A Soft-Switching Step-Down PFC Converter With Output Voltage Doubler and High Power Factor

Hosseinabadi, Farzad; Adib, Ehsan

doi:10.1109/tpel.2018.2820096

Cited by 30 publications

(12 citation statements)

References 29 publications

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“…In a single-stage conversion circuit it is very difficult to control both the input current quality, the output voltage level at different loads and at the same time achieve high conversion efficiency. The two-stage conversion is therefore preferred as a solution for loads above 1 kW [13], [14].…”

Section: Structure Of Ac To DC 48 V Power Suppliesmentioning

confidence: 99%

“…Dead angles are generated from the switching of the input rectified waveform. Boost PFC circuits have the switching device in the output of the circuit and thus have higher THD and is therefore preferred for high power applications [13], [14]. On the contrary, since Buck PFCs are only single-stage conversion systems they present higher efficiency than Boost converters at low power applications.…”

Section: Single-stage Psumentioning

confidence: 99%

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Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

Chrysostomou¹,

Christofides²,

Ioannou³

et al. 2021

Preprint

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The rapid growth of the Information and Communications Technology (ICT) sector requires additional infrastructure, such as more micro-datacenters and telecom stations, to support the higher internet speeds and low latency requirements of 5G net-works. The increased power requirements of the new ICT technologies necessitate the proposal of new power supplies in an attempt to retain the increase in energy demand and running costs. This work provides an in-depth theoretical analysis on the losses of the individual stages of commercially available PSU and proposes a new multicell PSU, Buck-PFC converter, which offers a higher overall efficiency at varying load levels. The theoretical results are verified using simulation results, via PSIM Thermal Module, and using experimental data. The results indicate that multi-cell structures can improve the overall PSU ef-ficiency by 1.2% at 50% rated power and more than 2.1% at full power. Finally, taking into consideration the economic implica-tions of this study, it is shown that the proposed multicell structure may increase the PSU costs by 10.78% but the payback pe-riod is in the order of just 3.3 years.

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Section: Structure Of Ac To DC 48 V Power Suppliesmentioning

confidence: 99%

Section: Single-stage Psumentioning

confidence: 99%

Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

Chrysostomou¹,

Christofides²,

Ioannou³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…where V LA is the auxiliary inductor's voltage. Considering (9) and the relation between the voltage and current of the auxiliary inductor, this relation can be written…”

Section: Mode 1 (T 0 − T 1 )mentioning

confidence: 99%

“…In [7, 8], pulse‐width modulation (PWM) techniques are used to provide soft‐switching condition. In PWM converters, some new and modified approaches such as zero‐voltage transition (ZVT) and zero‐current transition (ZCT) [9] are implemented to provide soft‐switching condition. In ZVT structures [10], switches’ voltages reach zero before switching and soft‐switching condition is provided.…”

Section: Introductionmentioning

confidence: 99%

Study and analysis of a DC–DC soft‐switched buck converter

Alavi

Babaei

Mohseni

et al. 2020

IET Power Electronics

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In this study, a soft-switched buck converter is proposed and analysed. In this structure, by adding an auxiliary inductor and two auxiliary capacitors, zero-voltage switching condition for switch's turn on and near to soft-switching condition for switch's turn off are provided. Furthermore, the power diode turns off under zero-current switching condition. As a result, switching losses and reverse recovery losses have been eliminated, and the proposed converter can provide high efficiencies. To prove the mentioned advantages, a 200 W laboratory prototype of the proposed converter is built and its results are investigated completely. On the basis of these results, the proposed converter can provide 96.1% experimental efficiency at 200 W output power, which proves the 96.78% theoretical efficiency. Also, in comparison results, it is shown that this converter not only provides higher efficiency in comparison with other structures, but also it has less components and simpler structure than other related buck converters.

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“…Different types of non‐isolated step‐up DC/DC converters are provided in the literature to achieve high voltage gain without any step‐up transformer [6]. Some of the prior non‐isolated configurations are multi‐stage/multi‐levels [7], switched capacitors [8–10], voltage multipliers [11–14], voltage lifts [15–17] and hybrid forms [18] that each configuration contains some variants and topologies.…”

Section: Introductionmentioning

confidence: 99%

Common‐ground non‐isolated high‐gain DC/DC converter for low powerdistributed generation photovoltaic systems

Nemati

Hosseini

Sharifian

et al. 2020

IET power electron.

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A Soft-Switching Step-Down PFC Converter With Output Voltage Doubler and High Power Factor

Cited by 30 publications

References 29 publications

Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

Multicell Power Supplies for Improved Energy Efficiency in the Information and Communications Technology Infrastructures

Study and analysis of a DC–DC soft‐switched buck converter

Common‐ground non‐isolated high‐gain DC/DC converter for low powerdistributed generation photovoltaic systems

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