Control and structural health monitoring sensors are becoming increasingly common in industrial and household applications due to recent advances reducing their manufacturing costs, size and power consumption. Nevertheless, providing power for these sensors poses a key challenge to engineers, particularly in system locations where limited access renders regular maintenance infeasible due to high associated costs. In the present work, the design and physical prototype testing of a nonlinear electromagnetic vibration energy harvester is presented based on a previously reported concept of the authors. The harvester is activated by the torsional speed fluctuations of a rotating shaft. Experimental testing in a rig driven by an electric motor confirms the harvester’s properties and the modelled oscillatory behaviour. This novel rotational vibration energy harvester concept may generate over 10 mW of electrical power for a broadband speed range of approximately 400 rpm (in the examined rotational system with set fluctuating speed) for wireless sensing purposes on rotating shafts.

由于最近的发展降低了其制造成本，尺寸和功耗，控制和结构健康监测传感器在工业和家庭应用中变得越来越普遍。然而，为这些传感器提供电源给工程师带来了关键的挑战，特别是在系统位置，由于高昂的相关费用，有限的访问权限使得定期维护变得不可行。在当前的工作中，基于作者先前报告的概念，介绍了非线性电磁振动能量采集器的设计和物理原型测试。收割机通过旋转轴的转速波动来激活。在由电动机驱动的钻机上进行的实验测试证实了收割机的性能和所模拟的振荡行为。