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Introduction to Engineering Electrical Circuits and Controls - 1

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coralie
13 diapositives · 288 Views · Jul 04, 2013

Topics in electrical circuits and controls, providing a foundational understanding for engineering students. It includes an agenda focused on discussing basic concepts, reading, and creating simple electrical drawings. Participants will gain insights into the principles of electrical circuits, the importance of controls in engineering applications, and practical skills for drafting electrical diagrams. This knowledge is vital for anyone pursuing a career in engineering, as it lays the groundwork for more advanced studies and applications in the field.

#Electrical Engineering #Circuit Design #Control Systems #Electrical Drawings #Engineering Basics
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  1. Introduction to EngineeringElectrical Circuits and Controls - 1 Agenda Introduction to electrical circuits, controls and preparing simple electrical drawings.

  2. Agenda • Discuss basic concepts for electrical circuits and controls. • Learn how to read and create simple electrical drawings.

  3. Electrical Drawings • Electrical drawings provide a complete description of the electrical circuitry for a product. • The purpose of a circuit diagram is to clearly show how components are connected electrically. This is not the same as showing where components are physically, or how they have been laid out on a circuit board. • Standard symbols are used.

  4. Symbols for Basic Components in a Circuit resistor inductor capacitor voltage source current source switch

  5. Example: Single Use Camera Flash Circuit

  6. Creating Electrical Circuit Diagram for a Device - Flashlight (Switch) S (Resistive Load) R (Battery) V (Current) I actual object electrical drawing Electrons flow from (-) to (+); by convention, current is said to flow in the opposite direction.

  7. Ohm’s Law V = IR The voltage change V (volts) across any resistive load is equal to the product of the current I (amps) and the resistance R (Ohms).

  8. Basic Relationship – Power Law P = IV Power dissipated P (watts) is equal to product of the current I (amps) and voltage V (volts)

  9. Example 1 – Instructor Example R = 12 ohms 120 V i = ? Current I = V/R = 120 V/12 Ohms = 10 amps Power P = V I= 120 V * 10 Amps = 1200 Watts

  10. Example 2 – Student Example R = 24 Ohms 240 V I = ? I = P =

  11. Example 3 – Resistance of Light Bulbs • Without doing any calculations, which light bulb has the lowest resistance? • 75 W bulb at 120 V • 150 W bulb at 120 V

  12. Example 3 – Resistance of Light Bulbs, calculate and compare Calculate the resistance using Power Law and Ohms Law. Use: I = P / V (P = VI) & R = V / I • Some groups do 75 W bulb • Other groups do 150 W bulb • Compare Results

  13. Assignment #28 • Do problem set 1 on electrical circuits found in the assignment packet.