Study on Improving Overall Efficiency of Front-end Power Supplies by Employing Method of Surge Energy Recycling

2012 ◽  
Vol 132 (7) ◽  
pp. 684-690 ◽  
Author(s):  
Toshikazu Okubo ◽  
Hiroyuki Shoji ◽  
Hideho Yamamura ◽  
Shinobu Irikura ◽  
Naoki Maru
Keyword(s):  
Power Supplies ◽  
Front End ◽  
Overall Efficiency

Improving the Overall Efficiency of Front-End Power Supplies by Surge Energy Recycling

2013 ◽  
Vol 185 (3) ◽  
pp. 41-48
Author(s):  
Toshikazu Okubo ◽  
Hiroyuki Shoji ◽  
Hideho Yamamura ◽  
Shinobu Irikura ◽  
Naoki Maru
Keyword(s):  
Power Supplies ◽  
Front End ◽  
Overall Efficiency

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

2021 ◽  
Author(s):  
Michael Chrysostomou ◽  
Nicholas Christofides ◽  
Stelios Ioannou ◽  
Alexis Polycarpou
Keyword(s):  
Energy Demand ◽  
Information And Communications Technology ◽  
Power Supplies ◽  
Communications Technology ◽  
Cell Structures ◽  
Full Power ◽  
Overall Efficiency ◽  
Simulation Results ◽  
The Individual ◽  
Theoretical Results

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.

Voltage-tunable portable power supplies based on tailored integration of modularized silicon photovoltaics and printed bipolar lithium-ion batteries

2020 ◽  
Vol 8 (32) ◽  
pp. 16291-16301
Author(s):  
Jung-Hui Kim ◽  
Inchan Hwang ◽  
Se-Hee Kim ◽  
Jeonghwan Park ◽  
Wonjoo Jin ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Power Supplies ◽  
Portable Power ◽  
Silicon Photovoltaics ◽  
Overall Efficiency

Voltage-tunable, all-day operating portable power supplies based on tailored integration of silicon photovoltaics and bipolar lithium-ion batteries are demonstrated with a wide voltage window, high overall efficiency, and stable cyclability.

scholarly journals Estimation of reliability of a interleaving PFC boost converter

2010 ◽  
Vol 7 (2) ◽  
pp. 205-216 ◽  
Author(s):  
Amer Gulam ◽  
Srinivasa Rao
Keyword(s):  
Power Supply ◽  
Boost Converter ◽  
Point Of View ◽  
Power Supplies ◽  
Total System ◽  
Front End ◽  
Higher Power ◽  
Conduction Mode ◽  
Very High ◽  
Continuous Conduction Mode

Reliability plays an important role in power supplies. For other electronic equipment, a certain failure mode, at least for a part of the total system, can often be employed without serious (critical) effects. However, for power supply no such condition can be accepted, since very high demands on its reliability must be achieved. At higher power levels, the continuous conduction mode (CCM) boost converter is preferred topology for implementation a front end with PFC. As a result, significant efforts have been made to improve the performance of high boost converter. This paper is one of the efforts for improving the performance of the converter from the reliability point of view. In this paper, interleaving boost power factor correction converter is simulated with single switch in continuous conduction mode (CCM), discontinuous conduction mode (DCM) and critical conduction mode (CRM) under different output power ratings. Results of the converter are explored from reliability point of view.

A High-Voltage Terminal for a Field-Emission Gun

1972 ◽  
Vol 30 ◽  
pp. 428-429
Author(s):  
N. F. Ziegler
Keyword(s):  
Field Emission ◽  
High Voltage ◽  
Atmospheric Pressure ◽  
Power Supplies ◽  
High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

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