ES199411A1 - PERFECTIONS INTRODUCED IN THE PREPARATION OF MAGNETIC BODIES THAT HAVE A HIGH PERMEABILITY FERROMAGNETIC PART AND A PERMANENT MAGNET CONSTITUTED BY A THIN BODY - Google Patents

PERFECTIONS INTRODUCED IN THE PREPARATION OF MAGNETIC BODIES THAT HAVE A HIGH PERMEABILITY FERROMAGNETIC PART AND A PERMANENT MAGNET CONSTITUTED BY A THIN BODY

Info

Publication number
ES199411A1
ES199411A1 ES0199411A ES199411A ES199411A1 ES 199411 A1 ES199411 A1 ES 199411A1 ES 0199411 A ES0199411 A ES 0199411A ES 199411 A ES199411 A ES 199411A ES 199411 A1 ES199411 A1 ES 199411A1
Authority
ES
Spain
Prior art keywords
ferromagnetic part
preparation
permanent magnet
magnetic bodies
high permeability
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES0199411A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES199411A1 publication Critical patent/ES199411A1/en
Expired legal-status Critical Current

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Hard Magnetic Materials (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Prostheses (AREA)
  • Magnetic Treatment Devices (AREA)

Abstract

Perfeccionamientos introducidos en la preparación de cuerpos magnéticos que comprenden una parte ferromagnética de alta permeabilidad y un imán permanente delgado imantado sustancialmente en la dirección de su dimensión más reducida y hecho de un material de alta fuerza coercitiva por lo menos 750 Oersted y una remanencia comparativamente baja por ejemplo inferior que 5000 Gauss siendo dicha dimensión más reducida inferior que una cuarta parte de la dimensión más grande de una de las superficies polares caracterizados por el hecho de que el imán está dispuesto en la parte ferromagnética en forma tal que el área superficial de la proyección del imán sobre un plano perpendicular a la dirección resultante de las líneas de fuerza en la parte ferromagnética es por lo menos una y media vez y preferentemente por lo menos dos veces menor que una de las superficies polares del imán.Improvements introduced in the preparation of magnetic bodies comprising a ferromagnetic part of high permeability and a thin permanent magnet magnetized substantially in the direction of its smallest dimension and made of a material of high coercive force at least 750 Oersted and a comparatively low remanence for example less than 5000 Gauss, said smallest dimension being less than a quarter of the largest dimension of one of the polar surfaces characterized by the fact that the magnet is arranged in the ferromagnetic part in such a way that the surface area of the Projection of the magnet on a plane perpendicular to the resulting direction of the lines of force in the ferromagnetic part is at least one and a half times and preferably at least two times less than one of the pole surfaces of the magnet.

ES0199411A 1951-04-23 1951-08-31 PERFECTIONS INTRODUCED IN THE PREPARATION OF MAGNETIC BODIES THAT HAVE A HIGH PERMEABILITY FERROMAGNETIC PART AND A PERMANENT MAGNET CONSTITUTED BY A THIN BODY Expired ES199411A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL160737A NL81146C (en) 1951-04-23 1951-04-23

Publications (1)

Publication Number Publication Date
ES199411A1 true ES199411A1 (en) 1952-01-01

Family

ID=36853122

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0199411A Expired ES199411A1 (en) 1951-04-23 1951-08-31 PERFECTIONS INTRODUCED IN THE PREPARATION OF MAGNETIC BODIES THAT HAVE A HIGH PERMEABILITY FERROMAGNETIC PART AND A PERMANENT MAGNET CONSTITUTED BY A THIN BODY

Country Status (3)

Country Link
ES (1) ES199411A1 (en)
GB (1) GB708135A (en)
NL (1) NL81146C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12217908B2 (en) 2020-01-07 2025-02-04 Bomatec Management Ag Permanent magnet for use in an electric machine with one or more grooves

Also Published As

Publication number Publication date
GB708135A (en) 1954-04-28
NL81146C (en) 1956-03-16

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