Vibrational energy harvesters with reduced wear
US11929692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2019 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Jun 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/306
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The proposed vibrational energy harvester comprises a frame (118), a mass (114) coupled to first and second primary flexures (110, 112) which are configured to flex and allow the mass to move in a first direction (130), a plurality of secondary flexures (120, 122) which are configured to flex and allow the mass to move in a different second direction (132), and a transduction assembly configured to convert movement of the mass and flexures into electrical energy, preferably of electrodynamic or piezoelectric type. Each of the primary flexures is coupled to a secondary flexure at a position spaced from the mass. The resonant frequency of torsional vibration modes can thereby be raised to a frequency higher than the frequency band of ambient vibrations, which effectively prevents the energy harvester from vibrating in undesirable torsional modes that would result in wear between components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.