US 12,149,188 B2
Device for recovering or damping the vibratory energy of a resonant mechanical element
Adrien Morel, Grenoble (FR); Adrien Badel, Lescheraines (FR); Franck Badets, Grenoble (FR); Nicolas Goux, Grenoble (FR); and Gaël Pillonnet, Grenoble (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR); and UNIVERSITE SAVOIE MONT BLANC, Chambery (FR)
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR); and UNIVERSITE SAVOIE MONT BLANC, Chambery (FR)
Filed on Jun. 21, 2021, as Appl. No. 17/304,393.
Claims priority of application No. 20 06491 (FR), filed on Jun. 22, 2020.
Prior Publication US 2021/0399657 A1, Dec. 23, 2021
Int. Cl. H02N 2/18 (2006.01); H02M 7/219 (2006.01)
CPC H02N 2/181 (2013.01) [H02M 7/219 (2013.01); H02N 2/188 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device for recovering or dampening vibratory energy from a mechanical resonator, comprising:
an electrical generator comprising at least one conversion element for converting mechanical vibration energy of the mechanical resonator into electrical charges mechanically coupled to the mechanical resonator and configured to output a conversion signal, corresponding either to a sinusoidal voltage obtained between first and second output electrodes of the at least one conversion element or to a sinusoidal current obtained on the first output electrode of the at least one conversion element, of frequency equal to a vibration frequency of the mechanical resonator, the electrical generator being configured to periodically transfer, on command of a signal to be received on a control input, at least part of the electrical charges from one to the other of the first and second output electrodes of the at least one conversion element;
a converter comprising an input electrically coupled to the first output electrode of the at least one conversion element and configured to provide at an output a square wave signal of frequency equal to the frequency of the conversion signal; and
a device for converting frequency variation into phase variation, comprising at least a first injection-locked oscillator, an injection input of which is electrically coupled to the output of the converter and configured such that its free oscillation frequency is substantially equal to a resonance frequency of the mechanical resonator, and configured to output on an output electrically coupled to the control input of the electrical generator, a periodic control signal of frequency equal to the frequency of the conversion signal and whose phase shift, relative to the conversion signal, is a function of a difference between the frequency of the conversion signal and the resonance frequency of the mechanical resonator.