High-Efficiency Bidirectional Three-Level Series-Resonant Converter With Buck-Boost Capacity for High-Output Voltage Applications

Yang, Dongjiang; Duan, Bin; Zhang, Chenghui; Song, Jinqiu; Bai, Hao; Su, Qijun

doi:10.1109/tte.2021.3055208

Cited by 12 publications

(12 citation statements)

References 30 publications

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“…The average power transferred between the DC links is given by (13). By solving i p (t) in modes 1, 2, and 3, the power transfer equations in their respective modes are given by ( 14), (15), and (16). The leakage inductance RMS current i p(rms) through the R3L-DAB converter is calculated using its general form as seen in (18).…”

Section: Steady-state Analysismentioning

confidence: 99%

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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: Steady-state Analysismentioning

confidence: 99%

“…Selection of the turns ratio n, switching frequency f sw , and leakage inductance L k affects the average efficiency of the R3L-DAB converter. The normalized high-frequency link impedance Z norm is calculated using (16), where the equation is evaluated at φ = 0.5, D 1 = 0, D 2 = 0. The value of the…”

Section: A Optimization Proceduresmentioning

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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“…Topologies with output voltages of 400 VDC address current popular EV models [21], [22]. 800 VDC output voltage topologies are also under development to increase the EV range [44], [45]. A wide voltage range with low parts count is preferred to increase power density and reduce cost.…”

Section: Power Rating Classification Of Bidirectional Dc-dc Convertersmentioning

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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“…Selecting the sampling starting point and endpoint evaluation basis of the highest battery voltage in the system can effectively maximize the battery module capacity. The DC–DC transformer with a wide voltage range high efficiency and high voltage level is proposed in Yang et al 13 The converter is mainly composed of two switching networks and a resonant tank, in which the transformer plays a key role in the process of zero‐voltage switching. Additionally, some widely adopted methods for achieving high accuracy on SOC estimation are adopted.…”

Section: Introductionmentioning

confidence: 99%

The control and evaluation method of the cascaded buck–boost converter for equalization on battery strings

Chen

Wang

Huang

et al. 2022

Circuit Theory & Apps

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With the further implementation of the carbon peak carbon neutral strategy, new energy vehicles will play an important cornerstone in the realization of this policy. However, the power source lithium battery pack has reduced the charge and discharge capacity due to the variation in the energy of the single cells, which largely limits the wide application of new energy vehicles. A cascaded buck–boost converter is proposed to balance the inconsistent energy in the battery pack. This equalization circuit is equipped with two fundamental working modes on which a matrix equalization strategy is developed and optimized accordingly. Then, the systematic evaluation method on average efficiency and time is applied to investigate the performance of the converter. Subsequently, the proposed converter and its control method have shown better performance than the existing equalization circuit via simulation and experimental verification. The design has high scalability and is expected to be applied to large‐scale energy storage systems to serve the construction of the global energy Internet.

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High-Efficiency Bidirectional Three-Level Series-Resonant Converter With Buck-Boost Capacity for High-Output Voltage Applications

Cited by 12 publications

References 30 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

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

The control and evaluation method of the cascaded buck–boost converter for equalization on battery strings

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