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Récolteuses d’énergie cinétique électrostatique (e-REC) à basse fréquence pour applications de communication RFID et électronique portable

Abstract : A growing number of portable and wearable electronics results in an increasing demand of sustainable and localized power supply module of small size and weight, and offering high output power. As a promising choice for the power supply, Kinetic energy harvesters (KEHs), transforming the ambient vibrations or motions into electrical energy, are studied intensively in recent yeas. The performance of the miniature KEHs available in literature are generaly confined by their sized. The ambient vibrations are usually abundant in low frequency, which is also a major factor restricting the output power of the KEH. In order to enhance the power output, we should improve the energy conversion efficiency, which is related to the transduction principle. This work presents the improvement of the output power of low frequency electrostatic KEHs through impact-coupled mechanical frequency up conversion mechanism, and proposes a predictive numerical model of the prototype which considers the squeeze film air damping effect and the impacts in the prototype. A prototype is proposed with improved geometry of capacitive module reducing the air damping force. Alternative approaches to adjust the KEHs to varied applications are proposed, including a fully flexible KEH designed for wearable electronics, and a 2-D low frequency KEH that is sensible to vibrations along two orthogonal directions. In addition, a fully energy-autonomous RFID tag system implementing the low frequency KEH as the power supply module and a semi-passive RFID communication module is presented
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Submitted on : Tuesday, November 27, 2018 - 11:25:34 AM
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  • HAL Id : tel-01936057, version 1

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Yingxian Lu. Récolteuses d’énergie cinétique électrostatique (e-REC) à basse fréquence pour applications de communication RFID et électronique portable. Traitement du signal et de l'image [eess.SP]. Université Paris-Est, 2018. Français. ⟨NNT : 2018PESC1077⟩. ⟨tel-01936057⟩

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