Simulação de circuitos a base de amplificadores operacionais para colheita de energia

Abstract

The present work presents the evaluation of the computational model of two circuits based on operational amplifiers, for the utilization of mechanical energy generated by vibrations present in the environment through piezoelectric materials. This process of converting wasted mechanical energy into usable electrical energy is called energy harvesting. Due to the fact that the piezoelectric material has a capacitive nature, to increase the efficiency of the harvesting circuit it is necessary to cancel such reactance using inductors, and the typical operation at low frequencies for vibration harvesting systems implies a high value of inductive reactance, thus we used two configurations of electronic circuits of synthetic inductors based on operational amplifiers to achieve such values. Through these configurations and in order to analyze computationally this type of generation, this work contributed by demonstrating the formation law of the operational amplifier-based synthetic inductor and investigated the proposed circuits applied to the extraction of energy from isolated pulses, repeated pulses and sine tones, given the results, the capacity of energy extraction of the topologies evaluated was proven, highlighting the potential of this line of research.