High Frequency Multicell Cascaded Quasi-Square-Wave Boost Converter

Yuan, Jing; Chen, Yenan; Yang, Yongheng; Blaabjerg, Frede; Chen, Minjie

doi:10.1109/compel49091.2020.9265645

Cited by 1 publication

(2 citation statements)

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“…It is obvious from ( 12), (13), and ( 14), that each cell shares a portion of the output load based on the internal resistance, the open circuit voltage and the total load. For IPOP structures with the same type of converter cells, (in ideal conditions) it can be realized from equation (12) that the output power of each cell is equal.…”

Section: Experimental Verification Of Multicell Structuresmentioning

confidence: 99%

“…Furthermore, the reliability of the three-cell DC to DC structure is reduced since failure of one of the three cells leads to overall system failure. ISOS structures in both AC to DC and DC to DC conversion stages do not significantly improve the efficiency and have much more complicated load sharing control [13,14]. The IPOS structure which is proposed in [15] in order to improve efficiency and output voltage, reduces the overall system efficiency (maximum efficiency of 91%) and increases the complexity of the system.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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 networks. The increased power requirements of the new ICT technologies necessitate the proposal of new power supplies, in an attempt to support 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, the buck PFC converter, which offers a higher overall efficiency at varying load levels. The theoretical results are verified using simulation results, via a PSIM Thermal Module, and using experimental data. The results indicate that multicell structures can improve the overall PSU efficiency by 1.2% at 50% rated power and more than 2.1% at full power. Finally, taking into consideration the economic implications of this study, it is shown that the proposed multicell structure may increase the PSU costs by 10.78%, but the payback period is in the order of just 3.3 years.

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Section: Experimental Verification Of Multicell Structuresmentioning

confidence: 99%