JP2011529681A - 電気機械のための回転子 - Google Patents
電気機械のための回転子 Download PDFInfo
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- JP2011529681A JP2011529681A JP2011521258A JP2011521258A JP2011529681A JP 2011529681 A JP2011529681 A JP 2011529681A JP 2011521258 A JP2011521258 A JP 2011521258A JP 2011521258 A JP2011521258 A JP 2011521258A JP 2011529681 A JP2011529681 A JP 2011529681A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
- H02K5/1285—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs of the submersible type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49012—Rotor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
- Windings For Motors And Generators (AREA)
- Motor Or Generator Cooling System (AREA)
- Transmission Devices (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
本出願は、2008年7月28日に出願された米国仮出願第61/084,238号、2008年9月11日に出願された米国仮出願第61/096,290号、2009年7月1日に出願された米国特許出願第12/496,552号、2009年7月1日に出願された米国特許出願第12/496,619号、および2009年7月1日に出願された米国特許出願第12/496,621号の利益を主張するものである。これらの出願の全開示は、参照により本明細書に組み込まれる。
Claims (64)
- 回転子ハブと、
前記回転子ハブの周囲部の周りに取り付けられる複数の永久磁石セグメントと
を備え、前記複数の永久磁石セグメントは、
実質的に均一な弧長の、前記永久磁石セグメントの中の第1の複数のセグメント、および
前記第1の複数の永久磁石セグメントよりもそれぞれの弧長が短い2つの片を含む、マルチピース永久磁石セグメントであり、前記片の中の1つの磁化方向ベクトルが前記マルチピース・セグメント中の少なくとも1つの他の片の磁化方向ベクトルとは異なる、マルチピース永久磁石セグメント
を備える、電気機械のための回転子。 - 前記第1の複数のセグメント中の磁石セグメントが、単一の一体成形材料片から形成される、請求項1に記載の回転子。
- 前記マルチピース・セグメントの弧長と前記第1の複数のセグメントの弧長とが、実質的に同一である、請求項1に記載の回転子。
- 第2の複数の永久磁石セグメントをさらに備え、前記第2の複数のセグメント中のセグメントの弧長が、前記第1の複数のセグメント中の前記セグメントの弧長とは異なる、請求項1に記載の回転子。
- 前記複数のマルチピース磁石セグメントが、補極セグメントである、請求項1に記載の回転子。
- マルチピース・セグメント中の1つの片の弧長が、同じマルチピース・セグメント中の第2の片の弧長よりも長い、請求項1に記載の回転子。
- マルチピース・セグメント中の1つの片が、同じマルチピース・セグメント中の第2の片の材料とは異なる材料から形成される、請求項1に記載の回転子。
- 前記マルチピース・セグメント中の1つの片の材料が、同じマルチピース・セグメント中の前記第2の片の材料よりも高い磁化レベルを有する、請求項7に記載の回転子。
- 前記マルチピース・セグメントの材料が、同じマルチピース・セグメント中の前記第2の片の材料とは異なる磁気的特徴を有する、請求項7に記載の回転子。
- マルチピース・セグメント中の少なくとも1つの片が、前記第1の複数のセグメントと等しい弧長の、かつ前記第1の複数のセグメントと同一の材料から形成される、単一の永久磁石セグメントをセグメント化することにより構成される、請求項1に記載の回転子。
- マルチピース・セグメント中の1つの片が、同じマルチピース・セグメント中の第2の片の磁気方向ベクトルに対して垂直な磁気方向ベクトルを有する、請求項1に記載の回転子。
- 前記回転子は、実質的に円筒状の長尺の回転子である、請求項1に記載の回転子。
- 前記回転子は、深海中作動用に適合化される、請求項1に記載の回転子。
- 電気機械の回転子のための永久磁石セグメントであって、前記永久磁石は、前記回転子の円筒状外方表面の1セクションを形成する形で前記回転子に設置されるようになされており、前記永久磁石セグメントは、
第1の磁化方向ベクトルを有する第1の永久磁石セクションと、
前記第1の永久磁石セクションに取り付けられ、前記第1の磁化方向ベクトルとは異なる磁化方向ベクトルを有する、第2の永久磁石セクションと
を備える、永久磁石セグメント。 - 前記第1の永久磁石セクションおよび前記第2の永久磁石セクションは、共に接合される、請求項14に記載の永久磁石セグメント。
- 前記第2の永久磁石セクションのサイズが、前記第1の永久磁石セクションよりも大きい、請求項14に記載の永久磁石セグメント。
- 前記第1および前記第2の永久磁石セクションの前記磁化ベクトルは、方向成分および大きさ成分を含み、前記第1および前記第2の永久磁石セクションの前記磁化ベクトルは、それぞれ異なる方向成分を有する、請求項14に記載の永久磁石セグメント。
- 前記第1および前記第2の永久磁石セクションの前記磁化ベクトルは、方向成分および大きさ成分を含み、第1およびセクションの永久磁石セグメントの磁化ベクトルが、それぞれ異なる大きさ成分を有する、請求項14に記載の永久磁石セグメント。
- 電気機械のための回転子を形成する方法であって、
回転子ハブの周囲部に均一弧長の第1の複数の永久磁石セグメントを取り付けるステップと、
前記回転子ハブの前記周囲部にマルチピース永久磁石セグメントを取り付けるステップであり、前記マルチピース・セグメントは、前記第1の複数の永久磁石セグメントよりもそれぞれの弧長が短い2つの片を備え、前記マルチピース・セグメント中の第1の片の磁化方向ベクトルが、前記マルチピース・セグメント中の第2の片の磁化方向ベクトルとは異なる、ステップと
を含む、方法。 - 前記第1の複数のセグメントと等しい弧長の、かつ前記第1の複数のセグメントと同一の材料から形成される、単一の永久磁石セグメントをセグメント化することにより、前記マルチピース・セグメントの片を形成するステップをさらに含む、請求項19に記載の方法。
- 前記第1の片の前記磁化方向ベクトルは、前記第1の複数のセグメントの磁化方向とは異なる、請求項19に記載の方法。
- 電気機械のための多極回転子であって、
回転子ハブと、
前記回転子ハブの周囲部の周りの複数の一次永久磁石セグメントであり、各一次磁石セグメントの外方面が、実質的に弧状であり、前記回転子ハブに設置された場合にこの回転子の実質的に円筒状の表面の1セクションを画成し、各一次永久磁石セグメントが、ラジアル方向に磁化されて、その外方面に対して垂直な磁気方向ベクトルを有する磁場を有する、複数の一次永久磁石セグメントと、
前記回転子ハブの周囲部の周りの複数の補極永久磁石セグメントであり、各補極磁石セグメントの外方面が、実質的に弧状であり、前記回転子ハブに設置された場合にこの回転子の実質的に円筒状の表面の1セクションを画成し、各補極永久磁石セグメントが、その外方面に対して垂直ではない磁気方向ベクトルを有する磁場を有する、複数の補極永久磁石セグメントと
を備える、多極回転子。 - 前記一次永久磁石セグメントの弧長と前記補極永久磁石セグメントの弧長とが、均一である、請求項22に記載の回転子。
- 前記回転子中の磁極の数と少なくとも同一数の補極永久磁石セグメントを備える、請求項22に記載の回転子。
- 補極永久磁石セグメントの総数が2つであり、前記一次永久磁石セグメントおよび前記補極永久磁石セグメントが、2極を規定する、請求項22に記載の回転子。
- 補極永久磁石セグメントの総数が4つであり、前記一次永久磁石セグメントおよび前記補極永久磁石セグメントが、4極を規定する、請求項22に記載の回転子。
- 前記一次永久磁石セグメントおよび前記補極永久磁石セグメントが、多極を規定する、請求項22に記載の回転子。
- 電気機械のための2極回転子であって、
回転子ハブと、
前記回転子ハブの周囲部の周りに位置し、この回転子の実質的に円筒状の表面を画成する、少なくとも4つの永久磁石セグメントと
を備え、前記永久磁石セグメントの中の少なくとも4つがそれぞれ、前記磁気セグメントを二等分する前記円筒状表面の半径に対して異なる方向を有する磁気方向ベクトルを有する、2極回転子。 - 少なくとも2つの磁石セグメントが、前記回転子ハブの表面に対して実質的に垂直な磁気方向ベクトルを有する、請求項28に記載の回転子。
- 前記回転子ハブの表面が、前記回転子の半径に対して垂直である、請求項29に記載の回転子。
- 少なくとも2つの磁気方向ベクトルが、前記回転子の半径に対して実質的に垂直である、請求項29に記載の回転子。
- 前記永久磁石セグメントのそれぞれの弧長が、均一である、請求項28に記載の回転子。
- 前記永久磁石の中の少なくとも2つが、補極磁石である、請求項28に記載の回転子。
- 電気機械のための回転子であって、
回転子ハブと、
前記回転子ハブの周囲部の周りに端部同士を接した状態で位置する複数の永久磁石セグメントであり、各永久磁石セグメントの外方面が弧状であり、これらの永久磁石セグメントが一体としてこの回転子の円筒状表面を画成し、各磁石セグメントが、前記円筒状表面の中心からラジアル方向に向かう、その磁石セグメントを二等分する中心線を備える、複数の永久磁石セグメントと
を備え、前記複数の磁石セグメントは、磁極を規定し、この磁極は、前記複数の磁石セグメントのそれぞれの中心線から方位角において位置をずらされる、前記円筒状表面の中心からラジアル方向に向かい前記磁極を二等分する磁気方向ベクトルを有する、回転子。 - 前記磁気方向ベクトルは、前記複数の磁石セグメントのそれぞれの端部から方位角において位置をずらされる、請求項34に記載の回転子。
- 前記回転子は2極回転子である、請求項34に記載の回転子。
- 前記回転子は3つ以上の磁極を有する、請求項34に記載の回転子。
- 前記複数のセグメントの中の少なくとも2つのセグメントが、補極セグメントである、請求項34に記載の回転子。
- 前記補極セグメントは、分離補極セグメントである、請求項38に記載の回転子。
- 電気機械のための回転子であって、
中心軸を有する回転子ハブと、
前記回転子ハブの周囲部の周りに位置し、この回転子の実質的に円筒状の表面を形成する、複数の永久磁石セグメントと
を備え、前記磁石セグメントのそれぞれが、前記円筒状表面の前記中心から実質的にラジアル方向に向かう、または、前記円筒状表面に対する接線に対して実質的に平行であるかもしくは前記回転子ハブの中心を中心として弧状であるかのうちの少なくとも1つである、磁気方向ベクトルを有する、回転子。 - 前記円筒状表面に対する接線に対して平行な磁気方向ベクトルを有するセグメントが、同一の弧長を有し、前記円筒状表面の中心からラジアル方向に向かう磁気方向ベクトルを有するセグメントが、同一の弧長を有する、請求項40に記載の回転子。
- 前記円筒状表面の中心からラジアル方向に向かう磁気方向ベクトルを有するセグメントの弧長が、前記円筒状表面に対する接線に対して平行な磁気方向ベクトルを有するセグメントの弧長とは異なる、請求項40に記載の回転子。
- 電気機械のための2極回転子であって、
回転子ハブと、
前記回転子ハブの周囲部に取り付けられ、この回転子の実質的に円筒状の外方表面を画成する、複数の永久磁石セグメントであり、これらの磁石セグメントはそれぞれ、方向ベクトル成分を有する磁場を有し、前記回転子ハブの前記周囲部に取り付けられたこれらの磁石セグメントの方向ベクトル成分が、互いに実質的に平行であり、実質的に同一方向に配向される、複数の永久磁石セグメントと
を備える、2極回転子。 - 前記複数の永久磁石セグメントは、実質的に同一の弧長を有する、請求項43に記載の回転子。
- 各磁石セグメントの方向ベクトル成分の配向が、前記セグメントの弧長全体にわたって均一である、請求項43に記載の回転子。
- 前記回転子ハブの前記周囲部に取り付けられた4つの永久磁石セグメントを備える、請求項43に記載の回転子。
- 前記回転子ハブの前記周囲部に取り付けられた16個の永久磁石セグメントを備える、請求項43に記載の回転子。
- 前記磁石セグメントは、曲線状の外向表面を備える、請求項43に記載の回転子。
- 第1の磁石セグメントの方向ベクトル成分が、その外向表面に対して第1の方向に配向され、第2の磁石セグメントの方向ベクトル成分が、前記第2の磁石セグメントの外向表面に対して第2の別の方向に配向される、請求項43に記載の回転子。
- 第1および第2の磁極を規定するステップであり、
各磁極が、電気機械の回転子の実質的に円筒状の外方表面を画成するように構成された複数の磁石セグメント中の永久磁石セグメントの磁場によって規定され、
磁極を規定する磁場の方向ベクトル成分が、互いに実質的に平行である、ステップと、
電気機械の固定子内において前記磁場を回転させるステップと
を含む、方法。 - 前記複数の磁場は、4つの磁場を含む、請求項50に記載の方法。
- 前記複数の磁場は、16個の磁場を含む、請求項50に記載の方法。
- 前記複数の磁場は、実質的に同一強度のものである、請求項50に記載の方法。
- 電気機械のための4極回転子であって、
回転子ハブと、
前記回転子ハブに取り付けられ、この回転子の円筒状の外方表面の第1の弧を画成し、この回転子の第1の磁極を規定する、第1の複数の永久磁石セグメントであり、各第1の磁石セグメントが、方向ベクトル成分を有する磁場を有し、前記回転子ハブに取り付けられたこれらの第1の磁石セグメントのベクトル方向成分が、互いに実質的に平行であり、実質的に同一の第1の方向に配向される、第1の複数の永久磁石セグメントと、
前記回転子ハブに取り付けられ、この回転子の円筒状の外方表面の第2の弧を画成し、この回転子の第2の磁極を規定する、第2の複数の永久磁石セグメントであり、各第2の磁石セグメントが、方向ベクトル成分を有する磁場を有し、前記回転子ハブに取り付けられたこれらの第2の磁石セグメントのベクトル方向成分が、互いに実質的に平行であり、実質的に同一の第2の方向に配向される、第2の複数の永久磁石セグメントと、
前記回転子ハブに取り付けられ、この回転子の円筒状の外方表面の第3の弧を画成し、この回転子の第3の磁極を規定する、第3の複数の永久磁石セグメントであり、各第3の磁石セグメントが、方向ベクトル成分を有する磁場を有し、前記回転子ハブに取り付けられたこれらの第3の磁石セグメントのベクトル方向成分が、互いに実質的に平行であり、実質的に同一の第3の方向に配向される、第3の複数の永久磁石セグメントと、
前記回転子ハブに取り付けられ、この回転子の円筒状の外方表面の第4の弧を画成し、この回転子の第4の磁極を規定する、第4の複数の永久磁石セグメントであり、各第4の磁石セグメントが、方向ベクトル成分を有する磁場を有し、前記回転子ハブに取り付けられたこれらの第4の磁石セグメントのベクトル方向成分が、互いに実質的に平行であり、実質的に同一の第4の方向に配向される、第4の複数の永久磁石セグメントと
を備える、4極回転子。 - 前記第1の方向が、前記第3の方向に対して逆方向かつ実質的に平行に配向され、前記第2の方向が、前記第4の方向に対して逆方向かつ実質的に平行に配向される、請求項54に記載の回転子。
- 前記第1および前記第3の方向は、前記第2および前記第4の方向に対して直交方向に配向される、請求項55に記載の回転子。
- 前記第1の弧は、前記第3の弧に対して直径方向に位置決めされ、前記第2の弧は、前記第4の弧に対して直径方向に位置決めされる、請求項55に記載の回転子。
- 前記第1、前記第2、前記第3、および前記第4の複数のセグメントは、等しい個数のセグメントを含む、請求項54に記載の回転子。
- 前記第1、前記第2、前記第3、および前記第4の複数のセグメントの中のセグメントが、実質的に均一な弧長のものである、請求項54に記載の回転子。
- 前記第1、前記第2、前記第3、および前記第4の複数のセグメントは、協働して、前記回転子の円筒状外方表面を画成する、請求項54に記載の回転子。
- 互いに実質的に平行な方向ベクトル成分を有する第1の複数の磁場を有する第1の磁極を規定するステップであり、前記第1の複数の磁場は、実質的に円筒状の表面の第1の四分円弧を画成するように構成された第1の複数の永久磁石によって生じる、ステップと、
互いに実質的に平行な方向ベクトル成分を有する第2の複数の磁場を有する第2の磁極を規定するステップであり、前記第2の複数の磁場は、実質的に円筒状の表面の第2の四分円弧を画成するように構成された第2の複数の永久磁石によって生じる、ステップと、
互いに実質的に平行な方向ベクトル成分を有する第3の複数の磁場を有する第3の磁極を規定するステップであり、前記第3の複数の磁場は、実質的に円筒状の表面の第3の四分円弧を画成するように構成された第3の複数の永久磁石によって生じる、ステップと、
互いに実質的に平行な方向ベクトル成分を有する第4の複数の磁場を有する第4の磁極を規定するステップであり、前記第4の複数の磁場は、実質的に円筒状の表面の第4の四分円弧を画成するように構成された第4の複数の永久磁石によって生じる、ステップと、
電気機械の固定子内で前記磁極を回転させるステップと
を含む、方法。 - 磁場の総数が、16個の磁場を含む、請求項61に記載の方法。
- 前記複数の磁場は、実質的に同一強度である、請求項61に記載の方法。
- 前記第1の複数の磁場は、前記第2の複数の磁場とは異なる方向に配向される、請求項61に記載の方法。
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