Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Magnetically Excited Piezoelectric Energy Harvester for Micropower Supply and Wakeup Applications

: Gojdka, B.; Dankwort, T.; Nowak, M.A.; Bodduluri, M.T.; Ahmed, M.; Grünzig, S.; Lofink, F.


21st International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2021 : Orlando, Florida, USA 20-24 June 2021
Piscataway, NJ: IEEE, 2021
ISBN: 978-1-6654-4845-1
ISBN: 978-1-6654-1267-4
International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers) <21, 2021, Online>
Conference Paper
Fraunhofer ISIT ()

A miniaturized, magnetically actuated MEMS energy harvester with a high power density is presented. The device can be excited contactless and at low frequencies thanks to an efficient frequency-up conversion. These characteristics render the harvester suitable for various applications like a compact micropower supply in the sense of classical energy harvesting, but also as a near-zero power wakeup device and for energy transfer in inaccessible locations. Power output up to 100 W in resonance is reported. Pulse-like excitation in the frequency-up conversion scheme yields open-circuit voltages of up to 4 V. A near-zero power wakeup for stand-alone systems like sensor nodes is demonstrated with a wakeup time of 20 ms and 0.1 nW power consumption when deactivated.