Generators for wind power conversion
|
|
- Sheila Watts
- 5 years ago
- Views:
Transcription
1 Generators for wind power conversion B. G. Fernandes Department of Electrical Engineering Indian Institute of Technology, Bombay bgf@ee.iitb.ac.in
2 Outline of The Talk Introduction Constant speed wind turbine generator => Types and control Variable speed wind turbine generator => Types and control Axial flux machine for direct driven wind generator Conclusion 2/53
3 Available wind Power The amount of energy the wind turbine can produce is dependent on the wind regime where it is located and efficiency at which it captures energy Wind regime is defined by three characteristics => Average wind velocity => The Weibull distribution of wind velocity => The shear of wind at the turbine location 3/53
4 Wind Resources in India 4/53
5 Wind classes and power density 5/53
6 Fixed Speed η Types of Wind Turbine is more at a particular speed that will result in optimum tip speed ratio Suitable for high wind speed IG is used Variable Speed Optimum tip speed ratio in a certain range of wind speed Change rotor speed with wind speed Higher Energy Capture Suitable for Low wind speed Requires PE interface Either IG or SM 6/53
7 Wind Turbine Model Two dimensional characteristics C p = f ( β, λ) =>Max. value of = =>Varies with ω β = Pitch angle λ = Tip speed ratio Power in Wind A = Swept Area v = Wind velocity ρ = Air Density Pw = 1 ρ Av 2 3 7/53
8 Contd.. Turbine Output Power P = P w C p λ = ω m R v ω m R = Speed of( rotation )Wind Turbine = Radius of rotating Wind Turbine P max = = 1 2 Kω ρc 3 m P (max) A Rω λ K => function of ρ and turbine parameter opt m Sensing rotor speed or frequency of output voltage it is possible to operate at C P(max) 3 8/53
9 C p versus wind speed 9/53
10 Output power versus wind speed 10/53
11 Variation C p with wind speed 11/53
12 Wind Energy Generators 12/53
13 Types of wind energy generators Constant speed with gear box Field wound Synchronous generator Induction generators Variable speed with gear box Field wound Synchronous generator Permanent magnet synchronous generator Doubly fed induction generator Variable speed without gear box ( direct driven) PMSM Axial flux machines 13/53
14 Development Path of Electrical Machines Improvement in (efficiency x Power factor) Increase in torque/weight or power/weight Compact size Better dynamic performance of motor and converter unit High MTBF (Mean Time Between Failures) All benefits at minimum Pay back period 14/53
15 Contd Higher Efficiency Loss reduction Better quality of electrical steel for magnetic circuit (i. e low core losses) Doubly excited: 1) Permanent Magnet 2) Current flowing in a coil 15/53
16 PM Machines New Freedom Magnet strength proportional to depth MMF due to winding is Proportional to its area To reduce size and increase in efficiency, replace coil with PM 16/53
17 PM Machines New Freedom Flexibility in rotor geometry. 17/53
18 PM Machines Concept is not new 1 st by J. Henry (1831) => poor quality hard material (1932) => ALNICO What is NEW? Why we were told that rating of synchronous M/C in MW? Reality : Being used in ceiling fan? ( 40 W) Strong contender for irrigation pumps (2-5kW) 18/53
19 B-H characteristics of PM 19/53
20 Permanent Magnet materials B-H Characteristics 20/53
21 Permanent Magnet Materials PM material development 21/53
22 Magnet volume and (BH)max Minimum volume => Nd FeB magnet Minimum volume => Miniaturization => less weight => Reduced cost Maximum operating Temp. Corrosion 22/53
23 Surface mount PMSM Magnets are mounted on the rotor Large air gap => Armature reaction is negligible. Reluctance is high X d =X q T = 3 Ψ m I s sinσ / 2ω Torque - load angle characteristics similar to cylindrical rotor synchronous motor 23/53
24 Interior PMSM Magnets are buried inside the rotor Rotor is more robust High speed operation Uniform air gap X d less than X q Small air gap => Armature reaction T = {3 Ψ m I s sinσ + (X d -X q )(I s )2 sin(2σ)}/ 2ω Net torque is negative for low values of load angle T max when σ >90 24/53
25 Magnetic flux paths in IPMSM d axis flux path Q axis flux path Stator q - Axis Stator q - Axis S S N N S d - Axis S d - Axis Rotor N S Rotor N S Magnet 25/53
26 Torque-load angle characteristic-ipmsm 5 4 Te1+Te2 3 Te1 Torque 2 1 Te2 0-1 N o lo a d a n g le, Load Angle Where Te 1 and Te 2 are magnet and reluctance torque components. The developed torque is negative=0 and δo. The pull out torque of this type of machine occurs at more than 90º. 26/53
27 Doubly Fed Induction Generator (DFIG) Sub synchronous Generation Speed below synchronous speed Power fed to rotor Total power output = P stator - P rotor Super synchronous Generation Speed above synchronous speed Rotor feeds power to grid Total power output = P stator +P rotor Ps P r Ps Pr Pm Pm 27/53
28 DFIG operation with Back to Back PWM converter Two stage power conversion Independent control of converter Converter of reduced power rating lower voltage rating of the devices Lower dc bus voltage -reduces the capacitor bank rating DFIG Wind turbine Gears grid ac dc dc ac Back to back PWM converter 28/53
29 DFIG operation with Back to Back PWM converter-control Rotor side converter will control the active and reactive power flow in either direction Limited slip range - lower dc bus voltage hence reduces the capacitor bank rating By controlling the phase and amplitude of the grid side converter voltage, flow of active and reactive power can be controlled. Unity power factor operation at the grid terminals possible due to control of reactive power 29/53
30 Direct driven wind generatorwithout gear box Advantages It eliminates expensive gear box and its losses. Variable speed operation allows the turbine to capture higher energy. Disadvantages Direct driven generators are large in diameter. low speed generator have higher losses. 30/53
31 Low speed direct driven PM generator Speed range=30-50 rpm Buried magnet Large no. of poles Flux concentration Low cost ferrites magnets Less noise as gear box is eliminated 31/53
32 Electrical Machines Axial flux Radial flux 32/53
33 Axial Flux Machine High power density. Less winding overhang, Higher flux density Winding with overhang Winding without overhang 33/53
34 AFM basic construction AFM with single stator and rotor Rotor Stator Shaft Disadvantage Strong axial magnetic attraction force between stator and rotor 34/53
35 AFM basic construction A) Single stator & double rotor B) Single rotor & double stator ` Rotor Stator Shaft AFM with multiple stators and multiple rotors 35/53
36 AFM-stator and rotor construction N-N type rotor with toroidal shaped winding B S N Rotor i F B Stator core F i S N Windings arrangement Requires back iron in stator to provide return path for the working flux Reduction in end winding, hence less copper losses 36/53
37 AFM-stator and rotor construction (contd.) N-S type rotor with trapezoidal shaped winding B S N Rotor i F F B i N S Stator core Winding arrangement No need of stator back iron, hence better possibilities of cooling Large end winding connections exits, causing extra I 2 R losses 37/53
38 Flux lines in two rotor configuration N S N S N A) N-N type rotor N S N S N S N S N S B) N-S type rotor N S N S N 38/53
39 AFM- Torque Peak value of current density at radius r is A m m (r) = 2N πr 1 I a (1) R o r I a B Force on the current element Idr is df x = I a g (dr B ) = A(r)(dS B g ) R i (2) Torque at the element Idr is dt = 2 1 Td = α 4 d πα i i k mn w1 t A(r)B K w1 B m m r D 2 2 o dr (1 λ 2 ) I (3) a (4) 39/53
40 Contd D out Selection of the outer diameter = 3 π 2 λk w1 60. εp n s B m out Aηcosφ D α out 3 n s (Taking other parameters to be constant) 1 So less speed requirement Much more increase in outer diameter More slots can be made to achieve higher pole pairs (lower speed) on large diameter) Optimization goal K w1, by the proper selection of winding configuration ε = E f /V 1,depend on winding inductance B m by proper selection of magnet shape and span 40/53
41 Contd Selection of number of turns per phase E f = π 4 2n s N k 1 w1 B m D 2 out (1 λ Where E f is the rms value of the generated emf per phase Where E f is the rms value of the generated emf per phase Optimization goal N 1 = f(e f, k w1,b m,λ), Keeping other quantities to be fixed E f is limited by the rated output/input voltage of machine K w1 and B m are the quantities which can be optimized 2 ) 41/53
42 Design aspects Ratio of inner to outer diameter = λ It is industrial practice to choose λ = 1/ 3 for getting maximum torque output Torque in PU λ 42/53
43 Comparison of AFM with RFM High torque to weight ratio R T = ratio of torque densities of AFM to RFPM R T R T = p π 1+ 4p π 2 p 43/53
44 Torous type axial flux machine low speed wind generator Features Large no.of poles No cogging torque Less resistance High efficiency 44/53
45 Wind Turbine Generator (16 pole configuration) 1 kw, 375 rpm, 110 V, 50 Hz For direct driven wind generator. 45/53
46 Doubly salient PM Machines- Three Phase Flux Reversal Machine Magnets and winding are stationary 6/8 pole configuration n r = n s (n pp +1/3) f =(n n r )/60 Equivalent to 16 pole PMSM PM required are 12 Flux pattern of 2 poles 46/53
47 Flux plot of 6/8 pole FRM Observations Number of rotor poles = 8 Machine is equivalent to 16 Pole PMSM from speed frequency relationship. f =(n n r )/60 Flux pattern of 2 poles 47/53
48 Doubly Salient PM Machine-6/14 pole FRM Sinusoidal induced voltage Stator poles = 6, Rotor poles =14 No. of Flux pattern poles = 2 Machine with fictitious electrical gear (Gear ratio = 14) Advantages of PMSM and SRM Suitable for low speed direct driven Wind Power application 48/53
49 Fictitious Electrical Gear FRM can be analyzed as PMSM with gear Flux pattern speed and rotor speed is different Gear ratio is defined as ratio of flux pattern speed to rotor speed 49/53
50 FRM Gear ratios S.No Machine Configuration No. of Magnets Gear ratio Speed at 50 Hz (rpm) 1 6/8 pole /16 pole /14 pole /28 pole /40 pole Flux pattern poles 50/53
51 Full pitch winding FRM (FPFRM) Electrical angle /slot= 60 deg. Pitch factor of winding = 0.5 (CSPFRM) = 1 (FPFRM) Voltage induced in FPFRM= twice of CSPFRM (for same number of turns and machine size) 51/53
52 Conclusion Direct driven variable speed wind energy conversion systems are more efficient and are possible using PM machines. For low speed operation axial flux machines are preferred FRM topology is suitable for low speed low power application 52/53
53 53/53
Control of Wind Turbine Generators. James Cale Guest Lecturer EE 566, Fall Semester 2014 Colorado State University
Control of Wind Turbine Generators James Cale Guest Lecturer EE 566, Fall Semester 2014 Colorado State University Review from Day 1 Review Last time, we started with basic concepts from physics such as
More informationMassachusetts Institute of Technology Department of Electrical Engineering and Computer Science Electric Machines
Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.685 Electric Machines Problem Set 10 Issued November 11, 2013 Due November 20, 2013 Problem 1: Permanent
More informationPower density improvement of three phase flux reversal machine with distributed winding
Published in IET Electric Power Applications Received on 4th January 2009 Revised on 2nd April 2009 ISSN 1751-8660 Power density improvement of three phase flux reversal machine with distributed winding
More informationAnalytical Model for Sizing the Magnets of Permanent Magnet Synchronous Machines
Journal of Electrical Engineering 3 (2015) 134-141 doi: 10.17265/2328-2223/2015.03.004 D DAVID PUBLISHING Analytical Model for Sizing Magnets of Permanent Magnet Synchronous Machines George Todorov and
More informationROEVER 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 informationIntroduction 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 informationDoubly salient reluctance machine or, as it is also called, switched reluctance machine. [Pyrhönen et al 2008]
Doubly salient reluctance machine or, as it is also called, switched reluctance machine [Pyrhönen et al 2008] Pros and contras of a switched reluctance machine Advantages Simple robust rotor with a small
More informationUNIT I INTRODUCTION Part A- Two marks questions
ROEVER COLLEGE OF ENGINEERING & TECHNOLOGY ELAMBALUR, PERAMBALUR-621220 DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING DESIGN OF ELECTRICAL MACHINES UNIT I INTRODUCTION 1. Define specific magnetic
More information3 d Calculate the product of the motor constant and the pole flux KΦ in this operating point. 2 e Calculate the torque.
Exam Electrical Machines and Drives (ET4117) 11 November 011 from 14.00 to 17.00. This exam consists of 5 problems on 4 pages. Page 5 can be used to answer problem 4 question b. The number before a question
More informationUniversity of Jordan Faculty of Engineering & Technology Electric Power Engineering Department
University of Jordan Faculty of Engineering & Technology Electric Power Engineering Department EE471: Electrical Machines-II Tutorial # 2: 3-ph Induction Motor/Generator Question #1 A 100 hp, 60-Hz, three-phase
More informationPermanent Magnet Wind Generator Technology for Battery Charging Wind Energy Systems
Permanent Magnet Wind Generator Technology for Battery Charging Wind Energy Systems Casper J. J. Labuschagne, Maarten J. Kamper Electrical Machines Laboratory Dept of Electrical and Electronic Engineering
More informationAn 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 informationProceedings of the 6th WSEAS/IASME Int. Conf. on Electric Power Systems, High Voltages, Electric Machines, Tenerife, Spain, December 16-18,
Proceedings of the 6th WSEAS/IASME Int. Conf. on Electric Power Systems, High Voltages, Electric Machines, Tenerife, Spain, December 16-18, 2006 196 A Method for the Modeling and Analysis of Permanent
More informationSynchronous 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 informationUnified Torque Expressions of AC Machines. Qian Wu
Unified Torque Expressions of AC Machines Qian Wu Outline 1. Review of torque calculation methods. 2. Interaction between two magnetic fields. 3. Unified torque expression for AC machines. Permanent Magnet
More informationSTAR-CCM+ and SPEED for electric machine cooling analysis
STAR-CCM+ and SPEED for electric machine cooling analysis Dr. Markus Anders, Dr. Stefan Holst, CD-adapco Abstract: This paper shows how two well established software programs can be used to determine the
More informationDesign and analysis of Axial Flux Permanent Magnet Generator for Direct-Driven Wind Turbines
Design and analysis of Axial Flux Permanent Magnet Generator for Direct-Driven Wind Turbines Sung-An Kim, Jian Li, Da-Woon Choi, Yun-Hyun Cho Dep. of Electrical Engineering 37, Nakdongdae-ro, 55beon-gil,
More informationUNIT-I INTRODUCTION. 1. State the principle of electromechanical energy conversion.
UNIT-I INTRODUCTION 1. State the principle of electromechanical energy conversion. The mechanical energy is converted in to electrical energy which takes place through either by magnetic field or electric
More informationd-q Equivalent Circuit Representation of Three-Phase Flux Reversal Machine with Full Pitch Winding
d-q Equivalent Circuit epresentation of Three-Phase Flux eversal Machine with Full Pitch Winding D. S. More, Hari Kalluru and B. G. Fernandes Department of Electrical Engineering, Indian Institute of Technology
More informationChapter 4. Synchronous Generators. Basic Topology
Basic Topology Chapter 4 ynchronous Generators In stator, a three-phase winding similar to the one described in chapter 4. ince the main voltage is induced in this winding, it is also called armature winding.
More informationDESIGN AND ANALYSIS OF AXIAL-FLUX CORELESS PERMANENT MAGNET DISK GENERATOR
DESIGN AND ANALYSIS OF AXIAL-FLUX CORELESS PERMANENT MAGNET DISK GENERATOR Łukasz DR ZIKOWSKI Włodzimierz KOCZARA Institute of Control and Industrial Electronics Warsaw University of Technology, Warsaw,
More informationRevision 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 informationSynchronous Machines
Synchronous machine 1. Construction Generator Exciter View of a twopole round rotor generator and exciter. A Stator with laminated iron core C Slots with phase winding B A B Rotor with dc winding B N S
More informationEEE3405 ELECTRICAL ENGINEERING PRINCIPLES 2 - TEST
ATTEMPT ALL QUESTIONS (EACH QUESTION 20 Marks, FULL MAKS = 60) Given v 1 = 100 sin(100πt+π/6) (i) Find the MS, period and the frequency of v 1 (ii) If v 2 =75sin(100πt-π/10) find V 1, V 2, 2V 1 -V 2 (phasor)
More informationOptimal Design of PM Axial Field Motor Based on PM Radial Field Motor Data
Optimal Design of PM Axial Field Motor Based on PM Radial Field Motor Data GOGA CVETKOVSKI LIDIJA PETKOVSKA Faculty of Electrical Engineering Ss. Cyril and Methodius University Karpos II b.b. P.O. Box
More informationELECTRICALMACHINES-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 informationMathematical Modelling of Permanent Magnet Synchronous Motor with Rotor Frame of Reference
Mathematical Modelling of Permanent Magnet Synchronous Motor with Rotor Frame of Reference Mukesh C Chauhan 1, Hitesh R Khunt 2 1 P.G Student (Electrical),2 Electrical Department, AITS, rajkot 1 mcchauhan1@aits.edu.in
More informationFinite Element Analysis of Hybrid Excitation Axial Flux Machine for Electric Cars
223 Finite Element Analysis of Hybrid Excitation Axial Flux Machine for Electric Cars Pelizari, A. ademir.pelizari@usp.br- University of Sao Paulo Chabu, I.E. ichabu@pea.usp.br - University of Sao Paulo
More informationLoss Minimization Design Using Magnetic Equivalent Circuit for a Permanent Magnet Synchronous Motor
Loss Minimization Design Using Magnetic Equivalent Circuit for a Permanent Magnet Synchronous Motor Daisuke Sato Department of Electrical Engineering Nagaoka University of Technology Nagaoka, Niigata,
More informationMODELING AND HIGH-PERFORMANCE CONTROL OF ELECTRIC MACHINES
MODELING AND HIGH-PERFORMANCE CONTROL OF ELECTRIC MACHINES JOHN CHIASSON IEEE PRESS ü t SERIES ON POWER ENGINEERING IEEE Press Series on Power Engineering Mohamed E. El-Hawary, Series Editor The Institute
More informationDynamic Modeling of Surface Mounted Permanent Synchronous Motor for Servo motor application
797 Dynamic Modeling of Surface Mounted Permanent Synchronous Motor for Servo motor application Ritu Tak 1, Sudhir Y Kumar 2, B.S.Rajpurohit 3 1,2 Electrical Engineering, Mody University of Science & Technology,
More informationPrince Sattam bin Abdulaziz University College of Engineering. Electrical Engineering Department EE 3360 Electrical Machines (II)
Chapter # 4 Three-Phase Induction Machines 1- Introduction (General Principles) Generally, conversion of electrical power into mechanical power takes place in the rotating part of an electric motor. In
More informationLesson 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 informationAXIAL FLUX INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR WITH SINUSOIDALLY SHAPED MAGNETS
AXIAL FLUX INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR WITH SINUSOIDALLY SHAPED MAGNETS A. Parviainen, J. Pyrhönen, M. Niemelä Lappeenranta University of Technology, Department of Electrical Engineering
More informationTutorial 1 (EMD) Rotary field winding
Tutorial 1 (EMD) Rotary field winding The unchorded two-layer three-phase winding of a small synchronous fan drive for a computer has the following parameters: number of slots per pole and phase q = 1,
More informationEE 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 informationLecture (20) DC Machine Examples Start of Synchronous Machines
Lecture (20) DC Machine Examples Start of Synchronous Machines Energy Systems Research Laboratory, FIU All rights reserved. 20-1 Energy Systems Research Laboratory, FIU All rights reserved. 20-2 Ra R f
More informationJRE 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 informationRevision 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 informationGenerators. What its all about
Generators What its all about How do we make a generator? Synchronous Operation Rotor Magnetic Field Stator Magnetic Field Forces and Magnetic Fields Force Between Fields Motoring Generators & motors are
More informationIntroduction. 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 informationChapter 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 informationPESIT Bangalore South Campus Hosur road, 1km before Electronic City, Bengaluru -100 Department of Electronics & Communication Engineering
QUESTION PAPER INTERNAL ASSESSMENT TEST 2 Date : /10/2016 Marks: 0 Subject & Code: BASIC ELECTRICAL ENGINEERING -15ELE15 Sec : F,G,H,I,J,K Name of faculty : Dhanashree Bhate, Hema B, Prashanth V Time :
More informationKeywords: Electric Machines, Rotating Machinery, Stator faults, Fault tolerant control, Field Weakening, Anisotropy, Dual rotor, 3D modeling
Analysis of Electromagnetic Behavior of Permanent Magnetized Electrical Machines in Fault Modes M. U. Hassan 1, R. Nilssen 1, A. Røkke 2 1. Department of Electrical Power Engineering, Norwegian University
More informationSynchronous Machines
Synchronous Machines Synchronous Machines n 1 Φ f n 1 Φ f I f I f I f damper (run-up) winding Stator: similar to induction (asynchronous) machine ( 3 phase windings that forms a rotational circular magnetic
More informationHybrid Excited Vernier Machines with All Excitation Sources on the Stator for Electric Vehicles
Progress In Electromagnetics Research M, Vol. 6, 113 123, 16 Hybrid Excited Vernier Machines with All Excitation Sources on the Stator for Electric Vehicles Liang Xu, Guohai Liu, Wenxiang Zhao *, and Jinghua
More informationPower Density Comparison for Three Phase Non-Slotted Double-Sided AFPM Motors
Australian Journal of Basic and Applied Sciences, 4(1): 5947-5955, 010 ISSN 1991-8178 Power Density Comparison for hree Phase Non-Slotted Double-Sided AFPM Motors S. Asghar Gholamian and A. Yousefi Electrical
More informationFlux: Examples of Devices
Flux: Examples of Devices xxx Philippe Wendling philippe.wendling@magsoft-flux.com Create, Design, Engineer! www.magsoft-flux.com www.cedrat.com Solenoid 2 1 The Domain Axisymmetry Open Boundary 3 Mesh
More informationLecture 7: Synchronous Motor Drives
1 / 46 Lecture 7: Synchronous Motor Drives ELEC-E8402 Control of Electric Drives and Power Converters (5 ECTS) Marko Hinkkanen Spring 2017 2 / 46 Learning Outcomes After this lecture and exercises you
More informationElectric 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 informationLESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES
ET 332b Ac Motors, Generators and Power Systems LESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES 1 LEARNING OBJECTIVES After this presentation you will be able to: Interpret alternator phasor diagrams
More informationNEPTUNE -code: KAUVG11ONC Prerequisites:... Knowledge description:
Subject name: Electrical Machines Credits: 9 Requirement : Course director: Dr. Vajda István Position: Assessment and verification procedures: NEPTUNE -code: KAUVG11ONC Prerequisites:... Number of hours:
More informationDesign of the Forced Water Cooling System for a Claw Pole Transverse Flux Permanent Magnet Synchronous Motor
Design of the Forced Water Cooling System for a Claw Pole Transverse Flux Permanent Magnet Synchronous Motor Ahmad Darabi 1, Ali Sarreshtehdari 2, and Hamed Tahanian 1 1 Faculty of Electrical and Robotic
More informationOptimisation of Inner Diameter to Outer Diameter Ratio of Axial Flux Permanent Magnet Generator
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 220-1, Volume 9, Issue 6 Ver. III (Nov Dec. 2014), PP 4-47 Optimisation of Inner Diameter to Outer Diameter
More informationON THE PARAMETERS COMPUTATION OF A SINGLE SIDED TRANSVERSE FLUX MOTOR
ON THE PARAMETERS COMPUTATION OF A SINGLE SIDED TRANSVERSE FLUX MOTOR Henneberger, G. 1 Viorel, I. A. Blissenbach, R. 1 Popan, A.D. 1 Department of Electrical Machines, RWTH Aachen, Schinkelstrasse 4,
More informationInduction Motors. The single-phase induction motor is the most frequently used motor in the world
Induction Motor The single-phase induction motor is the most frequently used motor in the world Most appliances, such as washing machines and refrigerators, use a single-phase induction machine Highly
More informationTRACING OF MAXIMUM POWER DENSITY POINT FOR AXIAL FLUX TORUS TYPE MACHINES USING GENERAL PURPOSE SIZING EQUATIONS
TRACING OF MAXIMUM POWER DENSITY POINT FOR AXIAL FLUX TORUS TYPE MACHINES USING GENERAL PURPOSE SIZING EQUATIONS M. Ramanjaneyulu Chowdary Dr.G.S Raju Mr.V.Rameshbabu M.Tech power electronics Former BHU
More informationCHAPTER 3 INFLUENCE OF STATOR SLOT-SHAPE ON THE ENERGY CONSERVATION ASSOCIATED WITH THE SUBMERSIBLE INDUCTION MOTORS
38 CHAPTER 3 INFLUENCE OF STATOR SLOT-SHAPE ON THE ENERGY CONSERVATION ASSOCIATED WITH THE SUBMERSIBLE INDUCTION MOTORS 3.1 INTRODUCTION The electric submersible-pump unit consists of a pump, powered by
More informationAccurate Joule Loss Estimation for Rotating Machines: An Engineering Approach
Accurate Joule Loss Estimation for Rotating Machines: An Engineering Approach Adeeb Ahmed Department of Electrical and Computer Engineering North Carolina State University Raleigh, NC, USA aahmed4@ncsu.edu
More informationBasics of Permanent Magnet - Machines
Basics of Permanent Magnet - Machines 1.1 Principles of energy conversion, force & torque 1.2 Basic design elements 1.3 Selection of PM-Machine topologies 1.4 Evaluation and Comparison Permanent Magnet
More informationSimulations and Control of Direct Driven Permanent Magnet Synchronous Generator
Simulations and Control of Direct Driven Permanent Magnet Synchronous Generator Project Work Dmitry Svechkarenko Royal Institute of Technology Department of Electrical Engineering Electrical Machines and
More informationInternational Journal of Advance Engineering and Research Development SIMULATION OF FIELD ORIENTED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR
Scientific Journal of Impact Factor(SJIF): 3.134 e-issn(o): 2348-4470 p-issn(p): 2348-6406 International Journal of Advance Engineering and Research Development Volume 2,Issue 4, April -2015 SIMULATION
More informationThermal Properties of a Prototype Permanent Magnetized Electrical Motor Embedded in a Rim Driven Thruster
Thermal Properties of a Prototype Permanent Magnetized Electrical Motor Embedded in a Rim Driven Thruster Øystein Krøvel Knut Andresen Normann Sandøy Abstract For machine designs it is usually the thermal
More information6 Chapter 6 Testing and Evaluation
6 Chapter 6 Testing and Evaluation n this chapter the results obtained during the testing of the LS PMSM prototype are provided. The test results are compared with Weg s LS PMSM machine, WQuattro. The
More informationECE 325 Electric Energy System Components 7- Synchronous Machines. Instructor: Kai Sun Fall 2015
ECE 325 Electric Energy System Components 7- Synchronous Machines Instructor: Kai Sun Fall 2015 1 Content (Materials are from Chapters 16-17) Synchronous Generators Synchronous Motors 2 Synchronous Generators
More informationAnalytical Calculation of Air Gap Magnetic Field Distribution in Vernier Motor
IEEE PEDS 017, Honolulu, USA 1-15 June 015 Analytical Calculation of Air Gap Magnetic Field Distribution in Vernier Motor Hyoseok Shi, Noboru Niguchi, and Katsuhiro Hirata Department of Adaptive Machine
More informationConcept Design and Performance Analysis of HTS Synchronous Motor for Ship Propulsion. Jin Zou, Di Hu, Mark Ainslie
Concept Design and Performance Analysis of HTS Synchronous Motor for Ship Propulsion Jin Zou, Di Hu, Mark Ainslie Bulk Superconductivity Group, Engineering Department, University of Cambridge, CB2 1PZ,
More informationLecture 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 informationStatic Analysis of 18-Slot/16-Pole Permanent Magnet Synchronous Motor Using FEA
International Journal of Engineering and Technology Volume 5 No. 3,March, 2015 Static Analysis of 18-Slot/16-Pole Permanent Magnet Synchronous Motor Using FEA M. Rezal 1, Dahaman Ishak 2, M. Sabri 1, Al-Hapis
More informationDefinition Application of electrical machines Electromagnetism: review Analogies between electric and magnetic circuits Faraday s Law Electromagnetic
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
More informationMathematical 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 informationTexas 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 information1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor
1439. Numerical simulation of the magnetic field and electromagnetic vibration analysis of the AC permanent-magnet synchronous motor Bai-zhou Li 1, Yu Wang 2, Qi-chang Zhang 3 1, 2, 3 School of Mechanical
More informationEDEXCEL 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 informationThe 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 informationYou know for EE 303 that electrical speed for a generator equals the mechanical speed times the number of poles, per eq. (1).
Stability 1 1. Introduction We now begin Chapter 14.1 in your text. Our previous work in this course has focused on analysis of currents during faulted conditions in order to design protective systems
More informationDesign, analysis and fabrication of linear permanent magnet synchronous machine
Design, analysis and fabrication of linear permanent magnet synchronous machine Monojit Seal Dept. of Electrical Engineering, IIEST, Shibpur, Howrah - 711103 W.B., India. email: seal.monojit@gmail.com
More informationIEEE Transactions on Applied Superconductivity. Copyright IEEE.
Title Loss analysis of permanent magnet hybrid brushless machines with and without HTS field windings Author(s) Liu, C; Chau, KT; Li, W Citation The 21st International Conference on Magnet Technology,
More informationTutorial Sheet Fig. Q1
Tutorial Sheet - 04 1. The magnetic circuit shown in Fig. Q1 has dimensions A c = A g = 9 cm 2, g = 0.050 cm, l c = 30 cm, and N = 500 turns. Assume the value of the relative permeability,µ r = 70,000
More informationELECTRIC 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 informationEE 410/510: Electromechanical Systems Chapter 4
EE 410/510: Electromechanical Systems Chapter 4 Chapter 4. Direct Current Electric Machines and Motion Devices Permanent Magnet DC Electric Machines Radial Topology Simulation and Experimental Studies
More informationECEN 667 Power System Stability Lecture 18: Voltage Stability, Load Models
ECEN 667 Power System Stability Lecture 18: Voltage Stability, Load Models Prof. Tom Overbye Dept. of Electrical and Computer Engineering Texas A&M University, overbye@tamu.edu 1 Announcements Read Chapter
More informationEXPERIMENTAL COMPARISON OF LAMINATION MATERIAL CASE OF SWITCHING FLUX SYNCHRONOUS MACHINE WITH HYBRID EXCITATION
EXPERIMENTAL COMPARISON OF LAMINATION MATERIAL CASE OF SWITCHING FLUX SYNCHRONOUS MACHINE WITH HYBRID EXCITATION Emmanuel Hoang, Sami Hlioui, Michel Lécrivain, Mohamed Gabsi To cite this version: Emmanuel
More informationDESIGN OF ELECTRICAL APPARATUS SOLVED PROBLEMS
DESIGN OF ELECTRICAL APPARATUS SOLVED PROBLEMS 1. A 350 KW, 500V, 450rpm, 6-pole, dc generator is built with an armature diameter of 0.87m and core length of 0.32m. The lap wound armature has 660 conductors.
More informationDrivetrains. Direct Drive Generators High Temperature Superconductor Based Machines. Daniel McGahn Senior Vice President
Drivetrains Direct Drive Generators High Temperature Superconductor Based Machines Daniel McGahn Senior Vice President AGENDA Wind turbine power conversion Drivetrain evolution Market Driver: Cost of Electricity
More informationThe doubly-fed induction generator in the rotortied configuration
Graduate Theses and Dissertations Graduate College 2014 The doubly-fed induction generator in the rotortied configuration Nicholas David Iowa State University Follow this and additional works at: http://lib.dr.iastate.edu/etd
More informationRESEARCH ON REDUCING COGGING TORQUE IN PERMANENT MAGNET SYNCHRONOUS GENERATORS
U.P.B. Sci. Bull., Series C, Vol. 77, Iss. 3, 2015 ISSN 2286-3540 RESEARCH ON REDUCING COGGING TORQUE IN PERMANENT MAGNET SYNCHRONOUS GENERATORS Ion TRIFU 1 This paper presents different cogging torque
More informationElectrical Machines and Energy Systems: Operating Principles (Part 1) SYED A Rizvi
Electrical Machines and Energy Systems: Operating Principles (Part 1) SYED A Rizvi AC Machines Operating Principles: Rotating Magnetic Field The key to the functioning of AC machines is the rotating magnetic
More informationMassachusetts Institute of Technology Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.685 Electric Machines Class Notes 7: Permanent Magnet Brushless DC Motors September 5, 005 c 005 James
More informationMAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION
Important Instructions to examiners: 1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2) The model answer and the answer written by candidate
More informationTAP 416-3: Alternating current generators
TAP 416-3: Alternating current generators Thinking about generators and induced emf An emf is induced in a coil when the magnetic flux through the coil changes. The emf in volts is numerically equal to
More informationEC 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 informationRegular paper. Design and FE Analysis of BLDC Motor for Electro- Mechanical Actuator
P.Srinivas* J. Electrical Systems 11-1 (2015): 76-88 Regular paper Design and FE Analysis of BLDC Motor for Electro- Mechanical Actuator JES Journal of Electrical Systems This paper presents the design
More informationLecture 8: Sensorless Synchronous Motor Drives
1 / 22 Lecture 8: Sensorless Synchronous Motor Drives ELEC-E8402 Control of Electric Drives and Power Converters (5 ECTS) Marko Hinkkanen Spring 2017 2 / 22 Learning Outcomes After this lecture and exercises
More information4 Finite Element Analysis of a three-phase PM synchronous machine
Assignment 4 1-1 4 Finite Element Analysis of a three-phase PM synchronous machine The goal of the third assignment is to extend your understanding on electromagnetic analysis in FEM. This assignment is
More informationBehaviour of synchronous machine during a short-circuit (a simple example of electromagnetic transients)
ELEC0047 - Power system dynamics, control and stability (a simple example of electromagnetic transients) Thierry Van Cutsem t.vancutsem@ulg.ac.be www.montefiore.ulg.ac.be/~vct October 2018 1 / 25 Objectives
More informationProposal of short armature core double-sided transverse flux type linear synchronous motor
Proposal of short armature core double-sided transverse flux type linear synchronous motor Shin Jung-Seob a, Takafumi Koseki a and Kim Houng-Joong b a The University of Tokyo, Engineering Building #2 12F,7-3-1
More informationLoss analysis of a 1 MW class HTS synchronous motor
Journal of Physics: Conference Series Loss analysis of a 1 MW class HTS synchronous motor To cite this article: S K Baik et al 2009 J. Phys.: Conf. Ser. 153 012003 View the article online for updates and
More informationFinite Element Method based investigation of IPMSM losses
Finite Element Method based investigation of IPMSM losses Martin Schmidtner 1, Prof. Dr. -Ing. Carsten Markgraf 1, Prof. Dr. -Ing. Alexander Frey 1 1. Augsburg University of Applied Sciences, Augsburg,
More informationElectrical 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