ABSTRACT

The principle of piezoelectricity has been used to design the micro-electro-mechanical system-based piezoelectric energy harvester for generating electrical energy from surrounding vibrations. The huge popularity of these energy harvesters (EHs) is due to their small size. This paper designs the EH for the heating, ventilation, and air conditioning system. Different cantilever structures with different shapes of the same fabricated area have been designed and investigated at an excited acceleration of 1 g (9.8 ms⁻²). The multi-perforated cantilever structure has the better stress distribution within the cantilever structure and generates better output voltage and power than their basic design. The proposed tapered multi-perforated cantilever structure has the least value of the resonant frequency of 98.59 Hz which is 31.13% less than the rectangular cantilever structure. The proposed structure generates the output voltage of 14 V which is 91.78% higher than the basic rectangular cantilever structure. It also generates the average output power of 7.15 µW which is 213.59% higher than basic rectangular cantilever structure.

摘要

压电原理已被用来设计基于微机电系统的压电能量收集器，用于从周围振动产生电能。这些能量采集器 (EH) 因其体积小而广受欢迎。本文设计了供暖、通风和空调系统的EH。设计并研究了在 1 g (9.8 ms ^-2）。多孔悬臂结构在悬臂结构内具有更好的应力分布，并且比其基本设计产生更好的输出电压和功率。所提出的锥形多孔悬臂结构的共振频率最小值为98.59 Hz，比矩形悬臂结构低31.13%。所提出的结构产生 14 V 的输出电压，比基本矩形悬臂结构高 91.78%。它还产生 7.15 µW 的平均输出功率，比基本矩形悬臂结构高 213.59%。