Energy Harvesting from AC Magnetic Field Using PZT Piezoelectric Cantilever Beams

Mariusz Kucharek, Bogdan Dziadak, Jacek Starzyński () and Leszek Książek
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Mariusz Kucharek: Łukasiewicz Research Network—Tele and Radio Research Institute, Ratuszowa 11 Street, 03-450 Warsaw, Poland
Bogdan Dziadak: Electrical Engineering Department, Warsaw University of Technology, Koszykowa 75 Street, 00-661 Warsaw, Poland
Jacek Starzyński: Electrical Engineering Department, Warsaw University of Technology, Koszykowa 75 Street, 00-661 Warsaw, Poland
Leszek Książek: Łukasiewicz Research Network—Tele and Radio Research Institute, Ratuszowa 11 Street, 03-450 Warsaw, Poland

Energies, 2025, vol. 18, issue 11, 1-17

Abstract: This article investigates energy harvesting methods designed to capture energy from the alternating magnetic field surrounding a current-carrying conductor. The study focuses on the use of piezoelectric transducers in both monolithic and bimorph configurations. Experimental tests were conducted using vibrating beam structures composed of a single-layer piezoelectric material as well as bimorph piezoelectric composites, both utilizing lead zirconate titanate (PZT) as the active material. The results demonstrate a significant improvement in energy harvesting efficiency when using the bimorph configuration. Specifically, the bimorph-based system generated a peak voltage of 4.26 V and a current of 127.16 μA, resulting in an RMS power output of 272.48 μW. The operating principles, signal conditioning strategies, and structural differences in the evaluated designs are discussed in detail. The outcomes indicate the potential of such systems for powering autonomous sensors in low-power industrial monitoring applications.

Keywords: energy harvesting; AC magnetic field; piezoelectric materials; magneto-mechanical-electric MME harvester; cantilever beam (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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