Optimizing the design of wide magneto-mechano-electric generators to maximize their power output and lifetime in self-powered environmental monitoring systems

Harnessing the Induced Magnetostrictive Effect in Fully Flexible Fiber-Based Magnetoelectric Composites for Improved Stray Magnetic Energy Harvesting

“…The generated power output is in line with that of recently reported lead-free piezoelectric MME generators. However, it slightly falls short when compared to MME generators incorporating Pb­(Mg 1/3 Nb 2/3 )­O 3 –PbZrO 3 –PbTiO 3 (PMN–PZ–PT) piezoelectric single-crystal macro fiber (SCMF) composites as reported in the literature …”

“…However, it slightly falls short when compared to MME generators incorporating Pb(Mg 1/3 Nb 2/3 )O 3 −PbZrO 3 − PbTiO 3 (PMN−PZ−PT) piezoelectric single-crystal macro fiber (SCMF) composites as reported in the literature. 4 Due to the limited output power of various energy harvesting systems, charging capacitors pose a challenge due to heightened current loss during the charging process, primarily caused by leakage current. Nonetheless, our optimized CBE-based MME structure with a Metglas layer effectively addressed this issue and successfully charged different capacitors.…”

“…3 From a multitude of energy sources including solar, wind, vibrational, electromagnetic radiation, and thermal, our focus was particularly on capturing the prevalent stray alternating current (AC) magnetic noise fields found in various environments such as buildings, infrastructures, factories, and electronic devices infrastructure. 4 These fields comprise both periodic magnetic fields with a frequency of 50/60 Hz generated by current-carrying cables and nonperiodic magnetic fields originating from vehicles and geomagnetism. 5 The periodic magnetic energy can be effectively harvested through a leading technology utilizing the magneto-mechano-electric (MME) conversion mechanism.…”

Self‐Powered Smart Proximity‐Detection System Based on a Hybrid Magneto‐Mechano‐Electric Generator

“…In a previous study, we showed that a PEH with a wide and short cantilever is more effective at generating a high output power at the resonance frequency (i.e., 60 Hz) of the first bending mode than a typical narrow and long cantilever. [27] To adopt a wide and short structure, we simulated the stress distributions of the SFC active layer with three different dimensions: 26 mm  18 mm, 28 mm  14 mm, and 30 mm  10 mm using COMSOL Multiphysics (Figure S1, Supporting Information). The maximum normalized stress was obtained for the 30 mm  10 mm distribution and was thus used as the piezoelectric layer in the MME generator.…”

“…MME generators. [22,27] Further, to ultimately realize the hyperconnected society, the development of smart devices/systems to facilitate not only passive environmental sensing but also informed preemptive action is essential. However, due to significant power consumption, implementing self-powered smart systems powered by MME generators is challenging and has not been reported so far.…”