scholarly journals Design Considerations of Series-Connected Devices Based LLC Converter

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 264 ◽  
Author(s):  
Dongkwan Yoon ◽  
Sungmin Lee ◽  
Younghoon Cho
Keyword(s):  
High Voltage ◽  
Resonant Converter ◽  
Fixed Frequency ◽  
Solid State Transformer ◽  
Passive Element ◽  
Voltage Balancing ◽  
Llc Resonant Converter ◽  
Converter Design ◽  
The Stability ◽  
High Voltage System

This paper describes the design of a Series-Connected Device based on a fixed–frequency LLC resonant converter (SCDLLC). Isolation of the dc-dc converter like the LLC resonant converter is used for the stability of the high voltage system such as a solid-state-transformer (SST). The series-connected devices driving method is one of the methods applicable to a high voltage system. When driving series-connected devices, an auxiliary circuit for voltage balancing between series-connected devices is required, which can be simply implemented using a passive element. In this paper, LLC converter design with balancing circuits configured in parallel with a device is provided, and both the simulations and experiments were performed.

scholarly journals Impedance Modeling and Stability Analysis for Cascade System of Three-Phase PWM Rectifier and LLC Resonant Converter

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3050 ◽  
Author(s):  
Rutian Wang ◽  
Yuyang Wu ◽  
Guoqing He ◽  
Ying Lv ◽  
Jiaxing Du ◽  
...  
Keyword(s):  
Resonant Converter ◽  
Pwm Rectifier ◽  
Output Impedance ◽  
Cascade System ◽  
Signal Model ◽  
Impedance Model ◽  
Small Signal Model ◽  
Three Phase ◽  
Llc Resonant Converter ◽  
The Stability

In this paper; the impedance model of PWM rectifier and LLC resonant converter are deduced, and the stability analysis of cascade system is studied. The principle of three-phase PWM rectifier is introduced; and the small signal model in d-q coordinate system is deduced. The expression of dc side output impedance model for PWM rectifier is derived. The LLC resonant converter is operated in a fixed-frequency state, and the LLC resonant converter is modeled as a small signal model. On this basis, the input impedance model expression of the LLC resonant converter is derived. According to the impedance stability criterion, it can seen that the amplitude of input impedance is greater than the amplitude of output impedance in a certain frequency domain. In addition, the Nyquist curve is not around the point (−1,0), which can judge that the cascade system is stable. In simulation software, a cascade system simulation is built and corresponding simulation curves are obtained, which verifies the stability of the cascade 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

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

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244595
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

scholarly journals EMI Suppression With Distributed $LLC$ Resonant Converter for High-Voltage VR-on-Package

2020 ◽  
Vol 10 (2) ◽  
pp. 263-271
Author(s):  
Kan Xu ◽  
Boris Vaisband ◽  
Gregory Sizikov ◽  
Xin Li ◽  
Eby G. Friedman
Keyword(s):  
High Voltage ◽  
Resonant Converter ◽  
Llc Resonant Converter
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