Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Karakaya, Furkan; Gülsuna, Özgür; Keysan, Ozan

doi:10.3390/en14102867

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Fig. 6 displays two interleaved half-bridges with device paralleling, Quasi-Square-Wave (QSW) and ZVS [59]. Fig.…”

Section: B Level 2 (37 Kw Up To 22 Kw)mentioning

confidence: 99%

Review of Bidirectional DC-DC Converters and Trends in Control Techniques for Applications in Electric Vehicles

Martinez-Vera,

Banuelos-Sanchez

2024

IEEE Latin Am. Trans.

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This paper comprehensively reviews bidirectional DC-DC converters and their control techniques for Electric Vehicle applications. A classification is proposed based on the three power ratings levels of the SAEJ1772 standard. Circuit topologies are compared based on power rating, switching frequency, static voltage gain, operating modes, number of components and power switch material. High switching-frequency topologies that include emerging Wide Bandgap (WBG) devices are also discussed. Cost comparison of traditional Si power switches and WBG devices employed in the reviewed topologies is also included. Traditional control methods for power converters in EVs are presented while also considering the emergence of Artificial Intelligence algorithms applied in systems controls that offer alternative methods to improve the efficiency of bidirectional DC-DC converters.

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“…Fig. 6 displays two interleaved half-bridges with device paralleling, Quasi-Square-Wave (QSW) and ZVS [59]. Fig.…”

Section: B Level 2 (37 Kw Up To 22 Kw)mentioning

confidence: 99%

Review of Bidirectional DC-DC Converters and Trends in Control Techniques for Applications in Electric Vehicles

Martinez-Vera,

Banuelos-Sanchez

2024

IEEE Latin Am. Trans.

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“…The pulse square wave voltage is characterised by high frequency, large rise rate (DV/DT) and short rise time [35][36][37]. The pulse square wave voltage waveform simulated using MATLAB is shown in Figure 7.…”

Section: Simulation Analysismentioning

confidence: 99%

Power Interference Suppression Method for Measuring Partial Discharges under Pulse Square Voltage Conditions

Wei

2022

Energies

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Partial discharge (PD) is an important metric for the insulation diagnosis of power equipment. However, its detection is affected by the strong electromagnetic interference generated by pulse square voltage. We therefore propose a power interference suppression method for partial discharges under pulse square voltage based on a quadratic measurement method. We conduct analysis of the topology circuit when partial discharge occurs in the insulation test sample and introduce the basic principle of the secondary measurement method according to the superposition principle and the linear relationship between the square voltages at different peak values. We verify the feasibility of this method by simulating a PD signal with power interference. Subsequently, we use the successive interception comparison method to solve the non-correspondence of the two initial measurement points problem and design and manufacture the transformer turn-to-turn oil-paper insulation test sample and experimental tank. By measuring the PD starting voltage of the insulation test sample under the power frequency voltage, we determined the first measurement voltage under the pulse square voltage and obtained the signal x1(t) to subsequently measure the PD signal x2(t). According to the proposed successive interception comparison method, the signal x1(t) is processed, and the secondary measurement method suppresses the power interference of the measured signal x2(t). We demonstrate that the proposed method effectively suppresses the power interference in PD detection under a pulse square voltage.

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“…GaN devices offer superior converter performance due to their ability to switch at higher frequencies than conventional Silicon (Si) devices [1][2][3][4][5][6][7]. Enhancement-mode (E-mode) GaN HEMTs are gaining popularity in switching power supplies because they are inherently normally off devices [8][9][10]. However, these devices have stringent gate driving voltage limits (-10 to 7 V) and often require additional protection circuits [11].…”

Section: Introductionmentioning

confidence: 99%

Comparisons on Different Innovative Cascode GaN HEMT E-Mode Power Modules and Their Efficiencies on the Flyback Converter

Liu

Anand

et al. 2021

Energies

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The conventional cascode structure for driving depletion-mode (D-mode) gallium nitride (GaN) high electron mobility transistors (HEMTs) raises reliability concerns. This is because of the possibility of the gate to source voltage of the GaN HEMT surging to a negative voltage during the turn off transition. The existing solutions for this problem in the literature produce additional drawbacks such as reducing the switching frequency or introducing many additional components. These drawbacks may outweigh the advantages of using a GaN HEMT over its silicon (Si) alternative. This paper proposes two innovative gate drive circuits for D-mode GaN HEMTs—namely the GaN-switching based cascode GaN HEMT and the modified GaN-switching based cascode GaN HEMT. In these schemes, the Si MOSFET in series with the D-mode GaN HEMT is always turned on during regular operation. The GaN HEMT is then switched on and off by using a charge pump based circuit and a conventional gate driver. Since the GaN HEMT is driven independently, the highly negative gate-to-source voltage surge during turn off is avoided, and in addition, high switching frequency operation is made possible. Only two diodes and one capacitor are used in each of the schemes. The application of the proposed circuits is experimentally demonstrated in a high voltage flyback converter, where more than 96% efficiency is obtained for 60 W output load.

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Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs

Cited by 5 publications

References 31 publications

Review of Bidirectional DC-DC Converters and Trends in Control Techniques for Applications in Electric Vehicles

Review of Bidirectional DC-DC Converters and Trends in Control Techniques for Applications in Electric Vehicles

Power Interference Suppression Method for Measuring Partial Discharges under Pulse Square Voltage Conditions

Comparisons on Different Innovative Cascode GaN HEMT E-Mode Power Modules and Their Efficiencies on the Flyback Converter

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