磁电阻冲动的特征及其灵敏度 温度补偿
Diego Ramírez-Muñoz1, Rafael García-Gil1, Susana Cardoso2
1Department of Electronic Engineering, University of Valencia, Avda. de la Universitat, s/n, 46100 Burjassot, Spain.
Sensors (Basel, Switzerland)
|May 25, 2024
概括
这项研究引入了磁阻变送 (MR-shunt) 概念,使单个MR元件能够作为非散射电流传感器发挥作用. 这项创新提供了电隔离,并减少了与传统方法相比自我加热.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 传感器技术 传感器技术
背景情况:
- 用于电流传感的常规分流电阻可以导致自我加热和缺乏电隔离.
- 磁电阻 (MR) 元素通常用于Wheatstone桥梁的传感应用.
研究的目的:
- 为了证明一个单一的磁电阻 (MR) 元素可以作为电流传感器发挥作用,称为磁电阻变速器 (MR-shunt).
- 开发电子电路,以利用集成MR传感器作为MR短路,并调节其信号.
- 分析和补偿MR-shunt灵敏度的热变化.
主要方法:
- 拟议的电子电路可以将Wheatstone桥内的MR传感器作为单独的MR-shunts进行调整.
- 开发了一种调节电路,用于桥式集成和独立的MR元件,以作为电流传感器.
- 研究了热灵敏度的变化,并实施了基于硬件的热漂移补偿.
主要成果:
- 成功演示了MR-shunt概念,用于电流传感,具有电隔离和减少自热.
- 实现了温度系数的显著降低:桥梁元件的温度系数从0.348%/°C降至-0.008%/°C,单个元件的温度系数从0.474%/°C降至-0.0007%/°C.
- 验证了用于热漂移补偿的拟议电子接口的有效性.
结论:
- 该MR-shunt概念提供了一个新的,高效的和孤立的方法,使用随时可用的MR元件来进行电流传感.
- 开发的电子电路和补偿技术使得强大的MR-shunt电流传感器可以在不同温度下应用.
- 这项工作为各种电子系统中先进,紧,可靠的电流传感解决方案铺平了道路.
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