Analysis of LCLC DC-DC resonant converter in steady state operation

Frivaldský, Michal; Dobrucký, Branislav; Pridala, Michal

doi:10.1109/iecon.2016.7793216

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…• Increased heat losses, • Increased voltage drop in the supply system, • Decreased utilization of generator and grid, • Degradation of short-circuiting conditions in the supply system. [5,7,8].…”

Section: Measuring Set Up and Evaluated Devicesmentioning

confidence: 99%

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Research of the Negative Influence of Dimmed LED Luminaires in Context of Smart Installations

2021

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This article deals with the investigation of the negative impacts of dimmed public, industrial and office LED (light emitting diode) light installations. This approach is required due to the uncertain design of LED ballasts, while manufacturers do not implement the required PFC (power factor correction) function. Therefore, the focus is on a brief description of the principles of negative influences such as: low power factor, high inrush current and high total harmonic distortion based on direct confrontation with actual standards (IESC EN, NEMA, ENERGY STAR). Further, the behavior of LED drivers is explained under nominal load and dimmed up to critical level. Presented findings confirm issues reported by users from larger installations where LED fittings are dimmed over a certain level. The article includes recommendations for consumers and producers of LED fittings about main issues from the scientific and user points of view. Presented facts conclude on the necessity of studying the marginal operating state of LED fittings aiming at THD (total harmonic distortion), PF (real power factor) and inrush currents.

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Section: Measuring Set Up and Evaluated Devicesmentioning

confidence: 99%

“…Another article [4] operates and compares the information in and conclusions of work by R.B. Timens-Electromagnetic Interference of Equipment in Power Supply Networks [5]. This work is based on a comparison of negative impacts of CLF (fluorescents light bulbs) and LED bulbs on the "Power Distribution User Network (PDUN)".…”

Section: Introductionmentioning

confidence: 99%

Research of the Negative Influence of Dimmed LED Luminaires in Context of Smart Installations

2021

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“…Previous research on LCLC resonant converters can be reviewed as close-loop [3][4][5][6][7][8][9] and open-loop [2,10]. In [3], an extra capacitance was introduced into an LLC resonant tank to build an LCLC resonant tank, and the traditional LLC control method was applied in an LCLC resonant converter.…”

Section: Introductionmentioning

confidence: 99%

“…In [4,5], a special closed loop was designed to regulate the voltage-gain of an LCLC resonant converter. In [6], interleaved control was utilized to improve the performance of an LCLC resonant converter at the overload condition. In [7], an LCLC resonant converter control was re-designed for dual outputs.…”

Section: Introductionmentioning

confidence: 99%

PSO-Algorithm-Based Optimal Design of LCLC Resonant Converters for Space Travelling-Wave Tube Amplifiers Applications

Zhao

Wang

2019

Energies

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Due to the advantages of zero-voltage-switching (ZVS) and zero-current-switching (ZCS), LCLC resonant converters are universally applied in two-stage electronic power conditioners (EPCs) of space travelling-wave tube amplifiers (TWTAs). In two-stage EPCs, as the output voltage is regulated by the first stage, the main functions of LCLC resonant converters are to boost the input voltage, provide galvanic isolation, and maintain high efficiency. However, the total power loss of an LCLC resonant converter is very challenging because of the multiple resonant components and their mutual couplings. In order to solve this problem, in this paper, a PSO (Particle Swarm Optimization)-algorithm-based, efficiency-oriented optimal design method of an LCLC resonant converter is proposed. Based on an analysis of working principles, the total power loss (with consideration of all the power losses, including the driving loss and the conduction loss of the main switches), transformer loss, and power loss of the rectifiers is calculated. After that, the total power loss is appointed as the objective function of the PSO algorithm, where the optimal circuit parameters are derived to minimize the total power loss. After the optimal circuit parameters are obtained, an LCLC resonant converter with the desired parameters is built. Finally, the proposed PSO-algorithm-based, efficiency-oriented optimal design method is validated by an example.

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“…Given proposal is practically implemented at fourth order DC-DC resonant converter with LCCT network within modular architecture of power supply, operated at parallel-input and parallel-output configuration. It is expected that three modules are operated simultaneously, while redundancy, overloading capability, short-circuit prevention, and no-load are expected applications [32,33].…”

Section: Introductionmentioning

confidence: 99%

Control Strategy Proposal for Modular Architecture of Power Supply Utilizing LCCT Converter

et al. 2018

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Following the invention of resonant power converters, lots of new topologies with significant improvements considering increase of efficiency and power density are arising. The main differences are related to the configuration of the resonant tank structure. In this paper, LCCT topology is proposed, while main aim is focused on the application of the modular architecture of power supply (MAPS) systems. Initially, principal analysis is given which describes basic features and components selection of LCCT resonant converter. After principal analysis, the application is oriented for above mentioned modular architecture of power supply, where more than one LCCT converter operated simultaneously is considered. The main asset within the presented system investigation is the proposal for the control strategy of the modular power supply system. Instead of the requirement on the most efficient operation within the whole operational power range of MAPS, the proposal for control strategy is given, while it is expected that each module of MAPS will be loaded evenly. The control strategy is based on the digital control, whereby sequential switching of the individual power stages is autonomous based on the information’s of the actual power load. Presented solution gives improvements of the parameters where extended range of input voltage, extended range of output power, flat characteristic of efficiency, and lower ripple current and/or voltage will be required.

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Analysis of LCLC DC-DC resonant converter in steady state operation

Cited by 9 publications

References 11 publications

Research of the Negative Influence of Dimmed LED Luminaires in Context of Smart Installations

Research of the Negative Influence of Dimmed LED Luminaires in Context of Smart Installations

PSO-Algorithm-Based Optimal Design of LCLC Resonant Converters for Space Travelling-Wave Tube Amplifiers Applications

Control Strategy Proposal for Modular Architecture of Power Supply Utilizing LCCT Converter

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