Modeling and Experimental Investigation of a Periodically Excited Hybrid Energy-Harvesting Generator

authored by

Viktor Hofmann, Gleb Kleyman, Jens Twiefel

Abstract

In this article the modeling of a broadband energy harvester utilizing piezoelectric and electromagnetic effects for rotational applications is presented. The hybrid energy harvester consists of a one-side-clamped piezoelectric bimorph with a solenoid on the free end and is excited periodically but non-harmonically by magnets that are fixed on a rotating object. To estimate and describe the performance of the energy harvester concept a linear semi-analytical model for the bimorph and the solenoid is developed and then enhanced for non-harmonic system oscillations by decomposing them into their harmonic components. A comparison between the calculated and measurement signals of a prototype device shows great conformity. According to model-based and experimental analysis, the hybrid system has good broadband behavior regarding electric power output. That aspect makes the device a perfect energy-harvesting system for application with highly fluctuating revolution speeds like miniature wind turbines.

Organisation(s)

Institute of Dynamics and Vibration Research

Type

Article

Journal

Energy Harvesting and Systems - Materials, Mechanisms, Circuits and Storage (Print)

Volume

2

Pages

213-226

No. of pages

14

ISSN

2329-8774

Publication date

01.07.2015

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Electrical and Electronic Engineering, Electrochemistry

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1515/ehs-2014-0043 (Access: Closed)