A High Power Density Wide Range DC–DC Converter for Universal Electric Vehicle Charging

Mukherjee, Satyaki; Ruiz, Juan M.; Barbosa, Peter

doi:10.1109/tpel.2022.3217092

Cited by 50 publications

(21 citation statements)

References 28 publications

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“…The losses of a conventional NPC converter are incomparable to the RNPC or the ANPC and make it unsuitable for topology morphing control at high RMS current levels. Multiple strategies have been proposed in the literature to increase the voltage range of resonant power converters; however, they utilize additional relays or contactors for reconfiguration [11,25,26]. The proposed reconfiguration method does not require any additional relays or contactors and is solid-state in nature.…”

Section: A Reconfigurable Neutral-point Clamped Convertermentioning

confidence: 99%

A 15 kW Wide-Input Reconfigurable Three-Level DAB Converter for On-Board Charging of 1.25 kV Electric Vehicle Powertrains

Pradhan,

Shah,

Hassan

et al. 2024

IEEE Trans. Transp. Electrific.

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The demand to reduce charging times and runtime losses in electric vehicles has created a push to increase battery pack's voltage level. 800 V class vehicles in production are approaching the 1 kV voltage limit of the Combined Charging System (CCS) connector. New fast charging standards such as ChaoJi (CHAdeMO 3.0) and Megawatt Charging System (MCS) have voltages defined up to 1.5 kV and 1.25 kV, respectively. The SAE J3068 standard, focused on 3-Φ AC charging, recommends compatibility from 208/120Y to 600/347Y, resulting in a wide voltage variation of the power factor correction (PFC) stage's DC link. This paper proposes a reconfiguration method of a neutralpoint clamped (NPC) converter in a three-level dual active bridge (DAB) converter to accommodate the wide voltage swing. The reconfigurable three-level DAB converter (R3L-DAB) topology is introduced, and its modes of operation are presented. The steady-state analysis and its soft-switching criterion are discussed. A power loss model and design methodology are established to choose the switching frequency (fsw), turns ratio (n), and leakage inductance (L k ). Finally, the experimental results of a 15 kW R3L-DAB converter, with a power density of 3.25 kW/L and peak efficiency of 97.32% are presented.

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Section: A Reconfigurable Neutral-point Clamped Convertermentioning

confidence: 99%

A 15 kW Wide-Input Reconfigurable Three-Level DAB Converter for On-Board Charging of 1.25 kV Electric Vehicle Powertrains

Pradhan,

Shah,

Hassan

et al. 2024

IEEE Trans. Transp. Electrific.

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“…Fig. 5 shows a LCL-T resonant network based stacked half-bridge (SHB) converter, which was proposed in [104]. This converter is fed from a constant voltage 800 V univer-…”

Section: B Bidirectional Isolated Dc-dc Convertermentioning

confidence: 99%

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Pradhan

Keshmiri

Emadi

2023

IEEE Open J. Power Electron.

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The powertrain voltages in battery electric vehicles (BEVs) have witnessed an upward trend due to advantages such as reduced runtime losses and extremely high DC fast charging power levels; aiding in reduced range anxiety and lower battery charging duration. This trend requires original equipment manufacturers (OEMs) to re-assess the design of electronic sub-assemblies (ESAs). Due to newly released DC fast charging standards, there are implications on the on-board charger (OBC), which is one of the ESAs in a BEV. This paper performs a comprehensive review of identifying system-level and use-case related challenges in transitioning on-board chargers to higher voltages compared to state-of-the-art, while considering the impact of newly introduced DC fast charging standards like Megawatt Charging Systems (MCS) and ChaoJi/ CHAdeMO 3.0. The existing research in academia and proof-of-concept designs compatible for high-voltage on-board charging sub-systems, such as the power factor correction (PFC) and isolated DC-DC conversion stages is consolidated. Due to the demand for integration driven by costoptimization targets, single-stage, traction-integrated, and auxiliary power unit (APU) integrated on-board chargers are discussed. Finally, the disparity between state-of-the-art technology and future requirements is defined to establish challenges and the direction of future research areas.

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“…The drain-source voltage overshoot can be limited within the safe range using a snubber circuit [32][33][34]. However, the conventional snubber configurations cannot be used in highfrequency applications because of the limitation in power loss and switching speed [35][36][37]. In practice, the issues associated with the voltage overshoot may be resolved slightly in the converter design stage by employing suitable SiC switches as well as a low parasitic power module (PM) and a PCB layout design [38,39].…”

Section: Introductionmentioning

confidence: 99%

Parasitic-Based Model for Characterizing False Turn-On and Switching-Based Voltage Oscillation in Hybrid T-Type Converter

Babaki,

Golsorkhi,

Christensen

et al. 2024

Electronics

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High frequency and high voltage switching converters utilizing wide bandgap semiconductors are gaining popularity thanks to their compactness and improved efficiency. However, the faster switching requirements gives rise to new challenges. A key issue is the increased oscillation of the drain–source voltage caused by the switching action of the complementary switch in the same phase or change of state of the other phase switches. The voltage stress caused by these oscillations can damage the switch. Furthermore, the high dv/dt during turning-on of one switch might result in false turn-on of the complementary switch due to the miller effect. In this paper, these issues are investigated in a T-type converter through analytical and experimental analysis. Based on the proposed analytical approach, simple and cost-wise solutions utilizing an optimum design of gate driver circuits and circuit layout modifications can be developed to cope with the aforementioned issues. A comprehensive analytical model of the converter with consideration of parasitic capacitances and inductances is developed. By performing sensitivity analysis on the model, the effect of the parasitic parameters on the drain–source voltage oscillation and gate–source voltage amplitude in case of false turn-on is studied. The validity of the model is then assessed through numerical simulations and experimental results.

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A High Power Density Wide Range DC–DC Converter for Universal Electric Vehicle Charging

Cited by 50 publications

References 28 publications

A 15 kW Wide-Input Reconfigurable Three-Level DAB Converter for On-Board Charging of 1.25 kV Electric Vehicle Powertrains

A 15 kW Wide-Input Reconfigurable Three-Level DAB Converter for On-Board Charging of 1.25 kV Electric Vehicle Powertrains

On-Board Chargers for High-Voltage Electric Vehicle Powertrains: Future Trends and Challenges

Parasitic-Based Model for Characterizing False Turn-On and Switching-Based Voltage Oscillation in Hybrid T-Type Converter

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