Non-Isolated DC–DC Power Converter With High Gain and Inverting Capability

Meraj, Mohammad; Bhaskar, Mahajan Sagar; Reddy, B. Prathap; Iqbal, Atif

doi:10.1109/access.2021.3074459

Cited by 26 publications

(12 citation statements)

References 30 publications

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“…Several existing low-power renewable resources have high power to voltage ratio and therefore require a voltage boosting stage [4], [5]. The conventional boost converter (CBC) is most commonly used for this purpose due to its simple circuit and available comprehensive analysis [2].…”

Section: Introductionmentioning

confidence: 99%

“…Due to low cost, size, and efficiency, non-isolated converters are frequently preferred in low-power systems [6]. Many existing non-isolated VOLUME 10, 2022 converters achieve high voltage gain ratios by increasing the voltage multiplier cells [4], [5], using coupled inductors with high turns ratios or with switched capacitor [13], [14] or inductor modules [15]- [17]. Though transformer-based or coupled-inductor-based high-gain converters have several advantages, the presence of magnetic elements with strict design constraints degrades its structural simplicity [10], [18].…”

Section: Introductionmentioning

confidence: 99%

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Two-Switch Boost Converter With Improved Voltage Gain and Degree of Freedom of Control

et al. 2023

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The use of renewable resources for low power generation has led to extensive research on power converters for reliable and efficient power conversion. Though conventional boost converter (CBC) remains the widely used topology, its operating range is limited due to constraints on voltage gain and degree of freedom of control (DoFoC). This paper presents a two-switch boost converter (TSBC) which improves the voltage gain and DoFoC by cascading an additional switch-diode pair to the CBC circuit. The additional switch enhances the range of voltage gain without operating CBC at high duty ratios. Additionally, TSBC offers more choices to adjust voltage gain, which enhances DoFoC. The switching interval selection is detailed considering the voltage gain and constraints on circuit variables. The design formulations of TSBC are examined to facilitate optimal choice of components. The features of TSBC are theoretically established with mathematical derivations and are validated by simulations and experiments. The experimental results indicate that for a duty ratio of 0.7 for the existing switch of CBC, an increase in voltage gain from 3.2 to 4.3 is achieved when the duty ratio of the additional switch in TSBC is varied from 0 to 0.1. Similarly, improved DoFoC is demonstrated with inductor current control as well as with constant ripple ratios while maintaining the required output voltage. The proposed converter can easily replace the commonly CBC to improve the gain and DoFoC by simply cascading a switch-diode pair at the input-side of CBC. INDEX TERMS Boost converter, cascaded topology, degree of freedom, voltage gain, ripple ratioThis article has been accepted for publication in IEEE Access.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Switch Boost Converter With Improved Voltage Gain and Degree of Freedom of Control

et al. 2023

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“…The voltage gain is low and insufficient. Therefore, new high gain topologies are required [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

An ultra high step‐up DC‐DC converter based on VMC, POSLLC, and boost converter

Mahdizadeh

Gholizadeh

Shahrivar

et al. 2022

IET Power Electronics

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In this article, an ultra‐high step‐up DC‐DC converter has been proposed. The topology of the converter is a combination of a cascaded boost converter, positive output super lift Luo converter (POS LLC), and a voltage multiplier cell (VMC). The lower values of the duty cycle provide a more than 10 times voltage gain. Consequently, the high voltage gain has been provided beside the lower value of the voltage/current stress of the semiconductor and an acceptable value of the efficiency. With a detailed look, it can be understood the voltage gain and efficiency of the converter have become 12 times and 90.5% based on the experimental results while the percentage of the duty cycle has become 50%. Moreover, by the mentioned percentage of the duty cycle, the normalized value of the voltage/current stress of the semiconductors has become lower than 50% by exception of only 3 semiconductor‐based components which have voltage/current stresses more than 50% and lower than the unity. In addition to all the mentioned advantages, the input current has remained continuous which solves the challenges of the input filter's capacitor. Moreover, the voltage/current stresses have been kept low‐valued. The ideal mode of the topology has been discussed for both continuous/discontinuous current modes. The non‐ideal mode of the topology and its related comparisons have been done. A comparison of the voltage/current stresses of the semiconductor‐based components has been done. Moreover, the comparison of the losses and efficiency have been done for the proposed converter and recently suggested topologies. In addition, the efficiency has been discussed for the different values of its effective factors and the resulted behavior has been expressed. Finally, the simulation and experimental outcomes have been extracted for a 120 W output power and compared with the theoretical relations' results.

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“…Therefore, the load will be protected from happening faults on the input side [10]. However, the switches of this kind of converter suffer from high current stresses due to the current inertia of the leakage inductance [11]. Such a shortage can be solved by applying snubber circuits which increase the number of elements [12].…”

Section: Introductionmentioning

confidence: 99%

“…In this kind of converters, switching of switches copies the voltage in parallel connected capacitors and then, the series connection of capacitors results in a high output voltage. However, the parallel switching of capacitors causes inrush currents that the semiconductors suffer from the resulted current stress [8,11,12,14].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of a High Step-Up DC-DC Converter Based on the Conventional Boost and Buck-Boost Converters with High Value of the Efficiency Suitable for Renewable Application

et al. 2021

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This paper introduces a novel topology of the proposed converter that has these merits: (i) the topology of the converter is based on conventional boost and buck-boost converters, which has caused its simplicity; (ii) the voltage gain of the converter has provided higher values by the lower value of the duty cycle; (iii) due to the use of high-efficiency conventional topologies in its structure, the efficiency of the converter keeps its high value for a great interval of duty cycle; (iv) besides the increase of the voltage gain, the current/voltage stresses of the semiconductors have been kept low; (v) the continuous input current of this converter reduces the current stress of the capacitor in the input filter. It is worth noting that the proposed converter has been discussed in both ideal and non-ideal modes. Moreover, the operation of the converter has been discussed in both continuous/discontinuous current modes. The advantages of the converter have been compared with recently suggested converters. In addition, the different features of the converter have been discussed for different conditions. In the small-signal analysis, the appropriate compensator has been designed. Finally, the simulation and experimental results have been reported for 90 W output power, 90 V output voltage, 3-times voltage gain, and 100 kHz switching frequency.

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Non-Isolated DC–DC Power Converter With High Gain and Inverting Capability

Cited by 26 publications

References 30 publications

Two-Switch Boost Converter With Improved Voltage Gain and Degree of Freedom of Control

Two-Switch Boost Converter With Improved Voltage Gain and Degree of Freedom of Control

An ultra high step‐up DC‐DC converter based on VMC, POSLLC, and boost converter

Design and Implementation of a High Step-Up DC-DC Converter Based on the Conventional Boost and Buck-Boost Converters with High Value of the Efficiency Suitable for Renewable Application

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