Analysis of Diode Reverse Recovery Effect on ZVS Condition for GaN-Based LLC Resonant Converter

Wen, Hao; Gong, Jinwu; Zhao, Xiaonan; Yeh, Chih-Shen; Lai, Jih‐Sheng

doi:10.1109/tpel.2019.2909426

Cited by 43 publications

(13 citation statements)

References 35 publications

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“…11, it can be seen to agree on the experimental waveforms with the numerical waveforms quantitatively. Therefore, these results show the validities of the converter modeling in (9) and the numerical computations for the converter-characteristic visualizations. Additionally, it can also be confirmed from Fig.…”

Section: Experimental Verificationssupporting

confidence: 67%

“…One of the well-known solutions for switching-loss reduction is to add the resonant mechanism to the circuit operation [4]. The LLC converter [5]- [9], which has already been in practical use, is a typical resonant converter. The LLC converter usually adopts the frequency modulation (FM) control to regulate the output voltage.…”

Section: Introductionmentioning

confidence: 99%

“…The LLC converter usually adopts the frequency modulation (FM) control to regulate the output voltage. Most, the LLC converters, including the commercial ones, use the operating frequencies in a hundred-kilohertz range [5]- [9]. With the appearances of SiC and GaN devices, it is expected to increase in the operating frequency range to a few megahertz ranges mainly.…”

Section: Introductionmentioning

confidence: 99%

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Novel Design Approach of Soft-Switching Resonant Converter With Performance Visualization Algorithm

et al. 2020

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This paper presents a new design approach for the soft-switching resonant converter with satisfying the multiple design conditions. As an example, the FM controlled class-E resonant converter is designed. By applying the class-E inverter at the inverter part, the resonant converter works with high efficiency at high frequencies. The class-E inverter has, however, problems, which are the high peak value of the switch voltage and the difficulty of the zero-voltage switching continuation against the load variations. Additionally, there is a restriction on the peak value of the transformer voltage. In the proposed design approach, we can find the proper component values, which satisfy the multiple constraint conditions simultaneously, by full-use of the numerical computations of the converter-characteristic visualization on the parameter space. From the quantitative agreements between the experimental results and numerical predictions, the validity and effectiveness of the proposed design approach were confirmed. INDEX TERMS Resonant converter, class-E inverter, push-pull class-E inverter, class-D full-wave rectifier, zero-voltage switching, frequency modulation control.

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Section: Experimental Verificationssupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Design Approach of Soft-Switching Resonant Converter With Performance Visualization Algorithm

et al. 2020

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“…The GaN device has a small on-voltage threshold range, fast switching, no reverse recovery loss, low on-resistance, and good high-frequency characteristics, and is able to switch voltage of hundreds of volts in a few nanoseconds [55][56][57] , which can replace siliconbased equipment even in high-frequency conditions of over 1 million Hz.…”

Section: The Future Evolution Of the Llc Resonant Convertermentioning

confidence: 99%

LLC resonant converter topologies and industrial applications — A review

Zeng

Zhang

et al. 2020

Chin. J. Electr. Eng.

121

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Owing to the advantages of high efficiency, high energy density, electrical isolation, low electromagnetic interference (EMI) and harmonic pollution, magnetic integration, wide output ranges, low voltage stress, and high operation frequency, the LLC resonant converters are widely used in various sectors of the electronics-based industries. The history and development of the LLC resonant converters are presented, their advantages are analyzed, three of the most popular LLC resonant converter topologies with detailed assessments of their strengths and drawbacks are elaborated. Furthermore, an important piece of research on the industrial applications of the LLC resonant converters is conducted, mainly including electric vehicle (EV) charging, photovoltaic systems, and light emitting diode (LED) lighting drivers and liquid crystal display (LCD) TV power supplies. Finally, the future evolution of the LLC resonant converter technology is discussed.

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“…Finally, due to the charge-discharge current, the converter may deliver more energy than necessary at very light loads, effectively increasing its large signal gain and limiting the regulation range [28,29].…”

mentioning

confidence: 99%

On the Practical Evaluation of the Switching Loss in the Secondary Side Rectifiers of LLC Converters

et al. 2021

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The switching loss of the secondary side rectifiers in LLC resonant converters can have a noticeable impact on the overall efficiency of the complete power supply and constrain the upper limit of the optimum switching frequencies of the converter. Two are the main contributions to the switching loss in the secondary side rectifiers: on the one hand, the reverse recovery loss (Qrr), most noticeably while operating above the series resonant frequency; and on the other hand, the output capacitance (Coss) hysteresis loss, not previously reported elsewhere, but present in all the operating modes of the converter (under and above the series resonant frequency). In this paper, a new technique is proposed for the measurement of the switching losses in the rectifiers of the LLC and other isolated converters. Moreover, two new circuits are introduced for the isolation and measurement of the Coss hysteresis loss, which can be applied to both high-voltage and low-voltage semiconductor devices. Finally, the analysis is experimentally demonstrated, characterizing the switching loss of the rectifiers in a 3 kW LLC converter (410 V input to 50 V output). Furthermore, the Coss hysteresis loss of several high-voltage and low-voltage devices is experimentally verified in the newly proposed measurement circuits.

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Analysis of Diode Reverse Recovery Effect on ZVS Condition for GaN-Based LLC Resonant Converter

Cited by 43 publications

References 35 publications

Novel Design Approach of Soft-Switching Resonant Converter With Performance Visualization Algorithm

Novel Design Approach of Soft-Switching Resonant Converter With Performance Visualization Algorithm

LLC resonant converter topologies and industrial applications — A review

On the Practical Evaluation of the Switching Loss in the Secondary Side Rectifiers of LLC Converters

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