Abstract
Abstract An electrodynamic energy harvester is proposed for scavenging the electromagnetic energy in the vicinity of a power transmission line. To improve the efficiency and to maximize the distortion power factor of the energy harvester, the permanent magnet in the energy harvester is especially designed by the finite element method to optimize the topology and subsequently fabricated by additive manufacturing. An isotropic polymer-bonded NdFeB material is used for the fused-deposition modeling 3D printing process. Tensile tests of the printed magnetic parts show proper mechanical properties for harsh environments. Compared to a non-optimized magnet, the distortion power factor can be increased by 55%. The power and power density under the resonance condition of the fabricated harvester can reach 93 mW and 2.6 mW/cm3, respectively. The advantages of such an optimized energy harvester include being a fast and affordable manufacturing technique, an enhanced distortion power factor, and high output power. The properties of the energy harvester show that it has great potential for many self-powered applications such as wireless sensor networks and Internet of things.
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