1. The motor effect THE MOTOR EFFECT A current carrying wire will experience a force in the presence of a magnetic field. When the switch is closed a.

Lenzs Law in terms of conservation of energy and relate it to the production of back emf in motors 6)Explain back emf in electric motors. 7)Explain using appropriate sketches the production of eddy currents in terms of Lenzs Law 8)Describe an/ using sketches and labeling the main components of a generator 2)Compare the structure and function of a generator to an electric motor 3)Describe the differences between AC and DC generators 4)Discuss the energy losses that occur as energy is fed through transmission/

GCSE Physics Exam Doctor Electricity – Energy in Circuits Question 1 Question 2 Question 3 Question 4 Question 5.

0.06J per s therefore 7000/0.06 cells are needed = about 117 000 A solar cell is used to power a small electric motor. a)This circuit is set up outside in bright sunlight. The reading on the voltmeter is 3V. i) When the circuit is switched on for /provides 0.06J per s therefore 7000/0.06 cells are needed = about 117 000 A solar cell is used to power a small electric motor. a)This circuit is set up outside in bright sunlight. The reading on the voltmeter is 3V. i) When the circuit is switched on for 200s,/

1 Transmissions for Hybrid Vehicles Image courtesy of General Motors Corp. 2009 Chevy Tahoe.

out. The torque converter clutch must remain applied for the driveline torque to be transferred to the crankshaft. The electric motor/generator is connected to the engine crankshaft on a light or mild hybrid. This allows a conventional automatic transmission to/Mode system is more efficient a simple transmission cooler is sufficient for removal of excess heat from the electric motors. The Duel Mode electrical system is essentially the same as the single mode system. Since the Dual Mode system is more /

PEE401- SOLID STATE DRIVES AND CONTROL UNIT-1 Review of Electric Drives 9/14/20151PALANISAMY MTech.,(PhD)

/201529PALANISAMY MTech.,(PhD) Thermal model of motor for Heating and Cooling when an electrical motor and drive operates, there is a generation of heat inside the motor.electrical motor The amount of heat generated inside the motor should - accurately as possible. That’s why thermal modeling of motor is necessary. The material of the motors and the shapes and size of the motors are not unique but the generation of/

Electric Motors MECH1200. Fundamentals of DC Electric Machinery History Introduction Principle of Operation of Electric Machinery Principle of Operation.

stable position: N S MECH1200 Types of Electric Motors Electric Motors DC Motors Special Purpose Motors Permanent Magnet DC (PMDC) Series Motor Shunt Motor Compounded Motor Induction Motor Synchronous Motor AC Motors Separately Excited motor Stepper motor Brushless DC motor Hysteresis motor Reluctance motor Universal motor MECH1200 Classification of Motors Electric Motors Alternating Current (AC) Motors Direct Current (DC) Motors SynchronousInduction Three-PhaseSingle-Phase Self ExcitedSeparately Excited/

Www.ee.ntou.edu.tw Department of Electrical Engineering, National Taiwan Ocean University Motor Control 5/2/2013 Richard Kuo Assistant Professor.

Engineering, National Taiwan Ocean University www.ee.ntou.edu.tw Electric Motors DC Motor Servo Motor Other Motors Brushless DC motor AC Motor Permanent-magnet DC motor AC Induction Motor AC Synchronous Motor Ultrasonic Voice Coil Motor AC Linear Motor Stepper Motor AC Servo Motor DC Servo Motor Microstepping Motor Department of Electrical Engineering, National Taiwan Ocean University www.ee.ntou.edu.tw DC Servo Motor Department of Electrical Engineering, National Taiwan Ocean University www.ee.ntou.edu.tw/

Electricity. Have you ever stuck a balloon to the wall after rubbing it on your head? Have you ever gotten an electric shock off your door knob? Have.

transfers D.A series of resistors Practice: An electric motor and a generator are different in that _________. A.Electric motors transfer mechanical energy into electric energy, generators do the opposite B.Generators transfer mechanical energy into electric energy, electric motors do the opposite C.Electric motors rely on chemical reactions, generators do not. D.Generators rely on chemical reactions, electric motors do not. NEED Electric Motor & Generator WS Power –Watts (W) Recall from/

Robot and Servo Drive Lab. Department of Electrical Engineering Southern Taiwan University of Science and Technology Advanced Servo Control 11/13/2014.

Hardware and Software Configurations Experimental results Conclusion 2015/10/19 2 Department of Electrical Engineering Southern Taiwan University Abstract The brushless dc (BLDC) motor sensorless control system for an automotive fuel pump that are based on a hysteresis/the rotor speed is greater than 3000 rpm, a sensorless control scheme for the BLDC motor is applied 2015/10/19 36 Department of Electrical Engineering Southern Taiwan University Experiment results This Figure shows the a-phase and c-phase/

Automotive Electricity and Electronics, 2/e By James D Halderman © 2009 Pearson Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ 07458 OBJECTIVES.

with the ignition off. If the seat relay clicks, the circuit breaker is functioning, but the relay or electric motor may be defective. Step 2 Remove the screws or clips that retain the controls to the inner door panel / As with the operation of power windows, power door locks typically use reversible PM nongrounded electric motors. These motors are geared mechanically to the lock- unlock mechanism. Automotive Electricity and Electronics, 2/e By James D Halderman © 2009 Pearson Education, Inc. Pearson /

电气技术专业英语 朱一纶 主编 中国电力出版社. Unit 9 Motor Controller 课件制作 : 吴岱曦.

is shut off when the coil is de-energized. Perhaps the most common industrial use for contactors is the control of electric motors. Contactors typically have multiple contacts, and those contacts are usually (but not always) normally-open （ Fig 9.3 /from excessive current, the normally-closed overload contact will open, de-energizing the contactor sending power to the motor. Large electric motors can be protected from damage through the use of overload heaters and overload contacts of thermal overloads. If /

Automotive Electricity and Electronics, 2/e By James D Halderman © 2009 Pearson Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ 07458 OBJECTIVES.

provide the ground return path for the current that flows through the armature. FIGURE 18-7 This series-wound electric motor shows the basic operation with only two brushes: one hot brush and one ground brush. The current flows /FIGURE 18-14 This wiring diagram illustrates the construction of a shunt-type electric motor. Shunt-type electric motors have the field coils in parallel (or shunt) across the armature as shown. Automotive Electricity and Electronics, 2/e By James D Halderman © 2009 Pearson Education/

1 Electric Machinery Chapter 6 Synchronous Motors Edit by Chi-Shan Yu.

starting, the bars of damper winding are shorted, and the field winding is disconnected from the field voltage The motor will act as an induction motor 53 Electric Machinery Starting the synchronous motor by damper winding 54 Electric Machinery The effect of damper windings on motor stability The damper windings speeds up slow machines and slows down fast machines Thus, the stability can be increased by/

36 Magnetism A moving electric charge is surrounded by a magnetic field.

exerts a force on a current- carrying wire created much excitement. People began harnessing this force for useful purposes— electric meters and electric motors. 36.7 Magnetic Forces on Current-Carrying Wires 36 Magnetism think! What law of physics tells you that if/. c.In a galvanometer, the current changes direction every time the coil makes a whole revolution. d.In an electric motor, the current changes direction every time the coil makes a whole revolution. Answer: B Assessment Questions 36 Magnetism 9./

Energy Saving in Electric Motor Systems. Electric Motors … Electric Motor Systems.

in Electric Motor Systems Electric MotorsElectric Motor Systems The Electric Motor System E= E e * E m Why Motors Are Important Electric motors consume more than 50% of all electricity consumed in the United States (38.5% in IRAN) Industrial electricity Use Industrial Motor Energy Use by Application كل انرژي الكتريكي در شاخه ‌ هاي مختلف مصرف، مطابق آمار وزارت نيرو Motor Content in IRAN : مصرف انرژی موتورهاي الكتريكي در شاخه ‌ هاي مختلف مصرف بزرگترين مصرف كنندگان ( برحسب درصد ): Electricity Consumption/

Model OutlineEngineChassisBodyfor TechnicianBody Electrical Contents Click a Section Tab.

Courtesy Switch Back door courtesy switch signal Vehicle speed signal MS Bus Main Body ECU No.2 Main Body ECU Combination Meter Power Back Door Unit Assembly Opener & Closer Motor Model OutlineEngineChassisBodyfor TechnicianBody Electrical Service Point (Tail Gate System) Service Information ItemsNotes Indicator Light  No mention DTC  (4 DTCs) Can be checked 5-digit DTCs on the Techstream or the Intelligent Tester/

1 School of Electrical Systems Engineering ABD RAHIM 2008 EET421 Power Electronic Drives – Induction Motor – 1ph & concept Abdul Rahim Abdul Razak.

for that application?. 7. Describe the features that make the AC induction motor the most widely used of electric motors?. 8. Describe the difference between the rotating field of multiphase motors and the "apparent" rotating field of single- phase motors?. 9. Explain the operation of split-phase windings in single-phase ac induction motors?. 10. Describe the effects of shaded poles in single-phase, AC induction/

Department of Electrical Engineering Southern Taiwan University of Science and Technology Robot and Servo Drive Lab. 2016/7/8 First-Pulse Technique for.

position and for each of the 6 possible pulses that can be imposed to a star-connected BLDC motor. Department of Electrical Engineering Southern Taiwan University of Science and Technology 2016/7/8 Robot and Servo Drive Lab. 20 First/ more accurate position estimation is not achievable without an additional information, but this is enough for starting up the motor. Department of Electrical Engineering Southern Taiwan University of Science and Technology 2016/7/8 Robot and Servo Drive Lab. 21 First-Pulse /

36 Magnetism A moving electric charge is surrounded by a magnetic field.

exerts a force on a current- carrying wire created much excitement. People began harnessing this force for useful purposes— electric meters and electric motors. 36.7 Magnetic Forces on Current-Carrying Wires 36 Magnetism think! What law of physics tells you that if/. c.In a galvanometer, the current changes direction every time the coil makes a whole revolution. d.In an electric motor, the current changes direction every time the coil makes a whole revolution. Answer: B Assessment Questions 36 Magnetism 9./

36 Magnetism A moving electric charge is surrounded by a magnetic field.

Wires 36 Magnetism …current-carrying wire created much excitement. People began harnessing this force for useful purposes—electric meters and electric motors. 36.7 Magnetic Forces on Current-Carrying Wires 36 Magnetism think! What law of physics tells you that/. In a galvanometer, the current changes direction every time the coil makes a whole revolution. d. In an electric motor, the current changes direction every time the coil makes a whole revolution. Assessment Questions 36 Magnetism 8. Answer: B/

© Copyright 2016Operator Generic Fundamentals Operator Generic Fundamentals Components - AC Motors and Generators.

when flow is increased or decreased. Changes in power can affect the amount of current an electric motor will draw. 74 ELO 3.5 © Copyright 2016Operator Generic Fundamentals Pump Motor Current Relationships 75 ELO 3.5 © Copyright 2016Operator Generic Fundamentals Pump Motor Current Relationships 76 ELO 3.5 © Copyright 2016Operator Generic Fundamentals Pump Motor Current Relationships 77 ELO 3.5 © Copyright 2016Operator Generic Fundamentals Pump/

EV Conversion PDRNovember 1, 2004 1 Battery-Powered Electric Vehicle Conversion: (BEVC) Preliminary Design Review November 1, 2004 Presented By: Ryan Bohm.

will be reused can be properly identified and placed. EV Conversion PDRNovember 1, 2004 10 Drivetrain: Electric Motor A series wound DC motor with the following characteristics will be used: 20 HP (continuous rating) Series wound 96 Volts (/ by moving the temperature control lever. EV Conversion PDRNovember 1, 2004 29 Motor Controller The motor controller delivers current to the electric motor. It also controls the motor voltage. The controller should also have the ability to protect against over-revving/

In 1831, two physicists, Michael Faraday in England and Joseph Henry in the United States, independently discovered that magnetism could produce an electric.

in a closed loop of wire, you induce in the loop a current. voltage. electric field. all of these Answer: D Assessment Questions The essential concept in an electric motor and a generator is Coulomb’s law. Ohm’s law. Faraday’s law. Newton’/s second law. Assessment Questions The essential concept in an electric motor and a generator is Coulomb’s law. Ohm’s law. Faraday’s law. Newton’s second law. Answer: C Assessment Questions A motor and a generator are similar devices. very different devices with different/

+ All about Electric Motors Building a Robot Arm Christopher Lester Yvonne Pelham Douglas Gorham Kapil Dandekar TISP: Montreal 15 – 16 May 2009.

Dandekar TISP: Montreal 15 – 16 May 2009 + Christopher Lester IEEE Educational Activities Exercise 1: Electric Motors 2 + All About Electric Motors Learn basic theory of electric motors Learn basic theory of electro-magnetic forces Apply theory to everyday uses of electric motors Build a working model of an electric motor Objectives for Students 3 + All About Electric Motors Physical Science: Develop an understanding of motion and forces, transfer of energy Develop an/

Introduction to Electrical Machines

in a magnetic field, the conductor experiences a mechanical force. AC Rotating Machines DC machine Induction machine Electrical Machines Synchronous machine AC machine AC Motors Basic Idea A motor uses magnets to create motion. The fundamental law of all magnets: Opposites attract Likes repel. Inside an electric motor, these attracting and repelling forces create rotational motion Basic Idea Magnetic field of a straight conductor The/

Advanced Artificial Lift Methods – PE 571

. ESP Operating Principles Introduction to ESP ESP Operating Principles Electrical submersible pumps are multi-staged centrifugal pumps Each stage consists of a rotating impeller and a stationary diffuser. The performance of the pump depends on the stage design an size, rotational speed and fluid being pumped The rotating movement of the motor is transferred through the shaft to the impeller The overall/

PATRICK COLLINS & JARRED LORUSSO August 28, January 22, 2010

was under 3,000 lbs gross body weight. It had a standard transmission. It fit the criteria for an eligible car to convert to an Electric Vehicle. Electric Vehicle Conversion Budget: Cost of Car- \$1,750 Cost of Electric Motor- \$1,550 Cost of Controller- \$1,495 Clutch less Transmission- \$725 Clutch plates and all brackets \$400 10 Batteries \$2,250 Battery Charger \$1/

Chapter one DC Machines Electrical Machines.

at no load and somewhat at full load Today, brush shifting is only used in very small machines that always run as motors. Electrical Machines Getu.G:getugaa@yahoo.com Fig 1.24 Electrical Machines Getu.G:getugaa@yahoo.com COMMUTATING POLES OR INTERPOLES Because of the requirement that a person must adjust the brush positions of machines as their loads change, another/

ELECTRIC DRIVES Ion Boldea S.A.Nasar 1998 Electric Drives.

Figure 1.12. Components of friction torque, Tfriction Figure 1.13. Mechanical characteristics: a.) d.c. brush motor with separate excitation b.) induction motor c.) synchronous motor Electric Drives Example 1.4. D.C. brush motor drive stability. A permanent magnet d.c. brush motor with the torque speed curve: drives a d.c. generator which supplies a resistive load such that the generator torque / speed/

Motors and Engines Outline Review of Last Time

certain amount of stored or “kinetic” energy. In steady-state, the velocity of the vehicle is constant, and the stored kinetic energy of the vehicle is also constant. Nevertheless, the electric motor in the go-cart consumes a certain amount of power or energy per second while the go-cart was driving at a steady speed.   Where does this energy go? What/

Traction Control of Electric Locomotives

of withstanding voltage fluctuations and temporary interruption of supply. Parallel running usually more than one motor (two or four motors ) should be possible. ADVANTAGE OF ELECTRIC TRACTION . Cheapness. It is cheapest method of all other methods of traction. Cleanliness. / fitted after the rectifier. SEPEX Short form of SEParate EXcitement of traction motors where the armature and field coils of an electric motor are fed with independently controlled current. This has been made much more useful since /

Contacts Gordon Lipscy – Wayne Lu – Charlie Boncelet, PhD -

for determining the circular magnetic field around a current flowing through a conductor - + Electromagnetic Force This Makes Electric Motors Work A current flowing perpendicular to a magnetic field will result in a force on the conductor that is/ of rotation is controlled by the starting technique built into the motor design to initially push it in the desired direction Transformers A transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction/

ELECTRIC DRIVES Ion Boldea S.A.Nasar 1998 Electric Drives.

torque and stator current (as space phasors). Solution: The loss breakdown diagram of the induction motor is shown in figure 8.13. Figure 8.13. Induction motor energy conversion Electric Drives The phase current In (rms) is: (8.112) The input power Pin is:/.125) Finally the amplitude of the stator current , in synchronous coordinates (d.c. quantities) are: (8.126) Electric Drives 8.14. MOTORING, GENERATING, A.C. BRAKING The equivalent circuit for steady state (figure 8.11) shows that the active power in /

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education,

gasoline or diesel, although only gasoline-powered engines are currently used in hybrid vehicles. An electric motor is used to help propel the vehicle, and in some designs, is capable of propelling the/ manufacturers use various hybrid technologies. –Mild Hybrid –Medium Hybrid –Full Hybrid Efficiencies of Electric Motors and Internal Combustion Engines Electric Motors Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson /

of symbols in use should not limit your ability to read and interpret electrical drawings successfully. Power-passing devices: Switches. Wires. Power-consuming devices – Loads: Inductive – motors and coils. Resistive – heaters. Circuit boards (terminals). See next slide./ they consume. Power-consuming devices used in HVACR equipment are generally inductive loads (such as motors) or resistive loads (such as electric heaters). People often think of “loads” as large power-consuming devices in the line-voltage/

Amit Kulshreshtha Moog Inc & Ian Cotton National Grid Senior Lecturer

altogether. Required Insulation Thicknesses Insulation thicknesses must more than double to prevent PD when voltage is doubled Electric Motor Winding Insulation Material Considerations Use of such higher grade PWM/corona resistant (CR) materials developed for / that the minimum spacing between conductors is maintained with added safety margins over the industrial standards. Electric motor windings need careful attention to ensure that voltage stresses remain within acceptable limits The design should be/

Power Electronics and 42 V Automotive Power P. T. Krein Grainger Center for Electric Machinery and Electromechanics Department of Electrical and Computer.

Urbana-Champaign 21 Major Applications Electric power steering.Electric power steering. Two forms: assist pump and direct electric.Two forms: assist pump and direct electric. The assist pump uses an electric motor to drive a conventional hydraulic unit.The assist pump uses an electric motor to drive a conventional hydraulic unit. The direct system uses electric motors with the steering rack.The direct system uses electric motors with the steering rack. In/

Figure 13.1 Comparison of star and delta starting

prepared by Anne McLean Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Figure 13.21 Variable frequency motor drives 25 Copyright  2003 McGraw-Hill Australia Pty Ltd PPTs t/a Electrical Principals for the Electrical Trades 5e by Jenneson Slides prepared by Anne McLean Copyright  2003 McGraw-Hill Australia/

Models of Electric and Hybrid-Electric Propulsion Systems Chapter 4 From the book: ” Vehicle Propulsion Systems” Lino Guzella – Antonio Sciarretta.

For the field circuit, the balance of power is: The input power: The efficiency: Quasistatic Modeling of Electric Motors DC Motor The power losses P 1 -P 2 will be: Compose of three-phase windings. The Kirchoff voltage / Modeling of Electric Motors AC Motor –Rotor By Newton’s second law By a balance of power: The efficiency will be: The power losses Quasistatic Modeling of Electric Motors AC Motor Quasistatic Modeling of Electric Motors Permanent Magnet Synchronous Motors & DC Motor The Kirchoff voltage/

Regenerative Braking System of Electric Vehicle

/4/16 Robot and Servo Drive Lab. Robot and Servo Drive Lab. Abstract Regenerative braking can improve energy usage efficiency and can prolong the driving distance of electric vehicles (EVs). In this paper, BLDC motor control utilizes the traditional roportional–integral–derivative (PID) control. The simulation results show that the fuzzy logic and PID control can realize the regenerative braking and can/

Preliminary Project Plan P08202/5/6/7/8 – RP1 Motor Module

Work Breakdown Structure after we choose our Multiple Team Structure Speak with Dave Hathaway about machine shop capabilities and lead time requirements Establish more baseline kit components – wheels?, steering motor? other materials Question Quick Electrical Disconnect Wing Nuts EMF Cage Tight Space Communications Protocols We plan to establish a minimum standard that all teams must accept a PWM signal to drive their/

Team Hybrid Hoyt MemberSubsystem Sean Frost Electric motor, motor controller, charge controller, charge accumulators Dan Farley Hydraulics system: Pumps,

Electronically Controlled Valve Hydraulic Pump Accumulator 1 Reservoir ICE Input Check Valve 4 Port, 2 Way Electronically Controlled Valve Electronically Controlled Flow Valve Hydraulic Motor Hydraulic Subsystem Overview (Hydraulic Driven Sub-System) Farley Electric Motor Input Accumulator 1 Reservoir Electric Motor Input ICE Input Check Valve 4 Port, 2 Way Electronically Controlled Valve Electronically Controlled Flow Valve Accumulator 2 4 Port, 2 Way Electronically Controlled/

Investigating ways to increase the efficient use of Electrical Energy in the Manufacturing Industry MALTA.

industry. Carry out an extensive Data gathering exercise on Energy Usage and Patterns of Electrical Motor Systems in various local industries Develop a user-friendly software tool to help organisations take intelligent decisions on the options available for reducing electric motors’ energy consumption. Other benefits derived from project: –Knowledge on : electrical motors used in selected manufacturing industries energy savings mechanisms for manufacturing industry –Additional benefits: possibility/

Electrical Motors Wiring S. Christian Mariger Ph.D. Biological Systems Engineering Virginia Tech.

the voltage down to 240 or 120 Volts. Power Delivery Receiving StationBranch Substation Pole TransformerElectric Service Drop (Electrical Motors) Electrical Motors Though lighting and heating are very important, in terms of agricultural structures electrical motors are the most significant application of electrical power. –Ventilation fans –Pumps –Material handling –Etc. Advantages of Electric Motors Efficiency (50 to over 90%) Low initial cost Relatively inexpensive to operate Easy to start Can/

NSF S.P.I.R.I.T. Workshop 2007 Introduction to DC ELECTRIC MOTORS.

Speed, Torque, Gear Ratio Practical considerations Noise, slippage, limits of operation: speed, torque DC Electric Motors Electric Motors or Motors convert electrical energy to mechanical motion Motors are powered by a source of electricity – either AC or DC. DC Electric Motors use Direct Current (DC) sources of electricity: Batteries DC Power supply Principle of How Motors Work: Electrical current flowing in a loop of wire will produce a magnetic field across the loop/

Branch Circuits Chapter 2

of voltages listed? 120 V is RMS voltage. Utilities try to keep it within this range. Brown out—extremely harmful for electric motors on hard to start loads. Compressors Very damaging to electronic equipment. What happens when the voltage drops below 108 V? What / The load on the circuit, amperage, must be determined first. 1 hp = 746 watts, but when determining conductor sizes for electric motors it is common practice to use 1,000 watts per horsepower. Conductor size #3--cont. For this circuit with a 8.75/

The Smart Grid Enabling Energy Efficiency and Demand Response Clark W. Gellings Brevard Community College ETP1400 Distributed Electrical Power Generation.

industrial energy reduction are explored: cogeneration thermal energy storage industrial energy management programs. Motors and Drives Electric motors and drives use 55% of all electricity in the U.S. and 67% in the industrial sector. Induction motors account for 90% of all motors 5HP or greater. It is best to view motors as motor driven systems and address losses in each part of the system. The efficiency of/

Braking Systems University of Jordan

Applications of regenerative braking Super capacitor regenerative braking system. Regenerative braking systems in locomotives. Regenerative braking systems in cars. Regenerative braking systems in scooters. KERS is used in F1 cars. Electric motor braking. By: Mostafa W. Alzahlan Super capacitor regenerative braking system Super capacitor accept and release charge more quickly and can be discharged and recharged many times and with have longer/

ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. Chapter 17 AC Machines.

APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc. 3. Compute electrical and mechanical quantities for ac motors. 4. Use motor nameplate data. 5. Understand the operation and characteristics of three-phase induction motors, three-phase synchronous machines, various types of single- phase ac motors, stepper motors, and brushless dc motors. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Hambley, ©2005 Pearson Education, Inc/

1 Introduction to Electrical Machines. 2 Contents ■ Basic construction and principles ■ DC machines ■ Synchronous machines ■ Induction machines.

Synchronous Machines Construction 13 2. DC Machines 14 3. Synchronous Machines 15 ■ Synchronous Machines: Synchronous Generators: A primary source of electrical energy Synchronous Motors: Used as motors as well as power factor compensators (synchronous condensers) ■ Asynchronous (Induction) Machines: Induction Motors: Most widely used electrical motors in both domestic and industrial applications. Induction Generators: Due to lack of a separate field excitation, these machines are rarely used/

Electric Motors Types of Electric Motors North Seattle Community College HVAC Program Instructor – Mark T. Weber, M.Ed., CMHE Elec motors - 2.

used to move liquids Parts of an Electric Motor Parts: –Stator with motor windings: stationary portion of the motor –Rotor: rotating portion of the motor –Bearings: allow free rotation of the shaft –End bells: supports bearings and/or shaft –Housing: holds all motor components together and facilitates motor mounting Parts of an Electric Motor (cont’d.) Figure 17–3 Individual electric motor parts Electric Motors and Magnetism Electricity and magnetism are used to create/