Analysis, Design, and Implementation of a ZVT High Step-Up DC–DC Converter With Continuous Input Current

Fani, Rezvan; Farshidi, Ebrahim; Adib, Ehsan; Kosarian, Abdolnabi

doi:10.1109/tie.2019.2960727

Cited by 27 publications

(13 citation statements)

References 23 publications

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“…However, in the active clamp circuit, the circulating current in the auxiliary circuit is high, so the conduction losses rise; thus, the efficiency decreases. Moreover, the Zero-Current-Transition (ZCT) and the Zero-Voltage-Transition (ZVT) are two commonly used methods of the soft switching active techniques, in which an auxiliary circuit with at least one power switch is attached to the converter to provide soft transition conditions [18]- [20]. In the ZVT technique, which used in the proposed converter, an auxiliary circuit is added to the converter, after the main switch, in parallel with the structure.…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up PWM Non-Isolated DC-DC Converter With Soft Switching Operation

et al. 2022

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A high step-up PWM non-isolated dc-dc converter with soft switching is proposed in this paper. The converter has minimum auxiliary elements to achieve high power density and high voltage gain. The ZVS operation of the main power switch results in negligible capacitive turn-on losses. Since the duty cycle of the auxiliary switch is narrow and its operation is under ZCS condition, the losses that the auxiliary circuit imposes are not significant. Also, all the diodes are operated under soft-switching conditions solving the reverse recovery problem. All the inductors are coupled on only one magnetic core, reducing size and conduction losses. Compared to the hard switched counterpart, the electromagnetic interference of the proposed converter is reduced. Furthermore, the output voltage of the proposed converter is controlled by an integral sliding mode control strategy during the load variations. Also, the proposed integral sliding mode control strategy has been compared with the PI control strategy, improving the transient response and the robustness under load variations while the switching frequency is constant. The effectiveness and accuracy of the proposed converter are verified by practical laboratory results which are obtained from a 250W prototype.

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Section: Introductionmentioning

confidence: 99%

A High Step-Up PWM Non-Isolated DC-DC Converter With Soft Switching Operation

et al. 2022

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“…In applications that galvanic isolation between low and high voltage sides is not required, non‐isolated converters are rather than isolated ones due to their simple topologies and control circuit. In these converters, coupled inductors are combined with other techniques to increase voltage gain [3–9]. One way to increase voltage gain is using voltage lift technique [3–6].…”

Section: Introductionmentioning

confidence: 99%

“…In these converters, coupled inductors are combined with other techniques to increase voltage gain [3–9]. One way to increase voltage gain is using voltage lift technique [3–6]. In [3], super‐lift technique was used to increase the voltage gain.…”

Section: Introductionmentioning

confidence: 99%

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Interleaved non‐isolated DC–DC converter for ultra‐high step‐up applications

Fani

Farshidi

Adib

et al. 2020

IET power electron.

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This study presents a novel interleaved non‐isolated converter for ultra‐high step‐up applications. This circuit utilises coupled inductor and voltage‐lift techniques to achieve high voltage gain. In the proposed converter, the configuration of interleaved technique and winding‐cross‐coupled inductors not only reduces the input current ripple and current stress of semiconductor devices but also increases the voltage gain. Further, using voltage‐lift technique helps to reach a very high voltage conversion ratio with low turn ratio and proper duty cycle. Since the voltage stress of semiconductor devices is low enough, low on resistance switches and low voltage ultra‐fast recovery diodes are used. For this converter, high voltage gain, low conduction losses, low reverse recovery losses, high efficiency, low input current ripple, small volume and reduced cost are provided. Therefore, the proposed converter is a good choice for ultra‐high step‐up applications. The implemented 100 W laboratory prototype circuit with 18 V input voltage and unity turn ratio of coupled inductors reaches 360 V output voltage and 94.7% efficiency which validates the accuracy of theoretical analysis.

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“…Despite the high voltage gain, an input current with high ripple is the main drawback of these converters. Moreover, in [13–15], new step‐up converters with continuous input current and very high voltage gain are suggested.…”

Section: Introductionmentioning

confidence: 99%