JPS5548906A - Anisotropic permanent magnet - Google Patents

Anisotropic permanent magnet

Info

Publication number
JPS5548906A
JPS5548906A JP5427378A JP5427378A JPS5548906A JP S5548906 A JPS5548906 A JP S5548906A JP 5427378 A JP5427378 A JP 5427378A JP 5427378 A JP5427378 A JP 5427378A JP S5548906 A JPS5548906 A JP S5548906A
Authority
JP
Japan
Prior art keywords
permanent magnet
cylindrical body
magnet
gradient
solid
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.)
Pending
Application number
JP5427378A
Other languages
Japanese (ja)
Inventor
Takafumi Aoyama
Yuzo Ito
Keitaro Yamashita
Katsunobu Yamamoto
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP5427378A priority Critical patent/JPS5548906A/en
Publication of JPS5548906A publication Critical patent/JPS5548906A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To constitute an integral anisotropic permanent magnet by providing a hollow or solid cylindrical body, and by applying a magnet gradient by utilizing the formation of a hydrostatic pressure in a direct current magnetic field.
CONSTITUTION: A hollow or solid supporter 2 that composes a magnet roller 1, is placed in a direct current magnetic field, and a magnet gradient is applied by forming a hydrostatic pressure, thereby constituting an integral permanent magnet made by firing to form a magnetized zone 7 around the surface of the cylindrical body 2. Magnetic flux density at the surface of a nonmagnetic sleeve 3 should be high enough so that the flux produced in the magnetized zone 7 can penetrate the anisotropic permanent magnet 6 in the cylindrical body 2. By constituting the permanent magnet into an integrated solid, the surface density B of the magnetic flux becomes uniform in its longitudinal direction, as well as demagnetization coefficient respect to the magnetized zone 7 has a larger gradient at the surface which reduces low temperature demagnetization. An inside contour of the cross section of the cylindrical body 2 in this constitution has a shape which is close to a circle.
COPYRIGHT: (C)1980,JPO&Japio
JP5427378A 1978-05-08 1978-05-08 Anisotropic permanent magnet Pending JPS5548906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5427378A JPS5548906A (en) 1978-05-08 1978-05-08 Anisotropic permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5427378A JPS5548906A (en) 1978-05-08 1978-05-08 Anisotropic permanent magnet

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49120362A Division JPS5147297A (en) 1974-10-21 1974-10-21 Eikyujishakuno seizohoho

Publications (1)

Publication Number Publication Date
JPS5548906A true JPS5548906A (en) 1980-04-08

Family

ID=12965961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5427378A Pending JPS5548906A (en) 1978-05-08 1978-05-08 Anisotropic permanent magnet

Country Status (1)

Country Link
JP (1) JPS5548906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144354A (en) * 1988-03-24 1989-06-06 Hitachi Metals Ltd Rotor for stepping motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4975336A (en) * 1972-11-24 1974-07-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4975336A (en) * 1972-11-24 1974-07-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144354A (en) * 1988-03-24 1989-06-06 Hitachi Metals Ltd Rotor for stepping motor

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