Research on Output Characteristics of a Circular Dielectric Elastomer Generator

doi:10.12096/j.2096-4528.pgt.23058

Abstract

Abstract:

Objectives Energy is an important physical basis for economic and social development in modern world. Accompanied by the gradual depletion of traditional energy sources, the collection and utilization of renewable energy sources has become significant. Dielectric elastomer is a new soft intelligent material with electromechanical bidirectional coupling characteristics, which can be used to make the dielectric elastomer generator to generate electricity. Methods A circular dielectric elastomer generator was designed and fabricated firstly. Then, by analyzing its workflow, generator theory and energy conversion mechanism, the mathematical model of the circular dielectric elastomer generator was established to describe the relationship between its power generation performance and the bias voltage, external load and pre-stretching multiplier. Finally, the validity of the established mathematical model was verified by practical experiments. Results The increase of pre-stretching multiplier, stretching displacement and bias voltage can help to improve the power generation performance of the circular dielectric elastomer generator. Conclusions This work provides the guidance for the design of dielectric elastomer generators.

Key words: dielectric elastomer generator, energy collection, power generation performance, bias voltage, pre-stretch

CLC Number:

TK 01

Mingyi ZHANG, Peng HUANG, Yawu WANG. Research on Output Characteristics of a Circular Dielectric Elastomer Generator[J]. Power Generation Technology, 2024, 45(3): 517-526.

Figures/Tables 11

Fig. 1 Physical picture of circular DEG

Fig. 2 Production process of circular DEG

Fig. 3 Experimental platform of DEG energy harvesting

Fig. 4 Circuit schematic diagram of DEG experimental system

Fig. 5 Generator theory diagram of DEG

Fig. 6 Schematic diagram of DEG structure

Fig. 7 Curve of voltage values on both sides of DEG over time

Fig. 8 Variation curve of DEG output voltage with various influencing factors

Fig. 9 Variation curve of DEG power generation with various influencing factors

Tab. 1 Tensile displacement of DEG under different loads mm

m/g	$λ p$ =2	$λ p$ =3	$λ p$ =4
50	9.153	10.033	8.233
100	15.357	17.042	14.550
150	19.817	23.150	20.933
200	26.030	29.067	26.600

Tab. 1 Tensile displacement of DEG under different loads mm

m/g	$λ p$ =2	$λ p$ =3	$λ p$ =4
50	9.153	10.033	8.233
100	15.357	17.042	14.550
150	19.817	23.150	20.933
200	26.030	29.067	26.600

Fig. 10 Variation curve of DEG energy conversion efficiency with various influencing factors

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