MEMS inertial power generators for biomedical applications

Published versio

Modelling for optimisation of self-powered wireless sensor nodes

Accepted versio

Analysis of optimised micro-generator architectures for self-powered ubiquitous computers

Accepted versio

Analysis and optimisation of MEMS electrostatic on-chip power supply for self-powering of slow-moving sensors

Accepted versio

Optimization of inertial micropower generators for human walking motion

Published versio

MEMS electrostatic micropower generator for low frequency operation

Accepted versio

Multiple solutions and corresponding power output of a nonlinear bistable piezoelectric energy harvester

We examine multiple responses of a vibrational energy harvester composed of a vertical beam and a tip mass. The beam is excited horizontally by a harmonic inertial force while mechanical vibrational energy is converted to electrical power through a piezoelectric patch. The mechanical resonator can be described by single or double well potentials depending on the gravity force from the tip mass. By changing the tip mass we examine the appearance of various solutions and their basins of attraction. Identification of particular solutions of the energy harvester is important as each solution may provide a different level of power output

Multilayer piezoelectric energy harvesting using single supply pre-biasing for maximum power generation

This paper studies the method of increasing output power of multilayer piezoelectric energy harvesters using Single Supply Pre-biasing (SSPB). In SSPB, it is important that the pre-biasing voltage be applied at the right moment. Multilayer piezoelectric energy harvesters are well suited SSPB as there is no phase lag between piezoelectric charge displacement on each layer and one layer can therefore be used for switch timing control. Compared to previously reported SSPB circuits, the power consumption of the circuit has been significantly reduced. Experimentally, the output power of a bimorph single-layer energy harvester using SSPB has been increased by a factor of three compared to that using a bridge rectifier. Furthermore, the possibility of implementing SSPB in bimorph double-layer energy harvesters has also been investigated