Single input, dual output high step‐up/down DC–DC converter with ripple‐free input current in the high current port and expandable number of output ports

Saadatizadeh, Zahra; Babaei, Ebrahim; Blaabjerg, Frede; Cecati, Carlo

doi:10.1049/iet-pel.2020.0674

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…Numerous voltage-boosting techniques are employed by conventional step-up structures to maintain adequate duty cycles and efficiency while maximizing voltage conversion ratios. These include voltage lift, switched capacitors (SC), voltage multipliers (VM), switched inductors (SL), interleaving, coupledinductors (CI), and cascading [5], [6], [9], [10], [11]. The topologies presented in [12], [13], and [14] use interleaved and CI techniques.…”

Section: Introductionmentioning

confidence: 99%

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

Imanlou,

Najmi,

Behkam

et al. 2023

IEEE Access

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This paper propounds a new high step-up DC-DC topology based on the active switchedinductor (A-SL) technique, which utilizes a coupled inductor (CI) for performance enhancement. Among the features of the presented topology are the following: (a) Better voltage gain (VG) and efficiency, (b) Since there are low voltages across power switches, it is possible to reduce the amount of power that is lost as a result of using MOSFETs with a low voltage rating and reduced internal resistance, (c) By reducing the turn ratio of the CI, the VG is enhanced, (d) Through the series connection of a capacitor with the CI primary winding, zero DC bias is achieved, and the core saturation problem is solved, (e) Input current division between input inductors and switches, (f) There is no limitation on duty cycle (0 < D < 1), and (g) Simple switching patterns and simultaneously driven switches. The propounded converter's operation principle and steadystate analysis are explained in detail, and parasitic elements' effects on VG and efficiency are examined. In addition, the VG, the number of components, and the voltage tension on power switches, diodes, and capacitors are compared and analyzed. An experimental laboratory prototype with 30V input and 400V output voltage is used to verify the validity of the study and the performance of the propounded topology.INDEX TERMS Active switched-inductor, coupled-inductor, DC-DC converter, high voltage gain.

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Section: Introductionmentioning

confidence: 99%

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

Imanlou,

Najmi,

Behkam

et al. 2023

IEEE Access

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“…Nowadays, global warming and air pollution caused by fossil fuels and their unreliable future supplies provide further impetus for researchers to discover alternative sources of harmful and non-renewable sources [1][2][3]. Fuel cells (FCs) are one of the alternative sources owing to their renewability and environmentally friendly characteristics [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

An extendable soft‐switched high step‐up converter with near zero‐ripple input current suitable for fuel cell‐powered applications

Dezhbord

Babalou

Mohseni

et al. 2022

IET Renewable Power Gen

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In this paper, an extendable high step‐up topology is presented for the low input voltage applications, that is, fuel cell (FC) source. The proposed converter eliminates the pulsating input current and reduces the high input current ripple. Thus, the lifetime of this non‐linear source and energy flow is significantly improved. The high output voltage is achieved by using voltage multiplier cells (VMC) and a coupled inductor (CI) with reduced elements. Moreover, an auxiliary circuit is applied due to restoring the energy of leakage inductance in the CI. Therefore, not only all power switching devices are turned on under zero voltage switching (ZVS) but also the input current ripple is remarkably reduced to zero. Furthermore, normalized semiconductors’ voltage stresses are diminished. The reverse recovery problem of diodes and their turn‐off power losses at high frequencies are alleviated owing to their zero current switching (ZCS) turn‐off. In this paper, the performance of the proposed structure is investigated and compared with the traditional converters considering their voltage gain and voltage stress. Eventually, a 500‐W prototype of the proposed converter is built and tested to validate mathematical analyses.

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A New Soft‐Switched Trans‐Inverse Step‐Up DC/DC Converter With Zero Input Current Ripple

Hasanpour

2024

Energy Science & Engineering

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In this article, a new single‐switch high step‐up DC/DC converter with soft‐switching performance is presented for sustainable energy applications. In this circuit, zero input current ripple is obtained at a small value of the input inductance. Therefore, the ohmic loss of the input inductor will be significantly alleviated. Also, a three‐winding coupled‐inductor (TWCI) and a voltage multiplier are merged in this topology to achieve high voltage gain with an appropriate duty cycle. Semi‐trans‐inverse specification of this circuit makes it possible to achieve high output voltages under a lower magnetic turns ratio, which leads to power loss reduction. Moreover, a regenerative clamp recycles the leakage energy to the output and also mitigates the maximum voltage stress across the power switch. In addition, to help further efficiency improvement, a resonant tank with a quasiresonant performance between the middle capacitors and the leakage inductance of the TWCI is adopted to decrease the power dissipations of the switching components. The operating principle and steady‐state analysis of the introduced converter are described in detail. To verify the superiority of the presented circuit, a comparison with relevant converters is provided. Eventually, the theoretical analysis was verified by a 300‐W experimental prototype.

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Single input, dual output high step‐up/down DC–DC converter with ripple‐free input current in the high current port and expandable number of output ports

Cited by 6 publications

References 28 publications

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

A New High Voltage Gain Active Switched-Inductor Based High Step-Up DC–DC Converter With Coupled-Inductor

An extendable soft‐switched high step‐up converter with near zero‐ripple input current suitable for fuel cell‐powered applications

A New Soft‐Switched Trans‐Inverse Step‐Up DC/DC Converter With Zero Input Current Ripple

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