This article focuses on the design of a magnetic sensor (MS) in position detection of a permanent magnet linear motor (PMLM). The MS is composed of a hall-effect-integrated-circuit and magnetic materials, and it is well known as a contactless sensor with a simple structure, and low cost. As a result, it is preferred for precise linear positioning applications. The work presented in this article consists of the following three steps to achieve high accuracy and economy in the mover position detection for a PMLM. First, the initial design of the MS is described which has been optimized using response surface methodology to obtain very low total harmonic distortion value of the sensing signal. Second, the leakage flux of PMLM is analytically investigated, from which it is determined that shielding the leakage flux is most appropriate to ensure the accuracy of the MS. Finally, in an attempt to reduce manufacturing cost, three MS prototypes using different materials (silicon steel laminated core, steel solid core, and ferrite solid core) are fabricated and tested. To verify the analytical results, several experiments are conducted. The experimental data prove that the accuracy of the MS is sufficient to use for mover position detection for the PMLM.

中文翻译：

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考虑边缘效应的永磁直线电机磁传感器设计

本文重点介绍永磁直线电机 (PMLM) 位置检测中磁传感器 (MS) 的设计。MS由霍尔效应集成电路和磁性材料组成，是众所周知的结构简单、成本低的非接触式传感器。因此，它是精确线性定位应用的首选。本文介绍的工作包括以下三个步骤，以实现 PMLM 动子位置检测的高精度和经济性。首先，描述了 MS 的初始设计，该设计已经使用响应面方法进行了优化，以获得非常低的传感信号总谐波失真值。其次，分析研究了 PMLM 的漏磁通，从中确定屏蔽漏磁通最适合保证MS的精度。最后，为了降低制造成本，制造并测试了使用不同材料（硅钢叠片铁芯、钢实心铁芯和铁氧体实心铁芯）的三个 MS 原型。为了验证分析结果，进行了多次实验。实验数据证明，MS 的精度足以用于 PMLM 的动子位置检测。