Study and Analysis of a slim type CD-ROM Spindle Motor with Axial-winding and Radial-gap

• Main Author: 胡世賢
• Other Authors: 劉宗平
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/80956517072240333693

碩士 === 輔仁大學 === 物理學系 === 87 === Up to date, most spindle motors used in CD-ROM are the three-phase DC brushless motors with nine slots and twelve poles. However, due to the special sandwich structure of a single-phase DC brushless motor, its whole configuration thus becomes either thinner or lighter. Therefore it is very suitably used as a CD-ROM spindle motor. In addition, this kind of motor owns advantages of low cost and ease for fabrication. In this research, the effects of the base plate materials on single-phase spindle motors are investigated. A 3D FEM model is built in “Magnet5.2” software to analyze the motor. Experiments are also conducted to validate the simulation. The non-magnetic base plate with arc-shaping technique is proved to reduce the cogging torque, moreover, the shaft material has no significant influence on the motor performance. The difference between the simulation and experiments is also discussed.