Shaped coil-core design for inductive energy collectors

M. E. Kiziroglou, S.W. Wright, E. M. Yeatman
2019 2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)  
Coil design is important for maximizing power density in inductive energy harvesting as well as in inductive power transfer. In this work, we present a study of coil performance, based on simulated flux distributions corresponding to a real aircraft application case. The use of funnel-shaped soft magnetic cores boosts magnetic flux density by flux concentration and allows the use of a shorter winding perimeter. This reduces the transducer mass as well as the coil resistance (RCOIL), thereby
more » ... easing the power density. Analysis and simulation shows a fifty-fold power density increase from moderate funneling and another two-fold increase by coil size optimization. Results are compared with experimental measurements presented in [1] which demonstrate a 36 μW/g (106 μW/cm 3 ) power density from alternating environmental magnetic fields in the 10 μT / 300 Hz range.
doi:10.1109/powermems49317.2019.71805307777 fatcat:f74kp5ccgfei7el35bihva2g7y