Effective optimization of electromagnetic energy harvesters through direct computation of the electromagnetic coupling

Cepnik, Clemens; Radler, Oliver; Rosenbaum, Sören; Ströhla, Tom; Wallrabe, Ulrike

doi:10.1016/j.sna.2011.01.023

Cited by 74 publications

(45 citation statements)

References 28 publications

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“…Therefore, the power can be determined as (8) By replacing z(t) with its equivalent equation, the equation of power yields the following (9) The energy transferred during one complete cycle of vibration is (10) where, (11) and (12) Combining equations 10, 11, and 12, the total energy during one cycle can be achieved as (13) The average power can be estimated by (14) Taking total energy into consideration, average power can also be expressed as (15) Incorporating the vibration amplitude of the mass into equation 15 gives the average power delivered to the electrical do- …”

Section: Power = Force × Velocitymentioning

confidence: 99%

Design and Fabrication of Low Frequency Driven Energy Harvester Using Electromagnetic Conversion

Lee¹,

Chung²

2013

Transactions on Electrical and Electronic Materials

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This paper describes a low frequency driven electromagnetic energy harvester (EMEH) which consists of a thin flame resistant (FR-4) planar spring, NdFeB permanent magnets, and a copper coil. The FR-4 spring was fabricated using a desk computer numerical control (CNC) 3D modeling machine. Mathematical modeling and ANSYS finite element analysis (FEA) were used totheoretically investigate the mechanical properties of the spring mass system. The proposed EMEH generates a maximum power of 65.33 μW at a resonance frequency of 8 Hz with an acceleration of 0.2 g (1 g = 9.8 m/s 2 ) and a superior normalized power density (NPD) of 77 μW /cm 3 ·g 2 .

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Section: Power = Force × Velocitymentioning

confidence: 99%

Design and Fabrication of Low Frequency Driven Energy Harvester Using Electromagnetic Conversion

Lee¹,

Chung²

2013

Transactions on Electrical and Electronic Materials

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“…Therefore keeping a small gap between these magnets is necessary. Many groups have tried to keep this gap using air, soft-magnets, or other materials [6][7][8]. But in these cases, the aspect ratio increases while comparing one magnet with another one.…”

Section: Ansys Simulationmentioning

confidence: 99%

“…To solve this problem and to increase the efficiency of the harvester, multi-pole magnets have been used by some groups [6][7][8][9]. The output voltage and power were increased in these cases, but this was accompanied by an undesirable increase in harvester size.…”

Section: Introductionmentioning

confidence: 99%

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Design and Analysis of a Vibration-Driven Electromagnetic Energy Harvester Using Multi-Pole Magnet

Munaz¹,

Chung²

2012

Journal of Sensor Science and Technology

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This paper presents the design and analysis of a vibration-driven electromagnetic energy harvester that uses a multi-pole magnet. The physical backgrounds of the vibration electromagnetic energy harvester are reported, and an ANSYS finite element analysis simulation has been used to determine the different alignments of the magnetic pole array with their flux lines and density. The basic working principles for a single and multi-pole magnet are illustrated and the proposed harvester has been presented in a schematic diagram. Mechanical parameters such as input frequency, maximum displacement, number of coil turns, and load resistance have been analyzed to obtain an optimized output power for the harvester through theoretical study. The paper reports a maximum of 1.005 mW of power with a load resistance of 1.9 kΩ for 5 magnets with 450 coil turns.

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“…Harnessing energy from environment to supply low power devices can be accomplished from sources as thermal gradients, solar radiation and vibration (Huesgen et al, 2008;Cepnik et al, 2011;Miller et al, 2011). Concerning the vibration there are three main groups of harvesters: electrostatic, electromagnetic and piezoelectric (Roundy et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Linear matrix inequalities control driven for non-ideal power source energy harvesting

Ferreira

Chavarette

Peruzzi

2015

jtam

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The dynamic model of a linear energy harvester excited by a non-ideal power source is coupled to a controller to maximum vibration adjustment. Numerical analysis is taken to evaluate the energy harvested keeping the vibration optimized for the maximum interaction to the energy source using linear matrix inequalities for control driven. The dimensionless power output, actuation power and net output power is determined. As a result, it is possible to verify that the total energy harvested via exogenous vibration using the proposed controller is increased up to 65 times when in comparison to the open loop system.

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Effective optimization of electromagnetic energy harvesters through direct computation of the electromagnetic coupling

Cited by 74 publications

References 28 publications

Design and Fabrication of Low Frequency Driven Energy Harvester Using Electromagnetic Conversion

Design and Fabrication of Low Frequency Driven Energy Harvester Using Electromagnetic Conversion

Design and Analysis of a Vibration-Driven Electromagnetic Energy Harvester Using Multi-Pole Magnet

Linear matrix inequalities control driven for non-ideal power source energy harvesting

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