High step‐up dc‐dc converter based on the differential connection of basic converters and switched‐capacitor cells

Andrade, Jéssika Melo de; Coelho, Roberto F.; Lazzarin, Telles Brunelli

doi:10.1002/cta.3003

Cited by 9 publications

(6 citation statements)

References 38 publications

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“…Additionally, a converter topology based on the switched capacitors with zero current switching is founded in Abbasi et al 31 In recent literature, for high conversion gain, a SEPIC topology by making the differential connection with the basic boost and Cuk-based switched capacitor topology are presented in de Andrade et al 32 However, large volume, complex structure, and voltage regulation are the significant issues for those techniques.…”

Section: F I G U R E 2 Classification Voltage Boosting Techniquesmentioning

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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Section: F I G U R E 2 Classification Voltage Boosting Techniquesmentioning

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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“…Several converters are listed in the literature for the gain improvement of converters. In these converters, the CBC is integrated with various voltage boosting methodologies such as switched capacitor (SC) [8][9][10], switched inductor (SI) [11,12], active network (AN) based SC [13], active network (AN) based SI [14], and AN based SI and SC for the improvement of gain [15]. Later, coupled inductor (CI) based boost converters are developed.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Single Switch High Step-Up Quadratic DC-DC Converter With Switched Capacitor Cell

Sudarsan Reddy,

Golla,

Thangavel

2024

IEEE Access

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This article presents a single-switch high step-up quadratic DC-DC converter for DC microgrid applications. The quadratic boost converter is integrated with switched capacitor cell along with coupled inductor to achieve high gain at reduced duty ratio. The switched-capacitor cell is composed of two diodes and two capacitors. The capacitors charge in parallel and discharge in series to increase the converter's gain. The coupled inductor turn ratio can be increased to elevate the converter's gain further. The inductor at the input minimizes the current ripples and makes the input current to be continuous. Moreover, the proposed converter works as a passive clamp circuit to minimize large voltage spikes across the switch (MOSFET) and it has low Rds(on-state) to minimize the conduction losses. As a result, the device's rating improves, losses decrease, and it becomes less expensive to switching devices of the converter. The energy leakage of the coupled inductor is recycled to the output capacitor, it can reduce the reverse recovery issue in diodes and increases efficiency of converter further. The proposed converter working principle and its analysis are explained with different operating modes. The performance of the converter is validated with laboratory hardware setup with rating of 160W. Here, the input and output voltages are considered at 20V and 400V, respectively. Finally, the superiority of the proposed converter is compared with existing literature in terms of gain, stress across various components, switching performance and efficiency.

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“…Both isolated and non-isolated converters have their own merits and demerits, but from a micro source point of view, non-isolated converters are preferable because of their compactness, ease of control and improved efficiency. 11 The switched inductor 12 and switched capacitor 13,14 or integration of both into DC-DC converters is one of the prominent solutions to achieve impeccable voltage gains, but the duty ratios to retain this high voltage gain are extreme. So, in order to further boost the voltage gain to certain higher extents, auxiliary arrangements like diodecapacitor voltage lift, 15 voltage multipliers, and cascade connections 16,17 are used.…”

Section: Introductionmentioning

confidence: 99%

“…The switched inductor 12 and switched capacitor 13,14 or integration of both into DC‐DC converters is one of the prominent solutions to achieve impeccable voltage gains, but the duty ratios to retain this high voltage gain are extreme. So, in order to further boost the voltage gain to certain higher extents, auxiliary arrangements like diode‐capacitor voltage lift, 15 voltage multipliers, and cascade connections 16,17 are used.…”

Section: Introductionmentioning

confidence: 99%

Active switched‐capacitor based ultra‐voltage gain quadratic boost DC‐DC converters

Baba

Giridhar

Narasimharaju

2022

Circuit Theory & Apps

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This paper presents active switched capacitor integrated ultra-voltage gain quadratic boost converters (ASC-QBC). The step-up conversion ratio provided by quadratic boost converter is not ample to meet the renewable microsource applications. The active switched capacitor integrated quadratic boost converter is a propitious alternate to acquire high voltage conversion ratios. A simple diode-capacitor voltage lift arrangement is used in one of the introduced converters, thereby further enhancing the voltage gain and also reducing the input current ripple to a greater extent. The voltage stress on semiconductor devices is greatly alleviated with the aid of diode-capacitor voltage lift arrangement. The input current ripple aspects with green energy sources along with control feasibility of the proposed converters against input voltage and load perturbations are experimentally demonstrated for a power rating of 100 W.The theoretical analysis and performance indices of proposed converters are validated with a fabricated laboratory prototype.

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High step‐up dc‐dc converter based on the differential connection of basic converters and switched‐capacitor cells

Cited by 9 publications

References 38 publications

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

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

High-Performance Single Switch High Step-Up Quadratic DC-DC Converter With Switched Capacitor Cell

Active switched‐capacitor based ultra‐voltage gain quadratic boost DC‐DC converters

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