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A self-adaptive and self-sufficient energy harvesting system

Title data

Mösch, Mario ; Fischerauer, Gerhard ; Hoffmann, Daniel:
A self-adaptive and self-sufficient energy harvesting system.
In: Sensors. Vol. 20 (May 2020) Issue 9 .
ISSN 1424-8220
DOI: https://doi.org/10.3390/s20092519

Abstract in another language

Self-adaptive vibration energy harvesters convert the kinetic energy from vibration sources into electrical energy and continuously adapt their resonance frequency to the vibration frequency. Only when the two frequencies match can the system harvest energy efficiently. The harvesting of vibration sources with a time-variant frequency therefore requires self-adaptive vibration harvesting systems without human intervention. This work presents a self-adaptive
energy harvesting system that works completely self-sufficiently. Using magnetic forces, the axial load on a bending beam is changed and thus the resonance frequency is set. The system achieves a relative tuning range of 23% at a center frequency of 36.4 Hz. Within this range, the resonance frequency of the harvester can be set continuously and precisely. With a novel optimized method for frequency measurement and with customized electronics, the system only needs 22 μW to monitor the external vibration frequency and is therefore also suitable for environments with low
vibration amplitudes. The system was verified on a vibrational test bench and can easily be tailored to a specific vibration source.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Vibration energy harvesting; self-adaptive; self-sufficient; electromagnetic; frequency measurement; microgenerator
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 05 May 2020 06:26
Last Modified: 05 May 2020 06:26
URI: https://eref.uni-bayreuth.de/id/eprint/55093