Research on the Performance Laws of the Piezoelectric Beam and Magnetic Coupling Module of the Magnetic-Coupled Double-Wing Negative Stiffness Energy Harvester
Jie Yang, Yingchun Chen
TL;DR
This paper introduces a new energy harvester for floating slabs in urban rail transit that uses piezoelectric beams and magnetic coupling to convert vibrations into usable energy.
Contribution
The novel magnetic-coupled double-wing negative stiffness energy harvester is proposed, integrating piezoelectric and magnetic coupling mechanisms for vibration energy harvesting.
Findings
The thickness of the piezoelectric beam significantly affects the characteristic frequency.
The output power of the piezoelectric beam is exponentially related to the load.
The peak value of the magnetic-coupled negative stiffness decreases as the magnetic gap increases.
Abstract
With the rapid development of urban rail transit, the floating slab vibration isolation system has become widely used in the field due to its effective vibration reduction and isolation capabilities. Traditional floating slab vibration-isolation systems mainly focus on blocking vibration transmission, neglecting energy harvesting. This paper proposes a magnetic-coupled double-wing negative stiffness energy harvester for floating slabs. A single-wing piezoelectric beam model and a finite element model of the magnetic-coupled module are established. The modal and output characteristics of the single-wing piezoelectric beam are analyzed. Furthermore, the force characteristics of the magnetically coupled negative stiffness module are analyzed. The results show that the contribution of its width to the modal frequency gradually decreases with an increase in the length of the single-wing…
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Taxonomy
TopicsInnovative Energy Harvesting Technologies · Vibration Control and Rheological Fluids · Acoustic Wave Phenomena Research