JPS5548906A - Anisotropic permanent magnet - Google Patents
Anisotropic permanent magnetInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4975336A (en) * | 1972-11-24 | 1974-07-20 |
-
1978
- 1978-05-08 JP JP5427378A patent/JPS5548906A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4975336A (en) * | 1972-11-24 | 1974-07-20 |
Cited By (1)
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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