JP2004096874A

JP2004096874A - Flat f permanent magnet dynano electric machine

Info

Publication number: JP2004096874A
Application number: JP2002253458A
Authority: JP
Inventors: Yoshitaka Azuma; 東　義高
Original assignee: Meidensha Corp; Meidensha Electric Manufacturing Co Ltd
Current assignee: Meidensha Corp; Meidensha Electric Manufacturing Co Ltd
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2004-03-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat permanent magnet dynamo electric machine capable of eliminating use of a non-magnetic frame. <P>SOLUTION: A stator 22 is constituted by a base 24 for fixing a stator core 25, the stator core 25 having a yoke 28 around which a winding 27 is vertically wound through a bobbin 26, first teeth 30A on an outer side of the yoke, and second teeth 30B on an inner side. A rotor 23 includes a rotor core 35 in which an outer rotor 32 and an inner rotor 33 are protruded to a base 34, A first permanent magnet 36 is disposed at the outer rotor, and a second permanent magnet 37 is disposed at the inner rotor so that the identical pole may face the first permanent magnet to constitute an outer rotor/inner rotor compound type machine. The stator core is divided by the yoke, and the winding is covered with an insulation sheet or a cover part of the bobbin. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は扁平形で永久磁石式のモータ又は発電機である扁平形永久磁石式回転電機に関する。
【０００２】
【従来の技術】
図２４は従来の扁平形永久磁石式モータの横断面図、図２５は前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図、図２６は図２４のＡ部拡大図である。
【０００３】
現在、図２４，図２５及び図２６に示すようにティース部１０で分割された固定子鉄心１１に縦巻きに巻線１３を巻くことにより、集中巻きでも正数巻線が可能な環状巻線を備えた扁平形永久磁石式モータ１が実用化されている。
【０００４】
詳述すると、図示した従来の扁平形永久磁石式モータ１は固定子２の内側に回転子３が設けられたインナーロータ形のものである。回転子３は非磁性フレーム４に軸受５を介して回転可能に支持された回転軸６と、回転軸６に固定された回転子鉄心７と、回転子鉄心７の外周面に鉄心周方向に配設された複数の永久磁石８とを備えた構成となっている。なお、図示例は４極の場合であり、４つの永久磁石８が設けられている。
【０００５】
一方、固定子２は固定子鉄心１１と、絶縁用のボビン１２と、巻線１３とを備えている。固定子鉄心１１はヨーク部９と、永久磁石８に対向するティース部１０とを有し、このティース部１０において鉄心周方向に分割されており、これらの各鉄心分割部ごとにボルト１４によって非磁性フレーム４の内側面に固定されている。ボビン１２は軸方向（回転軸の軸方向）に２分割されており、軸方向の両側からヨーク部９に装着されている。巻線１３はボビン１２を介してヨーク部９に縦巻きに巻かれている。
【０００６】
【発明が解決しようとする課題】
上記従来の扁平形永久磁石式モータ１は次のような問題点を有している。
【０００７】
（１）　図２７に矢印で磁束の状態を示すように従来の環状巻線を備えた扁平形永久磁石式モータ１では、一般的なモータに比べ、Ｂ点（図２４のＢ点参照）から漏れる磁束が存在し、この漏れ磁束を小さくするために非磁性のフレーム４が必要となる。
（２）　図２６に示すように隣り合うティース部１０の間のスロット１５に絶縁材が無くて対地絶縁が弱いことから、ティース部１０と巻線１３との絶縁距離を保つために巻線１３は比較的少なく巻かれており、巻線占積率が悪くなっている。
（３）　固定子鉄心１１がティース部１０で分割されているため、固定子鉄心１１（各鉄心分割部）の取り付けが困難である。
【０００８】
従って本発明は上記の事情に鑑み、非磁性フレームを不要にし、スロット内の巻線占積率を高め、固定子鉄心の取り付けを容易にすることなどが可能な扁平形永久磁石式モータなどの扁平形永久磁石式回転電機を提供することを課題とする。
【０００９】
【課題を解決するための手段】
上記課題を解決する第１発明の扁平形永久磁石式回転電機は、固定子と回転子とを有し、
前記固定子は、絶縁材を介して巻線が縦巻きに巻かれたヨーク部と、前記ヨーク部のアウター側に設けた第１ティース部と、前記ヨーク部のインナー側に設けた第２ティース部とを有する構造の固定子鉄心と、この固定子鉄心を固定する板状のベースとを備えた構成とし、
前記回転子は、前記固定子鉄心のアウター側に位置するアウターロータ部と、前記固定子鉄心のインナー側に位置するインナーロータ部とを円板状のベース部の側面に突設した構造の回転子鉄心を有し、且つ、前記アウターロータ部には複数の第１永久磁石を鉄心周方向に配設し、前記インナーロータ部には複数の第２永久磁石を前記第１永久磁石に対して同じ極が向き合うように鉄心周方向に配設してなるアウターロータ・インナーロータ複合形の構成としたことを特徴とする。
【００１０】
また、第２発明の扁平形永久磁石式回転電機は、第１発明の扁平形永久磁石式回転電機において、
対向している前記第１永久磁石と前記第２永久磁石の磁極位置を鉄心周方向にずらしたことを特徴とする。
【００１１】
また、第３発明の扁平形永久磁石式回転電機は、第１発明の扁平形永久磁石式回転電機において、
前記アウターロータ部では前記第１永久磁石を設けた極の次の極には前記第１永久磁石に代えて第１鉄ピースを設け、前記第１鉄ピースを設けた極の次の極には前記第１永久磁石を設けることにより、前記第１永久磁石と前記第１鉄ピースとを前記アウターロータ部の内周面に鉄心周方向に交互に配設し、
前記インナーロータ部では前記第２永久磁石を設けた極の次の極には前記第２永久磁石に代えて第２鉄ピースを設け、前記第２鉄ピースを設けた極の次の極には前記第２永久磁石を設けることにより、前記第２永久磁石と前記第２鉄ピースとを前記インナーロータ部の外周面に鉄心周方向に交互に配設したことを特徴とする。
【００１２】
また、第４発明の扁平形永久磁石式回転電機は、第１発明の扁平形永久磁石式回転電機において、
前記インナーロータ部では、前記第２永久磁石を鉄心内部に埋め込んだことを特徴とする。
【００１３】
また、第５発明の扁平形永久磁石式回転電機は、第４発明の扁平形永久磁石式回転電機において、
前記アウターロータ部では前記第１永久磁石を設けた極の次の極には前記第１永久磁石に代えて鉄ピースを設け、前記鉄ピースを設けた極の次の極には前記第１永久磁石を設けることにより、前記第１永久磁石と前記鉄ピースとを前記アウターロータ部の内周面に鉄心周方向に交互に配設し、
前記インナーロータ部では前記第２永久磁石を設けた極の次の極は前記第２永久磁石も磁石埋め込み穴も設けない鉄心だけの部分とし、この鉄心だけの部分の極の次の極は前記第２永久磁石を設けることにより、前記第２永久磁石を埋め込んだ部分と前記鉄心だけの部分とが鉄心周方向に交互に存在する構造としたことを特徴とする。
【００１４】
また、第６発明の扁平形永久磁石式回転電機は、第１乃至第５発明の何れか１つの扁平形永久磁石式回転電機において、
前記固定子鉄心は鉄心周方向に前記ヨーク部で分割し、この分割したヨーク部のそれぞれに前記絶縁材を設けたことを特徴とする。
【００１５】
また、第７発明の扁平形永久磁石式回転電機は、第６発明の扁平形永久磁石式回転電機において、
前記絶縁材は筒状部と、この筒状部の両端に突設した鍔部とを有する構造のボビンであり、このボビンのティース側の鍔部を鉄心径方向の外側又は内側に延長して同鍔部が前記第１ティース部又は前記第２ティース部の内面に設けた凹部に嵌合するように構成したことを特徴とする。
【００１６】
また、第８発明の扁平形永久磁石式回転電機は、第１乃至第７発明の何れか１つの扁平形永久磁石式回転電機において、
前記巻線に前記巻線を覆うようにして帯状の絶縁材を巻き付けたことを特徴とする。
【００１７】
また、第９発明の扁平形永久磁石式回転電機は、第６発明の扁平形永久磁石式回転電機において、
前記絶縁材は筒状部と、この筒状部の両端に突設した鍔部とを有する構造のボビンであり、このボビンの片側の鍔部にはこの鍔部と一体に蓋部を設け、この蓋部によって前記巻線のアウター側の面とインナー側の面とを覆うようにしたことを特徴とする。
【００１８】
また、第１０発明の扁平形永久磁石式回転電機は、第６乃至第９発明の何れか１つの扁平形永久磁石式回転電機において、
鉄心周方向に分割した前記ヨーク部の一方の分割面に凸部を形成し他方の分割面に凹部を形成して、これらの凸部と凹部とが嵌合することにより前記ヨーク部の分割部分のずれを防止するように構成としたことを特徴とする。
【００１９】
また、第１１発明の扁平形永久磁石式回転電機は、第７乃至第１０発明の何れか１つの扁平形永久磁石式回転電機において、
前記ボビンの反ティース側の鍔部に鉄心周方向に突設したボビン突起部を備え、このボビン突起部同士が当接することによって前記ボビンの鉄心周方向のずれを防止するように構成したことを特徴とする。
【００２０】
また、第１２発明の扁平形永久磁石式回転電機は、第６乃至第９発明の何れか１つの扁平形永久磁石式回転電機において、
鉄心周方向に分割した前記ヨーク部の分割部分に同分割部分に引っ掛かる引っ掛かり部を両端に形成したコ字状のヨーク結合部材を嵌めることにより、前記ヨーク部の分割部分のずれを防止するように構成したことを特徴とする。
【００２１】
また、第１３発明の扁平形永久磁石式回転電機は、第１乃至第１２発明の何れか１つの扁平形永久磁石式回転電機において、
前記回転子鉄心は、前記アウターロータ部側の回転子鉄心と前記インナーロータ部側の回転子鉄心とに分割したことを特徴とする。
【００２２】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づき詳細に説明する。
【００２３】
＜実施の形態１＞
図１は本発明の実施の形態１に係る扁平形永久磁石式モータの横断面図、図２は前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図、図３は図１のＣ部拡大斜視図、図４は前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【００２４】
図１、図２及び図３に示すように、本実施の形態１の扁平形永久磁石式モータ２１は固定子２２と回転子２３とを有している。
【００２５】
固定子２２はベース２４と、固定子鉄心２５と、絶縁用のボビン２６と、巻線２７とを有している。ベース２４は円板状のものであり、内側面２４ａには固定子鉄心２５を取り付けるための突起部２４ｂが形成されている。また、ベース側面２４ａの中央部には、軸受２９を介して回転子２３を回転可能に支持するための突起部２４ｃが形成されている。なお、ベース２４は必ずしも円板状のものに限らず例えば矩形板状のものであってもよい。
【００２６】
固定子鉄心２５はヨーク部２８と第１ティース部３０Ａと第２ティース部３０Ｂとを有している。ヨーク部２８は鉄心周方向に延びており、隣合うティース部（第１及び第２ティース部３０Ａ，３０Ｂ）の間にそれぞれ位置している。そして、ヨーク部２８のアウター側（ヨーク部よりも鉄心径方向の外側）に第１ティース部３０が設けられ、ヨーク部２８のインナー側（ヨーク部よりも鉄心径方向の内側）に第２ティース部３０Ｂが設けられており、ティース部全体はエの字状となっている。また、固定子鉄心２５はティース部（第１及び第２ティース部３０Ａ，３０）において鉄心周方向に分割されている。ティース部で分割された各鉄心分割部はそれぞれボルト３１によってベース２４の側面２４ａの突起部２４ｂに固定されている。
【００２７】
ボビン２６は樹脂などの絶縁性材料で形成されたものであり、筒状部２６ａと、筒状部２６ａの両端に突設した鍔部２６ｂとを有する構造となっている。また、ボビン２６は従来と同様に軸方向（回転軸の軸方向）に２分割されており、軸方向の両側からヨーク部２８に装着されている。巻線２７はボビン２６を介してヨーク部２８に縦巻きに巻かれた環状巻線である。即ち、巻線２７に通電したとき、巻線２７の中心部（ヨーク部２８）では鉄心周方向の磁束が生じるようになっている。
【００２８】
一方、回転子２３はアウターロータ・インナーロータ複合形の構成となっている。
【００２９】
詳述すると、回転子鉄心３５はアウターロータ部３２とインナーロータ部３３とを、円板状のベース部３４の内側面３４ａに突設した構造となっている。そして、アウターロータ部３２は固定子鉄心２５のアウター側（鉄心径方向の外側）に位置し、内周面３２ａには複数の第１永久磁石３６が接着剤で接着されて鉄心周方向に配設されている。これらの第１永久磁石３６は固定子鉄心２５の第１ティース部３０Ａにギャップを隔てて対向している。インナーロータ部３３は固定子鉄心２５のインナー側（鉄心径方向の内側）に位置し、内周面３３ｂ側が軸受２９を介してベース２４の突起部２４ｃに回転可能に支持され、外周面３３ａには複数の第２永久磁石３７が接着剤で接着されて鉄心周方向に配設されている。これらの第２永久磁石３７は固定子鉄心２５の第２ティース部３０Ｂにギャップを隔てて対向している。
【００３０】
また、第２永久磁石３７は第１永久磁石３６に対して同じ極が向き合うように配設されている。つまり、第１永久磁石３６の内面側の磁極がＮ極の場合には、当該第１永久磁石３６に対向する第１永久磁石３７は外面側の磁極をＮ極とし、第１永久磁石３６の内面側の磁極がＳ極の場合には、当該第１永久磁石３６に対向する第１永久磁石３７は外面側の磁極をＳ極としている。なお、図示例は４極の場合であり、第１永久磁石３６と第２永久磁石３７はそれぞれ４個づつ設けられている。
【００３１】
本実施の形態１の扁平形永久磁石式モータ２１によれば、図４に示すように磁束がアウターロータ部３２側とインナーロータ部３３側とに作用して、アウターロータ部３２側とインナーロータ部３３側とにトルクが発生することになる。そして、本実施の形態１の扁平形永久磁石式モータ２１では、ギャップ面積が大きく、また、漏れ磁束が小さいため、特性のよいモータとなる。また、従来の環状巻線とは違い、非磁性フレームが不要である。
【００３２】
＜実施の形態２＞
図示は省略するが、本発明の実施の形態２の扁平形永久磁石式モータでは、図１〜図３に示す扁平形永久磁石式モータ２１において、対向している第１永久磁石３６と第２永久磁石３７の磁極位置（鉄心周方向の取り付け位置）を鉄心周方向にずらす。
【００３３】
その他の構成については上記実施の形態１と同様であり、ここでの説明は省略する。
【００３４】
本実施の形態２の扁平形永久磁石式モータ１によれば、対向している第１永久磁石３６と第２永久磁石３７の磁極位置を鉄心周方向にずらしたことにより、トルクリプルが低減し、より特性のよいモータとなる。
【００３５】
＜実施の形態３＞
図５は本発明の実施の形態３に係る扁平形永久磁石式モータの横断面図、図６は前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【００３６】
図５に示すように本実施の形態３の扁平形永久磁石式モータ２１では、アウターロータ部３２の内周面３２ａには第１永久磁石３６と、珪素鋼板を積層してなる第１鉄ピース４１とが、鉄心周方向に交互に配設され、インナーロータ部３３の外周面３３ａには第２永久磁石３７と、珪素鋼板を積層してなる第２鉄ピース４２とが、鉄心周方向に交互に配設されている。
【００３７】
即ち、上記実施の形態１の扁平形永久磁石式モータ２１に対し、本実施の形態３の扁平形永久磁石式モータ２１においては、アウターロータ部３２では第１永久磁石３６を設けた極の次の極に第１永久磁石３６に代えて第１鉄ピース４１を設け、第１鉄ピース４１を設けた極の次の極に第１永久磁石３６を設けることにより、第１永久磁石３６と第１鉄ピース４１とをアウターロータ部３２の内周面３２ａに鉄心周方向に交互に配設し、また、インナーロータ部３３では第２永久磁石３７を設けた極の次の極に第２永久磁石３７に代えて第２鉄ピース４２を設け、第２鉄ピース４２を設けた極の次の極に第２永久磁石４７を設けることにより、第２永久磁石３７と第２鉄ピース４２とをインナーロータ部３３の外周面３３ａに鉄心周方向に交互に配設した構成となっている。
【００３８】
また、図示例では第１永久磁石３６と第２永久磁石３７とが対向し、第１鉄ピース４１と第２鉄ピース４２とが対向している。なお、必ずしもこれに限定するものではなく、第１永久磁石３６と第２鉄ピース４２とが対向し、第１鉄ピース４１と第２永久磁石３７とが対向するようにしてもよい。
【００３９】
その他の構成については上記実施の形態１と同様であり、ここでの説明は省略する。本実施の形態３の扁平形永久磁石式モータ２１における磁束の状態は図６に示すようになり、上記実施の形態１の場合（図４参照）と同様である。
【００４０】
そして、本実施の形態３の扁平形永久磁石式モータ２１によれば、第１及び第２永久磁石３６，３７の一部を第１及び第２鉄ピース４１，４２に代えたことにより、第１及び第２永久磁石３６，３７の数（磁石量）を減らすことができる。
【００４１】
＜実施の形態４＞
図７は本発明の実施の形態４に係る扁平形永久磁石式モータの横断面図、図８は前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図である。
【００４２】
図７及び図８に示すように、本実施の形態４の扁平形永久磁石式モータ２１では、インナーロータ部３３側の第２永久磁石３７が鉄心内部に埋め込まれた構成となっている。詳述すると、回転子鉄心３５のインナーロータ部３３には更に珪素鋼板を積層してなる鉄心部４３を設けられており、この鉄心部４３に形成された４つの磁石埋め込み穴４３ａに４つ第２永久磁石３７がそれぞれ埋め込まれている。
【００４３】
その他の構成については上記実施の形態１と同様であり、ここでの説明は省略する。
【００４４】
本実施の形態４の扁平形永久磁石式モータ２１によれば、インナーロータ部３３の第２永久磁石３７を鉄心内部に埋め込んだため、高速回転が可能となる。
【００４５】
＜実施の形態５＞
図９は本発明の実施の形態５に係る扁平形永久磁石式モータの横断面図、図１０は前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【００４６】
図９に示すように本実施の形態５の扁平形永久磁石式モータ２１では、アウターロータ部３２の内周面３２ａには第１永久磁石３６と、珪素鋼板を積層してなる鉄ピース４４とが、鉄心周方向に交互に配設され、インナーロータ部３３には第２永久磁石３７を埋め込んだ部分と、第２永久磁石も磁石埋め込み穴も設けない鉄心だけの部分４５とが鉄心周方向に交互に存在する構成となっている。
【００４７】
即ち、上記実施の形態１の扁平形永久磁石式モータ２１に対し、本実施の形態５の扁平形永久磁石式モータ２１においては、アウターロータ部３２では第１永久磁石３６を設けた極の次の極に第１永久磁石３６に代えて鉄ピース４４を設け、鉄ピース４４を設けた極の次の極に第１永久磁石３６を設けることにより、第１永久磁石３６と鉄ピース４４とをアウターロータ部３２の内周面３２ａに鉄心周方向に交互に配設し、また、インナーロータ部３３では第２永久磁石３７を設けた極の次の極を第２永久磁石も磁石埋め込み穴も設けない鉄心だけの部分４５とし、この鉄心だけの部分４５の極の次の極に第２永久磁石３７を設けることにより、第２永久磁石３７を埋め込んだ部分と鉄心だけの部分４５とが鉄心周方向に交互に存在する構造となっている。
【００４８】
また、図示例では第１永久磁石３６と第２永久磁石３７とが対向し、鉄ピース４４と鉄心だけの部分４５とが対向している。なお、必ずしもこれに限定するものではなく、第１永久磁石３６と鉄心だけの部分４５とが対向し、鉄ピース４４と第２永久磁石３７とが対向するようにしてもよい。
【００４９】
その他の構成については上記実施の形態４と同様であり、ここでの説明は省略する。本実施の形態５の扁平形永久磁石式モータ２１における磁束の状態は図１０に示すようになり、上記実施の形態１の場合（図４参照）と同様である。
【００５０】
そして、本実施の形態５の扁平形永久磁石式モータ２１によれば、第１永久磁石３６の一部を鉄ピース４４に代え、第２永久磁石３７の一部を鉄心だけの部分４５に代えたことにより、第１及び第２永久磁石３６，３７の数（磁石量）を減らすことができる。
【００５１】
＜実施の形態６＞
図１１は本発明の実施の形態６に係る扁平形永久磁石式モータの横断面図、図１２は図１１のＤ部拡大断面図である。なお、図１２ではヨーク部の分割面を離した状態で図示している。また、図１３は前記扁平形永久磁石式モータに備えたボビンの斜視図である。
【００５２】
図１１及び図１２に示すように、本実施の形態６の扁平形永久磁石式モータ２１では、固定子鉄心２５がヨーク部２８で鉄心周方向に分割されている。また、この分割されたヨーク部２８のそれぞれに絶縁用のボビン４６が装着されている。即ち、隣り合うティース部（第１及び第２ティース部３０Ａ，３０Ｂ）の間の各スロットにそれぞれ２つのボビン４６が設けられている。ヨーク部２８で分割された各鉄心分割部は、それぞれボルト３１によってベース２４の側面２４ａの突起部２４ｂに固定されている。巻線２７は分割されたヨーク部２８のそれぞれにボビン４６を介して縦巻きに巻かれている。
【００５３】
ボビン４６は樹脂などの絶縁性材料で形成されたものであり、図１３などに示すように筒状部４６ａと、筒状部４６ａの両端に突設した鍔部４６ｂとを有する構造となっている。この場合、ボビン４６は、分割されたヨーク部２８のそれぞれを、軸方向からボビン４６の筒状部４６ａに挿通するようにして装着される。
【００５４】
その他の構成については上記実施の形態１と同様であり、ここでの説明は省略する。
【００５５】
本実施の形態６の扁平形永久磁石式モータ２１によれば、固定子鉄心２５をティース部（第１及び第２ティース部３０Ａ，３０Ｂ）で分割するのではなく、ヨーク部２８で分割しているため、ベース２４への固定子鉄心２５（各鉄心分割部）の固定が簡単である。
【００５６】
＜実施の形態７＞
図１４は本発明の実施の形態７に係る扁平形永久磁石式モータの要部構成図であり、図１２と同様にヨーク部の分割面を離した状態で図示している。
【００５７】
図１４に示すように、本実施の形態７の扁平形永久磁石式モータ２１では、ボビン４６のティース側の鍔部４６ｂが、鉄心径方向の外側に延長されて、第１ティース部３０Ａの内面３０Ａ−１に設けられた凹部３０Ａ−１に嵌合されている。なお、この場合、ボビン４６をヨーク部２８に装着（挿通）する際には鍔部４６ｂの延長部分が撓む必要があるため、ボビン４６は樹脂などの可撓性を有する材料で形成する。
【００５８】
その他の構成については上記実施の形態６と同様であり、ここでの説明は省略する。
【００５９】
本実施の形態７の扁平形永久磁石式モータ２１によれば、ボビン４６の鍔部４６ｂを延長して第１ティース部３０Ａの凹部３０Ａ−２に嵌合させることにより、ボビン４６を簡単に仮止めすることができ、ボビン４６が抜けるのを防止することができる。なお、図示は省略するが、ボビン４６の鍔部４６ｂを、鉄心径方向の内側に延長して、第２ティース部３０Ｂの内面３０Ｂ−１に形成した凹部に嵌合するようにしてもよい。
【００６０】
＜実施の形態８＞
図１５は本発明の実施の形態８に係る扁平形永久磁石式モータの要部構成図、図１６（ａ）は前記扁平形永久磁石式モータの巻線に絶縁紙を巻き付ける前の状態を示す斜視図、図１６（ｂ）は前記巻線に絶縁紙を巻き付けた状態を示す斜視図である。
【００６１】
図１５及び図１６に示すように、本実施の形態８の扁平形永久磁石式モータ２１では、帯状の絶縁材としての絶縁紙４７が、巻線２７を覆うようにして巻線２７に巻き付けられている。なお、巻線２７に巻き付けられた絶縁紙４７の端部４７ａは、絶縁テープ４８によって止められている。
【００６２】
その他の構成については上記実施の形態６と同様であり、ここでの説明は省略する。
【００６３】
本実施の形態８の扁平形永久磁石式モータ２１によれば、巻線２７に絶縁紙４７を巻き付けることにより、対地絶縁が向上する。このため、隣り合う第１ティース部３０Ａの間のスロット５１内や、隣り合う第２ティース部３０Ｂの間のスロット５２内における巻線占積率を高めることができる。
【００６４】
＜実施の形態９＞
図１７は本発明の実施の形態９に係る扁平形永久磁石式モータの要部構成図、図１８（ａ）は前記扁平形永久磁石式モータのボビンの蓋を閉じる前の状態を示す斜視図、図１８（ｂ）は前記ボビンの蓋を閉じた状態を示す斜視図である。
【００６５】
図１７及び図１８に示すように、本実施の形態９の扁平形永久磁石式モータ２１では、ボビン４６の片側の鍔部４６ｂに同鍔部４６ｂと一体に蓋部４６ｃが設けられている。蓋部４６ｃは、蓋部４６ｃと鍔部４６ｂとの間の部分４６ｄを切り欠くことなどによって薄くすることにより、容易に起伏（開閉）することができるようになっている。そして、ボビン４６をヨーク部２８に装着するときには、ボビン４６の筒状部４６ａに巻線２７を縦巻きに巻いた後、ボビン４６をヨーク部２７に嵌め込む（挿通する）が、このときに蓋部４６ｃは図１８（ａ）に矢印Ｅで示すように倒すことにより図１８（ｂ）のように（閉じた）状態とし、この蓋部４６ｃによって巻線２７のアウター側の面２７ａとインナー側の面２７ｂとを覆う。なお、この場合、ボビン４６は樹脂で成形することが望ましい。
【００６６】
その他の構成については上記実施の形態６と同様であり、ここでの説明は省略する。
【００６７】
本実施の形態９の扁平形永久磁石式モータ２１によれば、ボビン４６の蓋部４６ｃによって巻線２７のアウター側の面２７ａとインナー側の面２７ｂとを覆うことにより、対地絶縁が向上する。このため、隣り合う第１ティース部３０Ａの間のスロット５１内や、隣り合う第２ティース部３０Ｂの間のスロット５２内における巻線占積率を高めることができる。
【００６８】
＜実施の形態１０＞
図１９は本発明の実施の形態１０に係る扁平形永久磁石式モータの要部構成図であり、図１９（ａ）にはヨーク部の分割面を離した状態で図示し、図１９（ｂ）にはヨーク部の分離面を当接させた状態で図示している。
【００６９】
図１９に示すように、本実施の形態１０の扁平形永久磁石式モータ２１では、鉄心周方向に分割されたヨーク部２８の一方の分割面２８ａに凸部２８ｂが形成され、他方の分割面２８ａに凹部２８ｃが形成されており、これらの凸部２８ｂと凹部２８ｃとが嵌合することによってヨーク部２８の分割部分のずれを防止するように構成されている。
【００７０】
その他の構成については上記実施の形態６と同様であり、ここでの説明は省略する。
【００７１】
本実施の形態１０の扁平形永久磁石式モータ２１によれば、分割面２８ａの凸部２８ｂと凹部２８ｃとが嵌合することによってヨーク部２８の分割部分のずれを確実に防止することができる。
【００７２】
＜実施の形態１１＞
図２０は本発明の実施の形態１１に係る扁平形永久磁石式モータの要部構成図であり、図２０（ａ）にはヨーク部の分割面を離した状態で図示し、図２０（ｂ）にはヨーク部の分離面を当接させた状態で図示している。
【００７３】
図２０に示すように、本実施の形態１１の扁平形永久磁石式モータ２１では、ボビン４６の反ティース側の鍔部４６ｂにボビン突起部４６ａが鉄心周方向に突設されており、このボビン突起部４６ａ同士が当接することによってトルクによるボビン４６の鉄心周方向のずれを防止するように構成されている。
【００７４】
その他の構成については上記実施の形態１０と同様であり、ここでの説明は省略する。
【００７５】
本実施の形態１１の扁平形永久磁石式モータ２１によれば、ボビン４６のボビン突起部４６ａ同士が当接することにより、トルクによるボビン４６の鉄心周方向のずれを確実に防止することができる。
【００７６】
＜実施の形態１２＞
図２１（ａ）は本発明の実施の形態１２に係る扁平形永久磁石式モータの要部構成図、図２１（ｂ）は前記扁平形永久磁石式モータのヨーク結合部材の斜視図、図２１（ｃ）はヨーク結合部材の側面図である。
【００７７】
図２１に示すように、本実施の形態１２の扁平形永久磁石式モータ２１では、鉄心周方向に分割されたヨーク部２８の分割部分にヨーク結合部材５３を嵌めることにより、ヨーク部２８の分割部分のずれを防止するように構成されている。ヨーク結合部材５３は全体がコ字状であって両端に引っ掛かり部５３ａが形成されており、この引っ掛かり部５３ａがヨーク部２８（分割部分）に引っ掛かることによってヨーク部２８（分割部分）に確実に固定される。
【００７８】
なお、ヨーク部２７（分割部分）へのヨーク結合部材５３の嵌め込み作業を容易にするため、ヨーク結合部材５３の両端部の内面５３ａは、外側に向かうほど間隔が広がるテーパ面となっている。
【００７９】
その他の構成については上記実施の形態６と同様であり、ここでの説明は省略する。
【００８０】
本実施の形態１２の扁平形永久磁石式モータ２１によれば、ヨーク部２８の分割部分にヨーク結合部材５３を嵌めることにより、ヨーク部２８の分割部分のずれを確実に防止することができる。また、ヨーク結合部材５３は隣り合うボビン４６の間に介在することになるため、ボビン４６の鉄心周方向のずれを防止することもできる。
【００８１】
＜実施の形態１３＞
図２２は本発明の実施の形態１３に係る扁平形永久磁石式モータを下半分省略して示す縦断面図、図２３は前記扁平形永久磁石式モータの回転子鉄心の斜視図である。
【００８２】
上記実施の形態１の扁平形永久磁石式モータ２１ではアウターロータ部３２とインナーロータ部３３とが一体の回転子鉄心３５に設けられているのに対し（図２参照）、図２２及び図２３に示すように本実施の形態１３の扁平形永久磁石式モータ２１では、回転子鉄心が、アウターロータ部３２側の回転子鉄心３５Ａと、インナーロータ部３３側の回転子鉄心３５Ｂとに分割されている。
【００８３】
回転子鉄心３５Ａは円板状のベース部３４Ａの内側面３４Ａ−１（周縁部）にアウターロータ部３２を突設した構造となっており、回転子鉄心３５Ｂは円板状のベース部３４Ｂの内側面３４Ｂ−１（周縁部）にアウターロータ部３２を突設した構造となっている。なお、回転子鉄心３５Ａ（ベース部３４Ａ）と回転子鉄心３５Ｂ（ベース部３４Ｂ）は図示しないボルトなどによって分離可能に結合されている。
【００８４】
その他の構成については上記実施の形態１又は６と同様であり、ここでの説明は省略する。
【００８５】
本実施の形態１３の扁平形永久磁石式モータ２１によれば、回転子鉄心をアウターロータ部３２側の回転子鉄心３５Ａとインナーロータ部３３側の回転子鉄心３５Ｂとに分割したことにより、磁石取付（接着）作業時に回転子鉄心３５Ａと回転子鉄心３５Ｂとを分離して、回転子鉄心３５Ａ（アウターロータ部３２）への第１永久磁石３６の取付作業と、回転子鉄心３５Ｂ（インナーロータ部３３）への第２永久磁石３７の取付作業とを行うことができるため、第１永久磁石３６と第２永久磁石３７とが取付作業中にくっつくことを防止することができる。このため、磁石取付（接着）作業が容易である。
【００８６】
特に本実施の形態１３は扁平形永久磁石式モータ２１をエレベータなどの巻上機に適用する場合に有効であり、この場合にはシーブと一体化した外側の回転子鉄心３５Ａと、内側の回転子鉄心３５Ｂとを分離する構造となる。
【００８７】
なお、上記の実施の形態１〜１３の構成は、勿論、適宜に組み合わせてもよい。例えば実施の形態３のように第１及び第２永久磁石３６，３７に代えて第１及び第２鉄ピース４１，４２を用いた構成や、実施の形態４，５のように第２永久磁石３７を鉄心内部に埋め込んだ構成と、実施の形態６〜７のように固定子鉄心２５をヨーク部２８で分割した構成とを組み合わせてもよい。
【００８８】
【発明の効果】
以上発明の実施の形態とともに具体的に説明したように、第１発明の扁平形永久磁石式モータによれば、固定子と回転子とを有し、前記固定子は、絶縁材を介して巻線が縦巻きに巻かれたヨーク部と、前記ヨーク部のアウター側に設けた第１ティース部と、前記ヨーク部のインナー側に設けた第２ティース部とを有する構造の固定子鉄心と、この固定子鉄心を固定する板状のベースとを備えた構成とし、前記回転子は、前記固定子鉄心のアウター側に位置するアウターロータ部と、前記固定子鉄心のインナー側に位置するインナーロータ部とを円板状のベース部の側面に突設した構造の回転子鉄心を有し、且つ、前記アウターロータ部には複数の第１永久磁石を鉄心周方向に配設し、前記インナーロータ部には複数の第２永久磁石を前記第１永久磁石に対して同じ極が向き合うように鉄心周方向に配設してなるアウターロータ・インナーロータ複合形の構成としたことにより、ギャップ面積が大きく、また、漏れ磁束が小さいため、特性のよいモータとなる。また、従来の環状巻線とは違い、非磁性フレームが不要である。
【００８９】
また、第２発明の扁平形永久磁石式回転電機によれば、第１発明の扁平形永久磁石式回転電機において、対向している前記第１永久磁石と前記第２永久磁石の磁極位置を鉄心周方向にずらしたことにより、トルクリプルが低減し、より特性のよいモータとなる。
【００９０】
また、第３発明の扁平形永久磁石式回転電機によれば、第１発明の扁平形永久磁石式回転電機において、前記アウターロータ部では前記第１永久磁石を設けた極の次の極には前記第１永久磁石に代えて第１鉄ピースを設け、前記第１鉄ピースを設けた極の次の極には前記第１永久磁石を設けることにより、前記第１永久磁石と前記第１鉄ピースとを前記アウターロータ部の内周面に鉄心周方向に交互に配設し、前記インナーロータ部では前記第２永久磁石を設けた極の次の極には前記第２永久磁石に代えて第２鉄ピースを設け、前記第２鉄ピースを設けた極の次の極には前記第２永久磁石を設けることにより、前記第２永久磁石と前記第２鉄ピースとを前記インナーロータ部の外周面に鉄心周方向に交互に配設したため、第１及び第２永久磁石の数（磁石量）を減らすことができる。
【００９１】
また、第４発明の扁平形永久磁石式回転電機によれば、第１発明の扁平形永久磁石式回転電機において、前記インナーロータ部では、前記第２永久磁石を鉄心内部に埋め込んだため、高速回転が可能となる。
【００９２】
また、第５発明の扁平形永久磁石式回転電機は、第４発明の扁平形永久磁石式回転電機において、前記アウターロータ部では前記第１永久磁石を設けた極の次の極には前記第１永久磁石に代えて鉄ピースを設け、前記鉄ピースを設けた極の次の極には前記第１永久磁石を設けることにより、前記第１永久磁石と前記鉄ピースとを前記アウターロータ部の内周面に鉄心周方向に交互に配設し、前記インナーロータ部では前記第２永久磁石を設けた極の次の極は前記第２永久磁石も磁石埋め込み穴も設けない鉄心だけの部分とし、この鉄心だけの部分の極の次の極は前記第２永久磁石を設けることにより、前記第２永久磁石を埋め込んだ部分と前記鉄心だけの部分とが鉄心周方向に交互に存在する構造としたため、第１及び第２永久磁石の数（磁石量）を減らすことができる。
【００９３】
また、第６発明の扁平形永久磁石式回転電機によれば、第１乃至第５発明の何れか１つの扁平形永久磁石式回転電機において、前記固定子鉄心は鉄心周方向に前記ヨーク部で分割し、この分割したヨーク部のそれぞれに前記絶縁材を設けたことにより、ベースへの固定子鉄心（各鉄心分割部）の固定が簡単である。
【００９４】
また、第７発明の扁平形永久磁石式回転電機によれば、第６発明の扁平形永久磁石式回転電機において、前記絶縁材は筒状部と、この筒状部の両端に突設した鍔部とを有する構造のボビンであり、このボビンのティース側の鍔部を鉄心径方向の外側又は内側に延長して同鍔部が前記第１ティース部又は前記第２ティース部の内面に設けた凹部に嵌合するように構成したため、ボビンを簡単に仮止めすることができ、ボビンが抜けるのを防止することができる。
【００９５】
また、第８発明の扁平形永久磁石式回転電機によれば、第１乃至第７発明の何れか１つの扁平形永久磁石式回転電機において、前記巻線に前記巻線を覆うようにして帯状の絶縁材を巻き付けたことにより、対地絶縁が向上する。このため、隣り合う第１ティース部の間のスロット内や、隣り合う第２ティース部の間のスロット内における巻線占積率を高めることができる。
【００９６】
また、第９発明の扁平形永久磁石式回転電機によれば、第６発明の扁平形永久磁石式回転電機において、前記絶縁材は筒状部と、この筒状部の両端に突設した鍔部とを有する構造のボビンであり、このボビンの片側の鍔部にはこの鍔部と一体に蓋部を設け、この蓋部によって前記巻線のアウター側の面とインナー側の面とを覆うようにしたため、対地絶縁が向上する。このため、隣り合う第１ティース部の間のスロット内や、隣り合う第２ティース部の間のスロット内における巻線占積率を高めることができる。
【００９７】
また、第１０発明の扁平形永久磁石式回転電機によれば、第６乃至第９発明の何れか１つの扁平形永久磁石式回転電機において、鉄心周方向に分割した前記ヨーク部の一方の分割面に凸部を形成し他方の分割面に凹部を形成して、これらの凸部と凹部とが嵌合することにより前記ヨーク部の分割部分のずれを防止するように構成したため、ヨーク部の分割部分のずれを確実に防止することができる。
【００９８】
また、第１１発明の扁平形永久磁石式回転電機によれば、第７乃至第１０発明の何れか１つの扁平形永久磁石式回転電機において、前記ボビンの反ティース側の鍔部に鉄心周方向に突設したボビン突起部を備え、このボビン突起部同士が当接することによって前記ボビンの鉄心周方向のずれを防止するように構成したため、トルクによるボビンの鉄心周方向のずれを確実に防止することができる。
【００９９】
また、第１２発明の扁平形永久磁石式回転電機によれば、第６乃至第９発明の何れか１つの扁平形永久磁石式回転電機において、鉄心周方向に分割した前記ヨーク部の分割部分に同分割部分に引っ掛かる引っ掛かり部を両端に形成したコ字状のヨーク結合部材を嵌めることにより、前記ヨーク部の分割部分のずれを防止するように構成したため、ヨーク部の分割部分のずれを確実に防止することができる。また、ヨーク結合部材は隣り合うボビンの間に介在することになるため、ボビンの鉄心周方向のずれを防止することもできる。
【０１００】
また、第１３発明の扁平形永久磁石式回転電機は、第１乃至第１２発明の何れか１つの扁平形永久磁石式回転電機において、前記回転子鉄心は、前記アウターロータ部側の回転子鉄心と前記インナーロータ部側の回転子鉄心とに分割したため、磁石取付作業時にアウターロータ部側の回転子鉄心とインナーロータ部側の回転子鉄心とを分離して、アウターロータ部側の回転子鉄心への第１永久磁石の取付作業と、インナーロータ部側の回転子鉄心への第２永久磁石の取付作業とを行うことができるため、第１永久磁石と第２永久磁石とが取付作業中にくっつくことを防止することができる。このため、磁石取付作業が容易である。
【図面の簡単な説明】
【図１】本発明の実施の形態１に係る扁平形永久磁石式モータの横断面図である。
【図２】前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図である。
【図３】図１のＣ部拡大斜視図である。
【図４】前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【図５】本発明の実施の形態３に係る扁平形永久磁石式モータの横断面図である。
【図６】前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【図７】本発明の実施の形態４に係る扁平形永久磁石式モータの横断面図である。
【図８】前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図である。
【図９】本発明の実施の形態５に係る扁平形永久磁石式モータの横断面図である。
【図１０】前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【図１１】本発明の実施の形態６に係る扁平形永久磁石式モータの横断面図である。
【図１２】図１１のＤ部拡大断面図である。
【図１３】前記扁平形永久磁石式モータに備えたボビンの斜視図である。
【図１４】本発明の実施の形態７に係る扁平形永久磁石式モータの要部構成図である。
【図１５】本発明の実施の形態８に係る扁平形永久磁石式モータの要部構成図である。
【図１６】（ａ）は前記扁平形永久磁石式モータの巻線に絶縁紙を巻き付ける前の状態を示す斜視図、（ｂ）は前記巻線に絶縁紙を巻き付けた状態を示す斜視図である。
【図１７】本発明の実施の形態９に係る扁平形永久磁石式モータの要部構成図である。
【図１８】（ａ）は前記扁平形永久磁石式モータのボビンの蓋を閉じる前の状態を示す斜視図、（ｂ）は前記ボビンの蓋を閉じた状態を示す斜視図である。
【図１９】本発明の実施の形態１０に係る扁平形永久磁石式モータの要部構成図であり、（ａ）はヨーク部の分割面を離した状態の図示、（ｂ）はヨーク部の分離面を当接させた状態の図示である。
【図２０】本発明の実施の形態１１に係る扁平形永久磁石式モータの要部構成図であり、（ａ）はヨーク部の分割面を離した状態の図示、（ｂ）はヨーク部の分離面を当接させた状態の図示である。
【図２１】（ａ）は本発明の実施の形態１２に係る扁平形永久磁石式モータの要部構成図、（ｂ）は前記扁平形永久磁石式モータのヨーク結合部材の斜視図、（ｃ）はヨーク結合部材の側面図である。
【図２２】本発明の実施の形態１３に係る扁平形永久磁石式モータを下半分省略して示す縦断面図である。
【図２３】前記扁平形永久磁石式モータの回転子鉄心の斜視図である。
【図２４】従来の扁平形永久磁石式モータの横断面図である。
【図２５】前記扁平形永久磁石式モータの下半分を省略して示す縦断面拡大図である。
【図２６】図２４のＡ部拡大図である。
【図２７】前記扁平形永久磁石式モータにおける磁束の状態を示す説明図である。
【符号の説明】
２１　扁平形永久磁石式モータ
２２　固定子
２３　回転子
２４　ベース
２４ａ　内側面
２４ｂ　突起部
２４ｃ　突起部
２５　固定子鉄心
２６　ボビン
２６ａ　筒状部
２６ｂ　鍔部
２７　巻線
２７ａ　アウター側の面
２７ｂ　インナー側の面
２８　ヨーク部
２８ａ　分割面
２８ｂ　凸部
２８ｃ　凹部
２９　軸受
３０Ａ　第１ティース部
３０Ｂ　第２ティース部
３０Ａ−１　内面
３０Ａ−２　凹部
３０Ｂ−１　内面
３１　ボルト
３２　アウターロータ部
３２ａ　内周面
３３　インナーロータ部
３３ａ　外周面
３３ｂ　内周面
３４，３４Ａ，３４Ｂ　ベース部
３４ａ，３４Ａ−１，３４Ｂ−１　内側面
３５，３５Ａ，３５Ｂ　回転子鉄心
３６　第１永久磁石
３７　第２永久磁石
４１　第１鉄ピース
４２　第２鉄ピース
４３　鉄心部
４３ａ　磁石埋め込み穴
４４　鉄ピース
４５　鉄心だけの部分
４６　ボビン
４６ａ　筒状部
４６ｂ　鍔部
４６ｃ　蓋部
４６ｄ　鍔部と蓋部の間の部分
４７　絶縁紙
４７ａ　端部
４８　絶縁テープ
５１，５２　スロット
５３　ヨーク結合部材
５３ａ　引っ掛かり部
５３ｂ　端部の内面（テーパ面）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flat permanent magnet type rotating electric machine that is a flat permanent magnet type motor or generator.
[0002]
[Prior art]
FIG. 24 is a cross-sectional view of a conventional flat permanent magnet type motor, FIG. 25 is an enlarged vertical cross-sectional view showing the lower half of the flat permanent magnet type motor omitted, and FIG. 26 is an enlarged view of a portion A in FIG. is there.
[0003]
At present, as shown in FIG. 24, FIG. 25 and FIG. 26, the winding 13 is vertically wound around the stator core 11 divided by the teeth portion 10 so that a positive winding can be formed even with concentrated winding. The flat-type permanent magnet type motor 1 provided with the motor has been commercialized.
[0004]
More specifically, the illustrated conventional flat permanent magnet motor 1 is an inner rotor type motor in which a rotor 3 is provided inside a stator 2. The rotor 3 includes a rotating shaft 6 rotatably supported on a non-magnetic frame 4 via a bearing 5, a rotor core 7 fixed to the rotating shaft 6, and an outer circumferential surface of the rotor core 7 on an outer circumferential surface of the rotor core 7. The configuration includes a plurality of permanent magnets 8 disposed. The illustrated example is a case of four poles, and four permanent magnets 8 are provided.
[0005]
On the other hand, the stator 2 includes a stator core 11, a bobbin 12 for insulation, and a winding 13. The stator core 11 has a yoke portion 9 and a tooth portion 10 facing the permanent magnet 8. The stator core portion 11 is divided in the core portion circumferential direction at the tooth portion 10. It is fixed to the inner surface of the magnetic frame 4. The bobbin 12 is divided into two parts in the axial direction (axial direction of the rotating shaft), and is mounted on the yoke 9 from both sides in the axial direction. The winding 13 is wound vertically around the yoke 9 via the bobbin 12.
[0006]
[Problems to be solved by the invention]
The above-mentioned conventional flat permanent magnet type motor 1 has the following problems.
[0007]
(1) As shown in FIG. 27, the state of the magnetic flux is indicated by an arrow. There is a leaking magnetic flux, and a non-magnetic frame 4 is required to reduce the leaking magnetic flux.
(2) As shown in FIG. 26, since there is no insulating material in the slot 15 between the adjacent teeth 10 and the insulation to the ground is weak, the winding 13 is used to maintain the insulation distance between the teeth 10 and the winding 13. Is wound relatively small, and the space factor of the winding is poor.
(3) Since the stator core 11 is divided by the teeth 10, it is difficult to attach the stator core 11 (each core division).
[0008]
Accordingly, the present invention has been made in view of the above circumstances, and has been made to eliminate the need for a non-magnetic frame, to increase the space factor of a winding in a slot, and to facilitate the mounting of a stator core. It is an object to provide a flat permanent magnet type rotating electric machine.
[0009]
[Means for Solving the Problems]
A flat permanent magnet type rotating electric machine according to a first invention for solving the above problems has a stator and a rotor,
The stator includes a yoke portion in which a winding is wound vertically through an insulating material, a first tooth portion provided on an outer side of the yoke portion, and a second tooth provided on an inner side of the yoke portion. And a configuration having a stator core having a structure and a plate-shaped base for fixing the stator core,
The rotor has a structure in which an outer rotor portion located on the outer side of the stator core and an inner rotor portion located on the inner side of the stator core are protruded from a side surface of a disk-shaped base portion. A plurality of first permanent magnets are provided in the outer rotor portion in a circumferential direction of the iron core, and a plurality of second permanent magnets are provided in the inner rotor portion with respect to the first permanent magnets. The outer rotor and the inner rotor are combined so that the same poles face each other in the circumferential direction of the iron core.
[0010]
Further, the flat permanent magnet type rotating electric machine according to the second invention is a flat permanent magnet type rotating electric machine according to the first invention,
The magnetic pole positions of the first permanent magnet and the second permanent magnet facing each other are shifted in the circumferential direction of the iron core.
[0011]
The flat permanent magnet type rotating electric machine of the third invention is the flat permanent magnet type rotating electric machine of the first invention,
In the outer rotor portion, a first iron piece is provided instead of the first permanent magnet at a pole next to the pole provided with the first permanent magnet, and a pole next to the pole provided with the first iron piece is provided at the next pole. By providing the first permanent magnet, the first permanent magnet and the first iron piece are alternately arranged on the inner peripheral surface of the outer rotor portion in the iron core circumferential direction,
In the inner rotor portion, a second iron piece is provided in place of the second permanent magnet at a pole next to the pole provided with the second permanent magnet, and a second iron piece is provided next to the pole provided with the second permanent piece. By providing the second permanent magnet, the second permanent magnet and the second iron piece are alternately arranged on the outer peripheral surface of the inner rotor portion in the iron core circumferential direction.
[0012]
The flat permanent magnet type rotating electric machine of the fourth invention is the flat permanent magnet type rotating electric machine of the first invention,
In the inner rotor portion, the second permanent magnet is embedded in an iron core.
[0013]
The flat permanent magnet type rotating electric machine according to a fifth aspect of the present invention is the flat type permanent magnet type rotating electric machine according to the fourth aspect,
In the outer rotor portion, an iron piece is provided instead of the first permanent magnet at a pole next to the pole provided with the first permanent magnet, and the first permanent magnet is provided at a pole next to the pole provided with the iron piece. By providing a magnet, the first permanent magnet and the iron piece are alternately arranged on the inner peripheral surface of the outer rotor portion in the iron core circumferential direction,
In the inner rotor portion, the pole next to the pole provided with the second permanent magnet is a portion of only the iron core having neither the second permanent magnet nor the magnet embedding hole. By providing the second permanent magnet, a portion in which the second permanent magnet is embedded and a portion of the core alone are alternately arranged in the core circumferential direction.
[0014]
Further, the flat permanent magnet type rotating electric machine according to the sixth invention is the flat permanent magnet type rotating electric machine according to any one of the first to fifth inventions,
The stator core is divided at the yoke in the circumferential direction of the core, and the insulating material is provided on each of the divided yokes.
[0015]
The flat permanent magnet type rotating electric machine of the seventh invention is the flat permanent magnet type rotating electric machine of the sixth invention,
The insulating material is a bobbin having a structure having a tubular portion and flanges protruding from both ends of the tubular portion, and extending the teeth-side flange of the bobbin outward or inward in the iron core radial direction. The flange portion is configured to be fitted into a concave portion provided on an inner surface of the first tooth portion or the second tooth portion.
[0016]
The flat permanent magnet type rotating electric machine according to an eighth aspect of the present invention is the flat permanent magnet type rotating electric machine according to any one of the first to seventh aspects,
A band-shaped insulating material is wound around the winding so as to cover the winding.
[0017]
The flat permanent magnet type rotating electric machine according to a ninth aspect is the flat permanent magnet type rotating electric machine according to the sixth aspect,
The insulating material is a bobbin having a tubular portion and a structure having flanges protruding from both ends of the tubular portion, and a lid portion is provided integrally with the flange portion on one side of the bobbin, The outer surface and the inner surface of the winding are covered by the lid.
[0018]
A flat permanent magnet type rotating electric machine according to a tenth aspect of the present invention is the flat permanent magnet type rotating electric machine according to any one of the sixth to ninth aspects,
A projecting portion is formed on one of the divided surfaces of the yoke portion divided in the circumferential direction of the iron core, and a concave portion is formed on the other divided surface. It is characterized in that it is configured to prevent the displacement.
[0019]
The flat permanent magnet type rotating electric machine according to the eleventh invention is the flat permanent magnet rotating electric machine according to any one of the seventh to tenth inventions,
The bobbin is provided with a bobbin projection projecting in a circumferential direction of an iron core on a flange portion on a side opposite to a tooth, and configured so as to prevent the bobbin from shifting in the circumferential direction of the iron core by contacting the bobbin projections. Features.
[0020]
A flat permanent magnet type rotating electric machine according to a twelfth aspect is the flat permanent magnet type rotating electric machine according to any one of the sixth to ninth aspects,
By fitting a U-shaped yoke coupling member having hook portions formed on both ends thereof to be hooked to the divided portion of the yoke portion divided in the circumferential direction of the iron core, the displacement of the divided portion of the yoke portion is prevented. It is characterized by comprising.
[0021]
The flat permanent magnet type rotating electric machine according to the thirteenth invention is the flat permanent magnet rotating electric machine according to any one of the first to twelfth inventions,
The rotor core is divided into a rotor core on the outer rotor section side and a rotor core on the inner rotor section side.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
<Embodiment 1>
FIG. 1 is a cross-sectional view of a flat permanent magnet motor according to Embodiment 1 of the present invention, FIG. 2 is an enlarged vertical cross-sectional view showing a lower half of the flat permanent magnet motor, and FIG. FIG. 4 is an enlarged perspective view of a portion C of FIG. 1 and FIG. 4 is an explanatory view showing a state of magnetic flux in the flat permanent magnet type motor.
[0024]
As shown in FIGS. 1, 2, and 3, the flat permanent magnet motor 21 according to the first embodiment has a stator 22 and a rotor 23.
[0025]
The stator 22 has a base 24, a stator core 25, an insulating bobbin 26, and a winding 27. The base 24 has a disk shape, and a protrusion 24b for attaching the stator core 25 is formed on the inner side surface 24a. A projection 24c for rotatably supporting the rotor 23 via a bearing 29 is formed at the center of the base side surface 24a. Note that the base 24 is not necessarily limited to a disc-shaped one, and may be, for example, a rectangular plate-shaped one.
[0026]
The stator core 25 has a yoke part 28, a first teeth part 30A, and a second teeth part 30B. The yoke portion 28 extends in the circumferential direction of the iron core, and is located between adjacent tooth portions (first and second tooth portions 30A and 30B). The first teeth portion 30 is provided on the outer side of the yoke portion 28 (outside of the yoke portion in the iron core radial direction), and the second tooth is provided on the inner side of the yoke portion 28 (inner of the yoke portion in the iron core radial direction). A portion 30B is provided, and the entire teeth portion is shaped like a letter D. In addition, the stator core 25 is divided at the tooth portions (the first and second tooth portions 30A and 30) in the circumferential direction of the core. Each of the iron core divided portions divided by the teeth portion is fixed to the protruding portion 24b on the side surface 24a of the base 24 by a bolt 31.
[0027]
The bobbin 26 is formed of an insulating material such as a resin, and has a structure having a cylindrical portion 26a and flanges 26b protruding from both ends of the cylindrical portion 26a. The bobbin 26 is divided into two parts in the axial direction (axial direction of the rotating shaft) in the same manner as in the prior art, and is mounted on the yoke part 28 from both sides in the axial direction. The winding 27 is an annular winding that is vertically wound around the yoke 28 via the bobbin 26. That is, when the winding 27 is energized, a magnetic flux in the circumferential direction of the iron core is generated at the center (yoke portion 28) of the winding 27.
[0028]
On the other hand, the rotor 23 has a combined outer rotor / inner rotor configuration.
[0029]
More specifically, the rotor core 35 has a structure in which an outer rotor portion 32 and an inner rotor portion 33 are provided protruding from an inner surface 34a of a disk-shaped base portion 34. The outer rotor portion 32 is located on the outer side (outside in the radial direction of the iron core) of the stator core 25, and a plurality of first permanent magnets 36 are adhered to the inner peripheral surface 32a with an adhesive and arranged in the circumferential direction of the iron core. Is established. These first permanent magnets 36 face the first teeth portions 30A of the stator core 25 with a gap therebetween. The inner rotor portion 33 is located on the inner side (the inner side in the radial direction of the iron core) of the stator core 25, and the inner peripheral surface 33 b is rotatably supported by the projection 24 c of the base 24 via the bearing 29, and the outer peripheral surface 33 a Is provided with a plurality of second permanent magnets 37 bonded with an adhesive in the circumferential direction of the iron core. These second permanent magnets 37 face the second teeth portions 30B of the stator core 25 with a gap therebetween.
[0030]
Further, the second permanent magnet 37 is disposed so that the same pole faces the first permanent magnet 36. That is, when the magnetic pole on the inner surface side of the first permanent magnet 36 is the N pole, the first permanent magnet 37 facing the first permanent magnet 36 has the magnetic pole on the outer surface side as the N pole, and the first permanent magnet 36 When the inner magnetic pole is an S pole, the first permanent magnet 37 facing the first permanent magnet 36 has the outer magnetic pole as the S pole. The illustrated example is a case of four poles, and four first permanent magnets 36 and four second permanent magnets 37 are provided.
[0031]
According to the flat permanent magnet type motor 21 of the first embodiment, the magnetic flux acts on the outer rotor section 32 side and the inner rotor section 33 side as shown in FIG. The torque is generated between the portion 33 side. The flat permanent magnet motor 21 according to the first embodiment has a large gap area and a small leakage magnetic flux, so that the motor has good characteristics. Further, unlike the conventional annular winding, a non-magnetic frame is not required.
[0032]
<Embodiment 2>
Although not shown, in the flat permanent magnet type motor according to the second embodiment of the present invention, in the flat permanent magnet type motor 21 shown in FIGS. The magnetic pole position of the permanent magnet 37 (the mounting position in the circumferential direction of the iron core) is shifted in the circumferential direction of the iron core.
[0033]
Other configurations are the same as those in the first embodiment, and a description thereof will not be repeated.
[0034]
According to the flat permanent magnet type motor 1 of the second embodiment, by shifting the magnetic pole positions of the opposed first permanent magnet 36 and second permanent magnet 37 in the circumferential direction of the iron core, torque ripple is reduced, The motor has better characteristics.
[0035]
<Embodiment 3>
FIG. 5 is a cross-sectional view of a flat permanent magnet motor according to Embodiment 3 of the present invention, and FIG. 6 is an explanatory diagram showing a state of magnetic flux in the flat permanent magnet motor.
[0036]
As shown in FIG. 5, in the flat permanent magnet type motor 21 according to the third embodiment, a first permanent magnet 36 and a first iron piece formed by laminating a silicon steel plate are formed on the inner peripheral surface 32 a of the outer rotor portion 32. 41 are alternately arranged in the circumferential direction of the iron core. A second permanent magnet 37 and a second iron piece 42 formed by stacking silicon steel plates are provided on the outer peripheral surface 33a of the inner rotor portion 33 in the circumferential direction of the iron core. They are arranged alternately.
[0037]
That is, in contrast to the flat permanent magnet type motor 21 of the first embodiment, in the flat permanent magnet type motor 21 of the third embodiment, the outer rotor portion 32 is located next to the pole provided with the first permanent magnet 36. The first permanent magnet 36 is provided in place of the first permanent magnet 36 in place of the first permanent magnet 36, and the first permanent magnet 36 is provided in the pole next to the pole provided with the first iron piece 41. One iron piece 41 is alternately arranged on the inner peripheral surface 32a of the outer rotor portion 32 in the circumferential direction of the iron core. In the inner rotor portion 33, the second permanent magnet 37 is provided on the second pole next to the pole provided with the second permanent magnet 37. By providing the second iron piece 42 in place of the magnet 37 and providing the second permanent magnet 47 on the pole next to the pole on which the second iron piece 42 is provided, the second permanent magnet 37 and the second iron piece 42 are connected. The outer peripheral surface 33a of the inner rotor 33 is And it has a configuration which is arranged to.
[0038]
In the illustrated example, the first permanent magnet 36 and the second permanent magnet 37 face each other, and the first iron piece 41 and the second iron piece 42 face each other. The present invention is not necessarily limited to this, and the first permanent magnet 36 and the second iron piece 42 may be opposed to each other, and the first iron piece 41 and the second permanent magnet 37 may be opposed to each other.
[0039]
Other configurations are the same as those in the first embodiment, and a description thereof will not be repeated. The state of the magnetic flux in the flat permanent magnet type motor 21 of the third embodiment is as shown in FIG. 6, which is the same as that of the first embodiment (see FIG. 4).
[0040]
According to the flat permanent magnet type motor 21 of the third embodiment, the first and second permanent magnets 36 and 37 are partially replaced with the first and second iron pieces 41 and 42, respectively. The number (magnet amount) of the first and second permanent magnets 36 and 37 can be reduced.
[0041]
<Embodiment 4>
FIG. 7 is a transverse sectional view of a flat permanent magnet type motor according to Embodiment 4 of the present invention, and FIG. 8 is an enlarged longitudinal sectional view of the flat permanent magnet type motor with a lower half omitted.
[0042]
As shown in FIGS. 7 and 8, the flat permanent magnet motor 21 according to the fourth embodiment has a configuration in which the second permanent magnet 37 on the inner rotor portion 33 side is embedded in the core. More specifically, the inner rotor portion 33 of the rotor core 35 is further provided with an iron core portion 43 formed by laminating silicon steel plates. Four magnet embedding holes 43 a formed in the iron core portion 43 have four Two permanent magnets 37 are embedded respectively.
[0043]
Other configurations are the same as those in the first embodiment, and a description thereof will not be repeated.
[0044]
According to the flat permanent magnet type motor 21 of the fourth embodiment, since the second permanent magnet 37 of the inner rotor section 33 is embedded in the core, high-speed rotation is possible.
[0045]
<Embodiment 5>
FIG. 9 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 5 of the present invention, and FIG. 10 is an explanatory diagram showing a state of magnetic flux in the flat permanent magnet type motor.
[0046]
As shown in FIG. 9, in the flat permanent magnet type motor 21 according to the fifth embodiment, the first permanent magnet 36 and the iron piece 44 formed by stacking silicon steel plates are provided on the inner peripheral surface 32 a of the outer rotor portion 32. Are alternately arranged in the circumferential direction of the iron core, and a portion in which the second permanent magnet 37 is embedded in the inner rotor portion 33 and a portion 45 of only the iron core having neither the second permanent magnet nor the magnet embedding hole are formed in the circumferential direction of the iron core. Are alternately provided.
[0047]
That is, in contrast to the flat permanent magnet type motor 21 of the first embodiment, in the flat permanent magnet type motor 21 of the fifth embodiment, the outer rotor portion 32 is located next to the pole provided with the first permanent magnet 36. The first permanent magnet 36 and the iron piece 44 are provided by providing the iron piece 44 in place of the first permanent magnet 36 in the The inner peripheral surface 32a of the outer rotor portion 32 is arranged alternately in the circumferential direction of the iron core. In the inner rotor portion 33, the pole next to the pole provided with the second permanent magnet 37 is used for both the second permanent magnet and the magnet embedded hole. By providing a portion 45 only of the iron core not provided and providing the second permanent magnet 37 at the pole next to the pole of the portion 45 only of the iron core, the portion in which the second permanent magnet 37 is embedded and the portion 45 only of the iron core are connected to the core 45. Structure that exists alternately in the circumferential direction Going on.
[0048]
In the illustrated example, the first permanent magnet 36 and the second permanent magnet 37 face each other, and the iron piece 44 and the portion 45 including only the iron core face each other. The present invention is not limited to this, and the first permanent magnet 36 and the portion 45 including only the iron core may face each other, and the iron piece 44 and the second permanent magnet 37 may face each other.
[0049]
Other configurations are the same as those of the above-described fourth embodiment, and a description thereof will not be repeated. The state of the magnetic flux in the flat permanent magnet type motor 21 according to the fifth embodiment is as shown in FIG. 10, which is the same as that in the first embodiment (see FIG. 4).
[0050]
According to the flat permanent magnet type motor 21 of the fifth embodiment, a part of the first permanent magnet 36 is replaced with the iron piece 44 and a part of the second permanent magnet 37 is replaced with the part 45 having only the iron core. Thus, the number (magnet amount) of the first and second permanent magnets 36 and 37 can be reduced.
[0051]
<Embodiment 6>
FIG. 11 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 6 of the present invention, and FIG. 12 is an enlarged cross-sectional view of a portion D in FIG. In FIG. 12, the yoke portion is illustrated with the divided surfaces separated. FIG. 13 is a perspective view of a bobbin provided in the flat permanent magnet type motor.
[0052]
As shown in FIGS. 11 and 12, in the flat permanent magnet type motor 21 according to the sixth embodiment, the stator core 25 is divided by the yoke 28 in the circumferential direction of the core. An insulating bobbin 46 is mounted on each of the divided yoke portions 28. That is, two bobbins 46 are provided in each slot between the adjacent tooth portions (the first and second tooth portions 30A and 30B). Each of the iron core divided portions divided by the yoke portion 28 is fixed to the protruding portion 24b on the side surface 24a of the base 24 by a bolt 31. The winding 27 is vertically wound around each of the divided yoke portions 28 via a bobbin 46.
[0053]
The bobbin 46 is formed of an insulating material such as a resin, and has a structure including a cylindrical portion 46a and flange portions 46b protruding from both ends of the cylindrical portion 46a as shown in FIG. I have. In this case, the bobbin 46 is mounted so that each of the divided yoke portions 28 is inserted into the cylindrical portion 46a of the bobbin 46 from the axial direction.
[0054]
Other configurations are the same as those in the first embodiment, and a description thereof will not be repeated.
[0055]
According to the flat permanent magnet type motor 21 of the sixth embodiment, the stator core 25 is not divided by the teeth (the first and second teeth 30A and 30B) but is divided by the yoke 28. Therefore, it is easy to fix the stator core 25 (each core division portion) to the base 24.
[0056]
<Embodiment 7>
FIG. 14 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 7 of the present invention, and shows a state in which the divided surfaces of the yoke are separated, as in FIG.
[0057]
As shown in FIG. 14, in the flat permanent magnet motor 21 of the seventh embodiment, the teeth-side flange 46b of the bobbin 46 extends outward in the iron core radial direction, and the inner surface of the first teeth 30A is formed. It is fitted into the recess 30A-1 provided in 30A-1. In this case, when the bobbin 46 is attached (inserted) to the yoke portion 28, the extended portion of the flange portion 46b needs to be bent. Therefore, the bobbin 46 is formed of a flexible material such as a resin.
[0058]
Other configurations are the same as those in the sixth embodiment, and a description thereof will not be repeated.
[0059]
According to the flat permanent magnet type motor 21 of the seventh embodiment, the bobbin 46 can be easily temporarily provisionally extended by extending the flange portion 46b of the bobbin 46 and fitting the flange portion 46b into the concave portion 30A-2 of the first teeth portion 30A. It can be stopped and the bobbin 46 can be prevented from coming off. Although not shown, the flange portion 46b of the bobbin 46 may be extended inward in the radial direction of the iron core so as to fit into the concave portion formed on the inner surface 30B-1 of the second teeth portion 30B.
[0060]
<Embodiment 8>
FIG. 15 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 8 of the present invention, and FIG. 16 (a) shows a state before insulating paper is wound around windings of the flat permanent magnet type motor. FIG. 16B is a perspective view showing a state in which insulating paper is wound around the winding.
[0061]
As shown in FIGS. 15 and 16, in the flat permanent magnet type motor 21 of the eighth embodiment, an insulating paper 47 as a band-shaped insulating material is wound around the winding 27 so as to cover the winding 27. ing. The end 47 a of the insulating paper 47 wound around the winding 27 is stopped by an insulating tape 48.
[0062]
Other configurations are the same as those in the sixth embodiment, and a description thereof will not be repeated.
[0063]
According to the flat permanent magnet motor 21 of the eighth embodiment, the insulation to ground is improved by winding the insulating paper 47 around the winding 27. For this reason, it is possible to increase the winding space factor in the slot 51 between the adjacent first teeth portions 30A and in the slot 52 between the adjacent second teeth portions 30B.
[0064]
<Embodiment 9>
FIG. 17 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 9 of the present invention, and FIG. 18 (a) is a perspective view showing a state before closing a bobbin cover of the flat permanent magnet type motor. FIG. 18B is a perspective view showing a state in which the lid of the bobbin is closed.
[0065]
As shown in FIGS. 17 and 18, in the flat permanent magnet type motor 21 of the ninth embodiment, a lid 46c is provided integrally with the flange 46b on one side of the bobbin 46. The lid portion 46c can be easily raised and lowered (opened and closed) by making the portion 46d between the lid portion 46c and the flange portion 46b thin by cutting out or the like. When the bobbin 46 is mounted on the yoke portion 28, the winding 27 is wound vertically around the cylindrical portion 46a of the bobbin 46, and then the bobbin 46 is fitted (inserted) into the yoke portion 27. The cover 46c is brought down (closed) as shown in FIG. 18 (b) by falling down as shown by an arrow E in FIG. 18 (a), and the outer surface 27a of the winding 27 and the inner Side surface 27b. In this case, the bobbin 46 is desirably formed of resin.
[0066]
Other configurations are the same as those in the sixth embodiment, and a description thereof will not be repeated.
[0067]
According to the flat permanent magnet type motor 21 of the ninth embodiment, the outer surface 27a and the inner surface 27b of the winding 27 are covered by the lid 46c of the bobbin 46, so that the ground insulation is improved. . For this reason, it is possible to increase the winding space factor in the slot 51 between the adjacent first teeth portions 30A and in the slot 52 between the adjacent second teeth portions 30B.
[0068]
<Embodiment 10>
FIG. 19 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 10 of the present invention. FIG. 19 (a) shows a state where the divided surfaces of the yoke are separated, and FIG. () Shows a state in which the separation surface of the yoke portion is in contact with the yoke portion.
[0069]
As shown in FIG. 19, in the flat permanent magnet type motor 21 according to the tenth embodiment, a projection 28b is formed on one division surface 28a of the yoke 28 divided in the circumferential direction of the iron core, and the other division surface A concave portion 28c is formed in 28a, and the convex portion 28b and the concave portion 28c are fitted so as to prevent the divided portion of the yoke portion 28 from shifting.
[0070]
Other configurations are the same as those in the sixth embodiment, and a description thereof will not be repeated.
[0071]
According to the flat permanent magnet type motor 21 of the tenth embodiment, displacement of the divided portion of the yoke portion 28 can be reliably prevented by fitting the convex portion 28b and the concave portion 28c of the divided surface 28a. .
[0072]
<Embodiment 11>
FIG. 20 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 11 of the present invention. FIG. 20 (a) shows a state in which the divided surfaces of the yoke are separated, and FIG. () Shows a state in which the separation surface of the yoke portion is in contact with the yoke portion.
[0073]
As shown in FIG. 20, in the flat permanent magnet type motor 21 according to the eleventh embodiment, a bobbin projection 46a is provided on a flange 46b on the side opposite to the teeth of the bobbin 46 so as to protrude in the core circumferential direction. The protrusions 46a are configured to abut each other to prevent the bobbin 46 from shifting in the iron core circumferential direction due to torque.
[0074]
Other configurations are the same as those in the above-described tenth embodiment, and a description thereof will not be repeated.
[0075]
According to the flat permanent magnet type motor 21 of the eleventh embodiment, since the bobbin projections 46a of the bobbin 46 abut against each other, the displacement of the bobbin 46 in the iron core circumferential direction due to the torque can be reliably prevented.
[0076]
<Embodiment 12>
FIG. 21 (a) is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 12 of the present invention, FIG. 21 (b) is a perspective view of a yoke coupling member of the flat permanent magnet type motor, and FIG. (C) is a side view of the yoke coupling member.
[0077]
As shown in FIG. 21, in the flat permanent magnet type motor 21 according to the twelfth embodiment, the yoke portion 28 is divided by fitting the yoke coupling member 53 into the divided portion of the yoke portion 28 divided in the iron core circumferential direction. It is configured to prevent displacement of the parts. The yoke coupling member 53 has a U-shape as a whole, and has hook portions 53a formed at both ends. The hook portions 53a are securely hooked on the yoke portions 28 (divided portions) to be securely attached to the yoke portions 28 (divided portions). Fixed.
[0078]
In addition, in order to facilitate the work of fitting the yoke coupling member 53 into the yoke portion 27 (divided portion), the inner surfaces 53a at both ends of the yoke coupling member 53 are tapered surfaces that increase in distance outward.
[0079]
Other configurations are the same as those in the sixth embodiment, and a description thereof will not be repeated.
[0080]
According to the flat permanent magnet type motor 21 of the twelfth embodiment, displacement of the divided portion of the yoke portion 28 can be reliably prevented by fitting the yoke coupling member 53 into the divided portion of the yoke portion 28. Further, since the yoke coupling member 53 is interposed between the adjacent bobbins 46, it is possible to prevent the bobbin 46 from shifting in the iron core circumferential direction.
[0081]
<Thirteenth embodiment>
FIG. 22 is a longitudinal sectional view showing a flat permanent magnet type motor according to Embodiment 13 of the present invention with a lower half omitted, and FIG. 23 is a perspective view of a rotor core of the flat permanent magnet type motor.
[0082]
In the flat permanent magnet motor 21 according to the first embodiment, the outer rotor portion 32 and the inner rotor portion 33 are provided on the integral rotor core 35 (see FIG. 2), whereas FIGS. In the flat permanent magnet type motor 21 of the thirteenth embodiment, the rotor core is divided into a rotor core 35A on the outer rotor section 32 side and a rotor core 35B on the inner rotor section 33 side as shown in FIG. ing.
[0083]
The rotor core 35A has a structure in which an outer rotor portion 32 protrudes from an inner side surface 34A-1 (peripheral edge) of a disc-shaped base portion 34A, and the rotor core 35B has a disc-shaped base portion 34B. The outer rotor portion 32 is provided on the inner side surface 34B-1 (peripheral portion). The rotor core 35A (base portion 34A) and the rotor core 35B (base portion 34B) are separably connected by bolts (not shown).
[0084]
Other configurations are the same as those in the above-described first or sixth embodiment, and a description thereof will not be repeated.
[0085]
According to the flat permanent magnet type motor 21 of the thirteenth embodiment, the rotor core is divided into the rotor core 35A on the outer rotor section 32 side and the rotor core 35B on the inner rotor section 33 side. At the time of attachment (adhesion) work, the rotor core 35A and the rotor core 35B are separated, the work of attaching the first permanent magnet 36 to the rotor core 35A (the outer rotor section 32), and the work of the rotor core 35B (the inner rotor). Since the operation of attaching the second permanent magnet 37 to the portion 33) can be performed, it is possible to prevent the first permanent magnet 36 and the second permanent magnet 37 from sticking during the attachment operation. For this reason, the magnet mounting (adhesion) work is easy.
[0086]
In particular, the thirteenth embodiment is effective when the flat permanent magnet type motor 21 is applied to a hoist such as an elevator. In this case, an outer rotor core 35A integrated with a sheave and an inner rotor It becomes the structure which separates the iron core 35B.
[0087]
The configurations of the first to thirteenth embodiments may, of course, be appropriately combined. For example, a configuration using first and second iron pieces 41 and 42 instead of the first and second permanent magnets 36 and 37 as in the third embodiment, or a second permanent magnet as in the fourth and fifth embodiments. A configuration in which 37 is embedded in the core may be combined with a configuration in which stator core 25 is divided by yoke portion 28 as in the sixth and seventh embodiments.
[0088]
【The invention's effect】
As specifically described above with the embodiment of the present invention, according to the flat permanent magnet type motor of the first invention, a stator and a rotor are provided, and the stator is wound with an insulating material interposed therebetween. A stator core having a structure including a yoke portion in which a wire is wound vertically, a first teeth portion provided on an outer side of the yoke portion, and a second teeth portion provided on an inner side of the yoke portion; The rotor includes a plate-shaped base for fixing the stator core, the rotor includes an outer rotor portion located on the outer side of the stator core, and an inner rotor located on the inner side of the stator core. A plurality of first permanent magnets disposed in the outer rotor portion in a circumferential direction of the core, wherein the inner rotor is provided with a plurality of first permanent magnets. A plurality of second permanent magnets in the first part. The outer rotor / inner rotor combined type configuration in which the same poles face the negative magnet in the circumferential direction of the core has a large gap area and a small leakage magnetic flux, so it has good characteristics. It becomes a motor. Further, unlike the conventional annular winding, a non-magnetic frame is not required.
[0089]
Further, according to the flat permanent magnet type rotating electric machine of the second invention, in the flat permanent magnet type rotating electric machine of the first invention, the magnetic pole positions of the opposed first and second permanent magnets are determined by the iron core. By displacing in the circumferential direction, torque ripple is reduced, and a motor having better characteristics is obtained.
[0090]
Further, according to the flat permanent magnet type rotating electric machine of the third invention, in the flat permanent magnet type rotating electric machine of the first invention, the outer rotor portion has a pole next to the pole provided with the first permanent magnet. A first iron piece is provided in place of the first permanent magnet, and the first permanent magnet is provided on the pole next to the pole on which the first iron piece is provided, so that the first permanent magnet and the first iron Pieces are alternately arranged in the circumferential direction of the iron core on the inner peripheral surface of the outer rotor portion. In the inner rotor portion, a pole next to the pole provided with the second permanent magnet is replaced with the second permanent magnet. A second iron piece is provided, and the second permanent magnet is provided on a pole next to the pole on which the second iron piece is provided, so that the second permanent magnet and the second iron piece are connected to the inner rotor section. The first and second permanent magnets are alternately arranged on the outer peripheral surface in the circumferential direction of the iron core. The number of (weight magnet) can be reduced.
[0091]
According to the flat permanent magnet type rotating electric machine of the fourth invention, in the flat permanent magnet type rotating electric machine of the first invention, in the inner rotor portion, the second permanent magnet is embedded in the core, so that Rotation becomes possible.
[0092]
The flat permanent magnet type rotating electric machine according to a fifth aspect of the present invention is the flat type permanent magnet type rotating electric machine according to the fourth aspect of the present invention, wherein the outer rotor portion includes the second permanent magnet next to the pole provided with the first permanent magnet. By providing an iron piece in place of one permanent magnet and providing the first permanent magnet on the pole next to the pole on which the iron piece is provided, the first permanent magnet and the iron piece In the inner rotor portion, the poles next to the poles provided with the second permanent magnets are alternately disposed on the inner peripheral surface in the circumferential direction of the iron core, and the poles next to the poles provided with the second permanent magnets are portions of only the cores not provided with the second permanent magnets or the magnet embedding holes. By providing the second permanent magnet, the pole next to the pole of the core only portion has a structure in which the portion in which the second permanent magnet is embedded and the core only portion alternately exist in the core circumferential direction. The number of the first and second permanent magnets (magnetic Amount) can be reduced.
[0093]
According to the flat permanent magnet type rotating electric machine of the sixth invention, in the flat permanent magnet type rotating electric machine according to any one of the first to fifth inventions, the stator core is connected to the yoke portion in a core circumferential direction. By dividing the yoke portion and providing the insulating material in each of the divided yoke portions, it is easy to fix the stator core (each core portion) to the base.
[0094]
According to the flat permanent magnet type rotary electric machine of the seventh invention, in the flat permanent magnet type rotary electric machine of the sixth invention, the insulating material is a cylindrical portion and flanges protruding from both ends of the cylindrical portion. And a flange on the teeth side of the bobbin is extended outward or inward in the radial direction of the iron core, and the flange is provided on the inner surface of the first tooth portion or the second tooth portion. Since the configuration is such that the bobbin is fitted into the concave portion, the bobbin can be easily temporarily fixed, and the bobbin can be prevented from coming off.
[0095]
According to the flat permanent magnet type rotating electric machine of the eighth invention, in the flat permanent magnet type rotating electric machine of any one of the first to seventh inventions, the windings cover the windings so as to cover the windings. Winding the insulating material improves ground insulation. Therefore, it is possible to increase the space factor of the winding in the slot between the adjacent first teeth portions and in the slot between the adjacent second teeth portions.
[0096]
Further, according to the flat permanent magnet type rotating electric machine of the ninth invention, in the flat permanent magnet type rotating electric machine of the sixth invention, the insulating material comprises a cylindrical portion and flanges protruding from both ends of the cylindrical portion. A bobbin having a structure having a part, and a lid part is provided integrally with the flange part on one side of the bobbin, and the lid part covers the outer side surface and the inner side surface of the winding. As a result, ground insulation is improved. Therefore, it is possible to increase the space factor of the winding in the slot between the adjacent first teeth portions and in the slot between the adjacent second teeth portions.
[0097]
According to the flat permanent magnet type rotating electric machine of the tenth aspect, in the flat permanent magnet type rotating electric machine according to any one of the sixth to ninth aspects, one of the yoke portions divided in the circumferential direction of the iron core is divided. A convex portion is formed on the surface and a concave portion is formed on the other divided surface, and the convex portion and the concave portion are fitted to prevent the displacement of the divided portion of the yoke portion. The displacement of the divided portion can be reliably prevented.
[0098]
According to the flat permanent magnet type rotating electric machine of the eleventh aspect, in the flat permanent magnet type rotating electric machine of any one of the seventh to tenth aspects, a flange portion of the bobbin on a side opposite to the teeth is provided in a circumferential direction of an iron core. The bobbin projecting portions are provided so as to prevent the bobbin from being displaced in the circumferential direction of the iron core by abutting the bobbin projecting portions, so that the displacement of the bobbin in the circumferential direction of the iron core due to torque is reliably prevented. be able to.
[0099]
Further, according to the flat permanent magnet type rotating electric machine of the twelfth aspect, in the flat permanent magnet type rotating electric machine according to any one of the sixth to ninth aspects, the divided portion of the yoke portion divided in the circumferential direction of the iron core is provided. By fitting a U-shaped yoke coupling member having hook portions formed at both ends to be hooked on the same divided portion to prevent the displacement of the divided portion of the yoke portion, the displacement of the divided portion of the yoke portion is surely prevented. Can be prevented. Further, since the yoke connecting member is interposed between the adjacent bobbins, it is possible to prevent the bobbin from shifting in the iron core circumferential direction.
[0100]
A flat permanent magnet type rotating electric machine according to a thirteenth aspect is the flat permanent magnet type rotating electric machine according to any one of the first to twelfth aspects, wherein the rotor core is a rotor core on the outer rotor portion side. And the rotor core on the inner rotor portion side, so that the rotor core on the outer rotor portion side and the rotor core on the inner rotor portion side are separated during the magnet mounting operation, and the rotor core on the outer rotor portion side is separated. The first permanent magnet and the second permanent magnet can be attached to the rotor core on the inner rotor portion side, and the first permanent magnet and the second permanent magnet can be attached to the rotor core. Can be prevented from sticking. For this reason, the magnet mounting operation is easy.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 1 of the present invention.
FIG. 2 is an enlarged vertical cross-sectional view showing a lower half of the flat permanent magnet type motor, omitting a lower half thereof.
FIG. 3 is an enlarged perspective view of a portion C in FIG. 1;
FIG. 4 is an explanatory diagram showing a state of a magnetic flux in the flat permanent magnet type motor.
FIG. 5 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 3 of the present invention.
FIG. 6 is an explanatory diagram showing a state of a magnetic flux in the flat permanent magnet type motor.
FIG. 7 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 4 of the present invention.
FIG. 8 is an enlarged vertical cross-sectional view showing a lower part of the flat permanent magnet type motor by omitting a lower half thereof.
FIG. 9 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 5 of the present invention.
FIG. 10 is an explanatory diagram showing a state of a magnetic flux in the flat permanent magnet type motor.
FIG. 11 is a cross-sectional view of a flat permanent magnet type motor according to Embodiment 6 of the present invention.
FIG. 12 is an enlarged sectional view of a part D in FIG. 11;
FIG. 13 is a perspective view of a bobbin provided in the flat permanent magnet type motor.
FIG. 14 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 7 of the present invention.
FIG. 15 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 8 of the present invention.
FIG. 16A is a perspective view showing a state before insulating paper is wound around a winding of the flat permanent magnet type motor, and FIG. 16B is a perspective view showing a state where insulating paper is wound around the winding. is there.
FIG. 17 is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 9 of the present invention.
18A is a perspective view showing a state before the lid of the bobbin of the flat permanent magnet type motor is closed, and FIG. 18B is a perspective view showing a state where the lid of the bobbin is closed.
FIGS. 19A and 19B are main part configuration diagrams of a flat permanent magnet type motor according to Embodiment 10 of the present invention, wherein FIG. 19A shows a state in which a dividing surface of a yoke portion is separated, and FIG. It is the illustration of the state where the separation surface was contacted.
20A and 20B are main part configuration diagrams of a flat permanent magnet type motor according to an eleventh embodiment of the present invention, wherein FIG. 20A illustrates a state in which a dividing surface of a yoke portion is separated, and FIG. It is the illustration of the state where the separation surface was contacted.
FIG. 21 (a) is a main part configuration diagram of a flat permanent magnet type motor according to Embodiment 12 of the present invention, (b) is a perspective view of a yoke coupling member of the flat permanent magnet type motor, and (c). () Is a side view of the yoke coupling member.
FIG. 22 is a longitudinal sectional view showing a flat permanent magnet type motor according to a thirteenth embodiment of the present invention with a lower half omitted.
FIG. 23 is a perspective view of a rotor core of the flat permanent magnet type motor.
FIG. 24 is a cross-sectional view of a conventional flat permanent magnet type motor.
FIG. 25 is an enlarged vertical cross-sectional view illustrating a lower half of the flat permanent magnet type motor.
FIG. 26 is an enlarged view of a portion A in FIG. 24;
FIG. 27 is an explanatory diagram showing a state of a magnetic flux in the flat permanent magnet type motor.
[Explanation of symbols]
21 Flat permanent magnet motor
22 Stator
23 Rotor
24 base
24a inner surface
24b protrusion
24c protrusion
25 Stator core
26 bobbins
26a tubular part
26b collar
27 winding
27a Outer side surface
27b Inner side surface
28 Yoke part
28a Dividing surface
28b convex part
28c recess
29 Bearing
30A First teeth part
30B 2nd teeth part
30A-1 inside
30A-2 recess
30B-1 inside
31 volts
32 Outer rotor part
32a inner surface
33 Inner rotor section
33a Outer surface
33b inner peripheral surface
34, 34A, 34B Base part
34a, 34A-1, 34B-1 inner surface
35,35A, 35B Rotor core
36 1st permanent magnet
37 2nd permanent magnet
41 1st iron piece
42 Second iron piece
43 Iron core
43a magnet hole
44 Iron Piece
45 Only the iron core
46 bobbins
46a tubular part
46b collar
46c lid
46d Part between the flange and the lid
47 insulating paper
47a end
48 Insulation tape
51, 52 slots
53 Yoke connecting member
53a hook part
53b Inner surface of end (tapered surface)

Claims

Having a stator and a rotor,
The stator includes a yoke portion in which a winding is wound vertically through an insulating material, a first tooth portion provided on an outer side of the yoke portion, and a second tooth provided on an inner side of the yoke portion. And a configuration having a stator core having a structure and a plate-shaped base for fixing the stator core,
The rotor has a structure in which an outer rotor portion located on the outer side of the stator core and an inner rotor portion located on the inner side of the stator core are protruded from a side surface of a disk-shaped base portion. A plurality of first permanent magnets are provided in the outer rotor portion in a circumferential direction of the iron core, and a plurality of second permanent magnets are provided in the inner rotor portion with respect to the first permanent magnets. A flat permanent magnet type rotating electric machine having a combined outer rotor / inner rotor configuration in which the same poles face each other in the circumferential direction of the iron core.

The flat permanent magnet type rotating electric machine according to claim 1,
A flat permanent magnet type rotating electric machine, wherein magnetic pole positions of the first permanent magnet and the second permanent magnet facing each other are shifted in a circumferential direction of an iron core.

The flat permanent magnet type rotating electric machine according to claim 1,
In the outer rotor portion, a first iron piece is provided instead of the first permanent magnet at a pole next to the pole provided with the first permanent magnet, and a pole next to the pole provided with the first iron piece is provided at the next pole. By providing the first permanent magnet, the first permanent magnet and the first iron piece are alternately arranged on the inner peripheral surface of the outer rotor portion in the iron core circumferential direction,
In the inner rotor portion, a second iron piece is provided in place of the second permanent magnet at a pole next to the pole provided with the second permanent magnet, and a second iron piece is provided next to the pole provided with the second permanent piece. A flat permanent magnet type wherein the second permanent magnets and the second iron pieces are alternately arranged on the outer peripheral surface of the inner rotor portion in the iron core circumferential direction by providing the second permanent magnets. Rotating electric machine.

The flat permanent magnet type rotating electric machine according to claim 1,
A flat permanent magnet type rotating electric machine wherein the second permanent magnet is embedded in an iron core in the inner rotor portion.

The flat permanent magnet type rotating electric machine according to claim 4,
In the outer rotor portion, an iron piece is provided instead of the first permanent magnet at a pole next to the pole provided with the first permanent magnet, and the first permanent magnet is provided at a pole next to the pole provided with the iron piece. By providing a magnet, the first permanent magnet and the iron piece are alternately arranged on the inner peripheral surface of the outer rotor portion in the iron core circumferential direction,
In the inner rotor portion, the pole next to the pole provided with the second permanent magnet is a portion of only the iron core having neither the second permanent magnet nor the magnet embedding hole. A flat permanent magnet type rotating electric machine having a structure in which a second permanent magnet is provided so that a portion in which the second permanent magnet is embedded and a portion of only the iron core alternately exist in a circumferential direction of the iron core.

The flat permanent magnet type rotating electric machine according to any one of claims 1 to 5,
A flat permanent magnet type rotating electric machine, wherein the stator core is divided by the yoke in the circumferential direction of the core, and the insulating material is provided in each of the divided yokes.

The flat permanent magnet type rotating electric machine according to claim 6,
The insulating material is a bobbin having a structure having a tubular portion and flanges protruding from both ends of the tubular portion, and extending the teeth-side flange of the bobbin outward or inward in the iron core radial direction. A flat permanent magnet type rotating electric machine, wherein the flange portion is configured to fit into a concave portion provided on an inner surface of the first tooth portion or the second tooth portion.

The flat permanent magnet type rotating electric machine according to any one of claims 1 to 7,
A flat permanent magnet type rotating electric machine, wherein a band-shaped insulating material is wound around the winding so as to cover the winding.

The flat permanent magnet type rotating electric machine according to claim 6,
The insulating material is a bobbin having a tubular portion and a structure having flanges protruding from both ends of the tubular portion, and a lid portion is provided integrally with the flange portion on one side of the bobbin, The flat permanent magnet type rotating electric machine, wherein the outer surface and the inner surface of the winding are covered with the lid.

The flat permanent magnet type rotating electric machine according to any one of claims 6 to 9,
A projecting portion is formed on one of the divided surfaces of the yoke portion divided in the iron core circumferential direction, and a concave portion is formed on the other divided surface, and the convex portion and the concave portion are fitted to each other to divide the yoke portion. A flat permanent magnet type rotating electric machine characterized in that it is configured to prevent displacement.

The flat permanent magnet type rotating electric machine according to any one of claims 7 to 10,
The bobbin is provided with a bobbin projection projecting in a circumferential direction of an iron core on a flange portion on a side opposite to a tooth, and configured so as to prevent the bobbin from shifting in the circumferential direction of the iron core by contacting the bobbin projections. Features Flat permanent magnet type rotating electric machine.

The flat permanent magnet type rotating electric machine according to any one of claims 6 to 9,
By fitting a U-shaped yoke coupling member formed at both ends with a hook portion hooked to the divided portion into the divided portion of the yoke portion divided in the iron core circumferential direction, the displacement of the divided portion of the yoke portion is prevented. A flat permanent magnet type rotating electric machine characterized by comprising.

The flat permanent magnet type rotating electric machine according to any one of claims 1 to 12,
A flat permanent magnet type rotating electric machine wherein the rotor core is divided into a rotor core on the outer rotor portion side and a rotor core on the inner rotor portion side.