Weinreb Benjamin S, Noh Minkyun, Fyler Donald C, Trumper David L
Cambridge, MA 02139, USA.
Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
IEEE Trans Ind Appl. 2021 Nov-Dec;57(6):6774-6782. doi: 10.1109/tia.2021.3080663. Epub 2021 May 17.
In this paper, we present a bearingless motor with a novel segmented dipole interior permanent magnet (IPM) slice rotor. The segmented dipole IPM rotor contains a unique pattern of interior permanent magnets arranged to generate a dipole air gap flux pattern. The magnets are encapsulated within an electrical steel rotor structure. The stator contains a three-phase, four-pole winding for suspension and a three-phase, two-pole winding for rotation. We present analyses of several candidate rotor designs. The analyses indicate that the segmented dipole IPM rotor achieves a reduced trade-off between force and torque capacity and relatively symmetric force dynamics as compared to prior art designs and alternate topologies. Symmetric and decoupled force dynamics allow a simple force decoupling algorithm to be used. We designed, constructed, and tested a prototype system. We experimentally demonstrate that the prototype system can achieve stable levitation and open-loop rotation.
在本文中，我们展示了一种带有新型分段偶极内置式永磁（IPM）薄片转子的无轴承电机。分段偶极IPM转子包含一种独特的内置永磁体排列方式，用于产生偶极气隙磁通模式。磁体封装在电工钢转子结构内。定子包含一个用于悬浮的三相四极绕组和一个用于旋转的三相两极绕组。我们对几种候选转子设计进行了分析。分析表明，与现有技术设计和其他拓扑结构相比，分段偶极IPM转子在力和转矩容量之间实现了更小的权衡，并且具有相对对称的力动态特性。对称和解耦的力动态特性允许使用简单的力解耦算法。我们设计、构建并测试了一个原型系统。我们通过实验证明，该原型系统能够实现稳定悬浮和开环旋转。
