"Uninterruptible power supply" Essays and Research Papers

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    Power Factor Correction

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    Laboratory 1: Power Factor Correction Figure 1 Power Factor Correction Note: The ammeters & Voltmeters read PEAK values‚ but the Wattmeter reads true rms power. This circuit is available on StudyNet as pfcor.sch‚ for use with TinaPlus in D411/D421. This lab consist of two sessions Session 1: Preparation (2 Hours). This is an open lab session where you will need to fill up the preparation answer sheet Session 2: Lab experiment (2 Hours). This is a supervised session where you will

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    51‚ NO. 3‚ JUNE 2004 641 A Review of Three-Phase Improved Power Quality AC–DC Converters Bhim Singh‚ Senior Member‚ IEEE‚ Brij N. Singh‚ Member‚ IEEE‚ Ambrish Chandra‚ Senior Member‚ IEEE‚ Kamal Al-Haddad‚ Senior Member‚ IEEE‚ Ashish Pandey‚ Member‚ IEEE‚ and Dwarka P. Kothari‚ Senior Member‚ IEEE Abstract—Three-phase ac–dc converters have been developed to a matured level with improved power quality in terms of power-factor correction‚ reduced total harmonic distortion at input ac

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    THE UNIVERSITY OF NEW SOUTH WALES FINAL EXAMINATION JUNE/JULY‚ 2001 ELEC4240/ELEC9240 POWER ELECTRONICS 1. Time allowed: 3 (three) hours 2. This paper has six questions. Answer any four. 3. All questions are of equal value. 4. A separate examination book should be used for each question. 5. Candidates may bring only slide rules‚ drawing instruments and approved electronic calculators into the examination room. 6. Answers must be written in ink. Except where

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    Dc Power Supply

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    5 Volt DC Power Supply Rakibul Hassan Department of EEE‚ Ahsanullah University of Science and Technology (AUST)‚ Dhaka‚ Bangladesh. E-mail: rakib_h@y7mail.com Key Words Transformer‚ Rectifier‚ Pulsating DC‚ Ripple voltage‚ Filter‚ Zener diode. Abstract: |Serial No.|Component Details |Specification |Quantity | |1. |Transformer |220V/12V |1 piece | |2. |p-n junction diode |1N4007 |4 piece

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    Unlimited Power Supply

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    Unlimited Power Supply Before I came up wit the U.P.S. (Unlimited Power Supply)‚ I was struggling with an idea for this science fair. However I thought of a magnetic car. Then after school I heard my parents saying that our electricity bill was getting too high‚ so I tried to think of a solution. Then I read an article about how a Prius battery could power a house‚ and then I thought about how I could power a house using a rechargeable battery like is found in the Prius. Then I came across the Bedini

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    Dc Power Supply

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    Abstract : A DC power supply is very important in our day to day life. We use it to charge or operate our DC components like charger light‚ cell phone battery charger etc. It’s nothing but a AC to DC converter. Keywords: 5V DC power supply‚ rectifier‚ diode‚ filter‚ capacitor‚ zener diode‚ voltage regulator‚ signal‚ waveshape. 1. Introduction I’m designing a 5V DC power supply. Here I’m basically designing a AC to DC converter. To convert the AC to DC‚ I’m using components like full wave bridge

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    ncontAUTOMATIC POWER FACTOR CORRECTION BY MICROCONTROLLER 8051 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Bachelor of Technology in Electrical Engineering By SATYASURANJEET BEHERA SIBASIS MOHAPATRA MONALISA BISOI Department of Electrical Engineering National Institute of Technology Rourkela 2007 AUTOMATIC POWER FACTOR CORRECTION BY MICROCONTROLLER 8051 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Bachelor of

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    Dc Power Supply

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    scheme DC-DC converter. The converter is a phase-shifted full-bridge PWM converter that is designed to operate as a front stage of a power conversion system where the input is a variable low voltage high current source. The converter is designed to step-up the low voltage input to an acceptable level that can be inverted to a 120/240 VAC 60Hz voltage for residential power. A DSP based adaptive control model is developed‚ taking into account line variations introduced by the input source while providing

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    UNINTERRUPTIBLE POWER SUPPLY SYSTEM (UPS) i ABSTRACT This project‚ the design and construction of Uninterruptible Power Supply System

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    power supply failure

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    ID:-13103030 Section:-B RAID is a data storage technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy and performance improvement. Data is distributed across the drives in one of several ways‚ referred to as RAID levels‚ depending on the specific level of redundancy and performance required. RAID is now used as an umbrella term for computer data storage schemes that can divide and replicate data among multiple physical drives: RAID is

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