Design of an LLC Resonant Converter for Driving Multiple LED Lights Using Current Balancing of Capacitor  and Transformer

Han, Jae-Hyun; Lim, Young‐Cheol

doi:10.3390/en8032125

Cited by 16 publications

(12 citation statements)

References 18 publications

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“…According to Equations (10) and (11), the three resonant points should be set as this inequation, so that the gain curve is consistent with Figure 4. Since the ZVS region is from f s1 to f s0 , the serial converter obtains widely adjustable gain range within this scope.…”

Section: Selection Constraints Of the Serial Topologymentioning

confidence: 88%

“…Famous for the advantages of simple structure, wide soft-switching range, outstanding voltage regulation performance and high efficiency, the LLC converter is broadly applied in diverse applications, such as battery chargers, renewable and distributed energy generation, and switched mode power supplies. At present, on the basis of the classical LLC topology, considerable research has been implemented concentrating on the optimal parameter design [6][7][8], advanced control strategy [9,10], current balancing [11], bidirectional power transmission [12,13], high-frequency analysis [14,15], and over-current protection [16,17].…”

Section: Introductionmentioning

confidence: 99%

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A Study of Two Multi-Element Resonant DC-DC Topologies with Loss Distribution Analyses

et al. 2017

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Abstract:In this paper, two multi-element resonant DC-DC converters are analyzed in detail. Since their resonant tanks have multiple resonant components, the converters display different resonant characteristics within different operating frequency ranges. Through appropriate design, both of the two proposed converters successfully lower the conversion losses and, meanwhile, broaden the voltage gain ranges as well: one converter is able to take full usage of the third order harmonic to deliver the active power, and thus the effective utilization rate of the resonant current is elevated; while the another minimizes the entire switching losses for power switching devices by restricting the input impedance angle of the resonant tank. Besides, the loss distribution is analyzed for the purpose of guiding the component design. In the end, two 500 W prototypes are fabricated to test the theoretical analyses. The results demonstrate that the two proposed converters can achieve wide voltage gain with the small frequency deviation, which noticeably contributes to highly efficient conversion. Their peak efficiencies are measured as 95.4% and 95.3%, respectively.

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Section: Selection Constraints Of the Serial Topologymentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

A Study of Two Multi-Element Resonant DC-DC Topologies with Loss Distribution Analyses

et al. 2017

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“…In terms of lighting, the total global power consumption in this field is roughly 2.100 trillion kWh per year (approximately15% of the global power consumption) which is equivalent to the emission of 1.7 billion tons of carbon oxide [2] and these values are increasing at a rate of 3-6% per year [3].…”

Section: Introductionmentioning

confidence: 99%

“…The standardization boards should specify minimum light levels for basic activities (walking or driving) and conservative top appropriate values for these areas [2]. This is important to avoid rebound effects: to increase illumination levels as lighting becomes "cheaper" [6].…”

mentioning

confidence: 99%

Power Quality and Energy Efficiency in the Pre-Evaluation of an Outdoor Lighting Renewal with Light-Emitting Diode Technology: Experimental Study and Amortization Analysis

2017

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Abstract:In this work, a practical methodology is proposed to analyze, before undertaking a large investment, an outdoor lighting installation renewal with light-emitting diode (LED) luminaires. The main problems found in many of the luminaires tested are associated with inrush peak currents in cold start (which may cause ignition problems with random shutdowns), the harmonic distortions caused by their AC/DC associated electronic nature driver, and their working and efficiency dependency on the ambient temperature. All these issues have been tested in the context of a large metal halide (MH) to LED luminaires lighting point renewal where six commercial LED projectors have been analyzed with the above considerations. This research has isolated a single-phase circuit powered with constant stabilized 230 V AC voltage source in a real public lighting installation. All of them have been sequentially installed and their main electrical and power-quality parameters measured and recorded. The results indicate that each luminaire option will influence the expected long-term reliability (>50.000 h or more as expressed by the U.S. Department of Energy) of the lighting installation (in the case poor power quality is generated on the grid). The economic analysis made to estimate the profitability of the investment may be severely affected by the difference between the declared and the real consumption values in which they perform in our specific installation.

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“…In the past, the LLC resonant converters were largely employed as an energy-efficient power supply for consumer electronics, such as large-screen TV sets and home appliances [1,3]. Recently, the LLC resonant converters find ever increasing applications to more sophisticated and bigger energy conversion systems, primarily due to the high efficiency of the converter.…”

Section: Introductionmentioning

confidence: 99%

Current Mode Control for LLC Series Resonant DC-to-DC Converters

Jang¹,

Pidaparthy

Choi

2015

Energies

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Conventional voltage mode control only offers limited performance for LLC series resonant DC-to-DC converters experiencing wide variations in operational conditions. When the existing voltage mode control is employed, the closed-loop performance of the converter is directly affected by unavoidable changes in power stage dynamics. Thus, a specific control design optimized at one particular operating point could become unacceptable when the operational condition is varied. This paper presents a new current mode control scheme which could consistently provide good closed-loop performance for LLC resonant converters for the entire operational range. The proposed control scheme employs an additional feedback from the current of the resonant tank network to overcome the limitation of the existing voltage mode control. The superiority of the proposed current mode control over the conventional voltage mode control is verified using an experimental 150 W LLC series resonant DC-to-DC converter.

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Design of an LLC Resonant Converter for Driving Multiple LED Lights Using Current Balancing of Capacitor and Transformer

Cited by 16 publications

References 18 publications

A Study of Two Multi-Element Resonant DC-DC Topologies with Loss Distribution Analyses

A Study of Two Multi-Element Resonant DC-DC Topologies with Loss Distribution Analyses

Power Quality and Energy Efficiency in the Pre-Evaluation of an Outdoor Lighting Renewal with Light-Emitting Diode Technology: Experimental Study and Amortization Analysis

Current Mode Control for LLC Series Resonant DC-to-DC Converters

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