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Micromachines 2013, 4(3), 286-305; doi:10.3390/mi4030286

Approaches for a Fair Comparison and Benchmarking of Electromagnetic Vibration Energy Harvesters

Laboratory of Micro Actuators, University of Freiburg, IMTEK, Georges-K¨ohler-Allee 102, 79110 Freiburg, Germany
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Received: 16 May 2013 / Revised: 24 June 2013 / Accepted: 25 June 2013 / Published: 5 July 2013
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Abstract

The performance of more than 60 different electromagnetic energy harvesters described in more than 100 publications is benchmarked. The benchmarking is based on earlier published parameters from literature as well as on two novel parameters introduced in this paper. The former allow to compare different harvester conversion principles as well as harvesters of different electrodynamic design principles. The latter consider the impact of ambient and boundary conditions for the most important sub-group, namely the resonant electrodynamic harvesters. The special consideration of how the mechanical damping and the energy conversion effectiveness depend on these conditions enables a fairer benchmarking of this common harvester type. High performing prototypes are identified, and the key parameters are provided for explanation. Finally, beneficial design approaches and the main challenges to maximize the output power are pointed out.
Keywords: review; benchmarking; figure of merit; comparison; optimization; electrodynamic energy harvesting; electromagnetic linear generators; power MEMS review; benchmarking; figure of merit; comparison; optimization; electrodynamic energy harvesting; electromagnetic linear generators; power MEMS
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Cepnik, C.; Wallrabe, U. Approaches for a Fair Comparison and Benchmarking of Electromagnetic Vibration Energy Harvesters. Micromachines 2013, 4, 286-305.

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