采用多种设计方案降低移动磁体型直线直流电动机的推力波动

The Reduction of Thrust Ripples in the Moving Magnet Type LDM by Various Design Scheme

本文介绍了一种无刷无槽直流直线电动机 ,它采用了一组可移动的钕铁硼型磁体 ,具有单位重量推力大、位置控制精确等优点 ,但由于端部效应和边缘效应产生了推力波动。文中提出了一种合理的线圈激磁布局 ,由此抑制了端部效应。文中也讨论了与永磁体有关的最佳尺寸。这样 ,推力波动降到了最小。提出的设计结果得到了实验的验证。

A brushless and slotless DC linear motor employing a movable set of neodymium iron boron type magnets has a high performance with advantages of large thrust per weights and accurate position control, but produces thrust ripples owing to mainly end effects, fringing effect. This paper presents the reasonable coil exciting topology by which end effect is suppressed. The relative optimal dimension of permanent magnet (PM) is also proposed. From this work, the thrust ripple can be minimized. The result of the proposed design has been confirmed by experiment.