UNIVERSIDAD AUTONOMA DE COAHUILA FACULTAD DE SISTEMAS DC Motors Catedrático: Ing. Gustavo Mendoza Leal Alumno: Alfredo Valdés Cárdenas Introduction A DC motor is a type of electrical machine that converts direct current into mechanical power by means of a magnetic field. DC motors are widely used in field applications because of their many advantages over AC motors such as speed control‚ high starting torque‚ quick starting‚ stopping‚ reverse and acceleration and free from harmonics found
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LEARNING MATERIALS ELECTRONICS Table of Contents Table of Contents I. INTRODUCTION II. OBJECTIVES III. PRE-ASSESSMENT IV. LEARNING GOALS/TARGETS V. COMMON COMPETENCIES A. KNOW Lesson 1. Occupational Health and Safety Lesson 2. Introduction to Electricity Lesson 3. Basic Structure of Matter Lesson 4. Electric Charge Lesson 5. The Valence Shell Lesson 6. Electrical Current Lesson 7. Voltage Lesson 8. Resistance B. PROCESS Lesson 1. OHM’s Law Lesson 2. Complete Circuit Lesson 3. Types of Circuit
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INTRODUCTION The growing use of electronic equipment produces a large amount of harmonics in the power distribution systems because of non-sinusoidal currents consumed by non-linear loads. Some of the examples for non-linear loads are diode-rectifiers‚ thyristor converters‚ adjustable speed drives‚ furnaces‚ computer power supplies‚ uninterruptible power supplies‚ etc. Even though these devices are economical‚ flexible and energy efficient‚ they may degrade power quality by creating harmonic
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Buck-Converter Design Demystified Stepdown (buck) switching converters are integral to modern electronics. They can convert a voltage source (typically 8 V to 25 V) into a lower regulated voltage (typically 0.5 V to 5 V). Stepdown converters transfer small packets of energy using a switch‚ a diode‚ an inductor and several capacitors. Though substantially larger and noisier than their linear-regulator counterparts‚ buck converters offer higher efficiency in most cases. Despite their widespread use
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Multiuser SMS Based Wireless Electronic Notice Board Abstract— This is the model for displaying notices in colleges on electronic notice board by sending messages in form of SMS through mobile; it is a wireless transmission system which has very less errors and maintenance. The hardware board contains microcontroller AT89c52 at the heart of the system. The microcontroller is interfaced with GSM Modem via MAX232 level convertor. It is used to convert RS232 voltage levels to TTL voltage levels and
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CHAPTER 1 INTRODUCTION Mobile Phones and the related technologies are becoming more and more ubiquitous. Various technical arenas in the field of Telecommunication and Embedded Systems have come very near to the common people. The number of people with cell phones is on the rise. A day will come‚ somewhere in the near future‚ when a mobile phone is referred to in the same class of Food‚ clothing and shelter
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The True Cost of Providing Energy to Telecom Towers in India Whitepaper Contents Introduction .......................................................................................... 2 A typical telecom tower site..................................................................... 3 Telecom site operating conditions ............................................................ 3 Case study: 3 BTS Site with 12 hours of electrical grid supply ..................... 4 Cost calculations: CAPEX
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AN OVERVIEW OF THE Shed: This shed was set up in Feb. 1976 by Railway Electrification Organization as a part of Tundla – Delhi electrification scheme and was designed to home 50 electric locomotives at an initial cost of 1.5 crore. The prime objective of setting up this shed was to maintain Electric locomotives required for hauling important mail/express trains on Delhi – Howrah section. The initial holding of the shed was 34‚ all of which were WAM4. At present‚ holding has increased to 138
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PTU/BOS/EC/101/08-05-2004/BATCH 2004 Punjab Technical University‚ Jalandhar B.Tech. Electronics & Communication Engg. Study scheme 3rd Semester Course code AM-201 EE-201 EC-201 EC-203 Course Title Applied MathematicsIII Network Analysis & Synthesis Electronics Devices & Circuits Electronic Measurement & Instrumentation L 4 3 3 3 T 1 2 1 1 P 0 0 0 0 Int. 40 40 40 40 Ext. 60 60 60 60 TOTAL 100 100 100 100 Object Oriented CS –252 Programming using C++ Lab.-I (Electronic EC-205 Devices & Networks)
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FINANCIAL RATIO ANALYSIS OF B.H.E.L Project submitted on completion of Summer Internship 7/11/2009 BHARAT HEAVY ELECTRICALS LIMITED‚ BHOPAL Bhanupriya Vishwakarma MBA (Financial Adminnistration) Institute of Management Studies‚ DAVV‚ Indore TABLE OF CONTENTS Certificate Acknowledgements Declaration BHEL- at a glance -Introduction -Product Profile Ratio Analysis - What is Ratio analysis? - Role of Ratio analysis - Limitations of Ratio analysis Financial Statements and Ratio Analysis -Financial
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