Design and Development of a Resonant Converter Adapted to Wide Ouput Range in EV Battery Chargers

Kodoth, Ravikrishnan; Harikrishnan, T. L.; Bharath, K R; Kanakasabapathy, P.

doi:10.1109/rteict42901.2018.9012426

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Charging standards such as HPC-350 and upcoming megawatt charging system (MCS) cover a large variety of voltage and current operating points [6], [9]. In order to achieve high-efficiency with fast-switching WBG devices, zero voltage switching (ZVS) topologies are an attractive choice for the power converter [6], [10]- [12]. However, ZVS converters typically need to be operated in a application-specific ZVS area.…”

Section: Introductionmentioning

confidence: 99%

Accurate Prediction of Incomplete Zero-Voltage Switching Dynamics and Losses

Zäch,

Beczkowski,

Jørgensen

et al. 2023

2023 IEEE 10th Workshop on Wide Bandgap Power Devices &Amp; Applications (WiPDA)

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The switching losses occurring between full softswitching and hard-switching are described inadequately, and previous attempts of quantifying incomplete zero-voltage switching losses are topology specific and not applicable for any general half-bridge circuit. The ability to quantify these losses is crucial to optimize the converter efficiency across a wide operating range. This paper proposes a general method for accurately estimating the incomplete zero-voltage switching dynamics and losses in halfbridge converters, including the non-linear output capacitance of the semiconductors. The charge balance during the switching transition period is solved to determine the depth of incomplete zero-voltage switching, which can be used to predict the switching losses. The method is verified experimentally, and is shown to be able to predict the depth of incomplete zero-voltage switching accurately, which can be used to calculate the related losses.

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Section: Introductionmentioning

confidence: 99%

Accurate Prediction of Incomplete Zero-Voltage Switching Dynamics and Losses

Zäch,

Beczkowski,

Jørgensen

et al. 2023

2023 IEEE 10th Workshop on Wide Bandgap Power Devices &Amp; Applications (WiPDA)

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“…Most power converters have been developing in the direction of high efficiency, high power, and high power density due to the demand for consumer electronics. The LLC resonant converter meets the above requirements and is one of the commonly used topologies in recent years, e.g., for server powers, EV chargers, LED drivers, renewable power systems, and wireless power transfer systems [1][2][3][4][5]. There are many advantages, such as zero-voltage switching (ZVS) on the primary side and zero-current switching (ZCS) [6,7] on the secondary side, that can effectively improve the efficiency and increase the feasibility of high switching frequency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Three-Phase Wye-Delta Connected LLC

Lin

Chen

et al. 2021

Energies

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Three-phase wye–delta LLC topology is suitable for voltage step down and high output current, and has been used in the industry for some time, e.g., for server power and EV charger. However, no comprehensive circuit analysis has been performed for three-phase wye–delta LLC. This paper provides complete analysis methods for three-phase wye–delta LLC. The analysis methods include circuit operation, time domain analysis, frequency domain analysis, and state–plane analysis. Circuit operation helps determine the circuit composition and operation sequence. Time domain analysis helps understand the detail operation, equivalent circuit model, and circuit equation. Frequency domain analysis helps obtain the curve of the transfer function and assists in circuit design. State–plane analysis is used for optimal trajectory control (OTC). These analyses not only can calculate the voltage/current stress, but can also help design three-phase wye-delta connected LLC and provide the OTC control reference. In addition, this paper uses PSIM simulation to verify the correctness of analysis. At the end, a 5-kW three-phase wye–delta LLC prototype is realized. The specification of the prototype is a DC input voltage of 380 V and output voltage/current of 48 V/105 A. The peak efficiency is 96.57%.

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