Abstract

This paper discusses a complex method for determining the position of the working unit of a tubular linear motor with permanent magnets, which has become very widespread in recent years. Unlike traditional electric drive systems that convert rotary motion into translational motion by means of intermediate mechanisms, direct linear drive systems are devoid of many of the significant disadvantages associated with mechanical transmissions. One serious scientific problem associated with this type of motor is the search for methods for accurately determining the current position of the working unit on the stator that are capable of operating under limited resources of typical microcontrollers, while providing sufficient positioning accuracy. This article proposes a method for determining the position of the working unit using several Hall sensors located on the stator with a shift of 60° (relative to the stator magnetic field), as well as inexpensive analog accelerometers (accelerometers). The proposed method is based on the use of large correction tables created during the calibration process for each stator instance, as well as the use of oversampling methods to increase the effective ADC bit depth. The use of the method made it possible to achieve positioning accuracy within 1 µm, without exceeding the computing resources of a typical microcontroller.

中文翻译：

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一种提高TLPMA移动器位置检测精度的方法

摘要

本文讨论了一种用于确定带有永磁体的管状直线电动机工作单元位置的复杂方法，这种方法近年来已经非常普遍。与传统的通过中间机构将旋转运动转换为平移运动的电驱动系统不同，直接线性驱动系统没有许多与机械变速器相关的重大缺点。与这种类型的电动机相关的一个严重的科学问题是寻找一种方法，以精确地确定工作单​​元在定子上的当前位置，该方法能够在典型的微控制器的有限资源下运行，同时提供足够的定位精度。本文提出了一种使用定位在定子上且相对于定子磁场有60°位移（相对于定子磁场）的几个霍尔传感器以及廉价的模拟加速度计（加速度计）来确定工作单​​元位置的方法。所提出的方法是基于使用在每个定子实例的校准过程中创建的大型校正表，以及使用过采样方法来增加有效ADC位深度的。使用该方法可以实现1 µm以内的定位精度，而不会超出典型微控制器的计算资源。所提出的方法是基于使用在每个定子实例的校准过程中创建的大型校正表，以及使用过采样方法来增加有效ADC位深度的。使用该方法可以实现1 µm以内的定位精度，而不会超出典型微控制器的计算资源。所提出的方法是基于使用在每个定子实例的校准过程中创建的大型校正表，以及使用过采样方法来增加有效ADC位深度的。使用该方法可以实现1 µm以内的定位精度，而不会超出典型微控制器的计算资源。