Levitation forces in bearingless permanent magnet motors
Levitation forces in bearingless permanent magnet motors
复制标题
无轴承永磁电机中的悬浮力
DOI：
10.1109/20.800752
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Nenninger
中科院分区：
文献类型：
--
作者：
W. Amrhein;S. Silber;K. Nenninger
无轴承电机通过在一个外壳中集成两个单独的绕组系统（具有不同极对的转矩和径向悬浮力绕组），将联合收割机无刷交流电机与主动磁轴承相结合。本文给出了一个洞察电机设计的悬浮力和转矩产生的影响。它表明，特别是对于机器与小的空气间隙，它可以是非常重要的选择正确的设计参数。增加永磁体高度以增加电动机扭矩可导致径向力的显著减小。的相互关系进行了讨论的基础上的麦克斯韦和洛伦兹力作用在定子表面。研究了一种适用于泵、风扇或鼓风机的无轴承低成本电动机。所提出的电动机只需要四个线圈的操作。
Bearingless motors combine brushless AC-motors with active magnetic bearings by the integration of two separate winding systems (torque and radial levitation force windings with different pole pairs) in one housing. This paper gives an insight into the influences of the motor design on the levitation force and torque generation. It is shown that especially for machines with small air gaps it can be very important to choose the right design parameters. Increasing the permanent magnet height in order to increase the motor torque can result in a remarkable reduction of radial forces. The interrelationships are discussed on the basis of Maxwell and Lorentz forces acting upon the stator surface. The investigations are presented for a bearingless low cost motor, suited for pump, fan or blower applications. The presented motor needs only four coils for operation.