Coupled Numerical Model of Vibration-Based Harvester

Abstract

Herein, the authors publish the complex design of a numerical coupled model of a vibration-based harvester that transforms mechanical vibrations into electric energy. A numerical model is based on usage of the finite element method, connecting analysis of the damped mechanical oscillation, electromagnetic field and electrical circuit. The model was demonstrated on the design of a microgenerator (MG), and then experimentally tested. The numerical model allows us to execute optimization of the design with many degrees of freedom. The transformation of the wave spreading in the form of mechanical vibrations was solved in the area of resonance of the electromechanical system.

A Robust Generator–Harvester for Independent Sensor Systems

“…Another group addresses the harvester/generator drive issues, often in relation to combustion engine functions and parts [9][10][11][12]. Yet, another set comprises articles on motion generation, the drifting of the electromagnetic part of the generator [13,14], models [18][19][20], motion principles, and appropriate experiments [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. Further categories cover the following methods and processes, respectively: the linear motion of the power unit based on the hydraulic transfer of dynamic energy to the motion element within the linear generator configuration, the generator system (kinetic-to-electrical energy conversion) and the control, modeling, simulation, measurement, and evaluation of relevant model parameters.…”

“…Stratton [1]. The use of 3D modeling and simulation, analysis, and comparisons with experimental models of a linear generator is discussed in multiple sources, including [8,[18][19][20]. The simulation and experimental verification of the parameters of the equivalent circuits and the rotor/stator core losses via the FEM are addressed in article [37].…”

“…Considering the scarcity of alternative energy sources, these may find application mainly in mobile or wireless devices [18][19][20], sensor-independent systems [3,4], autonomous sensor instruments, and systems where a stable power supply is disadvantageous or impossible to secure [3,4]. The requirement for the development and use of alternative energy source principles involves, among other factors, estimating the minimum operating time without a stable/permanent (non-mobile) distribution system.…”

“…Designing conceptual solutions to enable a highly efficient conversion of motion into electrical energy is an interesting-and already partially solved-problem. The principle of converting motion energy into electricity is based on the understanding and consistent use of the possibilities of Faraday's induction law [1], as presented in sources [3,4] and [18][19][20] and as outlined hereabove.…”

“…For this reason, residual or alternative forms of energy are then widely sought for, including, but not limited to, the expansion of compressed air and various types of linear movement. The options of converting kinetic energy into electricity comprise, for example, the electromagnetic principle based on the full Faraday effect, the result being high conversion efficiency [1,[18][19][20].…”