The use of non-linear power inductors, intended as devices exploited up to a current at which the inductance is halved, is of great interest in switched-mode power supplies (SMPSs). Indeed, it allows the use of lighter and cheaper inductors improving the power density. On the other hand, the analysis of SMPSs equipped with non-linear inductors requires appropriate modeling of the inductor reproducing the inductance versus current. This paper compares two main analytical models proposed in the literature: the former is based on a polynomial, and the latter exploits the arctangent function to reproduce the non-linearity of the inductance. Performance is compared by considering the effort of retrieving the model’s parameters, evaluating a current profile by the characteristic equation of the inductor, and exploiting the two models to simulate a switched-mode power supply. Results are given both in terms of computation time and accuracy with reference to experimental values, highlighting the pros and cons of each model.

Scire D., Lullo G., Vitale G. (2022). Non-Linear Inductor Models Comparison for Switched-Mode Power Supplies Applications. ELECTRONICS, 11(15) [10.3390/electronics11152472].

Non-Linear Inductor Models Comparison for Switched-Mode Power Supplies Applications

Scire D.
Primo
;
Lullo G.
Secondo
;
Vitale G.
Ultimo
2022-08-08

Abstract

The use of non-linear power inductors, intended as devices exploited up to a current at which the inductance is halved, is of great interest in switched-mode power supplies (SMPSs). Indeed, it allows the use of lighter and cheaper inductors improving the power density. On the other hand, the analysis of SMPSs equipped with non-linear inductors requires appropriate modeling of the inductor reproducing the inductance versus current. This paper compares two main analytical models proposed in the literature: the former is based on a polynomial, and the latter exploits the arctangent function to reproduce the non-linearity of the inductance. Performance is compared by considering the effort of retrieving the model’s parameters, evaluating a current profile by the characteristic equation of the inductor, and exploiting the two models to simulate a switched-mode power supply. Results are given both in terms of computation time and accuracy with reference to experimental values, highlighting the pros and cons of each model.
Settore ING-INF/01 - Elettronica
https://www.mdpi.com/2079-9292/11/15/2472/htm
Scire D., Lullo G., Vitale G. (2022). Non-Linear Inductor Models Comparison for Switched-Mode Power Supplies Applications. ELECTRONICS, 11(15) [10.3390/electronics11152472].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/567924
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