Switching Power Supplies with Ferrite Inductors in Sustainable Saturation Operation

Capua, Giulia Di; Femia, N.; Stoyka, Kateryna

doi:10.1016/j.ijepes.2017.06.003

Cited by 55 publications

(15 citation statements)

References 15 publications

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“…1. This is a significant simplification since the magnetic flux density B(x, y, z) due to such a material can now be easily calculated in three-dimensions using the order-reduced expression (1). The method is adjusted to two different applications as discussed in the next Sections.…”

Section: Outline Of the Methods Of Equivalent Currentsmentioning

confidence: 99%

“…In recent years, there have been a number of papers proposing to use smaller inductors in the intermittent region of moderate saturation. The inductance displays a dependence on current in this region, which makes the design of a converter more challenging, but such an inductor would consume less power and take up a smaller area [1]- [3]. The main aim of modelling in this case is to calculate the magnetic flux as a function of the external magnetic field and, as a result, the inductance of an inductor [4], [5].…”

Section: Introductionmentioning

confidence: 99%

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Method of Equivalent Currents for the Calculation of Magnetic Fields in Inductors and Magnets with Application to Electronics

Sokolov

Kennedy

Blokhina

2019

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

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Section: Outline Of the Methods Of Equivalent Currentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method of Equivalent Currents for the Calculation of Magnetic Fields in Inductors and Magnets with Application to Electronics

Sokolov

Kennedy

Blokhina

2019

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

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“…, m − 1) are the knee points of the PWA function, with X h+1 > X h . It was shown in [15,18] that the L vs. i curve shifts towards the left as the core temperature increases. This phenomenon is reproduced by the behavioral state variable J = J(p k , t), which does not directly represent a physical quantity and takes into account the effect of core temperature variations [19].…”

Section: T Kmentioning

confidence: 99%

“…Recent studies [14][15][16] showed that it was possible to design smaller and lighter SMPS by exploiting ferrite-core inductors operating in partial saturation. In this situation, the inductance drops as the inductor current increases, with a strong dependence on the core temperature (at higher temperatures, the inductance starts dropping for lower current values).…”

Section: Introductionmentioning

confidence: 99%

Online Estimation of the Current Ripple on a Saturating Ferrite-Core Inductor in a Boost Converter

Lodi

Oliveri

2020

Sensors

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In this paper, a nonlinear observer is proposed for the estimation of the current ripple in a ferrite-core inductor working in partial saturation, mounted on a boost converter. The estimator is based on a recently proposed nonlinear inductance model, which expresses the inductance as a function of the inductor current, taking into account also the non-negligible effects of the core temperature. The proposed observer is implemented on a low-cost microcontroller and tested, both offline and online, on a real boost converter with different operating conditions. The offline tests show a satisfactory estimation accuracy both during the electrical (fast) and thermal (slow) transients. Due to the high microcontroller latency, some delays and inaccuracies occur during electrical transients in the online tests. This work suggests that, in order to exploit the observer for control purposes, the target architecture should be a high-performance microcontroller, a system-on-chip, or a field programmable gate array, where parallelism can be exploited to speed-up the computations. The proposed implementation can be instead suitable for switch-mode power supply (SMPS) monitoring purposes.

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“…18 In addition, the winding resistance and the leakage inductance increases with the turns ratio. 19 The energy dissipated in winding resistances and the leakage energy trapped in the leakage inductances contribute significant losses to the converter. The leakage energy can be recycled by the use of active or passive clamp circuits.…”

Section: Introductionmentioning

confidence: 99%

A wide load range ZVS high voltage gain hybrid DC‐DC boost converter based on diode‐capacitor voltage multiplier circuit

Priyadarshi

Kar

Karanki

2019

Int Trans Electr Energ Syst

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Summary In this paper, a single‐switch hybrid high voltage gain boost converter topology employing zero‐voltage switching (ZVS) feature is proposed. The proposed converter can achieve high voltage gain with soft switching operation over a wide range of load. The topology is a combination of the Cockcroft‐Walton diode‐capacitor voltage multiplier and a conventional boost converter, which results in a hybrid DC‐DC converter. The diode‐capacitor ladder enables the converter to achieve high voltage gain without a transformer or coupled inductor. Because of its transformerless design, single switch with lower duty cycle requirement, and ZVS feature, the efficiency of the converter is improved significantly. Moreover, due to the input inductor, it is able to provide lower input current ripple and variable fractional voltage gain, which is a key requirement for maximum power point tracking (MPPT) in photovoltaic application. A 480‐W hardware prototype with 48‐V input voltage and 450‐V output voltage is developed, and experimental results are presented to validate the efficacy of the proposed converter. The total achievable efficiency is above 95.4%, in the full load range (80‐480 W).

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Switching Power Supplies with Ferrite Inductors in Sustainable Saturation Operation

Cited by 55 publications

References 15 publications

Method of Equivalent Currents for the Calculation of Magnetic Fields in Inductors and Magnets with Application to Electronics

Method of Equivalent Currents for the Calculation of Magnetic Fields in Inductors and Magnets with Application to Electronics

Online Estimation of the Current Ripple on a Saturating Ferrite-Core Inductor in a Boost Converter

A wide load range ZVS high voltage gain hybrid DC‐DC boost converter based on diode‐capacitor voltage multiplier circuit

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