A Review of Piezoelectric Vibration Energy Harvesting with Magnetic Coupling Based on Different Structural Characteristics

Abstract

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.

Parametric and Experimental Modeling of Axial-Type Piezoelectric Energy Generator with Active Base

“…The LTS -01 laboratory test setup for studying the output characteristics of an axial-type PEG consists of an exciter of mechanical vibrations-an electromagnetic vibrator VEB Robotron 11,077 (4), on a work Table 5, on which the studied PEG sample was installed. The sample under study is a plate ( 14) fixed on the base (12). On the plate (12), there are two pairs of piezoelectric elements (17) made in the form of a bimorph.…”

“…The sample under study is a plate ( 14) fixed on the base (12). On the plate (12), there are two pairs of piezoelectric elements (17) made in the form of a bimorph. At the left end of the plate base, there were cylindrical-type piezoelectric elements having a longitudinal arrangement along the main PEG axis.…”

“…Basic information about energy generators, as well as problems arising in the development of energy storage devices using piezoelectric elements, were discussed in review articles [11][12][13][14][15]. The primary analysis of review articles shows that models are considered that use piezoelectric elements operating in compression and buckling with tension.…”

“…As the literature reviews [12][13][14][15][16][17] show, the most common element in the generator is a cantilever or a linear type element that is fixed at one or two points. There are schemes with fastening of bending elements in the form of a truss structure.…”

Theoretical and Experimental Investigation of a Rotational Magnetic Couple Piezoelectric Energy Harvester

“…Piezoelectric materials have the advantages of directly generating available voltage, simple structure, small mechanical damping coefficient, high energy conversion efficiency, ease to achieve miniaturization and integration, etc. Therefore, piezoelectric energy harvesting has been studied by many scholars [1,2]. For example, Moradian et al proposed a battery-less wireless Micro-Electro-Mechanical (MEMS)-based respiration sensor that can be applied in the medical field [3].…”