Abstract
This paper presents a hybrid optimization approach for the enhancement of performance of a piezoelectric energy harvesting system (PEHS). The existing PEHS shows substantial power loss during hardware implementation. To overcome the problem, this study proposes a hybrid optimization technique to improve the PEHS efficiency. In addition, the converter design as well as controller technique are enhanced and simulated in a MATLAB/Simulink platform. The controller technique of the proposed structure is connected to the converter prototype through the dSPACE DS1104 board (dSPACE, Paderborn, Germany). To enhance the proportional-integral voltage controller (PIVC) based on hybrid optimization method, a massive enhancement in reducing the output error is done in terms of power efficiency, power loss, rising time and settling time. The results show that the overall PEHS converter efficiency is about 85% based on the simulation and experimental implementations.
Highlights
Over the years, energy harvesters and converters have become an essential part of any energy harvesting system using wasted ambient energy to provide power for the anticipated future growing energy demand
A snapshot of a few cycles of the metal-oxide semiconductor field effect transistors (MOSFETs) gate switching signal obtained from the oscilloscope is illustrated in Figure 11, which shows the 10 kHz switching frequency, where one cycle of the pulse width modulation (PWM) signal is measured at 10 μs to show the hardware operation process of the piezoelectric energy harvesting system (PEHS) converter
This study proposed the implementation of a signal-phase PEHS converter prototype utilizing the dSPACE DS1104 controller board based on a hybrid optimization method
Summary
Energy harvesters and converters have become an essential part of any energy harvesting system using wasted ambient energy to provide power for the anticipated future growing energy demand. Examples of wasted ambient energy sources are wind energy, thermal energy, sound energy, vibration energy, solid waste energy and solar energy [1,2,3]. The utilization of piezoelectric components to collect energy from encompassing vibrations is one of the essential renewable energy sources, mainly for remote areas that lack power [4,5]. Due to the lack of solar energy, light efficiency might drop dramatically during overcast days, and a comparatively enormous surface region is needed relying upon the power prerequisites of the related electronic framework. A thermal energy source needs huge temperature differences to generate sufficient amounts of electrical energy. In a positive way this pollution-free and maintenance-free energy source has a long operating lifetime
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