Micro and nano-electromechanical devices applied to energy harvesting: Electromagnetic and hybrid electrostatic-electromagnetic devices
Instituto Venezolano de Investigaciones CientÃficas, Venezuela
: J Electr Eng Electron Technol
The conversion of energy from the sun, thermal gradients and mechanical vibrations, among others to electrical energy is called Energy Harvesting. In particular, the mechanical vibrations present in the environment have the advantage that is more ubiquitous in comparison with the solar energy and thermal gradients. Also, given the reduction of the power consumption of many devices for example in the very important area of wireless sensors networks, investigation in alternative sources of energy powered by mechanical vibrations has taken relevance. In this talk, I will describe a model for two electromechanical devices: An electromagnetic and a hybrid electrostatic-electromagnetic device. I will include in this model, a complete description of the mechanical vibrations based on measurements of the power spectrum of different sources of mechanical noise. We will discuss the advantages and drawbacks of these two devices compared between them and with piezoelectric and pure electrostatic transductors. Finally I will introduce a feedback protocol that allows controlling the vibrations on the device described in order to enhance a range of frequencies.