JPH0799743A - Permanent magnet type rotor - Google Patents
Permanent magnet type rotorInfo
- Publication number
- JPH0799743A JPH0799743A JP5239469A JP23946993A JPH0799743A JP H0799743 A JPH0799743 A JP H0799743A JP 5239469 A JP5239469 A JP 5239469A JP 23946993 A JP23946993 A JP 23946993A JP H0799743 A JPH0799743 A JP H0799743A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnet member
- caps
- shaft
- end parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims description 12
- 229920005992 thermoplastic resin Polymers 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 abstract description 14
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 229930182556 Polyacetal Natural products 0.000 abstract description 5
- 229920006324 polyoxymethylene Polymers 0.000 abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229920001187 thermosetting polymer Polymers 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000004323 axial length Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，例えばステッピングモ
ータ，排水用または循環ポンプ用モータ等のモータを構
成する永久磁石型ロータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet type rotor constituting a motor such as a stepping motor, a drainage motor or a circulation pump motor.
【０００２】[0002]
【従来の技術】従来の永久磁石型ロータの例としては，
図３に示すような構成のものが多用されている。図３に
おいて，１は永久磁石部材であり，例えば異方性フェラ
イト磁石材料により中空円筒状に形成され，外周に軸方
向に延びる複数個の磁極が円周方向に等間隔に設けられ
ている。次に２はシャフトであり，永久磁石部材１を貫
通して設けられると共に，熱可塑性樹脂材料からなる充
填材３によって永久磁石部材１と同軸的に固着されてい
る。2. Description of the Related Art As an example of a conventional permanent magnet type rotor,
A structure as shown in FIG. 3 is often used. In FIG. 3, reference numeral 1 denotes a permanent magnet member, which is formed of, for example, an anisotropic ferrite magnet material in a hollow cylindrical shape, and a plurality of magnetic poles extending in the axial direction are provided on the outer circumference at equal intervals in the circumferential direction. Next, reference numeral 2 denotes a shaft, which is provided so as to penetrate the permanent magnet member 1 and is coaxially fixed to the permanent magnet member 1 by a filler 3 made of a thermoplastic resin material.
【０００３】上記のような永久磁石型ロータを製作する
には，例えば永久磁石部材１とシャフト２とを射出成形
用金型内に同軸的にインサートして保持した状態で，永
久磁石部材１とシャフト２との間に熱可塑性樹脂材料を
射出充填して充填材３を成形することにより，永久磁石
部材１とシャフト２とを同軸的に固着する手段が採用さ
れている。In order to manufacture the permanent magnet type rotor as described above, for example, the permanent magnet member 1 and the shaft 2 are coaxially inserted and held in an injection molding die, and the permanent magnet member 1 and A means for coaxially fixing the permanent magnet member 1 and the shaft 2 by adopting injection molding of a thermoplastic resin material between the shaft 2 and the filler 3 is adopted.
【０００４】この場合，永久磁石部材１を形成する異方
性フェライト磁石材料は脆性であると共に，射出成形用
金型のインサート部内周面と永久磁石部材１の外周面と
の間には若干の隙間があるため，熱可塑性樹脂材料を高
圧で充填した場合の内圧に抗し切れず，永久磁石部材１
にクラックが発生するという問題点がある。In this case, the anisotropic ferrite magnet material forming the permanent magnet member 1 is brittle, and there is a small amount of space between the inner peripheral surface of the insert of the injection molding die and the outer peripheral surface of the permanent magnet member 1. Since there is a gap, the permanent magnet member 1 cannot withstand the internal pressure when the thermoplastic resin material is filled at a high pressure.
There is a problem that cracks occur in the.
【０００５】上記問題点を解決するために，充填材３を
射出成形する際に，永久磁石部材１の外周面にも熱可塑
性樹脂材料からなる外殻層４を成形するという提案があ
る（例えば特開昭53−146760号，同61−58454 号公報参
照）。上記のような提案により，射出成形時において
は，永久磁石部材１に内外両面に充填圧が作用するた
め，脆性なフェライト磁石材料であるに拘らず，前記ク
ラックの発生が防止できるという効果がある。In order to solve the above problems, there is a proposal that the outer shell layer 4 made of a thermoplastic resin material is also formed on the outer peripheral surface of the permanent magnet member 1 when the filler 3 is injection-molded (for example, (See JP-A-53-146760 and JP-A-61-58454). According to the above-mentioned proposal, since the filling pressure acts on the inner and outer surfaces of the permanent magnet member 1 during injection molding, there is an effect that the generation of the crack can be prevented regardless of the brittle ferrite magnet material. .
【０００６】[0006]
【発明が解決しようとする課題】しかしながら上記のよ
うに永久磁石部材１の内外周面に充填材３および外殻層
４を成形する場合には，永久磁石部材１の射出成形用金
型内における位置決め支持手段に工夫が必要であると共
に，射出成形用金型の構造が複雑となる結果，射出成形
用金型の製作費用が高騰し，永久磁石型ロータの製作コ
ストもまた上昇することとなる。However, in the case of molding the filler 3 and the outer shell layer 4 on the inner and outer peripheral surfaces of the permanent magnet member 1 as described above, the permanent magnet member 1 is formed in the injection mold. As the positioning support means needs to be devised and the structure of the injection molding die becomes complicated, the manufacturing cost of the injection molding die rises and the manufacturing cost of the permanent magnet type rotor also rises. .
【０００７】また射出成形後において，永久磁石部材１
の外周面の外殻層４を除去する作業が必要であるが，こ
の除去作業のために余剰の工数と時間を要するため，永
久磁石型ロータの製作コストを高騰させる要因となって
いる。After the injection molding, the permanent magnet member 1
Although it is necessary to remove the outer shell layer 4 on the outer peripheral surface of the magnet, the extra man-hours and time are required for this removal operation, which is a factor of increasing the manufacturing cost of the permanent magnet type rotor.
【０００８】本発明は，上記従来技術に存在する問題点
を解決し，構成部材である永久磁石部材にクラックが発
生せず，信頼性の高い永久磁石型ロータを提供すること
を目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems existing in the prior art and to provide a highly reliable permanent magnet type rotor in which cracks do not occur in the permanent magnet member as a constituent member. Is.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に，本発明においては，焼結磁石材料により中空円筒状
に形成し外周に軸方向に延びる複数個の磁極を設けてな
る永久磁石部材の両端部に，非磁性材料により厚さ0.05
〜0.5mm の中空椀状に形成したキャップを嵌着し, 永久
磁石部材を貫通するシャフトを熱可塑性樹脂材料からな
る充填材により永久磁石部材と同軸的に固着する，とい
う技術的手段を採用した。In order to achieve the above object, in the present invention, a permanent magnet member is formed of a sintered magnet material in a hollow cylindrical shape and provided with a plurality of magnetic poles extending in the axial direction on the outer circumference. A non-magnetic material with a thickness of 0.05
A technical means was adopted in which a cap formed in the shape of a hollow bowl of ~ 0.5 mm was fitted, and the shaft that penetrates the permanent magnet member was fixed coaxially with the permanent magnet member by a filler made of a thermoplastic resin material. .
【００１０】本発明において，キャップの厚さが0.05mm
未満では，射出成形時における永久磁石部材の耐圧性を
向上させる作用が期待できないため好ましくない。一方
キャップの厚さが0.5mm を超えると，モータとして組立
てた場合における永久磁石部材外周面とステータ内周面
との磁気ギャップが大となる結果，モータ特性を低下さ
せるため不都合である。In the present invention, the thickness of the cap is 0.05 mm
If it is less than 1, it is not preferable because the effect of improving the pressure resistance of the permanent magnet member during injection molding cannot be expected. On the other hand, if the thickness of the cap exceeds 0.5 mm, the magnetic gap between the outer peripheral surface of the permanent magnet member and the inner peripheral surface of the stator becomes large when assembled as a motor, resulting in deterioration of the motor characteristics.
【００１１】[0011]
【作用】上記の構成により，充填材の射出成形時におけ
る永久磁石部材の耐圧性を向上させ，内圧によるクラッ
クの発生を防止することができるのである。With the above construction, it is possible to improve the pressure resistance of the permanent magnet member during injection molding of the filler and prevent the occurrence of cracks due to internal pressure.
【００１２】[0012]
【実施例】図１は本発明の実施例を示す図であり，
（ａ）は一部断面正面，（ｂ）は端面を示し，同一部分
は前記図３と同一の参照符号で示す。図１において，永
久磁石部材１は例えば異方性Ｓｒフェライト磁石材料に
よって外径１９mm，内径６mm，軸方向長さ３０mmの中空
円筒状に形成し，外周面に対称位置にＮ，Ｓ磁極を設け
たものである。次にシャフト２は例えば軟鋼丸棒によ
り，外径３mm，軸方向長さ７０mmに加工し，例えばポリ
アセタール樹脂からなる充填材３を介して，永久磁石部
材１に同軸的に固着される。FIG. 1 is a diagram showing an embodiment of the present invention,
(A) shows a partially sectional front view, (b) shows an end face, and the same portions are denoted by the same reference numerals as those in FIG. In FIG. 1, the permanent magnet member 1 is formed of, for example, an anisotropic Sr ferrite magnet material into a hollow cylindrical shape having an outer diameter of 19 mm, an inner diameter of 6 mm, and an axial length of 30 mm, and N and S magnetic poles are provided on the outer peripheral surface at symmetrical positions. It is a thing. Next, the shaft 2 is processed to have an outer diameter of 3 mm and an axial length of 70 mm by a mild steel round bar, for example, and is coaxially fixed to the permanent magnet member 1 via a filler 3 made of, for example, polyacetal resin.
【００１３】５はキャップであり，アルミニウム合金，
ステンレス鋼等の非磁性材料により，例えば厚さ0.1mm
，外径19.2mm，端部内径１１mm，軸方向長さ５mmの中
空椀状に形成し，永久磁石部材１の両端部に圧入により
固着する。この場合，接着剤を併用してもよい。このよ
うなキャップ５を形成するには，プレスによる絞り手段
を使用することが好ましい。Reference numeral 5 denotes a cap, which is an aluminum alloy,
With non-magnetic material such as stainless steel, thickness of 0.1mm
The outer diameter is 19.2 mm, the inner diameter at the end is 11 mm, and the length is 5 mm in the axial direction. In this case, an adhesive may be used together. In order to form such a cap 5, it is preferable to use a drawing means by pressing.
【００１４】上記のような永久磁石型ロータを形成する
には，永久磁石部材１の両端部にキャップ５を固着した
状態で，シャフト２と共に射出成形用金型内にインサー
トして位置決め保持し，例えばポリアセタール樹脂を射
出充填して，充填材３を成形すればよい。射出成形時の
内圧は，永久磁石部材１の両端部に固着したキャップ５
によっても負担されるため，永久磁石部材１の耐圧性が
向上し，クラックの発生を防止することができるのであ
る。To form the permanent magnet type rotor as described above, the caps 5 are fixed to both ends of the permanent magnet member 1, and the permanent magnet member 1 is inserted into the injection molding die together with the shaft 2 and positioned and held. For example, the filling material 3 may be molded by injection-filling a polyacetal resin. The internal pressure at the time of injection molding is the cap 5 fixed to both ends of the permanent magnet member 1.
The pressure resistance of the permanent magnet member 1 is improved, and the occurrence of cracks can be prevented.
【００１５】図２は本発明の実施例における充填材３を
成形する手段の例を示す要部縦断面図である。図２にお
いて，射出成形用金型１０は可動型１１と固定型１２と
から構成される。すなわち下板１３上に設けられた固定
板１４上に固定型１２を設け，この固定型１２上に可動
型１１が設けられる。FIG. 2 is a longitudinal sectional view of an essential part showing an example of means for molding the filler 3 in the embodiment of the present invention. In FIG. 2, the injection molding die 10 is composed of a movable die 11 and a fixed die 12. That is, the fixed die 12 is provided on the fixed plate 14 provided on the lower plate 13, and the movable die 11 is provided on the fixed die 12.
【００１６】可動型１１は型板１５，１６からなり，こ
れらの型板１５，１６にノズル口１７が形成されてい
る。ノズル口１７に連通するスプルー１８は型板１５，
１６に形成されたランナー１９と連通するように設けら
れている。またランナー１９は，型板１６の対応位置に
形成された垂直のゲート２０に連通し，このゲート２０
は横断面がリング状に形成されたキャビティ２１に連通
している。The movable mold 11 comprises mold plates 15 and 16, and nozzle ports 17 are formed in these mold plates 15 and 16. The sprue 18 communicating with the nozzle port 17 has a template 15,
It is provided so as to communicate with the runner 19 formed in 16. The runner 19 communicates with a vertical gate 20 formed at a corresponding position of the template 16, and the gate 20
Communicates with a cavity 21 having a ring-shaped cross section.
【００１７】次に固定型１２内には，キャップ５を両端
部に嵌着された永久磁石部材１を収容保持し得るように
横断面が円形に形成された収容部２２を設け，中心部に
保持されたシャフト２との間にキャビティ２１を形成す
る。２３は下パンチであり，固定型１２の下方の固定板
１４内に上下動可能に設けられ，型板１５，１６と協同
してシャフト２の上下端部を保持する。２４はロッドで
あり，下パンチ２３を駆動し得るように接続する。Next, in the fixed mold 12, there is provided an accommodating portion 22 having a circular cross section so that the cap 5 can accommodate and retain the permanent magnet members 1 fitted at both ends thereof, and the accommodating portion 22 is provided at the center thereof. A cavity 21 is formed between the shaft 21 and the held shaft 2. A lower punch 23 is provided in a fixed plate 14 below the fixed mold 12 so as to be vertically movable, and holds the upper and lower ends of the shaft 2 in cooperation with the mold plates 15 and 16. Reference numeral 24 is a rod, which is connected so as to drive the lower punch 23.
【００１８】上記の構成により，固定型１２の収容部２
２に永久磁石部材１を収容し（この場合，キャップ５の
部位の収容部２２は，キャップ５と当接しないように若
干逃がしておくことが好ましい），シャフト２をインサ
ート後可動型１１を組み合わせ，例えばポリアセタール
樹脂を１００〜１８０℃の温度で，４０〜７０kg/cm2の
圧力でノズル口１７から注入し，スプルー１８，ランナ
ー１９，ゲート２０を介してキャビティ２１内に射出充
填すれば，前記図１に示す充填材３が成形され，永久磁
石部材１とシャフト２とが一体に接合固着されるのであ
る。With the above structure, the housing portion 2 of the fixed die 12
2 in which the permanent magnet member 1 is housed (in this case, it is preferable that the housing part 22 of the portion of the cap 5 is slightly escaped so as not to contact the cap 5), the shaft 2 is inserted, and the movable mold 11 is combined. For example, if polyacetal resin is injected at a temperature of 100 to 180 ° C. at a pressure of 40 to 70 kg / cm 2 from the nozzle port 17 and is injected and filled into the cavity 21 through the sprue 18, runner 19 and gate 20, The filler 3 shown in FIG. 1 is molded, and the permanent magnet member 1 and the shaft 2 are integrally bonded and fixed.
【００１９】キャビティ２１内に充填されたポリアセタ
ール樹脂が冷却固化した後，可動型１１を上方に移動さ
せ，ロッド２４を押し上げて下パンチ２３を上昇させる
ことにより，成形組立体を固定型１２から押出すことが
できる。その後下パンチ２３を元の位置に復帰させ，キ
ャップ５を固着した永久磁石部材１とシャフト２とをイ
ンサートし，可動型１１を固定型１２上に合体させ，次
の成形サイクルを行う。After the polyacetal resin filled in the cavity 21 is cooled and solidified, the movable die 11 is moved upward, the rod 24 is pushed up and the lower punch 23 is raised to push the molding assembly from the fixed die 12. Can be issued. After that, the lower punch 23 is returned to the original position, the permanent magnet member 1 to which the cap 5 is fixed and the shaft 2 are inserted, the movable die 11 is united on the fixed die 12, and the next molding cycle is performed.
【００２０】得られた成形組立体は，シャフト２若しく
は永久磁石部材１に予め設けられた基準部若しくは基準
マークを基準にして所定の着磁を施して永久磁石型ロー
タとして完成させられる。The obtained molded assembly is magnetized in a predetermined manner on the basis of a reference portion or a reference mark provided in advance on the shaft 2 or the permanent magnet member 1 to complete a permanent magnet type rotor.
【００２１】上記構成の永久磁石部材１について耐圧試
験を行ったところ，キャップ５を各々アルミニウム合金
およびＳＵＳ３０４によって前記寸法に形成したものに
ついて，各々２７２kg/cm2，３１０kg/cm2を得た。これ
らは図３に示す従来のものにおける１５０kg/cm2に対し
て各々1.8 倍および2.1 倍に向上していることが確認さ
れた。A pressure resistance test was conducted on the permanent magnet member 1 having the above-mentioned structure. As a result, 272 kg / cm 2 and 310 kg / cm 2 were obtained for the caps 5 each having the above-mentioned dimensions made of aluminum alloy and SUS304. It was confirmed that these were improved 1.8 times and 2.1 times, respectively, with respect to 150 kg / cm 2 in the conventional one shown in FIG.
【００２２】本実施例においては，永久磁石部材１の外
周にＮ，Ｓ２極の磁極を設けた例について記述したが，
４極以上の多極としても同様の作用が期待できる。また
永久磁石部材１を形成する焼結磁石材料としては，Ｓｒ
フェライト以外のフェライト磁石材料は勿論のこと，希
土類系磁石材料も使用できる。In this embodiment, an example in which magnetic poles of N and S2 poles are provided on the outer circumference of the permanent magnet member 1 has been described.
The same effect can be expected even if the number of poles is four or more. Further, as a sintered magnet material for forming the permanent magnet member 1, Sr
Not only ferrite magnet materials other than ferrite but also rare earth magnet materials can be used.
【００２３】[0023]
【発明の効果】本発明は，以上記述のような構成および
作用であるから，下記の効果を奏し得る。 (1) 永久磁石部材の耐圧性が向上するため，クラックの
発生を防止することができ，信頼性を向上させ得る。 (2) シャフト固着用の充填材を成形する射出成形用金型
の構造が簡単であり，金型製作が容易であると共に製作
費用の低減が可能である。 (3) 永久磁石部材に外殻層を形成する必要がないため，
射出成形後の後処理における除去作業が不要となり，製
作コストの低減が可能である。 (4) 永久磁石部材の直径方向の肉厚寸法を磁石特性確保
のための必要最小限の寸法に設定できるため，ロータ全
体の軽量化が可能である。EFFECTS OF THE INVENTION Since the present invention has the structure and operation as described above, the following effects can be obtained. (1) Since the pressure resistance of the permanent magnet member is improved, the occurrence of cracks can be prevented and the reliability can be improved. (2) The structure of the injection mold for molding the filling material for fixing the shaft is simple, and the mold can be manufactured easily and the manufacturing cost can be reduced. (3) Since it is not necessary to form an outer shell layer on the permanent magnet member,
It eliminates the need for post-processing removal work after injection molding, and can reduce manufacturing costs. (4) Since the thickness of the permanent magnet member in the diametrical direction can be set to the minimum required to secure the magnet characteristics, the weight of the rotor as a whole can be reduced.
【図１】本発明の実施例を示す図であり，（ａ）は一部
断面正面，（ｂ）は端面を示す。1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is a partially sectional front view and FIG. 1B is an end face.
【図２】本発明の実施例における充填材３を成形する手
段の例を示す要部縦断面図である。FIG. 2 is a longitudinal sectional view of an essential part showing an example of means for molding the filler 3 in the embodiment of the present invention.
【図３】従来の永久磁石型ロータの例を示す縦断面図で
ある。FIG. 3 is a vertical sectional view showing an example of a conventional permanent magnet type rotor.
１ 永久磁石部材 ３ 充填材 ５ キャップ 1 Permanent magnet member 3 Filler 5 Cap
Claims (1)
外周に軸方向に延びる複数個の磁極を設けてなる永久磁
石部材の両端部に，非磁性材料により厚さ0.05〜0.5mm
の中空椀状に形成したキャップを嵌着し, 永久磁石部材
を貫通するシャフトを熱可塑性樹脂材料からなる充填材
により永久磁石部材と同軸的に固着したことを特徴とす
る永久磁石型ロータ。1. A non-magnetic material having a thickness of 0.05 to 0.5 mm at both ends of a permanent magnet member formed of a sintered magnet material in a hollow cylindrical shape and provided with a plurality of magnetic poles extending in the axial direction on the outer circumference.
A permanent magnet rotor, wherein a hollow bowl-shaped cap is fitted, and a shaft penetrating the permanent magnet member is fixed coaxially with the permanent magnet member by a filler made of a thermoplastic resin material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5239469A JPH0799743A (en) | 1993-09-27 | 1993-09-27 | Permanent magnet type rotor |
| ITTO940333A IT1273158B (en) | 1993-09-27 | 1994-04-26 | ROTOR OF THE PERMANENT MAGNET TYPE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5239469A JPH0799743A (en) | 1993-09-27 | 1993-09-27 | Permanent magnet type rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0799743A true JPH0799743A (en) | 1995-04-11 |
Family
ID=17045237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5239469A Pending JPH0799743A (en) | 1993-09-27 | 1993-09-27 | Permanent magnet type rotor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0799743A (en) |
| IT (1) | IT1273158B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970055076A (en) * | 1995-12-04 | 1997-07-31 | 구자홍 | Electric motor rotor |
| KR100301517B1 (en) * | 1999-07-23 | 2001-11-01 | 구자홍 | Rotor for brushless d.c motor |
| WO2007073084A3 (en) * | 2005-12-21 | 2009-05-22 | Daewoo Electronics Corp | Permanent magnet type dc motor assembly |
| JP2013005494A (en) * | 2011-06-13 | 2013-01-07 | Mitsui High Tec Inc | Method of manufacturing windingly laminated iron core |
| JP2013514754A (en) * | 2009-12-18 | 2013-04-25 | コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Electric motor |
| EP2725688B1 (en) | 2012-10-26 | 2017-01-18 | Grundfos Holding A/S | Rotor for an electric motor |
| CN110741536A (en) * | 2017-06-29 | 2020-01-31 | 日本电产株式会社 | Rotor and motor |
| CN113661636A (en) * | 2019-04-10 | 2021-11-16 | 株式会社Ihi | Motor rotor |
-
1993
- 1993-09-27 JP JP5239469A patent/JPH0799743A/en active Pending
-
1994
- 1994-04-26 IT ITTO940333A patent/IT1273158B/en active IP Right Grant
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR970055076A (en) * | 1995-12-04 | 1997-07-31 | 구자홍 | Electric motor rotor |
| KR100301517B1 (en) * | 1999-07-23 | 2001-11-01 | 구자홍 | Rotor for brushless d.c motor |
| WO2007073084A3 (en) * | 2005-12-21 | 2009-05-22 | Daewoo Electronics Corp | Permanent magnet type dc motor assembly |
| JP2013514754A (en) * | 2009-12-18 | 2013-04-25 | コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Electric motor |
| JP2013005494A (en) * | 2011-06-13 | 2013-01-07 | Mitsui High Tec Inc | Method of manufacturing windingly laminated iron core |
| EP2725688B1 (en) | 2012-10-26 | 2017-01-18 | Grundfos Holding A/S | Rotor for an electric motor |
| US10256679B2 (en) | 2012-10-26 | 2019-04-09 | Grundfos Holding A/S | Rotor for an electric motor |
| CN110741536A (en) * | 2017-06-29 | 2020-01-31 | 日本电产株式会社 | Rotor and motor |
| CN113661636A (en) * | 2019-04-10 | 2021-11-16 | 株式会社Ihi | Motor rotor |
| CN113661636B (en) * | 2019-04-10 | 2024-04-16 | 株式会社Ihi | Motor rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO940333A0 (en) | 1994-04-26 |
| IT1273158B (en) | 1997-07-07 |
| ITTO940333A1 (en) | 1995-10-26 |
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