The methods of the parasitic capacitance cancellation of the inductor from EMI filter

In this paper, a new method to cancel the effect of the parasitic capacitance in a practical toroidal inductor has been introduced. This method is based on the topologic theory. Through the simulation of the model using this method, it is clear that after the parasitic capacitance cancellation using this method, the expression of the practical toroidal inductor is greatly improved around the resonant frequency.