Title :
Concentrated anisotropic magnetization for high sensitivity of optical pickup actuator
Author :
Choi, In-Ho ; Hong, Seong-Pyo ; Chung, Won-Eull ; Kim, Young-Joong ; Lee, Man-Hyoung ; Kim, Jin-Yong
Author_Institution :
Digital Media Res. Lab., LG Electron. Inc., Seoul, South Korea
fDate :
5/1/1999 12:00:00 AM
Abstract :
To improve the driving sensitivity of an optical pickup actuator for high density and high speed, we present a new magnetizing method-concentrated anisotropic magnetization for Nd-Fe-B sintered magnets. The electromagnetic field analysis applying 3-D FEM was performed and several samples were actually tested. From comparing simulated data with experimental results, we verified the accuracy of the simulation and the superiority of the presented method
Keywords :
boron alloys; electric actuators; electromagnetic fields; electromagnetic forces; finite element analysis; iron alloys; machine theory; magnetic anisotropy; magnetisation; neodymium alloys; permanent magnet machines; 3-D FEM; Nd-Fe-B; Nd-Fe-B sintered magnets; concentrated anisotropic magnetization; driving sensitivity improvement; electromagnetic field analysis; electromagnetic force; high density; high sensitivity; high speed; optical pickup actuator; Actuators; Anisotropic magnetoresistance; Electromagnetic fields; Geometrical optics; High speed optical techniques; Magnetic anisotropy; Magnetization; Magnets; Optical sensors; Perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
