Experimental study on a turnout device with a flux-synthesizing two-dimensional linear synchronous motor

搭建了二维直线同步电动机试验台，通过静态试验证明，该方法能有效地抑制x方向的齿槽力。例如，所提出的设计的推力方向。然而，由于定子铁芯和动铁芯之间的吸引力太大，不可能保持足够推力的差距短。为了避免大的吸引力，我们提出了一种新的设计，没有定子槽和环形绕组：一个可以提供尽可能大的电枢电流，并保持一个相对较长的间隙，抑制法向力。推导出了在法向力约束下，以推力最大和永磁储能利用率最大为目标的环形绕组结构下，最佳差距长度的理论计算公式，并对影响道岔性能的侧向推力进行了研究。根据第一台试验机的经验，电枢铁芯在横向方向上的不连续分配是导致齿槽力大于其自身推力的实质性问题。然而，横向齿槽力的理论分析几乎是不可能的，因为力强烈地依赖于差距周围的芯的三维和几何形状。因此，数值有限元场计算已被应用于改进的动子芯形状，以减少齿槽力：动子形状的微小修改，使齿槽力的相当大的减少，也就是说，横向驱动器的自启动。一个控制板与数字信号处理器已购买的基于硬件的调查的电源的电动机和电枢电流和单位同步电动机的速度的数字控制进行了理论研究。

A test machine of a two-dimensional linear synchronous motor was built, and the stand-still measurements have proved that one can effectively suppress a harmful cogging force in the x-direction, i. e., the thrust-direction by the proposed design. It was, however, impossible to keep the gap short for a sufficient thrust, since the attractive force between stator-and mover-cores was too large. For avoiding the large attractive force, we proposed a new design without stator slots and with ring windings : One may supply possibly large armature current and keep a relatively long gap for the suppressed normal force. A theoretical equation has been derived for optimizing the gap length under the configuration with the ring windings for maximized thrust and the usage of the stored energy in permanent magnets under the constraint of the normal force.Furthermore, the lateral thrust, inherently significant for the function of a turnout device, should be investigated. Discontinuous allocation of the armature cores in the lateral direction is the substantial problem, which results in cogging force larger than its own thrust, according to the experiences in the first test machine. A theoretical analysis of the lateral cogging force is, however, almost impossible since the force strongly depends on the three-dimensional and geometrical shapes of the cores around the gap. A numerical FEM-field calculation has been, hence, applied to the improvement of the mover-core shape for reducing the cogging force : A minor modification of the mover shape enables the considerable reduction of the cogging force, that is to say, the self-start of the lateral drive. A control board with a digital signal processor has been purchased for a hardware-based investigation of the power source of the motor and numerical controls of the armature current and the speed of the unit synchronous motors have been investigated theoretically too.