Analysis, modeling, and implementation of a new transformerless semi‐quadratic Buck–boost DC/DC converter

Hasanpour, Sara; Mostaan, Ali; Baghramian, Alfred; Mojallali, Hamed

doi:10.1002/cta.2620

Cited by 31 publications

(33 citation statements)

References 29 publications

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“…In total, 22 different converters are derived, which can control the output voltage by adjusting the duty ratio. Among them, nine converters are conventional cascaded converters; five converters have a voltage gain equal to the traditional buck‐boost converter, and four converters can produce quadric voltage gain 34‐36 . The remaining four new converters are derived by the component selection approach and are presented in this work.…”

Section: Component Selection Approachmentioning

confidence: 99%

New family of transformer‐less quadratic buck‐boost converters with wide conversion ratio

Naresh

Peddapati

2021

Int Trans Electr Energ Syst

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Section: Component Selection Approachmentioning

confidence: 99%

New family of transformer‐less quadratic buck‐boost converters with wide conversion ratio

Naresh

Peddapati

2021

Int Trans Electr Energ Syst

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“…Converter operation is assumed to be in CCM and small-signal model of the proposed converter is developed using state-space averaging method [29][30][31][32]. All elements are assumed to be ideal and parasitic values are neglected for simplicity in developing the transfer function of the converter.…”

Section: Modelling Of the Proposed Quadratic Quadrupler Boost (Q2b) Cmentioning

confidence: 99%

Coupled‐inductor‐based high‐gain converter utilising magnetising inductance to achieve soft‐switching with low voltage stress on devices

Upadhyay

Kumar

Sathyan

2020

IET Power Electronics

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This work proposes a soft-switched quadratic quadrupler boost converter with high voltage step up gain and low voltage stress on devices. With this converter topology, high voltage gain is achieved at low duty ratio operation of MOSFETs and few number of turns in coupled inductor. Operation at low duty ratio keeps boost converter gain in linear region and smaller number of turns in coupled inductor reduces the lossy part of the winding. Further, the magnetising inductance of coupled inductor is utilised to achieve zero voltage switching of MOSFETs to minimise the switching loss. In addition, secondary side diodes are operating under zero current switching conditions using resonance between leakage inductance and the capacitors of voltage quadrupler circuit. This greatly reduces the reverse recovery losses of the secondary side diodes. A detailed analysis of converter dynamics is discussed in one of the subsections to find out small-signal transfer functions with respect to variations in input voltage and duty ratio variation of MOSFETs. A 250 W prototype of the proposed converter is built and tested in laboratory with a maximum efficiency of ∼93% at 175 W output power.

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“…In the above equations Δ i L 1 , Δ i L 2 and Δ i L 3 are 20% 21 of i L 1 , i L 2 and i L 3 , respectively, and therefore, the calculated inductor values are L 1 = 164.8 μH, L 2 = 781 μH and L 3 = 3387.9 μH. Similarly, the rating of capacitors C 1 , C 2 and C 3 of IQBC is calculated using Equations 20–22:

C_{1} = \frac{((), 1 - δ) I_{0} δ}{((), 1 - 2 δ) {∆ V}_{C 1} f_{s}},

C_{2} = \frac{((), 1 - δ) I_{0} δ}{((), 1 - 2 δ) {∆ V}_{C 2} f_{s}},

C_{3} = \frac{((), 1 - δ) I_{0} δ}{((), 1 - 2 δ) {∆ V}_{C 3} f_{s}} .

…”

Section: Design Of Passive Componentsmentioning

confidence: 99%

Performance improvement of solar PV power conversion system through low duty cycle DC‐DC converter

Alagu¹,

Prem²,

Sivaraman³

et al. 2020

Circuit Theory & Apps

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Characteristics like reliability and modularity of solar photovoltaic (SPV) units makes them one of the apt options for generating electric power. However, the input intermittency is their major lacuna, and power electronic circuits are being used to nullify this effect. A solar photovoltaic power conversion process includes a DC-DC converter in the plant side to deliver a fixed DC voltage and a DC-AC converter in the grid side for converting DC voltage in to grid compatible AC voltage. The high duty ratio of typical DC-DC boost converters limits the switching frequency and efficiency. In this article, a way to enhance the performance of a SPV unit using an improved quadratic boost converter (IQBC) is analysed. It can deliver a higher output voltage at lower duty ratio with Perturb and Observe (P&O) algorithm-based Maximum Power Point Tracking (MPPT). A 250 W prototype of IQBC-based Solar PV power conversion system (SPVPCS) is developed, and its performance is compared against conventional and quadratic boost converters and found that the IQBC-based solar power conversion system is efficient and the results are presented. K E Y W O R D S boost converter, duty ratio, improved quadratic boost converter, solar PV conversion, system, voltage gain 1 | INTRODUCTION Renewable energy resources are getting much importance nowadays due to wider exploitation of fossil fuels. 1 Even though there are several renewable energy sources available, wind and solar energy are gaining an edge over the other resources due to their reliability and ability to deliver higher power levels. But it does have a limitation; that is, the input for solar PV system is highly intermittent. This effect of input intermittency can be nullified using power converters. 2,3 DC-DC converters are used to nullify these fluctuations through step up/step down of DC voltage from solar PV panel. Even though higher voltage can be obtained by connecting panels in series, losses due to partial shading and cost will be the drawbacks. 4-6 To achieve voltage boost, a boost converter have to be operated at high duty ratio. While operating the converter in higher duty ratio, issues like high switching voltage stress, limited switching frequency, reverse recovery problem and electromagnetic interference may occur, and also, it affects the efficiency of the converter. 7 As a remedy to the above setbacks, many DC-DC boost converter topologies are proposed recently. 8 Cascaded boost converter gives an opportunity of obtaining high output voltage with less duty ratio. 9,10 Even though it offers individual panel level MPPT, its cascaded structure raises the cost of overall system. 11 SEPIC converter embedded with the MPPT

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Analysis, modeling, and implementation of a new transformerless semi‐quadratic Buck–boost DC/DC converter

Cited by 31 publications

References 29 publications

New family of transformer‐less quadratic buck‐boost converters with wide conversion ratio

New family of transformer‐less quadratic buck‐boost converters with wide conversion ratio

Coupled‐inductor‐based high‐gain converter utilising magnetising inductance to achieve soft‐switching with low voltage stress on devices

Performance improvement of solar PV power conversion system through low duty cycle DC‐DC converter

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