A tunable broadband magnetoelectric and electromagnetic hybrid vibration energy harvester based on nanocrystalline soft magnetic film

In this paper, a tunable broadband electromagnetic (EM) and magnetoelectric (ME) hybrid vibration energy harvester (HVEH) employing a hybrid transducer and double cantilever to convert low-frequency vibration energy into electrical energy is presented. The electric output performances of the proposed HVEH have been investigated. Compared to single ME or EM vibration energy harvester (VEH), the experiment results show that the proposed HVEH can simultaneously obtain an enhanced output performance including higher power, voltage, current and wide bandwidth. It is found that the output power and resonance frequency of HVEH can be tuned by controlling the FeCuNbSiB layer thickness, turns number and cantilever length, respectively. When FeCuNbSiB layer thickness, cantilever length and turns number is 30 μm, 5 cm and 750, the optimum output power and effective bandwidth of HVEH achieve 36.8 mW and 5.6 Hz for an acceleration of 0.75 g at frequency of 32 Hz, respectively. Remarkably, the proposed HVEH has great potential for its application in wireless sensor networks.