Circuit and method for frequency tuning of a vibrational energy harvester
US11239777B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Mar 18, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/181
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a method of tuning an electric charge extraction circuit of a vibrational energy harvester having a mechanical resonator, the method comprising varying, during a first phase, first and second parameters (ψ1,ψ2) of the electric charge extraction circuit based on detected harvested power (PHARVEST), each of the first and second parameters (ψ1,ψ2) influencing the amount of damping of the mechanical resonator and at least the first parameter (ψ1) influencing the resonance frequency of the mechanical resonator, wherein the first and second parameters (ψ1,ψ2) are varied during the first phase such that the amount of damping remains constant or varies by less than a first significant amount and the resonance frequency reaches a final level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.