Design and implementation of an energy harvester with a fluid core

© 2019 IEEE. In the present work, a new type granular core has been studied and implemented to a mechanically excited electromagnetic harvester. The system mainly consists of a linear fluid core and a surrounding winding. The system entirely depends on the vibration of the fluid core indicating a highly fluid dynamical feature, whereas the winding component of the harvester stays at rest. The tests have proven that the generated energy depends on the vibration frequency and mass of the ferromagnetic granules. An rms power and voltage values are found as P=1 mW and U= 40 mV at m= 28.7 g ferromagnetic granules and 30-62 Hz frequencies, respectively

Design and implementation of an energy harvester with a fluid core

© 2019 IEEE. In the present work, a new type granular core has been studied and implemented to a mechanically excited electromagnetic harvester. The system mainly consists of a linear fluid core and a surrounding winding. The system entirely depends on the vibration of the fluid core indicating a highly fluid dynamical feature, whereas the winding component of the harvester stays at rest. The tests have proven that the generated energy depends on the vibration frequency and mass of the ferromagnetic granules. An rms power and voltage values are found as P=1 mW and U= 40 mV at m= 28.7 g ferromagnetic granules and 30-62 Hz frequencies, respectively

Manipulation of Exchange Coupling in Py/Co/Cr Multi layer Thin Films

The main issue addressed in present study is exchange coupling modification between ferromagnetic layers through non-magnetic spacer layers using extra ultra-thin ferromagnetic layers (Co). In order to achieve this goal, we prepared Cr(50 angstrom) / Py(20 angstrom) / Co(5 angstrom) / Cr(7, 10, 13 angstrom) / Co(5 angstrom) / Py (30 angstrom) / Cr(50 angstrom) / Si using magnetron sputtering at UM' conditions and characterized by Ferromagnetic Resonance (FMR) technique. As the present study results were compared to our previous study on (Py/Cr), the exchange coupling energy was increased ten times with the cobalt thin laye