LLC resonant converter with wide input voltage and load range at fixed switching frequency

Yoon, Kyung Hoon; Noh, Young-Jae; Phum, Sopeak; Meas, Saran; Jang, Sang-Ho; Kim, Eun-Soo

doi:10.1109/apec.2012.6165993

Cited by 13 publications

(3 citation statements)

References 4 publications

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“…At a typical input voltage of 390 V, the switching frequency was close to the resonance frequency, and both the magnetization current and the resonance current showed stable waveforms. This result is considered to indirectly confirm that the previously designed main resonant components were designed relatively appropriately [33][34][35].…”

Section: Circuit Simulation Results and Comparisonsupporting

confidence: 61%

“…Although the maximum output is 2 kW when the maximum output including the margin is 2.250 kW, the AC resistance R AC is as given in Equation (33). The maximum and minimum voltage gain, with respect to the input voltage, are shown in Equations ( 34) and (35), respectively. If the peak value of M for Q is obtained from Equation (30), it can be obtained from two points, as shown in Figure 13.…”

Section: Optimal Design Processmentioning

confidence: 99%

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Steady-State Analysis and Optimal Design of an LLC Resonant Converter Considering Internal Loss Resistance

2022

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In this paper, a steady-state model of an LLC resonant half-bridge converter with internal loss resistance is proposed, in order to maximize power conversion efficiency, and steady-state characteristic equations of DC voltage gain and input impedance are derived for the optimal design of the converter. First, to confirm the validity of the steady-state characteristic equation and the optimal design process, a prototype converter with a maximum output of 2 kW was designed. Through comparison of simulation, calculation, and experimental results obtained from the prototype test, it is shown that the calculation results proposed in this paper were closer to the experimental results than the calculation results obtained under the lossless condition. In addition, the relationship between the switching frequency and the load current of the prototype was compared, in order to determine the operating range of the switching frequency, which is important in the converter design stage. In this case, it was confirmed that the calculated value reflecting the internal loss showed a close result. In conclusion, we confirm the usefulness of the analysis results reflecting the internal loss resistance proposed in this paper and the optimal design process.

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Section: Circuit Simulation Results and Comparisonsupporting

confidence: 61%

Section: Optimal Design Processmentioning

confidence: 99%

Steady-State Analysis and Optimal Design of an LLC Resonant Converter Considering Internal Loss Resistance

2022

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“…and demand basis operation are some of the advantageous features that would make modular converters an attractive option for marine electrical systems. [20][21][22][23][24][25][26][27][28][29][30][31][32]. In SRC the load is connected in series with resonant tank, while in PRC, the load is connected across the resonant tank.…”

Section: D) Device Switching Lossesmentioning

confidence: 99%

Design, analysis and development of tank-less, non-resonant and low-loss zero current switching inverter

Moreddy¹

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A Reconfigurable Modular Switched Capacitor Structure for High Efficiency Over a Wide Input Voltage Range

Peng

Rice

2023

2023 IEEE Applied Power Electronics Conference and Exposition (APEC)

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LLC resonant converter with wide input voltage and load range at fixed switching frequency

Cited by 13 publications

References 4 publications

Steady-State Analysis and Optimal Design of an LLC Resonant Converter Considering Internal Loss Resistance

Steady-State Analysis and Optimal Design of an LLC Resonant Converter Considering Internal Loss Resistance

Design, analysis and development of tank-less, non-resonant and low-loss zero current switching inverter

A Reconfigurable Modular Switched Capacitor Structure for High Efficiency Over a Wide Input Voltage Range

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