Parameter Design of High Power LLC Resonant Converter

Chen, Weisong; Xu, Mingxia; Ge, Yanhua; Guo, Qinglin; Jiang, Tao; Che, Xiangzhong

doi:10.1109/icet55676.2022.9824541

Cited by 4 publications

(4 citation statements)

References 6 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: 65%

“…At the normal input voltage of 390 V in Table 3, the transformer turn ratio is given as in Equation (32). 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.…”

Section: Optimal Design Processmentioning

confidence: 99%

See 1 more Smart Citation

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: 65%

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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“…7,8 The difficulty of the frequency control approach makes it difficult to study and model the resonant converter characteristics, which makes it difficult to adequately characterize the resonant converter using the widely used fundamental wave analysis method, making the parameter design of the converter more difficult. [9][10][11] However, these converters have significant voltage and current stresses in the switches and considerable circulating losses. Another way to reduce switching loss is to employ PWM soft switching technology, particularly the primary-side phase shifted (PPS) full-bridge (FB) DC-DC converter, which is extensively used.…”

Section: Introductionmentioning

confidence: 99%

“…The performance of LLC‐type resonant converters is particularly impressive 7,8 . The difficulty of the frequency control approach makes it difficult to study and model the resonant converter characteristics, which makes it difficult to adequately characterize the resonant converter using the widely used fundamental wave analysis method, making the parameter design of the converter more difficult 9–11 . However, these converters have significant voltage and current stresses in the switches and considerable circulating losses.…”

Section: Introductionmentioning

confidence: 99%

Real time online efficiency optimization of buck converter against variable voltage and load change

Chen

Tang

et al. 2022

Circuit Theory & Apps

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In order to address the issue of keeping the converter operating at a high efficiency level under different conditions, this paper suggests an adaptive step frequency adjustment online optimization search algorithm, which achieves the goal of fast adjustment and real‐time response to parameter changes. The converter is quickly adjusted to operate at a high efficiency by sampling the input and output current values and modulating the switching frequency utilizing the algorithm. Additionally, the algorithm shifts between two working models to finish the search for the best switching frequency while the converter's characteristics do not change. Moreover, it accomplishes the objective of instantly resynchronizing the algorithm after a change in the converter's parameters and starting a search for the best switching frequency in the new converter state. For various input voltages and output loads, the operating principle, optimal frequency, and efficiency are given. In addition, the principle analysis when the converter parameters are changed is provided, and the choice of two algorithm models is compared. Finally, a prototype buck converter with adjustable input voltage and load is constructed to test the algorithm's efficiency.

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Parameter Design for LCC Resonant Converter Applied to High Voltage Energy Storage

Shuai

Liao²,

Xiong³

2023

2023 Panda Forum on Power and Energy (PandaFPE)

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Parameter Design of High Power LLC Resonant Converter

Cited by 4 publications

References 6 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

Real time online efficiency optimization of buck converter against variable voltage and load change

Parameter Design for LCC Resonant Converter Applied to High Voltage Energy Storage

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