“Small-scale energy harvesting for self-powered devices – general considerations and circuit aspects”

Mickaël Lallart
Univ. Lyon, INSA-Lyon, LGEF, EA682
F-69621 VILLEURBANNE, France

This lecture aims at exposing key points in energy harvesting systems and devices with a particular focus on the design of a global electrical interface for energy harvesting. After a general overview of typical energy sources and associated conversion effects, along with good practices about their use, the specific case of proper electrical interface design will be devised. This will include the energy extraction enhancement through nonlinear process, load adaptation and voltage regulation. Specifies of several typical conversion effects (for instance piezoelectric or electromagnetic for vibrational systems and thermoelectric or pyroelectric for thermal devices) will also be pointed out and included in the proposed circuits. All along the lecture, participants will be proposed to implement themselves the proposed architectures in a simulation software (LTSpice, downloadable for free at https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html).