The electromechanical coupling analysis model of spherical collision triboelectric nanogenerator

The spherical collision triboelectric nanogenerator (SC-TENG) exhibits dual effects of vibration control and energy harvesting. To study the vibration control and energy harvesting characteristics of SC-TENG at the same time, this paper proposes a single degree of freedom electromechanical coupling analysis model and explores relative parameters affecting SC-TENG’s effect in both vibration control and energy generation, including particle mass ratio, excitation frequency, and motion radius. In order to study the effectiveness of the equivalent single particle method of the electromechanical coupling analysis model, the SC-TENG is simulated, including the collision and friction electrification between multiple particles and the container. The comparison between the electromechanical coupling analysis model and the experimental data shows that the theoretical model can accurately predict the experimental results when the particle filling rate is less than 60%. Thus, the electromechanical coupling analysis model can be used to predict that the dual effects of SC-TENG under the particle fill rate are below 60%.