具有被动式磁力轴承的无刷直流电机研究  

STUDY ON BRUSHLESS DC MOTOR WITH PASSIVE MAGNETIC BEARINGS

作　　者：王凤翔[1] 王继强[1] 孔志国[1] 

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110023

出　　处：《中国电机工程学报》2004年第5期90-95,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(59977014)

摘　　要：非接触式磁力轴承广泛用于高速电机及某些具有免维护要求的特殊应用场合,如人工心脏旋转血泵。该文介绍了一种具有被动式磁力轴承的新型无刷直流电机。采用该文提出的被动式磁力轴承,电机转子可实现磁悬浮而不需要进行悬浮力控制。电机转子的轴向稳定性依靠被动式轴承以及永磁转子由于轴向位移产生的轴向力来实现。电机转子的径向磁悬浮,需要通过对被动式磁力轴承永磁环以及无刷直流电机的气隙、永磁体的径向厚度和轴向长度的优化设计来实现。The non-contact magnetic bearings are widely used in high-speed machines and in some special applications such as blood pump for artificial heart. A new structure of brushless DC (BLDC) motor with passive magnetic bearings (PMB) is introduced in this paper. The magnetic suspension of the rotor is realized by the use of the proposed passive magnetic bearings that does not need any active control. The axial stability of the rotor is obtained by the radial force of the passive magnetic bearings as well as the axial force produced by the PM motor due to the axial offset of the rotor. The radial magnetic suspension of the machine rotor is achieved by the optimal design of the air-gap length, thickness and axial length of the PM rings of the passive magnetic bearings, and the BLDC motor.

关 键 词：无刷直流电机 被动式磁力轴承 无位置传感器 控制策略 有限元分析 

分 类 号：TM33[电气工程—电机]