Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 359, P. 114409 - 114409
Published: May 29, 2023
Language: Английский
Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 14
Published: Aug. 22, 2024
Aiming at the problems of high environmental vibration frequency, low output power and short life energy harvesters, a noncontact magnetically coupled piezo-electromagnetic rotary harvester is proposed in this paper. It consists base, top cover, rotating body, cantilever beam, permanent magnet, coil, hollow tube clamp. The novel hybrid can produce both piezoelectric electromagnetic same time, addition, it efficiently generate electricity ambient vibration. Moreover, material protected from direct collision by magnetic coupling excitation. In order to conduct comprehensive study on performance piezoelectric-electromagnetic harvester, we set up test platform carry out systematic verification, determine distance between magnet body number magnets body. results show that when four are uniformly pasted speed 775 r/min, 3.4 mW 2.69 mW, respectively, total 6.09 mW.
Language: Английский
Citations
5
Nano Energy, Journal Year: 2023, Volume and Issue: 117, P. 108929 - 108929
Published: Sept. 24, 2023
Language: Английский
Citations
12
Sustainable Energy Technologies and Assessments, Journal Year: 2024, Volume and Issue: 66, P. 103798 - 103798
Published: May 15, 2024
Language: Английский
Citations
3
Energy Reports, Journal Year: 2024, Volume and Issue: 12, P. 5194 - 5219
Published: Nov. 12, 2024
Language: Английский
Citations
3
Energy Reports, Journal Year: 2023, Volume and Issue: 9, P. 3553 - 3562
Published: Feb. 27, 2023
Many piezoelectric energy harvesters can harvest single direction vibration effectively. However, practical ambient may be multidirectional. To capture multidirectional vibration, this paper proposes a rope-driven harvester (RPEH). The RPEH consists of two cantilevers, which are coupled through non-extensible rope and proof mass. Dynamical responses harvesting performance the under vibrations is investigated in experiment. It observed that will cause motion mass, then mass drives cantilevers to vibrate rope. Compared linear cantilever, experimental results show operation bandwidth proposed improved by 140%, 40% 140% three directions (x-direction, y-direction or z-direction), respectively.
Language: Английский
Citations
7
Smart Materials and Structures, Journal Year: 2024, Volume and Issue: 33(2), P. 025032 - 025032
Published: Jan. 12, 2024
Abstract Conventional energy harvesters often require high ambient vibration frequencies and can only capture in a single direction. To address these issues, this paper designs magnetostrictive two-dimensional kinetic harvester placed under the floor capable of capturing both vertical horizontal directions. In order to achieve higher electrical power output at low-frequency input forces, two-stage force amplification mechanism is designed amplify walking pedestrians main parameters structure are analyzed optimized. On other hand, by constructing different forms bias magnetic field, influence field on deflection motion internal domain Terfenol-D systematically studied, best form that make material shows strongest magnetization characteristics determined. Next, prototype was built, an experimental system set up test analyze comprehensively. The results show produces 21.2 mW peak sinusoidal excitation operating frequency 4 Hz. Under random excitation, voltage 2.64 V 170 obtained. actual pedestrian tests, 17.62 obtained low-power devices. study’s provide preliminary evidence stably harvest from walking.
Language: Английский
Citations
2
Mechanical Systems and Signal Processing, Journal Year: 2024, Volume and Issue: 214, P. 111360 - 111360
Published: April 4, 2024
The development of self-powering systems has been recognized as critical such that innovative stand-alone emerging technologies can operate sustainably from scavenged ambient energy. Electromagnetic generators (EMGs) using magnetic levitation architectures for mechanical vibration energy harvesting are a promising technology be tailored to specific needs and provide low-cost electric powering both small-scale large-scale devices. They also present non-complex design, with low maintenance requirements stable performance long periods time. Despite these prominent features, their complex non-linear hysteresis-based resonant characteristics makes optimization hard achieve still addressed function the input excitation. Numerical experimental results here provided demonstrate effectiveness new concept EMG aims dynamically adapt coil-array architecture throughout its operation ensure maximum harvested power optimize transduction mechanism efficiency. self-adaptive motion-driven levitation-based autonomously rearranges each coil independently instantaneous time-varying levitating magnet (LM) position. features two dynamic switching strategies: (i) on/off switching, by short circuiting, transmission gate switches, coils without influence on electromotive force; (ii) reversing polarity avoid sum forces cancels other. Average output powers 635 mW (up ∼4.1 W peak power) were obtained only 4-centre (out 14) permanently active coils, while 292 833 achieved 14-coils connected under optimal load conditions harmonic translational excitations 15 Hz frequency 20 mm amplitude. However, adaptive generator was able an impressive average 3 same conditions. Up 14-fold larger 5.5-fold efficiency potential proposed self-adaptation system enhancing total conversion general widespread vibrations.
Language: Английский
Citations
2
Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 369, P. 115198 - 115198
Published: Feb. 22, 2024
Language: Английский
Citations
0
Sustainable Energy Technologies and Assessments, Journal Year: 2024, Volume and Issue: 70, P. 103946 - 103946
Published: Aug. 23, 2024
Language: Английский
Citations
0
Sensors and Actuators A Physical, Journal Year: 2024, Volume and Issue: 378, P. 115833 - 115833
Published: Aug. 30, 2024
Language: Английский
Citations
0