A Study of The New Type Surface Motor.

近年来，直线电机由于不需要齿轮和皮带就能获得直线运动而得到了广泛的应用。此外，还报道了一些在x-y平面上不仅在一个方向上运动，而且在两个方向上运动的致动器。这些执行器被称为表面电机（SFMs）。然后，我们设计了一种在平面内自由运动的新型表面电机，并制作了原型模型。所提出的SFM与线性脉冲电机的原理相同。但是主侧是定子，次侧是动器，那么定子由许多电磁铁组成，动器由四个永磁体组成（动磁体型，mm型）。因此，移动器不需要连接电线，并且通过对定子线圈的适当激励，移动器除了在x-y平面上的两个方向上运动外，还可以旋转自己。拟议的可持续发展基金已实现了这些动议。由于动、定子是完全分离的，所以这种SFM可能对封闭空间的应用很有用。在本研究中，我们采用有限元方法进行了仿真，并对电机进行了优化设计。并对其推力特性进行了实验测量。研究了气隙对推力特性的影响，得到了获得良好推力特性的最佳气隙长度。对微步驱动进行了检测。此外，还考察了磁极的数目和磁极的排列方式。然而，由于SFM的推力较小，测试的SFM运动不稳定。为了改善这一缺陷，在引力之外还使用了斥力。因此，推力特性得到了改善。进一步研究了驱动方法，减小了振动。

Recently, linear motors have had a wide range of applications because they can obtain linear motion without gears and belts. Moreover, some actuators that move not only in one direction but also in two directions on the x-y plane are reported. These actuators are called surface motors (SFMs). Then, we designed a new surface motor which moved freely in the plane, and made a prototype model. The principle of the proposed SFM is same as that of the linear pulse motor. But the primary side is the stator and the secondary side is the mover, then the stator consists of many electromagnets and the mover consists of four permanent magnets (Moving Magnet Type, MM-Type). Consequently, the mover is free from the connection of the wire and the mover can rotate itself in addition to the motion in two directions on the x-y plane by the appropriate excitation of the stator coils. These motions have been realized by the proposed SFM.This SFM might be useful for the application in the space sealed up, because the mover and the stator are completely separate. In this studying, we simulated by FEM, and did the best design of the motor. And, the thrust characteristic was measured by the experiment. The thrust characteristic by the influence of the airgap was examined, and the best airgap length to obtain an excellent thrust characteristic was obtained. The micro step drive was examined. In addition, the number of magnetic poles and the arrangement of the magnetic pole were examined. However the motion of the tested SFM was unstable because the thrust of the SFM is small. To improve this defect, the repulsion force is used in addition to the attraction force. As a result, the thrust characteristic is improved. Moreover, driving method was examined further, and the vibration was decreased.