JP2003274590A - Rotor of permanent-magnet synchronous motor - Google Patents
Rotor of permanent-magnet synchronous motorInfo
- Publication number
- JP2003274590A JP2003274590A JP2002071265A JP2002071265A JP2003274590A JP 2003274590 A JP2003274590 A JP 2003274590A JP 2002071265 A JP2002071265 A JP 2002071265A JP 2002071265 A JP2002071265 A JP 2002071265A JP 2003274590 A JP2003274590 A JP 2003274590A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- permanent magnet
- steel sheet
- magnetic
- permanent magnets
- 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.)
- Withdrawn
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、効率改善を図った
各種永久磁石同期モータのロータに関するもので、詳し
くはモータのロータ本体には無方向性電磁鋼板を、磁力
線整流子には一方向性電磁鋼板を用いる技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rotors of various permanent magnet synchronous motors with improved efficiency. More specifically, the rotor body of the motor is made of non-oriented electrical steel sheet, and the magnetic field line commutator is made of unidirectional one. The present invention relates to a technology using electromagnetic steel sheets.
【0002】[0002]
【従来の技術】ロータ本体に永久磁石を埋め込んだ永久
磁石同期モータのロータは既に広く用いられている。例
えば、特開平10−112965号公報に記載のロータ
(A)がある。この公報に記載のロータは、高透磁率材
料のコアシートで外周円に対して逆方向に湾曲する凹溝
を多層に配設したものを周方向に複数等間隔で配設し、
凹溝の一部に永久磁石を埋め込んだものである。また、
電磁鋼板の積層体を永久磁石の周りを囲むように埋め込
んだ物として特開2000−201445号公報に記載
のロータ(B)がある。2. Description of the Related Art A rotor of a permanent magnet synchronous motor in which a permanent magnet is embedded in a rotor body is already widely used. For example, there is a rotor (A) described in JP-A-10-112965. The rotor described in this publication has a plurality of core sheets of a high-permeability material in which a plurality of concave grooves curved in the opposite direction to the outer circumference are arranged at equal intervals in the circumferential direction,
A permanent magnet is embedded in a part of the groove. Also,
There is a rotor (B) described in Japanese Patent Application Laid-Open No. 2000-201445 as a product in which a laminated body of electromagnetic steel plates is embedded so as to surround the permanent magnet.
【0003】[0003]
【発明が解決しようとする課題】上記のロータ(A)
は、上述の構成によりd軸インダクタンスLdとq軸イ
ンダクタンスLqの比、つまりLd/Lqが大きくとら
れており、大きなトルクを得ることができる。一方、多
くの湾曲した細い溝に永久磁石を埋め込むために、製造
に手間がかかりコストも高いという問題がある。またロ
ータ(B)においては、磁力線整流用に電磁鋼板をU字
型にして取り囲む対象である永久磁石を矩形型にし、よ
り簡易に製造できコストも低くなった。しかしながら、
さらなる高トルク化がモータの小型化に対し要請されて
いる。[Problems to be Solved by the Invention] The above rotor (A)
With the above configuration, the ratio of the d-axis inductance Ld and the q-axis inductance Lq, that is, Ld / Lq is large, and a large torque can be obtained. On the other hand, since permanent magnets are embedded in many curved thin grooves, there is a problem in that manufacturing is time-consuming and costly. Further, in the rotor (B), the electromagnetic steel plate is formed in a U shape for rectifying the magnetic force lines, and the surrounding permanent magnet is formed in a rectangular shape so that it can be manufactured more easily and the cost is reduced. However,
Higher torque is required for downsizing of motors.
【0004】本発明の目的は、上記問題に鑑み、ロータ
本体に永久磁石を埋め込むタイプの永久磁石同期モータ
のロータによるトルクをさらに高くして小型化を可能と
し、かつ効率を上げることが可能なロータを提供するこ
とにある。In view of the above problems, an object of the present invention is to further increase the torque by the rotor of a permanent magnet synchronous motor of the type in which a permanent magnet is embedded in the rotor body, thereby enabling miniaturization and increasing efficiency. To provide a rotor.
【0005】[0005]
【課題を解決するための手段】本発明の具体的な手段は
以下の通りである。
(1)無方向性電磁鋼板の打ち抜き片を積層してなるロ
ータ本体の外周近傍の内側へ、偶数個の板状の永久磁石
を円周方向に等間隔に、ロータ外側から見てN極、S極
を交互に配設し、各永久磁石のロータ中心側を通り、隣
接する各永久磁石との間隙部分を抜けてロータの外周部
に達する各永久磁石の周りのロータ内のq軸磁力線を収
束して整流する磁力線整流手段として一方向性電磁鋼板
を配設した永久磁石同期モータのロータにおいて、一方
向性電磁鋼板の透磁率をμ1、無方向性電磁鋼板の透磁
率をμ2とした時に、
20<μ1/μ2<40
を満足することを特徴とする永久磁石同期モータのロー
タ。
(2)磁力線整流手段として、ロータ外側に向かって湾
曲したU字状の一方向性電磁鋼板と湾曲内側に配置した
永久磁石をロータに埋め込んで成ることを特徴とする
(1)に記載の永久磁石同期モータのロータ。
(3)ロータ本体に埋め込まれた各永久磁石の外側部分
の無方向性電磁鋼板を永久磁石の長辺に沿って切り欠
き、ロータ外縁とステータとのギャップを大きくし、永
久磁石非配置部外縁とステータとのギャップを小さくし
た段付きギャップ構造を有することを特徴とする(1)
または(2)に記載の永久磁石同期モータのロータ。The concrete means of the present invention are as follows. (1) An even number of plate-shaped permanent magnets are arranged at equal intervals in the circumferential direction on the inner side of the outer periphery of the rotor body formed by stacking punched pieces of non-oriented electrical steel plates at the N pole as viewed from the outer side of the rotor, The S poles are alternately arranged, and the q-axis magnetic field lines in the rotor around the permanent magnets that pass through the rotor center side of each permanent magnet, pass through the gap between the adjacent permanent magnets, and reach the outer peripheral portion of the rotor. In a rotor of a permanent magnet synchronous motor in which a unidirectional magnetic steel sheet is arranged as a magnetic force rectifying means for converging and rectifying, when the magnetic permeability of the unidirectional magnetic steel sheet is μ1 and the magnetic permeability of the non-oriented magnetic steel sheet is μ2, , 20 <μ1 / μ2 <40. A rotor for a permanent magnet synchronous motor, characterized in that: (2) As the magnetic force line rectifying means, a U-shaped unidirectional electromagnetic steel plate curved toward the outer side of the rotor and a permanent magnet arranged on the inner side of the curved surface are embedded in the rotor. Magnet synchronous motor rotor. (3) The non-oriented electrical steel sheet of the outer portion of each permanent magnet embedded in the rotor body is cut out along the long side of the permanent magnet to increase the gap between the rotor outer edge and the stator, and the outer edge of the non-permanent magnet arrangement portion. Characterized by having a stepped gap structure with a small gap between the stator and the stator (1)
Alternatively, the rotor of the permanent magnet synchronous motor according to (2).
【0006】[0006]
【発明の実施の形態】すでに述べたように、現状のモー
タの効率向上、出力トルクの増大、形状の小型化等を図
るために永久磁石同期モータにおいては、永久磁石から
発生する磁束量、およびLq/Ld比をさらに大きくし
なければならない。ここでLqは磁束が流れ易いq軸方
向のインダクタンスで、Ldは永久磁石が配置されてい
るd軸方向のインダクタンスを示す。本発明者らはロー
タ部位の材料に注目し、Lq/Ld比を上げる手法を効
果的に実現するため鋭意研究を行った。BEST MODE FOR CARRYING OUT THE INVENTION As described above, in order to improve the efficiency of the current motor, increase the output torque, downsize the shape, etc., in the permanent magnet synchronous motor, the amount of magnetic flux generated from the permanent magnet, and The Lq / Ld ratio must be increased. Here, Lq is the inductance in the q-axis direction in which magnetic flux easily flows, and Ld is the inductance in the d-axis direction in which the permanent magnets are arranged. The present inventors paid attention to the material of the rotor portion and conducted earnest research to effectively realize a method of increasing the Lq / Ld ratio.
【0007】その結果ロータ本体内で磁束の流れる方向
を制御し、Lq/Ld比を大きくすることを考えたと
き、発明者らはロータ内の透磁率を局部的に変化させ、
透磁率の高い部分に磁束を導けばよいとの知見に至っ
た。実験を行ったところ、無方向性電磁鋼板中に一方向
性電磁鋼板を組み込んだ場合、一方向性電磁鋼板の磁化
容易方向(圧延方向)に磁束が集中した。したがって、
一方向性電磁鋼板の中でも透磁率の高いものを整流子と
して用い、まわりの無方向性電磁鋼板は透磁率の低いも
のを選定してロータを構成したところ、高トルクが得ら
れた。モータの突極比(Lq/Ld)はこのロータでは
8以上になり、大きなリラクタンストルクが得られたた
めと考えられる。As a result, when it is considered to control the direction of the magnetic flux flowing in the rotor body to increase the Lq / Ld ratio, the inventors locally change the magnetic permeability in the rotor,
We have come to the knowledge that it suffices to guide the magnetic flux to the part with high magnetic permeability. As a result of experiments, when the unidirectional electrical steel sheet was incorporated into the non-oriented electrical steel sheet, the magnetic flux was concentrated in the easy magnetization direction (rolling direction) of the unidirectional electrical steel sheet. Therefore,
Among the unidirectional electrical steel sheets, one having a high magnetic permeability was used as a commutator, and the surrounding non-oriented electrical steel sheet having a low magnetic permeability was selected to construct the rotor, and a high torque was obtained. It is considered that the salient pole ratio (Lq / Ld) of the motor was 8 or more in this rotor, and a large reluctance torque was obtained.
【0008】次に本発明の限定理由について述べる。ロ
ータ本体を無方向性電磁鋼板に、磁力線整流子を一方向
性電磁鋼板にした理由は、このような材料選択により、
磁束が透磁率の高い一方向性電磁鋼板を積層した磁力線
整流子に沿って流れ易くなり、トルクを高くすることが
出来るからである。また、ロータのq軸方向の一方向性
電磁鋼板の透磁率と無方向性電磁鋼板の透磁率の比を2
0超40未満としたのは20を超えるとモータの突極比
(Lq/Ld)が8以上になり、大きなリラクタンスト
ルクが得られるためである。一方、40以上ではコギン
グが発生するため40未満とした。Next, the reasons for limitation of the present invention will be described. The reason why the rotor body is a non-oriented electrical steel sheet and the magnetic field line commutator is a unidirectional electrical steel sheet is due to such material selection.
This is because it becomes easier for the magnetic flux to flow along the magnetic field line commutator in which the unidirectional magnetic steel sheets having high magnetic permeability are laminated, and the torque can be increased. In addition, the ratio of the magnetic permeability of the unidirectional magnetic steel sheet in the q-axis direction of the rotor to the magnetic permeability of the non-oriented magnetic steel sheet is 2
The reason why the value is more than 0 and less than 40 is that when it exceeds 20, the salient pole ratio (Lq / Ld) of the motor becomes 8 or more, and a large reluctance torque is obtained. On the other hand, when it is 40 or more, cogging occurs, so it is set to less than 40.
【0009】磁力線整流手段として湾曲した一方向性電
磁鋼板を用い永久磁石を内側に配置した理由は、永久磁
石からの磁束を効率よくステータティースに流すことが
でき、かつ、リラクタンストルクを発生させるq軸のL
qが大きくなるためである。The reason why the permanent magnets are arranged inside by using a curved unidirectional magnetic steel plate as the magnetic force line rectifying means is that the magnetic flux from the permanent magnets can be efficiently flowed to the stator teeth and the reluctance torque is generated. Axis L
This is because q becomes large.
【0010】また、ロータ本体にある各永久磁石の半径
方向外側部分を永久磁石の長辺に沿って切り欠き、ロー
タ外縁のステータとのギャップを大きくし、永久磁石非
配置部外縁のステータとのギャップが小さい段付きギャ
ップ構造にした理由は、永久磁石からの磁束によって発
生するトルクよりリラクタンストルクを積極的に利用し
てコギング抑制の効果を持たせるためである。Also, the radially outer portion of each permanent magnet in the rotor body is cut out along the long side of the permanent magnet to widen the gap with the stator on the outer edge of the rotor, and with the stator on the outer edge of the permanent magnet non-arranged portion. The reason for adopting the stepped gap structure with a small gap is that the reluctance torque is positively used rather than the torque generated by the magnetic flux from the permanent magnet to have the effect of suppressing the cogging.
【0011】[0011]
【実施例】以下実施例に基づき説明する。
[実施例1]図1は本発明の実施例1を示す図である。
図1ではステータ1の内側に、積層されてロータを形成
するロータ本体2が示されている。ロータ本体2には円
周方向に等間隔に8個の矩形の切り欠き3が形成され、
この切り欠き3内に8個の永久磁石4が埋め込まれてい
る。これらの永久磁石4は隣り合ったものが反対の磁極
を持つように埋め込まれている。永久磁石の数は8個以
外でもよいが、上記のように隣り合ったものが反対の磁
極を持つようにするために偶数であることが必要であ
る。EXAMPLES Examples will be described below. [First Embodiment] FIG. 1 is a diagram showing a first embodiment of the present invention.
In FIG. 1, a rotor body 2 that is stacked inside to form a rotor is shown inside the stator 1. Eight rectangular notches 3 are formed on the rotor body 2 at equal intervals in the circumferential direction,
Eight permanent magnets 4 are embedded in the notch 3. These permanent magnets 4 are embedded so that adjacent ones have opposite magnetic poles. The number of permanent magnets may be other than eight, but it is necessary that the number of permanent magnets is even in order that adjacent magnets have opposite magnetic poles as described above.
【0012】そして、このロータ本体2には上記の様に
埋め込まれた各永久磁石4をそれぞれ囲むようなU字状
の切り欠き5が形成され、各切り欠き5内には一方向性
電磁鋼板積層体6が埋め込まれている。この場合は圧延
方向のμが0.115H/mの一方向性電磁鋼板(0.
23mm厚)を整流子用に、L+Cのμが0.004H/
mの無方向性電磁鋼板(0.5mm厚)をロータ本体に用
いて構成しているので、Lq/Ld比が増大して大きな
トルクを得ることができる。永久磁石はフェライトを用
い、形状は単純な矩形であるので成形が簡単であり、一
方、磁気整流子用の一方向性電磁鋼板積層体も電磁鋼板
を積層しただけであるので製造が容易である。A U-shaped cutout 5 is formed in the rotor body 2 so as to surround each of the permanent magnets 4 embedded as described above, and each cutout 5 has a unidirectional electrical steel sheet. The laminated body 6 is embedded. In this case, μ in the rolling direction is 0.115 H / m for grain-oriented electrical steel sheets (0.
23mm thick) for commutator, L + C μ is 0.004H /
Since the non-oriented electrical steel sheet of m (0.5 mm thickness) is used for the rotor body, the Lq / Ld ratio is increased and a large torque can be obtained. Ferrite is used for the permanent magnet, and the shape is simple rectangle, so it is easy to form. On the other hand, the unidirectional electrical steel sheet laminate for the magnetic commutator is also easy to manufacture because it is simply laminated electromagnetic steel sheets. .
【0013】[実施例2]図2は実施例2の形態の構造
を示すものであって、実施例1の形態をやや変更したも
のであるが、ロータに形成する一方向性電磁鋼板積層体
6を埋め込む切り欠き5を小さくしてロータの強度の向
上を図ったものである。切り欠き5はそれぞれ2分割さ
れて、その中に埋め込まれる一方向性電磁鋼板積層体6
もそれぞれ2分割されている。ここでロータ本体側に段
付きギャップ7を設けることで、q軸側の透磁率Lqが
向上し、逆に切り欠きを形成したことでd軸側の透磁率
Ldが減少し、この形状効果でさらにLq/Ld比が増
大した[Embodiment 2] FIG. 2 shows the structure of the embodiment 2, which is a slight modification of the embodiment 1, but a unidirectional electromagnetic steel sheet laminate formed on a rotor. It is intended to improve the strength of the rotor by reducing the notch 5 in which 6 is embedded. The notches 5 are each divided into two, and the unidirectional electrical steel sheet laminate 6 embedded in the notches 5 is formed.
Is also divided into two. Here, by providing the stepped gap 7 on the rotor body side, the magnetic permeability Lq on the q-axis side is improved, and conversely by forming the notch, the magnetic permeability Ld on the d-axis side is reduced, and this shape effect Further increased Lq / Ld ratio
【0014】[0014]
【発明の効果】各請求項に記載の本発明によれば、ロー
タ本体に永久磁石を埋め込むタイプのロータが提供され
るが、ロータ本体に埋め込む永久磁石の形状は磁力線整
流手段の形状とは異なり、単純な矩形とされているので
製造が簡単である。磁力線整流手段は電磁鋼板を埋め込
むことで形成されるので、ロータ板を折り曲げたり、溝
を形成したりする必要がなく製造が簡単である。According to the present invention described in each claim, a rotor of the type in which a permanent magnet is embedded in the rotor body is provided, but the shape of the permanent magnet embedded in the rotor body is different from the shape of the magnetic force line rectifying means. Since it is a simple rectangle, it is easy to manufacture. Since the magnetic force line rectifying means is formed by embedding an electromagnetic steel plate, it is not necessary to bend the rotor plate or form a groove, and the manufacture is simple.
【0015】特に、請求項2のように磁力線整流子とロ
ータ本体をそれぞれ一方向性電磁鋼板と無方向性電磁鋼
板とし、透磁率の比を決めることでトルクが増大する。In particular, as in claim 2, the magnetic field line commutator and the rotor body are made of a unidirectional magnetic steel sheet and a non-oriented magnetic steel sheet, respectively, and the torque is increased by determining the magnetic permeability ratio.
【図1】本発明の実施例1の形態を説明する図である。FIG. 1 is a diagram illustrating a form of a first embodiment of the present invention.
【図2】本発明の実施例2の形態を説明する図である。FIG. 2 is a diagram illustrating a form of a second embodiment of the present invention.
1 ステータ 2 ロータ本体
3 切り欠き(永久磁石用) 4 永久磁石
5 切り欠き(一方向性電磁鋼板用)
6 一方向性電磁鋼板積層体 7 段付きギャ
ップ1 Stator 2 Rotor body 3 Notch (for permanent magnet) 4 Permanent magnet 5 Notch (for unidirectional electrical steel sheet) 6 Unidirectional electrical steel sheet laminate 7 Stepped gap
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) H02K 19/10 H02K 19/10 A 21/16 21/16 M (72)発明者 開道 力 千葉県富津市新富20−1 新日本製鐵株式 会社技術開発本部内 (72)発明者 籔本 政男 千葉県富津市新富20−1 新日本製鐵株式 会社技術開発本部内 Fターム(参考) 5H002 AA06 AB07 AC06 AC08 AE08 5H615 AA01 BB01 BB07 BB14 PP02 PP07 SS05 SS10 SS15 TT04 TT05 5H619 AA01 BB01 BB13 BB15 BB24 PP02 PP05 PP06 5H621 BB07 GA01 GA04 HH01 JK03 JK05 5H622 AA03 CA02 CA10 CB01 CB05 PP07 PP10 QA10 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI Theme Coat (reference) H02K 19/10 H02K 19/10 A 21/16 21/16 M (72) Inventor Kaido Michi Futtsu City, Chiba Prefecture 20-1 Shintomi Nippon Steel Co., Ltd. Technology Development Headquarters (72) Inventor Masao Washimoto 20-1 Shintomi, Futtsu City, Chiba F-Term (Technical Reference Section), Technology Development Headquarters, Nippon Steel Co., Ltd. 5H002 AA06 AB07 AC06 AC08 AE08 5H615 AA01 BB01 BB07 BB14 PP02 PP07 SS05 SS10 SS15 TT04 TT05 5H619 AA01 BB01 BB13 BB15 BB24 PP02 PP05 PP06 5H621 BB07 GA01 GA04 HH01 JK03 JK05 5H622 AA03 CA02 CA10 CB01 CB05 PP07 PP10 QA
Claims (3)
てなるロータ本体の外周近傍の内側へ、偶数個の板状の
永久磁石を円周方向に等間隔に、ロータ外側から見てN
極、S極を交互に配設し、各永久磁石のロータ中心側を
通り、隣接する各永久磁石との間隙部分を抜けてロータ
の外周部に達する各永久磁石の周りのロータ内のq軸磁
力線を収束して整流する磁力線整流手段として一方向性
電磁鋼板を配設した永久磁石同期モータのロータにおい
て、一方向性電磁鋼板の透磁率をμ1、無方向性電磁鋼
板の透磁率をμ2とした時に、 20<μ1/μ2<40 を満足することを特徴とする永久磁石同期モータのロー
タ。1. An even number of plate-shaped permanent magnets inside the rotor main body, which is formed by stacking punched pieces of non-oriented electrical steel sheets, at equal intervals in the circumferential direction when viewed from the outside of the rotor.
The q-axis in the rotor around the permanent magnets, in which the poles and the S poles are arranged alternately, pass through the rotor center side of each permanent magnet, pass through the gap between the adjacent permanent magnets, and reach the outer periphery of the rotor. In a rotor of a permanent magnet synchronous motor in which a unidirectional magnetic steel sheet is arranged as magnetic force rectifying means for converging and rectifying the magnetic force lines, the magnetic permeability of the unidirectional magnetic steel sheet is μ1, and the magnetic permeability of the non-oriented magnetic steel sheet is μ2. A rotor for a permanent magnet synchronous motor, which satisfies 20 <μ1 / μ2 <40 when
かって湾曲したU字状の一方向性電磁鋼板と湾曲内側に
配置した永久磁石をロータに埋め込んで成ることを特徴
とする請求項1に記載の永久磁石同期モータのロータ。2. The magnetic force line rectifying means, wherein a U-shaped unidirectional electromagnetic steel plate curved toward the outside of the rotor and a permanent magnet arranged inside the curved surface are embedded in the rotor. Permanent magnet synchronous motor rotor.
外側部分の無方向性電磁鋼板を永久磁石の長辺に沿って
切り欠き、ロータ外縁とステータとのギャップを大きく
し、永久磁石非配置部外縁とステータとのギャップを小
さくした段付きギャップ構造を有することを特徴とする
請求項1または2に記載の永久磁石同期モータのロー
タ。3. The non-oriented electrical steel sheet on the outer side of each permanent magnet embedded in the rotor body is cut out along the long side of the permanent magnet to increase the gap between the outer edge of the rotor and the stator so that no permanent magnet is arranged. The rotor for a permanent magnet synchronous motor according to claim 1 or 2, wherein the rotor has a stepped gap structure in which a gap between the outer edge of the part and the stator is reduced.
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JP2002071265A JP2003274590A (en) | 2002-03-15 | 2002-03-15 | Rotor of permanent-magnet synchronous motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002071265A JP2003274590A (en) | 2002-03-15 | 2002-03-15 | Rotor of permanent-magnet synchronous motor |
Publications (1)
Publication Number | Publication Date |
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JP2003274590A true JP2003274590A (en) | 2003-09-26 |
Family
ID=29201589
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JP2002071265A Withdrawn JP2003274590A (en) | 2002-03-15 | 2002-03-15 | Rotor of permanent-magnet synchronous motor |
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WO2006118219A1 (en) * | 2005-04-28 | 2006-11-09 | Denso Corporation | Motor and control device thereof |
WO2006126552A1 (en) * | 2005-05-24 | 2006-11-30 | Denso Corporation | Motor and control device thereof |
JP2009060721A (en) * | 2007-08-31 | 2009-03-19 | Mitsui High Tec Inc | Rotor laminated-core for reluctance motor |
JP2010022194A (en) * | 2004-03-12 | 2010-01-28 | Daikin Ind Ltd | Permanent magnet electric motor, refrigerant compressor, and blower |
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2002
- 2002-03-15 JP JP2002071265A patent/JP2003274590A/en not_active Withdrawn
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010022194A (en) * | 2004-03-12 | 2010-01-28 | Daikin Ind Ltd | Permanent magnet electric motor, refrigerant compressor, and blower |
US7816822B2 (en) | 2005-04-28 | 2010-10-19 | Denso Corporation | Motor and control unit thereof |
WO2006118219A1 (en) * | 2005-04-28 | 2006-11-09 | Denso Corporation | Motor and control device thereof |
WO2006126552A1 (en) * | 2005-05-24 | 2006-11-30 | Denso Corporation | Motor and control device thereof |
US7911107B2 (en) | 2005-05-24 | 2011-03-22 | Denso Corporation | AC electric motor |
JP2009060721A (en) * | 2007-08-31 | 2009-03-19 | Mitsui High Tec Inc | Rotor laminated-core for reluctance motor |
JP2014007803A (en) * | 2012-06-22 | 2014-01-16 | Hitachi Industrial Equipment Systems Co Ltd | Rotary electric machine and permanent magnet synchronous machine |
CN104488171A (en) * | 2012-06-26 | 2015-04-01 | 日产自动车株式会社 | Variable magnetomotive force rotary electric machine and control device for variable magnetomotive force rotary electric machine |
CN103580401A (en) * | 2013-01-21 | 2014-02-12 | 雷勃电气(苏州)有限公司 | Magnet leading-in groove tool |
CN103117608A (en) * | 2013-02-20 | 2013-05-22 | 上海中科深江电动车辆有限公司 | Method for manufacturing synchronous reluctance motor rotor structure and related components |
JP2015198513A (en) * | 2014-04-01 | 2015-11-09 | 富士電機株式会社 | Embedded magnet type rotary electric machine |
CN109245366A (en) * | 2018-11-19 | 2019-01-18 | 西安清泰科新能源技术有限责任公司 | A kind of motor rotor punching sheet and the permanent magnet synchronous motor using the punching |
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CN113098172A (en) * | 2021-05-10 | 2021-07-09 | 山东大学 | Uneven air gap structure for weakening inherent shaft voltage of built-in permanent magnet motor |
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