Three-Phase Bidirectional Ultra-Wide Output Voltage Range Current DC-Link AC/DC Buck-Boost Converter

Zhang, Daifei; Guacci, Mattia; Kolar, Johann W.; Everts, Jordi

doi:10.1109/iecon43393.2020.9254753

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…From ( 8), ( 9), and (10), k in terms of the system parameters and the tolerances is expressed in (11), where ω is the angular frequency. Then, the current sharing error can be determined as:…”

Section: Parallel Mode Current Sharingmentioning

confidence: 99%

“…The charging module in dc-connected fast charging station needs to cover a wide output voltage range of 200-1000 V. Moreover, the charging station should have a flexible structure to facilitate charging at higher power levels. So, the charging module should be easily stacked to increase Several solutions have been proposed in the literature for the ultra-fast chargers, however most of them are for ac-connected structures assuming variable input voltage to the charging module [6], [8]- [11]. Nevertheless, some researches proposed solutions for dc-connected structures.…”

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confidence: 99%

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High Efficiency LLC Resonant Converter With Wide Output Range of 200–1000 V for DC-Connected EVs Ultra-Fast Charging Stations

et al. 2023

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DC-connected ultra-fast chargers consist of isolated DC/DC converter modules to provide the required charging profile. This paper proposes a charging module that interfaces with a fixed voltage DC-bus and covers a wide variety of electric vehicles (EVs) with battery voltages ranging from 200 to 1000 V. DC/DC converters for EVs charging has been discussed several times in the literature, however the DC-connected structure with fixed DC-bus voltage is rarely considered. This paper proposes a fullbridge LLC DC/DC converter module with a configurable secondary. This configuration extends the converter's charging voltage range without adding stress on the resonant components or operating far from the unity gain point. Due to wide output range, the converter parameters are optimized using the timedomain analytical model to cover the required range without adding unnecessary circulating current that compromises the efficiency. First, the LLC resonant converter fundamentals are briefly introduced. Then, the proposed topology operation and advantages are discussed. After which, the converter's requirements and design method are presented, focusing on circulating current minimization. Finally, the effectiveness of the proposed converter and the optimized design strategy is verified experimentally on a 10 kW prototype with an input of 800 V and an output of 200 -1000 V.INDEX TERMS LLC resonant converter, dc/dc converters, electric vehicle fast charging, reconfigurable structure, wide output range I. INTRODUCTION

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Section: Parallel Mode Current Sharingmentioning

confidence: 99%

mentioning

confidence: 99%

High Efficiency LLC Resonant Converter With Wide Output Range of 200–1000 V for DC-Connected EVs Ultra-Fast Charging Stations

et al. 2023

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“…The control loop for output voltage or current regulation can incorporate variation either on the ac/dc or dc/dc stage, or both, depending upon the region of operation. An approach for current-fed PFC rectifiers is to buck/boost the PFC DC link voltage while maintaining a unity conversion ratio of the dc/dc stage to maintain highefficiency operation [7]. In the case of conventional PFC rectifiers, their efficiency reduces as the voltage gain increases due to elevated hard-switching losses [8].…”

Section: Introductionmentioning

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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“…such converters worked with PWM control experience some dis-favors that have limited their use which can be; 1)a unmarried controller have been applied to controlled dc transporting which live unregulated [6]- [9]; and a couple of) the 2-level geologies were executed which closes into the excessive voltage and current tensions on the converter conveyed materials [6]- [9]. thus, the single-stage converters are controlled their use for high-power applications [10]…”

Section: Introductionmentioning

confidence: 99%

A Three-Level Isolated fuzzy controlled AC-DC PFC Power Converter Topology with Reduced Number of Switches

Kanimozhi¹,

Krishnaveni²

2022

ESP-JETA

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The essential objective of this work is to build an extraordinary failure esteem separated three-degree ac-dc strength converter geography with a decreased wide assortment of switches. existing three-degree converter geographies exchange ac energy to dc strength while saving necessities set by means of worldwide prerequisites for strength transformation. those types of converters have sizeable conduction misfortunes in view of unnecessary flows inside the low-voltage aspect and exorbitant costs, explicitly while involving various fiery devices in assortment or in lined up with gain unreasonable voltage and high-energy degrees. The proposed geography utilizes fluffy presence of mind make due (FLC) for PWM innovation. A FLC grants the relative, fundamental, and result benefits to be acclimated to work ideally to control the machine and hence make it a fitting for control of DC converter The proposed geography replaces the customary 3-degree converters inside the optional side by handiest two oversaw gadgets and four diodes while by the by keeping up with the essential capacity of a 3-degree converter. in addition, MATLAB recreation results utilized for check out and exploratory outcomes to show the plausibility of the proposed contemplations.

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Three-Phase Bidirectional Ultra-Wide Output Voltage Range Current DC-Link AC/DC Buck-Boost Converter

Cited by 10 publications

References 10 publications

High Efficiency LLC Resonant Converter With Wide Output Range of 200–1000 V for DC-Connected EVs Ultra-Fast Charging Stations

High Efficiency LLC Resonant Converter With Wide Output Range of 200–1000 V for DC-Connected EVs Ultra-Fast Charging Stations

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

A Three-Level Isolated fuzzy controlled AC-DC PFC Power Converter Topology with Reduced Number of Switches

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