Hossain Nabid Aunjum, Razavi Mir Jalil, Towfighian Shahrzad
Binghamton University, 4400 Vestal Parkway E., Binghamton, NY 13902, United States of America.
J Micromech Microeng. 2020 Apr;30(4). doi: 10.1088/1361-6439/ab6c74. Epub 2020 Mar 2.
One of the associated factors that controls the performance of a triboelectric generator (TEG) is the mechanical deformation of the dielectric layer. Therefore, a good contact model can be a prominent tool to find a more realistic and efficient way of determining the relationships between the contact and electrical output of the generator. In this study, experiments are conducted on a vertical contact mode triboelectric generator under an MTS machine. The open-circuit voltages are measured at different loads imposed by the MTS by controlling the cyclic displacement of the top tribo layer of the generator. A finite-element-based theoretical model is developed to explain the behavior of the generator during the experiments. The 2D-contact problem of the micro-structured tribo layers is simulated and then the contact results are integrated into 3D to find the actual contact area between the two surfaces. These numerical contact results improve the existing theoretical model by evaluating the correct surface charge density and contact area as a function of the input parameters. The excellent agreement between our experimental and theoretical results illustrates that theoretical modeling could be used as a robust approach to predict the mechanical and electrical performance of TEGs. In addition, some parametric studies of the harvester are presented here for different geometrical parameters of the microstructures.
控制摩擦电发电机（TEG）性能的相关因素之一是介电层的机械变形。因此，一个好的接触模型可以成为找到更现实、更有效的方法来确定发电机接触与电输出之间关系的重要工具。在本研究中，在MTS机器下对垂直接触模式摩擦电发电机进行了实验。通过控制发电机顶部摩擦层的循环位移，在MTS施加的不同负载下测量开路电压。建立了基于有限元的理论模型来解释实验过程中发电机的行为。对微结构摩擦层的二维接触问题进行了模拟，然后将接触结果整合到三维中以找到两个表面之间的实际接触面积。这些数值接触结果通过评估作为输入参数函数的正确表面电荷密度和接触面积，改进了现有的理论模型。我们的实验结果与理论结果之间的良好一致性表明，理论建模可以作为预测TEG机械和电气性能的可靠方法。此外，这里针对微结构的不同几何参数对收集器进行了一些参数研究。
