The Broadband Equivalent Circuit Model of the Coil and the Parameter Calculation

In non-sinusoidal operating scenarios, the broadband coil equivalent circuit model is essential for analyzing the operational state of devices or systems. This paper develops a circuit model consisting of multiple resistors, inductors, and capacitors, which accurately fits the impedance characteristics of the coil over a wide frequency range. The broadband model is applied to fit the impedance curves of four different types of coils, and its accuracy and effectiveness are validated through comparison with experimental measurements. Finally, circuit experiments are conducted to further verify the model's applicability and reliability in practical circuit implementations.