JPH0683556B2 - Flat motor - Google Patents

Flat motor

Info

Publication number
JPH0683556B2
JPH0683556B2 JP4755285A JP4755285A JPH0683556B2 JP H0683556 B2 JPH0683556 B2 JP H0683556B2 JP 4755285 A JP4755285 A JP 4755285A JP 4755285 A JP4755285 A JP 4755285A JP H0683556 B2 JPH0683556 B2 JP H0683556B2
Authority
JP
Japan
Prior art keywords
magnetic pole
pole piece
slits
magnetic
flat plate
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.)
Expired - Lifetime
Application number
JP4755285A
Other languages
Japanese (ja)
Other versions
JPS61207164A (en
Inventor
文男 田島
邦夫 宮下
博 片山
▲禎▼三 田村
憲一 弘中
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4755285A priority Critical patent/JPH0683556B2/en
Publication of JPS61207164A publication Critical patent/JPS61207164A/en
Publication of JPH0683556B2 publication Critical patent/JPH0683556B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、扁平モータに係り、磁極付の扁平モータで、
小形軽量、かつコギングトルクの小さい扁平モータに関
するものである。Description: TECHNICAL FIELD The present invention relates to a flat motor, which is a flat motor with magnetic poles.
The present invention relates to a flat motor that is small, lightweight, and has a small cogging torque.

〔発明の背景〕[Background of the Invention]

一般に、軸方向の空隙を有する扁平小形モータにおいて
は、コアレスモータを使用する場合が多い。Generally, a coreless motor is often used in a flat small motor having an axial gap.

このコアレスモータは、構造は簡単であるが、磁気的な
空隙長が大となり、扁平化には限界がある。This coreless motor has a simple structure, but has a large magnetic air gap length, and there is a limit to flattening.

これにたいし、磁極付モータは、磁気的空隙が小さいた
め、磁石の厚さを小さくでき、扁平化ができるが、突極
性に基づき、コギングトルクが発生するという問題があ
つた。On the other hand, in the magnetic pole motor, since the magnetic gap is small, the thickness of the magnet can be reduced and the magnet can be flattened, but there is a problem that cogging torque is generated due to the saliency.

このような磁極付モータについて、さきに開発した実願
昭59-70290号に係るものにより、その構造を次に説明す
る。The structure of such a magnetic pole motor will be described below with reference to the previously developed Japanese Patent Application No. 59-70290.

そして、ここでは、回転子８極、固定子６磁極の構造の
ものについて説明する。Then, a structure having 8 rotors and 6 stators will be described here.

すなわち、第２図は、既開発に係る磁極付扁平モータの
略示断面図、第３図は、その固定子要部の平面図であ
る。That is, FIG. 2 is a schematic cross-sectional view of a flat motor with magnetic poles according to an already developed product, and FIG. 3 is a plan view of a main part of the stator.

図において、固定子１は、磁性体からなるヨーク２と、
電機子巻線3,磁極4,磁極片5Aに係る磁極片部51A〜56A,
ベアリングケース6,ベアリング７などで構成されるもの
である。In the figure, a stator 1 includes a yoke 2 made of a magnetic material,
Armature windings 3, magnetic poles 4, magnetic pole pieces 51A to 56A related to the magnetic pole pieces 5A,
The bearing case 6 and the bearing 7 are included.

一方、回転子８は、磁石に係る永久磁石９と磁石ケース
10,シヤフト11とからなり、前記のベアリング７によつ
て回転しうるように支承されているものである。On the other hand, the rotor 8 is composed of a permanent magnet 9 related to the magnet and a magnet case.
The shaft 10 and the shaft 11 are rotatably supported by the bearing 7.

このうち、固定子１は、円板状のヨーク２の一面に該ヨ
ークの周方向に向けて必要数（本例では６ケ）の磁極４
を所定の間隔をおいて配設し、これらの磁極４に電機子
巻線３を巻装すると共に一面に磁極片部51A〜56Aを固定
して成る。Among them, the stator 1 has a required number (6 in this example) of magnetic poles 4 on one surface of the disk-shaped yoke 2 in the circumferential direction of the yoke.
Are arranged at predetermined intervals, the armature winding 3 is wound around these magnetic poles 4, and magnetic pole piece portions 51A to 56A are fixed on one surface.

一方、回転子８は、回転子本体となる円板状の磁石ケー
ス10に該磁石ケースの周方向に向けて必要数（本例では
８ケ）の界磁用の永久磁石９を配設して成る。On the other hand, the rotor 8 includes a disk-shaped magnet case 10 serving as a rotor body, and a required number (eight in this example) of field-use permanent magnets 9 arranged in the circumferential direction of the magnet case. Consists of

また、上記固定子１と回転子８とが、磁極片5Aを界磁磁
石９に対向させた状態で回転子軸方向に空隙を介して配
置してある。Further, the stator 1 and the rotor 8 are arranged with a gap in the rotor axial direction with the pole piece 5A facing the field magnet 9.

しかして、この構成のものは、永久磁石９と対向する磁
極片5Aが、磁極片部51A〜56Aという各個別の部品（ここ
では６ケ）で構成しているため、コギングトルクの発生
に最も影響が大きい、各磁極片部間の間隔51s〜56sの精
度が不十分となる恐れがある点、また、各磁極片部の個
々の厚さが、僅かずつ異なる点に起因する空隙長の不平
衡等を生ずる恐れがあるという問題があり、コギングト
ルクの発生を大きくするという場合があるものである。In this structure, however, the pole piece 5A facing the permanent magnet 9 is composed of the individual pieces (six pieces in this case) of the pole piece portions 51A to 56A, which is most suitable for generating cogging torque. The gap 51 s to 56 s between the pole pieces, which has a large influence, may be insufficient in accuracy, and the gap between the pole pieces may be slightly different from each other. There is a problem that balance or the like may occur, which may increase the generation of cogging torque.

また、磁極片5Aは、各磁極片部に係る個別の部品で構成
されているため、部品点数が大となるものであつた。Further, since the magnetic pole piece 5A is composed of individual parts related to each magnetic pole piece part, the number of parts is large.

〔発明の目的〕[Object of the Invention]

本発明は、小形扁平化が可能な磁極付扁平モータについ
て、部品点数が少なく、かつコギングトルクの少ない構
成とした扁平モータの提供を、その目的とするものであ
る。An object of the present invention is to provide a flat motor with a magnetic pole that can be made small and flat, having a small number of parts and a small cogging torque.

〔発明の概要〕[Outline of Invention]

本発明は上記目的を達成するために、前記した固定子1,
回転子８を備えた扁平モータのうち、固定子側の磁極片
を次のように構成した（なお、以下に述べる構成要素に
付した符号は、発明の把握を容易にするため第１図の実
施例の符号を便宜的に引用したもので、本発明の構成要
素となるものではない）。In order to achieve the above object, the present invention provides the above-mentioned stator 1,
In the flat motor having the rotor 8, the magnetic pole pieces on the stator side are configured as follows (note that the reference numerals given to the components described below are shown in FIG. 1 to facilitate understanding of the invention. The reference numerals of the embodiments are cited for convenience and do not constitute the constituent elements of the present invention).

すなわち、本発明における、磁極片５（第２図の符号5A
のものに代わるもの）は一枚の環状の平板とし、この磁
極片５となる平板に該平板の径方向に向けて形成された
スリット51a〜56aがそれぞれ前記電機子巻線３付き磁極
４の磁極間の間隙位置に対応して配設され、このスリッ
ト51a〜56aにより前記電機子巻線３付き磁極４のそれぞ
れに対応する磁極片部51〜56が区分け形成され、且つ前
記磁極片５となる平板には、スリット51a〜56aの少なく
とも長さ方向一端或いはスリットの中にスリット未形成
部を確保して（第１図では、一例としてスリットの長さ
方向両端に符号51b〜56b及び51c〜56cに示すようにスリ
ット未形成部を確保している）、このスリット未形成部
がブリッジとなって前記磁極片部51a〜56a同士を連結し
て成る。That is, in the present invention, the pole piece 5 (reference numeral 5A in FIG. 2) is used.
Of the magnetic pole 4 with the armature winding 3 is a ring-shaped flat plate, and the slits 51a to 56a formed in the flat plate serving as the magnetic pole piece 5 in the radial direction of the flat plate are respectively formed. The slits 51a to 56a are arranged corresponding to the gap positions between the magnetic poles, and the magnetic pole piece portions 51 to 56 corresponding to the magnetic poles 4 with the armature winding 3 are formed separately, and the magnetic pole pieces 5 and In this flat plate, at least one end in the length direction of the slits 51a to 56a or a slit unformed portion is secured in the slit (in FIG. 1, as an example, reference numerals 51b to 56b and 51c The slit-unformed portion is secured as shown by 56c), and the slit-unformed portion serves as a bridge to connect the magnetic pole piece portions 51a to 56a to each other.

さらに補足すると、本発明における、前記磁極片部及び
スリットの数は、固定子側の磁極の数に対応するもの
で、その数を第１図のものに限定するものでないことは
勿論のことである。Further complementingly, the number of the magnetic pole pieces and the slits in the present invention corresponds to the number of magnetic poles on the stator side, and it goes without saying that the number is not limited to that in FIG. is there.

なお、本発明の作用については、実施例での説明を参照
されたい。For the operation of the present invention, refer to the description in the embodiments.

〔発明の実施例〕Example of Invention

本発明に係る扁平モータの一実施例を、さきの第2,3図
をも合せ、第１図を参照して説明する。An embodiment of the flat motor according to the present invention will be described with reference to FIGS. 1 and 2 together with FIGS.

ここで、第１図は、本発明の一実施例に係る扁平モータ
の固定子における磁極片の平面図である。Here, FIG. 1 is a plan view of magnetic pole pieces in a stator of a flat motor according to an embodiment of the present invention.

しかして、本実施例に係る扁平モータというのは、さき
の第２図に示した扁平モータにおいて、その第３図に示
す磁極片5Aを、第１図に示す磁極片に係る構造として、
扁平モータを構成するようにしたものである。Therefore, the flat motor according to the present embodiment is the flat motor shown in FIG. 2 in which the magnetic pole piece 5A shown in FIG. 3 is the structure relating to the magnetic pole piece shown in FIG.
It is configured to form a flat motor.

第１図において、５は磁極片、51〜56は磁極片部、51a
〜56aはスリツト部、51b〜56b,51c〜56cはブリツジ部で
ある。In FIG. 1, 5 is a magnetic pole piece, 51 to 56 are magnetic pole piece portions, and 51a.
˜56a are slit parts, and 51b˜56b, 51c˜56c are bridging parts.

しかして、６ケの磁極片部51〜56は、一枚の平板より製
作し、かつ、全体は内外周に設けられた、僅かなブリツ
ジ部51b〜56b,51c〜56cを介して一体に構成し、磁気的
には、スリツト部51a〜56aによつて大略分離するように
したものである。Therefore, the six magnetic pole piece portions 51 to 56 are made of one flat plate, and are integrally formed through a few bridging portions 51b to 56b, 51c to 56c provided on the inner and outer circumferences. However, magnetically, the slit portions 51a to 56a are used to separate them from each other.

さらに、上記磁極片５の構成を具体的に説明すると、磁
極片５は一枚の環状の平板としてある。この磁極片５と
なる平板に６ケの各スリット51a〜56aが該平板の径方向
に向けて形成してある。これらのスリット51a〜56aは、
上記平板の周方向に等間隔で配置されて、第２図，第３
図に示すような電機子巻線３付き磁極４の磁極間の間隙
位置に対応して配設され、このスリット51a〜56aにより
電機子巻線３付き磁極４のそれぞれに対応する磁極片部
51〜56が区分け形成される。Further, the structure of the magnetic pole piece 5 will be specifically described. The magnetic pole piece 5 is a single annular flat plate. Six slits 51a to 56a are formed on the flat plate which becomes the magnetic pole piece 5 in the radial direction of the flat plate. These slits 51a-56a are
2 and 3 are arranged at equal intervals in the circumferential direction of the flat plate.
As shown in the figure, the magnetic pole pieces are arranged corresponding to the gap positions between the magnetic poles 4 with the armature winding 3 and the slits 51a to 56a correspond to the magnetic poles 4 with the armature winding 3 respectively.
51 to 56 are formed separately.

また、磁極片５となる平板には、スリット51a〜56aの長
さ方向の両端位置、換言すれば、円板５のうちスリット
51a〜56aがある位置の内外周寄りの位置に細幅なスリッ
ト未形成部51b〜56b及び51c〜56cを確保して、このスリ
ット未形成部をブリッジ部とし、これらのブリッジ部51
b〜56b及び51c〜56bにより磁極片部51a〜56a同士を連結
して成る。このブリッジ部の幅は、磁気漏洩を極力抑制
させて固定子としての働きに支障が生じないように、ま
た、磁極片の強度を維持する配慮をなしつつ、極力幅狭
に設定してある。Further, on the flat plate that becomes the magnetic pole piece 5, both ends of the slits 51a to 56a in the length direction, in other words, the slits of the circular plate 5 are formed.
51a to 56a are provided at positions closer to the inner and outer circumferences of the slits, and narrow slit-unformed portions 51b to 56b and 51c to 56c are secured, and the slit-unformed portions are used as bridge portions.
The magnetic pole pieces 51a to 56a are connected to each other by b to 56b and 51c to 56b. The width of the bridge portion is set as narrow as possible in order to suppress magnetic leakage as much as possible so as not to hinder the function of the stator and to maintain the strength of the magnetic pole pieces.

ここで、スリツト部51a〜56aの製作法は、打抜きによつ
ても、あるいは、エツチング等によつても可能である。Here, the slit parts 51a to 56a can be manufactured by punching, etching, or the like.

以上の構成によれば、磁極片部51〜56が、同一の板より
製作されるために、各磁極片部間の板厚の差が少なく、
空隙が正確になるものである。According to the above configuration, since the magnetic pole piece portions 51 to 56 are manufactured from the same plate, the difference in plate thickness between the magnetic pole piece portions is small,
The void is accurate.

また、各スリツト部の寸法精度もよくすることができる
ために、コギングトルクは、第３図に係る構成に対し
て、非常に小さくなる。Further, since the dimensional accuracy of each slit portion can be improved, the cogging torque becomes much smaller than that of the configuration shown in FIG.

さらに、磁極片５が１枚ということで、その部品点数が
少なく、磁極付扁平モータの欠点をカバーしうるもので
ある。Further, since the number of the magnetic pole pieces 5 is one, the number of parts is small, and the drawback of the flat motor with magnetic poles can be covered.

なお、第１図の実施例では、内外周の両方にブリツジ部
51b〜56b,51c〜56cを設けたが、いずれか一方でもよ
く、また、ブリツジ部の位置は、スリツト部51a〜56aの
中間位置でも、同様の効果が得られる。これらの場合
は、ブリツジ部が１個ということで、磁気的な漏洩が少
ないという利点がある。In the embodiment shown in FIG. 1, the bridging portions are formed on both the inner and outer circumferences.
Although 51b to 56b and 51c to 56c are provided, either one may be provided, and the same effect can be obtained even if the position of the bridging portion is an intermediate position between the slit portions 51a to 56a. In these cases, since there is one bridging portion, there is an advantage that magnetic leakage is small.

また、本実施例に係る構造は、回転子８極，固定子６磁
極構造で示したが、これらの個数の極に限定されるもの
ではない。さらに、固定子側に補助的な突極を有するも
の、あるいは磁極片が多層になつた構成のものに対して
も有効なものである。Further, although the structure according to the present embodiment is shown as a rotor 8-pole structure and a stator 6-pole structure, the structure is not limited to these numbers of poles. Further, the present invention is also effective for a stator having auxiliary salient poles on the stator side or a structure having a multi-layered pole piece.

〔発明の効果〕〔The invention's effect〕

本発明によれば、コギングトルクが小さく、かつ部品点
数が少なくて生産性のよい磁極付の扁平モータを提供し
うるものであつて、実用的にすぐれた効果を有する発明
ということができる。According to the present invention, it is possible to provide a flat motor with magnetic poles, which has a small cogging torque, a small number of parts, and good productivity, and can be said to be an invention having practically excellent effects.

【図面の簡単な説明】[Brief description of drawings]

第１図は、本発明の一実施例に係る扁平モータの固定子
における磁極片の平面図、第２図は、既開発に係る磁極
付扁平モータの略示断面図、第３図は、その固定子要部
の平面図である。 １……固定子、２……ヨーク、３……電機子巻線、４…
…磁極、５……磁極片、51〜56……磁極片部、51a〜56a
……スリツト部、51b〜56b,51c〜56c……ブリツジ部、
８……回転子、９……永久磁石。FIG. 1 is a plan view of a magnetic pole piece in a stator of a flat motor according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of a flat motor with a magnetic pole according to an existing development, and FIG. FIG. 3 is a plan view of a main part of a stator. 1 ... Stator, 2 ... Yoke, 3 ... Armature winding, 4 ...
... Magnetic poles, 5 ... Magnetic pole pieces, 51-56 ... Magnetic pole pieces, 51a-56a
...... Slit part, 51b to 56b, 51c to 56c …… Bridge part,
8 ... Rotor, 9 ... Permanent magnet.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 田村 ▲禎▼三 茨城県勝田市大字稲田1410番地 株式会社 日立製作所東海工場内 (72)発明者 弘中 憲一 茨城県日立市東多賀町１丁目１番１号 株 式会社日立製作所多賀工場内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tamura ▲ Sadao ▼ 1410 Inada, Katsuta City, Ibaraki Prefecture, Tokai Plant, Hitachi Ltd. (72) Kenichi Hironaka 1-1-1, Higashitaga-cho, Hitachi, Ibaraki No. Stock Company Hitachi Ltd. Taga Factory

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】円板状のヨーク（２）の一面に該ヨークの
周方向に向けて必要数の磁極（４）を配設し、これらの
磁極（４）に電機子巻線（３）を巻装すると共に一面に
磁極片（５）を固定して成る固定子（１）と、固転子本
体となる円板状の磁石ケース（10）に該磁石ケースの周
方向に向けて必要数の界磁磁石（９）を配設して成る回
転子（８）とを、前記磁極片（５）を前記界磁磁石
（９）に対向させた状態で回転子軸方向に空隙を介して
配置した扁平モータにおいて、 前記磁極片（５）は一枚の環状の平板とし、この磁極片
（５）となる平板に該平板の径方向に向けて形成された
スリット（51a〜56a）がそれぞれ前記電機子巻線（３）
付き磁極（４）の磁極間の間隙位置に対応して配設さ
れ、このスリット（51a〜56a）により前記電機子巻線
（３）付き磁極（４）のそれぞれに対応する磁極片部
（51〜56）が区分け形成され、且つ前記磁極片（５）と
なる平板には、前記スリット（51a〜56a）の少なくとも
長さ方向一端或いはスリットの中にスリット未形成部を
確保して、このスリット未形成部がブリッジとなって前
記磁極片部（51a〜56a）同士を連結して成ることを特徴
とする扁平モータ。1. A required number of magnetic poles (4) are arranged on one surface of a disk-shaped yoke (2) in the circumferential direction of the yoke, and armature windings (3) are provided on these magnetic poles (4). Needed in the circumferential direction of the stator (1), which is formed by winding a magnetic pole piece (5) on one surface and a disk-shaped magnet case (10), which is the main body of the solid trochanter. A rotor (8) having a number of field magnets (9) arranged, with the magnetic pole pieces (5) facing the field magnets (9) with a gap in the rotor axial direction. In the flat motor arranged as described above, the magnetic pole piece (5) is a single annular flat plate, and the flat plate serving as the magnetic pole piece (5) has slits (51a to 56a) formed in the radial direction of the flat plate. Each armature winding (3)
The magnetic pole pieces (4) are arranged corresponding to the gap positions between the magnetic poles (4) with magnetic poles, and the slits (51a to 56a) correspond to the magnetic pole pieces (4) with the armature winding (3). To 56) are formed separately and the slits (51a to 56a) are formed in at least one longitudinal end of the slits (51a to 56a) or a slit unformed portion is secured in the slits on the flat plate which becomes the magnetic pole piece (5). A flat motor, wherein the unformed portion serves as a bridge, and the magnetic pole piece portions (51a to 56a) are connected to each other.
JP4755285A 1985-03-12 1985-03-12 Flat motor Expired - Lifetime JPH0683556B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4755285A JPH0683556B2 (en) 1985-03-12 1985-03-12 Flat motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4755285A JPH0683556B2 (en) 1985-03-12 1985-03-12 Flat motor

Publications (2)

Publication Number Publication Date
JPS61207164A JPS61207164A (en) 1986-09-13
JPH0683556B2 true JPH0683556B2 (en) 1994-10-19

Family

ID=12778324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4755285A Expired - Lifetime JPH0683556B2 (en) 1985-03-12 1985-03-12 Flat motor

Country Status (1)

Country Link
JP (1) JPH0683556B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5122124B2 (en) * 2006-07-26 2013-01-16 日立金属株式会社 Axial gap type rotating machine, air-conditioning compressor, fan, and automobile equipped with the same
JP5387400B2 (en) * 2009-12-28 2014-01-15 日立工機株式会社 Electric mower

Also Published As

Publication number Publication date
JPS61207164A (en) 1986-09-13

Similar Documents

Publication Publication Date Title
EP0598137B1 (en) Rotor for synchronous motor
US6172438B1 (en) Two-phase permanent-magnet electric rotating machine
EP0582721B1 (en) Rotor of synchronous motor
JPH06245451A (en) Rotor of synchronous motor
JP2000278903A (en) Motor and its manufacture
JPH11313451A (en) Motor
JP3268762B2 (en) Rotor of rotating electric machine and method of manufacturing the same
JPH0736459Y2 (en) Permanent magnet field type rotor
JP2002101585A (en) Rotor structure of synchronous motor
JPH09322446A (en) Brushless motor
JPH0683556B2 (en) Flat motor
JPH03243155A (en) Revolving armature
JP3599145B2 (en) Brushless motor
US20040012297A1 (en) Motor with core, core and method for manufacturing core and motor with core
JPH0537642Y2 (en)
JPS6194548A (en) Permanent magnet rotor
JPH0116382Y2 (en)
JP2945037B2 (en) Small rotating electric machine
EP4329152A1 (en) Rotor
JPH0545088Y2 (en)
JPS61141976U (en)
JPH07222419A (en) Rotating electric machine
JPH0723537A (en) Laminated core for spindle motor
JP2614437B2 (en) Rotating electric machine
JPH0336217Y2 (en)