A dual impact driven frequency up-conversion piezoelectric energy harvester for ultralow-frequency and wide-bandwidth operation

Yin, Zuozong; Gao, Shiqiao; Jin, Lei; Sun, Yaoqiang; Wu, Qinghe; Zhang, Xiyang; Guo, Shengkai

doi:10.1016/j.sna.2021.112961

Cited by 15 publications

(3 citation statements)

References 27 publications

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“…Meanwhile, although the above piezoelectric energy harvesters can increase the harvesting bandwidth, environmental vibrations are often at low frequencies, leading to inefficient energy harvesting. Frequency up-conversion [18] is usually employed to prevent energy loss brought on by structural changes and increase the efficiency of piezoelectric energy harvesting. Wu et al [19] proposed an innovative approach for frequency up-converting energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Double-speed piezoelectric–electromagnetic hybrid energy harvester driven by cross-moving magnets

Shi,

Hu,

Xia

et al. 2023

Smart Mater. Struct.

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Energy harvesters have gained popularity as green energy devices that transform mechanical energy from the environment into electricity. However, traditional piezoelectric energy harvesters are limited by narrowband response, and the output capability of electromagnetic energy harvesters is dependent on the rate of magnetic field changes on the coil, which is constrained by the device’s structure. To address these issues, this paper presents a hybrid energy harvester (HEH) that combines coils and arc magnets, forming an electromagnetic component (EMEH). Additionally, it incorporates a piezoelectric cantilever beam (PECB) as a piezoelectric component (PEH). Unlike traditional electromagnetic energy harvesters, this design utilizes two arc magnets to drive the rotating brackets, thereby achieving the opposite movement of the coil and magnet. This increases the relative velocity and consequently enhances the rate of magnetic field change on the coil. Simultaneously, it achieves frequency up-conversion by inducing vibration in the PECB through magnetic force. Under an external excitation of 5.5 Hz, the PEH achieves a maximum power of 0.362 mW at a load resistance of 330 kΩ, while the EMEH with 1200 turns of coil attains a maximum power of 8.74 mW at a load resistance of 110 Ω. The power density of the PEH reaches 94.96 μW cm−3. These results highlight the significant potential of the proposed energy harvester for powering low-power devices.

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Section: Introductionmentioning

confidence: 99%

Double-speed piezoelectric–electromagnetic hybrid energy harvester driven by cross-moving magnets

Shi,

Hu,

Xia

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…At present, the methods to realize broadband vibration energy harvesting include: tuning method [1,2], nonlinearity method [3][4][5][6][7], multi-modal method [8][9][10], frequency upconversion method [11][12][13][14], collision method [15][16][17], etc. The nonlinearity method mainly designs the magnet appropriately in the structure and uses the nonlinear magnet force to realize the broadband vibration energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

“…Through the magnet at the edge of the eccentric pendulum and the magnet at the end of the piezoelectric beam, the frequency up-conversion is realized, so as to realize the extremely low frequency vibration in the harvesting environment. The above structure realizes low frequency (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) or even ultralow frequency (5-10 Hz) harvesting through the frequencydoubling characteristic of pendulum structure, and meanwhile increases the output power of the harvester.…”

Section: Introductionmentioning

confidence: 99%

Broadband vibration energy harvester based on nonlinear magnetic force and rotary pendulums

Yan

Dai

Zhang

et al. 2021

Smart Mater. Struct.

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A broadband vibration energy harvester based on nonlinear magnetic force and rotary pendulums is proposed in this paper. The harvester is mainly composed of a magnetoelectric transducer and a rotary pendulum fixed with four permanent magnets. In order to improve the working bandwidth of the harvester, two pairs of permanent magnets are added in the middle of the rotary pendulum by using magnetic nonlinearity. The mechanical–magnetic–electrical analytical model of the harvester is established, and the theoretical value obtained by the model is basically consistent with the experimental value. The results show that the harvester has a strong nonlinearity through the magnetic force. When the acceleration is 0.4 g, some typical testing results are as follows: the resonant frequency is 19 Hz, maximum peak–peak voltage is 94.1 V, half power bandwidth is 15.8 Hz, center frequency is 26.9 Hz, and the ratio of half power bandwidth to the center frequency is 58.73 % .

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Nonlinear dynamics of a new energy harvesting system with quasi-zero stiffness

et al. 2022

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A dual impact driven frequency up-conversion piezoelectric energy harvester for ultralow-frequency and wide-bandwidth operation

Cited by 15 publications

References 27 publications

Double-speed piezoelectric–electromagnetic hybrid energy harvester driven by cross-moving magnets

Double-speed piezoelectric–electromagnetic hybrid energy harvester driven by cross-moving magnets

Broadband vibration energy harvester based on nonlinear magnetic force and rotary pendulums

Nonlinear dynamics of a new energy harvesting system with quasi-zero stiffness

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