scholarly journals Theoretical and Experimental Investigations of a Pseudo-Magnetic Levitation System for Energy Harvesting

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1623
Author(s):  
Krzysztof Kecik ◽  
Andrzej Mitura
Keyword(s):  
Energy Harvesting ◽  
Electromechanical Coupling ◽  
Magnetic Levitation ◽  
Continuation Method ◽  
Harmonic Balance Method ◽  
Path Following ◽  
Experimental Investigations ◽  
System Response ◽  
Electrical Systems ◽  
Magnetic Levitation System

The paper presents an analytical, numerical and experimental analysis of the special designed system for energy harvesting. The harvester system consists of two identical magnets rigidly mounted to the tube’s end. Between them, a third magnet is free to magnetically levitate (pseudo-levitate) due to the proper magnet polarity. The behaviour of the harvester is significantly complicated by a electromechanical coupling. It causes resonance curves to have a distorted shape and a new solution from which the recovered energy is higher is observed. The Harmonic Balance Method (HBM) is used to approximately describe the response and stability of the mechanical and electrical systems. The analytical results are verified by a numerical path following (continuation) method and experiment test with use of a shaker. The influence of harvester parameters on the system response and energy recovery near a main resonance is studied in detail.

On Energy harvesting from nonlinear Vibrations of a magnetic levitation system excited by an Electromechanical shaker

2015 ◽  
Author(s):  
Hassan Costa Arbex ◽  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset ◽  
Vinícius Piccirillo ◽  
Reyolando Manoel Lopes Rebello da Fonseca Brasil ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Nonlinear Vibrations ◽  
Magnetic Levitation ◽  
Levitation System ◽  
Magnetic Levitation System

Energy harvesting from a magnetic levitation system

2017 ◽  
Vol 94 ◽  
pp. 200-206 ◽  
Author(s):  
Krzysztof Kecik ◽  
Andrzej Mitura ◽  
Stefano Lenci ◽  
Jerzy Warminski
Keyword(s):  
Energy Harvesting ◽  
Magnetic Levitation ◽  
Levitation System ◽  
Magnetic Levitation System

Rotational nonlinear double-beam energy harvesting

2021 ◽  
Author(s):  
Zeqi Lu ◽  
Fei-Yang Zhang ◽  
Hailing Fu ◽  
Hu Ding ◽  
Li-Qun Chen
Keyword(s):  
Theoretical Model ◽  
Energy Harvesting ◽  
Rotational Motion ◽  
Beam Energy ◽  
Continuation Method ◽  
Harmonic Balance Method ◽  
Lagrange Equations ◽  
Wide Range ◽  
Double Beam ◽  
Lower Beam

Abstract This paper presents an investigation of the performance of a coupled rotational double-beam energy harvester (DBEH) with magnetic nonlinearity. Two spring-connected cantilever beams are fixed on a rotating disc. Repelling magnets are attached to the frame and to the lower beam tip, and an equal-mass block is attached to the tip of the upper beam. To describe the dynamic response, a theoretical model related to the rotational motion of the coupled cantilever beam is derived from the Lagrange equations. In addition, the harmonic balance method, together with the arc-length continuation method, is applied to obtain the frequency response functions (FRFs). Parametric studies are then conducted to analyze the effect of varying the parameters on the energy harvesting performance, and numerical analysis is performed to validate the analytical solutions. Finally, the theoretical model is verified by forward- and reverse-frequency-sweeping experiments. The DBEH in rotational motion can perform effective energy harvesting over a wide range of rotational frequencies (10 to 35 rad/s). The upper beam is found to exhibit better energy harvesting efficiency than the lower beam around the resonant frequency. This study effectively broadens the energy harvesting bandwidth and provides a theoretical model for the design of nonlinear magnet-coupled double-beam structure in rotational energy harvesting.

Piezoelectric Nonlinear Energy Sink for Energy Harvesting With Rectifying DC Interface Circuit

2018 ◽  
Author(s):  
Liuyang Xiong ◽  
Lihua Tang ◽  
Kefu Liu ◽  
Brian R. Mace
Keyword(s):  
Energy Harvesting ◽  
Electromechanical Coupling ◽  
Circuit Simulation ◽  
Harmonic Balance Method ◽  
Nonlinear Energy Sink ◽  
Harmonic Excitation ◽  
Interface Circuit ◽  
Dc Power ◽  
Energy Sink ◽  
Nonlinear Energy

In order to improve the performance of vibration energy harvesters over a broad frequency range, this paper proposes a use of piezoelectric nonlinear energy sink (NES) for energy harvesting from ambient vibrations. A standard rectifying direct current (DC) interface circuit is considered to generate DC power from the piezoelectric NES under harmonic excitation. Harmonic balance method is used to obtain the dynamic response and energy harvesting performance of the proposed piezoelectric NES, verified by the equivalent circuit simulation. Analytical and numerical results show that the design, by applying NES, improves the efficiency of energy harvesting without increasing the vibration of the primary structure in a broadband manner. The effects of the electromechanical coupling, excitation level and load resistance on the magnitude and bandwidth of the output DC power are investigated.

Energy Harvesting Using a Torsional Mode L-Shaped Unimorph Structure: Modeling and Experimental Investigations

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Haisheng Li ◽  
Donghuan Liu ◽  
Jianjun Wang ◽  
Xinchun Shang
Keyword(s):  
Energy Harvesting ◽  
Electromechanical Coupling ◽  
Mechanical Vibration ◽  
Beam Theory ◽  
Experimental Investigations ◽  
Base Excitation ◽  
Torsional Mode ◽  
Plane Base ◽  
Bending Mode ◽  
Out Of Plane

Abstract Previous studies have proved that the piezoelectric L-shaped beam-mass structure is a good candidate to harvest energy from ambient mechanical vibration. However, most researches merely focused on bending mode of the structure, which only can capture energy from in-plane base excitation. To fully exert the advantages of L-shaped harvesters, this paper will explore their energy harvesting performance on torsional mode with out-of-plane base excitation. The electromechanical coupling governing equation of the L-shaped harvester in torsional mode is derived by applying Gauss's law and the Euler–Bernoulli beam theory with linear assumption, and the analytical results are also validated with experimental results. In addition, the influences of key geometric parameters on the resonance frequency and output voltage of the harvester are also presented. This work demonstrates the feasibility of utilizing torsional mode of the L-shaped unimorph structure to harvest energy from out-of-plane mechanical vibration, which shows the potential of designing multi-directional and multi-frequency L-shaped harvesters.

On a non-ideal magnetic levitation system: nonlinear dynamical behavior and energy harvesting analyses

2019 ◽  
Vol 95 (4) ◽  
pp. 3423-3438 ◽  
Author(s):  
Rodrigo Tumolin Rocha ◽  
Jose Manoel Balthazar ◽  
Angelo Marcelo Tusset ◽  
Silvio Luiz Thomaz de Souza ◽  
Frederic Conrad Janzen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Magnetic Levitation ◽  
Dynamical Behavior ◽  
Nonlinear Dynamical ◽  
Levitation System ◽  
Magnetic Levitation System

scholarly journals Energy Recovery from a Non-Linear Electromagnetic System

2018 ◽  
Vol 12 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Krzysztof Kęcik
Keyword(s):  
Energy Harvesting ◽  
Energy Recovery ◽  
Magnetic Levitation ◽  
Period Doubling ◽  
Stability Loss ◽  
Dynamic Vibration Absorber ◽  
Electromagnetic System ◽  
Coil Resistance ◽  
Magnetic Levitation System ◽  
The Stability

AbstractThe paper presents study of a pseudo-magnetic levitation system (pseudo-maglev) dedicated for energy harvesting. The idea rely on motion of a pseudo-levitating magnet in a coil’s terminal. The study based on real prototype harvester system, which in the pendulum dynamic vibration absorber is applied. For some parameters, the stability loss caused by the period doubling bifurcation is detected. The coexistence of two stable solutions, one of which is much better for energy harvesting is observed. The influence of the pseudo-maglev parameters on the recovered current and stability of the periodic solutions is presented in detail. The obtained results show, that the best energy recovery occurs for the high pseudo-maglev stiffness and close to the coil resistance. The amplitude’s excitation, the load resistances and the coupling coefficient strongly influence on the system’s response.

Sign in / Sign up

Export Citation Format

Share Document