Circuits Lecture Slides Intro&Module1Handouts
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Transcript of Circuits Lecture Slides Intro&Module1Handouts
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8/11/2019 Circuits Lecture Slides Intro&Module1Handouts
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Linear Circuits
An introduction to electric circuit elements and a study of circuitscontaining such devices.
Dr. Bonnie H. FerriProfessor and Associate ChairSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering
Lecturers
2
Nathan V. ParrishGraduate Research Assistant
School of Electrical andComputer EngineeringPhD Candidate & GraduateResearch AssistantSchool of Electrical and ComputerEngineering
Dr. Bonnie H. FerriProfessor and Associate Chair
School of Electrical andComputer Engineering
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Overview
3
analysis of circuits includingresistors, capacitors, and inductors with DC andAC sources in the time domain and in thefrequency domain
people with ascientific/technical background who are notelectrical or computer engineers
first course incalculus, matrices and linear algebra, complexnumbers, introduction to circuit elements
Learning Outcomes
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Be able to determine voltages and currents in awith single or multiple DC sources
Be able to determine
Be able to sketch theto step changes in the source voltage
Be able to analyze the of reactivecircuits
Be able to analyze the
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Concept Map
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Understand the concept map Relate material to practical problems and experience
Use the printed slides as a guide to taking notes Identify and organize important concepts and skills
Use the Pause button Take short quizzes in each lesson
Do the homework Do the quiz after each module Ask and answer questions on the forum
How to Succeed In Linear Circuits
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No direct email to instructional staff Send questions or comments to the forum
Only respectful, constructive comments are allowed
Answer questions on forum
Georgia Tech course Textbook
Labs and data acquisition board
Policies
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Module 1:Background
Overview
An introduction to electric circuit elements and a study of circuitscontaining such devices.
Dr. Bonnie H. FerriProfessor and Associate ChairSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering
Concept Map
2
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Concept Map: Background Module 1
3
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Nathan V. ParrishPhD Candidate & GraduateResearch AssistantSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering2
Charge andCurrent
Calculate the force charges exert on one anotherCalculate functions of charge and current
Calculate the forces two point charges exerton each other
Calculate current based on a charge function
Calculate charge based on a current function
Lesson Objectives
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Property of matter
Quantized
Measured in Coulombs ( C )
Electric Charge
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Electromagnetic Force
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Electric Fields
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Electrical Current
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Reference Directions
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Discussed charge as a property of matter
Calculated forces of charge using Coulombs Law
Explored electric fields the means of thisinteraction
Described current as the time derivative of charge Emphasized the importance of current reference
directions
Summary
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Nathan V. ParrishPhD Candidate & GraduateResearch AssistantSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering2
Voltage
Modify voltage values to reflect voltage referencesDescribe how a chemical battery worksIdentify if a battery is charging or discharging
Calculate voltage from the energygained/consumed as a charge moves through anelectric field
Correctly specify voltages as references change
Describe the operation of a chemical battery Identify if a battery is charging or dischargingbased on the voltage reference and current flow
Lesson Objectives
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Voltage Reference
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Example: Finding Voltages
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Charge crates electric fields
Voltage is energy gained/released as chargesmove through an electric field
Described how voltage originates fromdifferences in charge density
Case study: how lead-acid batteries work
Summary
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Nathan V. ParrishPhD Candidate & GraduateResearch AssistantSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering2
Power and Energy
Calculate power and energyDescribe the difference between power and energyUse conservation of energy to find unknown energyUse power to calculate current or voltage
Calculate power from energy function Calculate energy from a power function Use conservation of energy to find power of an
unknown device
Calculate power from voltage and current Find a voltage or a current for a device with a
known power
Lesson Objectives
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Power
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Instantaneous Change
7
-1 0 1
0
1
Time(s)
Energy(J)
-1 0 1
-1
0
1
Time (s)
Power(W)
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You run a power company. Do you chargecustomers for power or energy? Why?
Charging for Power
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Conservation of Energy
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Reference Direction
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Using Power for Analysis
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Described the relationship between power andenergy and how to calculate them
Described how voltage and current relate topower
Presented a derivation for conservation of powerand how this property is used in analysis
Solved first simple analysis problem
Summary
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Nathan V. ParrishPhD Candidate & GraduateResearch AssistantSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering2
Introduction toCircuit Diagrams
Identify a collection of basic circuit elementsBe able to identify nodesIdentify short/open circuitsIdentify equivalent circuit diagrams
Identify a set of circuit elements
Identify the nodes in a circuit diagram
Recognize self-contradictory circuits
Identify open/closed circuit
Identify when two circuits are equivalent
Modify a circuit to form an equivalent circuit
Lesson Objectives
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Circuit Diagrams
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Devices are presented withsome known parameters
We wish to identify thebehavior of the device
Identify behavior based on thecircuit using calculation
What is Circuit Analysis?
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Zero internal resistance
Nodes and junctions
Zero voltage drop on node
Arbitrary current possible
Wires
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Independent Sources
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Dependent Sources
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Resistors
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Devices for resisting current
Drawn as zig-zag lines
Number of zigs ands zags can vary
Other similar devices will beintroduced as they are encountered
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Ground
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Common Point of reference
Path of electrons
Lightning rod (literal ground)
Prevent electrocution
Prevent damage to sensitivecomponents
Open/Short Circuits
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Self-Contradictory Circuits
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Putting It Together
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Changing Circuits
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Described the concept of a node and how to identify one Introduced independent and dependent voltage and current
sources Introduced a resistor a device that will be discussed in
more detail later
Presented the idea of a ground Showed examples of self-contradictory circuits Described how circuits can be equivalent
Summary
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Dr. Bonnie H. FerriProfessor and Associate ChairSchool of Electrical andComputer Engineering
School of Electrical and Computer Engineering
Module 1Background
Wrap Up
Summary of Background Module
Concept Map: Background Module 1
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Understand charge and current
Be able to calculate the effect of one charge onother charges
Be able to calculate current from charge flow in
time
Important Concepts and Skills
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Understand how voltage is created bydifferences in charge density
Understand how chemical reactions can cause avoltage
Be able to use voltage references
Be able to identify some basic circuit elements Be able to identify nodes of a circuit diagram
Be able to identify open/short circuits
Be able to move elements of a diagram
Important Concepts and Skills
5
Be able to calculate power from energy
Be able to analyze circuit using conservation of power
Be able to analyze circuit using power, voltage, and current
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Concept Map
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