The Design and Experiment of a Spring-Coupling Electromagnetic Galloping Energy Harvester

Xiong, Lei; Gao, Shiqiao; Jin, Lei; Guo, Shengkai; Sun, Yaoqiang; Liu, Feng

doi:10.3390/mi14050968

Cited by 3 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The smaller the electromechanical coupling coefficient g e is, the smaller the electromagnetic damping force f e is, which is advantageous for the initiation of galloping. When the radii r of the magnet and the coil are equal, the electromechanical coupling coefficient g e is given by [34].…”

Section: Discussionmentioning

confidence: 99%

Study on the Influence of Coil Arrangement on the Output Characteristics of Electromagnetic Galloping Energy Harvester

Xiong,

Gao,

Jin

et al. 2023

Micromachines

Self Cite

View full text Add to dashboard Cite

The arrangement of the induction coil influences the electromagnetic damping force and output characteristics of electromagnetic energy harvesters. Based on the aforementioned information, this paper presents a proposal for a multiple off-center coil electromagnetic galloping energy harvester (MEGEH). This study establishes both a theoretical model and a physical model to research the influence of the position and quantity of the induction coils on the output characteristics of an energy harvester. Additionally, it conducts wind tunnel tests and analyzes the obtained results. With the increase in the number of induction coils, there is a significant improvement in the duty cycle and output power of the MEGEH, resulting in an amplified energy conversion efficiency. At a wind speed of 9 m/s, the duty ratios of a single set of coils (SC), two sets of coils (TC), and multiple sets of coils (MC) are 30%, 51%, and 100%, respectively. The total output powers are 0.4 mW, 0.62 mW, and 0.72 mW. However, the rate of output growth has decreased from 55% to 16%. The position of the coils affects the initial electromagnetic damping of the energy harvester. Changing the position can reduce the initial electromagnetic damping, thereby decreasing the critical wind speed. The critical wind speed of the MEGEH decreases as the induction coil is positioned further away from the vibration center. When the distance is sufficiently large, the electromagnetic damping force becomes negligible. When the induction coil is positioned centrally, the MEGEH demonstrates its maximum critical wind speed, which has been measured at 4.01 m/s. When the initial distance between the induction coil and the vibrating component is increased to 10 mm, the critical wind speed reaches its minimum value of 2.23 m/s. Therefore, it is necessary to optimize the arrangement of the coils. The coils of the MEGEH should be arranged with the MC and a 10 mm offset from the center.

show abstract

Section: Discussionmentioning

confidence: 99%

Study on the Influence of Coil Arrangement on the Output Characteristics of Electromagnetic Galloping Energy Harvester

Xiong,

Gao,

Jin

et al. 2023

Micromachines

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to (23), when µ r = 200, s = 3 × 10 −8 m 2 and ρ = 5 × 10 −8 Ωm, the ratio γ′ i γ′ r approximately becomes 3.6 × 10 −5 ω. Therefore, when the frequency is kept below 1 kHz, γ′ i can be disregarded, and Equation ( 22) may be rewritten in a simplified form as…”

Section: Electromagnetic Energy Harvested During Spring Motionmentioning

confidence: 99%

“…Therefore, numerical procedures such as the Runge-Kutta method should be applied to the different particular motion conditions. In Figure 2b, the poles of the magnet are in front of a circular coil surface in such a way that the flux through the coil surface is maximum, i.e., 𝑑𝑑(0) in ( 10) is maximum [23]. Appendix A presents the calculations for the case of rectangular poles structure.…”

Section: Taking Into Account the Fourier Transform Ofmentioning

confidence: 99%

Mathematical Analysis of the Electromotive Induced Force in a Magnetically Damped Suspension

Aberturas,

Aguilera,

Olazagoitia

et al. 2024

Mathematics

View full text Add to dashboard Cite

This study explores the advanced mathematical modeling of electromagnetic energy harvesting in vehicle suspension systems, addressing the pressing need for sustainable transportation and improved energy efficiency. We focus on the complex challenge posed by the non-linear behavior of magnetic flux in relation to displacement, a critical aspect often overlooked in conventional approaches. Utilizing Taylor expansion and Fourier analysis, we dissect the intricate relationship between oscillation and electromagnetic damping, crucial for optimizing energy recovery. Our rigorous mathematical methodology enables the precise calculation of the average power per cycle and unit mass, providing a robust metric for evaluating the effectiveness of energy harvesting. Further, the study extends to the practical application in a combined system of passive and electromagnetic suspension, demonstrating the real-world viability of our theoretical findings. This research not only offers a comprehensive solution for enhancing vehicle efficiency through advanced suspension systems but also sets a precedent for the integration of complex mathematical techniques in solving real-world engineering challenges, contributing significantly to the future of energy-efficient automotive technologies. The cases reviewed in this article and listed as references are those commonly found in the literature.

show abstract

“…Compared with the static base, the rotating base structure can reduce the impact of natural wind instability and obtain higher output power. Xiong et al [21] proposed a springcoupled electromagnetic energy harvester. The coupled spring can increase output power by converting the vibration energy generated by bluff body vibration into the elastic energy of the spring.…”

Section: Introductionmentioning

confidence: 99%

Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

Zheng,

Li,

Zhang

2024

Energies

View full text Add to dashboard Cite

Galloping-based piezoelectric energy harvesting systems are being used to supply renewable electricity for low-power wireless sensor network nodes. In this paper, a W-shaped bluff body is proposed as the core component of a piezoelectric wind energy harvester. Experiments and simulations have shown that the W-shaped bluff body can improve harvesting efficiency at low wind speeds. For the W-shaped structure, the finite element simulation results indicate that the structure can help improve the aerodynamic performance to obtain high aerodynamic force. The experimental results demonstrate that compared with the traditional bluff bodies, the piezoelectric wind energy harvester with the W-shaped bluff body (WEHW) can generate higher output voltages and has a lower cut-in speed. When the length L is 30 mm and the rear groove angle β is 30°, the W-shaped structure can induce the best harvesting performance. When an external load resistance of 820 KΩ is connected and the wind speed is 5 m/s, the WEHW generates an average output power of 0.28 mW.

show abstract

The Design and Experiment of a Spring-Coupling Electromagnetic Galloping Energy Harvester

Cited by 3 publications

References 36 publications

Study on the Influence of Coil Arrangement on the Output Characteristics of Electromagnetic Galloping Energy Harvester

Study on the Influence of Coil Arrangement on the Output Characteristics of Electromagnetic Galloping Energy Harvester

Mathematical Analysis of the Electromotive Induced Force in a Magnetically Damped Suspension

Low-Wind-Speed Galloping Wind Energy Harvester Based on a W-Shaped Bluff Body

Contact Info

Product

Resources

About