Title :
Effect of the magnetization direction in permanent magnet on motor characteristics
Author :
Hong, Seong-Qo ; Cho, Han-SG ; Lee, Hae-Seok ; Cho, Hyun-Rae ; Lee, Hak-Yong
Author_Institution :
Digital Media Res. Lab., LG Electron. Inc., Seoul, South Korea
fDate :
5/1/1999 12:00:00 AM
Abstract :
Two kinds of magnetization in isotropic permanent magnets are introduced and analyzed by FEM: one is a radial magnetization type, the other is a parabolic one. From the results of FEA, it is found that the permanent magnet with parabolic magnetization has low leakage flux and high interior surface flux density despite using a nonmagnetic material backyoke. The magnetization types are applied to the spindle motor for optical disc media and verified by comparing the results of FEA with experimental results. As a result it is shown that the permanent magnet motor using the parabolic magnetization can consist of a magnet with a nonmagnetic material backyoke
Keywords :
finite element analysis; machine theory; magnetic flux; magnetic leakage; magnetisation; permanent magnet motors; permanent magnets; FEM; NdFeB bonded magnet; high interior surface flux density; isotropic permanent magnets; low leakage flux; magnetization direction; motor characteristics; nonmagnetic material backyoke; optical disc media; parabolic magnetization; permanent magnet; permanent magnet motor; radial magnetization; spindle motor; Drives; Hysteresis motors; Magnetic analysis; Magnetic flux; Magnetic materials; Magnetic separation; Magnetization; Optical materials; Permanent magnet motors; Permanent magnets;
Journal_Title :
Magnetics, IEEE Transactions on
