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Rotary disk multi-phase freestanding-electret generator with enhanced power and low ripple output
Nano Energy ( IF 17.6 ) Pub Date : 2021-01-18 , DOI: 10.1016/j.nanoen.2021.105787
Zibo Wu , Shiwen Wang , Zeyuan Cao , Rong Ding , Xiongying Ye

Energy harvesters with higher power and direct-current (DC) output are of great significance for the energy supply of electronic devices. Here, we demonstrate rotary disk multi-phase freestanding-electret generators (MFEGs) with enhanced output power and low ripple output via a novel design. This novel design can enhance the output power by the reduction of generator capacitance and the improvement of the transferable charge density through positively utilizing the edge effect. The factors which both theoretical and experimental results show that the two- and three-phase FEGs have higher maximum output power than that of the conventional single-phase FEG (SFEG) and the two-phase FEG (TFEG) has the highest one. To further improve the output power, we optimize the structural parameters of TFEG and obtain 78.4% higher maximum output power than that of the optimal SFEG in experiment. Moreover, MFEGs connected to rectifier bridges obtain almost DC outputs. And since each phase of MFEGs is independent, the output of each phase can be utilized separately, for example, one as sensing signal and the other as energy output, providing a broad prospect for self-powered sensing.



中文翻译:

具有增强的功率和低纹波输出的转盘式多相独立式驻极体发电机

具有更高功率和直流(DC)输出的能量收集器对于电子设备的能量供应具有重要意义。在这里,我们通过新颖的设计演示了具有增强的输出功率和低纹波输出的转盘式多相独立式驻极体发电机(MFEG)。通过积极利用边缘效应,这种新颖的设计可以通过减小发电机电容和提高可转移电荷密度来提高输出功率。理论和实验结果均表明,两相和三相FEG的最大输出功率高于传统的单相FEG(SFEG),而两相FEG(TFEG)最高。为了进一步提高输出功率,我们优化了TFEG的结构参数,得到78。在实验中,最大输出功率比最佳SFEG高出4%。此外,连接到整流桥的MFEG几乎可获得直流输出。而且由于MFEG的每个相都是独立的,所以每个相的输出都可以单独使用,例如,一个用作感应信号,另一种用作能量输出,为自供电感应提供了广阔的前景。

更新日期:2021-01-28
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