective magnetic flux Φ gradually decreases due to the increase in magnetic resistance.
In FIG. 3, the relationship between the effective magnetic flux Φ and the inclination angle α when the permanent magnet piece is divided into three parts is also shown by the characteristic curve Φ3. The three division will be described in the second embodiment.

上記実施の形態１によれば、各永久磁石片１４−１、１４−２の発生する磁力線１５−１、１５−２の方向を、回転子磁極１３の中心側へ傾斜させたので、各永久磁石片１４−１、１４−２の両端部における漏れ磁束が減少して有効磁束Φを増加させることができる。この有効磁束Φの増加によって永久磁石モータ１の出力を増大させることができる。   According to the first embodiment, the directions of the magnetic lines 15-1 and 15-2 generated by the permanent magnet pieces 14-1 and 14-2 are inclined toward the center side of the rotor magnetic pole 13, so Leakage magnetic flux at both ends of the magnet pieces 14-1 and 14-2 can be reduced and the effective magnetic flux Φ can be increased. By increasing the effective magnetic flux Φ, the output of the permanent magnet motor 1 can be increased.

実施の形態２．
図４及び図５は、この発明の実施の形態２を示す。図４は、図１のＩＩ−ＩＩ線断面相当部位を矢視した断面図である。
この実施の形態２は、回転子２０が、回転子ヨーク１２と、この回転子ヨーク１２に取り付けられた回転子磁極２１からなっている。回転子磁極２１の各磁極を、三分割された永久磁石片２２−１、２２−２及び２２−３で構成したものである。そして、各永久磁石片２２−１、２２−２及び２２−３は、同じ極を径方向へ向けて、即ち、回転子磁極２１がＮ極の場合は、Ｎ極を固定子３側へ向けて回転軸１０の延設方向に配列され、回転子ヨーク１２に取り付けられている。しかも、両端の永久磁石片２２−１、２２−３の軸方向の寸法は、いずれもｄ１であり、内側の永久磁石片２２−２の軸方向の寸法はｄ２であって、寸法ｄ２は寸法ｄ１よりも長くなっている。
ここで、両端の永久磁石片２２−１、２２−３は、実施の形態１と同様に、回転子磁極１３の中心側へ傾斜角αだけ傾斜した方向へ磁力線２３−１、２３−３を発生するように磁化されている。内側の永久磁石片２２−２は、回転子磁極２１の外周面から垂直に磁力線２３−２を発生するように磁化されている。 Embodiment 2. FIG.
4 and 5 show a second embodiment of the present invention. 4 is a cross-sectional view taken along the line II-II in FIG.
In the second embodiment, the rotor 20 includes a rotor yoke 12 and a rotor magnetic pole 21 attached to the rotor yoke 12. Each of the magnetic poles of the rotor magnetic pole 21 is constituted by three divided permanent magnet pieces 22-1, 22-2 and 22-3. And each permanent magnet piece 22-1, 22-2, and 22-3 orient | assign the same pole to radial direction, ie, when the rotor magnetic pole 21 is N pole, orient | assign N pole to the stator 3 side. Are arranged in the extending direction of the rotary shaft 10 and attached to the rotor yoke 12. Moreover, the axial dimensions of the permanent magnet pieces 22-1 and 22-3 at both ends are both d1, the axial dimension of the inner permanent magnet pieces 22-2 is d2, and the dimension d2 is a dimension. It is longer than d1.
Here, as in the first embodiment, the permanent magnet pieces 22-1 and 22-3 at both ends have magnetic lines of force 23-1 and 23-3 inclined in the direction inclined by the inclination angle α toward the center side of the rotor magnetic pole 13. Magnetized to occur. The inner permanent magnet piece 22-2 is magnetized so as to generate lines of magnetic force 23-2 perpendicularly from the outer peripheral surface of the rotor magnetic pole 21.

図５は、磁力線２３の傾斜角αと有効磁束Φの関係を、特性曲線Φ３１、Φ３２、Φ３３によって示す。傾斜角αを、α＝０から増大することによって漏れ磁束が減少して有効磁束Φは徐々に増加する。
ここで、内側の永久磁石片２２−２の寸法ｄ２を、両端の永久磁石片２２−１、２２−３の寸法ｄ１よりも長くした場合の有効磁束Φは、特性曲線Φ３１で示したように、傾斜角αによって最も顕著に増加する。これは、漏れ磁束は両端部分で発生するものとして、その減少を図るようにしたものである。従って、漏れ磁束に関係しない内側の永久磁石片２２−２は、垂直に磁力線２３−２を発生するようにして空隙部分の磁気抵抗の増加を避け、有効磁束Φに寄与するようにした。このため、有効磁束Φが最も顕著に増加する。 FIG. 5 shows the relationship between the inclination angle α of the magnetic lines of force 23 and the effective magnetic flux Φ by characteristic curves Φ31, Φ32, and Φ33. Increasing the tilt angle α from α = 0 reduces the leakage flux and gradually increases the effective flux Φ.
Here, the effective magnetic flux Φ when the dimension d2 of the inner permanent magnet piece 22-2 is longer than the dimension d1 of the permanent magnet pieces 22-1 and 22-3 at both ends is as shown by the characteristic curve Φ31. It increases most notably with the inclination angle α. In this case, leakage flux is assumed to be generated at both ends, and is reduced. Therefore, the inner permanent magnet piece 22-2 not related to the leakage magnetic flux generates a magnetic force line 23-2 vertically so as to avoid an increase in the magnetic resistance of the gap portion and contribute to the effective magnetic flux Φ. For this reason, the effective magnetic flux Φ increases most significantly.

永久磁石片２２−１、２２−２、２２−３が三等分された場合の有効磁束Φは、特性曲線Φ３２で示したように、漏れ磁束の減少によって有効磁束Φは増大するものの、磁力線２３−１、２３−３の傾斜による磁気抵抗の増大によって、有効磁束Φの増分は、特性曲線Φ３１よりも少ない。
両端の永久磁石片２２−１、２２−３の寸法ｄ１を、内側の永久磁石片２２−２の寸法ｄ２よりも長くした場合の有効磁束Φは、特性曲線Φ３３で示したように、両端の永久磁石片２２−１、２２−３による影響が更に増大して有効磁束Φの増分は、特性曲線Φ３２よりも更に少なくなる。 As shown by the characteristic curve Φ32, the effective magnetic flux Φ when the permanent magnet pieces 22-1, 22-2, and 22-3 are divided into three equal parts increases the effective magnetic flux Φ due to the decrease of the leakage magnetic flux, but the magnetic field lines The increase of the effective magnetic flux Φ is smaller than that of the characteristic curve Φ31 due to the increase of the magnetic resistance due to the inclinations of 23-1, 23-3.
The effective magnetic flux Φ when the dimension d1 of the permanent magnet pieces 22-1 and 22-3 at both ends is made longer than the dimension d2 of the inner permanent magnet piece 22-2 is as shown by the characteristic curve Φ33. The effect of the permanent magnet pieces 22-1 and 22-3 is further increased, and the increment of the effective magnetic flux Φ is further smaller than the characteristic curve Φ32.

上記実施の形態２によれば、両端の永久磁石片２２−１、２２−３の発生する磁力線２３−１、２３−３の方向を、回転子磁極１３の中心側へ傾斜させたので、両端部における漏れ磁束が減少して有効磁束Φを増加させることができる。この有効磁束Φの増加によって永久磁石モータ１の出力を増大させることができる。
特に、漏れ磁束に関係しない内側の永久磁石片２２−２は、磁力線２３−２を垂直に発生させて空隙部分の磁気抵抗の増加を避けると共に、寸法ｄ２を寸法ｄ１よりも長くして有効磁束Φに寄与させるようにした。このため、両端の永久磁石片２２−１、２２−３の傾斜と相俟って、有効磁束Φを増大させることができる。
即ち、永久磁石片２２−１、２２−２、２２−３が取り付けられる部位に応じて、磁化の特性を変化させたので、有効磁束Φが増加し、永久磁石モータ１の出力を増大させることができる。 According to the second embodiment, the directions of the magnetic lines of force 23-1, 23-3 generated by the permanent magnet pieces 22-1, 22-3 at both ends are inclined toward the center side of the rotor magnetic pole 13, so As a result, the leakage magnetic flux in the portion is reduced and the effective magnetic flux Φ can be increased. By increasing the effective magnetic flux Φ, the output of the permanent magnet motor 1 can be increased.
In particular, the inner permanent magnet piece 22-2 that is not related to the leakage magnetic flux generates the magnetic force line 23-2 vertically to avoid an increase in the magnetic resistance of the air gap portion, and also makes the dimension d2 longer than the dimension d1 to increase the effective magnetic flux. It was made to contribute to Φ. For this reason, the effective magnetic flux Φ can be increased in combination with the inclination of the permanent magnet pieces 22-1 and 22-3 at both ends.
That is, since the magnetization characteristics are changed according to the part where the permanent magnet pieces 22-1, 22-2, and 22-3 are attached, the effective magnetic flux Φ is increased and the output of the permanent magnet motor 1 is increased. Can do.

実施の形態３．
図６は、この発明の実施の形態３を示す。図６は、図１のＩＩ−ＩＩ線断面相当部位を矢視した断面図である。
この実施の形態３は、回転子２４が、回転子ヨーク１２と、この回転子ヨーク１２に取り付けられた回転子磁極２５からなっている。回転子磁極２５の各磁極を、四分割された永久磁石片２６−１、２６−２、２６−３及び２６−４で構成したものである。そして、各永久磁石片２６−１、２６−２、２６−３及び２６−４は、同じ極を径方向へ向けて、即ち、回転子磁極２５がＮ極の場合は、Ｎ極を固定子３側へ向けて回転軸１０の延設方向に配列され、回転子ヨーク１２に取り付けられている。しかも、両端の永久磁石片２６−１、２６−４の回転軸１０方向の寸法は、いずれもｄ３であり、内側の永久磁石片２６−２、２６−３の回転軸１０方向の寸法は、いずれもｄ４であって、寸法ｄ４は寸法ｄ３よりも長くなっている。 Embodiment 3 FIG.
FIG. 6 shows a third embodiment of the present invention. 6 is a cross-sectional view taken along the line II-II in FIG.
In the third embodiment, the rotor 24 includes a rotor yoke 12 and a rotor magnetic pole 25 attached to the rotor yoke 12. Each magnetic pole of the rotor magnetic pole 25 is composed of permanent magnet pieces 26-1, 26-2, 26-3 and 26-4 divided into four. Each permanent magnet piece 26-1, 26-2, 26-3 and 26-4 has the same pole in the radial direction, that is, when the rotor magnetic pole 25 is N pole, the N pole is the stator. The rotating shaft 10 is arranged in the extending direction toward the side 3 and attached to the rotor yoke 12. Moreover, the dimensions of the permanent magnet pieces 26-1 and 26-4 at both ends in the direction of the rotational axis 10 are both d3, and the dimensions of the inner permanent magnet pieces 26-2 and 26-3 in the direction of the rotational axis 10 are Both are d4, and the dimension d4 is longer than the dimension d3.

ここで、内側の永久磁石片２６−２、２６−３の磁力線２７−２、２７−３は、傾斜角βでそれぞれ回転子磁極２５の中心側へ傾斜している。また、両端の永久磁石片２６−１、２６−４の磁力線２７−１、２７−４は、内側の磁力線２７−２、２７−３の傾斜角βよりも大きい傾斜角αで回転子磁極２５の中心側へ傾斜している。   Here, the magnetic lines 27-2 and 27-3 of the inner permanent magnet pieces 26-2 and 26-3 are inclined toward the center of the rotor magnetic pole 25 at an inclination angle β. Further, the magnetic lines 27-1 and 27-4 of the permanent magnet pieces 26-1 and 26-4 at both ends have an inclination angle α larger than the inclination angle β of the inner magnetic lines 27-2 and 27-3 and the rotor magnetic pole 25. Inclined toward the center of

上記実施の形態３によっても、両端の永久磁石片２６−１、２６−４の発生する磁力線２７−１、２７−４の方向を、回転子磁極２５の中心側へ傾斜させたので、両端部における漏れ磁束が減少して有効磁束Φを増加させることができる。この有効磁束Φの増加によって永久磁石モータ１の出力を増大させることができる。
また、内側の永久磁石片２６−２、２６−３の回転軸１０方向の寸法ｄ４は、両端の永久磁石片２６−１、２６−４の回転軸１０方向の寸法ｄ３よりも長い。しかも、磁力線２７−２、２７−３の傾斜角βは、両端の磁力線２７−１、２７−４の傾斜角αよりも小さくて垂直に近いので、永久磁石片２６−２、２６−３は、有効磁束Φの増加に寄与する。
更に、四分割にしたので、渦電流損の低減も図ることができる。 Also in the third embodiment, the directions of the magnetic lines 27-1 and 27-4 generated by the permanent magnet pieces 26-1 and 26-4 at both ends are inclined toward the center side of the rotor magnetic pole 25. As a result, the effective magnetic flux Φ can be increased. By increasing the effective magnetic flux Φ, the output of the permanent magnet motor 1 can be increased.
The dimension d4 of the inner permanent magnet pieces 26-2 and 26-3 in the direction of the rotation axis 10 is longer than the dimension d3 of the permanent magnet pieces 26-1 and 26-4 at both ends in the direction of the rotation axis 10. Moreover, since the inclination angle β of the magnetic lines 27-2 and 27-3 is smaller than the inclination angle α of the magnetic lines 27-1 and 27-4 at both ends and is almost perpendicular, the permanent magnet pieces 26-2 and 26-3 are This contributes to an increase in the effective magnetic flux Φ.
Furthermore, since it is divided into four parts, eddy current loss can be reduced.

この発明の実施の形態１における永久磁石モータの回転軸に直交する断面図。Sectional drawing orthogonal to the rotating shaft of the permanent magnet motor in Embodiment 1 of this invention. この発明の実施の形態１における永久磁石モータの図１のＩＩ−ＩＩ線断面を矢視した断面図。Sectional drawing which looked at the II-II line | wire cross section of FIG. 1 of the permanent magnet motor in Embodiment 1 of this invention. この発明の実施の形態１における磁力線１５の傾斜角αと有効磁束Φの関係を示す図。The figure which shows the relationship between the inclination | tilt angle (alpha) of the magnetic force line 15 and effective magnetic flux (PHI) in Embodiment 1 of this invention. この発明の実施の形態２における永久磁石モータの図１のＩＩ−ＩＩ線断面を矢視した断面図。Sectional drawing which looked at the II-II line | wire cross section of FIG. 1 of the permanent magnet motor in Embodiment 2 of this invention. この発明の実施の形態２における磁力線２３の傾斜角αと有効磁束Φの関係を示す。The relationship between the inclination | tilt angle (alpha) of the magnetic force line 23 and effective magnetic flux (PHI) in Embodiment 2 of this invention is shown. この発明の実施の形態２における永久磁石モータの図１のＩＩ−ＩＩ線断面を矢視した断面図。Sectional drawing which looked at the II-II line | wire cross section of FIG. 1 of the permanent magnet motor in Embodiment 2 of this invention.

符号の説明Explanation of symbols

１ 永久磁石モータ、 ２ 固定ヨーク、 ３ 固定子、 ４ 固定子鉄心、 ５ 固定子巻線、 １０ 回転軸、 １１ 回転子、 １２ 回転子ヨーク、 １３ 回転子磁極、 １４ 永久磁石片、 １５ 磁力線、 ２０ 回転子、 ２１ 回転子磁極、 ２２ 永久磁石片、 ２３ 磁力線、 ２４ 回転子、 ２５ 回転子磁極、 ２６ 永久磁石片、 ２７ 磁力線。   DESCRIPTION OF SYMBOLS 1 Permanent magnet motor, 2 Fixed yoke, 3 Stator, 4 Stator iron core, 5 Stator winding, 10 Rotating shaft, 11 Rotor, 12 Rotor yoke, 13 Rotor magnetic pole, 14 Permanent magnet piece, 15 Magnetic field line, 20 Rotor, 21 Rotor magnetic pole, 22 Permanent magnet piece, 23 Magnetic field line, 24 Rotor, 25 Rotor magnetic pole, 26 Permanent magnet piece, 27 Magnetic field line.

Claims (5)

永久磁石を回転子磁極とし、固定子の作る回転磁界に同期して回動する永久磁石モータにおいて、複数の永久磁石片を回転軸方向へ向けて配列して上記回転子磁極の各磁極を構成し、かつ、両端の上記永久磁石片の発生する磁力線の方向が、それぞれ上記回転子磁極の中心側へ傾斜するように上記永久磁石片を磁化したことを特徴とする永久磁石モータ。   In a permanent magnet motor that uses a permanent magnet as a rotor magnetic pole and rotates in synchronization with a rotating magnetic field created by a stator, a plurality of permanent magnet pieces are arranged in the direction of the rotation axis to form each magnetic pole of the rotor magnetic pole. A permanent magnet motor, wherein the permanent magnet pieces are magnetized such that the directions of the lines of magnetic force generated by the permanent magnet pieces at both ends are inclined toward the center side of the rotor magnetic pole. 回転子磁極の各磁極を、二分割された永久磁石片が回転軸方向へ向けて配列されたものとし、かつ、上記永久磁石片の発生する磁力線の方向が、互に対向して上記磁極の中心側へ傾斜するように上記永久磁石片を磁化したことを特徴とする請求項１に記載の永久磁石モータ。   Each magnetic pole of the rotor magnetic pole is divided into two pieces of permanent magnet pieces facing the direction of the rotation axis, and the directions of the magnetic lines of force generated by the permanent magnet pieces are opposed to each other. The permanent magnet motor according to claim 1, wherein the permanent magnet piece is magnetized so as to be inclined toward the center. 回転子磁極の各磁極を、三分割された永久磁石片が回転軸方向へ向けて配列されたものとし、かつ、両端の上記永久磁石片の発生する磁力線の方向が、それぞれ上記磁極の中心側へ傾斜し、内側の上記永久磁石片の発生する磁力線の方向が、上記磁極の外周面に垂直となるように上記永久磁石片を磁化したことを特徴とする請求項１に記載の永久磁石モータ。   Each magnetic pole of the rotor magnetic pole has three divided permanent magnet pieces arranged in the direction of the rotation axis, and the direction of the lines of magnetic force generated by the permanent magnet pieces at both ends is the center side of the magnetic pole. 2. The permanent magnet motor according to claim 1, wherein the permanent magnet piece is magnetized so that a direction of a magnetic force line generated by the inner permanent magnet piece is perpendicular to an outer peripheral surface of the magnetic pole. . 回転子磁極の各磁極を、四分割された永久磁石片が回転軸方向へ向けて配列されたものとし、かつ、各永久磁石片の発生する磁力線の方向が、上記磁極の中心側へ傾斜すると共に、両端の上記永久磁石片の上記磁力線の傾斜角を、内側の上記永久磁石片の上記磁力線の傾斜角よりも大きくなるように上記永久磁石片を磁化した請求項１に記載の永久磁石モータ。   The magnetic poles of the rotor magnetic poles are formed by arranging permanent magnet pieces divided into four in the direction of the rotation axis, and the direction of the lines of magnetic force generated by the permanent magnet pieces is inclined toward the center side of the magnetic poles. The permanent magnet motor according to claim 1, wherein the permanent magnet piece is magnetized so that an inclination angle of the magnetic field lines of the permanent magnet pieces at both ends is larger than an inclination angle of the magnetic field lines of the inner permanent magnet piece. . 両端の永久磁石片の回転軸方向の寸法を、内側の永久磁石片の上記回転軸方向の寸法よりも短くしたことを特徴とする請求項３又は４に記載の永久磁石モータ。
5. The permanent magnet motor according to claim 3, wherein the dimension of the permanent magnet pieces at both ends in the rotation axis direction is shorter than the dimension of the inner permanent magnet pieces in the rotation axis direction.
JP2005120874A 2005-04-19 2005-04-19 Permanent magnet motor Pending JP2006304453A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009027842A (en) * 2007-07-19 2009-02-05 Toshiba Corp Permanent-magnet synchronous motor
JP2014121115A (en) * 2012-12-13 2014-06-30 Jtekt Corp Magnet embedded rotor and method of manufacturing magnet embedded rotor
CN108988532A (en) * 2018-08-10 2018-12-11 安徽鸿创新能源动力有限公司 A kind of rotor and whole glue injection method of entirety injecting glue

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JPH07212994A (en) * 1994-01-24 1995-08-11 Toshiba Corp Permanent-magnet motor
JP2000333429A (en) * 2000-01-01 2000-11-30 Matsushita Seiko Co Ltd Brushless electric motor and manufacturing method thereof
JP2002153033A (en) * 2000-11-15 2002-05-24 Mitsubishi Heavy Ind Ltd Ipm motor
JP2003318012A (en) * 2002-04-19 2003-11-07 Toda Kogyo Corp Permanent magnet for motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07212994A (en) * 1994-01-24 1995-08-11 Toshiba Corp Permanent-magnet motor
JP2000333429A (en) * 2000-01-01 2000-11-30 Matsushita Seiko Co Ltd Brushless electric motor and manufacturing method thereof
JP2002153033A (en) * 2000-11-15 2002-05-24 Mitsubishi Heavy Ind Ltd Ipm motor
JP2003318012A (en) * 2002-04-19 2003-11-07 Toda Kogyo Corp Permanent magnet for motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009027842A (en) * 2007-07-19 2009-02-05 Toshiba Corp Permanent-magnet synchronous motor
JP2014121115A (en) * 2012-12-13 2014-06-30 Jtekt Corp Magnet embedded rotor and method of manufacturing magnet embedded rotor
CN108988532A (en) * 2018-08-10 2018-12-11 安徽鸿创新能源动力有限公司 A kind of rotor and whole glue injection method of entirety injecting glue
CN108988532B (en) * 2018-08-10 2020-04-17 安徽鸿创新能源动力有限公司 Motor rotor with integral glue injection function and integral glue injection method

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