A low power and efficient microcontroller-based extraction circuit for HVAC applications

Pierre Gasnier (1) , Maxime Gallardo (2) , Rammouz Ramzy (1) , Nicolas Garraud (1) , Louis Araouzos (3) , Alexandra Garraud (3) , J-P Gros (1)

1 DSYS - Département Systèmes
2 SERMA INGENIERIE
3 Enerbee Technology F2A Group, F-38000 Grenoble, France

In this paper, we report a low power implementation of a Power Management Circuit (PMC) performed by means of a microcontroller unit (MCU) surrounded by discrete components. In the context of HVAC applications with the aim of converting rotational movements into electrical energy, a non-linear extraction technique is implemented by controlling a Flyback converter at the maximum voltage of a magnetoelectric harvester. Compared with the Standard Energy Harvesting (SEH) interface, a power gain up to 1.75 was measured at a frequency of 47 Hz and a Flyback efficiency up to 80% for an output power of 0.5 mW. This architecture contributes to increase the versatility of PMCs addressing lowly-coupled piezoelectric harvesters (PEHs).

Domaines: Energie électrique

Pierre Gasnier, Maxime Gallardo, Rammouz Ramzy, Nicolas Garraud, Louis Araouzos, et al.. A low power and efficient microcontroller-based extraction circuit for HVAC applications. JNRSE 2023 - Journées Nationales sur la Récupération et le Stockage de l’Energie, Jun 2023, Paris, France. ⟨cea-04225959⟩