微小行程单相圆筒型直线电机设计研究

Design and Study of A Short Distance Single Phase Cylinder Linear Motor

研究了一种微小行程单相圆筒型直线电机,该电机动子轴直接输出直线位移,无需采用将旋转运动转化为直线运动的机械结构,动子可以被动旋转。电机的直线输出采用差动式电磁结构实现,控制单相绕组的电流大小和方向即可控制输出位移的大小和方向,方便实现开环控制。由于采用了永磁体,断电时电机具有一定的轴向位置保持力。通过磁路分析和有限元仿真对该直线电机进行了原理性论证和详细计算,并研制了一台行程为0.07 mm的样机进行实验研究,测试结果与仿真计算结果基本一致,验证了该微小行程单相圆筒型直线电机电磁结构的可行性。

A short distance single phase cylinder linear motor was studied.The axis of the mover outputed linear displacement directly,without any mechanical structures that transform rotational motion to rectilinear motion,and the mover could be rotated passively.The linear output of the motor was fulfilled by difference electromagnetic structure.By controlling the magnitude and direction of winding current,the quantity and direction of the output linear displacement could be controlled relatively.It’s convenient for using open-loop control method.Because of the permanent magnets,there existed a certain holding force when the supply was cut off.Theoretical analysis and detailed calculation were carried out by magnetic circuit model as well as finite element simulation.A prototype whose stroke is 0.07 mm was made and tested.The results of experiment and simulation were almost the same,which verified the feasibility of the electromagnetic structure in short distance single phase cylinder linear motor.