Analysis and Design of a High-Frequency Isolated Full-Bridge ZVT CLL Resonant DC–DC Converter

Patil, Uday; Harischandrappa, Nagendrappa

doi:10.1109/tia.2019.2926290

Cited by 13 publications

(7 citation statements)

References 30 publications

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“…Ungapped toroidal inductors (including cores with distributed air gap) are present in a wide variety of industrial applications. Among those applications, where inductors perform a major role, are filters [3], [4], [7], DC-link inductors in current source inverters [5] and resonant tanks [8]. As can be observed, particularly lowpermeability toroidal inductors are implemented in power applications (> 1 kW).…”

Section: Introductionmentioning

confidence: 95%

Analytical Modeling of High-Frequency Winding Loss in Round-Wire Toroidal Inductors

Elizondo

Barrios

Ursúa

et al. 2023

IEEE Trans. Ind. Electron.

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Toroidal inductors are present in many different industrial applications, thus, still receive researchers' attention. AC winding loss in these inductors have become a major issue in the design process, since switching frequency is being continuously increased in power electronic converters. Finite element analysis software or analytical models such as Dowell's are the main existing alternatives for their calculation. However, the first one employs too much time if different designs are to be evaluated and the second one lacks accuracy when applied to toroidal inductor windings. Looking for an alternative that overcomes these drawbacks, this paper proposes an accurate, easy-to-use analytical model, specifically formulated for calculating high-frequency winding loss in round-wire toroidal inductors.

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Section: Introductionmentioning

confidence: 95%

Analytical Modeling of High-Frequency Winding Loss in Round-Wire Toroidal Inductors

Elizondo

Barrios

Ursúa

et al. 2023

IEEE Trans. Ind. Electron.

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“…Recently, renewable energy sources have been regarded as a solution to the environmental issues [1], [2]. Since, depletable energy sources mostly have low and fluctuating output voltage, using a dc-dc step-up power converter is indispensable to both level up and to regulate their output voltages [3], [4]. Till now, various converters such as high step-up, high voltage, interleaved, and resonant converters have been introduced to increase voltage gain, output voltage, and output power of the dc-dc converters.…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

et al. 2022

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A current-fed LLC resonant converter is proposed for high-voltage and high-power applications. Here, a two-phase interleaved structure is used in the input stage under the continuous conduction mode (CCM) to effectively reduce the input current and output voltage ripple values and the input filter and the output capacitors volumes. Due to the expandable structure and high voltage gain, the proposed configuration is suitable for high voltage applications since low voltage stresses are applied across its components. In fact, voltage stresses across the power semiconductors, i.e., MOSFETs and output diodes, along with the output capacitors, are almost one-third of the output voltage in the implemented three-stage configuration of the proposed converter. Here, the switching frequency is chosen close to, but less than, the converter series resonant frequency to reduce its different components' current stresses and perform softswitching operation for all power devices under wide input voltage and output power variations. Therefore, conduction and switching losses, and EMI noises are effectively reduced. Consequently, efficiency is improved and high-frequency operation is possible, which reduces the volume of passive components to achieve high-power density. The given topology is thoroughly analyzed mathematically. Also, a 1 kW prototype converter has been implemented to validate the given simulations and analyses. Here, wide input voltage (100 V-200 V) and output power (100 W-1000 W) variations are applied, and an asymmetric pulse width modulation (APWM) technique is used at 143 kHz switching frequency to regulate the output voltage at 1 kV. The obtained maximum efficiency value is 95.3%.INDEX TERMS Asymmetric pulse width modulation (APWM), current-fed converter, interleaved technique, LLC resonant converter, multi-winding transformer.

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“…However, these topologies involve additional switches which operate with hard switching increasing switching losses, cost, and complexity of the circuit. The modified PWM gating scheme (MGS) [36][37][38][39] applied to full-bridge DC-DC resonant converter offers ZVS to all the main switches for changes in load with a low input voltage, and only one switch loses ZVS with a high input voltage as compared to two switches with PGS [22][23][24]. Hence, MGS results in better efficiency than PGS without any additional cost.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, MGS results in better efficiency than PGS without any additional cost. In [39], the performance of the CLL resonant converter working with minimum input voltage and controlled using MGS is given. The performance of the converter with a maximum input voltage without an auxiliary zero‐voltage transition (ZVT) circuit is not given in [39].…”

Section: Introductionmentioning

confidence: 99%

“…In [39], the performance of the CLL resonant converter working with minimum input voltage and controlled using MGS is given. The performance of the converter with a maximum input voltage without an auxiliary zero‐voltage transition (ZVT) circuit is not given in [39]. Therefore, in this study, the operation of the CLL resonant converter with MGS when the input voltage is maximum is described with the help of equivalent circuits in detail.…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of high‐frequency CLL resonant DC–DC converter operated with phase‐shift and modified PWM gating scheme: analysis, design and implementation

Patil

Harischandrappa

2020

IET Power Electronics

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Normal phase-shift and modified pulse-width modulation gating schemes are proposed for a full bridge highfrequency capacitor-inductor-inductor (CLL) resonant DC-DC converter, and its performance is analysed in this study. Detailed modelling and the steady-state analysis of the converter are performed by using the fundamental harmonic approximation approach. Various modes of the converter operation with both the gating schemes are described and examined in detail. Zerovoltage switching of all the main switches is achieved by designing the resonant converter to operate in the above resonance mode. The optimum design of the converter is illustrated with the help of a flowchart and design curves. PSIM simulation is carried out and the experimental prototype is built to substantiate theoretical performance predictions. The simulation and experimental results are presented and compared.

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Analysis and Design of a High-Frequency Isolated Full-Bridge ZVT CLL Resonant DC–DC Converter

Cited by 13 publications

References 30 publications

Analytical Modeling of High-Frequency Winding Loss in Round-Wire Toroidal Inductors

Analytical Modeling of High-Frequency Winding Loss in Round-Wire Toroidal Inductors

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

Performance evaluation of high‐frequency CLL resonant DC–DC converter operated with phase‐shift and modified PWM gating scheme: analysis, design and implementation

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