A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

Heris, Pedram Chavoshipour; Saadatizadeh, Zahra; Sabahi, Mehran; Babaei, Ebrahim

doi:10.1002/cta.2606

Cited by 29 publications

(9 citation statements)

References 33 publications

(114 reference statements)

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“…One of the choices to provide high voltage step-down conversion ratios without choosing extremely narrow duty cycles in recent years is switched-capacitor/inductor-based DC-DC buck converters. By adding switched-capacitor, switched-inductor, or a combination of these elements, the gain of the buck converters could be improved to a considerable level [10][11][12]. In [13], employment of valley-fill switched capacitor is studied that enhances step-down ratio and meanwhile decreases the voltage stress of the power switched.…”

Section: Introductionmentioning

confidence: 99%

An interleaved high step‐down coupled inductor based quadratic DC‐DC converter

Pashaie

Sabahi

Babaei

2023

IET Power Electronics

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A high step‐down direct current‐direct current (DC‐DC) buck converter with a coupled‐inductor in its topology is presented in this study. The switching pattern of the proposed converter is interleaved; therefore, the voltage stress on the semiconductors and the components is low since the primary high voltage will be divided between the blocking capacitors on the primary side. Thus, the voltage stress on semiconductor elements will be low. As a result, the preselected elements can be chosen with low voltage ratings. In addition, there are cells with coupled inductors utilized in the structure that helps the converter to provide improved voltage gain in its output terminal. Typically, narrow duty cycles are needed to achieve high gain in conventional buck converters, but the proposed converter has obtained a high conversion ratio even with wider duty ratios. Besides, the proposed converter has a constant equation for the voltage gain for the whole range of duty cycles. Theoretical analysis and comparison with other recent converters of similar types have been conducted to demonstrate the proposed converter performance. Furthermore, to verify the theoretical analysis, a 600 W prototype of the proposed converter with 820 V/30 V is implemented, and experimental results are presented.

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Section: Introductionmentioning

confidence: 99%

An interleaved high step‐down coupled inductor based quadratic DC‐DC converter

Pashaie

Sabahi

Babaei

2023

IET Power Electronics

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“…3,4 Interleaved boost converters (IBC) are also suffered with high voltage stress and reverse recovery problem, but input current ripples are less. 5 After, inserting voltage multiplier cells such as switched capacitor (SC), [6][7][8] switched inductor (SL), 9 SC/SL, 10 and active network with SC, SL in the boost converter produces moderate gain. [11][12][13] The IBC with SC or voltage multiplier circuit (VMC) produces moderate voltage gain with reduced input current ripples as well as current stress of the switches.…”

Section: Introductionmentioning

confidence: 99%

A non‐isolated high step up interleaved boost converter with coupled inductors

Reddy¹,

Subbaiyan²

2022

Circuit Theory & Apps

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Summary In this article, a high step‐up interleaved boost converter topology is proposed for renewable energy applications. The proposed converter utilizes two‐phase interleaved configuration, to increase the power capability of converter while reducing the input current ripples. The output side formation enhances the voltage gain with the help of coupled inductors. It produces high voltage conversion ratio with least voltage stress on the switches. The switches are relieved from the voltage spikes by reclaim the energy leakage of the coupled inductors, which minimizes reverse recovery problem in diodes. The conduction losses of the switches are reduced due to small on state resistance. Finally, a prototype of 200 W proposed converter is developed in the laboratory to verify the both theoretical analysis and simulation results.

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“…Further, in Prabhala et al, 28 a dual input boost converter based on switched capacitor with VMCs is developed for connecting the two PV inputs. With the addition of diode‐capacitor cells at the output side of a transformerless DC‐DC converter, high voltage conversion is achieved in Chavoshipour Heris et al 29 At the input‐side switched inductors are used as a magnetic element for energy transfer to the output. However, this topology utilized more components to get higher voltage conversions.…”

Section: Introductionmentioning

confidence: 99%

A non‐isolated high gain DC‐DC converter with coupled‐inductor and built‐in transformer for grid‐connected photovoltaic systems

Kokkonda

Kulkarni

2022

Circuit Theory & Apps

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A non‐isolated high gain DC‐DC converter based on coupled‐inductor (CI) and built‐in transformer (BT) with voltage multiplier cell (VMC) is presented for renewable energy applications, especially solar photovoltaic (PV) sources. In this circuit, the BT used in addition to the coupled inductor improves the design flexibility. It enhances the voltage gain with the simultaneous action of CI and BT, compared to converters that include BT or CI. Also, the formation of voltage multiplier cell with the series combination of secondary windings of the CI and BT, switched capacitors and the diodes give an extra voltage gain to the converter. This converter structure adds the turns ratios in voltage gain expression and does not entail a reverse recovery issue with the leakage energy. The active clamped circuit recycles this leakage energy to alleviate the switching stresses. Consequently, active clamping provides add‐on features like improved converter efficiency with ZVS operation and further voltage gain. The converter principle of operation and the design procedure of all components are presented. Finally, a 400 W laboratory prototype with input voltage range 24–40 V and output 400 V is developed and illustrated the effectiveness of the converter at a switching frequency of 100 kHz.

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A new switched‐capacitor/switched‐inductor–based converter with high voltage gain and low voltage stress on switches

Cited by 29 publications

References 33 publications

An interleaved high step‐down coupled inductor based quadratic DC‐DC converter

An interleaved high step‐down coupled inductor based quadratic DC‐DC converter

A non‐isolated high step up interleaved boost converter with coupled inductors

A non‐isolated high gain DC‐DC converter with coupled‐inductor and built‐in transformer for grid‐connected photovoltaic systems

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