2.College of Engineering, Zhejiang Normal University, Jinhua 321000, China)

 Abstract: Aiming at efficiency bottleneck problem in dielectric elastomer generator (DEG) research, electromechanical energy conversion method was studied. A new nonlinear method of electromechanical energy conversion was presented. After the analysis of basic mechanism, the theoretical model and Matlab/simulink simulation model of the nonlinear method was established to study the influence of load resistance value and quality factor on electromechanical conversion efficiency. By optimizing the materials, mechanical transmission structure, circuit component parameters configuration and switch off time, the quality factor Q was improved, the energy loss caused by voltage inversion was reduced, and the electromechanical efficiency was improved further. The experimental results show that nonlinear method can make the DEG electromechanical conversion efficiency 2.5 times higher than that of standard conversion method. Due to the effect of nonlinear conversion, voltage amplitude of DEG enhanced significantly, extending the energy cycle along voltage axis direction. The research results have great significance for in depth study of DEG.

 Key words: dielectric elastomer generators(DEG); electromechanical transformation; generating efficiency; nonlinear method