Electromechanical Energy Scavenging from Current-Carrying Conductors
Electromechanical Energy Scavenging from Current-Carrying Conductors
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DOI：
10.1109/jsen.2012.2211868
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发表时间：
2013-01-01
影响因子：
4.3
通讯作者：
Wright, Paul K.
中科院分区：
文献类型：
--
作者：
Paprotny, Igor;Xu, Qiliang;Wright, Paul K.
本文描述了一种用于电力系统传感应用的清除能量的新方法，该方法使用永磁体，该永磁体与流经附近导体的交流电产生的磁场相耦合。由此产生的机械能通过压电转导转化为电能。这种机电交流能量清除方法是一种有吸引力的替代方案，以线圈为基础的交流能量清除器，在情况下，清除器不能包围导体。在这种情况下，机电式交流能量清除器具有比类似的基于线圈的方法产生更大功率的潜力。详细描述了机电交流能量清除器的组成，并给出了在我们实验室制造和测试的原型的实验数据。每个20厘米(3)的原型从附近20安的电流中产生高达2.7兆瓦的功率。将机电交流能量清除器的理论功率密度与代表性的基于线圈的方法的功率密度进行了比较，结果表明，在某些情况下，机电交流能量清除器比基于线圈的交流能量清除器产生的功率大一个数量级。本文表明，机电交流能量清除是一种潜在的方法，为小型低成本的粘贴式无线传感器网络供电。
This paper describes a novel method for scavenging energy for electric power systems sensing applications by the use of permanent magnets that couple to the magnetic field generated by an alternating current flowing through a nearby conductor. The resulting mechanical energy is converted to electrical energy using piezoelectric transduction. This electromechanical AC energy scavenging method is an attractive alternative to coil-based AC energy scavengers in cases where the scavengers cannot encircle the conductor. In such cases, the electromechanical AC energy scavenger has the potential to produce significantly more power than comparable coil-based methods. The components of an electromechanical AC energy scavenger are described in detail, and experimental data from prototypes that are fabricated and tested in our laboratory are shown. The 20 cm(3) prototypes generated up to 2.7 mW of power each from 20 A of nearby current. Theoretical power densities of electromechanical AC energy scavengers are compared to the power densities of representative coil-based methods, showing that in some cases the electromechanical AC scavengers can generate an order-of-magnitude more power than coil-based AC scavengers. This paper demonstrates that electromechanical AC energy scavenging is a potential method for powering small size low cost stick-on wireless sensor networks.