Reduction in Torque and Suspension Force Ripples of an Axial-Gap Single-Drive Bearingless Motor
Reduction in Torque and Suspension Force Ripples of an Axial-Gap Single-Drive Bearingless Motor
复制标题
轴向间隙单驱动无轴承电机的扭矩和悬架力脉动的降低
DOI：
10.1109/ecce.2016.7855382
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and A. Chiba
中科院分区：
文献类型：
--
作者：
J. Asama;K. Takahashi;T. Oiwa;and A. Chiba
研究了一种轴向气隙无轴承电机采用单自由度轴向主动定位时力矩和悬浮力脉动的减小问题。这种单自由度控制的无轴承电机只使用一套三相绕组和一个三相逆变器，称为单驱动无轴承电机(SDBelM)。提出的轴向间隙SDBelM结合了排斥式永磁联轴器，稳定了四自由度径向和倾斜运动。考虑到永磁体产生的磁通密度分布的空间谐波，从理论上推导了分别由d轴和q轴电流调节的悬浮力和转矩。为了减少力矩和力的波动，我们提出了改进的磁铁形状，磁件之间有间隙。有限元计算表明，所提出的结构能有效地减小转矩和悬浮力脉动。
This paper investigates reduction in torque and suspension force ripples of an axial-gap type bearingless motor with one-degree-of-freedom (DOF) active positioning in the axial direction. This one-DOF controlled bearingless motor employs only one set of three-phase winding and one three-phase inverter, called a single-drive bearingless motor (SDBelM). The proposed axial-gap SDBelM combines a repulsive permanent magnetic coupling that stabilizes four-DOF radial and tilting motions. The suspension force and torque, which are regulated by the d- and q-axis currents, respectively, are theoretically derived considering the spatial harmonics of the flux density distribution induced from the permanent magnets. For reduction in torque and force ripples, we have proposed the improved magnet shape with the gap between the magnet pieces. The finite element method calculation shows that the proposed PM configuration is effective to reduce the torque and the suspension force ripples.