A new nonisolated soft switched
            <scp>DC‐DC</scp>
            bidirectional converter with high conversion ratio and low voltage stress on the switches

An ultra-high gain DC-DC converter with single-switch structure is introduced in this paper. Full soft-witching is provided by simultaneous use of quasi-resonant performance of one resonant tank and leakage inductance of a three-winding coupled inductor (CI). Adopting the secondary and tertiary windings of the CI in separated voltage multiplier cells enables the converter to provide ultra-high voltage gain. The reverse recovery problem is resolved thanks to the quasi zero current switching performance of nearly all diodes, especially output diode because of the second resonant tank, so the total electromagnetic interference is significantly reduced. Continuous input current with low ripple expands the application of the proposed converter, especially in renewable energy applications. Steady-state performance and design considerations of the introduced converter are analyzed thoroughly and compared with recently introduced converters to establish its merits. Experimental results of a 200 W prototype are given to validate its analysis and performance.INDEX TERMS DC-DC power converter, Coupled inductor, full soft-switching, single switch structure, ultra-high step-up converter.

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“…Voltage of capacitor C5 (VC5) that is defined in ( 11) can be calculated by using (20), (23), and (25):…”

Section: B Steady-state Analysismentioning

confidence: 99%

Single-Switch Resonant Soft-Switching Ultra-High Gain DC-DC Converter With Continuous Input Current

et al. 2022

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“…A high voltage conversion ratio can be achieved by a classical boost, a switched-capacitor, a cascaded boost, and switched-inductor topologies. Due to diode reverse recovery currents problems, these converters have some restrictions, which reduce the converter efficiency [6,9]. e classical boost DC-DC converter is a low-cost solution for voltage boosting.…”

Section: Introductionmentioning

confidence: 99%

Presenting of the Magnetic Coupling-Based Transformer-Less High Step-Up DC-DC Converter for Renewable Energy Applications

Shayeghi

Pourjafar

Hashemzadeh

et al. 2022

International Transactions on Electrical Energy Systems

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This study presents a new high step-up converter based on the voltage multiplier cell and coupled inductor for renewable energy applications such as fuel cell and photovoltaic power systems. This converter achieves a high voltage conversion ratio using a coupled inductor and voltage multiplier cell (VMC). The voltage multiplier cell acts as a passive clamp circuit and reduces the maximum voltage across the power switch. The suggested topology has only one power switch in its structure, which leads to low cost and volume. The other benefits of the proposed structure are low components count, low input current ripple, low voltage stress throughout the semiconductors, high efficiency, zero-current switching (ZCS), and zero-voltage switching (ZVS) of diodes. Besides, due to the soft-switching condition of the diodes, the reverse recovery problem can be decreased. To show the effectiveness of the suggested topology, operation survey, steady-state analysis, and efficiency calculation are provided. Additionally, the comparison study with other similar converters illustrates the superiority of the proposed structure. Finally, an experimental prototype with 150 W rated power, 50 kHz switching frequency, and 24 V input voltage is implemented to prove the mathematical analysis and effectiveness of the proposed DC-DC converter.

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“…They operate as the boost and buck converters in the forward and reverse power flow, respectively. There are two exceptions in which diodes are also used in the bidirectional NHSDCs: (i) as snubber or clamp circuit components [133,136,137,213], and (ii) as components operate only in one power transfer direction [145,229]. Based on Table I, the highest number of switches belongs to the bidirectional converters; a bidirectional converter with an active resonant network in [204], a three-phase interleaved bidirectional converter in [205], and a bidirectional converter with a SC cell and a quasi Z-source network in [237].…”

Section: B Unidirectional-bidirectional Power Flowmentioning

confidence: 99%

“…8) Since N usually appears as a linear combination in the numerator of the voltage gain equations, most of the profiles in Figs. 16(e) and (f) are linear, except [59,72,86,89,133]. As mentioned earlier, in order to keep the uniformity of figures, N is defined as the secondary to the primary winding turns ratio of the coupled inductors or built-in transformers, which is reciprocal in [59,72,86,98,220].…”

Section: B Operational Features a Steady State Voltage Gainmentioning

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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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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A new nonisolated soft switched DC‐DC bidirectional converter with high conversion ratio and low voltage stress on the switches

Cited by 12 publications

References 19 publications

Single-Switch Resonant Soft-Switching Ultra-High Gain DC-DC Converter With Continuous Input Current

Single-Switch Resonant Soft-Switching Ultra-High Gain DC-DC Converter With Continuous Input Current

Presenting of the Magnetic Coupling-Based Transformer-Less High Step-Up DC-DC Converter for Renewable Energy Applications

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

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