A Family of Transformerless Quadratic Boost High Gain DC-DC Converters

Zaid, Mohammad; Lin, Chang‐Hua; Khan, Shahrukh; Ahmad, Javed; Tariq, Mohd; Mahmood, Arshad; Sarwar, Adil; Alamri, Basem; Alahmadi, Ahmad Aziz

doi:10.3390/en14144372

Cited by 28 publications

(11 citation statements)

References 31 publications

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“…All components have a voltage stress lower than the output voltage. This is The steady state voltage of capacitor C 1 is obtained from ( 1) and (2).…”

Section: Mode IImentioning

confidence: 99%

“…However, for photovoltaic (PV) energy systems, a step-up dc/dc boost converter is mandatory to boost the low voltage to higher level to enable grid integration or supply power to an islanded load, see Figure 1. In most of the practical cases, the converter is configured to generate output voltage around 400 V, with input voltage only ranging from 18 to 50 V [1][2][3][4]. In ideal scenarios, the voltage gain of the classical boost converter is infinite.…”

Section: Introductionmentioning

confidence: 99%

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New High-Gain Transformerless DC/DC Boost Converter System

2022

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This article proposes a new high-gain transformerless dc/dc boost converter. Although they possess the ability to boost voltage at higher voltage levels, converter switching devices are under low voltage stress. The voltage stress on active switching devices is lower than the output voltage. Therefore, low-rated components are used to implement the converter. The proposed converter can be considered as a promising candidate for PV microconverter applications, where high voltage-gain is required. The principle of operation and the steady-state analysis of the converter in the continuous conduction mode are presented. A hardware prototype for the converter is implemented in the laboratory to prove the concept of operation.

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“…All components have a voltage stress lower than the output voltage. This is The steady state voltage of capacitor C 1 is obtained from ( 1) and (2).…”

Section: Mode IImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New High-Gain Transformerless DC/DC Boost Converter System

2022

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“…A voltage doubler circuit such as Cockroft-Walton can be used to increase the output voltage [26], and it reduces the voltage stress across the switch. Additionally, the VL technique is used in [25][26][27][28] with a voltage doubler. A non-isolated DC-DC converter based on the VL technique was used to obtain a negative voltage concerning the ground [29].…”

Section: Renewablementioning

confidence: 99%

A High Step-up DC-DC Converter Based on the Voltage Lift Technique for Renewable Energy Applications

et al. 2021

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High gain DC-DC converters are getting popular due to the increased use of renewable energy sources (RESs). Common ground between the input and output, low voltage stress across power switches and high voltage gain at lower duty ratios are desirable features required in any high gain DC-DC converter. DC-DC converters are widely used in DC microgrids to supply power to meet local demands. In this work, a high step-up DC-DC converter is proposed based on the voltage lift (VL) technique using a single power switch. The proposed converter has a voltage gain greater than a traditional boost converter (TBC) and Traditional quadratic boost converter (TQBC). The effect of inductor parasitic resistances on the voltage gain of the converter is discussed. The losses occurring in various components are calculated using PLECS software. To confirm the performance of the converter, a hardware prototype of 200 W is developed in the laboratory. The simulation and hardware results are presented to determine the performance of the converter in both open-loop and closed-loop conditions. In closed-loop operation, a PI controller is used to maintain a constant output voltage when the load or input voltage is changed.

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“…In article [5] a new cascade approach is used to obtain high gain, lower switch voltage stress, and lower conduction losses. Switched inductor [6][7][8][9][10][11], switched capacitor [12][13][14][15], multilevel and interleaved are some of the well-known and accepted approaches. The high voltage is obtained by combining a switched inductor with a switched capacitor cell, as shown in [12], although the converter is only suited for floating loads.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of semiconductor voltage stress and power density, another boosting technology, such as high step-up converters [13][14][15] using switched inductor with capacitor (SC) voltage multiplier, outperforms semiconductor voltage stress and power density. The input source charges the capacitor in the circuit when the switch is on, and the stored energy is discharged when the switch is off, resulting in a greatly increased voltage conversion ratio.…”

Section: Introductionmentioning

confidence: 99%

Ultra high gain step up DC/DC converter based on switched inductor and improved voltage lift technique for high‐voltage applications

Khan

Zaid

Siddique

et al. 2022

IET Power Electronics

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Voltage lift is a well‐known technique to improve the voltage gain of the converter. A combination of switched inductor and the conventional voltage lift technique can be used to achieve high gain, but the semiconductor's stress is still high. An improved voltage lift technique by employing an extra diode and capacitor and a switched inductor is proposed, which significantly increases the voltage boosting factor and reduces the voltage stress of semiconductor devices. The proposed converter is transformerless and non‐isolated in nature. The proposed topology has a continuous input source current and has a common connection between the source and the load. The converter is controlled by a single switch, making it simple to use. The steady‐state relations are drawn out in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The effect of the unequal inductance on the voltage gain is carried out in detail. The improved voltage lift technique can develop the n‐stage converter to improve voltage gain further and reduce stress on semiconductors. The proposed topology is compared with the recent converters, and the effect of the non‐idealities on the voltage gain and losses occurring in the components is discussed in detail. A hardware prototype with a rating of 20V/300V, 250 W is built to test the suggested topology's performance and theoretical analysis. At a 20‐V input, the highest efficiency was measured to be 95.8%.

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A Family of Transformerless Quadratic Boost High Gain DC-DC Converters

Cited by 28 publications

References 31 publications

New High-Gain Transformerless DC/DC Boost Converter System

New High-Gain Transformerless DC/DC Boost Converter System

A High Step-up DC-DC Converter Based on the Voltage Lift Technique for Renewable Energy Applications

Ultra high gain step up DC/DC converter based on switched inductor and improved voltage lift technique for high‐voltage applications

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