An extendable step‐up/down DC–DC converter based on switched capacitors

Pourali, Fatemeh; Babaei, Ebrahim; Alizadeh, Darioush; Sabahi, Mehran

doi:10.1049/pel2.12534

IET Power Electronics

2023

DOI: 10.1049/pel2.12534

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An extendable step‐up/down DC–DC converter based on switched capacitors

Fatemeh Pourali

Ebrahim Babaei

Darioush Alizadeh

et al.

Abstract: In this paper, a new step‐up/down DC–DC converter based on switched capacitors (SCs) is proposed. This converter can provide highly variable voltage gain and merits like decreased voltage stress on power switches and capacitors. Besides, due to its modular configuration obtained by utilizing switched‐capacitor cells, it can generate high voltage gain in low‐duty cycles. In addition, the proposed converter has a continuous input current. The theoretical analysis of the proposed converter has been done, and its … Show more

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Cited by 2 publications

References 30 publications

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Stability and reliability analysis of a non‐isolated high gain DC‐DC converter

Rajesh,

Prabaharan

2023

IET Power Electronics

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This paper investigates the stability and reliability analysis of a non‐isolated high‐gain DC‐DC converter. The proposed DC‐DC converter produces a high gain output voltage with a lower duty ratio and reduced voltage stress on the semiconductor switch. A reliability analysis is performed to predict the failure rate and lifetime of the individual components using the military handbook (MIL‐HDBK‐217F). A state space equation and small signal modeling of the proposed converter are derived to elucidate the performance of the proposed converter through stability analysis. A closed‐loop using PID controller is incorporated to attain the constant regulated output voltage during sudden parameter changes. The validation of the closed‐loop using the PID controller is verified with the wide range of variations in the different parameters, such as input voltage, load value, and reference voltage value. The laboratory‐based prototype is developed for the proposed converter and validated the performance with 250 W. The power density and efficiency of the proposed converter are 1.360 kW/L and 93%, respectively.

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Stability and reliability analysis of a non‐isolated high gain DC‐DC converter

Rajesh,

Prabaharan

2023

IET Power Electronics

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An Improved Cascaded Boost Converter with an Ultra-High Voltage Gain Suitable for Dielectric Quality Tests

Gholizadeh,

Shahrivar,

Amini

et al. 2024

Energies

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Dielectric quality tests require a high AC voltage with a frequency range of 0.0001 Hz to 1000 Hz. However, providing a high AC voltage with such a frequency variety is challenging. Providing a high DC voltage and then applying such a voltage to an inverter to adjust the frequency can be an acceptable solution for such a challenge. Notably, a high DC voltage is required for DC tests. This study proposes an improved form of the cascaded boost converter, whose merits are as follows: (i) the high voltage gain providing low duty cycles is possible; (ii) the input current is continuous, which decreases the current ripple of the input filter capacitor; (iii) the current stress of the semiconductors is less than the input current, and most of them have a large difference with it; (iv) the voltage stress of the semiconductors is less than the output voltage with a large difference; (v) only one switch with a simple drive circuit is used; (vi) the common ground of the load and input source decreases the EMI noise; (vii) besides the high voltage gain, the voltage density of the converter based on the number of inductors, capacitors, switches, diodes, and whole components is greater than that of the recently proposed converters; (viii) only two stacked connections of the proposed topology can provide a 2.6 kV voltage for a higher DC voltage test of dielectrics. The functional details of the converter are extracted in ideal and continuous conduction (CCM) modes. Moreover, the converter’s voltage gain and density are compared with the recently proposed converters to show the superiority of the proposed converter. Finally, the experimental results are presented to validate the theoretical relations in a 140 W output power.

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An extendable step‐up/down DC–DC converter based on switched capacitors

Cited by 2 publications

References 30 publications

Stability and reliability analysis of a non‐isolated high gain DC‐DC converter

Stability and reliability analysis of a non‐isolated high gain DC‐DC converter

An Improved Cascaded Boost Converter with an Ultra-High Voltage Gain Suitable for Dielectric Quality Tests

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