JP2004104962A

JP2004104962A - Permanent magnet type reluctance rotary electric machine

Info

Publication number: JP2004104962A
Application number: JP2002266682A
Authority: JP
Inventors: Takao Hirano; 平野　恭男; Nobutake Aikura; 相倉　伸建; Akito Kondo; 近藤　明人; Masakazu Saka; 坂　政和; Nobuhiro Mizutani; 水谷　伸弘; Masakatsu Matsubara; 松原　正克; Sukeyasu Mochizuki; 望月　資康; Takashi Araki; 荒木　貴志
Original assignee: Toshiba Corp; Toshiba Industrial Products Manufacturing Corp
Current assignee: Toshiba Corp; Toshiba Industrial Products and Systems Corp
Priority date: 2002-09-12
Filing date: 2002-09-12
Publication date: 2004-04-02

Abstract

<P>PROBLEM TO BE SOLVED: To prevent drop in an output as much as possible which is caused by leakage of magnetic flux of a permanent magnet or demagnetization of the permanent magnet, in a permanent magnet type reluctance rotary electric machine. <P>SOLUTION: A pair of almost rectangular magnet insert holes 3 and 3 where the distance therebetween increases as reaching toward the outer periphery are formed on the outer peripheral part of a rotor core 2. Permanent magnets 4 and 4 are inserted and fixed in the pair of magnet insert holes 3 and 3. A plurality of voids 11 are formed in the rotor core 2 between the pair of permanent magnets 4 and 4. These voids 11 are composed of eight holes, in four rows, almost parallel to the permanent magnets 4 and 4. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、永久磁石を複合した永久磁石式リラクタンス型回転電機に関するものである。
【０００２】
【従来の技術】
永久磁石式リラクタンス型回転電機は、磁束が通り易い部分（ｄ軸と称する）と磁束が通り難い部分（ｑ軸と称する）とが形成され（所謂磁気的凹凸が形成され）、且つ、永久磁石を有する回転子を備えており、回転子は、固定子巻線が施された固定子内に配置されている。そして、回転子においては、磁気抵抗の小さい部分（ｄ軸）では空隙磁束密度が高く、磁気抵抗の大きい部分（ｑ軸）では空隙磁束密度が小さくなり、この磁束密度の変化によってリラクタンストルクが発生し、又、永久磁石と固定子の磁極との間の磁気吸引力及び磁気反発力によってもトルクが発生する。
【０００３】
図３０は従来の永久磁石式リラクタンス型回転電機の回転子の一例を示すもので、８極の場合ある。即ち、回転子１は、円環状の多数の珪素鋼板を積層してなる回転子鉄心２を有する。回転子鉄心２の外周部には、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部３、３が形成されており（従って、一対の磁石挿入孔部３、３は、外周側からみてハ字形になっている。）、この一対の磁石挿入孔部３、３に永久磁石４、４が挿入されて接着により固定されている。更に、回転子鉄心２の外周部には、一対の永久磁石４、４間に位置して空洞部５が形成されており、この空洞部５は、一対の永久磁石４、４に平行な二辺部と外周に沿う辺部とを有する略三角形状をなしている。そして、回転子１において、一対の磁石挿入孔部３、３及び永久磁石４、４並びに空洞部５が設けられた部分６が磁束の通り難い部分（ｑ軸）であり、部分６、６間の部分７が磁極たる磁束の通り易い部分（ｄ軸）である。この回転子１は、固定子巻線が施された図示しない回転子内に配置されるようになっている。
【０００４】
【発明が解決しようとする課題】
上記従来に構成では、回転子鉄心２において、一対の磁石挿入孔部３、３（一対の永久磁石４、４）の内周側端部間にブリッジ部８が必然的に形成されるとともに、一対の磁石挿入孔部３、３（一対の永久磁石４、４）の外周側端部と外周との間にチップ部９が必然的に形成される。このため、永久磁石４の磁束がこのブリッジ部８、チップ部９を通ってＮ極からＳ極に漏洩し、それだけ固定子の磁極に作用する分が少なくなって出力が低下する問題がある。
又、固定子巻線からの逆極性の磁束が永久磁石４を通ると特にその端部にでも通ると、永久磁石４に減磁作用が生じて、これにより出力が低下する問題があった。
【０００５】
本発明は上述の事情に鑑みてなされたものであり、その目的は、永久磁石の磁束漏洩もしくは永久磁石の減磁作用による出力の低下を極力防止することができるを永久磁石式リラクタンス型回転電機を提供することにある。
【０００６】
【課題を解決するための手段】
請求項１記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられ、永久磁石に略平行な複数個の空洞部とを備えて構成されていることを特徴とする。
【０００７】
このような構成によれば、固定子巻線からの磁束が複数個の空洞部により永久磁石を通ることを極力阻止されるようになり、従って、永久磁石の減磁作用による出力の低下を極力防止することができる。
【０００８】
請求項２記載の永久磁石式リラクタンス型回転電機は、空洞部は更に細分化されていることを特徴とする。このような構成によっても、請求項１と同様の効果が得られる。
【０００９】
請求項３記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられ、各永久磁石に略平行な辺部と外周に沿う辺部とを有する略三角形状の空洞部と、前記回転子鉄心に設けられ、各永久磁石のブリッジ部側端部及びチップ部側端部に位置し且つ前記空洞部側に位置する複数個の孔部とを備えて構成されていることを特徴とする。
【００１０】
このような構成によれば、固定子巻線からの磁束が複数個の孔部により永久磁石の端部を通ることを極力阻止されるようになり、従って、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００１１】
請求項４記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられ、各永久磁石に略平行な辺部と外周に沿う辺部とを有し前記一対の永久磁石の一方に近接する略三角形状の空洞部とを備えて構成されていることを特徴とする。
【００１２】
このような構成によれば、固定子巻線からの磁束が空洞部によりこれと近接する側の永久磁石を通ることを極力阻止されるようになり、従って、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００１３】
請求項５記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、両辺部が外周に向かうに従って拡開する略Ｖ字形の磁石挿入孔部と、この磁石挿入孔部にこれに沿うように挿入固定された永久磁石と、前記回転子鉄心に前記永久磁石の両辺部間に位置して設けられた空洞部とを備えて構成されていることを特徴とする。
【００１４】
このような構成によれば、磁石挿入孔部が略Ｖ字形をなすともに、この磁石挿入孔部に挿入される永久磁石も略Ｖ字形をなすので、永久磁石の内周側に磁束漏洩の原因となる端部が形成されないばかりか、回転子鉄心に磁束漏洩路となるブリッジ部も形成されないので、磁束漏洩による出力の低下を極力防止することができる。
【００１５】
請求項６記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、両辺部が外周に向かうに従って拡開する略Ｖ字形の磁石挿入孔部と、この磁石挿入孔部の両辺部に挿入固定された一対の永久磁石と、前記回転子鉄心に前記永久磁石の両辺部間に位置して設けられた空洞部とを備えて構成されていることを特徴とする。
【００１６】
このような構成によれば、回転子鉄心に磁束漏洩路となるブリッジ部が形成されないので、磁束漏洩による出力の低下を極力防止することができる。
【００１７】
請求項７記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、両辺部が外周に向かうに従って拡開し且つその両辺部の外周側端部が開放する略Ｖ字形の磁石挿入孔部と、この磁石挿入孔部の両辺部に挿入固定された一対の永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成されていることを特徴とする。
【００１８】
このような構成によれば、回転子鉄心における永久磁石の両端部側に磁束漏洩路となるブリッジ部及びチップ部が形成されないので、磁束漏洩による出力の低下を極力防止することができる。
【００１９】
請求項８記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、両辺部が外周に向かうに従って拡開し且つその両辺部の外周側端部が開放する略Ｖ字形の磁石挿入孔部と、この磁石挿入孔部の両辺部に挿入固定された一対の永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置してその回転子鉄心を貫通するようにして設けられ、前記回転子鉄心の両端板に支持された支え棒とを備えて構成されていることを特徴とする。このような構成によっても、請求項７と同様の効果が得られる。
【００２０】
請求項９記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対抗距離が順次大となり且つ外周側端部が開放する略長方形状の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成されていることを特徴とする。
【００２１】
このような構成によれば、回転子鉄心における永久磁石の外周側の端部側に磁束漏洩路となるチップ部が形成されないので、磁束漏洩による出力の低下を極力防止することができる。
【００２２】
請求項１０記載の永久磁石式リラクタンス型回転電機は、一対の磁石挿入孔部の開放端部に磁石の端部を係止する係止突部を有することを特徴とする。このような構成によっても、請求項８と同様の効果を得ることができる。
【００２３】
請求項１１記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成され、
前記磁石挿入孔部及び永久磁石は、内周側に向かうに従ってその永久磁石の厚み寸法が大になるように構成されていることを特徴とする。
【００２４】
このような構成によれば、固定子巻線からの磁束は、永久磁石をその内周側に向かうほど通りにくくなるので、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００２５】
請求項１２記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成され、
前記磁石挿入孔部及び永久磁石は、外周側に向かうに従ってその永久磁石の厚み寸法が大になるように構成されていることを特徴とする。
【００２６】
このような構成によれば、固定子巻線からの磁束は、永久磁石をその外周側に向かうほど通りにくくなるので、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００２７】
請求項１３記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成され、
前記磁石挿入孔部及び永久磁石は、その永久磁石の両端部の厚み寸法が他の部位より大になるように構成されていることを特徴とする。
【００２８】
このような構成によれば、固定子巻線からの磁束は、永久磁石の両端部を通りにくくなるので、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００２９】
請求項１４記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成され、
前記磁石挿入孔部及び永久磁石は、その永久磁石が主磁石とその両端部に位置してこれよりも厚み寸法が大になる端部磁石とからなるように構成されていることを特徴とする。このような構成によっても、請求項１３と同様の効果を得ることができる。
【００３０】
請求項１５記載の永久磁石式リラクタンス型回転電機は、固定子巻線を有する固定子と、回転子鉄心を有する回転子とを具備し、
前記回転子は、前記回転子鉄心の外周部に設けられ、外周に向かうに従って対向距離が順次大となる略長方形の一対の磁石挿入孔部と、これらの一対の磁石挿入孔部に挿入固定された永久磁石と、前記回転子鉄心に前記一対の永久磁石間に位置して設けられた空洞部とを備えて構成され、
前記一対の磁石挿入孔部及び永久磁石は、一方の永久磁石が他方の永久磁石よりも厚み寸法が大になるように構成されていることを特徴とする。
【００３１】
このような構成によれば、固定子巻線からの磁束は、厚み寸法の大なる一方の永久磁石を通りにくくなるので、永久磁石の減磁作用による出力の低下を極力防止することができる。
【００３２】
【発明の実施の形態】
（第１の実施例）
以下、本発明の第１の実施例について、図１及び図２を参照して説明するに、図２は、本実施例の永久磁石式リラクタンス型回転電機の構成を示す径方向断面図、図１は、その回転子の部分拡大断面図であり、図３０と同一部分には同一符号を付して説明を省略する。
【００３３】
図１及び図２において、回転子１０は、回転子鉄心２に一対の永久磁石４、４間に位置して複数個の空洞部１１が形成されている構成に特徴を有する。この空洞部１１は、永久磁石４、４に略平行な各４列計８個の孔部からなる。そして、回転子１０において、一対の磁石挿入孔部３、３及び永久磁石４、４並びに空洞部１１が設けられた部分１２が磁束の通り難い部分（ｑ軸）である。
図２において、固定子１３は、円環状の多数の珪素鋼板を積層してなる固定子鉄心１４のスロット１５内に固定子巻線１６を収納して構成されている。そして、この固定子１３内に回転子１０が配置されている。
【００３４】
しかして、回転子１０には、磁束が通り難い部分（ｑ軸）１２と磁束が通り易い部分（ｄ軸）７とが形成されている（所謂磁気的凹凸が形成されている）ので、これらの部分１２及び７上の空隙部分で、固定子巻線１６に電流を流すことにより蓄えられる磁気エネルギーが異なり、この磁気エネルギーの変化によりリラクタンストルクが発生する。また、回転子１０には、永久磁石４、４も設けられているので、永久磁石４、４と固定子１３の磁極との間の磁気吸引力及び磁気反発力によってもトルクが発生する。これにより、回転子１０が回転するようになる。
【００３５】
このような本実施例によれば、固定子巻線１６からの磁束が複数個の空洞部１１により永久磁石４を通ることを極力阻止されるようになり、従って、永久磁石４の減磁作用による出力の低下を極力防止することができる。また、複数個の空洞部１１により部分（ｑ軸）１２の磁束の通り難さが著しくなり、従って、突極比が増してリラクタンストルクが増大し、出力が増大する。しかも、複数個の空洞部１１の中央部に鉄心部分が存在するので、回転子１０の遠心強度を上げることができる。
【００３６】
（第２の実施例）
図３は本発明の第２の実施例を示すもので、図１と異なるところは、回転子鉄心２に、空洞部１１を更に細分化して１０個の孔部からなる空洞部１７が形成されていて、磁束の通り難い部分（ｑ軸）１８とされ、以て、回転子１９が構成されている。
この第２の実施例によっても、上記第１の実施例と同様の効果を得ることができるものである。
【００３７】
（第３の実施例）
図４は本発明の第３の実施例を示すもので、図３０と異なるところは、回転子鉄心２に、一対の永久磁石４、４のブリッジ部８側端部及びチップ部９側端部に位置し且つ前記空洞部５側に位置する複数個たる４個の孔部２０が形成されていて、磁束の通り難い部分（ｑ軸）２１とされ、以て、回転子２２が構成されている。
このような第３の実施例によれば、固定子巻線１６（図２参照）からの磁束が４個の孔部２０により永久磁石４、４の端部を通ることを極力阻止されるようになり、従って、永久磁石４、４の減磁作用による出力の低下を極力防止することができる。
【００３８】
（第４の実施例）
図５及び図６は本発明の第４の実施例を示すもので、図３０と異なるところは、回転子鉄心２に、空洞部５と同様の略三角形状の空洞部２３が一対の永久磁石４、４の一方に永久磁石４に近接するように形成されていて、磁束の通り難い部分（ｑ軸）２４とされ、以て、回転子２５が構成されている。
【００３９】
しかして、回転子２５は、磁束の通り難い部分（ｑ軸）２４と磁束が通り易い部分（ｄ軸）７とによりリラクタンストルクが作用するとともに、永久磁石４と固定子１３においてＮ極とＮ極とは反発し且つＮ極とＳ極とは吸引しあうことにより磁気的トルクが作用して、矢印方向（反時計方向）に回転する（図６参照）。この場合、永久磁石４に極に固定子３の同じ極が相対的に近づくと、その磁束により永久磁石４は減磁作用を受ける。以上のことは、第１ないし第３の実施例でも同様である。
【００４０】
しかるに、この第４のに実施例においては、空洞部２３が一対の永久磁石４、４の一方すなわち時計方向側の永久磁石４に近接するように形成されているので、固定子巻線１６（図２参照）からの磁束がその空洞部２３により一方の永久磁石４を通り難くなり、したがって、永久磁石４の減磁作用による出力の低下を極力防止することができる。
【００４１】
（第５の実施例）
図７は本発明の第５の実施例を示すもので、図３０と異なるところは、回転子鉄心２に、一対の磁石挿入孔部３、３の代わりに、磁石挿入孔部３、３を両辺部とし且つブリッジ部８部分で連続する略Ｖ字形の磁石挿入孔部２６が形成され、この磁石挿入孔部２６にこれに沿うようにして略Ｖ字形の永久磁石２７が挿入されて接着により固定されて、磁束の通り難い部分（ｑ軸）２８とされ、以て、回転子２９が構成されている。
【００４２】
このような第５の実施例によれば、磁石挿入孔部２６が略Ｖ字形をなすともに、この磁石挿入孔部２６に挿入される永久磁石２７も略Ｖ字形をなすので、永久磁石２７の内周側に磁束漏洩の原因となる端部が形成されないばかりか、回転子鉄心２に磁束漏洩路となるブリッジ部８も形成されないので、磁束漏洩による出力の低下を極力防止することができる。
【００４３】
（第６の実施例）
図８は本発明の第６の実施例を示すもので、図７及び図３０と異なるところは、回転子鉄心２に、略Ｖ字形の磁石挿入孔部２６の両辺部に一対の永久磁石４、４が挿入されて接着により固定されて、磁束の通り難い部分（ｑ軸）３０が形成され、以て、回転子３１が構成されている。
この第６に実施例によれば、永久磁石４、４の内周側に端部が形成されてはいるが、回転子鉄心２に磁束漏洩路となるブリッジ部８が形成されないので、請求項５と同様の効果を奏する。
【００４４】
（第７の実施例）
図９は本発明の第７の実施例を示すもので、図８と異なるところは、回転子鉄心２に、磁石挿入孔部２６の代わりに、両辺部の外周側端部が開放する（すなわち、チップ部９、９が存在しない）略Ｖ字形の磁石挿入孔部３２が形成されて、磁束の通り難い部分（ｑ軸）３３が形成され、以て、回転子３４が構成されている。この場合、永久磁石４、４を磁石挿入孔部３２に固定する接着剤としては、他の実施例で用いる接着剤よりも接着力が大で、且つ、経年劣化の極めて少ないものを用いるものとする。
この第７の実施例によれば、回転子鉄心２に磁束漏洩路となるチップ部９、９も形成されていないので、上記第７の実施例に比し、永久磁石４の磁束漏洩を一層阻止することができて、出力の低下を一層防止することができる。
【００４５】
（第８の実施例）
図１０は本発明の第８の実施例を示すもので、図９と異なるところは、回転子鉄心２に、空洞部５の代わりに、円形状の空洞部３５が形成されているとともに、この空洞部３５にこれを貫通するように非磁性材製の支え棒３６が嵌合若しくは圧入され、この支え棒３６は、回転子鉄心２の両端板に支持されて、磁束の通り難い部分（ｑ軸）３７が形成され、以て、回転子３８が構成されている。尚、部分３７には、部分３７を構成する積層鉄心を結束するかしめ部３９が形成されている。
このような第８の実施例によれば、上記第７の実施例と同様の効果が得られるとともに、支え棒３６により遠心強度を増すことができ、また、かしめ部３９により部分３７の積層鉄心を結束できるので、組立て性もよくなる。
尚、かしめ部３９は必要に応じて設ければよい。
【００４６】
（第９の実施例）
図１１は本発明の第９の実施例を示すもので、図３０と異なるところは、回転子鉄心２に、磁石挿入孔部３、３の代わりに、両辺部の外周側端部が開放する（すなわち、チップ部９、９が存在しない）磁石挿入孔部４０、４０が形成されて、磁束の通り難い部分（ｑ軸）４１が形成され、以て、回転子４２が構成されている。
この第９の実施例によれば、回転子鉄心２に磁束漏洩路となるチップ部９、９も形成されていないので、永久磁石４の磁束漏洩を阻止することができて、出力の低下を極力防止することができる。
【００４７】
（第１０の実施例）
図１２は本発明の第１０の実施例を示すもので、図１１と異なるところは、磁石挿入孔部４０、４０の外周側の開放端部に、永久磁石４、４の外周側端面に係止する係止突起４３、４３が形成されており、以て、回転子４４が構成されている。
このような第１０の実施例によれば、上記第９の実施例と同様の効果を得ることができるとともに、回転子４４の回転時に永久磁石４に遠心力が作用しても、係止突起４３により永久磁石４の抜止めが行われる。
【００４８】
（第１１の実施例）
図１３は本発明の第１１の実施例を示すもので、図３０と異なるところは、回転子鉄心２に、磁石挿入孔部３、３の代わりに、内周側に向かうに従って幅寸法が順次大になる磁石挿入孔部４５、４５が形成され、これらの磁石挿入孔部４５、４５に内周側に向かうに従って厚み寸法が順次大となる永久磁石４６、４６が挿入されて接着により固定されて、磁束の通り難い部分（ｑ軸）４７が形成され、以て、回転子４８が構成されている。
このような第１１の実施例によれば、固定子巻線１６（図２参照）からの磁束は、永久磁石４７をその内周側に向かうほど通りにくくなるので、永久磁石４６の減磁作用による出力の低下を極力防止することができる。
【００４９】
（第１２の実施例）
図１４は本発明の第１２の実施例を示すもので、図１３と異なるところは、回転子鉄心２に、磁石挿入孔部４５、４５の代わりに、外周側に向かうに従って幅寸法が順次大になる磁石挿入孔部４９、４９が形成され、これらの磁石挿入孔部４９、４９に外周側に向かうに従って厚み寸法が順次大となる永久磁石５０、５０が挿入されて接着により固定されて、磁束の通り難い部分（ｑ軸）５１が形成され、以て、回転子５２が構成されている。
このような第１２の実施例によれば、固定子巻線１６（図２参照）からの磁束は、永久磁石５０をその外周側に向かうほど通りにくくなるので、永久磁石５０の減磁作用による出力の低下を極力防止することができる。
【００５０】
（第１３の実施例）
図１５は本発明の第１３の実施例を示すものであり、図３０と異なるところは、回転子鉄心２に、磁石挿入孔部３、３の代わりに、両端部の幅寸法が他の部位より大なる磁石挿入孔部５３、５３が形成され、これらの磁石挿入孔部５３、５３に両端部の厚み寸法が他の部位より大なる永久磁石５４、５４が挿入固定されて、磁束の通り難い部分（ｑ軸）５５が形成され、以て、回転子５６が構成されている。
このような第１３の実施例によれば、固定子巻線１６（図２参照）からの磁束は、永久磁石５４の両端部を通りにくくなるので、永久磁石５４の減磁作用による出力の低下を極力防止することができる。
【００５１】
（第１４の実施例）
図１６は本発明の第１４の実施例を示すものであり、図１５と異なるところは、回転子鉄心２の磁石挿入孔部５３、５３に、永久磁石５４、５４、の代わりに、主磁石５７ａとその両端部に位置してこれよりも厚み寸法が大になる端部磁石５７ｂ、５７ｂとからなる永久磁石５７、５７が挿入固定されて、磁束の通り難い部分（ｑ軸）５８が形成され、以て、回転子５９が構成されている。
このような第１４の実施例によっても、上記第１３の実施例と同様の効果を奏する。
【００５２】
（第１５の実施例）
図１７は本発明の第１５の実施例を示すものであり、図３０と異なるところは、回転子鉄心２に、一対の磁石挿入孔部３、３のうちの一方たる時計方向側の磁石挿入孔部３の代わりに、これよりも幅寸法の大なる磁石挿入孔部６０が形成され、子の磁石挿入孔部６０に永久磁石４よりも厚み寸法の大なる永久磁石６１が挿入固定されて、磁束の通り難い部分（ｑ軸）６２が形成され、以て、回転子６３が構成されている。
このような第１５の実施例によれば、固定子巻線１６（図２参照）からの磁束は、永久磁石６１を通りにくくなるので、永久磁石６１の減磁作用による出力の低下を極力防止することができる。
【００５３】
尚、図１８ないし図２９は、本発明の開発途中の段階で提案された構成例であり、以下これらを参考例として説明するに、図１ないし図１７、図３０のいずれかと同一部分には同一符号を付して示す。
【００５４】
（第１の参考例）
図１８は第１の参考例を示すもので、これは、一対の永久磁石４、４間に、これらと平行な辺部を有する二条のＶ字形の空洞部６４と、逆三角形状の空洞部６５とが形成された構成である。
【００５５】
（第２の参考例）
図１９は第２の参考例を示すもので、これは、図１８に示す空洞部６４、６５の代わりに、これらの中央角部に丸みを持たせた状態の空洞部６６、６７が設けられた構成である。
【００５６】
（第３の参考例）
図２０は第３の参考例を示すもので、これは、図３０に示すチップ部９、９に相当する部位に切欠部６８、６８が形成された構成である。
【００５７】
（第４の参考例）
図２１は第４の参考例を示すもので、これは、図３０に示すチップ部９、９に相当する部位に三角形状の孔部６９、６９が形成された構成である。
【００５８】
（第５の参考例）
図２２は第５の参考例を示すもので、これは、図３０に示すチップ部９、９に相当する部位に切欠部６８、６８が形成されているとともに、ブリッジ部８に相当する部位に三角形状の孔部７０が形成された構成である。
【００５９】
（第６の参考例）
図２３は第６の参考例を示すもので、これは、図３０に示すチップ部９、９に相当する部位に三角形状の孔部６９、６９が形成されているとともに、ブリッジ部８に相当する部位に三角形状の孔部７０が形成された構成である。
【００６０】
（第７の参考例）
図２４は第７の参考例を示すもので、これは、磁石挿入孔部３、３に、図３０に示すブリッジ８、８に相当する部位に位置して内周側に延びる補助孔部３ａ、３ａが設けられているとともに、チップ部９、９に相当する部位に位置して外周側に延びる補助孔部３ｂ、３ｂが設けられ、更に、補助孔部３ａ、３ａおよび３ｂ、３ｂに、永久磁石４、４の端面に係止する係止突起７１、７１および７２、７２が形成された構成である。
【００６１】
（第８の参考例）
図２５は第８の参考例を示すもので、これは、補助孔部３ｂ、３ｂに、図２３に示す係止突起７２、７２の代わりに、永久磁石４の端面に係止突起７２、７２とは反対側から係止する係止突起７３、７３が形成された構成である。
【００６２】
（第９の参考例）
図２６は第９の参考例を示すもので、これは、図２４において、補助孔部３ａ、３ａに、永久磁石４、４の端面に係止突起７１、７１とは反対側から係止する係止突起７４、７４が更に形成された構成である。
【００６３】
（第１０の参考例）
図２７は第１０の参考例を示すもので、これは、角補助孔部３ａおよび３ｂに係止突起７１、７４および７２、７３が形成された構成である。
【００６４】
（第１１の参考例）
図２８は第１１の参考例を示すもので、これは、回転子鉄心２に、略三角形状の空洞部２３ａが一対の永久磁石４、４の一方の永久磁石４に近接するように形成されていている部分２４ａと、略三角形状の空洞部２３ｂが一対の永久磁石４、４の他方の永久磁石４に近接するように形成されていている部分２４ｂとが交互に形成された構成である。
【００６５】
（第１２の参考例）
図２９は第１２の参考例を示すもので、これは、部分６、６間のピッチが交互に大小となるように（したがって、部分７、７間のピッチも交互に大小になるように）した構成である。
【００６６】
尚、本発明は上記しかつ図面に示す実施例にのみ限定されるものではなく、例えば、各実施例では永久磁石を磁石挿入孔部に接着により固定するようにしたが、代わりに圧入により固定してもよい等、要旨を逸脱しない範囲内で適宜変形して実施し得ることは勿論である。
【００６７】
【発明の効果】
以上説明したように、本発明の永久磁石式リラクタンス型回転電機は、永久磁石の磁束漏洩もしくは永久磁石の減磁作用による出力の低下を極力防止することができるという効果を奏する。
【図面の簡単な説明】
【図１】本発明の第１の実施例を示す腰部の拡大断面図
【図２】全体の断面図
【図３】本発明の第２の実施例を示す図１相当図
【図４】本発明の第３の実施例を示す図１相当図
【図５】本発明の第４の実施例を示す図１相当図
【図６】作用説明用の図２相当図
【図７】本発明の第５の実施例を示す図１相当図
【図８】本発明の第６の実施例を示す図１相当図
【図９】本発明の第７の実施例を示す図１相当図
【図１０】本発明の第８の実施例を示す図１相当図
【図１１】本発明の第９の実施例を示す図１相当図
【図１２】本発明の第１０の実施例を示す図１相当図
【図１３】本発明の第１１の実施例を示す図１相当図
【図１４】本発明の第１２の実施例を示す図１相当図
【図１５】本発明の第１３の実施例を示す図１相当図
【図１６】本発明の第１４の実施例を示す図１相当図
【図１７】本発明の第１５の実施例を示す図１相当図
【図１８】第１の参考例を示す図１相当図
【図１９】第２の参考例を示す図１相当図
【図２０】第３の参考例を示す図１相当図
【図２１】第４の参考例を示す図１相当図
【図２２】第５の参考例を示す図１相当図
【図２３】第６の参考例を示す図１相当図
【図２４】第７の参考例を示す図１相当図
【図２５】第８の参考例を示す図１相当図
【図２６】第９の参考例を示す図１相当図
【図２７】第１０の参考例を示す図１相当図
【図２８】第１１の参考例を示す図２相当図
【図２９】第１２の参考例を示す図２相当図
【図３０】従来例を示す回転子の断面図
【符号の説明】
図面中、２は回転子鉄心、３は磁石挿入孔部、４は永久磁石、５は空洞部、８はブリッジ部、９はチップ部、１０は回転子、１１は空洞部、１３は固定子、１４は固定子鉄心、１６は固定子巻線、１７および１８は空洞部、１９は回転子、２０は孔部、２２は回転子、２３は空洞部、２５は回転子、２６は磁石挿入孔部、２７は永久磁石、２９および３１は回転子、３２は磁石挿入孔部、３４は回転子、３５は空洞部、３６は支え棒、３８は回転子、４０は磁石挿入孔部、４２は回転子、４３は係止突起、４４は回転子、４５は磁石挿入孔部、４６は永久磁石、４８は回転子、４９は磁石挿入孔部、５０は永久磁石、５２は回転子、５３は磁石挿入孔部、５４は永久磁石、５６は回転子、５７は永久磁石、５７ａは主磁石、５７ｂは端部磁石、５９は回転子、６０は磁石挿入孔部、６１は永久磁石、６３は回転子を示す。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a permanent magnet type reluctance type rotating electric machine combining permanent magnets.
[0002]
[Prior art]
The permanent magnet type reluctance type rotary electric machine has a portion through which magnetic flux easily passes (referred to as d-axis) and a portion through which magnetic flux does not pass easily (referred to as q-axis) (so-called magnetic irregularities are formed). , And the rotor is disposed in the stator on which the stator windings are provided. In the rotor, the air gap magnetic flux density is high in a portion having a small magnetic resistance (d-axis), and the air gap magnetic flux density is low in a portion having a large magnetic resistance (q-axis). In addition, a torque is also generated by a magnetic attraction force and a magnetic repulsion force between the permanent magnet and the magnetic pole of the stator.
[0003]
FIG. 30 shows an example of a rotor of a conventional permanent magnet type reluctance type rotating electric machine, which has eight poles. That is, the rotor 1 has a rotor core 2 formed by laminating a number of annular silicon steel plates. A pair of substantially rectangular magnet insertion holes 3, 3 are formed in the outer peripheral portion of the rotor core 2 so that the opposing distances are gradually increased toward the outer periphery (accordingly, the pair of magnet insertion holes 3, 3). Are shaped like a letter C when viewed from the outer peripheral side.) The permanent magnets 4, 4 are inserted into the pair of magnet insertion holes 3, 3, and are fixed by bonding. Further, a hollow portion 5 is formed in the outer peripheral portion of the rotor core 2 between the pair of permanent magnets 4, 4. It has a substantially triangular shape having sides and sides along the outer periphery. In the rotor 1, the portion 6 where the pair of magnet insertion holes 3 and 3 and the permanent magnets 4 and 4 and the cavity 5 are provided is a portion (q axis) where it is difficult for magnetic flux to pass therethrough. Is a portion (d-axis) where the magnetic flux as a magnetic pole easily passes. The rotor 1 is arranged in a rotor (not shown) on which a stator winding is provided.
[0004]
[Problems to be solved by the invention]
In the above-described conventional configuration, in the rotor core 2, the bridge portion 8 is inevitably formed between the inner peripheral ends of the pair of magnet insertion holes 3, 3 (the pair of permanent magnets 4, 4). The tip portion 9 is inevitably formed between the outer periphery and the outer periphery of the pair of magnet insertion holes 3 and 3 (the pair of permanent magnets 4 and 4). For this reason, the magnetic flux of the permanent magnet 4 leaks from the N pole to the S pole through the bridge section 8 and the tip section 9, and there is a problem that the amount acting on the magnetic pole of the stator is reduced and the output is reduced.
In addition, when a magnetic flux of the opposite polarity from the stator winding passes through the permanent magnet 4, especially when it passes through the end thereof, a demagnetizing effect is generated in the permanent magnet 4, thereby causing a problem that the output is reduced.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a permanent magnet type reluctance type rotating electric machine which can prevent a magnetic flux from leaking from a permanent magnet or a decrease in output due to a demagnetizing action of the permanent magnet. Is to provide.
[0006]
[Means for Solving the Problems]
The permanent magnet type reluctance type rotating electric machine according to claim 1 includes a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. And a plurality of cavities provided on the rotor core between the pair of permanent magnets and substantially parallel to the permanent magnets.
[0007]
According to such a configuration, the magnetic flux from the stator winding is prevented from passing through the permanent magnet by the plurality of cavities as much as possible. Therefore, the output reduction due to the demagnetizing action of the permanent magnet is minimized. Can be prevented.
[0008]
The permanent magnet type reluctance type rotating electric machine according to claim 2 is characterized in that the cavity is further subdivided. With such a configuration, the same effect as that of the first aspect can be obtained.
[0009]
The permanent magnet type reluctance type rotating electric machine according to claim 3 includes a stator having a stator winding, and a rotor having a rotor core.
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet, a substantially triangular hollow portion provided between the pair of permanent magnets in the rotor core and having sides substantially parallel to each permanent magnet and sides along the outer periphery; The permanent magnet is provided on the rotor core, and is provided with a plurality of holes located on the bridge-side end and the tip-side end of each permanent magnet and located on the cavity side. I do.
[0010]
According to such a configuration, the magnetic flux from the stator winding is prevented as much as possible from passing through the end of the permanent magnet by the plurality of holes, and therefore, the output of the permanent magnet due to the demagnetizing action is reduced. Reduction can be prevented as much as possible.
[0011]
The permanent magnet type reluctance type rotating electric machine according to claim 4 includes a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. Permanent magnets, provided on the rotor core between the pair of permanent magnets, and having a side portion substantially parallel to each permanent magnet and a side portion along the outer periphery, one of the pair of permanent magnets. And a substantially triangular cavity adjacent thereto.
[0012]
According to such a configuration, the magnetic flux from the stator winding is prevented as much as possible from passing through the permanent magnet on the side adjacent to the cavity, and therefore, the output due to the demagnetizing action of the permanent magnet is reduced. Reduction can be prevented as much as possible.
[0013]
The permanent magnet type reluctance type rotating electric machine according to claim 5 includes a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on the outer peripheral portion of the rotor core, and has a substantially V-shaped magnet insertion hole portion whose both sides expand toward the outer periphery, and is inserted and fixed along the magnet insertion hole portion. And a hollow portion provided in the rotor core between both sides of the permanent magnet.
[0014]
According to such a configuration, the magnet insertion hole is substantially V-shaped, and the permanent magnet inserted into the magnet insertion hole is also substantially V-shaped. In addition to the fact that no end portion is formed, a bridge portion serving as a magnetic flux leakage path is not formed in the rotor core, so that a decrease in output due to magnetic flux leakage can be prevented as much as possible.
[0015]
The permanent magnet type reluctance type rotating electric machine according to claim 6 includes a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a substantially V-shaped magnet insertion hole portion whose both sides expand toward the outer periphery, and a pair of magnet insertion holes fixed to both sides of the magnet insertion hole portion. And a hollow portion provided in the rotor core between both sides of the permanent magnet.
[0016]
According to such a configuration, since a bridge portion serving as a magnetic flux leakage path is not formed in the rotor core, a decrease in output due to magnetic flux leakage can be prevented as much as possible.
[0017]
The permanent magnet type reluctance type rotating electric machine according to claim 7 includes a stator having a stator winding and a rotor having a rotor core,
A substantially V-shaped magnet insertion hole portion provided on an outer peripheral portion of the rotor core, with both sides expanding toward the outer periphery, and with outer peripheral ends of the both sides being open; The rotor core is provided with a pair of permanent magnets inserted and fixed to both sides of the insertion hole, and a cavity provided in the rotor core between the pair of permanent magnets. .
[0018]
According to such a configuration, since the bridge portion and the tip portion serving as magnetic flux leakage paths are not formed on both ends of the permanent magnet in the rotor core, a decrease in output due to magnetic flux leakage can be prevented as much as possible.
[0019]
The permanent magnet type reluctance type rotating electric machine according to claim 8, comprising a stator having a stator winding and a rotor having a rotor core,
A substantially V-shaped magnet insertion hole portion provided on an outer peripheral portion of the rotor core, with both sides expanding toward the outer periphery, and with outer peripheral ends of the both sides being open; A pair of permanent magnets inserted and fixed to both sides of the insertion hole, and provided on the rotor core so as to be located between the pair of permanent magnets and penetrate the rotor core, And a support rod supported by both end plates. With such a configuration, the same effect as that of the seventh aspect can be obtained.
[0020]
The permanent magnet type reluctance type rotating electric machine according to claim 9 includes a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on the outer peripheral portion of the rotor core, the opposing distance is gradually increased toward the outer periphery, and a pair of substantially rectangular magnet insertion holes whose outer end is opened, and a pair of these magnet insertion holes. It is characterized by comprising a permanent magnet inserted and fixed in a magnet insertion hole, and a cavity provided in the rotor core between the pair of permanent magnets.
[0021]
According to such a configuration, since a tip portion serving as a magnetic flux leakage path is not formed at the outer peripheral end of the permanent magnet in the rotor core, a decrease in output due to magnetic flux leakage can be prevented as much as possible.
[0022]
According to a tenth aspect of the present invention, there is provided a permanent magnet type reluctance type rotating electric machine characterized in that an open end of a pair of magnet insertion holes has a locking projection for locking an end of a magnet. With such a configuration, the same effect as the eighth aspect can be obtained.
[0023]
The permanent magnet type reluctance type rotating electric machine according to claim 11, comprising a stator having a stator winding, and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet and a cavity provided in the rotor core between the pair of permanent magnets,
The magnet insertion hole and the permanent magnet are configured such that the thickness dimension of the permanent magnet increases toward the inner peripheral side.
[0024]
According to such a configuration, it becomes more difficult for the magnetic flux from the stator winding to pass through the permanent magnet toward the inner peripheral side, so that a decrease in output due to the demagnetizing action of the permanent magnet can be prevented as much as possible.
[0025]
The permanent magnet type reluctance type rotating electric machine according to claim 12, comprising a stator having a stator winding, and a rotor having a rotor iron core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet and a cavity provided in the rotor core between the pair of permanent magnets,
The magnet insertion hole and the permanent magnet are configured such that the thickness dimension of the permanent magnet increases toward the outer peripheral side.
[0026]
According to such a configuration, it becomes more difficult for the magnetic flux from the stator winding to pass through the permanent magnet toward the outer periphery thereof, so that a decrease in output due to the demagnetizing action of the permanent magnet can be prevented as much as possible.
[0027]
A permanent magnet type reluctance type rotating electric machine according to claim 13, comprising a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet and a cavity provided in the rotor core between the pair of permanent magnets,
The magnet insertion hole portion and the permanent magnet are characterized in that the thickness dimension of both ends of the permanent magnet is larger than other portions.
[0028]
According to such a configuration, it is difficult for the magnetic flux from the stator winding to pass through both ends of the permanent magnet, so that a decrease in output due to the demagnetizing action of the permanent magnet can be prevented as much as possible.
[0029]
The permanent magnet type reluctance type rotating electric machine according to claim 14, comprising a stator having a stator winding and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet and a cavity provided in the rotor core between the pair of permanent magnets,
The magnet insertion hole and the permanent magnet are characterized in that the permanent magnet is constituted by a main magnet and end magnets located at both ends thereof and having a larger thickness dimension than the main magnet. . With such a configuration, the same effect as that of the thirteenth aspect can be obtained.
[0030]
The permanent magnet type reluctance type rotating electric machine according to claim 15 includes a stator having a stator winding, and a rotor having a rotor core,
The rotor is provided on an outer peripheral portion of the rotor core, and has a pair of substantially rectangular magnet insertion holes whose facing distance sequentially increases toward the outer periphery, and is inserted and fixed in the pair of magnet insertion holes. A permanent magnet and a cavity provided in the rotor core between the pair of permanent magnets,
The pair of magnet insertion holes and the permanent magnets are characterized in that one permanent magnet is configured to have a larger thickness dimension than the other permanent magnet.
[0031]
According to such a configuration, it is difficult for the magnetic flux from the stator winding to pass through one of the permanent magnets having a large thickness dimension, so that a decrease in output due to the demagnetizing action of the permanent magnet can be prevented as much as possible.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 2 is a cross-sectional view in the radial direction showing a configuration of a permanent magnet type reluctance type rotary electric machine of the present embodiment. 1 is a partially enlarged cross-sectional view of the rotor, and the same portions as those in FIG. 30 are denoted by the same reference numerals and description thereof is omitted.
[0033]
1 and 2, a rotor 10 is characterized in that a plurality of hollow portions 11 are formed in a rotor core 2 between a pair of permanent magnets 4. The hollow portion 11 is composed of a total of eight holes in four rows substantially parallel to the permanent magnets 4, 4. In the rotor 10, the portion 12 where the pair of magnet insertion holes 3, 3 and the permanent magnets 4, 4 and the cavity portion 11 are provided is a portion (q axis) where it is difficult for the magnetic flux to pass.
In FIG. 2, the stator 13 is configured such that a stator winding 16 is housed in a slot 15 of a stator core 14 formed by laminating a number of annular silicon steel plates. The rotor 10 is disposed inside the stator 13.
[0034]
Thus, the rotor 10 is formed with a portion (q axis) 12 through which magnetic flux hardly passes and a portion (d axis) 7 through which magnetic flux easily passes (so-called magnetic irregularities are formed). The magnetic energy stored by flowing a current through the stator winding 16 differs between the air gap portions on the portions 12 and 7, and a change in the magnetic energy generates reluctance torque. In addition, since the rotor 10 is also provided with the permanent magnets 4, torque is generated by the magnetic attraction force and the magnetic repulsion between the permanent magnets 4, 4 and the magnetic poles of the stator 13. This causes the rotor 10 to rotate.
[0035]
According to this embodiment, the magnetic flux from the stator winding 16 is prevented from passing through the permanent magnet 4 by the plurality of cavities 11 as much as possible. The output can be prevented from lowering as much as possible. Further, the plurality of cavities 11 make it difficult for the magnetic flux of the portion (q-axis) 12 to pass therethrough. Therefore, the salient pole ratio increases, the reluctance torque increases, and the output increases. In addition, since the iron core portion exists in the center of the plurality of hollow portions 11, the centrifugal strength of the rotor 10 can be increased.
[0036]
(Second embodiment)
FIG. 3 shows a second embodiment of the present invention. The difference from FIG. 1 is that the cavity 11 is further subdivided into the rotor core 2 to form a cavity 17 having ten holes. Thus, a portion (q-axis) 18 where the magnetic flux is difficult to pass is formed, and thus a rotor 19 is configured.
According to the second embodiment, the same effect as that of the first embodiment can be obtained.
[0037]
(Third embodiment)
FIG. 4 shows a third embodiment of the present invention. What is different from FIG. 30 is that the rotor core 2 has a pair of permanent magnets 4, 4 at the ends of the bridge portion 8 and at the tip 9 side. , And a plurality of four holes 20 located on the side of the cavity 5 are formed as a portion (q-axis) 21 where magnetic flux is difficult to pass, thereby forming a rotor 22. I have.
According to the third embodiment, the magnetic flux from the stator winding 16 (see FIG. 2) is prevented from passing through the ends of the permanent magnets 4 by the four holes 20 as much as possible. Therefore, a decrease in output due to the demagnetizing action of the permanent magnets 4 and 4 can be prevented as much as possible.
[0038]
(Fourth embodiment)
5 and 6 show a fourth embodiment of the present invention. The difference from FIG. 30 is that a substantially triangular cavity 23 similar to the cavity 5 is provided in the rotor core 2 as a pair of permanent magnets. One of the magnets 4 and 4 is formed so as to be close to the permanent magnet 4 and is a portion (q-axis) 24 where it is difficult for the magnetic flux to pass therethrough.
[0039]
Thus, the rotor 25 acts on the reluctance torque by the portion (q-axis) 24 where the magnetic flux hardly passes and the portion (d-axis) 7 where the magnetic flux is easy to pass, and the N pole and the N pole in the permanent magnet 4 and the stator 13. The magnetic pole acts by repelling the poles and attracting the north pole and the south pole to rotate in the arrow direction (counterclockwise) (see FIG. 6). In this case, when the same pole of the stator 3 relatively approaches the permanent magnet 4, the magnetic flux causes the permanent magnet 4 to be demagnetized. The same applies to the first to third embodiments.
[0040]
However, in the fourth embodiment, since the cavity 23 is formed so as to be close to one of the pair of permanent magnets 4, that is, the clockwise permanent magnet 4, the stator winding 16 ( The magnetic flux from (see FIG. 2) is less likely to pass through one of the permanent magnets 4 due to the cavity 23, and therefore, a decrease in output due to the demagnetizing action of the permanent magnet 4 can be prevented as much as possible.
[0041]
(Fifth embodiment)
FIG. 7 shows a fifth embodiment of the present invention. The difference from FIG. 30 is that the rotor core 2 has magnet insertion holes 3 instead of a pair of magnet insertion holes 3. A substantially V-shaped magnet insertion hole portion 26 is formed on both sides and continuous at the bridge portion 8, and a substantially V-shaped permanent magnet 27 is inserted along the magnet insertion hole portion 26 by bonding. It is a fixed portion (q-axis) 28 that is hard to pass magnetic flux, and thus constitutes a rotor 29.
[0042]
According to the fifth embodiment, the magnet insertion hole 26 has a substantially V shape, and the permanent magnet 27 inserted into the magnet insertion hole 26 has a substantially V shape. Not only is no end formed on the inner circumference side causing magnetic flux leakage, but also a bridge portion 8 serving as a magnetic flux leakage path is not formed in the rotor core 2, so that a decrease in output due to magnetic flux leakage can be prevented as much as possible.
[0043]
(Sixth embodiment)
FIG. 8 shows a sixth embodiment of the present invention. The difference from FIGS. 7 and 30 is that a pair of permanent magnets 4 are provided on both sides of a substantially V-shaped magnet insertion hole 26 in the rotor core 2. , 4 are inserted and fixed by bonding to form a portion (q-axis) 30 in which magnetic flux is difficult to pass, thereby forming a rotor 31.
According to the sixth embodiment, although the end portions are formed on the inner peripheral side of the permanent magnets 4, the bridge portion 8 serving as a magnetic flux leakage path is not formed in the rotor core 2. This has the same effect as 5.
[0044]
(Seventh embodiment)
FIG. 9 shows a seventh embodiment of the present invention. The difference from FIG. 8 is that the outer peripheral ends of both sides are opened in the rotor core 2 instead of the magnet insertion holes 26 (that is, FIG. 9). , No tip parts 9, 9) are formed, and a magnet insertion hole 32 having a substantially V-shape is formed, and a portion (q axis) 33 through which magnetic flux does not easily pass is formed. Thus, a rotor 34 is configured. In this case, as an adhesive for fixing the permanent magnets 4 and 4 to the magnet insertion hole 32, an adhesive having a larger adhesive strength than the adhesive used in the other embodiments and having extremely little aging is used. I do.
According to the seventh embodiment, the tip portions 9 and 9 serving as magnetic flux leakage paths are not formed in the rotor core 2, so that the magnetic flux leakage of the permanent magnet 4 is further reduced as compared with the seventh embodiment. It is possible to prevent the output from lowering.
[0045]
(Eighth embodiment)
FIG. 10 shows an eighth embodiment of the present invention. The difference from FIG. 9 is that a circular cavity 35 is formed in the rotor core 2 instead of the cavity 5, and A support bar 36 made of a non-magnetic material is fitted or press-fitted into the hollow portion 35 so as to penetrate the hollow portion 35. The support bar 36 is supported by both end plates of the rotor core 2 and has a portion (q The shaft 37 is formed, and thus, a rotor 38 is configured. Note that the portion 37 is formed with a caulking portion 39 for binding the laminated iron cores constituting the portion 37.
According to the eighth embodiment, the same effects as those of the seventh embodiment can be obtained, the centrifugal strength can be increased by the support rod 36, and the laminated core of the portion 37 can be formed by the caulking portion 39. Can be bound, so that the assemblability is improved.
The caulking portion 39 may be provided as needed.
[0046]
(Ninth embodiment)
FIG. 11 shows a ninth embodiment of the present invention. The difference from FIG. 30 is that the outer peripheral ends of both sides are opened in the rotor core 2 instead of the magnet insertion holes 3 and 3. The magnet insertion holes 40, 40 (that is, the absence of the tip portions 9, 9) are formed to form a portion (q-axis) 41 in which magnetic flux is difficult to pass, thereby forming the rotor 42.
According to the ninth embodiment, since the rotor core 2 is not provided with the tip portions 9 serving as magnetic flux leakage paths, the magnetic flux leakage of the permanent magnet 4 can be prevented, and the output can be reduced. It can be prevented as much as possible.
[0047]
(Tenth embodiment)
FIG. 12 shows a tenth embodiment of the present invention. The difference from FIG. 11 is that the outer peripheral end faces of the permanent magnets 4 and 4 are related to the outer open ends of the magnet insertion holes 40 and 40. Locking projections 43, 43 for stopping are formed, and thus a rotor 44 is configured.
According to the tenth embodiment, the same effects as those of the ninth embodiment can be obtained, and even if a centrifugal force acts on the permanent magnet 4 when the rotor 44 rotates, the locking projections 43 prevents the permanent magnet 4 from coming off.
[0048]
(Eleventh embodiment)
FIG. 13 shows an eleventh embodiment of the present invention. The difference from FIG. 30 is that the width of the rotor core 2 is sequentially reduced toward the inner circumference instead of the magnet insertion holes 3 and 3. Magnet insertion holes 45, 45 which become larger are formed, and permanent magnets 46, 46 whose thickness dimension gradually increases toward the inner peripheral side are inserted into these magnet insertion holes 45, 45 and fixed by bonding. Thus, a portion (q-axis) 47 in which the magnetic flux is difficult to pass is formed, and thus the rotor 48 is configured.
According to such an eleventh embodiment, the magnetic flux from the stator winding 16 (see FIG. 2) becomes more difficult to pass through the permanent magnet 47 toward the inner peripheral side thereof. The output can be prevented from lowering as much as possible.
[0049]
(Twelfth embodiment)
FIG. 14 shows a twelfth embodiment of the present invention. The difference from FIG. 13 is that, instead of the magnet insertion holes 45, the width of the rotor core 2 is gradually increased toward the outer peripheral side. Are formed, and permanent magnets 50, 50 whose thickness dimensions gradually increase toward the outer peripheral side are inserted into these magnet insertion holes 49, 49, and are fixed by bonding. A portion (q-axis) 51 in which magnetic flux is hard to pass is formed, and thus a rotor 52 is configured.
According to the twelfth embodiment, the magnetic flux from the stator winding 16 (see FIG. 2) becomes harder to pass through the permanent magnet 50 toward the outer peripheral side thereof. A decrease in output can be prevented as much as possible.
[0050]
(Thirteenth embodiment)
FIG. 15 shows a thirteenth embodiment of the present invention, which is different from FIG. 30 in that the rotor core 2 has magnets other than the magnet insertion holes 3 and 3 in which both ends have other widths. Larger magnet insertion holes 53, 53 are formed, and permanent magnets 54, 54 whose both end portions are larger in thickness than other portions are inserted and fixed in these magnet insertion holes 53, 53, so that the magnetic flux can pass. A difficult portion (q-axis) 55 is formed, and thus a rotor 56 is configured.
According to the thirteenth embodiment, since the magnetic flux from the stator winding 16 (see FIG. 2) hardly passes through both ends of the permanent magnet 54, the output is reduced due to the demagnetizing action of the permanent magnet 54. Can be prevented as much as possible.
[0051]
(14th embodiment)
FIG. 16 shows a fourteenth embodiment of the present invention. The difference from FIG. 15 is that the magnet insertion holes 53, 53 of the rotor core 2 are replaced with permanent magnets 54, 54 instead of main magnets 54, 54. Permanent magnets 57, 57, which are 57a and end magnets 57b, 57b located at both ends thereof and having a larger thickness dimension, are inserted and fixed to form a portion (q-axis) 58 in which magnetic flux is difficult to pass. Thus, the rotor 59 is configured.
According to the fourteenth embodiment, the same effect as in the thirteenth embodiment can be obtained.
[0052]
(Fifteenth embodiment)
FIG. 17 shows a fifteenth embodiment of the present invention. The difference from FIG. 30 is that the magnet insertion on the clockwise side, which is one of the pair of magnet insertion holes 3, is inserted into the rotor core 2. Instead of the hole 3, a magnet insertion hole 60 having a larger width than this is formed, and a permanent magnet 61 having a thickness larger than the permanent magnet 4 is inserted and fixed in the magnet insertion hole 60 of the child. Thus, a portion (q-axis) 62 in which magnetic flux is difficult to pass is formed, and thus a rotor 63 is formed.
According to the fifteenth embodiment, the magnetic flux from the stator winding 16 (see FIG. 2) hardly passes through the permanent magnet 61, so that a decrease in output due to the demagnetizing action of the permanent magnet 61 is prevented as much as possible. can do.
[0053]
FIGS. 18 to 29 are configuration examples proposed in the course of the development of the present invention. Hereinafter, these will be described as reference examples, and the same parts as those in FIGS. 1 to 17 and FIG. The same reference numerals are given.
[0054]
(First Reference Example)
FIG. 18 shows a first reference example, which includes two V-shaped cavities 64 having sides parallel to a pair of permanent magnets 4, 4 and an inverted triangular cavities. 65 are formed.
[0055]
(Second reference example)
FIG. 19 shows a second reference example, in which, instead of the cavities 64 and 65 shown in FIG. 18, cavities 66 and 67 having rounded central corners are provided. Configuration.
[0056]
(Third reference example)
FIG. 20 shows a third reference example, in which cutouts 68, 68 are formed in portions corresponding to the chip portions 9, 9 shown in FIG.
[0057]
(Fourth reference example)
FIG. 21 shows a fourth reference example, which has a configuration in which triangular holes 69, 69 are formed in portions corresponding to the chip portions 9, 9 shown in FIG.
[0058]
(Fifth reference example)
FIG. 22 shows a fifth reference example, in which notches 68, 68 are formed in portions corresponding to the tip portions 9, 9 shown in FIG. This is a configuration in which a triangular hole 70 is formed.
[0059]
(Sixth reference example)
FIG. 23 shows a sixth reference example in which triangular holes 69, 69 are formed in portions corresponding to the chip portions 9, 9 shown in FIG. This is a configuration in which a triangular hole 70 is formed in a portion where the hole 70 is formed.
[0060]
(Seventh Reference Example)
FIG. 24 shows a seventh reference example, in which the magnet insertion holes 3, 3 are provided with auxiliary holes 3a extending to the inner peripheral side at positions corresponding to the bridges 8, 8 shown in FIG. , 3a are provided, and auxiliary holes 3b, 3b are provided at positions corresponding to the tip portions 9, 9 and extend to the outer peripheral side. Further, the auxiliary holes 3a, 3a and 3b, 3b are provided with: This is a configuration in which locking projections 71, 71 and 72, 72 for locking to end faces of the permanent magnets 4, 4 are formed.
[0061]
(Eighth Reference Example)
FIG. 25 shows an eighth embodiment of the present invention, in which the auxiliary projections 3b, 3b are provided on the end face of the permanent magnet 4 instead of the locking projections 72, 72 shown in FIG. This is a configuration in which locking projections 73, 73 that lock from the opposite side are formed.
[0062]
(Ninth Reference Example)
FIG. 26 shows a ninth reference example. In FIG. 24, the ninth embodiment locks the auxiliary holes 3a, 3a on the end faces of the permanent magnets 4, 4 from the side opposite to the locking projections 71, 71. The locking projections 74 are further formed.
[0063]
(10th reference example)
FIG. 27 shows a tenth reference example, which has a configuration in which locking projections 71, 74, 72, and 73 are formed in the corner auxiliary holes 3a and 3b.
[0064]
(Eleventh Reference Example)
FIG. 28 shows an eleventh reference example in which a substantially triangular hollow portion 23a is formed in the rotor core 2 so as to be close to one of the pair of permanent magnets 4. And a portion 24b in which a substantially triangular hollow portion 23b is formed so as to be close to the other permanent magnet 4 of the pair of permanent magnets 4, 4 is formed alternately. .
[0065]
(Twelfth Reference Example)
FIG. 29 shows a twelfth reference example, in which the pitch between the portions 6, 6 is alternately large and small (therefore, the pitch between the portions 7, 7 is also alternately large and small). This is the configuration.
[0066]
It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings. For example, in each embodiment, the permanent magnet is fixed to the magnet insertion hole by bonding, but is fixed by press fitting instead. Needless to say, the present invention can be appropriately modified and implemented without departing from the scope of the invention.
[0067]
【The invention's effect】
As described above, the permanent-magnet-type reluctance-type rotating electric machine of the present invention has an effect that it is possible to prevent the magnetic flux from leaking from the permanent magnet or the output from decreasing due to the demagnetizing action of the permanent magnet.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view of a waist showing a first embodiment of the present invention.
FIG. 2 is an overall sectional view.
FIG. 3 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;
FIG. 4 is a view corresponding to FIG. 1, showing a third embodiment of the present invention;
FIG. 5 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention;
FIG. 6 is a diagram corresponding to FIG. 2 for explaining operation.
FIG. 7 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.
FIG. 8 is a view corresponding to FIG. 1, showing a sixth embodiment of the present invention.
FIG. 9 is a view corresponding to FIG. 1, showing a seventh embodiment of the present invention.
FIG. 10 is a view corresponding to FIG. 1, showing an eighth embodiment of the present invention;
FIG. 11 is a view corresponding to FIG. 1, showing a ninth embodiment of the present invention;
FIG. 12 is a view corresponding to FIG. 1, showing a tenth embodiment of the present invention;
FIG. 13 is a view corresponding to FIG. 1, showing an eleventh embodiment of the present invention;
FIG. 14 is a view corresponding to FIG. 1, showing a twelfth embodiment of the present invention;
FIG. 15 is a view corresponding to FIG. 1, showing a thirteenth embodiment of the present invention;
FIG. 16 is a view corresponding to FIG. 1, showing a fourteenth embodiment of the present invention;
FIG. 17 is a view corresponding to FIG. 1, showing a fifteenth embodiment of the present invention;
FIG. 18 is a view corresponding to FIG. 1, showing a first reference example;
FIG. 19 is a diagram corresponding to FIG. 1, showing a second reference example;
FIG. 20 is a view corresponding to FIG. 1, showing a third reference example;
FIG. 21 is a view corresponding to FIG. 1, showing a fourth reference example;
FIG. 22 is a view corresponding to FIG. 1, showing a fifth reference example;
FIG. 23 is a view corresponding to FIG. 1, showing a sixth reference example;
FIG. 24 is a view corresponding to FIG. 1, showing a seventh reference example;
FIG. 25 is a view corresponding to FIG. 1, showing an eighth reference example;
FIG. 26 is a view corresponding to FIG. 1, showing a ninth reference example;
FIG. 27 is a view corresponding to FIG. 1, showing a tenth reference example;
FIG. 28 is a view corresponding to FIG. 2, showing an eleventh reference example;
FIG. 29 is a view corresponding to FIG. 2, showing a twelfth reference example;
FIG. 30 is a sectional view of a rotor showing a conventional example.
[Explanation of symbols]
In the drawing, 2 is a rotor core, 3 is a magnet insertion hole, 4 is a permanent magnet, 5 is a cavity, 8 is a bridge, 9 is a tip, 10 is a rotor, 11 is a cavity, and 13 is a stator. , 14 is a stator core, 16 is a stator winding, 17 and 18 are cavities, 19 is a rotor, 20 is a hole, 22 is a rotor, 23 is a cavity, 25 is a rotor, and 26 is a magnet insert. Hole, 27 is a permanent magnet, 29 and 31 are rotors, 32 is a magnet insertion hole, 34 is a rotor, 35 is a cavity, 36 is a support rod, 38 is a rotor, 40 is a magnet insertion hole, 42 is Is a rotor, 43 is a locking projection, 44 is a rotor, 45 is a magnet insertion hole, 46 is a permanent magnet, 48 is a rotor, 49 is a magnet insertion hole, 50 is a permanent magnet, 52 is a rotor, 53 Is a magnet insertion hole, 54 is a permanent magnet, 56 is a rotor, 57 is a permanent magnet, 57a is a main magnet, and 57b is an end magnet. 59 rotor 60 magnet insertion holes, 61 permanent magnet, 63 shows the rotor.

Claims

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A plurality of cavities provided in the rotor core between the pair of permanent magnets and substantially parallel to the permanent magnets;
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

2. The permanent magnet type reluctance type rotating electric machine according to claim 1, wherein the hollow portion is further subdivided.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A substantially triangular cavity having a side portion substantially parallel to each permanent magnet and a side portion along the outer periphery provided in the rotor core between the pair of permanent magnets,
A plurality of holes provided in the rotor core, located at the bridge-side end and the tip-side end of each permanent magnet, and located at the cavity side,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A substantially triangular shape which is provided on the rotor core between the pair of permanent magnets, has sides substantially parallel to the respective permanent magnets, and sides along the outer periphery, and is close to one of the pair of permanent magnets. Of the cavity,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A substantially V-shaped magnet insertion hole portion provided on an outer peripheral portion of the rotor core and having both sides expanding toward the outer periphery;
A permanent magnet inserted and fixed in the magnet insertion hole so as to follow it,
A cavity provided in the rotor core between both sides of the permanent magnet,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A substantially V-shaped magnet insertion hole portion provided on an outer peripheral portion of the rotor core and having both sides expanding toward the outer periphery;
A pair of permanent magnets inserted and fixed to both sides of the magnet insertion hole,
A cavity provided in the rotor core between both sides of the permanent magnet,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A substantially V-shaped magnet insertion hole portion provided on the outer peripheral portion of the rotor core, with both sides expanding toward the outer periphery and the outer peripheral ends of the both sides being open;
A pair of permanent magnets inserted and fixed to both sides of the magnet insertion hole,
A hollow portion provided in the rotor core between the pair of permanent magnets,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A substantially V-shaped magnet insertion hole portion provided on the outer peripheral portion of the rotor core, with both sides expanding toward the outer periphery and the outer peripheral ends of the both sides being open;
A pair of permanent magnets inserted and fixed to both sides of the magnet insertion hole,
A support rod provided between the pair of permanent magnets in the rotor core so as to penetrate the rotor core, and supported by both end plates of the rotor core;
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer periphery of the rotor core, and whose opposing distances are gradually increased toward the outer periphery and whose outer end is open,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A hollow portion provided in the rotor core between the pair of permanent magnets,
A permanent magnet type reluctance type rotating electric machine characterized by comprising:

The permanent magnet type reluctance type rotating electric machine according to claim 9, further comprising a locking projection that locks an end of the magnet at an open end of the pair of magnet insertion holes.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A cavity provided in the rotor core between the pair of permanent magnets,
The permanent magnet type reluctance type rotating electric machine, wherein the magnet insertion hole and the permanent magnet are configured such that the thickness dimension of the permanent magnet increases toward the inner peripheral side.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A cavity provided in the rotor core between the pair of permanent magnets,
The permanent magnet type reluctance type rotating electric machine, wherein the magnet insertion hole and the permanent magnet are configured such that the thickness dimension of the permanent magnet increases toward the outer peripheral side.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A cavity provided in the rotor core between the pair of permanent magnets,
The permanent magnet type reluctance type rotating electric machine, wherein the magnet insertion hole and the permanent magnet are configured such that the thickness dimension of both ends of the permanent magnet is larger than other portions.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A cavity provided in the rotor core between the pair of permanent magnets,
The magnet insertion hole and the permanent magnet are characterized in that the permanent magnet is configured to include a main magnet and end magnets located at both ends thereof and having a larger thickness dimension than the main magnet. Permanent magnet type reluctance type rotating electric machine.

A stator having a stator winding, and a rotor having a rotor core,
The rotor,
A pair of substantially rectangular magnet insertion holes, which are provided on the outer peripheral portion of the rotor core, and whose facing distance increases in order toward the outer periphery,
A permanent magnet inserted and fixed in the pair of magnet insertion holes,
A cavity provided in the rotor core between the pair of permanent magnets,
The permanent magnet type reluctance type rotating electric machine, wherein the pair of magnet insertion holes and the permanent magnets are configured such that one permanent magnet has a larger thickness dimension than the other permanent magnet.