Modeling and Analysis of the Power Conditioning Circuit for an Electromagnetic Human Walking-Induced Energy Harvester

Arias, Ludwin Molina; Iwaniec, Joanna; Iwaniec, Marek

doi:10.3390/en14123367

Cited by 8 publications

(4 citation statements)

References 37 publications

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“…Since electric current, voltage, and damping force are variables that depend on the form of connection between the coils and the external load, the model must take into account the interaction between the energy conversion device and the power conditioning circuit employed [24]. In this work, the EID is connected to an AC-DC rectifier followed by a step-up and step-down converter that adjusts the output voltage level to the required value.…”

Section: Joint Clearance Modelingmentioning

confidence: 99%

Investigation Into the Effect of Joint Clearance on the Dynamics of a Biomechanical Energy Harvesting System

Arias

Iwaniec

2023

IEEE Access

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The existing clearance in the mechanical joints plays a crucial role in the assembly of mechanical systems, allowing the mobility of its components. However, few studies have explored models that consider joint clearance in the case of electromechanical energy harvesting systems. This paper examines the effect of existing clearance in an electromagnetic energy harvester attached to the human lower limb. The dynamic response of the system and an estimate of its generated power are obtained by developing a lumped model, in which clearance is included by adding a dead band and assigning a stiffness coefficient during contact between elements. The natural motion of the lower limb is the input to the formulated model, which takes into account the nonlinear interaction of the electromagnetic device and the power conditioning circuit. Central composite design is used to study the influence of two selected factors on the dynamics of the system; joint clearance size and contact stiffness. The results suggest that the presence of clearance between the clamping mechanism and the human body positively affects the performance of the analyzed electromagnetic energy harvesting system. It was revealed that an increase of around 27% of output power could be intentionally achieved by adding larger clearance sizes.

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Section: Joint Clearance Modelingmentioning

confidence: 99%

Investigation Into the Effect of Joint Clearance on the Dynamics of a Biomechanical Energy Harvesting System

Arias

Iwaniec

2023

IEEE Access

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“…Figure 11a shows the total damping forces with different resistances under harmonic excitation. The motion bifurcation threshold can be distinguished and acquired using the nonlinear dynamics model or calculated by Equations ( 13) and (15). The force change is nonlinear as the resistance changes.…”

Section: Average Power Analysis Of Different Resistancesmentioning

confidence: 99%

“…The mechanical electromagnetic method is also referred to as an energy harvesting shock absorber (EHSA) [14].EHSAs have two types. These are often classified as linear and rotational EHSAs, also referred to as direct-drive [1,15,16] and indirect-drive EHSA models [17]. In linear EHSAs, the linear movement is utilized to turn the mechanical energy into electric energy.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Power Flow Characterization of Energy Harvesting Shock Absorbers by Considering Motion Bifurcation

Wang

Gao

et al. 2022

Energies

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Vibration energy harvesting technology can capture ambient energy forms. Using an energy harvesting shock absorber (EHSA) is one of the methods to achieve this function. The EHSA with mechanical motion rectifier (MMR) has motion bifurcation, which can improve energy harvesting performance and reduce the impact between gears. However, the motion bifurcation makes it difficult to quantitatively predict the vibrational energy dissipation and energy harvesting of the MMR−EHSA. Evaluating the performance of an MMR−EHSA during the design phase becomes highly complex. In this paper, a novel nonlinear dynamics model of MMR−EHSAs is established to solve motion bifurcation and quantitative power flow. Furthermore, the proposed MMR−EHSA prototype is fabricated, and dynamics testing is initiated to verify the theoretical model under harmonic vibration. The testing results show that the theoretical model can predict the working characterization of MMR−EHSAs. The resistance of optimal harvesting energy and maximum damping power is revealed by the quantitative power flow model under harmonic vibration. In addition, the working performance under random vibration is discussed. The proposed nonlinear dynamics model has advantages when solving random vibration input and has potential for practical application.

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“…The harvester managed to generate 0.3-2.46 mW of power from human body motion, and supplied body-worn sensors or electronic devices. A similar issue was considered in [6]. The authors conducted a theoretical study of an electromagnetic transducer with a conditioning circuit (full-bridge rectifier and buck-boost converter with a resistance load) which was able to generate power in the range of 1.4 mW to 90 mW.…”

Section: Introductionmentioning

confidence: 99%

Advanced Prototype of an Electrical Control Unit for an MR Damper Powered by Energy Harvested from Vibrations

2022

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The work deals with a newly developed prototype of an electrical control unit (ECU) for a magnetorheological (MR) damper powered by energy harvested from vibrations. The ECU, consisting of a rectifying bridge, a driver unit, a microcontroller, and an internal power supply system, is an advanced version of the specially designed processing system for energy harvested from vibrations and the use of this energy to control the MR damper. Unlike a typical MR damper control system in which electrical circuits are powered from an external energy source, the ECU is powered by a part of the energy extracted from a vibrating system using an electromagnetic harvester. However, the excess amount of energy recovered over that necessary to power the MR damper and electrical circuits can be collected in harvested energy storage. The study presents the design concept of the ECU, computer simulations of the in-built driver unit (DU), the method of connecting the ECU with the harvester, the MR damper and displacement sensors, and also describes experimental tests of the engineered unit applied in a vibration reduction system (VRS) with an energy recovery function.

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Modeling and Analysis of the Power Conditioning Circuit for an Electromagnetic Human Walking-Induced Energy Harvester

Cited by 8 publications

References 37 publications

Investigation Into the Effect of Joint Clearance on the Dynamics of a Biomechanical Energy Harvesting System

Investigation Into the Effect of Joint Clearance on the Dynamics of a Biomechanical Energy Harvesting System

Quantitative Power Flow Characterization of Energy Harvesting Shock Absorbers by Considering Motion Bifurcation

Advanced Prototype of an Electrical Control Unit for an MR Damper Powered by Energy Harvested from Vibrations

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