Vidal Enrique García, Muñoz Diego Ramírez, Arias Sergio Iván Ravelo, Moreno Jaime Sánchez, Cardoso Susana, Ferreira Ricardo, Freitas Paulo
Department of Electronics Engineering, University of Valencia, 46010 Valencia, Spain.
INESC Microsystems and Nanotechnologies (INESC-MN), Institute for Nanosciences and Nanotechnologies, 1000-029 Lisbon, Portugal.
Materials (Basel). 2017 Sep 26;10(10):1134. doi: 10.3390/ma10101134.
In the present work, the design and microfabrication of a tunneling magnetoresistance (TMR) electrical current sensor is presented. After its physical and electrical characterization, a wattmeter is developed to determine the active power delivered to a load from the AC 50/60 Hz mains line. Experimental results are shown up to 1000 W of power load. A relative uncertainty of less than 1.5% with resistive load and less than 1% with capacitive load was obtained. The described application is an example of how TMR sensing technology can play a relevant role in the management and control of electrical energy.
在本工作中，展示了一种隧穿磁阻（TMR）电流传感器的设计与微纳制造。在对其进行物理和电学表征之后，开发了一种功率计，用于确定从交流50/60 Hz市电线路输送到负载的有功功率。给出了高达1000 W功率负载的实验结果。在电阻性负载下获得了小于1.5%的相对不确定度，在电容性负载下获得了小于1%的相对不确定度。所描述的应用是TMR传感技术如何在电能管理和控制中发挥重要作用的一个实例。
