High Power Density Interleaved ZCS 80-kW Boost Converter for Automotive Applications

Christian, Shamar; Fantino, Roberto; Gomez, Roderick A.; Zhao, Yue; Balda, Juan Carlos

doi:10.1109/jestpe.2021.3099408

Cited by 11 publications

(2 citation statements)

References 43 publications

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“…In addition to the advantages of high gain and low input current ripple, which is very important, creating soft switching conditions that lead to increased efficiency is of particular importance. The soft switching techniques such as zero voltage switching (ZVS) [23][24][25][26], zero current switching (ZCS) [27][28][29], or both (ZVZCS) [30,31] are used to eliminate the overlap of voltage and current. As a result, switching losses are reduced and efficiency is increased.…”

Section: Introductionmentioning

confidence: 99%

A new three winding coupled inductors high step‐up DC–DC converter with low input current ripple

Vesali

2023

IET Power Electronics

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A new high step‐up DC–DC converter is proposed in this study. In the proposed converter with voltage lift technique and coupled inductors (CIs) a high voltage gain is achieved. Although the proposed converter has coupled inductors, the input current is continuous and the input current ripple is low. The proposed converter has only one switch and does not have any auxiliary switch, in which the control of the switch is easy. Soft switching condition is presented for the switch in the converter as zero current switching (ZCS) for turning on instant and zero voltage switching (ZVS) for turning off instant, in which the efficiency is increased. For all diodes expect two diodes in the converter ZCS condition is provided when diodes turn off that reverse recovery problem is solved for these diodes. The proposed converter is fully analyzed and described operation of it. To confirm theoretical analysis, 300 W of the proposed converter is implemented and tested, for which in full load an efficiency of 96.5% is achieved.

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Section: Introductionmentioning

confidence: 99%

A new three winding coupled inductors high step‐up DC–DC converter with low input current ripple

Vesali

2023

IET Power Electronics

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“…In [21], a flying capacitor bidirectional DC-DC converter with variable output voltage is presented but the maximum variation in output voltage is limited to 3 times the input voltage. In [22], conventional interleaved boost in discontinuous mode operation with variable switching frequency is discussed with limited voltage gain range and single input. Also, all of these converters do not have multiple input capability to be connected to different battery packs.…”

Section: Introductionmentioning

confidence: 99%

Novel Electric Vehicle Traction Architecture With 48 V Battery and Multi-Input, High Conversion Ratio Converter for High and Variable DC-Link Voltage

Gupta¹,

Chakraborty²

2021

IEEE Open J. Veh. Technol.

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A new architecture for electric vehicle (EV) traction system with multiple low voltage battery packs and high conversion ratio DC-DC converters is proposed here. In EV traction systems, higher voltage motors offer improved efficiency and power density. High power DC fast charging also favors charging at high DC voltages to limit the charging cable current to manageable levels. However, the optimum battery voltage is relatively low considering factors such as issues with large number of cells in series and safety. In some designs, a boost DC-DC converter is employed to accommodate large variation in battery voltage and provide a high DC link voltage. However, the DC link cannot go below the battery voltage (for example, 360 V) which limits the benefits of the DC-DC converter. The proposed architecture with multiple 48 V battery packs and integrated, multi-input, high conversion ratio DC-DC converters, can reduce the maximum voltage in the vehicle during emergencies to 48 V, mitigate issues with large number of cells in series, and provide a wide variable DC link voltage. It enables independent charging/discharging control of the different low-voltage battery modules ensuring cell balancing and enhancing reliability. The proposed topology significantly reduces the voltage stress and peak/RMS current stress of the switches. It features seamless bi-directional power flow characteristics, which support regenerative braking and high voltage DC fast charging. Four distinct configurations are analyzed and the configurations with interleaving are shown to improve performance and significantly reduce the filter inductor size. The proposed high conversion ratio converter (HCRC) operation for EV application is verified experimentally through a 4-phase multi-input, 4 kW hardware prototype. With the nominal input fixed to 48 V, the output voltage is controlled to vary between 200 V to 800 V. The converter achieves a peak efficiency of 98.36% and a full-load efficiency of 97.3% at 50 kHz switching frequency for the interleaved configuration.

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Generalized state‐space averaging modeling to fourth‐order power converters operating in DCM

Dionizio,

Sampaio,

da Silva

2024

Circuit Theory & Apps

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This paper presents a novel methodology for correcting the state‐space averaging (SSA) modeling for DC‐DC power converters represented for fourth‐order systems operating in discontinuous conduction mode (DCM). SSA modeling has been widely employed for converters operating in continuous conduction mode (CCM), obtaining a good similarity between the switched converter and the mathematical model. In contrast, when the converters work in DCM, significant deviations between the average and RMS values imply errors in the SSA model. Hence, the proposed generalized SSA modeling methodology provides an accurate model to aid the controllers and system design. Consequently, the proposed technique can be applied to distinct fourth‐order power converters such as Zeta, Ćuk, and SEPIC in several applications. Additionally, SSA corrections can be associated with different techniques for obtaining the small‐signals representation. Simulation and experimental results and mathematical analyses that prove the feasibility and functionality of the proposal are addressed.

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High Power Density Interleaved ZCS 80-kW Boost Converter for Automotive Applications

Cited by 11 publications

References 43 publications

A new three winding coupled inductors high step‐up DC–DC converter with low input current ripple

A new three winding coupled inductors high step‐up DC–DC converter with low input current ripple

Novel Electric Vehicle Traction Architecture With 48 V Battery and Multi-Input, High Conversion Ratio Converter for High and Variable DC-Link Voltage

Generalized state‐space averaging modeling to fourth‐order power converters operating in DCM

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