Journal ArticleDOI
Towards a 99% Efficient Three-Phase Buck-Type PFC Rectifier for 400-V DC Distribution Systems
TLDR
In this paper, an efficiency-optimized, 98.8% efficient, 5-kW three-phase buck-type PFC rectifier with 400-V output is presented.Abstract:
In telecom applications, the vision for a total power conversion efficiency from the mains to the output of point-of-load (PoL) converters of 95% demands optimization of every conversion step, i.e., the power factor correction (PFC) rectifier front-end should show an outstanding efficiency in the range of 99%. For recently discussed 400-V dc distribution bus voltages, a buck-type PFC rectifier is a logical solution. In this paper, an efficiency-optimized, 98.8% efficient, 5-kW three-phase buck-type PFC rectifier with 400-V output is presented. Methods for calculating losses of all components are described and are used to optimize the converter design for efficiency at full load. Special attention is paid to semiconductor losses, which are shown to be dominant, with the parasitic device capacitance losses being a significant component. The calculation of these parasitic capacitance losses is treated in detail, and the charge-balance approach used is verified. A prototype of the proposed rectifier is constructed which verifies the accuracy of the models used for loss calculation and optimization.read more
Citations
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Journal ArticleDOI
Overview of Dual-Active-Bridge Isolated Bidirectional DC–DC Converter for High-Frequency-Link Power-Conversion System
TL;DR: In this paper, the dual-active-bridge (DAB) isolated bidirectional dc-dc converter (IBDC) serves as the core circuit of high frequency-link (HFL) power conversion systems.
Journal ArticleDOI
The Essence of Three-Phase PFC Rectifier Systems—Part II
TL;DR: In this article, three-phase power factor correction (PFC) rectifier topologies with sinusoidal input currents and controlled output voltage are derived from known single-phase PFC rectifier systems and/or passive 3-phase diode rectifiers, and their functionality and basic control concepts are briefly described.
Journal ArticleDOI
Extreme Fast Charging of Electric Vehicles: A Technology Overview
TL;DR: The benefits of using the solid-state transformers in the XFC stations to replace the conventional line-frequency transformers and a comprehensive review of the medium-voltage SST designs for the X FC application are considered.
Journal ArticleDOI
Intergrid: A Future Electronic Energy Network?
TL;DR: In this paper, a hierarchical dynamic decoupling of generation, distribution, and consumption by using bidirectional electronic power converters as energy control centers is discussed. But, the authors do not consider the potential for the use of new power electronics technologies in electrical energy generation and consumption.
Journal ArticleDOI
High-Efficiency Isolated Bidirectional AC–DC Converter for a DC Distribution System
TL;DR: In this article, a high-efficiency isolated bidirectional ac-dc converter is proposed for a 380-V dc power distribution system to control the power flows and to improve its power conversion efficiency.
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