Article
Instruments & Instrumentation
Kun Zhang, Bo Zhang, Wei Feng, Zongyao Liu, Huipeng Shen, Baoguo Liu
Summary: This paper proposes an electromagnetic vibration energy harvester (EVEH) based on a diamagnetic levitation system for harvesting ultralow-frequency, broadband vibration energy. The harvester utilizes a diamagnetic levitation structure to reduce the operating frequency and mechanical impact to broaden the working bandwidth. Experimental results show that the harvester can efficiently operate in an ultralow-frequency, random, and large-amplitude-vibration environment, with a maximum peak-to-peak voltage of 370 mV over a wide frequency range of 3-16 Hz at 1 g acceleration, and an RMS output power of 26.7 mu W at the excitation frequency of 6 Hz.
SENSORS AND MATERIALS
(2023)
Article
Thermodynamics
Jun Yu, Decai Li, Shengbin Li, Ziyin Xiang, Zidong He, Jie Shang, Yuanzhao Wu, Yiwei Liu, Run-Wei Li
Summary: This paper proposes an electromagnetic VEH using magnetic fluid (MF) as lubricant and liquid spring, which replaces traditional mechanical or magnetic springs with a liquid spring with variable stiffness coefficient. Planar coils and helical coils are used together to harvest the vibration energy, thereby broadening response frequency, improving energy harvest efficiency, and reducing VEH volume and damping.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
Krzysztof Kecik, Marcin Kowalczuk
Summary: This paper investigates the possibility of converting vibrations to electricity and proposes a numerical and experimental study of a magnetic levitation harvester. The results indicate that the nonlinear electromechanical coupling model is more suitable for higher oscillations of the magnet, and recovered energy can be controlled by simple configuration of the magnet coil position.
Article
Materials Science, Multidisciplinary
Shoutai Li, Yifeng Wang, Mingjin Yang, Yuhua Sun, Fei Wu, Jun Dai, Ping Wang, Mingyuan Gao
Summary: A Magnetic Levitation Energy Harvester (MLEH) was designed and tested in this study, showing effectiveness in powering rail-side sensors. The device demonstrated a broadband response and had a wide range of output power in sweeping-frequency vibration tests.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2022)
Article
Instruments & Instrumentation
Jiwen Fang, Bo Fan, Chong Li, Mingming Lv
Summary: Low-frequency vibration is widespread in nature and vibration energy harvesting is considered a reliable and sustainable method for continuous power supply. Designing a bio-inspired mechanical structure to improve the efficiency of energy harvesting by mimicking the flapping wing motion of Diptera insects is a feasible approach.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Analytical
Osor Pertin, Koushik Guha, Olga Jaksic, Zoran Jaksic, Jacopo Iannacci
Summary: This paper proposes a monostable nonlinear Piezoelectric Energy Harvester (PEH), based on an unconventional exsect-tapered fixed-guided spring design. The effects of stretching-induced nonlinearity on the performance of the energy harvester were analyzed through physical-mathematical modeling and finite element simulations. The results show that the proposed nonlinear PEH exhibits significantly improved bandwidth and power enhancement compared to conventional and linearly tapered nonlinear PEHs.
Article
Engineering, Mechanical
Kaouthar Aouali, Najib Kacem, Noureddine Bouhaddi, Mohamed Haddar
Summary: This paper studies a generic model of a nonlinear quasiperiodic vibration energy harvester based on electromagnetic transduction. A validated 2-DOFs harvester is optimized to significantly improve harvested power and frequency bandwidth. The results show that using a 5-DOFs VEH with two perturbed DOFs oscillators can effectively increase harvested power and frequency bandwidth.
Article
Physics, Applied
Jingyun Zhang, Yufeng Su
Summary: This paper proposes an energy harvesting structure using diamagnetic levitation mechanism. The floating magnet rotor is driven to rotate by airflow with the joint action of magnetic forces and diamagnetic forces. The study investigates the influence of structural parameters on the performance of the harvester and finds that the output voltage increases with the square of flowrate.
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
(2022)
Article
Acoustics
Guo Yao, Yu Qiao
Summary: This paper investigates the use of a nonlinear energy sink and a giant magnetostrictive-piezoelectric energy harvester to suppress the nonlinear aeroelastic responses of an embedded plate and absorb mechanical energy from external subsonic airflow. The analytical model of the plate with the energy harvester is established and the natural frequencies are analyzed. The results show the vibration suppression effects of the proposed method and study the energy transfer mechanisms.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Energy & Fuels
Kankana Paul, Andreas Amann, Saibal Roy
Summary: This study introduces a high power density nonlinear wideband energy harvester using novel tapered spring architectures, providing a sustainable energy source for the Internet of Things applications.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Chemistry, Physical
Zhaoyu Li, Lihua Tang, Weiqing Yang, Renda Zhao, Kefu Liu, Brian Mace
Summary: The study investigates the transient response of an NES-based piezoelectric vibration energy harvesting system interfaced with an SCE interface, analyzing the nonlinear normal mode of this electromechanically coupled system. Results show that the electrical load in the SCE interface has minimal impact on the energy harvesting performance of the system.
Article
Thermodynamics
Yifeng Wang, Peigen Wang, Shoutai Li, Mingyuan Gao, Huajiang Ouyang, Qing He, Ping Wang
Summary: This paper proposed an electromagnetic vibration energy harvester using an innovative vibration-to-rotation conversion mechanism based on a magnet array, which has been experimentally verified to have good power output and is suitable for powering low-power electronics.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Mechanical
V. De Biagi, B. M. Chiaia, G. C. Marano
Summary: Linear energy harvesters have a narrow frequency bandwidth and efficient operation relies on the excitation frequency close to the fundamental frequency. Nonlinearity in electromechanical devices is proposed to extend the bandwidth. This study optimizes a Duffing-type nonlinear energy harvester to reduce its size while maintaining power output.
PROBABILISTIC ENGINEERING MECHANICS
(2023)
Article
Thermodynamics
Xiaobiao Shan, Guangdong Sui, Haigang Tian, Zhaowei Min, Ju Feng, Tao Xie
Summary: This paper designs an underwater magnetic nonlinear piezoelectric energy harvester (PEH) based on the principle of vortex-induced vibration (VIV), which significantly increases system performance by changing the equivalent stiffness through varying magnet position, especially at high flow rates.