Passive Self-tuning Energy Harvester for Rotational Motion
- Technology Benefits
- Significantly increases the bandwidth of harvesters for rotating systems, especially well suited for variable speed systems
- Technology Application
- Energy harvester for variable rotational speed systems, such as tire pressure-monitoring systems.
- Detailed Technology Description
- None
- *Abstract
-
Problem:Conventional resonant vibrational energy harvesters have fixed resonant frequencies and have limited applicability to time-dependent vibrational environments, such as automobile engines or wheels.Technology:This invention proposes an energy harvester for rotational motion that is self-tuned to resonate with the rotational frequency. As the rotation frequency changes, the resonant frequency of the energy harvester is adjusted by passively varying tension on a the vibrating beam. A prototype on a simulated rotating car wheel demonstrated significantly improved performance compared with untuned harvester performance.
- Country/Region
- USA
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