Self-powered boost-converter for power optimisation and piezo garden lights

Abstract

This study gives a thorough model for a small vibration powered piezoelectric device (PD) and analysis modes of operation and control of a self-powered boost converter circuit (SPBC) for the goal of tracking the PD’s finest functioning points. The concept defines the power dependency of the PD on mechanical excitation and frequency, and it aids in the design of load behaviour for power optimisation. With a fundamental control circuit, the electrical nature of the input (i.e. PD) of an SPBC circuit in the discontinuous current mode is found to be in perfect configuration with the studied optimisation requirements. The performance of the proposed SPBC circuit is studied in terms of both simulation and experiment. Firstly, the performance of the SPBC on optimisation of the PD is investigated using a mechanical shaker. Then, the proposed circuit’s ability to charge a battery, which can be used in piezo garden lights with low-frequency applicability, is also investigated. The proposed circuit and control can also be utilised to optimise electromagnetic applications.