Information Technology in Circuit Design of On-Line UPS

2014 ◽  
Vol 886 ◽  
pp. 505-508
Author(s):  
Chun Juan Han ◽  
Fa Cheng Rui ◽  
Sheng Liu ◽  
Shou Qin Tang
Keyword(s):  
Circuit Design ◽  
Power Supply ◽  
Information Industry ◽  
Uninterruptible Power Supply ◽  
Computer Communication ◽  
Power Failure ◽  
Modern Development ◽  
On Line ◽  
Quality And Reliability ◽  
Uninterruptible Power

Uninterruptible Power Supply plays an important role in critical load, such as: computer, communication system and hospital. They can provide reliable and pure power supply for loads neither power good or not. With the best performance, on- Line UPS provider most sufficient protection for loads power failure in various UPS. With the continuous development of power electronics technology and information industry, this article design a high quality and reliability UPS to meet modern development of science and technology.

Warning! Fire in the ICU

2014 ◽  
Vol 29 (3) ◽  
pp. 339-340 ◽  
Author(s):  
Fabio Rispoli ◽  
Michele Iannuzzi ◽  
Edoardo De Robertis ◽  
Ornella Piazza ◽  
Giuseppe Servillo ◽  
...  
Keyword(s):  
Power Supply ◽  
University Hospital ◽  
Alarm System ◽  
Hospital Emergency ◽  
Publication Type ◽  
Uninterruptible Power Supply ◽  
Staff Members ◽  
Emergency Procedures ◽  
Power Failure ◽  
Uninterruptible Power

AbstractAt 5:30 pm on December 17, 2010, shortly after a power failure, smoke filled the Intensive Care Unit (ICU) of Federico II University Hospital in Naples, Italy, triggering the hospital emergency alarm system. Immediately, staff began emergency procedures and alerted rescue teams. All patients were transferred without harm. The smoke caused pharyngeal and conjunctival irritation in some staff members. After a brief investigation, firefighters discovered the cause of the fire was a failure of the Uninterruptible Power Supply (UPS).RispoliF, IannuzziM, De RobertisE, PiazzaO, ServilloG, TufanoR. Warning! Fire in the ICU. Prehosp Disaster Med. 2014;29(3):1-2.

scholarly journals DC UPS for Critical Loads

2015 ◽  
Vol 5 (2) ◽  
pp. 231
Author(s):  
Ganesh S ◽  
Chiranjit Ghosh T ◽  
Kokilasree R ◽  
Nandhakumar M ◽  
Md Haroon Alim T
Keyword(s):  
Power Supply ◽  
Low Cost ◽  
Uninterruptible Power Supply ◽  
Critical Data ◽  
Power Failure ◽  
Switching Losses ◽  
Dc Power ◽  
Full Power ◽  
Switched Mode Power Supply ◽  
Uninterruptible Power

<p>The usual way to avoid a computer shutdown during a mains failure is to connect an  uninterruptible power supply system (UPS), which can be suitably modified and fitted inside the computer cabinet by the use of proposed methodology known as a dc UPS.  Conventional desk top UPS systems store electricity in form of chemical energy in batteries and when ever mains fail the batteries provide DC power which is then converter to ac by inverter and then fed to the computer in order to save critical data.  Thus power from mains or from UPS is fed to switched mode power supply unit which converts it to dc to  supply the computer motherboard and accessories.  Leaving the case of the computer powered by mains, duing power failure the dc power is unnecessarily converted to ac and then to dc again in SMPS hence high switching losses and heat is produced there by making the entire system very lowe efficient.  In this work it is proposed to directly feed the dc power from the battery to the computer SMPS system by building a UPS arrangement within the computer system.  This not noly saves space, it is highly efficient compared to the conventional ups system, easy to carry, low cost and reliable since there is no change over operation is required/.  A complete design of an ac to dc power supply with an internal dc UPS is presented in this paper. . A prototype has been fully developed and tested as a PC power supply. Thus the result is achieved at full power about 6-8 minutes.</p>

scholarly journals On -Line UPS with Low Frequency Transformer for Isolation

2014 ◽  
Vol 10 (2) ◽  
pp. 100-106
Author(s):  
Husham Hussein
Keyword(s):  
Power Supply ◽  
Theoretical Calculations ◽  
Low Frequency ◽  
Open Loop ◽  
Uninterruptible Power Supply ◽  
Design Specifications ◽  
Initial Stage ◽  
On Line ◽  
Uninterruptible Power ◽  
Evaluation Parameters

This paper addressed the design of online uninterruptible power supply (UPS) system with a low frequency transformer for isolation, based on given specifications which include bypass switch and battery and taken into account the concentrated on open loop operation. Depending on the application, the online UPS system is composed by two stage conversions of AC/DC and DC/AC, the enclosure of these freeloading effects of all components and devices is very important to design the UPS system for acceptable performance. The initial stage of the design is based on the theoretical calculations and few assumptions have been made throughout the design. Simulation work has been carried out by MATLAB/Simulink program to validate the operation of the online UPS system with low frequency transformer isolation. The analysis of the results are presented and the justifications with regards to performance evaluation parameters which some are not satisfied the design specifications are discussed in details.

scholarly journals Multimode Operation for On-Line Uninterruptible Power Supply System

2019 ◽  
Vol 7 (2) ◽  
pp. 1181-1196 ◽  
Author(s):  
Jinghang Lu ◽  
Mehdi Savaghebi ◽  
Saeed Golestan ◽  
Juan C. Vasquez ◽  
Josep M. Guerrero ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Uninterruptible Power Supply ◽  
On Line ◽  
Uninterruptible Power ◽  
Multimode Operation
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