关键词: 直线电机, 微小行程, 有限元仿真

Abstract: 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 simulationwere almost the same, which verified the feasibility of the electromagnetic structure in short distance single phase cylinder linear motor.

Key words: linear motor, short distance, finite element simulation