The efficiency of mobile electrical devices increased over the last years. Self‐supply by harvesting ambient energy became a possibility of reducing operational costs by ruling out the need of battery replacement.
Many energy harvesting devices employ cantilever configurations with base excitation to increase the effective displacement. The proposed design extends this design with an electromagnetic harvesting device (EMH) placed at its tip. It features an alternating stack of magnets with opposing poles and discs of highly permeable material. The composite cylinder is encircled by coils. This EMH design has successfully been employed for ocean wave harvesting and vehicle suspension systems. Its efficiency with respect to mass and energy output is compared to a previously published design using a single magnet placed at the tip moving within a coil.
There exists proof that combining readily available technologies into a so‐called coupled or hybrid design can increase the efficiency in comparison to respective stand‐alone designs. Once the model for the proposed design is derived and evaluated, it is extended by a cantilevered excitation. Piezoelectric layers for hybrid harvesting may be included in future research.
