Tunable unipolar synchronized electric charge extraction strategy for piezoelectric energy harvesting

Abstract

This article focuses on an intelligent control strategy to improve the performances of shunt-rectifier architectures for vibration energy harvesting. It demonstrates how proper tuning can improve the frequency bandwidth and maximum power of unipolar synchronized electric charge extraction architectures. For resonators with strong enough coupling (k 2 Q. p=2), tuning the duration of charge extraction with the oscillation frequency improves the power harvesting performances. The main differences with other similar solutions such as unipolar synchronized electric charge extraction without tuning strategy or tunable synchronized electric charge extraction are illustrated. In particular, we show how the choice of the shunt rectifier significantly affects the power response of the generator due to electromechanical coupling phenomenon. The analytical study is experimentally validated on a cantilever-based piezoelectric generator.

Maximum power point of piezoelectric energy harvesters: a review of optimality condition for electrical tuning

“…Capital letters will refer to normalized quantities, whereas small variable letters will refer to the physical (non-normalized) quantities. This normalization has already been proposed in previous works like [51] and makes the mathematical treatment of the problem much simpler, as the reader will notice in this section. In this article, as in most previous works, we choose to neglect the dielectric losses in the piezoelectric layer [24].…”

“…Such a modification is not possible in the load adaptation architecture. Amongst the architectures which enter is the category of 2-stage topology, one may find in the literature: SECE (either classical, tunable [51,24] and/or unipolar or PSSECE) or rectifier-free SECE (either classical or tunable) [68,69], as previously illustrated in Figure 1.…”

“…When required, their meaning is given in the following sections. [50] Synchronized Electric Charge Extraction with N extraction events by period PSSECE [25] Phase-shifted Synchronized Electric Charge Extraction SECPE [41] Synchronized Electric Charge Partial Extraction Tunable SECE [24] Tunable Synchronized Electric Charge Extraction Tunable USECE [51] Tunable Unipolar Synchronized Electric Charge Extraction USECE [38] Unipolar SECE In section 2, we start by an analysis to explain the hierarchy proposed in Figure 1. In section 3, we summarize the full mathematical background that is required to develop efficient MPPT strategies, following a similar approach as Halvorsen et al [8] or Hosseinloo et al [9].…”

Monitoring of bolt looseness using piezoelectric transducers: Three-dimensional numerical modeling with experimental verification

“…Compared to current methods of detecting bolt looseness in industries, such as the vision method (Huynh et al, 2019; Lei et al, 2018; Wang et al, 2019a) and percussion approach (Kong et al, 2018; Wang et al, 2019b), the emerging structural health monitoring (SHM) approaches (Annamdas et al, 2017; Kuok and Yuen, 2019; Li et al, 2019a; Pan et al, 2019) that employ integrated sensors (Chen et al, 2018; Liao and Chiu, 2019; Xu et al, 2019) have attracted much attention since they have capacity to implement online or real time monitoring (Feng et al, 2018; Mańka et al, 2016; Wang et al, 2018a). Among the sensors used in SHM, piezoelectric transducers have received much attention because of its wide bandwidth (Kong et al, 2017a; Lu et al, 2018; Xu et al, 2018), energy harvesting (Brenes et al, 2019; Park et al, 2008; Wang, 2013; Wang and Shen, 2019), and dual sensing and actuation functions, which enable piezoelectric transducers’ ability to generate and detecting stress waves (Dziendzikowski et al, 2018; Huo et al, 2017a; Kong et al, 2017b; Li et al, 2019b). Stress wave–enabled methods have been widely used in SHM (Fan et al, 2016; Jung and Park, 2018; Wang et al, 2009; Wang and Hao, 2014; Zhang et al, 2018).…”

Piezoelastic PVDF/TPU Nanofibrous Composite Membrane: Fabrication and Characterization

“…The piezoelectric effect is considered a unique property that allows materials to convert mechanical energy into electrical energy and vice versa. This particular property has been strongly supported for energy harvesting applications [8,9,10,11,12,13]. The stimulation for piezoelectric materials can be supplied by human walking, rain, wind, or waves [14].…”