DOCSLIB.ORG

Simulation of Induction Motor Characteristics Using a Circle Diagram

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Simulation of Induction Motor Characteristics Using a Circle Diagram PROCEEDINGS OF THE 51st ANNUAL INTERNATIONAL SCIENTIFIC CONFERENCE OF RIGA TECHNICAL UNIVERSITY SECTION „POWER AND ELECTRICAL ENGINEERING”, OCTOBER 2010 Electrical Machines and Apparatus / Elektrisk s Maš nas un Apar ti Simulation of Induction Motor Characteristics Using A Circle Diagram Alina Meishele (PhD student, Riga Technical University), Elena Ketnere (Dr.Sc.ing., Riga Technical University), Aleksandrs Mesnyayevs (PhD student, Riga Technical University). Abstract – The circle diagram helps to identify all simplified induction motor circle diagram, as shown below electromagnetic values, which describe the machine’s operation (Figure 2). mode at different slip values and gives them a better description when machine’s operating mode is changing. The circle diagram is also of great importance for studying the case, when the parameters of the asynchronous machines operating mode are assumed to be constant values. Keywords – Circle diagram, heavy-duty induction motor, mathematical simulation. I. INTRODUCTION In general, mathematical modeling opens new perspectives Fig. 2. A simplified construction of the induction motor circle diagram. for studying the electric machines. The possibility to replace real objects with the mathematical model provides great (1) advantages for the development and research of electric I I ( I ) machines. As it is known, one of the most popular forms of 1 00 2 the electric drive is the induction motor. It is related with the where simplicity of manufacturing and the highest safety of induction motor. Modern technologies drive the engineering industry for the U1 I 00 (2) increase of the produced electric machines power. During the Z1 Z m tests of a new machine, it is not always possible to load the machine according to its power. In such cases, if the I - is the ideal idle current, and does not depend on the slip appropriate technical supply is not available in order to receive 00 the necessary curves for electric motors with the power over ( s 0 ). This current is constant, since U1 const and 100 kW, it is possible to measure the efficiency, power factor f1 const . Therefore, the coordinates of the beginning are to and slip values, by using a circle diagram. be transferred to the I00 value, and, as the result, the circle For the convenient view of the circle diagram, it is diagram is acquired (Figure 3). [1]-[3] appropriate to use the equivalent circuit of the asynchronous machine (Figure 1.). 2 CZ1 C Z 2s I1 I2 Z1 U1 Fig. 3. The circle diagram of the induction motor. Z m I00 Fig. 1. The equivalent circuit of the asynchronous machine. II.THE PROGRAM TEST Based on the acquired diagram, the program “Diagram” was According to the equivalent circuit (Figure 1), the stator created using the programming language FORTRAN. current can be determined by adding the constant idle current I00 to the variable component - I2 . So, it is obtained a 141 PROCEEDINGS OF THE 51st ANNUAL INTERNATIONAL SCIENTIFIC CONFERENCE OF RIGA TECHNICAL UNIVERSITY SECTION „POWER AND ELECTRICAL ENGINEERING”, OCTOBER 2010 Electrical Machines and Apparatus / Elektrisk s Maš nas un Apar ti The results of student’s practical work based on experiments For the comparative reasons, the calculation also was made were taken to prove the precision of this program. Nominal using the program “Diagram”. On the basis of the idle and parameters are given in the table 1. short circuit test results, this program calculates the TABLE I parameters, which are required for the construction of circle diagrams. The program calculates the operating and start-up THE THREE-PHASE INDUCTION MOTOR WITH A PHASE ROTOR characteristics with the assistance of a circle diagram. Nominal parameters For operating the program, it is essential to enter the Nominal voltage U N 220 V following parameters: the stator winding resistance R1 , the ambient temperature T, the synchronous rotation frequency Nominal current I N 28 A n1 , the nominal (phase) voltage U1N , the nominal current Nominal power PN 7.5 kW I N , the idle current I0 , idle losses P0 , mechanical losses Nominal speed n -1 N 945 (min ) Pmeh , the short circuit voltage U k (the voltage, under which Power factor cos 0.83 the nominal current is achieved) short-circuit losses (losses corresponding nominal current) Pk . Efficiency 0.84 The program will process them and generate a circle Stator winding resistance Rstat 0.183 diagram parameters, such as: the radius of diagram, the circle center in the complex plane, the point of synchronism, the idle Using the measurement results, the circle diagram was point, the short-circuit point, the infinite slip point. The constructed, which allowed to determine the performance program will also generate such nominal parameters as: the curves (see fig.4). power factor, supply power, useful power, efficiency, slip and torque. The program also generates the operating A characteristics and the start-up characteristics, which allow to m determine the starting current, the starting torque, the I k (s 0) maximum torque and the critical slip. After obtaining all these values, the circle diagram can be U f I (s ) I1 Pk / m p drawn. Results were used to construct operating and start-up 0 P2 M k characteristics with help of Microsoft Office Excel as shown P m P M m em on figure 6 and 7. I0 P1 the operating charakteristics Fig. 4. The three-phase induction motor’s circle diagram. 80 60 The figure 4 shows the circle diagrams, which have been 40 created using the Microsoft Office Visio program. The operating characteristics are shown on the figure 5. 20 0 0 2 4 6 8 P2, kW P1 I1 M cosFix50 nix50 sx1000 Fig. 6. The operating characteristics (based on the program data). Fig. 5. The operating characteristics 142 PROCEEDINGS OF THE 51st ANNUAL INTERNATIONAL SCIENTIFIC CONFERENCE OF RIGA TECHNICAL UNIVERSITY SECTION „POWER AND ELECTRICAL ENGINEERING”, OCTOBER 2010 Electrical Machines and Apparatus / Elektrisk s Maš nas un Apar ti The start-up characteristics the operating char. based on measurments 2500 300 2000 250 1500 M 200 1000 I 150 500 100 0 50 0 0,2 0,4 0,6 0,8 1 1,2 0 P2 slip 0 50 100 150 200 250 P1 I1 M cosFIx50 sx100 nix50 Fig. 7. The start-up characteristics (based on program data). Fig. 8. The operating characteristics based on measurements. Comparing the results, which were obtained manually, and the ones, using the program ”Diagram”, it is concluded that they partially coincide. The manually executed calculations the operating char. based on program data are not precise enough due to the human factor. Using the 300 computer program, it is possible to obtain the necessary 250 parameters and characteristics with no additional time losses, which occur while constructing the manual diagram. 200 The further program test was executed using the three-phase 150 traction motor “DTA 170 U2”. This motor is a part of the 100 asynchronous track drive for the underground car 81-760/61 50 P2 developed by the «Metrovagonmash». The motor parameters 0 are given in table 2. 0 50 100 150 200 TABLE II P1 I1 M cosFIx50 sx100 nix50 THE TRACTION MOTOR PARAMETERS Fig. 9. The Operating characteristics, based on the program “Diagram”. Stator winding resistance R1 0.0397 The ambient temperature T 20°C currents comparison Synchronous rotation frequency n1 1500 min-1 300 Nominal power PN 170 kW 250 200 Nominal (phase) voltage U1N 306.4 V 150 Nominal current I N 225 A 100 The idle current of I0 75.5 A 50 0 Idle losses P0 7.77 kW 0 20 40 60 80 100 120 140 160 180 200 P2 Mechanical losses Pmeh 0.7k W current I1 measur current I1 prog Short circuit voltage Uk 85 V Fig.10. The comparison of current characteristics. Short circuit losses Pk 12 kW The aim of research is to prove that it is possible to obtain torque comparison working performances for asynchronous motor with power 1200 over 100 kW using program “Diagramm”. For comparison the 1000 test results of motor “DTA 170U2” are given. 800 The results obtained by operating the program “Diagram” 600 are compared with the measurement results obtained by the 400 electrical equipment test center (shown on the figures 8, 9). 200 0 0 20 40 60 80 100 120 140 160 180 200 P2 torque M2 measur torque M2 prog Fig. 11. The comparison of torque characteristics. 143 PROCEEDINGS OF THE 51st ANNUAL INTERNATIONAL SCIENTIFIC CONFERENCE OF RIGA TECHNICAL UNIVERSITY SECTION „POWER AND ELECTRICAL ENGINEERING”, OCTOBER 2010 Electrical Machines and Apparatus / Elektrisk s Maš nas un Apar ti Alina R. Meishele is born in 1984 in Latvia. In power factors comparison 2008, she graduated the Riga Technical 0,95 University, obtaining the M.Sc.ing. degree. 0,9 Presently she is a PhD student. 0,85 In March 2007, she received the certificate 0,8 “AutoCAD 2007”. 0,75 0,7 0,65 0,6 0,55 0,5 0 20 40 60 80 100 120 140 160 180 200 P2 power fact. cosFI measur power factor cosFI prog Elena K. Ketnere is born in 1963 in Latvia. In 1985, she graduated the Riga Polytechnical Fig. 12. The comparison of power factor characteristics. Institute (RPI), the Faculty of Electrical and Power Engineering, obtaining the qualification of Engineer in the Electrical Machines and the Apparatus specialty. In 2002, she obtained the efficiencies comparison Dr.Sc.ing. degree. 0,95 After graduating the RPI, E. Ketnere has worked as an engineer at Riga Electric Machine- 0,9 building Plant (1985-1995). In 2005, she was appointed as the Associate Professor in the 0,85 Department of Electrical Machines and Apparatus 0,8 of the Riga Technical University, where she works up to date.
Load more

Recommended publications
  • 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]
  • 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]
  • TRUET Bo THOMPSON \'• Bachelor of Science Louisiana Poiytechnic Institute 1948
    i SOME ASPECTS OF SINGLE PH.A.SE INDUCTION MOTOR THEORY By TRUET Bo THOMPSON \'• Bachelor of Science Louisiana Poiytechnic Institute 1948. Submitted to ·the Faculty of the Graduate School of the Oklahoma Agricultural and Mechanical College in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE 1950 ii SOME ASPECTS OF SINGLE PHASE INDUCTION MOTOR THEORY ' TRUET Bo THOMPSON MASTER OF SCIENCE 1950 THESIS AND ABSTRACT APPROVED: FacultYi~~ De~f!ue Graduate School 266841 iii PREFACE For more than 50 years the two distinct theories of single­ phase motor operation, the cross-field theory and the double­ revolving field theory, have been used to explain the charac­ teristics of these motors. Neither is entirely satisfactory either in its calculation of characteristics or in the physical conception of the motor's operation. The complexity and actual mystery involved have defied through this half century efforts to si~lify and correlate completely the theories now extant. This paper is designed, not to perform this task, nor to develop a new concept, but rather to bring together a· few ideas which have been helpful in the work which was carried on in the belief that there can be a more satisfactory explanation of single­ phase moto~ operation. iv ACKNOWLEDGMENT The writer wishes to express his sincere appreciation to Professor C& Fo Cameron for his encouragement, his reading of this material and his many helpful suggestions concerning it., V TABLE OF CONTENTS CHA PTER I. • • • • • • • . • . 1 The Double Revolving Field. • . • ••••. 1 Two Oppositely Rotating Fields in a Single Stator. • • 13 Two Oppositely Rotating Fields in Two Stators • • • • • 25 Mathematical Development by Equivalent Circuit •• • • • 29 Another Approach to Performance Equations .
    [Show full text]
  • EE6402 – TRANSMISSION and DISTRIBUTION UNIT-I 1. Why High Voltage Is Preferred for Power Transmission? (MJ15, ND15, MJ16) 2. S
    EE6402 – TRANSMISSION AND DISTRIBUTION UNIT-I 1. Why high voltage is preferred for power transmission? (MJ15, ND15, MJ16) As voltage increases, current flow through the line decreases and I2R loss reduces. So transmission efficiency increases. Therefore high voltage is preferred for power transmission. 2. State the disadvantages of HVDC transmission. (ND10) i) High cost of terminal equipment ii) Converters require considerable reactive power. iii) Harmonics are generated which requires filters. iv) Converters do not have overload capacity. 3. Why the transmission lines 3 phase 3 wire circuits while distribution lines are 3ϕ, 4 wire circuits? (ND10, ND13) A Balanced 3 phase circuit does not require the neutral conductor, as the instantaneous sum of the 3 line currents are zero. Therefore the transmission lines and feeders are 3 phase 3 wire circuits. The distributors are 3 phase 4 wire circuits because a neutral wire is necessary to supply the 1 phase loads of domestic and commercial consumers. 4. Define the terms feeders and service mains. (ND11, ND15) Feeders: It is a conductor which connects the substation to the area where power is to be distributed. Generally, no tappings are taken from the feeder. Service mains: A service main is generally a small cable which connects the distributor to the consumer’s terminal. 5. List out the advantages of high voltage A.C transmission. (ND11) i) The power can be generated at high voltages. ii) The maintenance of ac substation is easy and cheaper. 6. What is ring main distributor? (ND12, MJ17) In ring main distributor, the distributor is in the form of a closed ring.
    [Show full text]
  • B. Tech Electrical.Pdf
    JECRC University Course Structure for Electrical Engineering (B.Tech.) JECRC UNIVERSITY Faculty of Engineering & Technology B.Tech in Electrical Engineering Teaching Scheme Semester III Subject Code Subject Contact Hrs Credits L-T-P Electronics Devices & Circuits 3-1-2 5 Circuit Analysis – I 3-1-0 4 Electrical Machines – I 3-1-2 5 Electrical Measurements 3-1-2 5 Mathematics – III 3-1-0 4 Computer Programming – I 3-0-2 4 Total 18-5-8 27 JECRC UNIVERSITY Faculty of Engineering & Technology B.Tech in Electrical Engineering Teaching Scheme Semester IV Subject Code Subject Contact Hrs Credits L-T-P Analogue Electronics 3-1-2 5 Digital Electronics 3-0-2 4 Circuit Analysis – II 3-1-0 4 Electrical Machines – II 3-1-2 5 Advanced Mathematics 3-1-0 4 Generation of Electric Power 3-0-0 3 Total 18-4-6 25 JECRC UNIVERSITY Faculty of Engineering & Technology B.Tech in Electrical Engineering Teaching Scheme Semester V Subject Code Subject Contact Hrs Credits L-T-P Power Electronics-I 3-1-2 5 Microprocessor & Computer 3-0-2 4 Architecture Transmission & Distribution – I 3-1-0 4 Control Systems 3-1-2 5 Utilization of Electrical Power 3-0-0 3 Digital Signal Processing 3-0-0 3 Total 18-3-6 24 JECRC UNIVERSITY Faculty of Engineering & Technology B.Tech in Electrical Engineering Teaching Scheme Semester VI Subject Code Subject Contact Hrs Credits L-T-P Power Electronics –II 3-1-2 5 Power System Analysis 3-1-2 5 EHV AC/DC Transmission 3-0-0 3 Switch Gear & protection 3-0-0 3 Instrumentation 3-0-0 3 Transmission & Distribution – II 3-1-0 4 Economics 0-0-2 1
    [Show full text]
  • Transmission and Distribution
    EE 6402 TRANSMISSION AND DISTRIBUTION A Course Material on TRANSMISSION AND DISTRIBUTION By Mr. S.VIJAY ASSISTANT PROFESSOR DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING SASURIE COLLEGE OF ENGINEERING VIJAYAMANGALAM – 638 056 1 SCE ELECTRICAL AND ELECTRONICS ENGINEERING EE 6402 TRANSMISSION AND DISTRIBUTION QUALITY CERTIFICATE This is to certify that the e-course material Subject Code : EE 6402 Subject : TRANSMISSION AND DISTRIBUTION Class : II Year EEE Being prepared by me and it meets the knowledge requirement of the university curriculum. Signature of the Author Name: Designation: This is to certify that the course material being prepared by Mr. S.VIJAY is of adequate quality. He has referred more than five books among them minimum one is from aboard author. Signature of HD Name: SEAL 2 SCE ELECTRICAL AND ELECTRONICS ENGINEERING EE 6402 TRANSMISSION AND DISTRIBUTION UNIT I STRUCTURE OF POWER SYSTEM 9 Structure of electric power system: generation, transmission and distribution; Types of AC and DC distributors – distributed and concentrated loads – interconnection – EHVAC and HVDC transmission -Introduction to FACTS. UNIT II TRANSMISSION LINE PARAMETERS 9 Parameters of single and three phase transmission lines with single and double circuits - Resistance, inductance and capacitance of solid, stranded and bundled conductors, Symmetrical and unsymmetrical spacing and transposition - application of self and mutual GMD; skin and proximity effects - interference with neighboring communication circuits - Typical configurations, conductor types and electrical parameters of EHV lines, corona discharges. UNIT III MODELLING AND PERFORMANCE OF TRANSMISSION LINES 9 Classification of lines - short line, medium line and long line - equivalent circuits, phasor diagram, attenuation constant, phase constant, surge impedance; transmission efficiency and voltage regulation, real and reactive power flow in lines, Power - circle diagrams, surge impedance loading, methods of voltage control; Ferranti effect.
    [Show full text]
  • Open Circuit & Short Circuit Test on a Single Phase Transformer
    DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING ELECTRICAL MACHINES-II LABARATORY LIST OF EXPERIMENTS Sl.No Name of the Experiment Page no 1 OPEN CIRCUIT & SHORT CIRCUIT TEST ON A SINGLE PHASE 3 TRANSFORMER 2 SUMPNERS TEST 10 3 SCOTT CONNECTION OF TRANSFORMERS 15 4 NO LOAD AND BLOCKED ROTOR TEST ON A 3- ɸ 18 INDUCTION MOTOR 5 REGULATION OF ALTERNATOR USING SYNCHRONOUS 23 IMPEDANCE METHOD 6 ‘V’ AND ‘INVERTED V’ CURVES OF SYNCHRONOUS MOTOR 29 7 EQUIVALENT CIRCUIT OF A SIGLE PHASE INDUCTION 35 MOTOR 8 BRAKE TEST ON 3- ɸ SQUIRREL CAGE INDUCTION MOTOR 40 9 PARALLEL OPERATION OF 1-Φ TRANSFORMERS 46 10 DETERMINATION OF Xd AND Xq OF SALIENT POLE 51 SYNCHRONOUS MOTOR OPEN CIRCUIT & SHORT CIRCUIT TEST ON A SINGLE PHASE TRANSFORMER AIM: To perform open circuit and short circuit test on a single phase transformer and to Pre-determine the efficiency, regulation and equivalent circuit of the transformer. APPARATUS REQUIRED: Sl. equipment Type Range Quantity No. (0-300)V 1 no 1 Voltmeter MI (0-150)V 1 no (0-2)A 1 no 2 Ammeter MI (0-20)A 1 no (0-150)V LPF 3 Wattmeter Dynamo type 1 no (0-2.5)A (0-150)V UPF 4 Wattmeter Dynamo type 1 no (0-10)A 5 Connecting Wires ***** ***** Required Transformer Specifications: Transformer Rating :( in KVA) = 2KVA Winding Details: LV (in Volts): 115V LV side current: 17.8A HV (in Volts): 230V HV side Current: 4.5A Type (Shell/Core): SHELL Auto transformer Specifications: Input Voltage (in Volts): 270V Output Voltage (in Volts): 230V Frequency (in Hz): 50HZ Current rating (in Amp): 10A CIRCUIT DIAGRAM: OPEN CIRCUIT: SHORT CIRCUIT: PROCEDURE: Open circuit test: 1.
    [Show full text]
  • Electrical Machine Ii Lab Lab Manual (Ee – 327 – F) V Semester
    ELECTRICAL MACHINE II LAB LAB MANUAL (EE – 327 – F) V SEMESTER DEPARTMENT OF ELECTRICAL & ELECTRONICS ENGINEERING DRONACHARYA COLLEGE OF ENGINEERING, KHENTAWAS, GURGAON – 123506 CONTENTS Sr.No TITLE Page No. 1. Study of the No Load and Block Rotor Test in a Three Phase Slip Ring Induction Motor & draw its circle diagram 2. To perform O.C. test on synchronous generator. And determine the full load regulation of a three phase synchronous generator by synchronous impedance method 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. Synchronization of two Three Phase Alternators, by a) Synchroscope Method b) Three dark lamp Method c) Two bright one dark lamp Method 6. To plot V- Curve of synchronous motor. 7. To Start Induction motor by Rotor resistance starter 8. Regulation of 3-phase alternator by ZPF and ASA methods 9. Star-delta starting of a three phase induction motor 10. Load test on three phase Induction motor EXPERIMENT NO: 01 AIM:- STUDY OF THE NO LOAD AND BLOCK ROTOR TEST IN A THREE PHASE SLIP RING INDUCTION MOTOR & DRAW ITS CIRCLE DIAGRAM APPARATUS:- 3 phase Induction motor with belt and pulley arrangement , three phase supply, wattmeters , ammeter and voltmeter FORMLULAE Coso=Wo / √3 VoIo Cosr=Wbr / √3 VbrIbr Ibm = Ibr (Vo/Vbr) 2 Wbm = Wbr (Vo/Vbr) 2 Stator copper loss = 3 Ibr Rs PRECAUTION 1. The 3 autotransformer should be kept at initial position. 2. Initially the machine should be under no load condition.
    [Show full text]
  • Electric Machines
    Electrical Engineering Electric Machines Comprehensive Theory with Solved Examples and Practice Questions Publications Publications MADE EASY Publications Corporate Office: 4-A/4,4 Kalu Sarai (Near Hauz Khas Metro Station), New Delhi-110016 E-mail: [email protected] Contact: 011-45124660, 8860378007 Visit us at: www.madeeasypublications.org Electric Machines © Copyright by MADE EASY Publications. All rights are reserved. No part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photo-copying, recording or otherwise), without the prior written permission of the above mentioned publisher of this book. First Edition : 2015 Second Edition : 2016 Third Edition: 2017 Fourth Edition: 2018 Fifth Edition: 2019 Sixth Edition: 2020 © All rights reserved by MADE EASY PUBLICATIONS. No part of this book may be reproduced or utilized in any form without the written permission from the publisher. Contents Electric Machines Chapter 1 2�17 Voltage Regulation �������������������������������������������������������������������32 Magnetic Circuits ����������������������������������������������� 1 2�18 Losses and Efficiency ���������������������������������������������������������������36 1�1 Magnetic Circuits������������������������������������������������������������������������� 1 2�19 Transformer Efficiency �������������������������������������������������������������37 1�2 Leakage Flux ���������������������������������������������������������������������������������
    [Show full text]
  • Electrical and Electronics Engineering Curriculum Is Designed to Prepare the Graduates Having Attitude and Knowledge To
    Program Educational Objectives Bachelor of Electrical and Electronics Engineering curriculum is designed to prepare the graduates having attitude and knowledge to 1. Have successful professional and technical career 2. have strong foundation in basic sciences, mathematics and computational platforms 3. have knowledge on the theory and practices in the field of electrical power engineering and allied areas 4. engross in life-long learning to keep themselves abreast of new developments 5. practice and inspire high ethical values and technical standards Program Outcome a) Ability to apply knowledge of mathematics, sciences and engineering b) Ability to understand and apply basic theorems and postulates in circuit, field and control theories c) Ability to identify, formulate, and solve electrical power engineering problems d) Ability to analyse and apply electronics in the field of electrical power apparatus and systems e) Ability to understand and apply computational platforms and software tools for engineering applications f) Ability to understand ethical and professional responsibilities g) Ability to communicate effectively and work in interdisciplinary groups h) Ability to review, comprehend and report technological developments PEO \ a b c d e f g h PO 1 2 3 4 5 1 ANNA UNIVERSITY :: CHENNAI 600 025 UNIVERSITY DEPARTMENTS B.E. (PART TIME) ELECTRICAL AND ELECTRONICS ENGINEERING I to VII SEMESTERS CURRICULUM & SYLLABUS – R 2013 SEMESTER I SL. COURSE COURSE TITLE L T P C NO CODE THEORY 1. PTMA8151 Applied Mathematics 3 0 0 3 2. PTPH8152 Physics for Electrical and Electronics 3 0 0 3 Engineering 3. PTCY8151 Chemistry for Electrical and Electronics 3 0 0 3 Engineering 4.
    [Show full text]