Modelling and Analysis of Novel Shape Vibrational Piezoelectric Energy Harvester

Abstract

This paper presents a novel approach for a Micro-Electro Mechanical Systems (MEMS) based piezoelectric vibratory motion harvesting device with three degrees of freedom (DOF). The H-shaped core silicon mass is supported by two pairs of T-shaped cantilever beams positioned on both sides of the device. The mass is securely attached to four sets of folded beams that oscillate exclusively along the X axes. The mass can oscillate in both the Y and Z directions due to two sets of linear rays. The piezoelectric material has already been positioned on the surfaces of the beam. The device has the ability to convert the vibratory motion energy of the beams into electrical energy, which is then converted into voltage and travels via the rectifier circuit to recharge the battery. The device's capacity to capture vibrational energy in all three dimensions leads to a more efficient energy harvesting result. The COMSOL Multiphasic® application is utilized for both development and simulation purposes. It is suggested that MEMS based energy harvesting device can be attached to shoes, tires, or any other oscillating surfaces to extract energy from the movement generated during travel, jogging, and walking.