DOCSLIB.ORG

Load Test on Single Phase Induction Motor

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Load Test on Single Phase Induction Motor 15EE210L-ELECTRICAL MACHINES LAB-II RECORD ACADEMIC YEAR: ODD SEMESTER 2018-19 NAME : REG.NO. : DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING FACULTY OF ENGINEERING & TECHNOLOGY SRM Institute of Science and Technology (Deemed to be University) S.R.M. NAGAR, KATTANKULATHUR – 603 203 KANCHEEPURAM DISTRICT SRM Institute of Science and Technology (Deemed to be University) S.R.M. NAGAR, KATTANKULATHUR -603 203 KANCHEEPURAM DISTRICT BONAFIDE CERTIFICATE Register No______________________________ Certified to be the bonafide record of work done by ________________________ of EEE department, B.Tech degree course in the Practical 15EE210L Electrical machines Lab-II in SRM IST, Kattankulathur during the academic year 2017-2018. Lab in-charge Date: Year Co-ordinator Submitted for end semester examination held in Electrical machines Lab, SRM IST, Kattankulathur. Date: Examiner-1 Examiner-2 LIST OF EXPERIMENTS 1. Performance evaluation of single phase induction motor 2. a) Performance evaluation of three phase induction motor b) Load test on three phase squirrel cage induction motor using open lab system 3. Speed control of rotating transformer 4. Synchronisation of alternator to infinite bus bar 5. Predetermination of voltage regulation 6. Determination of v and inverted v curves of synchronous motor 7. Determination of xd and xq for salient pole alternator using slip test 8. Characteristics of 3 phase induction generator 9. Single phasing in 3 phase induction motor 10. Armature reaction in synchronous generator INDEX Expe Date Viva Executi Calculation Pre and Total Faculty rime of Title of Experiment (10) on / Post Lab (50) Signatu nt No Experi (10) Evaluation (10) re ment (20) Performance evaluation of 1 single phase induction motor a) Performance evaluation 2 (a) of three phase induction motor b) Load test on three phase 2(b) squirrel cage induction motor using open lab system Speed control of rotating 3 transformer Synchronisation of 4 alternator to infinite bus bar Predetermination of voltage 5 regulation Determination of v and 6 inverted v curves of synchronous motor Determination of xd and xq 7 for salient pole alternator using slip test Characteristics of 3 phase 8 induction generator Single phasing in 3 phase 9 induction motor Armature reaction in 10 synchronous generator Average PERFORMANCE EVALUATION OF SINGLE PHASE INDUCTION MOTOR PRE LAB QUESTIONS 1. What are the types of single phase induction motor? 2. Why single phase induction motors are not self-starting? 3. How the direction of a capacitor start Induction motor is be reversed? 4. In what respect does a 1-phase Induction motor differ from a 3-phase Induction motor? 5. What is the rating of single phase machines? State its applications Experiment No. PERFORMANCE EVALUATION OF SINGLE PHASE INDUCTION MOTOR AIM To conduct open circuit, short circuit and load test on the given single phase induction motor and to plot its performance characteristics. APPARATUS REQUIRED: S.NO APPARATUS SPECIFICATIONS QUANTITY 1 VOLTMETER (0-300V) MI 1 (0-150V) MI 1 2 AMMETER (0-10A) MI 1 (0-5A) MI 1 3 WATTMETER (300V,10A,UPF) 1 (150V,10A, UPF) 1 (300V,5A,LPF) 1 4 TACHOMETER (0-10000 RPM) 1 5 Connecting wires As required FORMULAE Load test 1. Circumference of the brake drum = 2πR (m) R = Radius of the brake drum 2. Input power =W (watts) W = wattmeter readings 3. Torque (T) = 9.81x R x (S1 ~ S2) (N-m) S1, S2 = spring balance readings (Kg) 2NT 4. Output power = (watts) 60 N- Speed in rpm output power 5. % Efficiency (η) = x100 input power W 6. Power factor, cos Φ= VI Ns N 7. % Slip, s = 100 Ns 120 f NS = synchronous speed = (rpm) P P = no. of poles f=frequency of supply (Hz) No load test R1= 1.5x Rdc cos Ф = Wo / Vo Io VAB = Io xo xo = VAB /Io Blocked rotor test cos Φsc =Wsc /Vsc Isc Zeq = Vsc/ Isc 2 Req = Wsc /( Isc) Req = R1 + R2 R2 = Req - R1 = rotor resistance referred to stator 2 2 Xeq =√(Zeq - Req ) X1 = X2 X2 Where W0 = no-load input power in watts (watts) Wsc = short circuit input power in watts (watts) V0 = line voltage on no-load I0 = line current on no-load CALCULATIONS TO DRAW THE EQUIVALENT CIRCUIT Blocked rotor test Zeq = Vsc/ Isc 2 Req = Wsc /( Isc) 2 2 Xeq =√(Zeq - Req ) R1= 1.5*Rdc Req = R1 + R2 R2 = Req - R1 Xeq=X1 + X2 X1 = X2 x2 = X2 / 2 r2= R2 / 2 Where VSC= Short circuit voltage volts ISC= Short circuit current in amps WSC= Short circuit power in watts No load test VAB = Io xo | | xo = Where W0 = no-load input power in watts (watts) V0 = line voltage on no-load I0 = line current on no-load PRECAUTIONS Load test 1. The auto transformer must kept at minimum voltage position. 2. The motor is started at no load condition. 3. The motor should not be stopped under loaded condition No load test 1. Initially DPST Switch is kept open. 2. Auto transformer is kept at minimum potential position. 3. The machines must be started on no load. Blocked rotor test 1. Initially the DPST Switch is kept open. 2. Auto transformer is kept at minimum potential position. 3. The machine must be started at full load (blocked rotor). MODEL EQUIVALENT CIRCUIT MODEL GRAPH TABULAR COLUMN No load test V0 I0 W0 (volts) (amps) (watts) MF OBS ACT Load test Voltage Current Speed Wattmeter Spring balance Torque Output Power % efficiency %Slip(s) V I N reading readings (Kg) (T) Power factor (η) (volts ) Amps (rpm) (watts) S1 S2 S1~S2 (watts) (cos Φ) N-m OBS ACT Blocked rotor test VSC ISC WSC (volts) (amps) (watts) MF OBS ACT CIRCUIT DIAGRAM 300V, 10A, UPF (0-10)A MI Fuse M L P A 15A C V D S1 S2 P M1 C Kg Kg S T 230V, (0-300)V 50Hz 1 S V 270) V 270) - MI AC W Supply I T 230/(0 Auto Transformer Auto C M2 H Rotor Brake Drum N Link S1 S2 S , S - AUXILLARY WINDING FUSE RATING: NAME PLATE DETAILS: 1 2 M , M - MAIN WINDING 1 2 125% of rated current Rated Voltage : 220V Rated Current : 9.5A 125 x 9.5 Rated Power : 3HP ---------------- = 15 A Rated Speed : 1470 RPM 100 PROCEDURE Load test 1. Connections are given as per the circuit diagram 2. The DPST switch is closed and the single phase supply is given to the motor. 3. By adjusting the autotransformer, the rated voltage is applied and the corresponding no load values of speed, spring balance and meter readings are noted down. If the wattmeter readings show negative deflection on no load, switch of the supply & interchange the terminals of current coils (M & L) of the wattmeter. Now, again start the motor (follow above procedure for starting), take readings. 4. The procedure is repeated till rated current of the motor is reached. 5. The motor is unloaded, the auto transformer is brought to the minimum voltage position, and the DPST switch is opened. 6. The radius of the brake drum is measured. No load test 1. Connections are given as per the circuit diagram. 2. The motor is kept at no load condition. 3. The DPST switch is closed 4. By adjusting the 1Φ auto transformer the machine is brought to rated voltage. 5. The ammeter, voltmeter and wattmeter readings are noted down. Blocked rotor test 1. Connections are given as per the circuit diagram. 2. The rotor is made standstill (held tight) by applying Load to the motor. 3. Close the DPST switch. 4. By adjusting the 1Φ auto transformer rated current is allowed to circulate. 5. The ammeter, voltmeter and wattmeter readings are noted down. RESULT POST LAB QUESTIONS 1. What are the inherent characteristics of plain 1-Ø Induction motor? 2. Why single phase induction motor has low power factor? 3. State double field revolving theory. 4. How the direction of a capacitor start Induction motor is reversed? 5. Why is the starting torque of a capacitor start induction motor high, when compared to that of a split phase induction motor? PERFORMANCE EVALUATION OF THREE PHASE INDUCTION MOTOR PRELAB QUESTIONS 1. What is slip of an induction motor? 2. An induction motor is generally analogous to__________________ 3. What are the operating modes of 3-φ induction motor? 4. State the advantages of skewing? 5. How can the direction of rotation of the 3-φ induction motor be reversed? Ns N PERFORMANCE EVALUATION100 OF THREE PHASE INDUCTION Ns MOTOR 120 f AIM P To conduct open circuit, short circuit and load test on the given three phase induction motor squirrel cage induction motor and to plot its performance characteristics. APPARATUS REQUIRED SI.NO APPARATUS SPECIFICATIONS QUANTITY 1 VOLTMETER (0-600V) MI 1 (0-300V)MI 1 2 AMMETER (0-10A) MI 1 (0-5A) MI 1 3 WATTMETER (600V,10A,UPF) 2 (600V,5A,LPF) 2 4 TACHOMETER (0-10000 RPM) 1 FORMULAE Load test 1. circumference of the brake drum = 2πR (m) R = Radius of the brake drum 2. Input power W=W1+W2 (watts) W1, W2 = wattmeter readings 3. Torque (T) = 9.81* R * (S1 ~ S2) (N-m) S1, S2 = spring balance readings (Kg) 4. Output power = (watts) output power 5. % Efficiency (η) = x100 input power W W 6. Power factor, Cos Φ = 1 2 3 VI 2NT Cos Φ= Power factor 60 7. %Slip, s = NS = synchronous speed = (rpm) P = no. of poles f=frequency of supply (Hz) No load test W0 Cos Φ0 = 3 V0 I 0 Where W0 = no-load input power in watts (watts) V0 = line voltage on no-load I0 = line current on no-load Iw= Io Cos Φ0 Amps V0( ph) V0 Ro= = Ω I w 3 I w Iµ= Io Sin Φ0 Amps V 0( ph) V0 Xo= = Ω I 3 I Blocked rotor test V ISN = I SC VSC 2 I SN WSN= Wsc (watts) I SC WSC Cos Φsc = 3 Vsc Isc 2 2 X01= Z01 R01 () ’ R2 = R01/ 2 Ω ’ ’ 1 s RL = R2 Ω s Where Wsc = short circuit input power in watts (watts) Iw= Working current in amps Iµ= Magnetizing current in amps X0= No load reactance in Ω VSC= Short circuit voltage volts ISC= Short circuit current in amps WSC= Short circuit power in watts ISC=Line Current under blocked rotor condition for short circuit voltage ISN=Line Current under blocked rotor condition for rated voltage s= 5% (Assume PRECAUTIONS Load test 1.
Load more

Recommended publications
  • Income? Bisone
    INCOME? BISONE ED 179 392 SP 029 296 $ AUTHOR Hamilton, Howard B. TITLE Problem Manual for Power Processiug, Tart 1. Electric Machinery Analysis. ) ,INSTITUTION Pittsbutgh Univ., VA. 51'014 AGENCY National Science Foundation, Weeshingtcni D.C. PUB DATE -70 GRANT NSF-GY-4138 NOTE 40p.; For_related documents', see SE 029 295-298 EDRS PRICE MF01/BCO2 Plus Postage. DESCRIPTORS *College Science: Curriculum Develoimeft: Electricity: Electromechanical lacshnology;- Electfonics: *Engineering Educatiob: Higher Education: Instructional Materials: *Problem Solving; Science CourAes:,'Science Curriculum: Science . Eductttion; *Science Materials: Scientific Concepts AOSTRACT This publication was developed as aPortion/ofa . two-semester se4uence commencing t either the-sixth cr seVenth.term of the undergraduate program in electrical engineering at the University of Pittsburgh. The materials of tfie two courses, produced by' National Science Foundation grant, are concernedwitli power con ion systems comprising power electronic devices, electromechanical energy converters, and,associnted logic configurations necessary to cause the systlp to behave in a, prescrib,ed fashion. The erphasis in this portion of the'two course E` sequende (Part 1)is on electric machinery analysis.. 7his publication is-the problem manual for Part 1, which provide's problems included in 4, the first course. (HM) 4 Reproductions supplied by EDPS are the best that can be made from the original document. * **************************v******************************************** 2
    [Show full text]
  • Diploma in Electrical and Electronics Engineering PAGE 1
    ` DIPLOMA IN ELECTRICAL AND ELECTRONICS ENGINEERING COURSES OFFERED CODE COURSE CREDITS YEAR/SEMESTER 15O A) FOUNDATION COURSES : (49 CREDITS) (COMMON FOR ALL PROGRAMMES) 0101 Communicative English – I 5 I/ODD 0102 Engineering Mathematics-I 8 I/ODD 0103 Engineering Physics – I 5 I/ODD 0104 Engineering Chemistry – I 5 I/ODD 0105 Engineering Physics- I Practical 1 I/ODD 0106 Engineering Chemistry – I Practical 1 I/ODD 0107 Communicative English – II 4 I/EVEN 0108 Engineering Mathematics-II 5 I/EVEN 0109 Applied Mathematics 5 I/EVEN 0110 Engineering Physics – II 4 I/EVEN 0111 Engineering Chemistry – II 4 I/EVEN 0112 Engineering Physics – II Practical 1 I/EVEN 0113 Engineering Chemistry – II Practical 1 I/EVEN B) CORE TECHNOLOGY COURSES : ( 43 CREDITS) 0201A Workshop Practical 1 I/ODD 0202 Engineering Graphics-I 3 I/ODD 0203 Engineering Graphics-II 3 I/EVEN 0204 Computer Applications Practical – I 1 I/ODD 0205 Computer Applications Practical – II 1 I/EVEN 3201 Electrical Circuit Theory 6 II/ODD 3202 Electrical Machines - I 5 II/ODD 3203 Electronic Devices and Circuits 5 II/ODD 3204 Electrical Circuits and Machines Practical 3 II/ODD 3205 Electronic Devices and Circuits Practical 3 II/ODD 3206 Electrical Workshop Practical 2 II/ODD 3207 Life and Employability Skills Practical 2 II/ODD 3208 Digital Electronics 5 II/EVEN 3209 Integrated CircuitsPractical 3 II/EVEN Diploma in Electrical and Electronics Engineering PAGE 1 ` C) APPLIED TECHNOLOGY COURSES: (58 CREDITS) 3301 Electrical Machines – II 5 II/EVEN 3302 Measurements and Instruments 4 II/EVEN
    [Show full text]
  • Three-Phase Induction Motor
    Three-Phase Induction Motor EXPERIMENT Induction motor Three-Phase Induction Motors 208VLL OBJECTIVE This experiment demonstrates the performance of squirrel-cage induction motors and the method for deriving electrical equivalent circuits from test data. REFERENCES 1. “Electric Machinery”, Fitzgerald, Kingsley, and Umans, McGraw-Hill Book Company, 1983, Chapter 9. 2. “Electric Machinery and Transformers”, Kosow, Irving L., Prentice-Hall, Inc., 1972. 3. “Electromechanical Energy Conversion”, Brown, David, and Hamilton, E. P., MacMillan Publishing Company, 1984. 4. “Electromechanics and Electric Machines”, Nasar, S. A., and Unnewehr, L. E., John Wiley and Sons, 1979. BACKGROUND INFORMATION The three-phase squirrel-cage induction motor can, and many times does, have the same armature (stator) winding as the three-phase synchronous motor. As in the synchronous motor, applying three-phase currents to the armature creates a synchronously-rotating magnetic field. The induction motor rotor is a completely short-circuited conductive cage. Figures 1 and 2 illustrate the rotor construction. Revised: April 11, 2013 1 of 10 Three-Phase Induction Motor Figure 1: Induction machine construction. Figure 2: Squirrel-case rotor. Revised: April 11, 2013 2 of 10 Three-Phase Induction Motor The rotor receives its excitation by induction from the armature field. Hence, the induction machine is a doubly-excited machine in the same sense as the synchronous and DC machines. The basic principle of operation is described by Faraday’s Law. If we assume that the machine rotor is at a standstill and the armature is excited, then the armature-produced rotating field is moving with respect to the rotor. In fact, the relative speed between the rotating field and the rotor is synchronous speed.
    [Show full text]
  • The Analysis, Simulation, and Implementation of Control Strategies
    Purdue University Purdue e-Pubs ECE Technical Reports Electrical and Computer Engineering 4-1-1996 THE ANALYSIS, SIMULATION, AND IMPLEMENTATION OF CONTROL STRATEGIES FOR A PULSEWIDTH MODULATED INDUCTION MOTOR DRIVE Scott .D Roller Purdue University School of Electrical and Computer Engineering Chee Mun Ong Purdue University School of Electrical and Computer Engineering Follow this and additional works at: http://docs.lib.purdue.edu/ecetr Part of the Electrical and Computer Engineering Commons Roller, Scott .D and Ong, Chee Mun, "THE ANALYSIS, SIMULATION, AND IMPLEMENTATION OF CONTROL STRATEGIES FOR A PULSEWIDTH MODULATED INDUCTION MOTOR DRIVE" (1996). ECE Technical Reports. Paper 101. http://docs.lib.purdue.edu/ecetr/101 This document has been made available through Purdue e-Pubs, a service of the Purdue University Libraries. Please contact [email protected] for additional information. THEA NALYSIS, SIMULATION, AND IMPLEMENTATION OF CONTROL STRATEGIES FOR A PULSEWIDTH MOD~~LATEDINDUCTION MOTOR DRIVE TR-ECE 96-7 APRIL1996 THE ANALYSIS. SIMULATION AND IMPLEMENTATION OF CONTROL STRATEGIES FOR A PULSEWIDTH MODCTLATED INDUCTION MOTOR DRIVE by Scott D. Roller Professor Chee-Mun Ong Purdue Electric Power Center School of Electrical Engineering Purdue University 1285 Electrical Engineering Building West Lafayette, IN 47907- 1285 May 1996 TABLE OF CONTENTS Page LIST OF TABLES ........................................................................................................... v .. LIST OF FIGURES ..........................................................................................
    [Show full text]
  • SCHEME of EXAMINATION for B.TECH DEGREE Ist Semester Examination (Common to All Branches)
    ANNEXURE - SCHEME 1 SCHEME OF EXAMINATION FOR B.TECH DEGREE Ist Semester Examination (Common to all Branches) Course Subject Teaching Schedule Examination Schedule Total Duration No L T P/D Total Theory Sessional Practical/ of Exam. Viva HUT-102 English Language Or MET-102 Manufacturing Process HUT-104 Engineering Economics Or ECT-103 Basic Electronics Engineering MAT-103 Mathematics-I PHT-104 Physics-I CHT-104 Chemistry-I ELT-105 Basic Electrical Engineering 2 2/2 3 50 50 100 3 OR COT-102 Computer Engineering CET-102 Engineering Graphics-I PHT-105 Physics-I Practical CHT-103 Chemistry-I Practical ECT-105 Basic Electronics Engineering- Practical ELT-107 Basic Electrical Engineering Practical - - 3 3 60 40 100 3 OR COT-105 Computer Lab.* MET-103 Workshop Practical-I *All Engineering Departments will share in teaching & Exams. HUT-102 and HUT-104 will be offered to first half of the students strength, and MET –102 and ECT-103 will be offered to second half of the students strength. Similar Procedure for (ELT-102,ELT-104) and (COT-103,COT-105) will be adopted 2 SCHEME OF EXAMINATION FOR B.TECH DEGREE 2nd Semester Examination (Common to all Branches) Course Subject Teaching Schedule Examination Schedule Total Duration No L T P/D Total Theory Sessional Practical/ of Exam. Viva MET-102Manufacturing Process Or HUT-102 English Language ECT-103 Basic Electronics Engineering Or HUT-104 Engineering Economics MAT-104 Mathematics-II PHT-106 Physics-II CHT-106 Chemistry-II *COT-102 Computer Engineering OR ELT-102 Basic Electrical Engineering 2 2/2 - 3 50 50 100 3 MET-105 Engineering Graphics-II PHT-105 Physics-II Practical CHT-103 Chemistry-II Practical ECT-105 Basic Electronics Engineering- Practical MET-103 Workshop Practical-II COT-105 Computer Lab.* OR ELT-103 Basic Electrical Engineering - - 2/2 1 60 40 100 3 Practical *All Engineering Departments will share in teaching & Exams.
    [Show full text]
  • Electrical Machines Lab Ii
    Electrical & Electronics Engineering Department BRCM COLLEGE OF ENGINEERING & TECHNOLOGY BAHAL – 127028 ( Distt. Bhiwani ) Haryana, India ELECTRICAL MACHINES LAB II EE-327-F ELECTRICAL MACHINES-II LAB L T P CLASS WORK : 25 Marks 0 0 2 EXAM : 25 Marks TOTAL : 50 Marks DURATION OF EXAM : 3 HRS List of Experiments: 1. Study of the No Load and Block Rotor Test in a Three Phase Slip Ring Induction Motor & draw its circle diagram 2. To Study the Starting of Slip Ring Induction Motor by Rotor Resistance Starter. 3. To Study and Measure Direct and Quadrature Axis Reactance of a 3 phase alternator by Slip Test 4. To Study and Measure Positive, Negative and Zero Sequence Impedance of a Alternator 5. To Study and Measure Synchronous Impedance and Short circuit ratio of Synchronous Generator. 6. Study of Power (Load) sharing between two Three Phase alternators in parallel operation condition 7. Synchronization of two Three Phase Alternators, by a) Synchroscope Method b) Three dark lamp Method c) Two bright one dark lamp Method 8. To plot V- Curve of synchronous motor. 7. To study and verify Load characteristics of Long Shunt & short shunt Commutatively Compound Generator using 3 phase induction motor as prime mover. 10. To perform O.C. test on synchronous generator. And determine the full load regulation of a three phase synchronous generator by synchronous impedance method NOTE: At least 10 experiments are to be performed, with at least 7 from above list, remaining three may either be performed from above list or designed & set by concerned institution as per scope of syllabus.
    [Show full text]
  • Modeling, Analogue and Tests of an Electric Machine
    MODELING, ANALOGUE AND TESTS OF AN ELECTRIC MACHINE VOLTAGE CONTROL SYSTEM 'by GRAHAM E.' DAWSON ( j B.A.Sc, University of British. Columbia, 1963. A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS, FOR THE DEGREE OF MASTER OF APPLIED SCIENCE. in the Department of Electrical Engineering We accept this thesis as conforming to the required standard Members of the Committee Head of the Department .»»«... Members of the Department of Electrical Engineering THE UNIVERSITY OF BRITISH COLUMBIA September, 1966 In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely.avai1able for reference and study. I further agree that permission for ex• tensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his representatives.. It is understood that copying or publication of this thesis for finan• cial gain shall not be allowed without my.written permission. Department of Electrical Engineering The University of British Columbia Vancou ve r.,8, Canada Date 7. MM ABSTRACT This thesis is concerned with the modeling, analogue and tests of an interconnected four electric machine voltage control system. Many analogue studies of electric machines have been done but most are concerned with the development of analogue techniques and only a few give substantiation of the validity of the analogue models through comparison of results from analogue studies and from real machine tests. Chapter 2 describes the procedure and the system under study. Chapter 3 describes the methods used for the determination of the electrical and mechanical system parameters.
    [Show full text]
  • FOR PREDICTING INIJJ'c'l'ion MOTOR CHARACTERISTICS I
    AN IMPROVED METHOD FOR PREDICTING INIJJ'C'l'ION MOTOR CHARACTERISTICS i AN D ROVED FOR REDICTlNG llTDUC'l'ION MOTO CHA.RAOTERIBT'IOS I' Bachelor of Science :Montana State College BOZtX!lM , , onto.na 1944 j;;)u.bmitt to tho De artnont of leotricnl EngiMeri g Cklaho J..gricultur and rcohenieul College In purtiul Ful.:f'illmen'l; of t e Re0ui ents tor the gree of' STER OF ..:>C ~en 1947 ii OKY.l~fl:\H .1:J:?RO D BY: !GIUCrL TFP..U i M' nwrn· 11, c·m 1, L J B R ,\ • v . DE'C 8 1947 llea! of £fie bepartiii.ent ') r ·> P , .... I ) ~ ~1 J . iii PREFiVJE The induction motor is one o.. f' the most u.se:tul · electrie maohines in industry today. Since its inverrtion in 1888 by !'Jikola Telsa, it has eonstantl;r bee:n replacing other types of machines, both eleotrio .ru1.d meehanieal, as a raeans of supply­ ing 111sehanioal po;:er. Ma.de in its diversified for.ID1J,. an induction riaotor et:.m be made t;.o fit a.lm.ost any torq_ue-speed requirement. In its most common form., the normal-starting-current. normal-starting-torque, squirrel-cage induction motor., it offers such a.dvantae;es as high effioiency:t practioally constant speed, extremely sirn.plo ope:rationt a11d s:m.s.11 electrical na.intenance requirements. Because e:f the induction moto~•s wide use, it is advantageous to both the roanu:faoturer and the consumer to be able to ascertain, as aoeurately and si:Ll1ply as possible, hmv a given motor vrill operate under varying eondi tions of load.
    [Show full text]
  • Versatile Three-Phase Power Electronics Converter Based Real- Time Load Emulators
    University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 8-2015 Versatile Three-Phase Power Electronics Converter based Real- time Load Emulators Jing Wang University of Tennessee - Knoxville, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Part of the Electrical and Electronics Commons, Numerical Analysis and Scientific Computing Commons, and the Power and Energy Commons Recommended Citation Wang, Jing, "Versatile Three-Phase Power Electronics Converter based Real-time Load Emulators. " PhD diss., University of Tennessee, 2015. https://trace.tennessee.edu/utk_graddiss/3478 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Jing Wang entitled "Versatile Three-Phase Power Electronics Converter based Real-time Load Emulators." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Electrical Engineering. Leon M. Tolbert, Major Professor We have read this dissertation and recommend its acceptance: Fred Wang, Kevin Tomsovic, Yulong Xing Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Versatile Three-Phase Power Electronics Converter based Real-time Load Emulators A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Jing Wang August 2015 Copyright © 2015 by Jing Wang.
    [Show full text]
  • 182 Chapter 7 Analysis and Simulation of Ipm Generator
    182 CHAPTER 7 ANALYSIS AND SIMULATION OF IPM GENERATOR DRIVING AN INDUCTION MACHINE 7.1 Introduction In this chapter, the analysis and simulation results of the IPM generator driving a three phases, one horsepower induction machine will be presented. A schematic of the topology can be seen in Figure 7.1. Shunt capacitors placed at the terminals of the IPM are used to boost the terminal voltage and to supply reactive power. For the two machines used in the experiment, the use of the capacitors was not optional because it was found that the induction machine would not even start without the presence of the capacitors. In the first part of the chapter, the dynamic and steady state equations used to model the induction machine will be presented. Next, the value of the parameters of the induction machine (and the methods used to determine the parameters) will be given. The comparison between the steady state experiment and calculated results will then be compared. Finally, simulated waveforms will be presented which show how the system behaves for three different types of load. 183 7.2 Derivation of Dynamic and Steady State Equations of a Squirrel Cage Induction Machine The d q stator (after the stator resistance and core loss (see Figure 7.2)) and rotor voltage equations of the induction machine for the voltage can be written as V qss = ω λ ds + p λ qs V dss = - ω λ qs + p λ ds (7.1) V qr = rr I qr + (ω - ωr )λ dr + p λ qr V dr = rr I dr - (ω - ωr )λ qr + p λ dr , where λ qs = Llsm I qsm + Lmm ( I qsm + I qr ) λ ds = Llsm I dsm + Lmm ( I dsm + I dr ) (7.2) λ qr = Llr I qr + Lmm ( I qsm + I qr ) λ dr = Llr I dr + Lmm ( I dsm + I dr ) .
    [Show full text]
  • Course Description Bachelor of Technology (Electrical Engineering)
    COURSE DESCRIPTION BACHELOR OF TECHNOLOGY (ELECTRICAL ENGINEERING) COLLEGE OF TECHNOLOGY AND ENGINEERING MAHARANA PRATAP UNIVERSITY OF AGRICULTURE AND TECHNOLOGY UDAIPUR (RAJASTHAN) SECOND YEAR (SEMESTER-I) BS 211 (All Branches) MATHEMATICS – III Cr. Hrs. 3 (3 + 0) L T P Credit 3 0 0 Hours 3 0 0 COURSE OUTCOME - CO1: Understand the need of numerical method for solving mathematical equations of various engineering problems., CO2: Provide interpolation techniques which are useful in analyzing the data that is in the form of unknown functionCO3: Discuss numerical integration and differentiation and solving problems which cannot be solved by conventional methods.CO4: Discuss the need of Laplace transform to convert systems from time to frequency domains and to understand application and working of Laplace transformations. UNIT-I Interpolation: Finite differences, various difference operators and theirrelationships, factorial notation. Interpolation with equal intervals;Newton’s forward and backward interpolation formulae, Lagrange’sinterpolation formula for unequal intervals. UNIT-II Gauss forward and backward interpolation formulae, Stirling’s andBessel’s central difference interpolation formulae. Numerical Differentiation: Numerical differentiation based on Newton’sforward and backward, Gauss forward and backward interpolation formulae. UNIT-III Numerical Integration: Numerical integration by Trapezoidal, Simpson’s rule. Numerical Solutions of Ordinary Differential Equations: Picard’s method,Taylor’s series method, Euler’s method, modified
    [Show full text]
  • Routine Test of Three Phase Induction Motor
    International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 04 | April -2017 www.irjet.net p-ISSN: 2395-0072 Routine Test of Three Phase Induction Motor Vishant Naik1, Saurabh K Singh2, Sahil Chawhan3, Jatin Wankhede4, Anand Nair5 , Ankit Balpande6 1,2Asst. Prof. , Dept. of Electrical Engineering, S.B.J.I.T.M.R.Nagpur, Maharashtra, India 3,4,5,6Student , Dept. of Electrical Engineering, S.B.J.I.T.M.R.Nagpur, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract- Amongst many types of electrical motors, The testing of rotating electrical machine for induction motors still enjoy the same popularity as they did constructional and electrical requirement can be verified a century ago. Several factors which include robustness, low without disassembling the machine. cost and low maintenance have made them popular for industrial applications when compared to dc and other ac Following tests are carried out on three phase induction motors. Another aspect in induction motor drives which has motor to check the essential requirements which are been researched recently is the use of multiphase induction likely to vary during production: motors where the number of stator phases is more than three. Induction motor is one of the most important motor 1) Measurement of winding resistance used in industrial applications. Induction machines are considered relatively reliable and robust due to their simple 2) Insulation resistance test design and well-developed manufacturing technology. This paper aims to represent routine test performing in three 3) Vibration test phase induction motor. The computer based no load and blocked rotor test method are costlier and the electrical 4) No load test parameters cannot be visualized by Programmable Logic Controller (PLC) based method.
    [Show full text]