JP2009089546A - Permanent magnet rotary electric machine for washing machine - Google Patents

Permanent magnet rotary electric machine for washing machine Download PDF

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JP2009089546A
JP2009089546A JP2007258216A JP2007258216A JP2009089546A JP 2009089546 A JP2009089546 A JP 2009089546A JP 2007258216 A JP2007258216 A JP 2007258216A JP 2007258216 A JP2007258216 A JP 2007258216A JP 2009089546 A JP2009089546 A JP 2009089546A
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core
permanent magnet
magnetic pole
stator
rotor
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JP5193547B2 (en
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Kunihiro Sakamoto
国弘 坂本
Haruo Oharagi
春雄 小原木
Eiji Toyoda
栄治 豊田
Hirobumi Narita
博文 成田
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Hitachi Appliances Inc
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Hitachi Appliances Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet rotary electric machine for a washing machine which is applicable to high-speed rotation and has good recyclability. <P>SOLUTION: The permanent magnet rotary electric machine has a stator on which armature windings of concentrated winding are provided so as to surround teeth in a plurality of slots formed in a stator core. Permanent magnets are inserted into a plurality of recessed portions formed on the outside circumference of a yoke core. A rotor having magnetic pole cores covering the top parts of permanent magnets is supported rotatably via a prescribed gap on the inside circumference of the stator. The magnetic pole cores, the permanent magnets, and the yoke core are molded with a synthetic resin. The magnetic pole cores are not mechanically coupled to the yoke core. The inside circumferential surface of teeth, which has a circular arc surface different from that from the rotor center, and the outside circumferential surface of the magnetic pole cores have mutually a protruding shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は洗濯機で用いられる集中巻固定子を採用した永久磁石式回転電機に関するものである。   The present invention relates to a permanent magnet type rotating electrical machine employing a concentrated winding stator used in a washing machine.

洗濯機の回転翼やドラムを駆動する回転電機にはインバータ駆動の永久磁石式電動機が採用されている。最近では洗濯乾燥機が主流となり、省エネを図るには乾燥時の洗濯物の脱水度が重要となる。洗濯物の脱水度を上げるには洗濯槽やドラムの回転速度を上げることが考えられ、永久磁石式回転電機を高速に回転させる必要がある。この種の回転電機の従来例としては特開２００６−３５２９７３号公報に記載のように、回転子の中に１０極の永久磁石を内蔵したものが知られている。   Inverter-driven permanent magnet electric motors are employed in rotating electrical machines that drive the rotating blades and drums of washing machines. Recently, laundry dryers have become mainstream, and the degree of dehydration of laundry during drying is important for energy saving. In order to increase the degree of dehydration of the laundry, it is conceivable to increase the rotation speed of the washing tub and the drum, and it is necessary to rotate the permanent magnet type rotating electric machine at a high speed. As a conventional example of this type of rotating electrical machine, as described in Japanese Patent Application Laid-Open No. 2006-352773, a rotor in which a 10-pole permanent magnet is built is known.

特開２００６−３５２９７３号公報JP 2006-352773 A

しかしながら、特開２００６−３５２９７３号公報に記載のものにおいては、遠心力を受けるのがモールドした合成樹脂であり、高速回転に対応するには合成樹脂の量を多くする必要があった。従って、かかる回転電機を用いた洗濯機においては、リサイクル性が悪くなる問題があった。   However, in the one described in Japanese Patent Application Laid-Open No. 2006-352773, the molded synthetic resin is subjected to centrifugal force, and it is necessary to increase the amount of the synthetic resin to cope with high-speed rotation. Therefore, in a washing machine using such a rotating electric machine, there is a problem that the recyclability is deteriorated.

本発明の目的は、高速回転に対応したリサイクル性の良い洗濯機用永久磁石式回転電機を提供することにある。   An object of the present invention is to provide a permanent magnet type rotating electrical machine for a washing machine that is capable of high-speed rotation and is highly recyclable.

（１）上記目的を解決するために、本発明は、洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、永久磁石の上部を磁極鉄心で覆った回転子が、固定子の内周に所定のギャップを介して回転自在に支承され、磁極鉄心と永久磁石とヨーク鉄心とを合成樹脂にてモールド成形すると共に、磁極鉄心とヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有するティースの内周面と磁極鉄心の外周面が互いに凸形状を有していることを特徴とする。 (1) In order to solve the above-mentioned object, the present invention is used in a washing machine, and concentrated armature windings are provided so as to surround teeth in a plurality of slots formed in a stator core. A rotor having a fixed stator, in which a permanent magnet is housed in a plurality of recesses formed on the outer periphery of the yoke core, and the upper part of the permanent magnet covered with a magnetic core is a predetermined gap on the inner periphery of the stator. The magnetic pole core, the permanent magnet, and the yoke core are molded with a synthetic resin, and the magnetic pole core and the yoke core are not mechanically coupled to each other. The inner peripheral surface of the teeth having different arc surfaces and the outer peripheral surface of the magnetic pole core have a convex shape.

（２）上記の目的を解決するために、本発明は、洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、永久磁石の上部を磁極鉄心で覆った回転子が、固定子の内周に所定のギャップを介して回転自在に支承され、磁極鉄心と永久磁石とヨーク鉄心とを合成樹脂にてモールド成形すると共に、磁極鉄心とヨーク鉄心とが機械的に結合せず、Ｒ０から最も離れたティースの内周面との距離をＨｇとしたとき、（Ｈｇ／Ｈｄ）＜（Ｒ１／Ｒ０）となるようにしたことを特徴とする。
（３）目的を解決するために、本発明は、洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、永久磁石の上部を磁極鉄心で覆った回転子が、固定子の内周に所定のギャップを介して回転自在に支承され、磁極鉄心と永久磁石とヨーク鉄心とを合成樹脂にてモールド成形すると共に、磁極鉄心とヨーク鉄心とが機械的に結合せず、磁極鉄心の最大厚みを約１.９mm以下にしたことを特徴とする。
（４）上記の目的を解決するために、本発明は、洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、永久磁石の上部を磁極鉄心で覆った回転子が、固定子の内周に所定のギャップを介して回転自在に支承され、磁極鉄心と永久磁石とヨーク鉄心とを合成樹脂にてモールド成形すると共に、磁極鉄心とヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有するティースの内周面と磁極鉄心の外周面が互いに凸形状を有し、回転子の半径をＲ０、永久磁石の内周面の回転子中心に最も近接する位置までの距離をＲ１としたとき、比（Ｒ１／Ｒ０）＞０.９５となるようにしたことを特徴とする。 (2) In order to solve the above-described object, the present invention is used in a washing machine, and concentrated armature windings surround teeth in a plurality of slots formed in a stator core. A rotor having a permanent magnet accommodated in a plurality of recesses formed on the outer periphery of the yoke iron core and having the upper portion of the permanent magnet covered with a magnetic pole iron core is provided on the inner circumference of the stator. The magnetic pole core, the permanent magnet, and the yoke core are molded with a synthetic resin, and the magnetic pole core and the yoke core are not mechanically coupled to each other. When the distance from the inner peripheral surface is Hg, (Hg / Hd) <(R1 / R0).
(3) In order to solve the object, the present invention is used in a washing machine, and concentrated winding armature winding is applied so as to surround teeth in a plurality of slots formed in a stator core. A rotor having a permanent magnet accommodated in a plurality of recesses formed on the outer periphery of the yoke iron core, and a rotor whose upper surface is covered with a magnetic pole iron core with a predetermined gap on the inner circumference of the stator. The magnetic pole core, permanent magnet, and yoke core are molded with synthetic resin, and the magnetic pole core and yoke core are not mechanically coupled. It is characterized by being 9 mm or less.
(4) In order to solve the above-described object, the present invention is used in a washing machine, and concentrated armature windings surround teeth in a plurality of slots formed in a stator core. A rotor having a permanent magnet accommodated in a plurality of recesses formed on the outer periphery of the yoke iron core and having the upper portion of the permanent magnet covered with a magnetic pole iron core is provided on the inner circumference of the stator. A magnetic pole core, permanent magnet, and yoke core are molded with a synthetic resin, and the magnetic pole core and yoke core are not mechanically coupled to each other. The inner peripheral surface of the teeth having different arc surfaces and the outer peripheral surface of the magnetic pole core have a convex shape, the radius of the rotor is R0, and the distance to the position closest to the rotor center on the inner peripheral surface of the permanent magnet Where R1 is the ratio (R1 / R0)> 0. It is characterized by being 95.

本発明の形態によれば、かかる構成により、固定子のティース内周面と回転子の磁極鉄心の外周面がお互いに凸形状であるので、固定子と回転子間のギャップが変化し、最小ギャップが１点になるので、モールド樹脂にかかる磁気吸引力が小さくなり、モールド成形の合成樹脂の量を軽減して、高速回転を可能にしリサイクル性を高めることができる洗濯機を提供できる。   According to the aspect of the present invention, such a configuration causes the teeth inner circumferential surface of the stator and the outer circumferential surface of the magnetic pole core of the rotor to be convex with each other, so that the gap between the stator and the rotor changes, and the minimum Since the gap becomes one point, the magnetic attraction force applied to the mold resin is reduced, and the amount of synthetic resin for molding can be reduced, and a washing machine capable of high-speed rotation and improved recyclability can be provided.

以下、本発明の実施の形態について、図面を参照し、説明する。   Embodiments of the present invention will be described below with reference to the drawings.

以下に、本発明の実施例を示す。   Examples of the present invention are shown below.

図１は本発明による永久磁石式回転電機の径方向断面図を示す一実施例である。   FIG. 1 is an embodiment showing a radial sectional view of a permanent magnet type rotating electrical machine according to the present invention.

図２は図１の永久磁石式回転電機の固定子の拡大図である。   FIG. 2 is an enlarged view of the stator of the permanent magnet type rotating electric machine of FIG.

図３は図１の永久磁石式回転電機の回転子の拡大図である。   FIG. 3 is an enlarged view of the rotor of the permanent magnet type rotating electric machine of FIG.

図１〜図３を同時に参照して説明する。   Description will be made with reference to FIGS.

永久磁石式回転電機１は固定子２と回転子３とから構成される。固定子２は、固定子鉄心４とそれに施された複数のスロット５（図では４２個、固定子磁極の突極数Ｍ＝４２となる）と、これらのスロット５で分割されたティース６とを備えている。電機子巻線７（Ｕ相巻線７Ａ，Ｖ相巻線７Ｂ，Ｗ相巻線７Ｃからなる）は、複数のスロット５に巻装された集中巻線である。スロット５の下部がスロット開口部８であり、ティース６の下部が固定子２の磁極鉄心９である。このティース６の内周面は回転子中心Ｏからの円弧でなく、固定子２側の外径側に位置する中心Ｘからの円弧面を形成しているため、回転子側に向かって凸形状を成している。回転子３の外径をＲ０としたとき、ティース６の内周面間の最大ギャップはＨｇとなる。   The permanent magnet type rotating electrical machine 1 includes a stator 2 and a rotor 3. The stator 2 includes a stator core 4 and a plurality of slots 5 (42 in the figure, the number of salient poles M = 42 in the figure) and teeth 6 divided by these slots 5. It has. The armature winding 7 (consisting of a U-phase winding 7A, a V-phase winding 7B, and a W-phase winding 7C) is a concentrated winding wound around the plurality of slots 5. A lower portion of the slot 5 is a slot opening portion 8, and a lower portion of the tooth 6 is a magnetic pole core 9 of the stator 2. The inner peripheral surface of the teeth 6 is not an arc from the rotor center O, but an arc surface from the center X located on the outer diameter side on the stator 2 side, so that it protrudes toward the rotor side. Is made. When the outer diameter of the rotor 3 is R0, the maximum gap between the inner peripheral surfaces of the teeth 6 is Hg.

回転子３は、ヨーク鉄心１０の外周側に配置された凹部１１中に希土類永久磁石１２が配置され（図では５６個、回転子磁極数Ｐ＝５６となる）、希土類永久磁石１２の上部には凸形状を有する回転子３の磁極鉄心１３を配置し、希土類永久磁石１２の両サイドには磁極鉄心１３から延びた磁石係止部１４がある。この状態で回転子３を回転させると、希土類永久磁石１２と磁極鉄心１３が飛び出すので、ヨーク鉄心１０と希土類永久磁石１２と磁極鉄心１３とを合成樹脂１５によってモールド成形し、構成部材の飛び出しを防止している。希土類永久磁石１２の内周側の回転子中心に最も近接する位置までの距離がＲ１回転子３の半径Ｒ０、磁極鉄心１３の外周面は回転子中心Ｏからの円弧でなく、回転子３の内径側に位置する中心Ｙからの円弧面を形成しているため、磁石係止部１４の上部と磁極鉄心１３の外周面との間には高さＨｄの段落し部１６が形成される。   In the rotor 3, rare earth permanent magnets 12 are disposed in recesses 11 disposed on the outer peripheral side of the yoke core 10 (56 in the figure, the number of rotor magnetic poles P = 56), and above the rare earth permanent magnet 12. The magnetic pole core 13 of the rotor 3 having a convex shape is arranged, and magnet locking portions 14 extending from the magnetic pole core 13 are provided on both sides of the rare earth permanent magnet 12. When the rotor 3 is rotated in this state, the rare earth permanent magnet 12 and the magnetic pole core 13 pop out. Therefore, the yoke iron core 10, the rare earth permanent magnet 12 and the magnetic pole core 13 are molded by the synthetic resin 15 and the constituent members are popped out. It is preventing. The distance to the position closest to the rotor center on the inner peripheral side of the rare earth permanent magnet 12 is the radius R0 of the R1 rotor 3, and the outer peripheral surface of the magnetic pole core 13 is not an arc from the rotor center O, but the rotor 3 Since a circular arc surface from the center Y located on the inner diameter side is formed, a stepped portion 16 having a height Hd is formed between the upper portion of the magnet locking portion 14 and the outer peripheral surface of the magnetic pole core 13.

ここで、回転子３の外周面とティース６の内周面は互いに凸形状を成しているので、回転子３の外周面とティース６の内周面間のギャップ長はサインカーブみたいに変動する。すなわち、ヨーク鉄心１０と希土類永久磁石１２と磁極鉄心１３とを合成樹脂１５でモールド成形しているが、モールド成形の合成樹脂１５にかかる剥離力は回転方向の力と遠心力と、希土類永久磁石１２とティース６間の磁気吸引力になる。力はギャップの大きさに関係しているので、サインカーブのギャップ長であれば、最小ギャップのときの力を考えればモールド成形で安定に回転子３を製作できる。この磁極鉄心１３にかかる力が弱まればモールド材の合成樹脂１５の使用量を削減できることになる。   Here, since the outer peripheral surface of the rotor 3 and the inner peripheral surface of the tooth 6 are convex with each other, the gap length between the outer peripheral surface of the rotor 3 and the inner peripheral surface of the tooth 6 varies like a sine curve. To do. That is, the yoke iron core 10, the rare earth permanent magnet 12 and the magnetic pole iron core 13 are molded with the synthetic resin 15, but the peeling force applied to the molded synthetic resin 15 is the rotational force, centrifugal force, and rare earth permanent magnet. Magnetic attraction between 12 and teeth 6 is obtained. Since the force is related to the size of the gap, if the gap length of the sine curve is considered, the rotor 3 can be stably manufactured by molding considering the force at the minimum gap. If the force applied to the magnetic core 13 is weakened, the amount of the synthetic resin 15 used as the molding material can be reduced.

ここに、回転子３の半径をＲ０、希土類永久磁石１２の内周側の回転子中心に最も近接する位置までの距離（ヨーク鉄心１０の外周側に配置された凹部１１の最小半径）をＲ１としたとき、比（Ｒ１／Ｒ０）が０.９５より大きくなるようにしている。図１および図３に示した実施の形態においては、回転子３の半径Ｒ０が１０４.０mmであり、希土類永久磁石１２の内周側の回転子中心に最も近接する位置までの距離Ｒ１が１００.２mmとしている。その結果、回転子３の半径Ｒ０と、希土類永久磁石１２の内周側の回転子中心に最も近接する位置までの距離Ｒ１の比（Ｒ１／Ｒ０）が、０.９６３となっている。また、永久磁石の上部に設けた磁極鉄心１３の磁極中心の厚みＨｂを１.９mmとし、希土類永久磁石１２の径方向厚みＨｍを１.９mmとしている。   Here, the radius of the rotor 3 is R0, and the distance to the position closest to the rotor center on the inner peripheral side of the rare earth permanent magnet 12 (the minimum radius of the recess 11 arranged on the outer peripheral side of the yoke core 10) is R1. , The ratio (R1 / R0) is made larger than 0.95. In the embodiment shown in FIGS. 1 and 3, the radius R0 of the rotor 3 is 104.0 mm, and the distance R1 to the position closest to the rotor center on the inner peripheral side of the rare earth permanent magnet 12 is 100. .2mm. As a result, the ratio (R1 / R0) of the radius R0 of the rotor 3 and the distance R1 to the position closest to the rotor center on the inner peripheral side of the rare earth permanent magnet 12 is 0.963. In addition, the thickness Hb of the magnetic pole center of the magnetic pole core 13 provided on the upper part of the permanent magnet is 1.9 mm, and the radial thickness Hm of the rare earth permanent magnet 12 is 1.9 mm.

磁極鉄心１３の磁極中心の厚みＨｂを１.９mmとしているが、この厚みＨｂは薄ければ薄いほど特性が向上する。しかし、磁極鉄心１３自体が積層電磁鋼板であり、積層するにはカシメ部を必要とする。カシメ部の最小径はΦ０.６mm程度であり、カシメ部の最小径Φ０.６mmの両再度に必要な鉄心幅を０.５mmにすると、磁極鉄心１３の厚みＨｂが１.６mm、そして中心Ｙからの円弧部分による高さの変化分が０.３mm程度となり、磁極鉄心１３の磁極中心の厚みＨｂを１.９mmとなる。この磁極鉄心１３の磁極中心の厚みＨｂはカシメ部の強度にも関係するので、製造上１.９mmや１.８mmが限界となる。   Although the thickness Hb of the magnetic pole center of the magnetic core 13 is 1.9 mm, the thinner the thickness Hb, the better the characteristics. However, the magnetic pole core 13 itself is a laminated electromagnetic steel sheet, and a caulking portion is required for lamination. The minimum diameter of the caulking part is about 0.6 mm, and if the iron core width necessary for both of the minimum diameters of the caulking part is 0.5 mm, the thickness Hb of the magnetic core 13 is 1.6 mm and the center Y The change in the height due to the arc portion from about 0.3 mm is about 0.3 mm, and the thickness Hb of the magnetic pole center of the magnetic core 13 is 1.9 mm. Since the thickness Hb of the magnetic pole center of the magnetic core 13 is also related to the strength of the caulking portion, 1.9 mm or 1.8 mm is a limit in manufacturing.

ちなみに、特開２００６−３５２９７３号公報に図示された例では、Ｒ１／Ｒ０に相当する値は０.８６程度となり、磁極鉄心１３の厚みＨｂや希土類永久磁石１２の径方向厚みＨｍが厚いと言える。   Incidentally, in the example shown in Japanese Patent Laid-Open No. 2006-352773, the value corresponding to R1 / R0 is about 0.86, and it can be said that the thickness Hb of the magnetic core 13 and the radial thickness Hm of the rare earth permanent magnet 12 are thick. .

使用する合成樹脂量を概算すると、従来例では、概略１９０８mm2で、本発明では、π（１０４2−１００.２2）／４＝６０９mm2となる。合成樹脂量の大小に関しては積厚や磁極鉄心・希土類永久磁石の断面積も関係するが、希土類永久磁石の磁束を有効利用しようと考えれば同様な形態となり、上記断面積の計算値にリンクする。 The amount of the synthetic resin to be used is roughly 1908 mm 2 in the conventional example, and in the present invention, π (104 2 -100.2 2 ) / 4 = 609 mm 2 . The amount of synthetic resin is related to the thickness and the cross-sectional area of the magnetic pole core / rare earth permanent magnet, but if you want to make effective use of the magnetic flux of the rare earth permanent magnet, it will be the same form and linked to the calculated value of the above cross-sectional area. .

すなわち、本発明によれば、従来に対し、モールド成形の合成樹脂の量を６８％（１−（６０９／１９０８）＝０.６８）削減できることとなり、環境に影響を及ぼす合成樹脂の量を削減し、リサイクル性を高めることができる。   That is, according to the present invention, the amount of molded synthetic resin can be reduced by 68% (1- (609/1908) = 0.68), and the amount of synthetic resin affecting the environment can be reduced. And recyclability can be improved.

上記において、段落し部１６の高さＨｄとティース６の内周面の最大ギャップＨｇとの比は１.４／１.５＝０.９３３となり、（Ｈｄ／Ｈｇ）＜（Ｒ１／Ｒ０）が成立する。最大ギャップＨｇが小さくなると上式は成立せず、段落し部１６の高さＨｄも関係する。   In the above, the ratio of the height Hd of the paragraph 16 and the maximum gap Hg of the inner peripheral surface of the tooth 6 is 1.4 / 1.5 = 0.933, and (Hd / Hg) <(R1 / R0) Is established. When the maximum gap Hg becomes smaller, the above equation does not hold, and the height Hd of the paragraph 16 is also related.

図４には本発明の永久磁石式回転電機を搭載した洗濯機の構成例を示す。この洗濯機５０は、筐体５１の内部にサスペンション５２を介して懸架支持される水槽５３と、この水槽５３内の内部に回転可能に配置され、洗濯物（図示せず）が投入される洗濯槽５４と、この洗濯槽５４内の底部に配置され、洗濯槽５４内の洗濯物を攪拌する回転翼５５とを有している。永久磁石式回転電機１は水槽５３の底部に固定板５６に固定され、洗濯機駆動軸５７（永久磁石式回転電機１の出力軸）の外側には中空回転軸５８が設けられている。   FIG. 4 shows a configuration example of a washing machine equipped with the permanent magnet type rotating electrical machine of the present invention. The washing machine 50 includes a water tank 53 that is suspended and supported inside a housing 51 via a suspension 52, and a laundry that is rotatably disposed inside the water tank 53 and into which laundry (not shown) is placed. It has a tank 54 and a rotary blade 55 that is disposed at the bottom of the laundry tank 54 and stirs the laundry in the laundry tank 54. The permanent magnet type rotating electrical machine 1 is fixed to a fixed plate 56 at the bottom of the water tank 53, and a hollow rotating shaft 58 is provided outside the washing machine drive shaft 57 (the output shaft of the permanent magnet type rotating electrical machine 1).

すなわち、永久磁石式回転電機１の出力軸である洗濯機駆動軸５７が回転すると、回転翼５５が回転して洗濯物を攪拌することになり、洗濯動作が行われる。また、回転翼５５が回転させず洗濯槽５４を高速に回転させると、脱水動作になる。洗濯槽５４内に温風を吹き込むことにより（図示していない）、乾燥動作に入る。   That is, when the washing machine drive shaft 57 that is the output shaft of the permanent magnet type rotating electrical machine 1 rotates, the rotating blades 55 rotate to stir the laundry, and the washing operation is performed. Further, when the washing tub 54 is rotated at a high speed without rotating the rotary blade 55, a dehydrating operation is performed. By blowing warm air into the washing tub 54 (not shown), the drying operation is started.

乾燥時間を短くなれば省エネを図ることができる。乾燥時間は洗濯物の脱水度が上がれば短くなる。脱水度を上げるためには回転電機を高速に回転させる必要がある。高速回転させるにはモールド成形した合成樹脂の強度が問題となる。そこで、本発明では磁極鉄心１３の磁極中心の厚みＨｂと希土類永久磁石１２の厚みＨｍとをＨｓの４倍以下となるようにしているので、合成樹脂にかかる遠心力を小さくして高速回転できる回転電機が提供できる。   Energy saving can be achieved if the drying time is shortened. The drying time becomes shorter as the degree of dehydration of the laundry increases. In order to increase the degree of dehydration, it is necessary to rotate the rotating electrical machine at high speed. In order to rotate at high speed, the strength of the molded synthetic resin becomes a problem. Therefore, in the present invention, the thickness Hb of the magnetic pole center of the magnetic core 13 and the thickness Hm of the rare earth permanent magnet 12 are set to be not more than 4 times Hs, so that the centrifugal force applied to the synthetic resin can be reduced to rotate at high speed. A rotating electrical machine can be provided.

以上の構成によれば、回転子３の半径をＲ０、希土類永久磁石１２の内周側の回転子中心に最も近接する位置までの距離をＲ１としたとき、比（Ｒ１／Ｒ０）が０.９５より大きくなるようにし、磁極鉄心１３の磁極中心の厚みＨｂと希土類永久磁石１２の厚みＨｍとを磁極鉄心１３の磁石係止部の厚みＨｓの４倍以下となるようにしているので、モールド成形の合成樹脂の量を軽減して、高速回転を可能にしリサイクル性を高めることができる洗濯機を提供できる。   According to the above configuration, when the radius of the rotor 3 is R0 and the distance to the position closest to the rotor center on the inner peripheral side of the rare earth permanent magnet 12 is R1, the ratio (R1 / R0) is 0. 95, and the thickness Hb of the magnetic pole center of the magnetic pole core 13 and the thickness Hm of the rare earth permanent magnet 12 are set to be not more than four times the thickness Hs of the magnet engaging portion of the magnetic pole iron core 13. It is possible to provide a washing machine that can reduce the amount of molded synthetic resin, enable high-speed rotation, and improve recyclability.

本発明による永久磁石式回転電機の径方向断面図。The radial direction sectional view of the permanent magnet type rotating electrical machine by the present invention. 図１の永久磁石式回転電機の固定子の拡大図。The enlarged view of the stator of the permanent-magnet-type rotary electric machine of FIG. 図１の永久磁石式回転電機の回転子の拡大図。The enlarged view of the rotor of the permanent magnet type rotary electric machine of FIG. 本発明の永久磁石式回転電機を搭載した洗濯機の構成例。The structural example of the washing machine carrying the permanent magnet type rotary electric machine of this invention.

符号の説明Explanation of symbols

１ 永久磁石式回転電機
２ 固定子
３ 回転子
４ 固定子鉄心
５ スロット
６ ティース
７ 電機子巻線
８ スロット開口部
９ 固定子の磁極鉄心
１０ ヨーク鉄心
１１ ヨーク鉄心１０の外周側に配置された凹部
１２ 希土類永久磁石
１３ 回転子の磁極鉄心
１４ 磁石係止部
１５ 合成樹脂
１６ 段落し部
５０ 洗濯機
５１ 筐体
５２ サスペンション
５３ 水槽
５４ 洗濯槽
５５ 回転翼
５６ 固定板
５７ 洗濯機駆動軸
５８ 中空回転軸 DESCRIPTION OF SYMBOLS 1 Permanent magnet type rotary electric machine 2 Stator 3 Rotor 4 Stator iron core 5 Slot 6 Teeth 7 Armature winding 8 Slot opening 9 Stator magnetic pole core 10 Yoke iron core 11 Recessed part arranged on the outer peripheral side of the yoke iron core 10 12 Rare Earth Permanent Magnet 13 Rotor Magnetic Core 14 Magnet Locking Section 15 Synthetic Resin 16 Paragraph 50 Washing Machine 51 Housing 52 Suspension 53 Water Tank 54 Washing Tank 55 Rotor Blade 56 Fixed Plate 57 Washing Machine Drive Shaft 58 Hollow Rotating Shaft

Claims (5)

洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、該永久磁石の上部を磁極鉄心で覆った回転子が、該固定子の内周に所定のギャップを介して回転自在に支承され、該磁極鉄心と該永久磁石と該ヨーク鉄心とを合成樹脂にてモールド成形すると共に、該磁極鉄心と該ヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有する該ティースの内周面と該磁極鉄心の外周面が互いに凸形状を有していることを特徴とする洗濯機用永久磁石式回転電機。   Used in washing machines, having a stator with concentrated winding armature windings that surround teeth in a plurality of slots formed in the stator core, and formed on the outer periphery of the yoke core A rotor in which a permanent magnet is housed in a plurality of recessed portions and the upper portion of the permanent magnet is covered with a magnetic pole core is rotatably supported on the inner periphery of the stator via a predetermined gap. The permanent magnet and the yoke iron core are molded with a synthetic resin, and the magnetic pole iron core and the yoke iron core are not mechanically coupled, and the teeth having an arc surface different from the arc surface from the rotor center A permanent magnet rotating electrical machine for a washing machine, wherein an inner peripheral surface and an outer peripheral surface of the magnetic pole core have a convex shape. 洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、該永久磁石の上部を磁極鉄心で覆った回転子が、該固定子の内周に所定のギャップを介して回転自在に支承され、該磁極鉄心と該永久磁石と該ヨーク鉄心とを合成樹脂にてモールド成形すると共に、該磁極鉄心と該ヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有する該ティースの内周面と該磁極鉄心の外周面が互いに凸形状を有し、前記回転子の半径をＲ０、該永久磁石の内周面の該回転子中心に最も近接する位置までの距離をＲ１とし、該磁極鉄心の段落し部の高さをＨｄ、該回転子半径Ｒ０から最も離れた該ティースの内周面との距離をＨｇとしたとき、（Ｈｇ／Ｈｄ）＜（Ｒ１／Ｒ０）となるようにしたことを特徴とする洗濯機用永久磁石式回転電機。   Used in washing machines, having a stator with concentrated winding armature windings that surround teeth in a plurality of slots formed in the stator core, and formed on the outer periphery of the yoke core A rotor in which a permanent magnet is housed in a plurality of recessed portions and an upper portion of the permanent magnet is covered with a magnetic pole core is rotatably supported on the inner periphery of the stator via a predetermined gap. The permanent magnet and the yoke iron core are molded with a synthetic resin, and the magnetic pole iron core and the yoke iron core are not mechanically coupled, and the teeth having an arc surface different from the arc surface from the rotor center The inner peripheral surface and the outer peripheral surface of the magnetic core have a convex shape, the radius of the rotor is R0, and the distance from the inner peripheral surface of the permanent magnet to the position closest to the rotor center is R1. The height of the stepped portion of the magnetic core is Hd, and the rotor half When the distance between the farthest inner peripheral surface of the tooth from the R0 was Hg, (Hg / Hd) <(R1 / R0) and so as the permanent magnet type rotating electric machine for a washing machine, characterized in that the. 洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、該永久磁石の上部を磁極鉄心で覆った回転子が、該固定子の内周に所定のギャップを介して回転自在に支承され、該磁極鉄心と該永久磁石と該ヨーク鉄心とを合成樹脂にてモールド成形すると共に、該磁極鉄心と該ヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有する該ティースの内周面と該磁極鉄心の外周面が互いに凸形状を有し、前記磁極鉄心の最大厚みを約１.９mm以下にしたことを特徴とする洗濯機用永久磁石式回転電機。   Used in washing machines, having a stator with concentrated winding armature windings that surround teeth in a plurality of slots formed in the stator core, and formed on the outer periphery of the yoke core A rotor in which a permanent magnet is housed in a plurality of recessed portions and an upper portion of the permanent magnet is covered with a magnetic pole core is rotatably supported on the inner periphery of the stator via a predetermined gap. The permanent magnet and the yoke iron core are molded with a synthetic resin, and the magnetic pole iron core and the yoke iron core are not mechanically coupled, and the teeth having an arc surface different from the arc surface from the rotor center A permanent magnet type rotating electrical machine for a washing machine, characterized in that an inner peripheral surface and an outer peripheral surface of the magnetic pole core have a convex shape, and the maximum thickness of the magnetic core is about 1.9 mm or less. 洗濯機に用いられるものであって、固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、該永久磁石の上部を磁極鉄心で覆った回転子が、該固定子の内周に所定のギャップを介して回転自在に支承され、該磁極鉄心と該永久磁石と該ヨーク鉄心とを合成樹脂にてモールド成形すると共に、該磁極鉄心と該ヨーク鉄心とが機械的に結合せず、回転子中心からの円弧面と異なる円弧面を有する該ティースの内周面と該磁極鉄心の外周面が互いに凸形状を有し、前記磁極鉄心の最大厚みを約１.９mm以下にし、前記回転子の半径をＲ０、該永久磁石の内周面の該回転子中心に最も近接する位置までの距離をＲ１としたとき、比（Ｒ１／Ｒ０）＞０.９５となるようにしたことをたことを特徴とする洗濯機用永久磁石式回転電機。   Used in washing machines, having a stator with concentrated winding armature windings that surround teeth in a plurality of slots formed in the stator core, and formed on the outer periphery of the yoke core A rotor in which a permanent magnet is housed in a plurality of recessed portions and an upper portion of the permanent magnet is covered with a magnetic pole core is rotatably supported on the inner periphery of the stator via a predetermined gap. The permanent magnet and the yoke iron core are molded with a synthetic resin, and the magnetic pole iron core and the yoke iron core are not mechanically coupled, and the teeth having an arc surface different from the arc surface from the rotor center The inner peripheral surface and the outer peripheral surface of the magnetic core have a convex shape, the maximum thickness of the magnetic core is about 1.9 mm or less, the radius of the rotor is R0, and the rotation of the inner peripheral surface of the permanent magnet When the distance to the position closest to the child center is R1, , The ratio (R1 / R0)> 0.95 and made as a permanent magnet electric motor for a washing machine, characterized in that the that the. 固定子鉄心に形成された複数のスロット内にティースを取り囲むように集中巻の電機子巻線が施された固定子を有し、ヨーク鉄心の外周に形成された複数の凹部に永久磁石が納められ、該永久磁石の上部を磁極鉄心で覆った回転子が、該固定子の内周に所定のギャップを介して回転自在に支承され、該磁極鉄心と該永久磁石と該ヨーク鉄心とを合成樹脂にてモールド成形すると共に、該ティースの内周面と該磁極鉄心の外周面が互いに凸形状を有していることを特徴とする永久磁石式回転電機。   It has a stator with concentrated winding armature windings that surround teeth in a plurality of slots formed in the stator core, and permanent magnets are housed in a plurality of recesses formed on the outer periphery of the yoke core A rotor having the upper part of the permanent magnet covered with a magnetic pole core is rotatably supported through a predetermined gap on the inner periphery of the stator, and the magnetic pole core, the permanent magnet, and the yoke iron core are synthesized. A permanent magnet type rotating electrical machine characterized by being molded with a resin and having an inner peripheral surface of the teeth and an outer peripheral surface of the magnetic pole core having convex shapes.
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CN102738924B (en) * 2011-03-31 2015-07-08 日立空调·家用电器株式会社 Rotor, magnet motor and washing machine

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