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A novel topology of half bridge three-level full bridge bidirectional DC-DC converter is proposed. The configuration and operational principles of the novel converters with the dual-phase-shifting control were analyzed. The ZVS soft-switching range of the left three-level half bridge and the right H-bridge under different voltage conversion ratio were discussed. In order to improve the whole system...
As for high power plasma power supply, due to high efficiency and flexibility, multi-channel interleaved multi-stage paralleled Buck DC-DC Converter becomes the first choice. In the paper, two-channel interleaved two- stage paralleled Buck DC-DC Converter powered by three-phase AC power supply is selected as research subject, dedicated for the use of plasma cutting machine of 2×45kW, and the passivity-based...
This paper presents the loss performance analysis of an isolated power supply that is designed for ultra-fast tracking converters. The results of the analysis provide insights into the operation of the proposed power supply, how each physical component contributes to the total loss, and how its efficiency may be further improved.
This paper briefly describes the concept of bi-directional DC/DC converter, it introduces the bi-directional DC/DC converter category, control technology and practical application. Bi-directional DC/DC converter is a vital component of the power electronic converter, in the case of two-way need energy flow, bi-directional DC/DC converter has important application value. As the development of science...
The interleaving technique is necessary for multiphase LLC resonant converters in high output current high power level applications. But the conventional frequency-controlled LLC converters will lose current sharing if all the phases are operating at the same switching frequency. In this paper, a two-phase interleaved LLC-Regulated DCX (LLC-RDCX) with parallel PWM output regulation is presented to...
This paper addresses a dual active bridge isolated DC-DC convertor into a cascaded battery energy storage system(BESS) with an additional benefit of medium frequency galvanic isolation. The topology, named as multi-level cascaded medium frequency isolated cascaded power conversion system is presented in the beginning of this paper to improve the performance of cascaded BESS. Its working principles,...
This paper presents an analysis and comparison of isolated topologies for bidirectional fuel cell systems. The analyzed topologies are the dual active bridge (DAB) and the isolated full bridge boost converter (IFBBC). The analysis is performed based on the component stress factor (CSF). Results highlight that the DAB has lower CSF than the IFBBC for narrow converter operating points. On the other...
A novel high step-up DC-DC converter is proposed in this paper. In this paper, interleaved inductors are utilized to combine with switched capacitors to generate a simple circuit structure. This topology aims to reduce current stress in low-voltage side further, decrease voltage stress in high-voltage side, and to achieve output voltage regulation with a wide range input. The operating principles...
This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two equivalent voltage sources. The two equivalent voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output voltage to realize high...
This paper presents a novel cell voltage equalization system, which employs cell management modules that can be attached with individual cells in a battery bank. A unique resonant bi-directional DC-DC converter topology is employed to facilitate bi-directional energy transfer between cells and the battery bank. A mathematical analysis of the bi-directional resonant DC-DC converter system is presented...
In this paper, a simple control method is presented to stabilize the nonlinear dynamic behavior of LLC resonance full-bridge DC-DC converter under voltage mode control based on the conventional delay time feedback, resonant parametric perturbation and self-stable control methods. First, the mathematical model of LLC resonance full-bridge DC-DC converter under voltage mode control are built. Second,...
In renewable energy applications power conversion efficiency is major concern. This is especially true for grid-tie energy storage systems based on bidirectional dc-dc and dc-ac converters where power flows through these system components. Latest developments in power semiconductors technology significantly reduced switching and conduction losses in dc-dc and dc-ac converters allowing efficiencies...
The European Spallation Source is a planned research facility in Lund-Sweden for scientific research using particle accelerators. In the facility protons will be accelerated in a pulsed pattern and collide with a heavy metal target. Due to the impact of the protons intense pulses of neutrons are emitted. These neutrons are led to experimental stations, where research on materials is executed. A total...
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