Loss analysis of half-bridge LLC resonant converter

Yang, Chun-Hsu; Liang, Tsorng–Juu; Chen, Kai–Hui; Li, Ji-Shiuan; Lee, Ji-Shiang

doi:10.1109/ifeec.2013.6687496

Cited by 44 publications

(17 citation statements)

References 4 publications

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“…According to [31], the conduction losses for the passive elements are modelled as an equivalent series resistor (ESR). For the capacitor, the ESR value can be estimated by the following equation:

R E S R = \frac{\tan false(δ false)}{2 π f normals C}

where

\tan false(δ false)

is the dissipation factor of the capacitor.…”

Section: Design Considerations For the Fbllc Converter Discussed Inmentioning

confidence: 99%

Wide voltage gain range application for full‐bridge LLC resonant converter with narrow switching frequency range

Wei

Luo

Wang

et al. 2020

IET power electron.

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R E S R = \frac{\tan false(δ false)}{2 π f normals C}

where

\tan false(δ false)

is the dissipation factor of the capacitor.…”

Section: Design Considerations For the Fbllc Converter Discussed Inmentioning

confidence: 99%

Wide voltage gain range application for full‐bridge LLC resonant converter with narrow switching frequency range

Wei

Luo

Wang

et al. 2020

IET power electron.

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“…For the magnetically controlled LLC resonant converter, the power loss mainly include the following aspects: 1) variable resonant inductor loss; 2) primary switch loss; 3) output capacitor loss; 4) transformer loss; 5) secondary rectifier loss; 7) driver circuit loss; 8) control circuit loss. Compared with the traditional power loss analysis of the frequency controlled LLC resonant converter [28], the differences only exist in variable resonant inductor loss, transformer loss, and control circuit loss. Therefore, only the discussion of the variable resonant inductor loss, transformer loss, and control circuit loss are presented in this paper.…”

Section: Power Loss Analysismentioning

confidence: 99%

Comprehensive Analysis and Design of LLC Resonant Converter With Magnetic Control

Wei¹,

Luo²,

Mantooth³

2019

CPSS TPEA

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Conventionally, LLC resonant converter adopts frequency control (FC) or combine FC with phase shift control (PSC) to regulate the output voltage. However, for both control strategies, a variable switching frequency operation range is required, which makes the magnetic component and driver circuit design complicated. In this paper, the magnetic control (MC) or variable inductor control is adopted for the LLC resonant converter. Thanks to MC, constant switching frequency and duty cycle can be implemented for the primary switches. A comprehensive analysis of the magnetically controlled LLC resonant converter is presented, which includes the operation principle, voltage gain, and soft switching operation. Meanwhile, a design methodology for LLC resonant converter with MC is proposed, especially the design considerations for the variable inductor are discussed. By adopting the proposed design methodology, the zero voltage switching (ZVS) operation for the primary switches and the zero current switching (ZCS) operation for the secondary rectifier can be achieved. Finally, a 200 W experimental setup is built to validate the theoretical analysis.

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“…Since the switches usually turn on under ZVS condition, switching losses at turn-on can be neglected. In [12,23] the power-loss equations are elaborated specifically. The voltage and current of LLC resonant converters in different operation modes are presented in [12]; these voltage and currents are essential for loss calculation.…”

Section: Monte Carlo Optimizationmentioning

confidence: 99%

A Comparative Study of Different Optimization Methods for Resonance Half-Bridge Converter

2018

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The LLC resonance half-bridge converter is one of the most popular DC-DC converters and could easily inspire researchers to design a high-efficiency and high-power-density converter. LLC resonance converters have diverse operation modes based on switching frequency and load that cause designing and optimizing procedure to vary in different modes. In this paper, different operation modes of the LLC half-bridge converter that investigate different optimization procedures are introduced. The results of applying some usual optimization methods implies that for each operation mode some specific methods are more appropriate to achieve high efficiency. To verify the results of each optimization, numerous simulations are done by Pspice and MATLAB and the efficiencies are calculated to compare them. Finally, to verify the result of optimization, the experimental results of a laboratory prototype are provided.

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Loss analysis of half-bridge LLC resonant converter

Cited by 44 publications

References 4 publications

Wide voltage gain range application for full‐bridge LLC resonant converter with narrow switching frequency range

Wide voltage gain range application for full‐bridge LLC resonant converter with narrow switching frequency range

Comprehensive Analysis and Design of LLC Resonant Converter With Magnetic Control

A Comparative Study of Different Optimization Methods for Resonance Half-Bridge Converter

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