Optimization of Extended Phase-Shift Control for Full-Bridge CLLC Resonant Converter With Improved Light-Load Efficiency

Zhu, Tianhua; Zhuo, Fang; Zhao, Fulong; Wang, Feng; Hao, Yi; Zhao, Tong

doi:10.1109/tpel.2020.2978419

Cited by 81 publications

(18 citation statements)

References 29 publications

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“…Calculate P loss by (12) Calculate B 1p by (13) to ensure the range Calculate R 2 by (15) for loss calculating and ensuring the core saturated Fig. 16 Flowchart of power loss calculation.…”

Section: Design For Rangementioning

confidence: 99%

A Fluxgate-Based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter

Qiu

Feng

et al. 2022

IEEE Trans. Power Electron.

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A concern with the isolation transformer in a dual active bridge (DAB) DC-DC converter is the DC bias in magnetization. This paper proposes a fluxgate-based current sensor to measure the DC component mixed with a large, high-frequency AC current. Compared with a commercial Hall effect current sensor, the proposed sensor significantly reduces measurement error. This paper presents the working principle and design considerations. A prototype is demonstrated for DC bias elimination control in a DAB converter. 1

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“…Calculate P loss by (12) Calculate B 1p by (13) to ensure the range Calculate R 2 by (15) for loss calculating and ensuring the core saturated Fig. 16 Flowchart of power loss calculation.…”

Section: Design For Rangementioning

confidence: 99%

A Fluxgate-Based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter

Qiu

Feng

et al. 2022

IEEE Trans. Power Electron.

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“…The DG corelates with the customer demand and other auxiliary converters to form the prosumer. The prosumer needs the management of the generation, the consumption, and the auxiliary converters to effectively utilize the renewables and ensure the stable grid connection (Liu et al, 2020;Zhu et al, 2020). In the recent future, the prosumer may be one of the main forms of the distribution networks.…”

Section: Introductionmentioning

confidence: 99%

The coordinated operation strategy of multi-type power generations in different modes in prosumer with high renewables

Meng²,

Su³

2023

Front. Energy Res.

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The renewable energy with distributed generation is widely used because of the cleanliness and sustainability. However, when high renewables connect to the grid, the randomness and intermittent of the renewable energy will deteriorate the performance. As the important interface between distributed generations and power grid, the prosumer can contribute to the improvement of the renewable energy penetration if stable and reliable operation of the power supply is realized. The prosumer has multi-type generations, loads and auxiliary converters, where the characteristics interact each other. Moreover, due to the complicated grid states, the prosumer may operate in different conditions. Therefore, the research on the coordinated operation control strategy of the multiple electrical facilities is necessary in the prosumer with high renewables. In this paper, the AC/DC hybrid prosumer is established with multi-type distributed generations, loads and auxiliary converters. The prosumer can operate in normal grid-connected mode and grid-fluctuation mode. In different modes, the cooperation control of the power converter in the prosumer is proposed, which changes according to the grid demands. When over-limited grid voltage and frequency fluctuation are detected in the point of common coupling, the prosumer can switch from normal grid-connected mode to grid-fluctuation mode to provide voltage and frequency support. Finally, the simulation results based on Matlab/Simulink is employed to verify the effectiveness of the proposed control strategy.

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“…The studies presented in [9]- [13] provide an elaborated time-domain model highlighting the switching instants and formulating detailed system equations, to analytically calculate the required phase for enabling SR. These methods portray superior tracking accuracy, which is sufficiently backed by detailed sensitivity analysis corresponding to change in system parameters.…”

Section: Introductionmentioning

confidence: 99%

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

Chandwani

Mallik

Aktruk

2023

IEEE Open J. Power Electron.

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With an objective to reduce the switching losses in a bidirectional resonant CLLC DC/DC converter for electric vehicle (EV) charging applications, this paper presents an elaborate frequency dependent general harmonic approximation (GHA) based secondary side turnoff current minimization technique by investigating the optimum operating point to achieve synchronous rectification (SR). Formulation of an accurate all-inclusive gain model is presented, specifically focusing on effect of parasitic components on the resultant gain-frequency trend, backed with thorough experimental validation. Further, meticulous modeling of the GHA based state equations is presented to obtain a contour of feasible operational frequencies and corresponding phase shifts to ascertain accurate SR operation with a multi-dimensional optimization technique to ensure reduced switching losses. In addition to that, to precisely characterize the resonant tank equivalent circuit, stressing on its effect on SR phase calculation, a detailed 3D finite element analysis (FEA) based R-L-C modelling of the employed high frequency planar transformer (HFPT) is explained. To validate and benchmark the performance of the proposed gain model while ensuring accurate SR operation, a 1kW all-GaN based CLLC experimental prototype is developed for a resonant frequency of 500kHz, with a power density of 106 W/inch 3 . Experimental waveforms at corner conditions are presented for a wide-gain bidirectional operation, portraying a peak converter efficiency of 98.49%.

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Optimization of Extended Phase-Shift Control for Full-Bridge CLLC Resonant Converter With Improved Light-Load Efficiency

Cited by 81 publications

References 29 publications

A Fluxgate-Based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter

A Fluxgate-Based Current Sensor for DC Bias Elimination in a Dual Active Bridge Converter

The coordinated operation strategy of multi-type power generations in different modes in prosumer with high renewables

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

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