Effect of Nonlinear Electromechanical Coupling in Magnetic Levitation Energy Harvester

Abstract

This paper investigates the possibility of converting vibrations to electricity. A numerical and an experimental study of a magnetic levitation harvester are proposed. The system can be highly efficient when the electrical parameters are correctly tuned. Mechanical and electrical interaction of the harvester is described by an electromechanical coupling. Fixed value, linear and nonlinear electromechanical coupling models are presented and compared. It has been shown that the nonlinear electromechanical coupling model is more suitable for higher oscillations of the magnet. The obtained results show that nonlinear resonance and recovered energy can be controlled by the simple configuration of the magnet coil position. The recovered energy from the top branch is significantly higher, but this solution is much harder to obtain.

Two-dimensional elliptically shaped electromagnetic vibration energy harvester

“…Overall the physics of the 2D-EMVEH is similar to that of 1D-EMVEHs devices, and the same equation of motion applies, except that the motion now occurs in two dimensions and the magnetic force depends on the (𝑥, 𝑦)-position of the free-to-move magnet. Likewise, the electromagnetic damping from the coil windings is also similar to 1D-EMVEH models [12,31], which depends on the relative position of the free-to-move magnet with respect to the coil winding. Thus, the 2D-EMVEH is like the 1D-EMVEH, a magnetic spring-like system with a damping force from the coil windings.…”

“…The reason for this is that EMVEH harvesters are known to display hysteric behaviour if subjected to a changing frequency, i.e. the state in terms of power production and movement that the system ends up in depends on the history of frequencies that the harvester has been exposed to [8,16,31,33]. To avoid this dependency here, each experiment at a given frequency is started from rest.…”

Dynamic Lyapunov Machine Learning Control of Nonlinear Magnetic Levitation System

“…In this section, a traditional Magnetic Levitation system plant model is explored and the system dynamics equations are presented [20] and then the energy harvesting portion of the model dynamics is introduced [21].…”

Voltage Improvement of a Swing-Magnet-Type Generator for Harvesting Bicycle Vibrations

“…Energy harvesting is a sustainable technology that extracts electricity from the energy spent in daily-life activities of people [1][2][3][4][5]. Consumer products with light-emitting diodes (LEDs) attached to shoes and straps have been developed to identify their position in the dark [6,7].…”