Homogenized Finite Element Analysis for Multi-Turn Coils Considering Parasitic Capacitances

This study presents a novel homogenized finite element (FE) method that can consider parasitic capacitances of the multi-turn coils. In this method, a total capacitance, describing the parasitic capacitances, is parallel to the homogenized region, and the resonant peak is identified only by solving the electrostatic and magnetostatic FE analysis. The proposed method is applied to the solenoid and planar coil models, and it is confirmed that the impedance characteristics including the resonant peaks can be represented. Moreover, the computing cost is shown to be significantly lower than that of the conventional full-wave FE analysis.