Proceedings ArticleDOI
Design Considerations for MHz PCB Winding Magnetic Components
TLDR
In this article, the authors proposed a further arrangement of PCB windings to minimize the PCB wire losses, where the magnetic circuit is analogous to electrical circuit, and the magnetic core structure shape the footprint of the PCB winding.Abstract:
High frequency PCB windings magnetic is one of the key components in high power density and high efficiency MHz power converter. High frequency PCB windings magnetic losses are the main limitation for the whole converter efficiency and power density, while the PCB windings losses are the main part of the magnetic losses. Currently, the Dowell’s model is used for the layout of PCB windings. However, the Dowell’s model has its restrictions, namely, magnetic field is assumed to be distributed evenly in one direction. But the magnetic field around the windings are three-dimensional and unevenly. Therefore, further arrangement of PCB windings is proposed to minimize the PCB windings losses. Besides, the magnetic circuit is analogous to electrical circuit, and the magnetic core structure shape the footprint of the PCB winding, so different magnetic core structure can be proposed for the trade-off design among the high power density, high efficiency, and low temperature stress. Therefore, both PCB winding layout and magnetic core structure design are important for the optimization of high frequency magnetic components.read more
Citations
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Proceedings ArticleDOI
Design Principles and Optimization Considerations of a High Frequency Transformer in GaN Based 1 MHz 2.8 kW LLC Resonant Converter with over 99% Efficiency
TL;DR: In this paper, the design principles and optimization considerations for the transformer in MHz LLC converter are presented, and an accurate test-based method for core loss and copper loss estimation is proposed.
Journal ArticleDOI
Two-Dimensional Winding Loss Analytical Model for High-Frequency Multilayer Air-Core Planar Inductor
TL;DR: In this paper , an improved two-dimensional analytical winding loss model for multilayered air-cored inductors with a single-turn per layer is proposed based on the fundamental electromagnetic field solution incorporating the 2-D boundary values and the edge effect in its formulation.
Patent
Optimized development of electro-mechanical devices
TL;DR: In this paper, a method for producing a winding assembly for an electro-mechanical device, wherein the winding assembly comprises a circuit board with conductor tracks, was proposed, and the circuit board was optimized depending on at least one of eddy current losses, hysteresis losses, aerodynamical losses and mechanical losses.
References
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Journal ArticleDOI
Effects of eddy currents in transformer windings
TL;DR: In this article, the effect of eddy currents on transformer windings is considered and a method is derived for calculating the variation of winding resistance and leakage inductance with frequency for transformers with single-layer, multilayer and sectionalised windings.
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High-Frequency Magnetic Components
TL;DR: In this paper, the authors present a complete study of the fundamental concepts in magnetic theory, including the skin effect and proximity effect, for high-frequency applications including switching-mode power supplies (SMPS) and resonant circuits.
Journal ArticleDOI
High-Efficiency High-Power-Density LLC Converter With an Integrated Planar Matrix Transformer for High-Output Current Applications
Chao Fei,Fred C. Lee,Qiang Li +2 more
TL;DR: A novel matrix transformer structure is proposed to integrate four elemental transformers into one magnetic core with simple four-layer print circuit board windings implementation and further reduced core loss by pushing switching frequency up to megahertz with GaN devices.
Book
Transformers And Inductors For Power Electronics: Theory, Design And Applications
TL;DR: The theory and practice of inductors and transformers employed to filter currents, store electromagnetic energy, provide physical isolation between circuits, and perform stepping up and down of DC and AC voltages is described in this paper.
Journal ArticleDOI
Overview of Planar Magnetic Technology—Fundamental Properties
TL;DR: The major advantages and disadvantages in the use of planar magnetics for high-frequency power converters are covered in this paper, and a detailed survey of winding conduction loss, leakage inductance, and winding capacitance for planar magnetic technologies is presented.