High-Speed (MHz) Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer

Kotte, Hari Babu; Ambatipudi, Radhika; Bertilsson, Kent

doi:10.1109/tpel.2012.2208123

Cited by 30 publications

(6 citation statements)

References 22 publications

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“…The simulations are carried out using FEMM, a free software for solving 2D problems using finite element analysis (FEA) [35], and the code developed for this work has been made available [36]. The inductance target of 1 µH is set as reasonable values for the application [3], [11], [19], [21]. For the coupling capacitance, there is no consensus in the literature on the maximum allowable value.…”

Section: Simulation Resultsmentioning

confidence: 99%

High-Voltage Insulation Design of Coreless, Planar PCB Transformers for Multi-MHz Power Supplies

Spro

Mauseth

Peftitsis

2021

IEEE Trans. Power Electron.

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This paper investigates the insulation design for printed, planar, coreless, and high-frequency transformers with high isolation-voltage. By using finite element analysis on 2D axial-symmetry, the transformer circuit parameters and electric field distribution are modelled and estimated. Several transformers are designed for an operating frequency of 6.78 MHz. The high frequency, coreless design allows for using thicker insulation material while ensuring a high transformer efficiency. The inclusion of the coupling capacitance in the design optimisation results in several design solutions with the same figure of merit, but with different footprint and isolation voltages. Moreover, high electric fields are identified around the sharp edges of the PCB windings. Finally, the electrical and isolation performance is verified experimentally. The measured electrical properties are close to the simulated values, validating the chosen model. Breakdown tests demonstrate the feasibility of isolation voltage levels up to several tens of kilovolts. The majority of breakdowns occurs at the outer edge of the PCB winding that was identified as a high-field area. Additionally, a concept for grading the electric field of PCB windings is also proposed. Based on the results, the design aspects are discussed in detail for planar, high-frequency isolation transformers with medium-voltage isolation level.

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Section: Simulation Resultsmentioning

confidence: 99%

High-Voltage Insulation Design of Coreless, Planar PCB Transformers for Multi-MHz Power Supplies

Spro

Mauseth

Peftitsis

2021

IEEE Trans. Power Electron.

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“…In order to increase the switching frequency and, at the same time, to reduce the shortcomings of the SMPS, resonance conversion techniques are used [7], [8], [9]. A schematic of the resonant converters showing different resonant tank networks (RTNs) is illustrated in Fig.…”

Section: Power Supply Topologiesmentioning

confidence: 99%

Resonant converters for electric equipment power supply

Outeiro

Buja

Carvalho

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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The paper deals with the use of resonant converters for the power supply of electric equipment. After exploring the advantages of using the resonant conversion, an analysis of the three main resonant topologies, namely i) series-resonant, ii) parallel-resonant, and iii) a combination of them, is carried out and a series resonant converter is implemented. Considerations on the design of the resonant converter as well as on the selection of their components, including the HF transformer, are presented. Performance of the implemented series resonant converter is investigated in terms of dynamic behavior through experimental results.

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“…The core and copper losses of the conventional wire-wound transformer are increased due to the skin and proximity effects under high-frequency conditions. In order to eliminate the core losses, a coreless PCB transformer has been getting attention for high-frequency applications, providing isolation and power transfer [22], [23], [24], [25], [26], [27]. Furthermore, the planar PCB transformer reduces the volume and vertical dimension of the power electronic circuits, which increases the power density.…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling and Design of 27.12 MHz Single-Switch DC–DC Converter With PCB Transformer

Kwon

Lee

et al. 2023

IEEE Access

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This paper proposes analytical modeling and design of a 27.12 MHz single-switch dc-dc converter with galvanic isolation using a PCB transformer. The ODE-based analytical approach provides a more accurate circuit design by considering the high-order harmonics and non-ideal components such as the diode capacitances. The proposed dimensionless mathematical model simplifies the design of the desired circuit model and requires less tuning procedure. In addition, the effective analytical model offers the design curves to obtain the optimized circuit parameters at any duty ratio. Meanwhile, the multilayer planar PCB transformer is designed to achieve the isolation and high power density for the high-frequency dc-dc converter. Based on Neumann's formula, the analytical model of the PCB transformer is proposed to calculate the inductances for the spiral structure accurately in the high-frequency conditions. As a result, the computational burden for calculating the coil inductances is alleviated using the proposed method. The simulation and experimental results using a 3W converter prototype verify the effectiveness and feasibility of the analytical modeling and design of the proposed converter. Analytical model, high-frequency, planar PCB transformer, single-switch DC-DC converter, soft-switching. INDEX TERMS

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High-Speed (MHz) Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer

Cited by 30 publications

References 22 publications

High-Voltage Insulation Design of Coreless, Planar PCB Transformers for Multi-MHz Power Supplies

High-Voltage Insulation Design of Coreless, Planar PCB Transformers for Multi-MHz Power Supplies

Resonant converters for electric equipment power supply

Analytical Modeling and Design of 27.12 MHz Single-Switch DC–DC Converter With PCB Transformer

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