中国电机工程学报2012，Vol.32Issue(36)：75-81,前插11,8.
无轴承无刷直流电机径向悬浮力精确数学模型
An Accurate Mathematical Model of Radial Suspension Force in Bearingless Brushless DC Motors
摘要
Abstract
An accurate mathematical model of radial suspension force in a bearingless brushless DC motor is of great significance to reduce the complexity of system and to improve the control accuracy. This paper began with the structure of the bearingless brushless DC motor, then elaborated on the working principle and established the equivalent circuit. The magnetomotive force of permanent magnets was equivalent to virtual currents in suspension windings, and then a mathematical model with single degree of freedoms for radial suspension force was derived. Finally, results by finite element analysis and theoretical values were compared. In order to get more convincing results, the correction factor was introduced for the displacement stiffness coefficient, and then the finite element analysis was carried out again. The ultimate results show that the proposed mathematical model of radial suspension force of the bearingless brushless DC motor has feasibility and high accuracy.关键词
无轴承无刷直流电机/径向悬浮力/数学模型/有限元分析Key words
bearingless brushless DC motor/ radial suspension force/ mathematical model/ finite element analysis分类
信息技术与安全科学引用本文复制引用
陈雷刚,朱熀秋..无轴承无刷直流电机径向悬浮力精确数学模型[J].中国电机工程学报,2012,32(36):75-81,前插11,8.基金项目
国家自然科学基金项目(60974053) （60974053）
江苏省高校科研成果产业化推进工程项目(JHB2012-39) （JHB2012-39）
江苏高校优势学科建设工程资助项目(苏政办发[2011]6号). （苏政办发[2011]6号）
