无轴承交替极电机控制系统改进及实现  

Improvement and Realization of Consequent-pole Bearingless Motor Control System

作　　者：解超[1] 王晓琳[1] 邓智泉[1] 廖启新[1] 仇志坚[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市210016

出　　处：《中国电机工程学报》2010年第18期78-84,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50507008)~~

摘　　要：推导无轴承交替极电机计及转子偏心的径向悬浮力数学模型,提出零电流同轴定位方法,提高了定转子同轴定位精度,而且避免了同轴位置检测过程中发生的定转子机械碰撞。针对传统悬浮控制方案中各方向上允许的最大悬浮力不相等的问题,提出一种改进型悬浮控制策略,从而实现了电机在任意方向上的最大悬浮出力。针对非正弦气隙磁场的悬浮转子角度测量问题,设计了一套转角转速测量方案,并对测量误差进行了详细分析。对所提方案进行了实验验证,结果表明,控制系统的改进对增加定转子同轴定位精度、降低悬浮系统功耗、提高电机悬浮出力范围和减小控制系统复杂程度具有重要意义。The mathematical model with consideration of the rotor displacement for the consequent-pole bearingless PM motor is constructed,and one method called zero-current orientation is proposed to fix the coaxial position of the stator and rotor,which has advantage to increase the precision and avoid the impact during the measuring process.To the problem of the not equal each other in maximum suspension forces along different angle in the traditional control system,another improved strategy is proposed and the equal maximum suspension forces is realized.Moreover,a rotor angle measuring method is designed,that simplifies the angle measurement.The schemes above all have been verified by the experiment,the result shows that the improved system has important sense to improve the coaxial precision,reduce the loss of the suspension system,increase the scope of the maximum suspension force and simplify the control system.

关 键 词：无轴承 交替极 同轴 最大悬浮力 转角测量 

分 类 号：TM343[电气工程—电机]