Resonant electromagnetic vibration harvesters: Determination of the equivalent electric circuit parameters and simplified closed-form analysis for the identification of the optimal diode bridge rectifier DC load. (January 2017)

• Record Type: Journal Article
• Authors: Balato, Marco; Costanzo, Luigi; Vitelli, Massimo
• Is Part Of: International journal of electrical power & energy systems. Volume 84(2017)
• Page Start: 111
• Page End: 123
• Publication Date: 2017-01
• Subjects: Electromagnetic vibration energy harvesters -- Equivalent electric circuit -- Diode bridge rectifiers -- Parameters identification -- Optimal load -- Closed-form analysis; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2016.05.004
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: Energy harvesting: limit drawbacks associated to the use of batteries. Identification of parameters of the equivalent circuit of vibration harvesters. Parameters extraction from information provided by manufacturers of harvesters. Simplified analytical technique for analyzing harvesters with a rectifier load. Closed-form identification of the optimal DC load. Abstract: In this paper, the guidelines leading to the identification of the values of the parameters of the equivalent electric circuit of vibration electromagnetic harvesters are identified and discussed. A simplified closed form analysis of the non-linear system composed by a vibration electromagnetic harvester which supplies a DC load by means of a diode bridge rectifier is also presented. Such an analysis clearly puts in evidence that the maximum power which can be extracted by a given vibration harvester (when it supplies the optimal load impedance) is higher than the maximum power which can be extracted by such an harvester when it is cascaded with a diode bridge rectifier which supplies the optimal DC load. The term "optimal load" identifies in both cases the load in correspondence of which the electric power which is extracted from vibrations attains its maximum value.