Dynamic‐transient modeling and performance evaluation of a multilayer variable‐capacitance energy conversion system

This paper proposes an analytical method for dynamic‐transient modeling of a variable capacitance energy conversion system as a multi‐layer synchronous machine. The dynamic‐transient models are achieved based on the analytical formulas and are valid for all machine structures with flat electrode plates. In addition, the equivalent circuits and operational characteristics are obtained for both dynamic‐transient and steady‐state conditions. The analytical model is evaluated and well verified through both experimental test results and computer‐aided numerical methods such as finite element analysis (FEA). The numerical 3D‐FEA simulations are performed using Ansys Maxwell 3D software. Design and manufacturing of the experimental prototype are performed using printed circuit board (PCB) technology. The variable capacitance machines (VCMs) have a low weight and volume, and fast transient response. The results show that the electrical current level of the VCMs is very low which can be effective in reducing electrical losses. In addition, regarding the duality between VCMs and magnetic machines, this paper compares some of the features and behaviors of these two groups of energy conversion systems. This paper proposes an analytical method for dynamic‐transient modeling of a variable capacitance energy conversion system as a multi‐layer axial‐field synchronous machine valid for all machine structures with flat electrode plates.