Nonlinear models of power inductors: A survey

Oliveri, Alberto; Lodi, Matteo; Storace, Marco

doi:10.1002/cta.3147

Cited by 13 publications

(4 citation statements)

References 97 publications

(221 reference statements)

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“…Power loss that occurs in an inductor is splited as core loss (P core ) and winding loss(P w ) 49,50 4.4.1 | Core loss (P core ) Core loss is obtained by the Steinmetz empirical equation as follows: 50…”

Section: Charging Inductor Loss (P Lch )mentioning

confidence: 99%

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Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Debela

Singh

Sood

2022

Circuit Theory & Apps

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In this paper, a reduced‐component switched‐capacitor boost multilevel inverter (SC‐BMLI) topology is proposed for off‐grid and on‐grid applications. Recently, switched‐capacitor‐based multilevel inverter (MLI) topologies have been employed to avoid the need for multiple isolated direct current (DC) sources when compared with traditional cascaded MLIs. To generate a nine‐level stepped‐up voltage across the load, the SC‐BMLI needs only eight power switches and two capacitors. To get the appropriate nine‐level switching pattern, phase disposition pulse width modulation (PD‐PWM) has been used. An extended 13‐level boost multilevel inverter (BMLI) is also discussed in this paper. The proposed topology is connected to the grid to control the grid current using synchronous reference frame‐based proportional–integral controller. A small‐signal modeling and analysis has been discussed in detail for the phase‐locked‐loop (PLL). Moreover, to prove the superior performance of the SC‐BMLI, comparative analysis with an existing single DC source MLI has also been performed. The feasibility of the 9‐level and 13‐level proposed topologies, with and without the grid‐connection, is evaluated by Matlab/Simulink simulation and verified by an experimental study using the OPAL‐RT 4510 real‐time platform. Further, prototype model of nine‐level BMLI has been developed in the laboratory using DSpace 1103 controller and results are compared with simulation.

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Section: Charging Inductor Loss (P Lch )mentioning

confidence: 99%

“…Power loss that occurs in an inductor is splited as core loss ( P core ) and winding loss( P w ) 49,50 …”

Section: Calculation Of Power Lossesmentioning

confidence: 99%

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Debela

Singh

Sood

2022

Circuit Theory & Apps

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“…Passive components, such as capacitors, inductors, and resistors, are widely used in various electronic systems, [1][2][3][4] and play important roles in tuning, coupling, filtering, frequency selection, current limiting, voltage dividing, and other functional circuits. Due to the development trend of miniaturization, integration, and multi-function, the electromagnetic environment inside electronic systems is becoming more and more complex, which often gives rise to electromagnetic compatibility (EMC) problems.…”

Section: Introductionmentioning

confidence: 99%

An equivalent modeling method of passive components with multi‐resonant frequency

Pan

Ren

Spiazzi

et al. 2023

Circuit Theory & Apps

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High-frequency characteristics of passive components are crucial to the electromagnetic compatibility (EMC) of an electronic system, and modeling of passive components is of significance for EMC analysis. However, challenges remain in the modeling of passive components with multiple resonant frequencies. In this paper, a method for establishing equivalent models of multiresonant frequency passive components, including capacitors, inductors, and resistors, is proposed. Firstly, high-frequency equivalent circuit topologies of the multi-resonant frequency passive components, which are simple, easy to understand, and can be applied to the modeling of passive components with various impedance characteristics, are developed. Secondly, a calculation method of equivalent circuit parameters based on least squares and particle swarm optimization (PSO) is presented, which is not sensitive to the initial value, only needs the estimated range of the equivalent circuit parameters, and very suitable for getting the parameters of equivalent circuit models accurately and efficiently. Finally, to validate the method, some SPICE models of single components are established, and a PCB-level EMC analysis is implemented. The comparisons of the simulated and experimental results show the validity and accuracy of the method. The method is very useful for future components modeling when doing EMC design or other high-frequency designs.

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“…Among the other analytical models, summarized by [25], the neural model proposed in [26] provides very good results with few hidden neurons; however, the learning dataset required 250 points provided by manufacturers at a constant temperature. The piecewiseaffine formulation [27] improves the use of the computational resources of [28].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Current for a Non-Linear Power Inductor Including Temperature in DC-DC Converters

2023

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A method for estimating the current flowing through a non-linear power inductor operating in a DC/DC converter is proposed. The knowledge of such current, that cannot be calculated in closed form as for the linear inductor, is crucial for the design of the converter. The proposed method is based on a third-order polynomial model of the inductor, already developed by the authors; it is exploited to solve the differential equation of the inductor and to implement a flux model in a circuit simulator. The method allows the estimation of the current up to saturation, intended as the point at which the differential inductance is reduced to half of its maximum value. The current profile depends also on the inductor temperature. Based on this, the influence of core temperature on the conduction time of the power switch was determined. This study shows that the exploitation of saturation requires a proper value of the conduction time value that depends on the temperature. The theoretical analysis has been experimentally verified on a boost converter and is valid for the entire class of DC-DC converters in which the power inductor is subjected to a constant voltage for a given time. The simulations agree with the experimental data from a case study concerning conduction time and temperature.

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Nonlinear models of power inductors: A survey

Cited by 13 publications

References 97 publications

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

An equivalent modeling method of passive components with multi‐resonant frequency

Assessment of the Current for a Non-Linear Power Inductor Including Temperature in DC-DC Converters

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