A Magnetoelectric Heterostructure Scavenging Mechanical Energy from Hand Shaking for Portable Electronic Devices

Energy harvesting from human hand shaking provide a promising solution for the power supply of the portable electronic devices. In this paper, a magnetoelectric (ME) heterostructure is developed to extract mechanical energy from hand shaking. The use of a Halbach array potentially enhances the induced equivalent magnetic field of the ME transducer. Experiments are carried out using the fabricated prototype. The accelerations and the induced voltages are measured. The output voltage varies with the hand shaking frequency. Under the shaking frequency of 2.9Hz, A RMS voltage of 10.56V can be generated. The results demonstrate the practicability of the proposed energy harvester under ultra-low frequency excitation.