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可以实现直线运动，因此得到了广泛的应用。此外，一些驱动器，不仅在一个方向上，但也在两个方向上的x-y平面上的报告。这些驱动器被称为表面电机（SFM）。然后，设计了一种在平面内自由运动的新型表面电机，并制作了样机模型。所提出的SFM的原理与直线脉冲电机的原理相同。但初级侧是定子，次级侧是动子，则定子由多个电磁铁组成，动子由四个永磁铁组成（动磁式，MM型）。因此，动子不受导线的连接，并且动子除了通过定子线圈的适当激励在x-y平面上沿两个方向的运动之外还可以自身旋转。由于动子和定子是完全分离的，因此该结构可以应用于封闭空间。在本研究中，我们利用有限元素法进行模拟，并对马达进行最佳化设计。并通过实验测量了推力特性。研究了气隙对推力特性的影响，得到了获得优良推力特性的最佳气隙长度。对微步驱动进行了实验研究。此外，还检查了磁极的数量和磁极的布置。然而，由于SFM的推力很小，测试的SFM的运动是不稳定的。为了改善这种缺陷，除了吸引力之外，还使用排斥力。其结果是，推力特性得到改善。此外，还对驱动方式进行了进一步的研究，降低了振动。

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.