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802307 Electrical Engineering for Mechinacal Engineers

802307 Electrical Engineering for Mechinacal Engineers. Electrical Engineering department Umm Al- Qura University Dr. Basim J. Zafar. This Course …. Applications of Electrical Engineering in Different Systems.. Concepts and Basics of Electricity and Electronics..

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802307 Electrical Engineering for Mechinacal Engineers

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  1. 802307Electrical Engineeringfor Mechinacal Engineers Electrical Engineering department Umm Al-Qura University Dr. Basim J. Zafar

  2. This Course … • Applications of Electrical Engineeringin Different Systems.. • Concepts and Basics of Electricity and Electronics.. • Practical Engineering Applications..

  3. Course Content • History of Electricity • Basic Concepts • electrons, battery, DC&AC, frequency, closed loop, current, RMS • Components • R, C, L, fuses, breakers, relays, solenoids, diodes, transistors, ICs

  4. Course Content • Circuit Analysis • ohms law, dividers, KCL, KVL, complex impedance, current source, power • Application Specific Circuits • Power Generation and Distribution • DC machines, transformers, 3-phase systems

  5. Course Content • Sensors & Actuators • resistive, capacitive, inductive • special sensors • data acquisition

  6. Class Format • Active Class • Teams of 2 students • Weekly Quiz (no makeup's) • Weekly Activities • In-Class Readings

  7. Rules • Quizzes • grades 0 or 10 • be ON-TIME • absence = -2 • no material on table • calculator & pencil • 2 decimal points with proper units • cheating = BIG TROUBLE

  8. Rules • Activities • team ID + members IDs • nice fonts and presentation • members loads must be equal • Teamwork • any conflict should be stated from the beginning

  9. Grades • Quizzes / Class Activities 10% • Mid Term Exams I 15% • Mid Term Exams II 15% • Final 40% • Lab 20%

  10. Students ID’s • EE307 Sections • IDs in Teams: • Team A: A1 – A2. • Team B: B1 – B2. • Team C: C1 – C2. • Team D: D1 – D2. • Team E: E1 – E2.

  11. http://uqu.edu.sa/bjzafarE-mailBJZafar@uqu.edu.sa Class homepage

  12. Introduction Section 01

  13. History of Electricity • Ancient Egyptian 2750 BC • shocks from electric fish

  14. History of Electricity • Romans 1500 BC • shocks can travel in metals • Thales 600 BC • Noticed static electricity from polishing amber with a piece of wool or fur. • Arabs 1400 • Identity of lightening • William Gilbert 1600 • Coined the New Latin word electricus to refer to the property of attracting small objects after being rubbed

  15. History of Electricity • Benjamin Franklin 1753 • lightening key experiment • Luigi Galvani 1771-1791 • nerve cells passed signals to the muscles • Alessandro Volta 1800 • invented the voltaic pile consist of Zinc and silver. • Hans Christian Ørsted 1819 • demonstrates electromagnetism. Current flowing in a wire creates a magnetic field which deflects a compass needle.

  16. History of Electricity • André-Marie Ampère 1820 • Figures out a way to measure the strength of a magneticfield in relation to an electriccurrent, known as Ampere’stheorem. • Michael Faraday 1831 • learned how to produce continuous voltage. |This was the first electric motor (generator). • Georg Ohm 1827 • mathematically analyzed the electrical circuit (ohm's law) • Tesla, Edison, Westinghouse, Siemens, 1900’s Graham Bell and Kelvin • Electricity was turned from a scientific curiosity into an essential tool for modern life (Second Industrial Revolution)

  17. Machines Monitoring

  18. Fully Programmed Machines

  19. Engraving

  20. Control Rooms

  21. Automation

  22. Robots

  23. Accuracy

  24. ExoMars Mission Life in other planets!

  25. ExoMars Mission • landing of a large payload on Mars • navigation and operation of a mobile scientific platform • a novel drill to obtain subsurface samples • sample processing and distribution system • protection and cleanliness levels

  26. ExoMars Mission

  27. Printed Circuit Board (PCB)

  28. Process Check, Home Work • Ask yourself.. • What do I need to know about EE?

  29. Basic Concepts Section 02

  30. Electrons • Atoms and Electrons

  31. Is It Like This?!

  32. Electricity • If electrons were pushed, they produce a current

  33. Battery • Source of pushing electrons • Electrochemical reactions • Look for types of batteries in Wikipedia!! Home Work

  34. Volt • Alexander Volta (first battery) • Electromotive Force • 1.5V, 110V, 13.8kV

  35. Current • Number of electrons passing every second • Ampere (A) is a unit of current • 1 A = 6.28 x 1018 electrons/sec • At home: 60A,100A • Electronics: 10mA

  36. AC and DC Currents • DC: direct current • AC: alternating current volt volt time time

  37. Frequency of AC Signal volt volt time time • Frequency = Number of cycles per second

  38. Experiment!! • What’s the highest frequency your eyes can notice? • frequency vs. amplitude.. • 790–400 terahertz – light

  39. Closed Loop Circuits • No current will flow in an open loop circuit..

  40. Closed Loop Circuits • Electric Circuit is a pipeline that facilitates the transfer of charge from one point to another

  41. Power • Power is the time rate of change of energy • Unit: watts (W) • P=VI

  42. Elements supplying Energy vs. Elements absorbing Energy • An element in the electric circuit is absorbing energy if +ve current enters the +ve terminal • An element in the electric circuit is supplying energy if +ve current enters the -veterminal

  43. Ground Currents • Why birds do not get shocked by high voltage lines? • How do you charge a weak car battery?

  44. Activity • Determine the amount of power absorbed or supplied by the elements in the figure? I = 2 A V1= 4 V 4 V

  45. Activity • Determine the amount of power absorbed or supplied by the elements in the figure? V1= 12 V 12 V I = 4 A

  46. AC Source • Generally produces sine wave

  47. RMS • RMS: Root Mean Square • power is measured instead of peak voltage • for sine or cosine signals, v(t) = A cos(2pt/T)

  48. RMS • If your meter reads 10V~ • then vpeak = 10*1.4 = 14V • If your peak voltage is 154Vp • then the meter reads RMS = 154*0.7 = 110V~

  49. More Readings Basic Engineering Circuit Analysis By J. D. Irwin and R. M. Nelms John Wiley & Sons, 2005 or newer edition

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