scholarly journals Electromagnetic Linear Vibration Energy Harvester Using Sliding Permanent Magnet Array and Ferrofluid as a Lubricant

Micromachines ◽  
2017 ◽  
Vol 8 (10) ◽  
pp. 288 ◽  
Author(s):  
Song Hee Chae ◽  
Suna Ju ◽  
Yunhee Choi ◽  
Ye-Eun Chi ◽  
Chang-Hyeon Ji
Keyword(s):  
Permanent Magnet ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Linear Vibration ◽  
Vibration Energy Harvester

scholarly journals Inducing bistability with local electret technology in a microcantilever based non-linear vibration energy harvester

2013 ◽  
Vol 102 (15) ◽  
pp. 153901 ◽  
Author(s):  
M. López-Suárez ◽  
J. Agustí ◽  
F. Torres ◽  
R. Rurali ◽  
G. Abadal
Keyword(s):  
Energy Harvester ◽  
Vibration Energy ◽  
Linear Vibration ◽  
Vibration Energy Harvester ◽  
Non Linear

scholarly journals A two degree-of-freedom linear vibration energy harvester for tram applications

2020 ◽  
Vol 140 ◽  
pp. 106657
Author(s):  
M. Perez ◽  
S. Chesné ◽  
C. Jean-Mistral ◽  
K. Billon ◽  
R. Augez ◽  
...  
Keyword(s):  
Energy Harvester ◽  
Degree Of Freedom ◽  
Vibration Energy ◽  
Linear Vibration ◽  
Vibration Energy Harvester ◽  
Two Degree Of Freedom

Piezoelectric energy reclamation based on frequency up-conversion technique for digital actuator autonomous additional functions

2017 ◽  
Vol 28 (12) ◽  
pp. 1682-1696 ◽  
Author(s):  
Linjuan Yan ◽  
Adrien Badel ◽  
Fabien Formosa ◽  
Laurent Petit
Keyword(s):  
Permanent Magnet ◽  
Cantilever Beam ◽  
Energy Harvester ◽  
Mechanical Energy ◽  
Magnetic Interaction ◽  
Interaction Force ◽  
Vibration Energy ◽  
Optimized Design ◽  
Vibration Energy Harvester ◽  
Piezoelectric Energy

A piezoelectric vibration energy harvester aiming at collecting energy from the operation of an electromagnetic digital actuator is presented. It is based on the frequency up-conversion and can simultaneously obtain the information of discrete position location. The objective is an improved reliability of such digital actuators ensuring sample controls of the actuator positions. The considered electromagnetic digital actuator is capable of achieving two-dimensional in-plane movements by switching a mobile permanent magnet among four discrete positions. The demonstration of a first step toward integrated additional autonomous functions scavenging a part of the mechanical energy of the mobile permanent magnet is achieved. The vibration energy harvester consists of a piezoelectric cantilever beam magnetically attached to the mobile permanent magnet. The limited magnetic interaction force allows a frequency up-conversion strategy to be set. The frequency up-conversion technique that is used here consists of a “low frequency” excitation that drives a much higher natural frequency oscillator. Indeed, once the energy harvester separates from the mobile permanent magnet, a free oscillation occurs and the induced mechanical energy is harvested. This design concept is numerically analyzed and experimentally validated. Harvested energy of 4.7 µJ is obtained from preliminary experiments using a simple out-of-plane cantilever beam with 9 N/m stiffness and 16 mN magnetic attraction between the vibration energy harvester and the mobile permanent magnet when they contact each other. This energy is in accordance with the requirements for wireless communication of simple information. Finally, an L-shaped cantilever beam optimized design is proposed for future in-plane integration.

Simply supported FPEDs connected by springs for broadband energy harvesting

2020 ◽  
Vol 64 (1-4) ◽  
pp. 201-210
Author(s):  
Yoshikazu Tanaka ◽  
Satoru Odake ◽  
Jun Miyake ◽  
Hidemi Mutsuda ◽  
Atanas A. Popov ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Evaluation Method ◽  
Energy Harvester ◽  
Vibrational Energy ◽  
Functional Materials ◽  
Vibration Energy ◽  
Theoretical Evaluation ◽  
Vibration Energy Harvester ◽  
Polyvinylidene Difluoride ◽  
Simply Supported

Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency band for ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

Hybrid Vibration Energy Harvester based on Stochastic Resonance

2018 ◽  
Vol 138 (5) ◽  
pp. 185-190
Author(s):  
Meng Su ◽  
Dai Kobayashi ◽  
Nobuyuki Takama ◽  
Beomjoon Kim
Keyword(s):  
Stochastic Resonance ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Vibration Energy Harvester
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