Resonant Capacitor &lt;sc&gt;O&lt;/sc&gt;n/&lt;sc&gt;O&lt;/sc&gt;ff Control of Half-Bridge &lt;italic&gt;LLC&lt;/italic&gt; Converter for High-Efficiency Server Power Supply

Lee, Jae-Bum; Kim, Jae-Kuk; Baek, Jae-Il; Kim, Jae Hyun; Moon, Gun-Woo

doi:10.1109/tie.2016.2558481

Cited by 53 publications

(16 citation statements)

References 17 publications

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“…In many resonant circuit topologies, the inductor-inductor-capacitor (LLC) resonant converter is a more attractive circuit topology for use in high-input voltage inputs. The main advantages of LLC resonant converters [16][17][18] are low switching loss in power devices, high efficiency, and low electromagnetic interference (EMI). The main drawback of LLC resonant converters is the limited voltage gain.…”

Section: Introductionmentioning

confidence: 99%

Wide Voltage Resonant Converter Using a Variable Winding Turns Ratio

Lin

Dai

2020

Electronics

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This paper presents a inductor–inductor–capacitor (LLC) resonant converter with variable winding turns to achieve wide voltage operation (100–400 V) and realize soft switching operation over the entire load range. Resonant converters have been developed for consumer power units in computers, power servers, medical equipment, and adaptors due to the advantages of less switching loss and better circuit efficiency. The main disadvantages of the LLC resonant converter are narrow voltage range operation owing to wide switching frequency variation and limited voltage gain. For computer power supplies with hold-up time function, electric vehicle battery chargers, and for power conversion in solar panels, wide input voltage or wide output voltage operation capability is normally demanded for powered electronics. To meet these requirements, the variable winding turns are used in the presented circuit to achieve high- or low-voltage gain when Vin is at low- or high-voltage, respectively. Therefore, the wide voltage operation capability can be implemented in the presented resonant circuit. The variable winding turns are controlled by an alternating current (AC) power switch with two back-to-back metal-oxide-semiconductor field-effect transistors (MOSFETs). A 500-W prototype is implemented and test results are presented to confirm the converter performance.

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Section: Introductionmentioning

confidence: 99%

Wide Voltage Resonant Converter Using a Variable Winding Turns Ratio

Lin

Dai

2020

Electronics

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“…In the Time Domain Method of LLC-RC, the periodic resonant current, as well as the voltage waveforms, are achieved by sorting the operation modes. The power losses are higher in this technique [26] [27] [28]. Hence, there is a necessity to have an optimal design for LLC-RC.…”

Section: Introductionmentioning

confidence: 99%

An Optimal Design of LLC Resonant Converter using FireFly Algorithm based Parameter Optimization Approach

Sarath¹,

Sekar²

2019

JCMPS

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The development of power conversion technology is in constant demand due to high power efficiency and high power density. In the resonant converter, huge resonant converter topologies are available and among them, LLC converter is the most attractive one as it is capable of operating in the wide variation range of input voltage and load conditions. Apart from these advantages, LLC Resonant Converter (LLC-RC) suffers from drawbacks like power loss and voltage fluctuations. Thus, this paper intends to develop novel LLC-RC designs on the basis of the Parameter Optimization (PO) algorithm. The proposed model overcomes the major shortcoming by employing a non-conceptual model on the basis of the simulated outcome. The intelligent model is constructed under the start-up conditions with the literary outcomes achieved from the resonant current. As a novelty, the time constant of the resonant converter is optimized by Firefly algorithm (FF). The time constant is optimized on the basis of the objective model, which was obtained from the function of start-up time. The start-up time was diminished and the response speed of the output voltage was increased. Finally,

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“…Additionally, consumers have high requirements for power supply efficiency, volume, power density, and reliability [1]- [3]. Regarding the application of server and telecom power supplies, two-stage switching power supply (SPS) remains the mainstream architecture [4], [5]. In addition, two-stage SPS can also be employed in plug-in electrical vehicle (PEV) applications.…”

Section: Introductionmentioning

confidence: 99%