El/ 010 130 08 a CURRICULUM DEVELOPMENT STUDY of the EFFECTIVENESS of UPGRADING the TECHNICAL SKILLS of EDUCATIONALLY DISADVANTAGED UNION MEMBERS
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Ee 6361- Electrical Drives & Control Ii/Iii Mechanical
EE 6361- ELECTRICAL DRIVES & CONTROL II/III MECHANICAL EE A Course Material on EE – 6361 ELECTRICAL DRIVES & CONTROL By Mr. S.SATHYAMOORTHI /R.RAJAGOPAL ASSISTANT PROFESSOR DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING SASURIE COLLEGE OF ENGINEERING VIJAYAMANGALAM – 638 056 1 R.RAJAGOPAL, S.SATHYAMOORTHI,AP/EEE 2015-16 EE 6361- ELECTRICAL DRIVES & CONTROL II/III MECHANICAL QUALITY CERTIFICATE This is to certify that the e-course material Subject Code : EE- 6361 Subject : Electrical Drives & Control Class : II Year MECH Being prepared by me and it meets the knowledge requirement of the university curriculum. Signature of the Author Name: R.RAJAGOPAL,S.SATHYAMOORTHI Designation: AP/EEE This is to certify that the course material being prepared by Mr.S.Sathyamoorthi / R.Rajagopal is of adequate quality. He has referred more than five books among them minimum one is from aboard author. Signature of HD Name: Mr. E.R.Sivakumar SEAL 2 R.RAJAGOPAL, S.SATHYAMOORTHI,AP/EEE 2015-16 EE 6361- ELECTRICAL DRIVES & CONTROL II/III MECHANICAL EE6361 ELECTRICAL DRIVES AND CONTROL Unit-I Introduction Basic elements-types of electric drives-factors influencing electric drives-heating and cooling curves- loading conditions and classes of duty-Selection of power rating for drive motors with regard to thermal overloading and load variation factors Unit-II Drive motor characteristics Mechanical characteristics- speed- torque characteristics of various types of load and drive motors - braking of electrical motors-dc motors: shunt, series, compound motors-single -
Reference List of Customers
Industrial Systems Group, Bangalore An ISO 90001 Unit Reference List of Customers 1 Rolling Mills...........................................................................................................2 2 Process Lines.........................................................................................................11 3 Steel Making.........................................................................................................13 4 Static Excitation Equipment..................................................................................17 5 Aluminium ............................................................................................................19 6 Cement ..................................................................................................................21 7 Paper......................................................................................................................23 8 Rubber ...................................................................................................................24 9 Mining & Material Handling.................................................................................25 10 Reactive Power Compensation..............................................................................28 11 Other Industries .....................................................................................................30 12 Other Industries – Sub_stations.............................................................................33 13 Pumping Station....................................................................................................34 -
Faculty of Degree Engineering - 083 Department of Electrical Engineering -09
Faculty of Degree Engineering - 083 Department of Electrical Engineering -09 Multiple Choice Questions Subject: Control of Electric Drives Branch: Electrical Engineering Subject code: 2160913 Semester: 6th 1. The selection of an electric motor for any application depends on which of the following factors ? (A) Electrical characteristics (B) Mechanical characteristics (C) Size and rating of motors (D) Cost (e) All of the above 2. For a particular application the type of electric-and control gear are determined by which of the following considerations ? (A) Starting torque (B) Conditions of environment (C) Limitation on starting current (D) Speed control range and its nature (e) All of the above 3. Which ofthefollowingmotors is preferred for traction work ? (A) Universal motor (B) D.C. series motor (C) Synchronous motor (D) Three-phase induction motor Dr. Subhash Technical Campus- The Jewel of Junagadh Faculty of Degree Engineering - 083 Department of Electrical Engineering -09 4 Which of the following motors always starts on load ? (A) Conveyor motor (B) Floor mill motor (C) Fan motor (D) All of the above 5 is preferred for automatic drives. (A) Squirrel cage induction motor (B) Synchronous motors (C) Ward-Leonard controlled D.C. motors (D) Any of the above 6. When the load is above a synchronous motor is found to be more economical. (A) 2 kW (B) 20 kW (C) 50 kW (D) 100 kW 7. The load cycle for a motor driving a power press will be (A) variable load (B) continuous (C) continuous but periodical (D) intermittent and variable load 8. Light duty cranes are used in which of the following ? (A) Power houses (B) Pumping stations (C) Automobile workshops (D) All of the above Dr. -
Lci's and Synchronous Motors Applied to Roller Mills
LCI'S AND SYNCHRONOUS MOTORS APPLIED TO ROLLER MILLS For Presentation at the IEEEIPCA Cement Industry Technical Conference Salt Lake City, UT May 2000 By: James F. Zayechek G E Industrial Systems 1. Abstract A cement company concerned about high power-factor penalty costs requested an evaluation of the feasibility of using synchronous motors starting through LCl's to drive three new roller mills at a cement plant. The prior experience with roller mills centered about the application of wound rotor induction motors with either cascaded secondary resistance or liquid rheostat. By utilizing synchronous motors, there was the possibility of providing leading power factor to reduce the reactive power demands seen by the utility feeding the cement plant. It was theorized that, if sufficient power factor correction could be obtained, the payback period of the incremental additional cost of the synchronous motor drive system would be very short. After payback of the initial investment, all future energy savings gravitate directly to the bottom line as additional revenue. Several key concerns had to be addressed in evaluating the use of synchronous motors for these relatively high starting torque requirement applications. This paper discusses the electrical and mechanical evaluation leading up to the decision to proceed with this new application of synchronous motors started through an LCI. 2. Introduction Roller mills, also known as vertical mills, are becoming more prevalent in modern cement plants. These mills have application both for raw material preparation and clinker grinding to final specifications. The increasingly competitive nature of today's business environment is pushing the mill OEM's to larger mills with greater throughput. -
The Performance of a Special Repulsion Motor in A
THE PERFORMANCE OF A SPECIAL REPULSION MOTOR IN A CLOSED-LOOP POSITIONING SYSTEM A THESIS Presented to the Faculty of the Graduate Division by Eugene Dale McCalia In Partial Fulfillment of the Requirements for the Degree Master of Science in Electrical Engineering Georgia Institute of Technology June, 1959 "In presenting the dissertation as a partial fulfillment of the requirements for an advanced degree from the Georgia Institute of Technology, I agree that the Library of the Institution shall make it available for inspection and circulation in accordance with its regulations governing materials of this type. I agree that permission to copy from, or to publish from, this dissertation may be granted by the professor under whose direction it was written, or, in his absence, by the dean of the Graduate Division when such copying or publication is solely for scholarly purposes and does not involve potential financial gain. It is understood that any copying from, or publication of, this dissertation which involves potential financial gain will not be allowed without written permission. THE PERFORMANCE OF A SPECIAL REPULSION MOTOR IN A CLOSED-LOOP POSITIONING SYSTEM Approved: Z2^__ ^ L.J& a M. Date of Approval: )vkv ^-6 ~ l<i^c/ .J- ...... ' •' ' "t' 11 ACKNOWLEDGMENTS The author wishes to acknowledge with appreciation his indebted ness to Dr. F. 0. Nottingham, Jr. who suggested the problem and also for the assistance and encouragement that he so cheerfully contributed throughout the course of this study, To my wife, I express appreciation for her love, patience and understanding and also for her assistance and encouragement in the preparation of the final draft. -
Semester Ii Electrical Drives and Controll 1 Printing Technology-Sde
SEMESTER II ELECTRICAL DRIVES AND CONTROLL EE A Course Material on ELECTRICAL DRIVES & CONTROL v 1 PRINTING TECHNOLOGY-SDE MODE SEMESTER II ELECTRICAL DRIVES AND CONTROLL 2 PRINTING TECHNOLOGY-SDE MODE SEMESTER II ELECTRICAL DRIVES AND CONTROLL EE6361 ELECTRICAL DRIVES AND CONTROL Unit-I Introduction Basic elements-types of electric drives-factors influencing electric drives-heating and cooling curves- loading conditions and classes of duty-Selection of power rating for drive motors with regard to thermal overloading and load variation factors Unit-II Drive motor characteristics Mechanical characteristics- speed- torque characteristics of various types of load and drive motors - braking of electrical motors-dc motors: shunt, series, compound motors-single phase and three phase induction motors Unit-III Starting methods Types of d.c motor starters-typical control circuits for shunt and series motors-three phase squirrel and slip ring induction motors Unit-IV Conventional and solid state speed control of D.C Drives Speed control of DC series and shunt motors-Armature and field control, ward-leonard control system- using controlled rectifiers and DC choppers –applications Unit-V Conventional and solid state speed control of AC drives Speed control of three phase induction motor-Voltage control, voltage/frequency control, slip power recovery scheme-using inverters and AC voltage regulators-applications TEXT BOOKS 1. VEDAM SUBRAMANIAM “Electric drives (concepts and applications)”, Tata McGraw-Hill.2001 2. NAGARATH.I.J & KOTHARI .D.P,”Electrical machines”, Tata McGraw-Hill.1998 REFERENCES 1. PILLAI.S.K “A first course on Electric drives”, Wiley Eastern Limited, 1998 2. M.D. SINGH, K.B.KHANCHANDANI,”Power electronics,” Tata McGraw-Hill.1998 3. -
Power Processing, Part 1. Electric Machinery Analysis
DOCONEIT MORE BD 179 391 SE 029 295,. a 'AUTHOR Hamilton, Howard B. :TITLE Power Processing, Part 1.Electic Machinery Analyiis. ) INSTITUTION Pittsburgh Onii., Pa. SPONS AGENCY National Science Foundation, Washingtcn, PUB DATE 70 GRANT NSF-GY-4138 NOTE 4913.; For related documents, see SE 029 296-298 n EDRS PRICE MF01/PC10 PusiPostage. DESCRIPTORS *College Science; Ciirriculum Develoiment; ElectricityrFlectrOmechanical lechnology: Electronics; *Fagineering.Education; Higher Education;,Instructional'Materials; *Science Courses; Science Curiiculum:.*Science Education; *Science Materials; SCientific Concepts ABSTRACT A This publication was developed as aportion of a two-semester sequence commeicing ateither the sixth cr'seventh term of,the undergraduate program inelectrical engineering at the University of Pittsburgh. The materials of thetwo courses, produced by a ional Science Foundation grant, are concernedwith power convrs systems comprising power electronicdevices, electrouthchanical energy converters, and associated,logic Configurations necessary to cause the system to behave in a prescribed fashion. The emphisis in this portionof the two course sequence (Part 1)is on electric machinery analysis. lechnigues app;icable'to electric machines under dynamicconditions are anallzed. This publication consists of sevenchapters which cW-al with: (1) basic principles: (2) elementary concept of torqueand geherated voltage; (3)tile generalized machine;(4i direct current (7) macrimes; (5) cross field machines;(6),synchronous machines; and polyphase -
Dynamic Suspension Modeling of an Eddy-Current Device: an Application to Maglev
DYNAMIC SUSPENSION MODELING OF AN EDDY-CURRENT DEVICE: AN APPLICATION TO MAGLEV by Nirmal Paudel A dissertation submitted to the faculty of The University of North Carolina at Charlotte in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Electrical Engineering Charlotte 2012 Approved by: Dr. Jonathan Z. Bird Dr. Yogendra P. Kakad Dr. Robert W. Cox Dr. Scott D. Kelly ii c 2012 Nirmal Paudel ALL RIGHTS RESERVED iii ABSTRACT NIRMAL PAUDEL. Dynamic suspension modeling of an eddy-current device: an application to Maglev. (Under the direction of DR. JONATHAN Z. BIRD) When a magnetic source is simultaneously oscillated and translationally moved above a linear conductive passive guideway such as aluminum, eddy-currents are in- duced that give rise to a time-varying opposing field in the air-gap. This time-varying opposing field interacts with the source field, creating simultaneously suspension, propulsion or braking and lateral forces that are required for a Maglev system. In this thesis, a two-dimensional (2-D) analytic based steady-state eddy-current model has been derived for the case when an arbitrary magnetic source is oscillated and moved in two directions above a conductive guideway using a spatial Fourier transform technique. The problem is formulated using both the magnetic vector potential, A, and scalar potential, φ. Using this novel A-φ approach the magnetic source needs to be incorporated only into the boundary conditions of the guideway and only the magnitude of the source field along the guideway surface is required in order to compute the forces and power loss. -
A Survey of Propulsion Systems for High Capacity Personal Rapid Transit
T NO UMTA-MA-06-0 04 8-75-2 A SURVEY OF PROPULSION SYSTEMS FOR HIGH CAPACITY PERSONAL RAPID TRANSIT Thorleif Knutrud JULY 1975 FINAL REPORT DOCUMENT IS AVAILABLE TO THE PUBLIC THROUGH THE NATIONAL TECHNICAL INFORMATION SERVICE, SPRINGFIELD VIRGINIA 22161 Prepared for u.s. DEPARTMENT OF TRANSPORTATION URBAN MASS TRANSPORTATION ADMINISTRATION Office of Research and Development Washington DC 20590 . NOTICE This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Govern- ment assumes no liability for its contents or use thereof NOTICE The United States Government does not endorse products or manufacturers. Trade or manufacturers' names appear herein solely because they are con- sidered essential to the object of this report. 7 , Htr . /V3 a/c? “DOT - Tsc- u. ~7&~ /£“ TECHNICAL REPORT STANDARD TITLE RAGE 3. Recipient's Catalog No. 1 . Report No. 2. Government Accesnon No. UMTA-MA- 0 6- 0 048-75-2 5. Report Date 4. T i tie and Subtitle July 1975 A SURVEY OF PROPULSION SYSTEMS FOR 6. Performing Organization Code HIGH CAPACITY PERSONAL RAPID TRANSIT 7. Author's) 8. Peefarming Orgonrzatron Report No Thorleif Knutrud DOT -TSC -UMTA-7 5-15 9. Performing Organization Name and Address 10. Work Unit No UM533/R6751 Alexander Kusko, * Inc.* 11. Controct or Grant No 161 Highland Avenue DOT -TSC- 2 03/DOT- TSC- 965 Needham Heights MA 02194 15. 13. Type of Report and Period Covered 12. Sponsoring Agency Nome ond Address Final Report U.S. Department of Transportation July 1974 - June 1975 16.Urban Mass Transportation Administration Office of Research and Development 14. -
Brushless DC Electric Motor
Please read: A personal appeal from Wikipedia author Dr. Sengai Podhuvan We now accept ₹ (INR) Brushless DC electric motor From Wikipedia, the free encyclopedia Jump to: navigation, search A microprocessor-controlled BLDC motor powering a micro remote-controlled airplane. This external rotor motor weighs 5 grams, consumes approximately 11 watts (15 millihorsepower) and produces thrust of more than twice the weight of the plane. Contents [hide] 1 Brushless versus Brushed motor 2 Controller implementations 3 Variations in construction 4 AC and DC power supplies 5 KM rating 6 Kv rating 7 Applications o 7.1 Transport o 7.2 Heating and ventilation o 7.3 Industrial Engineering . 7.3.1 Motion Control Systems . 7.3.2 Positioning and Actuation Systems o 7.4 Stepper motor o 7.5 Model engineering 8 See also 9 References 10 External links Brushless DC motors (BLDC motors, BL motors) also known as electronically commutated motors (ECMs, EC motors) are electric motors powered by direct-current (DC) electricity and having electronic commutation systems, rather than mechanical commutators and brushes. The current-to-torque and frequency-to-speed relationships of BLDC motors are linear. BLDC motors may be described as stepper motors, with fixed permanent magnets and possibly more poles on the rotor than the stator, or reluctance motors. The latter may be without permanent magnets, just poles that are induced on the rotor then pulled into alignment by timed stator windings. However, the term stepper motor tends to be used for motors that are designed specifically to be operated in a mode where they are frequently stopped with the rotor in a defined angular position; this page describes more general BLDC motor principles, though there is overlap. -
Resistor Control of Wound Rotor Motors Resistor Control of Wound Rotor Motors
RESISTOR CONTROL OF WOUND ROTOR MOTORS RESISTOR CONTROL OF WOUND ROTOR MOTORS The Wound Rotor Induction Motor or Slip Ring Motor is widely used for applications requiring speed control or low starting currents. It is very similar to the Squirrel Cage Induction Motor except that the rotor leads are brought out through slip rings (commutator rings) so that external resistance may be inserted. In fact, if we shorted these three rotor leads together, we would basically have a squirrel cage motor. The beauty of the WRM is that we can control the torque of the motor with external resistors. The purpose of this paper is to show how these resistors are sized and connected for simple speed control or starting duty. STATIR CIRCUIT The Stator, or stationary winding, of the WRM is a three-phase winding which has a cylindrical shape and occupies the outer part of the motor just inside of the motor frame. The three primary leads are usually connected (through a contactor) to the 460 VAC 3ph, 60hz power lines. The three- phase power, applied to the stator windings, produces a rotating magnetic field. The mathematics are complex and will not be covered here. The main thing to remember is that a constantly rotating magnetic field is produced whenever the stator is energized. The speed or RPM of this rotating magnetic field is a function of how many “poles” are created by the windings and the frequency of the incoming power (60 cycles per second in this country, 50 cycles per second in many European countries). With 60hz power, this synchronous RPM is a multiple of 60 such as 360, 900, 1800, etc. -
ADJUSTABLE SPEED DRIVES By: Richard D
Service Application Manual SAM Chapter 620-130 Section 6A ADJUSTABLE SPEED DRIVES By: Richard D. Beard P.E. Consultant, RSES Manufacturers’ Service Advisory Council INTRODUCTION Many commercial and industrial machines and processes require adjustable speed. Adjustable speed usually makes a machine more universally compatible and increases its versatility. Adjustable-speed drives also are being used in residential equipment, including air conditioners, refrigerators, heat pumps, furnaces, and other devices driven by motors. These drives optimize speed and torque, making them generally more efficient than non-adjustable-speed drives. An adjustable-speed motor is one in which the speed can be varied gradually over a wide range—but, once adjusted, it remains nearly unaffected by the load. A variable-speed motor is one in which the speed varies with the load, usually decreasing when the load increases. The term "adjustable speed" implies that some external adjustment, which is independent of load, will cause the speed to change. A variable-frequency inverter drive is an example. The term "variable speed" describes a drive in which load changes inherently cause significant changes in speed. A direct current series motor, for example, exhibits this characteristic. An adjustable variable-speed motor is one in which the speed can be adjusted gradually. However, once adjusted for a given load, the speed will vary with changes in the load. A multispeed motor is one that can be operated at any one of two or more definite speeds, each being practically independent of the load. The multispeed motor is neither an adjustable-speed nor a variable-speed drive. Multispeed motors usually have two, three, or four definite operating speeds.