Adaptive piezoelectric energy harvesting circuit for wireless remote power supply

Autor:	George A. Lesieutre, Heath Hofmann, A.C. Bhatt, Geffrey Ottman
Rok vydání:	2002
Předmět:	Battery (electricity) Engineering business.industry Electrical engineering Power factor law.invention Capacitor law Boost converter Electronic engineering Maximum power transfer theorem Output impedance Electric power Electrical and Electronic Engineering business Energy harvesting
Zdroj:	IEEE Transactions on Power Electronics. 17:669-676
ISSN:	1941-0107 0885-8993
DOI:	10.1109/tpel.2002.802194
Popis:	This paper describes an approach to harvesting electrical energy from a mechanically excited piezoelectric element. A vibrating piezoelectric device differs from a typical electrical power source in that it has a capacitive rather than inductive source impedance, and may be driven by mechanical vibrations of varying amplitude. An analytical expression for the optimal power flow from a rectified piezoelectric device is derived, and an "energy harvesting" circuit is proposed which can achieve this optimal power flow. The harvesting circuit consists of an AC-DC rectifier with an output capacitor, an electrochemical battery, and a switch-mode DC-DC converter that controls the energy flow into the battery. An adaptive control technique for the DC-DC converter is used to continuously implement the optimal power transfer theory and maximize the power stored by the battery. Experimental results reveal that use of the adaptive DC-DC converter increases power transfer by over 400% as compared to when the DC-DC converter is not used.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29685dd013fb13a77d087a096b5f4d11 https://doi.org/10.1109/tpel.2002.802194 Zobrazit plný text záznamu