一种新型螺旋绕组自驱动磁轴承
A New self-propelled magnetic bearing with helical windings
摘要：
在这项工作中，提出了一种主动的、基于永磁体的自推进磁轴承的设计，即具有以下特征的悬浮电动机：（a）简单的绕组结构，（b）高负载支撑能力，（c）无偏心传感器，（d）在所有平移维度上稳定的约束，（e）在所有旋转维度上稳定的约束，以及（f）高效率。该设计使用由螺旋缠绕的三相定子和转子组成的架构，转子的磁体也以螺旋方式布置。主动控制用于以位于第二象限中的转矩角激励转子。该转矩角与转子在定子腔内的位置无关，因此控制算法类似于常规永磁体同步电动机的控制算法。它是通过一个物理参数的动机，轴承转子发展成正比的输出扭矩的升力，它保持稳定的空间限制。然后通过对磁场、力和力矩的计算，严格地证明了这些断言。给出了系统的刚度矩阵，并讨论了稳定和不稳定的工作区域。
英文摘要：
In this work a design is proposed for an active, permanent magnet based, self-propelled magnetic bearing i.e. levitating motor having the following features : (a) simple winding structure, (b) high load supporting capacity, (c) no eccentricity sensors, (d) stable confinement in all translational dimensions, (e) stable confinement in all rotational dimensions and (f) high efficiency. This design uses an architecture consisting of a helically wound three-phase stator, and a rotor with the magnets also arranged in a helical manner. Active control is used to excite the rotor at a torque angle lying in the second quadrant. This torque angle is independent of the rotor's position inside the stator cavity hence the control algorithm is similar to that of a conventional permanent magnet synchronous motor. It is motivated through a physical argument that the bearing rotor develops a lift force proportional to the output torque and that it remains stably confined in space. These assertions are then proved rigorously through a calculation of the magnetic fields, forces and torques. The stiffness matrix of the system is presented and a discussion of stable and unstable operating regions is given.
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