Feed screws are used in various industrial machines and robots to convert rotational motions into linear motions. Mechanical screws, such as ball screws and slide screws, transmit force via frictional contacts through which noise and heat are being generated; thus, the drive efficiency is decreased. To address these problems, we have proposed some types of magnetic lead screws (MLSs) without spiral permanent magnets. The design has no spiral permanent magnets and comprises relatively few components. However, the differences in the thrust density and productivity due to the structural differences have not been reported. This paper investigates and discusses the performance and productivity of the MLSs without spiral permanent magnets based on a magnetic field analysis using a three‐dimensional finite element method. The MLSs are designed under the same size and basic design parameters. The analysis results of the thrust and torque characteristics of the MLSs are shown and compared, and their productivity is evaluated by the number of components. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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无螺旋永磁体的电磁丝杠的结构简化和性能比较

进给螺杆用于各种工业机械和机器人中，以将旋转运动转换为线性运动。机械螺钉，例如滚珠丝杠和滑动螺钉，通过摩擦接触传递力，通过摩擦接触产生噪音和热量。因此，驱动效率降低。为了解决这些问题，我们提出了一些没有螺旋永久磁铁的磁性丝杠（MLS）。该设计没有螺旋永磁体，并且包含相对较少的组件。然而，尚未报道由于结构差异导致的推力密度和生产率差异。本文基于三维有限元方法的磁场分析，研究和讨论了无螺旋永磁体的MLS的性能和生产率。MLS是在相同大小和基本设计参数下设计的。显示并比较了MLS的推力和扭矩特性的分析结果，并通过零件数量评估了它们的生产率。©2021日本电气工程师学会。由Wiley Periodicals LLC发布。