Method for calculating parasitic capacitance of coupled ring inductor

The invention relates to a coupling ring inductor parasitic capacitance calculation method, and belongs to the technical field of electronic information. The wire inner diameter, the wire outer diameter, the single-turn winding length, the insulating layer relative dielectric constant, the distance between two adjacent turns of coils and the number of turns of the coils of the target coupling ring inductor are obtained; simulating an electric field line path between the coils by using a parabola, constructing an electric field line path equation between two adjacent turns of coils, and calculating air gap parasitic capacitance between the two adjacent turns of coils based on the electric field line path equation, the length of a single-turn winding and the outer diameter of a wire; calculating stray capacitance between two adjacent turns of coils based on the insulating layer stray capacitance and the air gap stray capacitance; and calculating the total stray capacitance of the target coupling ring inductor b