Research on cam frequency-increasing hybrid piezoelectric electromagnetic energy harvester with center symmetric structure

Zhou, Jianwen; He, Lipeng; Yu, Gang; Liu, Lei; Gu, Xiangfeng; Wang, Yuecheng; Cheng, Guangming

doi:10.1016/j.renene.2021.12.106

Cited by 19 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous study, a hybrid energy harvester was constructed using two piezoelectric sheets with PZT dimensions of 40 × 20 × 0.2 mm 3 and two 700-turn coils. Under the same magnet motion, the output power of the piezoelectric unit (1.05 mW) is 52.5 times higher than that of the electromagnetic unit (0.02 mW) [43]. Compared to conventional wind generators, the G-PBEH utilizes a piezoelectric converter that provides three times higher energy density than electromagnetics [44].…”

Section: Robustnessmentioning

confidence: 99%

Piezoelectric breeze energy harvester with mechanical intelligence mechanism for smart agricultural monitoring systems

Zheng,

Han,

Yang

et al. 2024

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

In this paper, a piezoelectric breeze energy harvester with a mechanical intelligence mechanism for smart agricultural monitoring systems (G-PBEH) is proposed. Different from the conventional magnetically coupled piezoelectric cantilever beam harvesters where the end magnet is mostly fixed, the G-PBEH has movable magnets in a fixed cylindrical channel. Which could achieve a mechanical intelligence mechanism with the tuned magnets on the shell, contributing to increasing voltage frequency and widening wind bandwidth. The effects of cylindrical channel length (L) and tuned magnet diameter (D) on performance were investigated. The experimental findings reveal that when L is 10 mm and D is 8 mm, the prototype starts at 2 m/s, and the highest voltage and power are 17.9 V and 944.07 μW (150 kΩ) at 8 m/s. Compared to L is 5 mm (magnet fixed), the voltage waveform has a 28.6% increase in the quantity of peaks. Besides, the voltage is larger than 3 V occupying 91.6% of the experimental wind bandwidth. The application experiment demonstrates that the G-PBEH can be used as a reliable power supplier, which can facilitate the progress of smart monitoring systems for simplified greenhouses in remote areas.

show abstract

Section: Robustnessmentioning

confidence: 99%

Piezoelectric breeze energy harvester with mechanical intelligence mechanism for smart agricultural monitoring systems

Zheng,

Han,

Yang

et al. 2024

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Yet, as the excited magnets reduce, it has a lower output power. Zhou et al [27] designed a hybrid piezoelectric electromagnetic energy harvester. Hybridizing piezoelectric and electromagnetic power generation to increase output voltage and the peaking voltage is 56.9 V. Yu et al [28] studied a mirror-image rotating piezoelectric energy harvester.…”

Section: Introductionmentioning

confidence: 99%

A piezoelectric energy harvester with parallel connection using beams of different lengths to improve output performance

Wang,

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

The purpose of this paper is to design an energy harvester to improve output performance. The theoretical analysis of the piezoelectric energy harvester has been performed. Reducing the length of one cantilever beam, thereby changing the relative impact position, causing the amplitude of the two cantilever beams to be different, and making the waveform of two beams different. Some experiments have been tested to verify the feasibility of the device and compare the differences with Plan A. Based on the experiment, it can be concluded that the output voltage is higher at both high and low speeds. When the rotation speed is 255 r min−1, Plan B arrives at the optimum speed, and the maximum output voltage is 166.2 V, which significantly increases from 97.2 V of Plan A. The maximum output power is 0.966 W under the load resistance of 10 kΩ. The maximum voltage is 157.7 V under the load resistance of 120 kΩ. Nevertheless, the maximum voltage and maximum power of Plan A are 92.62 V and 0.52 W. Besides, the prototype has fewer materials and nearly 1.5 times the energy conversion rate compares to Plan A. It can light up 42 LEDs easily and can adapt to environmental vibration frequency changes, so it has an intensely adaptable and outstanding performance in practical applications.

show abstract

“…Shi et al [26] proposed a piezoelectricelectromagnetic frequency up-conversion multi-directional vibration energy harvester to harvest human motion energy, which was tested at 1-15 Hz. Zhou et al [27] demonstrated a cam frequency-increasing hybrid energy harvester (HEH) with a center symmetric structure. It could obtain 1.49 mW in the range of 1-10 Hz.…”

Section: Introductionmentioning

confidence: 99%

A hybrid energy harvester with dual-frequency-up-conversion mechanism for ultra-low frequency rotational motion under 1.5 Hz

Li,

Han,

Rui

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This paper proposes a hybrid energy harvester (HEH) based on dual-frequency-up-conversion mechanism, which is suitable for ultra-low frequency rotation. This mechanism takes full advantage of the periodic excitation provided by gravity to achieve two harvesting responses in one cycle. HEH consists of the piezoelectric energy harvester (PEH) and electromagnetic energy harvester. The magnet component achieves frequency up-conversion of PEH by impact, and also induces electrical energy from the coil, thus coupling two parts together to form continuous energy harvesting. The electromechanical coupling model of HEH is established, and the characteristics are in-depth analyzed via experiments and simulations. PEH can attain a bandwidth of 1.4 Hz with an open-circuit output voltage above 5.6 V, which indicates the frequency up-conversion helps the piezoelectric cantilevers to break through the resonance limit and obtain the higher output. HEH can combine the advantages of two energy harvesting parts, obtaining the maximum power of 6.598 mW under 1.5 Hz. The results show that the dual-frequency-up-conversion mechanism greatly improves the efficiency of energy conversion and HEH has the ability to power low-power sensors at ultra-low frequencies.

show abstract

Research on cam frequency-increasing hybrid piezoelectric electromagnetic energy harvester with center symmetric structure

Cited by 19 publications

References 25 publications

Piezoelectric breeze energy harvester with mechanical intelligence mechanism for smart agricultural monitoring systems

Piezoelectric breeze energy harvester with mechanical intelligence mechanism for smart agricultural monitoring systems

A piezoelectric energy harvester with parallel connection using beams of different lengths to improve output performance

A hybrid energy harvester with dual-frequency-up-conversion mechanism for ultra-low frequency rotational motion under 1.5 Hz

Contact Info

Product

Resources

About