Analysis of the energy harvesting performance of a piezoelectric bender outside its resonance
TypeArticles dans des revues avec comité de lecture
When the frequency of the source of vibration of a piezolectric generator is significantly different from its eigenfrequency, the dielectric power losses become prominent and decrease the amount of power which is practically harvested. For off-resonance vibrating frequencies, the optimal operating conditions can be obtained with a Maximum Power Point Tracking method. This paper introduces complex phasors in the study of power conversion for piezoelectric generators. These complex phasors are used to describe three strategies which help simplify the tracking of the optimal generator output power for vibration frequencies which are away from resonance. Experimental results obtained on a prototype illustrate and confirm the approach with the phasor approaches illustrate and confirm the success of the proposed optimal power tracking strategies. Finally, we show that the efficiency results of each strategy depend on whether they are used inside or outside a frequency bandwidth around the eigenfrequency, and that the length of this bandwidth depends on the excitation amplitude.
Showing items related by title, author, creator and subject.
ENFERAD, Ehsan; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty; GIRAUD, Frédéric (2018)To date, Several focusing techniques have been proposed to realize localized stimulation on haptic interfaces: phased arrays of actuators with delayed excitation, or time reversal techniques which require a preliminary ...
GIRAUD-AUDINE, Christophe; GIRAUD, Frédéric; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2014)This paper presents the closed-loop control of exciters to produce a traveling wave in a finite beam. This control is based on a dynamical modeling of the system established in a rotating reference frame. This method allows ...
NADAL, Clément; GIRAUD-AUDINE, Christophe; GIRAUD, Frédéric; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2014)This paper deals with an unidimensional analytical modelling of the vibratory behaviour of a rectangular beam excited by several piezoelectric ceramics glued on its lower face. The establishment of the equations of motion ...
Modelling and control of a travelling wave in a finite beam, using multi-modal approach and vector control method GHENNA, Sofiane; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2015)This paper presents a new method to produce and control the vibration amplitude and direction of a travelling wave in a finite beam, using multi-modal approach. A closed loop control of the transducer vibration is applied ...
GHENNA, Sofiane; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty (IEEE, 2015)The control of the vibration amplitude, and the resonance frequency tracking for ultrasonic transducer have been established. However, some applications require to control the vibration amplitude and its relative phase at ...