Physics – Classical Physics
Scientific paper
2011-11-10
Smart Materials and Structures 19 (2010) 075015
Physics
Classical Physics
This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP
Scientific paper
10.1088/0964-1726/19/7/075015
Thanks to miniaturisation, it is today possible to imagine self-powered systems that use vibrations to produce their own electrical energy. Many energy-harvesting systems already exist. Some of them are based on the use of electrets: electrically charged dielectrics that can keep charges for years. This paper presents an optimisation of an existing system and proves that electret-based electrostatic energy scavengers can be excellent solutions to power microsystems even with low-level ambient vibrations. Thereby, it is possible to harvest up to 200\muW with vibrations lower than 1G of acceleration (typically 50\mumpp at 50Hz) using thin SiO2 electrets with an active surface of 1 cm^{2} and a mobile mass of 1g. This paper optimises such a system (geometric, electrostatic and mechanical parameters), using FEM (Finite Element Method) software (Comsol Multiphysics) and Matlab to compute the parameters and proves the importance of such an optimisation to build efficient systems. Finally, it shows that the use of electrets with high surface potential is not always the best way to maximise output power.
Boisseau S.
Despesse G.
Sylvestre A.
No associations
LandOfFree
Optimization of an electret-based energy harvester does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optimization of an electret-based energy harvester, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimization of an electret-based energy harvester will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-728035