Switched capacitor based Z‐source DC–DC converter

Rostami, Sajad; Abbasi, Vahid; Kerekes, Tamás

doi:10.1049/iet-pel.2019.0633

Cited by 42 publications

(30 citation statements)

References 26 publications

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“…There are other effective methods to increase output voltage which have particular pros and cons [10][11][12][13][14][15][16]. Combination of switched-capacitor and switched-inductor techniques with the conventional converters are two of the methods that can be mentioned [13,16].…”

Section: Introductionmentioning

confidence: 99%

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

Rezaie

Abbasi

2020

IET Power Electronics

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This study proposes a high step-up DC-DC converter based on quadratic boost converter. The proposed converter is composed of a quadratic boost converter and a multiplier cell. The converter can be used in low power applications which need to increase output voltage with high gain. In order to reduce number of the components, the multiplier cell is composed with the quadratic boost converter in a way to share one of their inductors. The found location of the multiplier adds some advantages to the proposed converter in comparison to the similar converters. The converter advantages include higher voltage gain, lower voltage stress on diodes and capacitors and requiring smaller inductors. To verify the points, principle operation of the converter is analysed and it has been compared with other converters. The proposed converter is designed and implemented using its main equations. Experiments are done along the lines of the analysis to prove that they have good accordance with each other. Operation quality factors such as voltage stress, voltage gain, efficiency, dynamic of the converter and operation in transient conditions are investigated using the experiments.

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Section: Introductionmentioning

confidence: 99%

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

Rezaie

Abbasi

2020

IET Power Electronics

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“…There are other effective methods to increase the output voltage which have particular pros and cons [14–16]. The combination of switched‐capacitor and switched‐inductor techniques with conventional converters are two of the methods that can be mentioned [15–18]. Also, the interleaving configuration of DC–DC converters is used due to its advantages such as reduction of input current ripple.…”

Section: Introductionmentioning

confidence: 99%

High step‐up DC–DC converter composed of quadratic boost converter and switched capacitor

Rezaie

Abbasi

Kerekes

2020

IET power electron.

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This study proposes a high step‐up DC–DC converter which is composed of a conventional quadratic boost converter, a switched capacitor and a coupled inductor. To reduce the number of components, the primary side of the coupled inductor is shared with the quadratic boost converter as one of its inductors. Furthermore, the output capacitor of the quadratic boost converter is divided into two capacitors and one of them is utilised in common with the switched capacitor. The converter is analysed and the obtained equations are used to compare the proposed converter with other converters which have similar structures. According to the comparisons, the proposed converter has advantages such as higher voltage gain, the lower voltage stress on the power switch and requiring a smaller inductor. In addition, the input source current is continuous and there is a common ground between the source and load. Increasing the turn ratio of the coupled inductor causes reduction of voltage stress on the power switch, diodes and capacitors. To investigate performance of the proposed converter, an 80 W prototype is built. The experiments show good accordance with the analysis and they demonstrate the high step‐up capability of the proposed converter.

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“…The quasi-ZSI (q-ZSI), as shown in Figure 1b, provides an effective solution to the above limitations [3]. Based on the basic ZSI/qZSI structure, many attempts have been made to enhance the performance of impedance source converters in terms of high boost capability, low voltage stresses across the components, and high efficiency [4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the SI-ZSI, the SI-qZSI can achieve a continuous input current and lower stresses across the components. Moreover, switched-capacitor (SC) cells can be employed to obtain low voltage stress, small inductors, high voltage gains, and efficiency [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Switched Quasi-Z-Source Inverter with Continuous Input Currents

2020

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Impedance source converters as single-stage power conversion alternatives can boost and regulate the output voltages of renewable energy sources. Nevertheless, they, also known as Z-source inverters (ZSIs), still suffer from limited voltage gains and higher stresses across the components. To tackle such issues, extra diodes, passive components, and active switches can be utilized in the basic ZSIs. In this paper, a modified switched-quasi-Z-source inverter (S-qZSI) is proposed, which features continuous input currents and high boosting capability to boost output voltage by minor modifications of a prior-art topology. Furthermore, the voltage stress of the active switches is reduced, which contributes to a lower cost. The operation principles are discussed comprehensively. The performance of the proposed ZSI in terms of conversion ratio, voltage gain, and stresses on the power switches and capacitors is benchmarked with selected ZSIs. Finally, simulations and experimental tests substantiate the theoretical analysis and superior performance.

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Switched capacitor based Z‐source DC–DC converter

Cited by 42 publications

References 26 publications

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

Effective combination of quadratic boost converter with voltage multiplier cell to increase voltage gain

High step‐up DC–DC converter composed of quadratic boost converter and switched capacitor

A Switched Quasi-Z-Source Inverter with Continuous Input Currents

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