Design of a High-to-Low Voltage, Low-Power, Isolated DC/DC Converter for EV Applications

Foray, Etienne; Martin, Christian; Allard, Bruno; Bevilacqua, Pascal

doi:10.1109/jestpe.2022.3144281

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…Power generation systems utilizing RES generates a low-level output voltage; therefore, requisite effective DC–DC converters having higher voltage gain capability [ 5 ]. Other than renewable power conversion, numerous other applications utilize DC–DC converters, such as electric vehicles, electric traction systems, power back-up systems, surgical equipment, and lighting applications [ 6 , 7 ]. In earlier times, conventional DC–DC converters were opted for voltage-boosting applications.…”

Section: Introductionmentioning

confidence: 99%

A Novel Non-Isolated High-Gain Non-Inverting Interleaved DC–DC Converter

et al. 2023

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High-gain DC–DC converters are being drastically utilized in renewable energy generation systems, such as photovoltaic (PV) and fuel cells (FC). Renewable energy sources (RES) persist with low-level output voltage; therefore, high-gain DC–DC converters are essentially integrated with RES for satisfactory performance. This paper proposes a non-isolated high-gain non-inverting interleaved DC–DC boost converter. The proposed DC–DC converter topology is comprised of two inductors and these are charging and discharging in series and parallel circuit configurations. The voltage multiplier technique is being utilized to produce high gain. The proposed topology is designed to operate in three modes of operation. Three switches are operated utilizing two distinct duty ratios to avoid the extreme duty ratio while having high voltage gain. Owing to its intelligent design, the voltage stress on the switches is also significantly reduced where the maximum stress is only 50% of the output voltage. The proposed converter’s steady-state analysis with two distinct duty ratios is thoroughly explored. Furthermore, a 160 W 20/400 V prototype is developed for performance analysis and validation. The converter topology can generate output voltage with a very high voltage gain of 20, which is verified by the prototype. Moreover, a high efficiency of 93.2% is attained by the proposed converter’s hardware prototype.

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Section: Introductionmentioning

confidence: 99%

A Novel Non-Isolated High-Gain Non-Inverting Interleaved DC–DC Converter

et al. 2023

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“…DC‐DC converters are often classified as isolated or non‐isolated depending on the application requirements and the design of the circuit. High voltage gain may be accomplished in isolated converters by increasing the turns ratio of the transformer, but increasing turns ratios result in heavier and larger transformers and decreasing efficiency 4 . It is thus preferable to use non‐isolated structures when isolated ones are not essential.…”

Section: Introductionmentioning

confidence: 99%

“…High voltage gain may be accomplished in isolated converters by increasing the turns ratio of the transformer, but increasing turns ratios result in heavier and larger transformers and decreasing efficiency. 4 It is thus preferable to use non-isolated structures when isolated ones are not essential. To have high voltage gain, the most straightforward non-isolated construction is the basic boost converter; however, it suffers from difficulties including high voltage and current stress on semiconductors and the diode reverse recovery problem, as well as a poor efficiency.…”

mentioning

confidence: 99%

A modified configuration of high step‐up non‐isolated DC‐DC converter with low voltage stress: Analysis, design, and implementation

Mohajery

Shayeghi

Sedaghati

et al. 2023

Circuit Theory & Apps

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SummaryThis study develops a novel DC‐DC converter with an extremely high voltage conversion ratio that utilizes just one switch, a voltage multiplier circuit (VMC), and a coupled‐inductor. Two diodes and two capacitors comprise the VMC, employed to reach high voltage gain. Consequently, the conduction loss is minimized by using a low voltage rated switch with lower RDS(on). Due to the coupled inductor's leakage inductance, the output diodes' reverse recovery trouble is solved. Moreover, the passive clamp technique stores and recycles leakage energy at the output. The proposed DC‐DC converter features are high conversion ratio, low maximum voltage on semiconductors, remarkable efficiency, the existence of only one active low voltage switch, and simple circuit topology with common ground between the input and the output. This paper outlines CCM, BCM, and DCM's operating concept and steady‐state analysis in great detail. Furthermore, the suggested structure's capability is indicated by mathematical analysis and comparative findings with other earlier structures. Eventually, experimental findings with 210 W output power and 25 kHz switching frequency demonstrates that the proposed converter can be used successfully.

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Research on Cascaded On‐Board DC/DC Converter Based on Three‐Phase Interleaved LLC

Zhou,

Zheng,

Liu

2024

Circuit Theory & Apps

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The on‐board DC/DC converter proposed in this research consists of a Buck converter and a three‐phase interleaved LLC resonant converter. This paper analyzes the average current and output current ripple characteristics of the rear‐stage converter in addition to explaining the topology and working principles of the front‐stage Buck converter and the rear‐stage three‐phase interleaved LLC resonant converter. To establish a single‐phase fundamental equivalent circuit for the rear‐stage converter, apply the fundamental wave analysis method, and it is essential for comprehending the impact of relevant system parameters on voltage gain characteristics and resonant operating regions. Conducting research on the two‐stage on‐board DC/DC converter's control strategy involves establishing small‐signal circuit models for both front and rear stage converters, derivation of parameters for double closed‐loop control, and determination of the control strategy employing phase‐shifted current sharing for the rear‐stage converter in cases where significant tolerance exists in resonant components. The simulation for a two‐stage on‐board DC/DC converter results indicates that under various conditions of resonant component tolerance, the converter is capable of achieving balanced phase currents and demonstrates minimal output current ripple prior to capacitor filtering. A 1.5‐kW experimental prototype has been fabricated, and the experimental findings indicate that the output voltage remains stable at 13.8 V despite fluctuations in input voltage. The highest efficiency of the prototype is about 96.27%, and the utilization of phase‐shifting current balancing control results in a notable reduction in output current ripple. This provides more evidence that the design of a two‐stage on‐board DC/DC converter is correct.

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Design of a High-to-Low Voltage, Low-Power, Isolated DC/DC Converter for EV Applications

Cited by 6 publications

References 17 publications

A Novel Non-Isolated High-Gain Non-Inverting Interleaved DC–DC Converter

A Novel Non-Isolated High-Gain Non-Inverting Interleaved DC–DC Converter

A modified configuration of high step‐up non‐isolated DC‐DC converter with low voltage stress: Analysis, design, and implementation

Research on Cascaded On‐Board DC/DC Converter Based on Three‐Phase Interleaved LLC

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