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Conception d'alimentations de puissance d'actionneurs piézo-électriques, avec et sans contact électrique, pour la génération des vibrations mécaniques

Abstract : The works presented in this thesis deal with the power supply for piezoelectric actuators that will be placed on the rotating part of a drilling system. These actuators have a capacitive behavior and are usually supplied by linear systems. In this case, the design and the sizing of different switching amplifiers that provide, in a fixed frame, a sinusoidal power signal with modular frequency in the best possible conditions (efficiency and THD) have been made. Then, a contactless power system for piezoelectric actuators placed in a rotating frame was analyzed. This was possible thanks to the use of induction systems through a rotating transformer with an air gap. Three types of contactless systems were studied. The first one works at modular low frequencies [50-500 Hz] and the other two use resonant strategies in order to reduce transformer's size. For this, both magnetic and electrical modeling was performed in the three cases. A full-bridge inverter prototype that can deliver up to 680 VAR and a low frequency contactless energy transfer system of 1.75 kVAR that supplies the piezoelectric actuator at rotating frame have been made. Experimental results showed satisfactory results and proved the system feasibility.
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https://theses.hal.science/tel-00875503
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Submitted on : Tuesday, October 22, 2013 - 11:16:49 AM
Last modification on : Friday, March 25, 2022 - 9:42:20 AM
Long-term archiving on: : Thursday, January 23, 2014 - 4:23:37 AM

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  • HAL Id : tel-00875503, version 1

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Ekaitz Goenaga. Conception d'alimentations de puissance d'actionneurs piézo-électriques, avec et sans contact électrique, pour la génération des vibrations mécaniques. Sciences de l'ingénieur [physics]. Université de Grenoble, 2013. Français. ⟨NNT : ⟩. ⟨tel-00875503⟩

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