Univesal Design of LLC Resonant Converter with Fixed Switching Frequency

Xu, Jiangtao; Wei, Yun; Cheng, Xin; Yang, Huei-Jiun; Xue, Hong; Wang, Xuehua

doi:10.1109/iciba50161.2020.9277356

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The magnetizing inductance and the leakage inductances of the transformer perform the functions of the parallel and the series inductances respectively. The circuit behavior of the LLC converter is described by the Fundamental Frequency Analysis (FHA) (27) . From the FHA, the voltage gain of the input and the output voltages Vout / Vin is formulated in Eq.…”

Section: Circuit Parameter Design For 48 V-48 V 450 W Llc Converter M...mentioning

confidence: 99%

99%, 15W/cm<sup>3</sup> Capacitively Coupled Modular DCPET for Low-Voltage DC Power Supply Systems

2023

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A capacitively coupled modular DC-DC power electronic transformer (DCPET) has been proposed. The proposed DCPET consists of capacitively coupled unregulated LLC resonant converter modules; these modules are connected in series-parallel combinations. The capacitive coupling topology is considered to be promising to develop highly efficient high-power-density converter modules, and the series-parallel connection of these modules smoothly achieves various voltage ratios of DCPETs. A trial design for a 48 V-48 V, 450 W capacitively coupled LLC converter module using GaN-FETs has been demonstrated, and the potential to achieve 99%, 15 W/cm 3 has been confirmed. Moreover, the 48 V-384 V DCPET using eight 98.8%, 15 W/cm 3 converter modules has been demonstrated, and the feasibility of the proposed topology has been verified. The proposed DCPET overcomes the stagnant relationship between the efficiency and the output power density of isolated converters, and the proposed topology contributes to the prevalence of power electronics equipment for the economical use of electric power.

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Section: Circuit Parameter Design For 48 V-48 V 450 W Llc Converter M...mentioning

confidence: 99%

99%, 15W/cm<sup>3</sup> Capacitively Coupled Modular DCPET for Low-Voltage DC Power Supply Systems

2023

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“…The highest possible efficiency level is 96.58%. The LLC resonant converter design proposed in [29] is noteworthy for its universal applicability and constant switching frequency. The technique of using a lower switching frequency than the resonant frequency for ZVS operation is a unique feature of this design.…”

Section: Related Workmentioning

confidence: 99%

Resonant DC/DC Converters: Investigating Phase-Shift Control

Reddy,

Bhaskar,

Subramaniam

2023

Energies

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The paper presents an innovative approach to control the voltage of an LCL-T type converter at the output side against variation at input and load ports, utilizing a fixed-frequency phase-shift control scheme. The examination of the converter is performed employing a Fourier series method that takes into account the effect of n-harmonics. To assure high-frequency switches with a zero-voltage switching (ZVS) technique, the lagging pf mode is utilized. PSIM simulations were used to investigate the performance of a 300 W converter. With the minimal input voltage, all switches turn on with ZVS for all loading conditions, whereas the ZVS strategy loses by two switches when the voltage at the input is highest. The power loss calculations of each component are performed and presented in a pie chart. The findings of the experiments are presented and verified with theoretical and simulation results. It is demonstrated that for both input voltage and load fluctuations, a minor adjustment in pulse width is sufficient to keep the output voltage constant.

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Optimal Design for Efficiency Improvement in Three Element Resonant Converters Based on their Load Dependent Properties

Ghosh

Vyapari

2022

2022 IEEE 16th International Conference on Compatibility, Power Electronics, and Power Engineering (CPE-POWERENG)

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Univesal Design of LLC Resonant Converter with Fixed Switching Frequency

Cited by 4 publications

References 8 publications

99%, 15W/cm<sup>3</sup> Capacitively Coupled Modular DCPET for Low-Voltage DC Power Supply Systems

99%, 15W/cm<sup>3</sup> Capacitively Coupled Modular DCPET for Low-Voltage DC Power Supply Systems

Resonant DC/DC Converters: Investigating Phase-Shift Control

Optimal Design for Efficiency Improvement in Three Element Resonant Converters Based on their Load Dependent Properties

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