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Analysis and measurement of damping characteristics of linear generator

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Adachi, Takahitoa; * | Takahara, Kenjib

Affiliations: [a] Department of Mechanical and Systems, Houkoku Gakuen High School, Kitakyusyu, Fukuoka, Japan | [b] Department of Electrical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, Fukuoka, Japan

Correspondence: [*] Corresponding author: Takahito Adachi, Department of Mechanical and Systems, Houkoku Gakuen High School, Yanagi-machi 4-5-1, Moji-ku, Kitakyusyu, Fukuoka 800-0025, Japan. Tel.: +81 093 371 3037; Fax: +81 093 371 3032; E-mail:ad16102@bene.fit.ac.jp

Keywords: Linear generator, PWM signal, viscous damping coefficient, semi-active suspension

DOI: 10.3233/JAE-162166

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1503-1510, 2016

Published: 29 December 2016
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Abstract

The purpose of this study is to analyse and to measure damping characteristics of a linear generator. The linear generator can convert any mechanical vibration to electric power. The damping characteristics of the linear generator change due to the changes of the connected resistance. Therefore, a linear generator can be used as a controllable damper. The viscous damping coefficients were calculated by a finite element method. The prototype linear generator was produced based on the simulation and its damping characteristics were measured. It was confirmed that the viscous damping coefficient was controlled by PWM signal. Furthermore, the charging characteristics were measured when it mover was driven by constant vibration of amplitude 30 [mm] and frequency 3 [Hz]. It was conceivable that the proposed linear generator can be used as a generator or a controllable damper as necessary.

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