インナーロータ型スピンドルにおける空気軸受の特性解析

抄録

Recently, amount of information is increasing every year all over the world. Therefore, the data centers which can manage information are increasing too. Hard disk drives are used in the data centers because of their reasonability and high recording density. On the other hand, electric consumption has been increased with increasing data center amount. Therefore, the new structure of a spindle motor applied air bearing is proposed in this study. As new structure of the spindle motor, inner rotor is applied instead of outer rotor. The new structure is expected improve the characteristics of the air bearing. In this paper, the characteristic of the air bearing which is mounted new structural spindle motor was analyzed. In addition, this paper studied theoretically about effectivity of the air bearing. As a result, air bearing friction torque is lower than oil bearing one. In addition, angular stiffness of air bearing is larger than oil bearing.