Definition Application of electrical machines Electromagnetism: review Analogies between electric and magnetic circuits Faraday s Law Electromagnetic

Size: px
Start display at page:

Download "Definition Application of electrical machines Electromagnetism: review Analogies between electric and magnetic circuits Faraday s Law Electromagnetic"

Transcription

1 Definition Application of electrical machines Electromagnetism: review Analogies between electric and magnetic circuits Faraday s Law Electromagnetic Force Motor action Generator action Types and parts of machines 1

2 1. Definition Electric machines are energy conversion devices that convert electrical energy to mechanical energy and vice versa through the medium of magnetic field. An electric machine is called a generator when it is used to convert mechanical energy to electrical energy. On the contrary, when an electric machine is operated to convert electrical energy to mechanical energy, it is called a motor. 2. Application of Machines Electric motors are used to operate washing machines, elevators, cranes etc while electric generators are used to generate electricity for power generation and alternator for charging car battery. 2

3 Applications of Machines 3

4 Applications of Machines 4

5 Applications of Machines 5

6 Electromagnetism Magnetic fields are the fundamental mechanism by which energy is conserved from one form to another in motors, generators and transformers. A magnetic field is a condition resulting from electric charges in motion. For convenience in visualization and analysis, magnetic fields are represented on diagrams by close loops. Theses loops, called magnetic flux lines 6

7 Magnetic Circuit Magnetic circuit showing an arrangement of ferromagnetic materials (core) that forms the path and guide the magnetic flux. The flux always takes the shortest path 7

8 Megnetomotive force It is the driving force that causes the magnetic filed to appear in a magnetic circuit. Magnetic Field Intensity It is the mmf per unit length of the magnetic circuit and it may vary from point to point throughout the circuit. Flux Density It s a measure of the concentration of lines of flux in a particular section of magnetic circuit 8

9 Reluctance It s a measure of the opposition the magnetic circuit offers to the flux. The reluctance of a magnetic circuit is related to its length, cross sectional area, and permeability. 9

10 Relative permeability and magnetization curves Relative permeability is the ratio of the permeability of a material to the permeability of free space. It is very useful for comparing the magnetizability of different magnetic materials whose relative permeabilities are known. 10

11 The ratio µ=b/h is called magnetic permeability and has different values for different magnetic materials. 11

12 Analogies between Electric and Magnetic Circuits The relationship between mmf, flux, and reluctance in a magnetic circuit is an analog of the relationship bwteen emf, current and resistance respectively, in an electric circuit. 12

13 Magnetic Circuit and its Electrical Analog 13

14 Magnetic Circuit and its Electrical Analog A ferromagnetic core is shown in figure below. The depth of the core is 5 cm. The other dimensions of the core are as shown in the figure. Find the value of the current that will produce a flux of Wb. With this current, what is the flux density at the top of the core? What is the flux density at the right side of the core? Assume that the relative permeability of the core is

15 15

16 16

17 Magnetic Hysteresis and hysteresis losses Hysteresis means lagging behind. In magnetic hysteresis, flux density B lags behind the field intensity H Hysteresis loop shows the characteristics of magnetic material. It is obtained by plotting values of flux density B for periodically reversing field intensity 17

18 Magnetic Field play an important role in electric machines. Magnetic fields are produced when current flows in coils of wire. Magnetic fields have 2 funtions: - produce torque for motor operation - generate voltage for generator operation 18

19 If a conductor is moved by an external force, D in a magnetic field, an electromagnetic force is produced between the two ends of the conductor. This is the basis for the operation of a generator. According to Faraday s Law, a magnetic field will induce a voltage, e in a coil. This forms the basis for the operation of a generator. The voltage, e is given by, e dnφ dt NdΦ dt N Number of turns of each coil Φ Magnetic flux (Weber) 19

20 Force F is produced and it acts on the conductor. Force is given by, F = BI (Newtons) Current flows in a conductor and produces a force and a mechanical output i.e. conductor motion. This serves as the basis for motor operation. 20

21 Michael Faraday showed that passing a current through a conductor freely suspended in a fixed magnetic field creates a force which causes the conductor to move through the field. The force created by the current, now known as the Lorentz force, acts between the current conductor and the magnetic field, or the magnet creating the field.the magnitude of the force acting on the conductor is given by: F = BLI where F is the force on the conductor, L is the length of the conductor and I is the current flowing through the conductor 21

22 Faraday also showed that the converse is true - moving a conductor through a magnetic field, or moving the magnetic field relative to the conductor, causes a current to flow in the conductor. The magnitude of the EMF generated in this way is given by: E = BLv where E is the generator EMF (or back EMF in a motor) and v is the velocity of the conductor through the field 22

23 In practice, both the motor and the generator effects take place at the same time. Passing the current through a conductor in the magnetic field causes the conductor to move through the field but once the conductor starts moving it becomes a generator creating a current through the conductor in the opposite direction to the applied current. Thus the motion of the conductor creates a "back EMF " which opposes the applied EMF. Conversely moving the conductor through the field causes a current to flow through the conductor which in turn creates a force on the conductor opposing the applied force. 23

24 24

25 25

26 1. 3 types of rotating machines: - Synchronous AC Machines - Asynchronous Machines or Induction Machines - DC Machines 26

27 - Shaft is fasten to the rotor so that both rotate at the same angular speed - Connection of the machine to load is through the shaft - 3 main parts for both rotor and stator: - core - winding - insulation 27

MAGNETIC CIRCUITS. Magnetic Circuits

MAGNETIC CIRCUITS. Magnetic Circuits Basic Electrical Theory What is a magnetic circuit? To better understand magnetic circuits, a basic understanding of the physical qualities of magnetic circuits will be necessary. EO 1.8 EO 1.9 EO 1.10

More information

Chapter 1 Magnetic Circuits

Chapter 1 Magnetic Circuits Principles of Electric Machines and Power Electronics Third Edition P. C. Sen Chapter 1 Magnetic Circuits Chapter 1: Main contents i-h relation, B-H relation Magnetic circuit and analysis Property of magnetic

More information

Lecture Notes ELEC A6

Lecture Notes ELEC A6 Lecture Notes ELEC A6 Dr. Ramadan El-Shatshat Magnetic circuit 9/27/2006 Elec-A6 - Electromagnetic Energy Conversion 1 Magnetic Field Concepts Magnetic Fields: Magnetic fields are the fundamental mechanism

More information

Revision Guide for Chapter 15

Revision Guide for Chapter 15 Revision Guide for Chapter 15 Contents tudent s Checklist Revision otes Transformer... 4 Electromagnetic induction... 4 Generator... 5 Electric motor... 6 Magnetic field... 8 Magnetic flux... 9 Force on

More information

Magnetism & Electromagnetism

Magnetism & Electromagnetism Magnetism & Electromagnetism By: Dr Rosemizi Abd Rahim Click here to watch the magnetism and electromagnetism animation video http://rmz4567.blogspot.my/2013/02/electrical-engineering.html 1 Learning Outcomes

More information

MAGNETIC CIRCUITS, MOTOR AND GENERATOR ACTION

MAGNETIC CIRCUITS, MOTOR AND GENERATOR ACTION Topic 3 MAGNETIC CIRCUITS, MOTOR AND GENERATOR ACTION Magnetic Flux SI unit, Webers (Wb) ϕ Flows from North to South Pole 1 Magnetic Flux Density Measure of Flux/Area SI units, Wb/m 2 = Tesla, B Think

More information

MCE380: Measurements and Instrumentation Lab. Chapter 5: Electromechanical Transducers

MCE380: Measurements and Instrumentation Lab. Chapter 5: Electromechanical Transducers MCE380: Measurements and Instrumentation Lab Chapter 5: Electromechanical Transducers Part I Topics: Transducers and Impedance Magnetic Electromechanical Coupling Reference: Holman, CH 4. Cleveland State

More information

Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies

Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies Ch. 23 Electromagnetic Induction, AC Circuits, And Electrical Technologies Induced emf - Faraday s Experiment When a magnet moves toward a loop of wire, the ammeter shows the presence of a current When

More information

Electromagnetism. Topics Covered in Chapter 14:

Electromagnetism. Topics Covered in Chapter 14: Chapter 14 Electromagnetism Topics Covered in Chapter 14: 14-1: Ampere-turns of Magnetomotive Force (mmf) 14-2: Field Intensity (H) 14-3: B-H Magnetization Curve 14-4: Magnetic Hysteresis 14-5: Magnetic

More information

Lesson 17: Synchronous Machines

Lesson 17: Synchronous Machines Lesson 17: Synchronous Machines ET 332b Ac Motors, Generators and Power Systems Lesson 17_et332b.pptx 1 Learning Objectives After this presentation you will be able to: Explain how synchronous machines

More information

An Introduction to Electrical Machines. P. Di Barba, University of Pavia, Italy

An Introduction to Electrical Machines. P. Di Barba, University of Pavia, Italy An Introduction to Electrical Machines P. Di Barba, University of Pavia, Italy Academic year 0-0 Contents Transformer. An overview of the device. Principle of operation of a single-phase transformer 3.

More information

ELECTRICALMACHINES-I QUESTUION BANK

ELECTRICALMACHINES-I QUESTUION BANK ELECTRICALMACHINES-I QUESTUION BANK UNIT-I INTRODUCTION OF MAGNETIC MATERIAL PART A 1. What are the three basic rotating Electric machines? 2. Name the three materials used in machine manufacture. 3. What

More information

The initial magnetization curve shows the magnetic flux density that would result when an increasing magnetic field is applied to an initially

The initial magnetization curve shows the magnetic flux density that would result when an increasing magnetic field is applied to an initially MAGNETIC CIRCUITS The study of magnetic circuits is important in the study of energy systems since the operation of key components such as transformers and rotating machines (DC machines, induction machines,

More information

Magnetic Quantities. Magnetic fields are described by drawing flux lines that represent the magnetic field.

Magnetic Quantities. Magnetic fields are described by drawing flux lines that represent the magnetic field. Chapter 7 Magnetic fields are described by drawing flux lines that represent the magnetic field. Where lines are close together, the flux density is higher. Where lines are further apart, the flux density

More information

Electromagnetic Induction & Inductors

Electromagnetic Induction & Inductors Electromagnetic Induction & Inductors 1 Revision of Electromagnetic Induction and Inductors (Much of this material has come from Electrical & Electronic Principles & Technology by John Bird) Magnetic Field

More information

Chapter 7. Chapter 7. Electric Circuits Fundamentals - Floyd. Copyright 2007 Prentice-Hall

Chapter 7. Chapter 7. Electric Circuits Fundamentals - Floyd. Copyright 2007 Prentice-Hall Chapter 7 Magnetic Quantities Magnetic fields are described by drawing flux lines that represent the magnetic field. Where lines are close together, the flux density is higher. Where lines are further

More information

COLLEGE PHYSICS Chapter 23 ELECTROMAGNETIC INDUCTION, AC CIRCUITS, AND ELECTRICAL TECHNOLOGIES

COLLEGE PHYSICS Chapter 23 ELECTROMAGNETIC INDUCTION, AC CIRCUITS, AND ELECTRICAL TECHNOLOGIES COLLEGE PHYSICS Chapter 23 ELECTROMAGNETIC INDUCTION, AC CIRCUITS, AND ELECTRICAL TECHNOLOGIES Induced emf: Faraday s Law and Lenz s Law We observe that, when a magnet is moved near a conducting loop,

More information

Revision Guide for Chapter 15

Revision Guide for Chapter 15 Revision Guide for Chapter 15 Contents Revision Checklist Revision otes Transformer...4 Electromagnetic induction...4 Lenz's law...5 Generator...6 Electric motor...7 Magnetic field...9 Magnetic flux...

More information

Equal Pitch and Unequal Pitch:

Equal Pitch and Unequal Pitch: Equal Pitch and Unequal Pitch: Equal-Pitch Multiple-Stack Stepper: For each rotor stack, there is a toothed stator segment around it, whose pitch angle is identical to that of the rotor (θs = θr). A stator

More information

ROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES I

ROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES I ROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR-621220 DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES I Unit I Introduction 1. What are the three basic types

More information

Texas A & M University Department of Mechanical Engineering MEEN 364 Dynamic Systems and Controls Dr. Alexander G. Parlos

Texas A & M University Department of Mechanical Engineering MEEN 364 Dynamic Systems and Controls Dr. Alexander G. Parlos Texas A & M University Department of Mechanical Engineering MEEN 364 Dynamic Systems and Controls Dr. Alexander G. Parlos Lecture 6: Modeling of Electromechanical Systems Principles of Motor Operation

More information

Application Of Faraday s Law

Application Of Faraday s Law Application Of Faraday s Law Dr Miguel Cavero September 2, 2014 Application Of Faraday s Law September 2, 2014 1 / 23 The PHYS120 Exam will be divided into three sections as follows: Section A: Short Questions

More information

EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5 - ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3. OUTCOME 3 - MAGNETISM and INDUCTION

EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5 - ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3. OUTCOME 3 - MAGNETISM and INDUCTION EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT 5 - ELECTRICAL AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 3 - MAGNETISM and INDUCTION 3 Understand the principles and properties of magnetism Magnetic field:

More information

Electrical Machines and Energy Systems: Operating Principles (Part 2) SYED A Rizvi

Electrical Machines and Energy Systems: Operating Principles (Part 2) SYED A Rizvi Electrical Machines and Energy Systems: Operating Principles (Part 2) SYED A Rizvi AC Machines Operating Principles: Synchronous Motor In synchronous motors, the stator of the motor has a rotating magnetic

More information

Electrics. Electromagnetism

Electrics. Electromagnetism Electrics Electromagnetism Electromagnetism Magnetism is associated with charges in motion (currents): microscopic currents in the atoms of magnetic materials. macroscopic currents in the windings of an

More information

Chapter 15 Magnetic Circuits and Transformers

Chapter 15 Magnetic Circuits and Transformers Chapter 15 Magnetic Circuits and Transformers Chapter 15 Magnetic Circuits and Transformers 1. Understand magnetic fields and their interactio with moving charges. 2. Use the right-hand rule to determine

More information

Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction. Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law

Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction. Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law Chapter 27, 28 & 29: Magnetism & Electromagnetic Induction Magnetic flux Faraday s and Lenz s law Electromagnetic Induction Ampere s law 1 Magnetic Flux and Faraday s Law of Electromagnetic Induction We

More information

PHYS 1442 Section 004 Lecture #14

PHYS 1442 Section 004 Lecture #14 PHYS 144 Section 004 Lecture #14 Wednesday March 5, 014 Dr. Chapter 1 Induced emf Faraday s Law Lenz Law Generator 3/5/014 1 Announcements After class pickup test if you didn t Spring break Mar 10-14 HW7

More information

Chapter 23 Magnetic Flux and Faraday s Law of Induction

Chapter 23 Magnetic Flux and Faraday s Law of Induction Chapter 23 Magnetic Flux and Faraday s Law of Induction 1 Overview of Chapter 23 Induced Electromotive Force Magnetic Flux Faraday s Law of Induction Lenz s Law Mechanical Work and Electrical Energy Generators

More information

ELECTROMAGNETIC INDUCTION AND FARADAY S LAW

ELECTROMAGNETIC INDUCTION AND FARADAY S LAW ELECTROMAGNETIC INDUCTION AND FARADAY S LAW Magnetic Flux The emf is actually induced by a change in the quantity called the magnetic flux rather than simply py by a change in the magnetic field Magnetic

More information

Prof. Krishna Vasudevan, Prof. G. Sridhara Rao, Prof. P. Sasidhara Rao

Prof. Krishna Vasudevan, Prof. G. Sridhara Rao, Prof. P. Sasidhara Rao 2 Basic Principles As mentioned earlier the transformer is a static device working on the principle of Faraday s law of induction. Faraday s law states that a voltage appears across the terminals of an

More information

Dynamic Fields, Maxwell s Equations (Chapter 6)

Dynamic Fields, Maxwell s Equations (Chapter 6) Dynamic Fields, Maxwell s Equations (Chapter 6) So far, we have studied static electric and magnetic fields. In the real world, however, nothing is static. Static fields are only approximations when the

More information

SYLLABUS(EE-205-F) SECTION-B

SYLLABUS(EE-205-F) SECTION-B SYLLABUS(EE-205-F) SECTION-A MAGNETIC CIRCUITS AND INDUCTION: Magnetic Circuits, Magnetic Materials and their properties, static and dynamic emfs and dforce on current carrying conductor, AC operation

More information

Chapter 23 Magnetic Flux and Faraday s Law of Induction

Chapter 23 Magnetic Flux and Faraday s Law of Induction Chapter 23 Magnetic Flux and Faraday s Law of Induction Recall: right hand rule 2 10/28/2013 Units of Chapter 23 Induced Electromotive Force Magnetic Flux Faraday s Law of Induction Lenz s Law Mechanical

More information

Basic Electrical Engineering SYLLABUS. Total No. of Lecture Hrs. : 50 Exam Marks : 80

Basic Electrical Engineering SYLLABUS. Total No. of Lecture Hrs. : 50 Exam Marks : 80 SYLLABUS Subject Code: /25 No. of Lecture Hrs./ Week : 04 IA Marks : 20 Exam Hours : 03 Total No. of Lecture Hrs. : 50 Exam Marks : 80 Course objectives: Impart a basic knowledge of electrical quantities

More information

LAB REPORT: THREE-PHASE INDUCTION MACHINE

LAB REPORT: THREE-PHASE INDUCTION MACHINE LAB REPORT: THREE-PHASE INDUCTION MACHINE ANDY BENNETT 1. Summary This report details the operation, modelling and characteristics of a three-phase induction machine. It attempts to provide a concise overview

More information

Magnetism is associated with charges in motion (currents):

Magnetism is associated with charges in motion (currents): Electrics Electromagnetism Electromagnetism Magnetism is associated with charges in motion (currents): microscopic currents in the atoms of magnetic materials. macroscopic currents in the windings of an

More information

DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION

DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION DO PHYSICS ONLINE MOTORS AND GENERATORS FARADAY S LAW ELECTROMAGNETIC INDUCTION English Michael Faraday (1791 1867) who experimented with electric and magnetic phenomena discovered that a changing magnetic

More information

Sliding Conducting Bar

Sliding Conducting Bar Motional emf, final For equilibrium, qe = qvb or E = vb A potential difference is maintained between the ends of the conductor as long as the conductor continues to move through the uniform magnetic field

More information

Chapter 5 Three phase induction machine (1) Shengnan Li

Chapter 5 Three phase induction machine (1) Shengnan Li Chapter 5 Three phase induction machine (1) Shengnan Li Main content Structure of three phase induction motor Operating principle of three phase induction motor Rotating magnetic field Graphical representation

More information

Unit 8: Electromagnetism

Unit 8: Electromagnetism Multiple Choice Portion Unit 8: Electromagnetism 1. Four compasses are placed around a conductor carrying a current into the page, as shown below. Which compass correctly shows the direction of the magnetic

More information

Version The diagram below represents lines of magnetic flux within a region of space.

Version The diagram below represents lines of magnetic flux within a region of space. 1. The diagram below represents lines of magnetic flux within a region of space. 5. The diagram below shows an electromagnet made from a nail, a coil of insulated wire, and a battery. The magnetic field

More information

Module 3 Electrical Fundamentals

Module 3 Electrical Fundamentals 3.1 Electron Theory Structure and distribution of electrical charges within: atoms, molecules, ions, compounds; Molecular structure of conductors, semiconductors and insulators. 3.2 Static Electricity

More information

Automatic Control Systems. -Lecture Note 15-

Automatic Control Systems. -Lecture Note 15- -Lecture Note 15- Modeling of Physical Systems 5 1/52 AC Motors AC Motors Classification i) Induction Motor (Asynchronous Motor) ii) Synchronous Motor 2/52 Advantages of AC Motors i) Cost-effective ii)

More information

Review of Basic Electrical and Magnetic Circuit Concepts EE

Review of Basic Electrical and Magnetic Circuit Concepts EE Review of Basic Electrical and Magnetic Circuit Concepts EE 442-642 Sinusoidal Linear Circuits: Instantaneous voltage, current and power, rms values Average (real) power, reactive power, apparent power,

More information

Physics for Scientists & Engineers 2

Physics for Scientists & Engineers 2 Induction Physics for Scientists & Engineers 2 Spring Semester 2005 Lecture 25! Last week we learned that a current-carrying loop in a magnetic field experiences a torque! If we start with a loop with

More information

Introduction. Energy is needed in different forms: Light bulbs and heaters need electrical energy Fans and rolling miles need mechanical energy

Introduction. Energy is needed in different forms: Light bulbs and heaters need electrical energy Fans and rolling miles need mechanical energy Introduction Energy is needed in different forms: Light bulbs and heaters need electrical energy Fans and rolling miles need mechanical energy What does AC and DC stand for? Electrical machines Motors

More information

Applied Electronics and Electrical Machines

Applied Electronics and Electrical Machines School of Electrical and Computer Engineering Applied Electronics and Electrical Machines (ELEC 365) Fall 2015 DC Machines 1 DC Machines Key educational goals: Develop the basic principle of operation

More information

SECOND ENGINEER REG III/2 MARINE ELECTRO-TECHNOLOGY. 1. Understands the physical construction and characteristics of basic components.

SECOND ENGINEER REG III/2 MARINE ELECTRO-TECHNOLOGY. 1. Understands the physical construction and characteristics of basic components. SECOND ENGINEER REG III/ MARINE ELECTRO-TECHNOLOGY LIST OF TOPICS A B C D Electric and Electronic Components Electric Circuit Principles Electromagnetism Electrical Machines The expected learning outcome

More information

Electric Machines I Three Phase Induction Motor. Dr. Firas Obeidat

Electric Machines I Three Phase Induction Motor. Dr. Firas Obeidat Electric Machines I Three Phase Induction Motor Dr. Firas Obeidat 1 Table of contents 1 General Principles 2 Construction 3 Production of Rotating Field 4 Why Does the Rotor Rotate 5 The Slip and Rotor

More information

IE1206 Embedded Electronics

IE1206 Embedded Electronics IE1206 Embedded Electronics Le1 Le3 Le4 Le2 Ex1 Ex2 PIC-block Documentation, Seriecom Pulse sensors I, U, R, P, series and parallel KC1 LAB1 Pulse sensors, Menu program Start of programing task Kirchhoffs

More information

Part 4: Electromagnetism. 4.1: Induction. A. Faraday's Law. The magnetic flux through a loop of wire is

Part 4: Electromagnetism. 4.1: Induction. A. Faraday's Law. The magnetic flux through a loop of wire is 1 Part 4: Electromagnetism 4.1: Induction A. Faraday's Law The magnetic flux through a loop of wire is Φ = BA cos θ B A B = magnetic field penetrating loop [T] A = area of loop [m 2 ] = angle between field

More information

1. An isolated stationary point charge produces around it. a) An electric field only. b) A magnetic field only. c) Electric as well magnetic fields.

1. An isolated stationary point charge produces around it. a) An electric field only. b) A magnetic field only. c) Electric as well magnetic fields. 1. An isolated stationary point charge produces around it. a) An electric field only. b) A magnetic field only. c) Electric as well magnetic fields. 2. An isolated moving point charge produces around it.

More information

Induction. Chapter 29. PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman. Lectures by James Pazun

Induction. Chapter 29. PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman. Lectures by James Pazun Chapter 29 Electromagnetic Induction PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman Lectures by James Pazun 29. Electromagnetic induction 1. Magnetic flux/faraday

More information

PHYSICS Fall Lecture 15. Electromagnetic Induction and Faraday s Law

PHYSICS Fall Lecture 15. Electromagnetic Induction and Faraday s Law PHYSICS 1444-001 Fall 2012 Lecture 15 Electromagnetic Induction and Faraday s Law A current can be produced by a changing magnetic field First shown in an experiment by Michael Faraday Induced emf A primary

More information

Slide 1 / 50. Electromagnetic Induction and Faraday s Law

Slide 1 / 50. Electromagnetic Induction and Faraday s Law Slide 1 / 50 Electromagnetic Induction and Faraday s Law Slide 2 / 50 Electromagnetic Induction and Faraday s Law Induced EMF Faraday s Law of Induction Lenz s Law EMF Induced in a Moving Conductor Changing

More information

General Physics II. Electromagnetic Induction and Electromagnetic Waves

General Physics II. Electromagnetic Induction and Electromagnetic Waves General Physics II Electromagnetic Induction and Electromagnetic Waves 1 Induced emf We have seen that an electric current produces a magnetic field. Michael Faraday demonstrated that a magnetic field

More information

IE1206 Embedded Electronics Le2

IE1206 Embedded Electronics Le2 Le1 Le3 Le4 Le6 Le8 IE1206 Embedded Electronics Le2 Ex1 Ex2 Ex4 Ex5 PIC-block Documentation, Seriecom Pulse sensors I, U, R, P, serial and parallel KC1 LAB1 Pulse sensors, Menu program Kirchhoffs laws

More information

Chapter 2: Fundamentals of Magnetism. 8/28/2003 Electromechanical Dynamics 1

Chapter 2: Fundamentals of Magnetism. 8/28/2003 Electromechanical Dynamics 1 Chapter 2: Fundamentals of Magnetism 8/28/2003 Electromechanical Dynamics 1 Magnetic Field Intensity Whenever a magnetic flux, φ, exist in a conductor or component, it is due to the presence of a magnetic

More information

Demo: Solenoid and Magnet. Topics. Chapter 22 Electromagnetic Induction. EMF Induced in a Moving Conductor

Demo: Solenoid and Magnet. Topics. Chapter 22 Electromagnetic Induction. EMF Induced in a Moving Conductor Topics Chapter 22 Electromagnetic Induction EMF Induced in a Moving Conductor Magnetic Flux EMF Induced in a Moving Conductor Demo: Solenoid and Magnet v 1 EMF Induced in a Moving Conductor q Work done

More information

PHYS 202 Notes, Week 6

PHYS 202 Notes, Week 6 PHYS 202 Notes, Week 6 Greg Christian February 23 & 25, 2016 Last updated: 02/25/2016 at 12:36:40 This week we learn about electromagnetic induction. Magnetic Induction This section deals with magnetic

More information

JRE SCHOOL OF Engineering

JRE SCHOOL OF Engineering JRE SCHOOL OF Engineering Class Test-1 Examinations September 2014 Subject Name Electromechanical Energy Conversion-II Subject Code EEE -501 Roll No. of Student Max Marks 30 Marks Max Duration 1 hour Date

More information

FB-DC6 Electric Circuits: Magnetism and Electromagnetism

FB-DC6 Electric Circuits: Magnetism and Electromagnetism CREST Foundation Electrical Engineering: DC Electric Circuits Kuphaldt FB-DC6 Electric Circuits: Magnetism and Electromagnetism Contents 1. Electromagnetism 2. Magnetic units of measurement 3. Permeability

More information

Lecture 1: Induction Motor

Lecture 1: Induction Motor 1 / 22 Lecture 1: Induction Motor ELEC-E8402 Control of Electric Drives and Power Converters (5 ECTS) Marko Hinkkanen Aalto University School of Electrical Engineering Spring 2016 2 / 22 Learning Outcomes

More information

Chapter 30. Inductance

Chapter 30. Inductance Chapter 30 Inductance Self Inductance When a time dependent current passes through a coil, a changing magnetic flux is produced inside the coil and this in turn induces an emf in that same coil. This induced

More information

Lecture 24. April 5 th, Magnetic Circuits & Inductance

Lecture 24. April 5 th, Magnetic Circuits & Inductance Lecture 24 April 5 th, 2005 Magnetic Circuits & Inductance Reading: Boylestad s Circuit Analysis, 3 rd Canadian Edition Chapter 11.1-11.5, Pages 331-338 Chapter 12.1-12.4, Pages 341-349 Chapter 12.7-12.9,

More information

EC T32 - ELECTRICAL ENGINEERING

EC T32 - ELECTRICAL ENGINEERING EC T32 - ELECTRICAL ENGINEERING UNIT-I - TRANSFORMER 1. What is a transformer? 2. Briefly explain the principle of operation of transformers. 3. What are the parts of a transformer? 4. What are the types

More information

ELECTRIC MACHINE TORQUE PRODUCTION 101

ELECTRIC MACHINE TORQUE PRODUCTION 101 ELECTRIC MACHINE TORQUE PRODUCTION 101 Best Electric Machine, 014 INTRODUCTION: The following discussion will show that the symmetrical (or true dual-ported) transformer electric machine as only provided

More information

David J. Starling Penn State Hazleton PHYS 212

David J. Starling Penn State Hazleton PHYS 212 and and The term inductance was coined by Oliver Heaviside in February 1886. David J. Starling Penn State Hazleton PHYS 212 and We have seen electric flux: Φ E = E d A But we can define the magnetic flux

More information

Electromagnetic Induction and Faraday s Law

Electromagnetic Induction and Faraday s Law Electromagnetic Induction and Faraday s Law Induced EMF Almost 200 years ago, Faraday looked for evidence that a magnetic field would induce an electric current with this apparatus: He found no evidence

More information

Chapter 5: Electromagnetic Induction

Chapter 5: Electromagnetic Induction Chapter 5: Electromagnetic Induction 5.1 Magnetic Flux 5.1.1 Define and use magnetic flux Magnetic flux is defined as the scalar product between the magnetic flux density, B with the vector of the area,

More information

Chapter 22. Induction

Chapter 22. Induction Chapter 22 Induction Induced emf A current can be produced by a changing magnetic field First shown in an experiment by Michael Faraday A primary coil is connected to a battery A secondary coil is connected

More information

Slide 1 / 50. Slide 2 / 50. Slide 3 / 50. Electromagnetic Induction and Faraday s Law. Electromagnetic Induction and Faraday s Law.

Slide 1 / 50. Slide 2 / 50. Slide 3 / 50. Electromagnetic Induction and Faraday s Law. Electromagnetic Induction and Faraday s Law. Electromagnetic Induction and Faraday s Law Slide 1 / 50 Electromagnetic Induction and Faraday s Law Slide 2 / 50 Induced EMF Faraday s Law of Induction Lenz s Law EMF Induced in a Moving Conductor Changing

More information

EE 742 Chapter 3: Power System in the Steady State. Y. Baghzouz

EE 742 Chapter 3: Power System in the Steady State. Y. Baghzouz EE 742 Chapter 3: Power System in the Steady State Y. Baghzouz Transmission Line Model Distributed Parameter Model: Terminal Voltage/Current Relations: Characteristic impedance: Propagation constant: π

More information

Magnetic field and magnetic poles

Magnetic field and magnetic poles Magnetic field and magnetic poles Magnetic Field B is analogically similar to Electric Field E Electric charges (+ and -)are in analogy to magnetic poles(north:n and South:S). Paramagnetism, Diamagnetism,

More information

PHYS 1444 Section 003 Lecture #18

PHYS 1444 Section 003 Lecture #18 PHYS 1444 Section 003 Lecture #18 Wednesday, Nov. 2, 2005 Magnetic Materials Ferromagnetism Magnetic Fields in Magnetic Materials; Hysteresis Induced EMF Faraday s Law of Induction Lenz s Law EMF Induced

More information

Fachgebiet Leistungselektronik und Elektrische Antriebstechnik. Test Examination: Mechatronics and Electrical Drives

Fachgebiet Leistungselektronik und Elektrische Antriebstechnik. Test Examination: Mechatronics and Electrical Drives Prof. Dr. Ing. Joachim Böcker Test Examination: Mechatronics and Electrical Drives 8.1.214 First Name: Student number: Last Name: Course of Study: Exercise: 1 2 3 Total (Points) (2) (2) (2) (6) Duration:

More information

Step Motor Modeling. Step Motor Modeling K. Craig 1

Step Motor Modeling. Step Motor Modeling K. Craig 1 Step Motor Modeling Step Motor Modeling K. Craig 1 Stepper Motor Models Under steady operation at low speeds, we usually do not need to differentiate between VR motors and PM motors (a hybrid motor is

More information

magneticsp17 September 14, of 17

magneticsp17 September 14, of 17 EXPERIMENT Magnetics Faraday s Law in Coils with Permanent Magnet, DC and AC Excitation OBJECTIVE The knowledge and understanding of the behavior of magnetic materials is of prime importance for the design

More information

FARADAY S AND LENZ LAW B O O K P G

FARADAY S AND LENZ LAW B O O K P G FARADAY S AND LENZ LAW B O O K P G. 4 3 6-438 MOTIONAL EMF AND MAGNETIC FLUX (DERIVIATION) Motional emf = vbl Let a conducting rod being moved through a magnetic field B During time t 0 the rod has been

More information

Michael Faraday. Chapter 31. EMF Produced by a Changing Magnetic Field, 1. Induction. Faraday s Law

Michael Faraday. Chapter 31. EMF Produced by a Changing Magnetic Field, 1. Induction. Faraday s Law Michael Faraday Chapter 31 Faraday s Law Great experimental physicist and chemist 1791 1867 Contributions to early electricity include: Invention of motor, generator, and transformer Electromagnetic induction

More information

Electricity & Optics

Electricity & Optics Physics 24100 Electricity & Optics Lecture 16 Chapter 28 sec. 1-3 Fall 2017 Semester Professor Koltick Magnetic Flux We define magnetic flux in the same way we defined electric flux: φ e = n E da φ m =

More information

CHAPTER 8 DC MACHINERY FUNDAMENTALS

CHAPTER 8 DC MACHINERY FUNDAMENTALS CHAPTER 8 DC MACHINERY FUNDAMENTALS Summary: 1. A Simple Rotating Loop between Curved Pole Faces - The Voltage Induced in a Rotating Loop - Getting DC voltage out of the Rotating Loop - The Induced Torque

More information

SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM

SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM SECTION 3 BASIC AUTOMATIC CONTROLS UNIT 12 BASIC ELECTRICITY AND MAGNETISM Unit Objectives Describe the structure of an atom. Identify atoms with a positive charge and atoms with a negative charge. Explain

More information

DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF EEE PART A. 1. Define mutual inductance and self inductance. (A/M-15)

DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF EEE PART A. 1. Define mutual inductance and self inductance. (A/M-15) DHANALAKSHMI COLLEGE OF ENGINEERING DEPARTMENT OF EEE EE6302-ELECTROMAGNETIC THEORY UNIT 4 PART A 1. Define mutual inductance and self inductance. (A/M-15) Self inductance is the ration between the induced

More information

Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors

Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors Applied and Computational Mechanics 3 (2009) 331 338 Mathematical Modeling and Dynamic Simulation of a Class of Drive Systems with Permanent Magnet Synchronous Motors M. Mikhov a, a Faculty of Automatics,

More information

1 (a) Define magnetic flux [1]

1 (a) Define magnetic flux [1] 1 (a) Define magnetic flux..... [1] (b) Fig. 4.1 shows a generator coil of 5 turns and cross-sectional area 2.5 1 3 m 2 placed in a magnetic field of magnetic flux density.35 T. The plane of the coil is

More information

13. Faraday s Law. S. G. Rajeev. March 3, 2009

13. Faraday s Law. S. G. Rajeev. March 3, 2009 13. Faraday s Law S. G. Rajeev March 3, 009 1 Electromotive Force If a coil moves (or rotates) near a magnet, a current in induced on it, even if it is not connected to a battery. That means an electric

More information

Outside the solenoid, the field lines are spread apart, and at any given distance from the axis, the field is weak.

Outside the solenoid, the field lines are spread apart, and at any given distance from the axis, the field is weak. Applications of Ampere s Law continued. 2. Field of a solenoid. A solenoid can have many (thousands) of turns, and perhaps many layers of windings. The figure shows a simple solenoid with just a few windings

More information

Synchronous Machines

Synchronous Machines Synchronous Machines Synchronous generators or alternators are used to convert mechanical power derived from steam, gas, or hydraulic-turbine to ac electric power Synchronous generators are the primary

More information

Aircraft Powerplant Electrical Systems AMT 109C

Aircraft Powerplant Electrical Systems AMT 109C Aircraft Powerplant Electrical Systems AMT 109C Course Outline Introduction Outline Properties of Matter Review of DC theory Circuits series/parallel Ohm s, Kerchoff s and Henry s Laws Course Outline Power

More information

-magnetic dipoles are largely analogous to electric dipole moments -both types of dipoles

-magnetic dipoles are largely analogous to electric dipole moments -both types of dipoles Student Name Date Manipulating Magnetization Electric dipole moment: Magnetic dipole moment: -magnetic dipoles are largely analogous to electric dipole moments -both types of dipoles -physical separation

More information

Introduction to Synchronous. Machines. Kevin Gaughan

Introduction to Synchronous. Machines. Kevin Gaughan Introduction to Synchronous Machines Kevin Gaughan The Synchronous Machine An AC machine (generator or motor) with a stator winding (usually 3 phase) generating a rotating magnetic field and a rotor carrying

More information

Agenda for Today. Elements of Physics II. Forces on currents

Agenda for Today. Elements of Physics II. Forces on currents Forces on currents Physics 132: Lecture e 14 Elements of Physics II Agenda for Today Currents are moving charges Torque on current loop Torque on rotated loop Currents create B-fields Adding magnetic fields

More information

Electromagnetic Induction

Electromagnetic Induction Chapter II Electromagnetic Induction Day 1 Induced EMF, Faraday s Law and Lenz s Law Sections 21-1 to 21-2 Electromotive Force Electromotive force (EMF ore) is a misnomer, as it is not really a force but

More information

Chapter 21 Magnetic Induction Lecture 12

Chapter 21 Magnetic Induction Lecture 12 Chapter 21 Magnetic Induction Lecture 12 21.1 Why is it called Electromagnetism? 21.2 Magnetic Flux and Faraday s Law 21.3 Lenz s Law and Work-Energy Principles 21.4 Inductance 21.5 RL Circuits 21.6 Energy

More information

Motor-CAD combined electromagnetic and thermal model (January 2015)

Motor-CAD combined electromagnetic and thermal model (January 2015) Motor-CAD combined electromagnetic and thermal model (January 2015) Description The Motor-CAD allows the machine performance, losses and temperatures to be calculated for a BPM machine. In this tutorial

More information

College Physics B - PHY2054C

College Physics B - PHY2054C Force on a Torque on a College - PHY2054C & 09/29/2014 My Office Hours: Tuesday 10:00 AM - Noon 206 Keen Building Outline Force on a Torque on a 1 Force on a Torque on a 2 3 4 Force on a Torque on a Force

More information

DC motors. 1. Parallel (shunt) excited DC motor

DC motors. 1. Parallel (shunt) excited DC motor DC motors 1. Parallel (shunt) excited DC motor A shunt excited DC motor s terminal voltage is 500 V. The armature resistance is 0,5 Ω, field resistance is 250 Ω. On a certain load it takes 20 A current

More information

TRANSFORMERS B O O K P G

TRANSFORMERS B O O K P G TRANSFORMERS B O O K P G. 4 4 4-449 REVIEW The RMS equivalent current is defined as the dc that will provide the same power in the resistor as the ac does on average P average = I 2 RMS R = 1 2 I 0 2 R=

More information