Jiang Junxiang, Liu Shaogang, Feng Lifeng, Zhao Dan
College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China.
School of Mechanical and Civil Engineering, Jilin Agricultural Science and Technology University, Jilin 132101, China.
Micromachines (Basel). 2021 Apr 14;12(4):436. doi: 10.3390/mi12040436.
Piezoelectric vibration energy harvesting technologies have attracted a lot of attention in recent decades, and the harvesters have been applied successfully in various fields, such as buildings, biomechanical and human motions. One important challenge is that the narrow frequency bandwidth of linear energy harvesting is inadequate to adapt the ambient vibrations, which are often random and broadband. Therefore, researchers have concentrated on developing efficient energy harvesters to realize broadband energy harvesting and improve energy-harvesting efficiency. Particularly, among these approaches, different types of energy harvesters adopting magnetic force have been designed with nonlinear characteristics for effective energy harvesting. This paper aims to review the main piezoelectric vibration energy harvesting technologies with magnetic coupling, and determine the potential benefits of magnetic force on energy-harvesting techniques. They are classified into five categories according to their different structural characteristics: monostable, bistable, multistable, magnetic plucking, and hybrid piezoelectric-electromagnetic energy harvesters. The operating principles and representative designs of each type are provided. Finally, a summary of practical applications is also shown. This review contributes to the widespread understanding of the role of magnetic force on piezoelectric vibration energy harvesting. It also provides a meaningful perspective on designing piezoelectric harvesters for improving energy-harvesting efficiency.
近几十年来，压电振动能量收集技术备受关注，且能量收集器已成功应用于建筑、生物力学和人体运动等各个领域。一个重要挑战是，线性能量收集的窄频率带宽不足以适应通常随机且宽带的环境振动。因此，研究人员专注于开发高效的能量收集器，以实现宽带能量收集并提高能量收集效率。特别是，在这些方法中，不同类型采用磁力的能量收集器已被设计成具有非线性特性，以实现有效的能量收集。本文旨在综述具有磁耦合的主要压电振动能量收集技术，并确定磁力对能量收集技术的潜在益处。根据其不同的结构特征，它们分为五类：单稳态、双稳态、多稳态、磁拨弦式和混合压电 - 电磁能量收集器。文中给出了每种类型的工作原理和代表性设计。最后，还展示了实际应用的总结。这篇综述有助于广泛理解磁力在压电振动能量收集中的作用。它还为设计压电能量收集器以提高能量收集效率提供了有意义的视角。
