The Analysis of Current Sharing Effect for Two-Unit Paralleled Common Capacitor <i>LLC</i> Resonant Converter

Tang, Wei; Wang, Hongliang; Zhu, Xiaonan; Mo, Wenhui; Gao, Wenyong; Yue, Xiumei

doi:10.1109/tie.2022.3170610

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…Proposes a current sharing method for co-resonant inductors. Similarly 23 , 24 , Uses a co-resonant capacitor 25 . Proposed a magnetic coupling-current balancing (MC-CB) cell, which is connected between the two-phase LLC resonant tanks to achieve current sharing 26 .…”

Section: Introductionmentioning

confidence: 99%

A single-bridge interleaved three-level LLC resonant converter with current sharing capability for fuel cell system

Zhao,

Cheng,

et al. 2024

Sci Rep

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This paper propose a wide gain single-bridge interleaved three-level LLC resonant converter with current sharing capability. This novel converter offers numerous advantages, including low cost, low current ripple, reduced voltage and current stress, widely gain range, high efficiency, good current sharing capability and versatile application scalability. Utilizing the three-level inverter + full-wave rectifier LLC converter as a representative case, the paper conducts an in-depth analysis and research on the proposed method. Finality, a 600 W experimental prototype was constructed and tested. Experimental results reveal that the proposed converter exhibits lower current ripple and a broader gain range. Moreover, the converter shows good current sharing capability (with a resonant element tolerance of 10%, the current error between the two phases does not exceed 12%) and high efficiency (peaking at 95.8%).

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Section: Introductionmentioning

confidence: 99%

A single-bridge interleaved three-level LLC resonant converter with current sharing capability for fuel cell system

Zhao,

Cheng,

et al. 2024

Sci Rep

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“…To widen the voltage gain, a reconfigurable LLC resonant converter is proposed in [18], but the converter`s control and hardware are more complex. The integrated three-phase HB LLC resonant converter in [19,20] is also a useful scheme to obtain wide voltage gain, but the current stress of the power switches on the primary side is high, and the conduction loss is high. Some studies are conducted to narrow the operating frequency to reduce the switching loss.…”

Section: Introductionmentioning

confidence: 99%

Modified Two-Channel LLC Resonant Converter With Optimal Efficiency for Wide Input Voltage Applications

2023

IEEE Access

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A modified two-channel LLC resonant converter with optimal efficiency for wide input voltage applications. The converter has the same voltage gain and power handing ability as conventional full-bridge (FB) resonant converter, but the hardware cost is lower than conventional FB resonant converter, and the operational frequency range is narrower than conventional resonant converter for the same working condition. It has the characteristics of low input impedance at low input voltage, which is used to provide high voltage gain, and high input impedance at high input voltage, which is used to provide low voltage gain, the above characteristics are analyzed and optimized to improve the efficiency for photovoltaic applications where wide voltage gain is require. A 1 kW prototype is developed, the input voltage ranges from 80 V to 200 V, the output voltage and output power are 400 V and 1 kW, the experimental result shows that the full-load efficiency can reach 96.5% over the entire input voltage range, and the peak efficiency can reach 96.9% at full-load state.INDEX TERMS resonant converter; photovoltaic; wide input voltage; high efficiency; DC/DC conversion.

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A stability improvement control strategy research for LLC resonant converter with single neuron PI-I double closed loop control

Yang,

Zhou

2024

Ain Shams Engineering Journal

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The Analysis of Current Sharing Effect for Two-Unit Paralleled Common Capacitor LLC Resonant Converter

Cited by 8 publications

References 30 publications

A single-bridge interleaved three-level LLC resonant converter with current sharing capability for fuel cell system

A single-bridge interleaved three-level LLC resonant converter with current sharing capability for fuel cell system

Modified Two-Channel LLC Resonant Converter With Optimal Efficiency for Wide Input Voltage Applications

A stability improvement control strategy research for LLC resonant converter with single neuron PI-I double closed loop control

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