EE3730 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES
UNIT I - INTRODUCTION
Conventional design procedures -Limitations -Need for field analysis based design.
UNIT II - MATHEMATICAL FORMULATION OF FIELD PROBLEMS
Development of torque/force -Electromagnetic Field Equations -Magnetic Vector/Scalar
potential -Electrical Vector/Scalar potential- Stored energy in field problems –Inductances -
Laplace and Poisson's Equations -Energy functional- Principle of energy conversion.
UNIT III - PHILOSOPHY OF FEM
Mathematical Models -Differential/Integral equations -Finite Difference method -Finite Element
Method -Energy minimization -Variational method -2D Field problems - Discretisation- Shape
functions -Stiffness matrix -Solution techniques.
UNIT IV - CAD PACKAGES
Elements of a CAD System -Preprocessing -Modelling -Meshing -Material properties -Boundary
Conditions -Setting up solution -Postprocessing.
UNIT V - DESIGN APPLICATIONS
Design of Solenoid Actuator -Induction Motor -Switched Reluctance Motor –Synchronous
Machines.
EE3731 EMBEDDED SYSTEM DESIGN
UNIT I- INTRODUCTION TO EMBEDDED SYSTEM
Introduction to functional building blocks of embedded systems – Register, memory devices,
ports, timer, interrupt controllers using circuit block diagram representation for each categories.
UNIT II- PROCESSOR AND MEMORY ORGANIZATION
Structural units in a processor; selection of processor & memory devices; shared memory; DMA;
interfacing processor, memory and I/O units; memory management – Cache mapping techniques,
dynamic allocation - Fragmentation.
UNIT III- DEVICES & BUSES FOR DEVICES NETWORK
I/O devices; timer & counting devices; serial communication using I2C, CAN, USB buses;
parallel communication using ISA, PCI, PCI/X buses, arm bus; interfacing with devices/ports,
device drivers in a system – Serial port & parallel port.
UNIT IV- I/O PROGRAMMING SCHEDULE MECHANISM
Intel I/O instruction – Transfer rate, latency; interrupt driven I/O - Non-maskable interrupts;
software interrupts, writing interrupt service routine in C & assembly languages; preventing
interrupt overrun; disability interrupts.
Multi threaded programming – Context switching, premature & non-premature multitasking,
semaphores.
Scheduling – Thread states, pending threads, context switching, round robin scheduling, priority
based scheduling, assigning priorities, deadlock, watch dog timers.
UNIT V- REAL TIME OPERATING SYSTEM (RTOS)
Introduction to basic concepts of RTOS, Basics of real time & embedded system operating
systems, RTOS – Interrupt handling, task scheduling; embedded system design issues in system
development process – Action plan, use of target system, emulator, use of software tools.
EE 3728 SPECIAL MACHINES AND CONTROLLERS
UNIT I- SYNCHRONOUS RELUCTANCE MOTORS
Constructional features-Types-Axial and radial air gap motors-operating principle-Reluctance-
Phasor diagram-Characteristics-Vernier motor.
UNIT II - STEPPING MOTORS
Constructional features, principle of operation, modes of excitation torque production in Variable
Reluctance (VR) stepping motor, Dynamic characteristics, Drive systems and circuit for open
loop control, Closed loop control of stepping motor.
UNIT III - SWITCHED RELUCTANCE MOTORS
Constructional features, principle of operation. Torque equation, Power controllers,
Characteristics and control Microprocessors based controller.
UNIT IV - PERMANENT MAGNET BRUSHLESS DC MOTORS
Commutation in DC motors, Difference between mechanical and electronic commutators, Hall
sensors, Optical sensors, Multiphase Brush less motor, Square wave permanent magnet brushless
motor drives, Torque and emf equation, Torque-speed characteristics, Controllers-
Microprocessors based controller.
UNIT V -PERMANENT MAGNET SYNCHRONOUS MOTORS
Principle of operation, EMF, power input and torque expressions, Phasor diagram, Power
controllers, Torque speed characteristics, Self control, Vector control, Current control schemes.
EE3727 HVDC TRANSMISSION
UNIT I - GENERAL ASPECTS
Historical development HVAC and DC links – kinds of DC links-HVDC projects in India and
abroad – advantages and disadvantages of HVDC transmission – principal applications of DC
transmission – economic factors – development of power devices for HVDC transmission –
thyristors – light activated thyristors – MOS controlled thyristors (MCTs) – Switching and
steady state characteristics.
UNIT II-THYRISTOR CONVERTERS
Three phase fully controlled thyristor bridge converters – operation as rectifiers and line
commutated inverters – converter equivalent circuits – parameters and characteristics of
rectifiers and inverters – series and parallel arrangement of thyristors – multibridge
converters.
UNIT III- CONTROL OF CONVERTERS
Gate control – basic means of control – power reversal – desired features of control – control
characteristics – constant current control – constant extinction angle control – stability of control
– tap changer control – power control and current limits.
UNIT IV-PROTECTION
Basics of protection of HVDC systems – DC reactors – voltage and current oscillations – DC
line oscillations – clearing line faults and re-energizing the line – circuit breakers – over voltage
protections.
UNIT V- HARMONICS, FILTERS AND GROUND RETURN
Characteristics and uncharacteristic harmonics – troubles caused by harmonics – means of
reducing harmonics – telephone interference – harmonic filters – ground return – current fields –
compatibility with other services electrodes.
EE3721 SOLID STATE DRIVES
UNIT I - CHARACTERISTICS OF ELECTRIC DRIVES
Speed -torque characteristics of various types of loads and drive motors -Joint speed-torque
characteristics - selection of power rating for drive motors with regard to thermal overloading
and load variation factors - load equalization - starting, braking and reversing
operations.
UNIT II - DC DRIVES
Speed control of dc motors - Ward- Leonard scheme - drawbacks - thyristor converter fed dc
drives: single, two and four quadrant operations – SRM drive – Micromotor drive.
chopper fed dc drives: Time ratio control and current limit control - single, two and four
quadrant operations - effect of ripples on the dc motor performance
UNIT III - THREE PHASE INDUCTION MOTOR DRIVES
Speed control of three phase induction motors - stator control - stator voltage and frequency
control - Ac chopper, inverter and Cycloconverter fed induction motor drives, rotor control -
rotor resistance control and slip power recovery schemes - static control of rotor resistance
using dc chopper - static Kramer and Scherbius
drives.
UNIT IV - THREE PHASE SYNCHRONOUS MOTOR DRIVES
Speed control of three phase synchronous motors - voltage source and current source inverter
fed synchronous motors - commutatorless dc motors - Cycloconverter fed synchronous
motors - effects of harmonics on the performance of ac motors - closed loop control of drive
motors.
UNIT V - DIGITAL CONTROL AND DRIVE APPLICATIONS
Digital techniques in speed control - advantages and limitations - microprocessor based
control of drives - selection of drives and control schemes for steel rolling mills, paper mills,
lifts and cranes.
SOLID STATE DRIVE LABS
1.Performance of Chopper fed D.C. Drive.
2.Operation of a four quadrant Chopper on D.C. Drive
3.Operation of a 1-phase A.C. Voltage controller on motor load.
4.Operation of a 3-phase A.C Voltage controller on a 3- phase Squirrel Cage Induction
Motor.
5. Performance & speed control of S.C. Induction motor by Static Rotor Resistance
Controller.
6. Performance & speed control of D.C motor by single phase Semi-converter.
7. 2-Quadrant operation of a 1-phase Full Converter using D.C. drive.
8. Performance & speed control of D.C. drive using 3-phase Semi-Converter.
9. Performance & speed control of 3-phase Induction motor using 3-phase PWM Inverter.
10. Performance & speed control of S.C. Induction motor using cyclo-converter
CS 3728 ADVANCED NETWORKING
UNIT I - DATA COMMUNICATIONS
Introduction to Networks and Communication Media: Uses- Network Hardware- Network
Software- Components and Categories – types of Connections – Topologies –Protocols and
Standards – ISO / OSI mode - Reference Models. Basis for data communication- Transmission
Media- Wireless Transmission- Telephone Systems- Satellite Communication– RS232
Interfacing sequences
UNIT II - DATA LINK LAYER
Error – detection and correction – Parity – LRC – CRC – Hamming code – low Control and
Error control - stop and wait – go back-N ARQ – selective repeat ARQ- sliding window –
HDLC. - LAN - – Reliable Transmission– Token Rings – Wireless – Network Adapters -
Ethernet IEEE 802.3 - IEEE 802.4 - IEEE 802.5 - IEEE 802.11 – FDDI - SONET – Bridges..
UNIT III - NETWORK LAYER
Internetworks – Packet Switching and Datagram approach – IP addressing methods – Subnetting
– Routing – Distance Vector Routing – Link State Routing – Routers.
UNIT IV - TRANSPORT LAYER
Duties of transport layer – Multiplexing – Demultiplexing – Sockets – User Datagram Protocol
(UDP) – Transmission Control Protocol (TCP) – Congestion Control – Quality of services
(QOS) – Integrated Services.
UNIT V - APPLICATION LAYER
Domain Name Space (DNS) – SMTP – FTP – HTTP - Electronic Mail - WWW – Network
Security – Cryptography. The Application layer: Application layer design issues - Multimedia-
Other applications- - DES- RSA.
EE 3719 HIGH VOLTAGE ENGINEERING
UNIT I- GENERATION OF HIGH VOLTAGES
Generation of High DC. voltages – Half Wave and full wave circuits – Ripple voltages in HW
and FW rectifiers. Voltage doubler circuits – Simple voltage doubler and cascade voltage
doubler. Voltage multiplier circuits – Crockroft Walton voltage multiplier circuits. Ripple and
regulation. Electrostatic machines – principles – Van de Graff generator. Generation of high AC
voltages: Cascade transformers, resonant transformers – parallel and series resonant test systems.
Generation of high frequency high voltages – Tesla coil.
UNIT II -GENERATION OF IMPULSE VOLTAGES AND CURRENT
Generation of impulse voltages – Standard impulse wave shape Basic circuits for producing
impulse waves – Analysis of commercial impulse generator circuits – Wave shape control, multi-
stage impulse generators – Marx circuit – modified Marx impulse generator circuit –
Components of multi stage impulse generator. Generation of Switching surges. Generation of
impulse current. Definition of impulse current waveform – Circuit for prod using impulse
current waves.
UNIT III- PRINCIPLES OF INSULATION CO ORDINATION
Principles of insulation co ordination on HV and EHV power systems: Over voltage and their
significance – insulation level of an equipment. Insulation co-ordination of a substation.
Insulation coordination of EHV systems – Terms and definitions- Normal system voltage,
highest system voltage, over voltage.
UNIT IV- OVER VOLTAGES IN ELECTRICAL POWER SYSTEMS
Protective devices against lightning over voltages – rod – rod gaps, overhead ground wires –
voltage – current characteristic of surge arrestors, Thyrite & ZnO arresters. Switching over
voltages – origin and characteristics – switching over voltage in EHV and UHV systems.
Switching over-voltages in EHV substation (400 K V AC, 765 K V AC) Control of over voltages
due to switching – Method for reducing switching over voltage. Connections and rated voltages
of surge arresters.
UNIT V -HIGH VOLTAGE TESTING
Non- destructiv e testing of dielectric materials – measurement dielectric constant and loss
factor. Partial discharge phenomena – discharge detection using straight detectors. HV testing of
electrical apparatus – Definitions – Terms and conditions. Test on insulators, bushings, cables,
transformer surge arrester, High current impulse test on surge arresters HV and EHV bushing
design, selection, quality control, maintenance and diagnostic testing
EE 3720 ELECTRICAL MACHINE DESIGN
UNIT I- PRINCIPLES OF ELECTRICAL MACHINE DESIGN AND COOLING
METHODS
Principles of electrical machine design - general design considerations - specifications of
machines - types of enclosures - types of ventilations - hydrogen cooling - heating - short - time
rating – overload capacity - temperature rise time curve - hotspot rating. Review of properties of
materials used in electrical machines.
UNIT II -TRANSFORMERS
Design of power transformers - single phase and three phase transformers - distribution and
power transformers - output equation - specific magnetic loading - core design - window area,
window space factor - overall dimensions of core. Windings number of turns - current density -
conductor section - types of coils - insulation electric stress. Cooling of transformers - design of
cooling tank and tubes.
UNIT III- MAGNETIC CIRCUITS AND D.C. MACHINES
Field flux distribution curve - field form factor - magnetic leakage co-efficient calculation of
field ampere turns - air gap mmf- effect of slot and ventilating duct - active iron length - mmf for
teeth – real and apparent flux densities - mmf per pole - design electromagnet. Design of dc
machines – output equations - specific loading - choice of speed and number of poles -
calculation of main dimensions - choice of type of winding - number of slots - number of
conductors per slot - current density – conductor section - slot insulation - length of air gap.
UNIT IV- SYNCHRONOUS MACHINES
Design of field winding - excitation voltage - conductor cross-section -height of pole - design of
interpole - flux density under interpole - calculation of interpole winding. Design of synchronous
machines - specific loading - output equation - main dimensions - types of winding - number of
turns - number of slots and slot design - field design for waterwheel and turbo alternators -
cooling of alternators.
UNIT V- THREE PHASE INDUCTION MOTORS
Design of three phase induction motors - main dimensions - stator design - squirrel cage and slip
ring type - number of stator and rotor slots - rotor bar current - design of rotor bar - end ring
current – design of end ring - design of slip ring rotor winding. Introduction to computer aided
design. Analysis and synthesis methods - hybrid techniques - optimization - electrical machine
design - general procedure - simple programs.
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