WO2004021551A3 - Permanent magnet excited machine - Google Patents

Permanent magnet excited machine Download PDF

Info

Publication number
WO2004021551A3
WO2004021551A3 PCT/US2003/027162 US0327162W WO2004021551A3 WO 2004021551 A3 WO2004021551 A3 WO 2004021551A3 US 0327162 W US0327162 W US 0327162W WO 2004021551 A3 WO2004021551 A3 WO 2004021551A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnets
rotor
thickness
machine includes
low permeability
Prior art date
Application number
PCT/US2003/027162
Other languages
French (fr)
Other versions
WO2004021551A2 (en
Inventor
Gary E Horst
Richard E Hartsfield Jr
Mark E Carrier
Alan D Crapo
Original Assignee
Emerson Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/229,719 external-priority patent/US6727623B2/en
Priority claimed from US10/229,506 external-priority patent/US6946766B2/en
Application filed by Emerson Electric Co filed Critical Emerson Electric Co
Priority to CN038234599A priority Critical patent/CN1689211B/en
Priority to EP03770267A priority patent/EP1540794A2/en
Priority to AU2003278743A priority patent/AU2003278743A1/en
Publication of WO2004021551A2 publication Critical patent/WO2004021551A2/en
Publication of WO2004021551A3 publication Critical patent/WO2004021551A3/en

Links

Classifications

    • 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
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A machine includes a rotor defining at least two adjacent magnet retention slots and a plurality of interior permanent magnets. The rotor's radial thickness above a magnet retention slot transitions from a first thickness to a bridge region having a lesser, second thickness. The transition occurs within a defined angular expanse. Low permeability areas are positioned below the bridge region between the magnets. There are no direct linear paths between the ends of the magnets and no direct linear paths that extend radially from the outer rotor portion to the interior of the rotor, between the magnets, that do not pass through a low permeability area. A machine includes a stator defining stator poles, a rotor with interior permanent magnets. In one embodiment, at least two impedance reduction slits are positioned radially outward of the magnets, and at least a portion of each slit is within a defined region.
PCT/US2003/027162 2002-08-28 2003-08-27 Permanent magnet excited machine WO2004021551A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN038234599A CN1689211B (en) 2002-08-28 2003-08-27 Built-in type permanent magnet machine and rotor
EP03770267A EP1540794A2 (en) 2002-08-28 2003-08-27 Permanent magnet machine
AU2003278743A AU2003278743A1 (en) 2002-08-28 2003-08-27 Permanent magnet excited machine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/229,506 2002-08-28
US10/229,719 2002-08-28
US10/229,719 US6727623B2 (en) 2002-08-28 2002-08-28 Reduced impedance interior permanent magnet machine
US10/229,506 US6946766B2 (en) 2002-08-28 2002-08-28 Permanent magnet machine

Publications (2)

Publication Number Publication Date
WO2004021551A2 WO2004021551A2 (en) 2004-03-11
WO2004021551A3 true WO2004021551A3 (en) 2004-07-01

Family

ID=31980945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/027162 WO2004021551A2 (en) 2002-08-28 2003-08-27 Permanent magnet excited machine

Country Status (3)

Country Link
EP (1) EP1540794A2 (en)
AU (1) AU2003278743A1 (en)
WO (1) WO2004021551A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010041015A1 (en) 2010-09-20 2012-03-22 Robert Bosch Gmbh Machine component for an electrical machine
WO2015162713A1 (en) * 2014-04-23 2015-10-29 三菱電機株式会社 Embedded permanent magnet-type electric motor, compressor, and refrigeration/air-conditioning device
JP2017118648A (en) * 2015-12-22 2017-06-29 山本電気株式会社 Electric motor for cleaner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6008559A (en) * 1997-07-22 1999-12-28 Matsushita Electric Industrial Co., Ltd. Motor using a rotor including an interior permanent magnet
JP2000217287A (en) * 1999-01-19 2000-08-04 Toshiba Corp Permanent magnet type motor and compressor
EP1067656A2 (en) * 1999-07-07 2001-01-10 Lafert S.P.A. Brushless electric motor with permanent magnets inside the rotor and electronic power supply and driver thereof
WO2002027893A1 (en) * 2000-09-25 2002-04-04 Toshiba Carrier Corporation Rotor of electric motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6008559A (en) * 1997-07-22 1999-12-28 Matsushita Electric Industrial Co., Ltd. Motor using a rotor including an interior permanent magnet
JP2000217287A (en) * 1999-01-19 2000-08-04 Toshiba Corp Permanent magnet type motor and compressor
EP1067656A2 (en) * 1999-07-07 2001-01-10 Lafert S.P.A. Brushless electric motor with permanent magnets inside the rotor and electronic power supply and driver thereof
WO2002027893A1 (en) * 2000-09-25 2002-04-04 Toshiba Carrier Corporation Rotor of electric motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 11 3 January 2001 (2001-01-03) *

Also Published As

Publication number Publication date
EP1540794A2 (en) 2005-06-15
AU2003278743A8 (en) 2004-03-19
WO2004021551A2 (en) 2004-03-11
AU2003278743A1 (en) 2004-03-19

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