BRPI0505725A - anisotropic bipolar cylindrical sintered magnet, motor and method to produce said magnet - Google Patents

anisotropic bipolar cylindrical sintered magnet, motor and method to produce said magnet

Info

Publication number
BRPI0505725A
BRPI0505725A BRPI0505725A BRPI0505725A BR PI0505725 A BRPI0505725 A BR PI0505725A BR PI0505725 A BRPI0505725 A BR PI0505725A BR PI0505725 A BRPI0505725 A BR PI0505725A
Authority
BR
Brazil
Prior art keywords
motor
anisotropic
magnet
sintered magnet
cylindrical sintered
Prior art date
Application number
Other languages
Portuguese (pt)
Inventor
Ohsawa Toshikuni
Original Assignee
Tdk Corp
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
Application filed by Tdk Corp filed Critical Tdk Corp
Publication of BRPI0505725A publication Critical patent/BRPI0505725A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273—Imparting anisotropy

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

"ìMã SINTERIZADO CILìNDRICO BIPOLAR ANISOTRóPICO, MOTOR E MéTODO PARA PRODUZIR O DITO ìMã". Compreendendo um ímã sinterizado cilíndrico, um motor e um método para produzir um ímã sinterizado cilíndrico, com meios para prevenção de deslizamento durante a rotação, a redução drástica dos danos à matriz interna e da abrasão quando da moldagem, e a redução da relação de defeito pós-sinterização até mesmo para um motor de torque elevado; trata-se de um ímã sinterizado cilíndrico bipolar anisotrópico (8), cuja forma em seção transversal da periferia externa é um círculo verdadeiro, e cuja forma em seção transversal da periferia interna é uma elipse."ANISOTROPIC BIPOLAR CYLINDRICAL SYNTERIZED MOTHER, MOTOR AND METHOD TO PRODUCE THE SAID". Comprising a cylindrical sintered magnet, a motor and a method for producing a cylindrical sintered magnet, with means for preventing slippage during rotation, drastically reducing internal matrix damage and abrasion when molding, and reducing the defect ratio post sintering even for a high torque motor; It is an anisotropic bipolar cylindrical sintered magnet (8) whose cross-sectional shape of the outer periphery is a true circle and whose cross-sectional shape of the inner periphery is an ellipse.

BRPI0505725 1999-03-12 2005-12-19 anisotropic bipolar cylindrical sintered magnet, motor and method to produce said magnet BRPI0505725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06700099A JP4772171B2 (en) 1999-03-12 1999-03-12 Method for producing anisotropic oxide permanent magnet and molding die

Publications (1)

Publication Number Publication Date
BRPI0505725A true BRPI0505725A (en) 2006-04-25

Family

ID=13332251

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0505725 BRPI0505725A (en) 1999-03-12 2005-12-19 anisotropic bipolar cylindrical sintered magnet, motor and method to produce said magnet

Country Status (2)

Country Link
JP (1) JP4772171B2 (en)
BR (1) BRPI0505725A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4802426B2 (en) * 2001-09-11 2011-10-26 日立金属株式会社 Magnetic field forming apparatus and powder forming method
KR100642218B1 (en) * 2005-02-23 2006-11-03 (주)대한특수금속 A magnetic field press apparatus
JP4550669B2 (en) * 2005-06-03 2010-09-22 国立大学法人 東京大学 Magnetic force field generator

Also Published As

Publication number Publication date
JP4772171B2 (en) 2011-09-14
JP2000260617A (en) 2000-09-22

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Legal Events

Date Code Title Description
B08F Application fees: dismissal - article 86 of industrial property law

Free format text: REFERENTE A 8A ANUIDADE.

B08K Lapse as no evidence of payment of the annual fee has been furnished to inpi (acc. art. 87)

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2259 DE 22/04/2014.