基于电磁阻尼的振动能量回收装置研究

Research on vibration energy harvesting device based on electromagnetic damping

针对水平方向振动体的能量回收问题,设计一种基于电磁阻尼的振动能量回收装置,装置主要包括振动台、电磁阻尼器和稳压电路。有别于传统的重力方向上的电磁振动体能量收集装置,水平方向运动的振动台更有利于模拟高层建筑的实际的振动环境;为了减小滑动摩擦带来的能量损耗,设计了基于滚动轴承的电磁阻尼器;针对传统能量回收装置中单个线圈收集的能量功率偏低问题,提出增加单只线圈匝数和多只线圈串联的改进方法。在此基础上,设计了低功耗稳压电路,极大地提高了能量转换效率。实验表明:装置收集的能量输出功率可达20mW,为低功耗无线传感器节点供电提供了一种解决方案。

Aiming at the energy harvesting of the horizontal vibrating body,a vibration energy harvesting device based on electromagnetic damping has been designed.The device mainly includes a vibration table,an electromagnetic damper and a voltage stabilizing circuit.Different from the traditional electromagnetic vibrating body energy collection device in the direction of gravity,the horizontally moving vibration table is conducive to most simulating vibration environment of real high-rise buildings;in order to reduce the energy loss caused by sliding friction,an electromagnetic damper that was based on rolling bearings has been designed;in view of the low energy power collected by a single coil in the traditional energy harvesting device,it is proposed to increase the number of single coil turns and connect coils in series.On this basis,a low-power and voltage regulator circuit was made out,which greatly improved the energy conversion efficiency.Experiments showed that the energy output power harvested by the device could reach 20mW,which provideed a solution for powering low-power wireless sensor nodes.