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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.28 No.1
- 발행연도
- 2021.1
- 수록면
- 29 - 41 (13page)
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초록· 키워드
오류제보하기
To improve the energy conversion efficiency and working frequency bandwidth of a single frequency piezoelectric vibration energy harvester, a new type of hybrid vibration energy harvester is developed which is combined with the mechanism of piezoelectric and electromagnetic energy conversion. The system comprises of a PZT cantilever beam, an elastic suspended magnetic mass, a magnet block attached to the end of the cantilever beam and a resonator. The addition of resonator can not only increase the mode, but also adjust the frequency of harvester flexibly. Nonlinear magnetic force of magnet block not only broadens the frequency band and improves the output performance of the system, but also changes the resonant frequency to make the harvester have better adjustable performance. On this basis, an improved electromechanical coupled analytical model of continuum is proposed which can be solved by the Runge-Kutta algorithm and the influence of different factors (the mass and spring stiffness of the resonator, as well as the electromechanical coupling coefficient, electromagnetic coupling coefficient, magnet mass and magnetic flux) on the output are analyzed. According to the prototype of the vibration energy harvester developed, an experimental system was built. The performance of the independent and hybrid energy harvesters is evaluated by experimental and analytical methods. The peak output voltage of the piezoelectric part was about 4 times that of the electromagnetic part. The peak output current of the electromagnetic part is about 30 times that of the piezoelectric part. The study results show that the proposed new hybrid vibration energy harvester can achieve a wider frequency range and multimodal vibration energy harvesting. In addition, the bandwidth and power of the harvester can be dynamically adjusted by changing the resonator or electromechanical coupling coefficient, and the bandwidth of the harvester can also be adjusted by changing the quality and characteristics of the magnet.
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참고문헌 (20)
참고문헌 신청
Lu, L. -H. / 1997 / Dynamical Systems And Numerical Analysis / IEEE Computational Science and Engineering 4(2):86~87
S F Ali / 2010 / Piezoelectric energy harvesting with parametric uncertainty / Smart Materials and Structures 19(10):105010~105019
S P Beeby / 2006 / Energy harvesting vibration sources for microsystems applications / Measurement Science and Technology 17(12):R175~R195
John Cannarella / 2011 / Coupling Factor Between the Magnetic and Mechanical Energy Domains in Electromagnetic Power Harvesting Applications / IEEE Transactions on Magnetics 47(8):2076~2080
Vinod R Challa / 2008 / A vibration energy harvesting device with bidirectional resonance frequency tunability / Smart Materials and Structures 17(1):015035~15010
S F Ali / 2010 / Piezoelectric energy harvesting with parametric uncertainty / Smart Materials and Structures 19(10):105010~105019
S P Beeby / 2006 / Energy harvesting vibration sources for microsystems applications / Measurement Science and Technology 17(12):R175~R195
John Cannarella / 2011 / Coupling Factor Between the Magnetic and Mechanical Energy Domains in Electromagnetic Power Harvesting Applications / IEEE Transactions on Magnetics 47(8):2076~2080
Vinod R Challa / 2008 / A vibration energy harvesting device with bidirectional resonance frequency tunability / Smart Materials and Structures 17(1):015035~15010
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