Micro Electromagnetic Energy Harvesters for Low-frequency and Large-amplitude Vibration

This thesis aims to develop the design of micro Electromagnetic Energy Harvesters (EMEHs) for ultra-low frequency nonlinear vibration. The primary components addressed in this research work include a non-resonant EMEH, a levitated EMEH, and a torsional EMEH.

A new non-resonant EMEH, based on free/impact motion with a simplified configuration, is proposed to enhance the working bandwidth. The novel resonant EMEH, derived from the cogging force, can perform levitated motion and maintain a compact structure without supplementary elements simultaneously. To achieve higher output power, a new torsional EMEH is proposed, which is capable of converting slow linear movement into high-frequency torsional vibration.