Ultra-High Step-Up Interleaved Converter With Low Voltage Stress

Seo, Sang-Wha; Ryu, Joon-Hyoung; Kim, Yong; Lee, Jae-Bum

doi:10.1109/access.2021.3061934

Cited by 14 publications

(5 citation statements)

References 27 publications

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“…In addition, parasitic components and electromagnetic interference (EMI) are coped better in CG topologies. However, there are still industrial applications such as power supplies with floating ground (FG) structures, which are usually resulted by the presence of a voltage quadrupler [22,43], a VMC [26,52,70,77,157 [80,165,176,187,188,198], and a coupled inductor [100,103,129]. In this paper, the NHSDCs are investigated, and they are categorized according to their common or floating ground structure in Table II.…”

Section: E Grounding (Gnd)mentioning

confidence: 99%

“…According to the discussion, the NHSDCs are classified into four groups in Table IV with regards to their stages. It is worth mentioning that, in some literature, multistage and interleaving [206], multistage and multilevel [17, 57c, 68, 84, 88, 92, 94, 97, 120, 128, 139, 147], interleaving and multilevel [16,18,19,44,64,70,73,77,81,85,96,107,132,149,150,157,162,166,167,174,184,185,194,205], and all of the three styles [105,211] are utilized simultaneously. In addition, the best and the worst performance of these connection styles are presented with respect to ISGC, ISGW and ISGS in Table III.…”

Section: F Stagesmentioning

confidence: 99%

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Nonisolated High Step-Up DC–DC Converters: Comparative Review and Metrics Applicability

Tarzamni

Gohari

Sabahi

et al. 2024

IEEE Trans. Power Electron.

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Due to the extensive role of non-isolated high step-up DC-DC converters (NHSDC)s in industrial applications and academic research, many of these pulse width modulation converters have been presented in recent years. For each of these NHSDCs, some claims are introduced to verify its capabilities and features, which has been investigated in some review papers with different frameworks. Dissimilar to previous review papers, which have focused on the classification and derivation of voltage boosting techniques, this paper aims to evaluate the converters from various topological and operational points of view, and determine the superiority of each technique and converter according to applications. Some of these metrics are voltage gain, stresses, ripple, cost, power density, weight, size, control complexity and components count which lead to a comprehensive comparative study. Then, as the main purpose of this paper, effectiveness of these metrics is assessed to show how well they can lead us to the fair comparison results. Moreover, some new figures of merit are proposed in this paper to provide a helpful guideline in power electronic converters comparison studies. Finally, the feasibility discussion of single-and multi-objective figures of merit is followed by general practical conclusion and outlook about the NHSDC structures.

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Section: E Grounding (Gnd)mentioning

confidence: 99%

Section: F Stagesmentioning

confidence: 99%

Nonisolated High Step-Up DC–DC Converters: Comparative Review and Metrics Applicability

Tarzamni

Gohari

Sabahi

et al. 2024

IEEE Trans. Power Electron.

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“…The challenge is now to provide converters solving the disadvantages of the CIBC while maintaining its key advantages such as interleaved operation, low input current ripple and low number of components. The accomplished works in the state‐of‐the‐art can be classified into three categories named as transformer‐less converters with voltage multiplier cells (VMC), converters assisted with coupled inductors (CI) and/or built‐in transformer (BIT) and soft switching converters [4–30].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the common source-load ground is lost which results in leakage current from PV to be easily circulated in the converter. To increase the voltage gain, stacked output capacitors can be adopted in which some of the output capacitors are supplied through the VMCs [12][13][14]. However, balancing of the output capacitors during load changes should be taken into account that complicates the developed controller.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of a zero‐voltage switching interleaved high step‐up DC–DC converter with low‐voltage stresses

Nouri

2023

IET Power Electronics

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This paper proposes a novel interleaved ultra‐large gain zero‐voltage switching (ZVS) DC–DC converter for renewable energy systems. By using coupled inductor (CI) and built‐in transformer (BIT), a high‐voltage gain is achieved. The secondary windings of the CIs are connected in series with the primary winding of the BIT and the secondary winding of the BIT is inserted in voltage multiplier cell (VMC). In such a case, the voltage gain is proportional to the multiplication of the turn's ratios of the CI and BIT. To increase the devices’ utilization, the active clamp circuit not only provide ZVS performance for the metal‐oxide‐semiconductor field‐effect transistor (MOSFETs) and recycles the leakage energy, but also participates in voltage gain enhancement. The voltage stress across the switches is considerably decreased and the low duty cycle reduces the conduction and switching losses. Low input current ripple, equal current sharing without a dedicated controller and common ground are the other merits of the proposed converter. Steady‐state analyses are presented and through a fair comparison, the superiority of the proposed converter over the state‐of‐the‐art is guaranteed. Finally, a 500‐W laboratory prototype with 20‐ to 400‐V voltage conversion is built to demonstrate the effectiveness of the proposed converter.

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“…Besides, the high step-up dc-dc converters are widely used in many applications such as fuel cells, batteries, servo motors, etc. [5]- [8].…”

Section: Introductionmentioning

confidence: 99%

Interleaved Ultra-High Step-Up DC-DC Converters With Extendable Voltage Gains and ZVS Performance

et al. 2021

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This paper introduces eight novel interleaved non-isolated dc-dc converters with ultra-high step-up and zero voltage switching (ZVS) capabilities for renewable energy systems. To increase the voltage gain, the proposed converters benefit coupled inductors, high-frequency (HF) transformer, and voltage multiplier (VM) techniques. In comparison to other converters, which just benefit coupled inductors or HF transformers, these combinations of the techniques make an additional degree of freedom to achieve high voltage gains (more than 25 without extreme duty cycle). Besides, two active clamp circuits, including two stages of switch-capacitor VM cells, not only increase the voltage gain of the proposed converters but also act as an auxiliary circuit to provide ZVS. Moreover, the stored energy in the leakage inductances is absorbed and passed to the output by the clamp capacitors. The input current ripple is reduced by applying the interleaved technique. The voltage stress es across the power switches are clamped to lower values and can be controlled by the turn ratios of the coupled inductors and the HF transformer. The theoretical performance of the proposed converters is fully explained. Also, the proposed converters are compared with more than twenty latest interleaved high step-up and ultra-high step-up dc-dc converters. Finally, a 1 kW, 20 V/500 V laboratory prototype is built to prove the advantages of the proposed converters.INDEX TERMS Interleaved structure, dc-dc converter, ultra-high step-up converter, zero-voltage switching

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Ultra-High Step-Up Interleaved Converter With Low Voltage Stress

Cited by 14 publications

References 27 publications

Nonisolated High Step-Up DC–DC Converters: Comparative Review and Metrics Applicability

Nonisolated High Step-Up DC–DC Converters: Comparative Review and Metrics Applicability

Performance improvement of a zero‐voltage switching interleaved high step‐up DC–DC converter with low‐voltage stresses

Interleaved Ultra-High Step-Up DC-DC Converters With Extendable Voltage Gains and ZVS Performance

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