scholarly journals Design of Power Supply for Green PC using Low Voltage High Current LLC Resonant Converter

2014 ◽  
Vol 19 (3) ◽  
pp. 211-219
Author(s):  
Young-Do Yoo ◽  
In-Dong Kim ◽  
Eui-Cheol Nho ◽  
Myung-Hyo Ryu ◽  
Ju-Won Baek
Keyword(s):  
Power Supply ◽  
Low Voltage ◽  
Resonant Converter ◽  
High Current ◽  
Llc Resonant Converter

scholarly journals Design of a LLC Resonant Converter for Powering a PEM Electrolyzer

2021 ◽  
Vol 19 ◽  
pp. 452-458
Author(s):  
G. Vitale ◽  
◽  
F. Castaldi ◽  
D. Guilbert
Keyword(s):  
Proton Exchange Membrane ◽  
Low Voltage ◽  
Proton Exchange ◽  
Resonant Converter ◽  
High Current ◽  
Design Constraints ◽  
Voltage Ripple ◽  
Llc Resonant Converter ◽  
Pem Electrolyzer ◽  
Exchange Membrane

This paper proposes the design of a LLC resonant converter to supply a proton exchange membrane (PEM) electrolyzer. The PEM requires a low voltage with high current, a reduced output voltage ripple, and an overdamped dynamic behavior of the converter to avoid voltage overshoots. The designed converter allows satisfying the design constraints, minimizing switching and reverse recovery losses; the efficiency is influenced mainly by the output rectifier's conduction losses.

An 8kW LLC resonant converter in plasma power supply based on SiC power devices for efficiency improvement

Circuit World ◽  
2019 ◽  
Vol 45 (4) ◽  
pp. 181-188
Author(s):  
Zhenmin Wang ◽  
Wenyan Fan ◽  
Fangxiang Xie ◽  
Chunxian Ye
Keyword(s):  
Silicon Carbide ◽  
Power Supply ◽  
High Frequency ◽  
Experimental Results ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Plasma Power ◽  
Power Devices ◽  
Content Type ◽  
Llc Resonant Converter

Purpose This paper aims to present an 8 kW LLC resonant converter designed for plasma power supply with higher efficiency and lighter structure. It presents how to solve the problems of large volume and weight, low performance and low efficiency of traditional plasma power supply. Design/methodology/approach At present, conventional silicon (Si) power devices’ switching performance is close to the theoretical limit determined by its material properties; the next-generation silicon carbide (SiC) power devices with outstanding advantages can be used to optimal design. This 8 kW LLC resonant converter prototype with silicon carbide (SiC) power devices with a modulated switching frequency ranges from 100  to 400 kHz. Findings The experimental results show that the topology, switching loss, rectifier loss, transformer loss and drive circuit of the full-bridge LLC silicon carbide (SiC) plasma power supply can be optimized. Research limitations/implications Due to the selected research object (plasma power supply), this study may have limited universality. The authors encourage the study of high frequency resonant converters for other applications such as argon arc welding. Practical implications This study provides a practical application for users to improve the quality of plasma welding. Originality/value The experimental results show that the full-bridge LLC silicon carbide (SiC) plasma power supply is preferred in operation under conditions of high frequency and high voltage. And its efficiency can reach 98%, making it lighter, more compact and more efficient than previous designs.

scholarly journals Application of the Lyapunov Algorithm to Optimize the Control Strategy of Low-Voltage and High-Current Synchronous DC Generator Systems

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 871 ◽  
Author(s):  
Jinfeng Liu ◽  
Xiaohai Tan ◽  
Xudong Wang ◽  
Herbert Ho-Ching IU
Keyword(s):  
Power Supply ◽  
Low Voltage ◽  
Definite Function ◽  
High Current ◽  
Generation System ◽  
Control Variables ◽  
Loop Control ◽  
Decoupling Method ◽  
Negative Definite Function ◽  
Current Sharing

In the present study, a novel multiple three-phase low-voltage and high-current permanent magnet synchronous generation system is proposed, which has only half-turn coils per phase. The proposed system is composed of a generator and two confluence plates with 108 rectifier modules. The output can reach up to 10,000 A continuous DC power supply, which is suitable for the outdoors and non-commercial power supply. The application of the Lyapunov algorithm in the synchronous rectification control was optimized. A current sharing loop control was added to the closed-loop control to ensure a stable output voltage and the output current sharing of each rectifier module. Since the two control variables solved by the Lyapunov algorithm were coupled and the negative definite function of the Lyapunov algorithm could not be guaranteed in this system, a simple decoupling method was used to decouple the control variables. Compared to the conventional control, the proposed strategy highly improved the dynamic performance of the system. The effectiveness of the proposed strategy was verified by the simulation. The 5 V/10,000 A hardware experiment platform was built, which proved the feasibility and validity of the proposed strategy for a high-power generation system.

scholarly journals High voltage DC power supply with power factor correction based on LLC resonant converter

PLoS ONE ◽  
2020 ◽  
Vol 15 (9) ◽  
pp. e0239008 ◽  
Author(s):  
Muhammad Abid ◽  
Fiaz Ahmad ◽  
Farman Ullah ◽  
Usman Habib ◽  
Saeed Nawaz ◽  
...  
Keyword(s):  
High Voltage ◽  
Power Factor ◽  
Power Supply ◽  
Power Factor Correction ◽  
Resonant Converter ◽  
Dc Power ◽  
Llc Resonant Converter ◽  
Dc Power Supply

Development of a Power Supply for the Food Processing Device, Using High Pressure due to Evaporation of Aluminum Wire by Discharging High Current

2013 ◽  
Vol 767 ◽  
pp. 244-249 ◽  
Author(s):  
Soichiro Hanashiro ◽  
Katsuya Higa ◽  
Takumi Matsui ◽  
Ryo Matsubara ◽  
Osamu Higa ◽  
...  
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Power Supply ◽  
Food Processing ◽  
Low Voltage ◽  
High Current ◽  
Aluminum Wire ◽  
Instantaneous Discharge ◽  
Current Flows ◽  
Processing Device

We have developed the food processing device which uses underwater shock waves generated by gap discharging and electrical sparking. This method is dangerous due to the fact that it requires a very high voltage. Thus, we have focused on evaporation of aluminum wires occurred by the instantaneous high current and low voltage from a charged capacitor. When instantaneous high current flows through the aluminum wire is anchored between electrodes, a shock wave is generated by the evaporation of the aluminum wire. In this research, we have developed a power supply module for the food processing device using high pressure of shock wave due to evaporation of aluminum wire by instantaneous discharge of high current. In the present stage, the evaporation of aluminum wire can generate 70% of pressure compared to the gap discharge, and as for the electric power, it reached 22.5% of the gap discharge. It has been understood that the number of the aluminum wires are important to obtain a high pressure, when the charged capacitor discharged the charge. We found that evaporation of aluminum wire can generate high pressure with low voltage, which is more effective than the gap discharging in terms of safety.

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