Wednesday, 16 March 2016
6th sem syllabus for Sub: EPS-II mid Sem March /April 2016
Chapter -- 1 Voltage and current relationship in transmission line.
Chapter -- 2 Symmetrical fault analysis
Chapter -- 3 symmetrical components
Chapter -- 4 Corona
Tuesday, 15 March 2016
MID SEM SYLLABUS FOR UTILIZATION OF ELECTRICAL ENENRGY AND TRACTION (SEM 6)
SUBJECT CODE: 2160907 B.E.
6th SEMESTER
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Electric Drives:
Advantages of electric drives, Characteristics of different mechanical loads,
Types of motors used in electric drive,
Electric braking, Plugging, Rheostat braking, Regenerative braking, Methods of
power transfer by direct coupling by using devices like belt drive, gears,
pulley drives etc.
Examples of selection of motors for different types of domestic loads,
Selection of drive for applications such as general workshop, textile mill,
paper mill, steel mill, printing press, crane, lift etc. Application of
flywheel.
Specifications of commonly used motors e.g. squirrel cage, slip ring
induction motors, AC series motors, FKW motor.
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Monday, 14 March 2016
MID SEM EXAM SYLLABUS DIGITAL ELECTRONICS(4TH SEM)
SUBJECT CODE: 2140910
1 Number Systems:
Decimal, Binary, octal, and hexa-decimal number systems, binary arithmetic. Number
base conversion, Complements Codes: Binary code, excess-3 code, gray code,
error detection and correction codes.
2 Logic families: Positive logic and Negative Logic, AND, OR,
NOT,NAND,NOR, X-OR GATE, INHIBIT CIRCUIT, Significance and type like TTL, CMOS,
interface with different logic families, application relevant information, electrical
characteristics.
3 Boolean Algebra:
Introduction, Logic Operators, Postulates and theorems, properties –Product of
Sums and Sum of Products– Karnaugh Map method – Two, three, four, five variable
K-maps, Converting Boolean expressions to Logic and Vice versa, NAND and NOR
implementation – Don’t-Care conditions – The tabulation method
4 Combinational Logic
Circuit: Half and full Adder – Half
and full Subtracter – Binary parallel adder·
– BCD Adder, Decimal adder – Magnitude comparator – Encoders & Decoders – Multiplexers–De-multiplexer
5 Flip Flops and Sequential Logic and
Circuits: Basic difference between
Combinational logic and Sequential logic –·
Flip-Flops like S-R , J-K, D, Triggering of (level and Edge) flip flop.
Note: Refer last 5 GTU question papers.
Prof. D.R.Dobariya/ Prof. P.K.Shah
| Question bank (8Th semester) | |
| Electrical Machine Design - II [ subject code : 180904] | |
| 1 | Derive an output equation for 3-ф induction motor with usual notation. |
| 2 | Write a short note on Harmonic induction torque and Harmonic synchronous torque of squirrel cage induction motor Also give its effect on the selection rotor slots. |
| 3 | Explain the points to be considered for the selection of number of stator slots of an 3-phase induction motor. |
| 4 | Explain the factors affecting the choice of specific magnetic & electric loading in case of a induction machine. |
| 5 | State the rules for selecting rotor slots of an 3-phase induction motor. Also explain the methods for the reduction of harmonic torque. |
| 6 | Explain the current distribution in the bars and the end rings of a squirrel cage induction motor. Also derive the relation for the current in the end ring. |
| 7 | Discuss the Methods to reduce the harmonic torque in induction motor |
| 8 | Discuss the effect of air gap length on the performance of a 3-phase induction motor. |
| 9 | What is dispersion coefficient? What is its effect on (i)max. power factor (ii) over load capacity of induction motor? |
| 10 | Derive the equation of rotor resistance referred to stator side, for a squirrel cage induction motor. |
| 11 | Discuss the advantages achieved on selecting larger air gap in a three phase induction motor. |
| 12 | Discuss how the magnetizing current can be estimated from the design data in a three phase induction motor. |
| 13 | Discuss the effect of variation of main dimension(D&L) on performance (Rating, losses & efficiency) of 3-ф induction motor |
| 14 | What are the factors affecting the length of air gap in 3-ф induction motor. |
| 15 | Discuss the different types of stator slots used in 3-ф induction motor |
| 19 | Prove that torque produce by 5TH harmonics is in backward direction & 7TH harmonics is in forward direction. |
| 20 | State the rules for the selection of rotor slots. Describe the methods for reducing the effect of harmonics torque. |
| 21 | Explain the effect of skewing the rotor slots in a squirrel cage induction motor. |
| 22 | Explain the factors affecting the choice of specific magnetic & electric loading in case of a synchronous machine. |
| 23 | Define SCR and its importance in designing of synchronous machine. |
| 24 | Explain the terms “critical speed” and “run away speed” with reference to synchronous machine. |
| 25 | Define and explain the term “short circuit ratio” of a synchronous generator and discuss its influences on the machine performance. |
| 26 | Explain the factors affecting the choice of specific magnetic & electric loading in case of a synchronous machine. |
| 27 | Derive an output equation for 3-ф Synchronous machines with usual notation. |
| Numericals ( For Reference) | |
| Electrical Machine Design - II [ subject code : 180904] | |
| 1 | A 15-kW, 440-V, 4-pole, 50-Hz, 3-phase induction motor is built with a stator bore 0.25m and a core length of 0.16. The specific electric loading is 23000 ampere conductors/meter. Using the data of this machine, determine the core dimensions, number of stator slots and number of stator conductors for 11-kW, 460-V, 6 pole, 50-Hz motor. Assume a full-load efficiency of 84% and power factor of 0.82 for each machine. The winding factor is 0.955. |
| 2 | A 15 kW, 400V , 3-phase , 50Hz, 6-pole induction motor has a diameter of 0.3m and the length of the core 0.12m. The number of stator slots is 72 with 20 conductors per slot. The stator is delta connected. Calculate the value of magnetizing current per phase if the length of air gap is 0.55m. The gap contraction factor is 1.2. Assume the mmf required for the iron parts to be 35 per cent of the air gap mmf. Coil span =11 slots. |
| 3 | Determine the main dimensions, Number of radial ventilating ducts and the turns per phase of a 3.7 KW, 400V, 3-Phase, 4-pole, 50Hz squirrel cage induction motor which is to be started using a star-delta starter. Assume:-Average flux density in the gap=0.45wb/m2, Ampere conductors per meter=23000, efficiency=0.85, Power factor=0.84. Choose the main dimension to give an overall good design. |
| 4 | Determine main dimensions and turns per phase of a 2 MVA, 11 kV 50 Hz 24 pole three phase star connected alternator. Assume average gap density of 0.55 wb/m2, ac = 30000, winding factor 0.955. Use L/τ ratio of 1.25. |
| 5 | The following data refer to a 100 hp , 50 Hz, 8 pole 500 V , slip ring induction motor with 3 phase star connected stator winding: Turns per phase: Stator 64; Rotor 35. Resistance per phase: Stator 0.062 Ω; Rotor 0.019 Ω. Reactance per phase: Stator 0.21Ω; Rotor 0.019Ω.Magnetizing current 35 A/phase.Iron loss 1495W.Friction and Windage loss 760 W. Draw circle diagram and determine The line current, efficiency, power factor and slip at full load and half load conditions. Also find Maximum output and pull out torque. |
| 6 | Determine the main dimensions of 20 kW, 3 phases, 400 V 50 Hz, 1450 rpm squirrel cage induction motor. Assume following: Full load efficiency: 85%. Full load power factor: 0.89 lag. Winding factor: 0.955.Specific magnetic loading: 0.45 wb/m2. Specific electrical loading 28000 A/m. Rotor peripheral speed 20 m/sec at synchronous speed. |
| 7 | An 11 kW, 3phase, 6 pole, 50 Hz, 220 V star connected induction motor has 54 stator slots, each containing 9 conductors. Calculate the values of bar and end ring currents. The number of rotor bars is 64. The machine has an efficiency of 0.86 and a power factor of 0.85. The rotor mmf may be assumed as 85 percent of stator mmf. Also find the bar and the end ring sections if the current density is 5 A/mm2. |
| 8 | The output coefficient of 968KW, 11KV, 0.9 power factor, 20pole, 50Hz,Delta connected induction motor is 200kva/m3-rps. Find the value of main dimension of the machine if the ratio of length to diameter is 0.2. Also calculate the value of main dimension if the specific loadings are increase by 10% each. Assume that, Efficiency=86%. |
| 9 | The losses of 11kw,3-ф,4kv,50Hz,1000rpm induction motor are as below:Total copper loss=950W, total iron loss=500W, total mech. Loss=110W Find the output, losses & Efficiency of a similar motor with linear dimensions 1.44 times those of given motor. |
| 10 | Find the main dimensions, number of stator turns per phase, size of conductors & number of stator slots for a 5HP, 400v, 50Hz, 1500rpm,3-ф squirrel cage induction motor. Assume that: specific magnetic loading=0.46wb/m2, specific electric loading=22000ac/m, Efficiency=83%, power factor=0.84, stator winding factor=0.955. Suggest for cheap design. |
| 11 | Obtain the main dimensions for a peripheral speed of 15m/s for 30HP, 440v, 50Hz, 1000rpm,3-ф squirrel cage induction motor. Assume that: specific magnetic loading=0.46wb/m2, specific electric loading=25000ac/m, Efficiency=86%, power factor=0.87, stator winding factor=0.955.Also calculate number of stator turns per phase &size of conductors |
| 12 | Determine the main dimensions and Turns per phase (Tph) of a 3000 KVA, 6.6 KV,50HZ, 187 RPM , 3 phase, star connected alternator. Assume average flux density =0.58 wb/m2 ac=35000.Assume pole arc/pole pitch=0.7 |
| 13 | Calculate the diameter, core length, no of conductors of the stator , size of conductor,no of stator slots of 30 MVA, 11KV, 3000RPM, 50 HZ, star connected Turbo alternator. Assume Bav= 0.55 Wb/m2, ac=55000 A/m Kw=0.955, peripheral velocity= 160m/s |
| 14 | Find the current in the bars and end rings of a cage rotor of a 6 pole 3 phase,induction motor having 72 stator slots with 15 conductors in each slot if the stator current per phase is 20A and rotor slots are 55. Hence find the suitable size of the cage bars and end rings. |
| 15 | Find the main dimensions, no of stator turns, and number of stator slots of a 30 H.P., 440 Volt, 3 phase, 50 Hz , 960 rpm, sq. cage Induction motor using following data: Specific magnetic loading=0.45wb/m2,Sp.ele.loading=250amp.condctors/cm full load efficiency= 0.86, full load p.f. =0.87.Assume that stator winding is delta connected, for normal running. |
| 16 | Determine the main dimensions, turn per phase, number of slots, conductor section and slot area of a 3-phase, 5 H.P., 400 volts, 50 Hz, 1500 rpm squirrel cage induction motor. The machine is to be started by a star-delta starter.Assume: Average flux density in the air gap = 0.5 Wb/m2, ampere conductors per meter =27000, efficiency = 0.8, power factor = 0.8 lagging at full load, winding factor = 0.955, current density = 3.5 A/mm2. Choose main dimensions to give Good overall design. |
MID-SEMESTER TEST SYLLABUS
for SUBJECT
Electrical
Machine Design-II(8Th semester)[subject code : 180904]
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Content
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1
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Induction motor design: Output equation,
choice of specific scheme, separation of D
& L, peripheral Stator winding design, Calculation of no. of turns
per phase,
conductor’s area shape of the stator slots, factors to be considered
while deciding no of
stator slots, Area of stator slots, stator winding resistance, stator
teeth design, depth of
the stator core, examples related to above topics, Length of the air gap.
Rotor design A. Squirrel cage rotor – selection of no. of rotor slots,
harmonic induction
torque. Harmonic synchronous torque, vibration and noise, voltage
ripples, rules for
selecting no. of rotor slots, Methods for reducing harmonic torque,
design of rotor bars
and slots, calculation of rotor bar current, area of rotor bars, shape of
rotor slots,
examples, Design of end rings, Calculation of end rings current,
cross-sectional area of
end rings.
B. Design of wound rotor - calculation of number of rotor slots, no. of
turns, crosssectional
area of rotor conductors, types of rotor windings, check for rotor tooth
density, design of rotor core, examples Estimation of operating
characteristics- no load
current calculation, short circuit current calculation, stator and rotor
resistance and
reactance calculation, examples, circle diagram, Dispersion coefficient –
effect on
maximum output power factor
Performance calculation
Design aspects for large size machine, high voltage m/c, High speed m/c,
algorithm and
flow chart Design of submersible motors
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2
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Synchronous machine design Introduction, output
equations, Main dimension, SCR,
effect of SCR on machine performance Length of air gap and shape of pole
face
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Important GTU PMMS guidelines and deadlines
The website for student project activity on GTU PMMS portal: http://projects.gtu.ac.in/ is made live on 29.01.2016
Please refer following important GTU PMMS guidelines:
This includes brief information about all activities (PPR, PDE, BMC etc...), which are to be performed by students during their final year project.
This includes brief about following matters:
a) Guideline for student movement from B.E. 7th semester to 8th semester.
b) Guideline for student’s project team formation in 8th semester (Options and process for team and/or project change during 8th semester)
c) Mentor Management and involvement of external mentors with student’s project.
Below table represents, the list of activity to be performed during semester 8 project activities, important study and reference material for each of those activities are available at linked documents. Refer those material to have more information for each of those activities.
Activity
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Team activity or Individual Activity
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Brief information about the activity is available at linked guideline document, refer for more information
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Student registration
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Individual student activity
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Team formation
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Team activity
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Periodic Progress Report (PPR)
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Individual student activity
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Business Model Canvas (BMC) and its report upload
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Team activity
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Patent Drafting Exercise (PDE)
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Team activity
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Final project report upload.
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Team activity
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Uploading the plagiarism search report
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Team activity
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Completion Certificate generation
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Individual student activity
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Till now the functionality for 1. Student Registration 2. Team Formation 3. PPR 4. BMC & 5. PDE is made live (for students to upload the data, and for faculty to review the same). If you had not finished this task then kindly please finish it earliest.
GTU PMMS team also has generated couple of small blog articles to address the problem and query of PMMS users. You may access those blogs at: http://gic-info.blogspot.in/ and also at:http://projects.gtu.ac.in/_layouts/15/GTUPMMS/FAQ.aspx
Kidly use the DASHBOARD functionality given under faculty/HOD/Principal's PMMS account, and please ensure that all students progress timely to accomplish all tasks timely.
Do not reply to this mail, in case of any query kindly please contact at the details given on page: Contact Us
Thanks and Regards
Team PMMS @ GTU Innovation Council
Mid Sem Syllabus of PSPD, 8th Elect.
Ch. 1,2,3 & 7 - FULL
Also refer GTU papers of Sub. Code: 180903 dated: 7/12/15, 13/5/15, 2/12/14 etc.
Prof. K.S.Shah
Also refer GTU papers of Sub. Code: 180903 dated: 7/12/15, 13/5/15, 2/12/14 etc.
Prof. K.S.Shah
Mid Sem Syllabus of DDCMT, 6th Elect.
Ch.1 GENERAL DESIGN ASPECTS:
Specific electric loading and Specific magnetic loading; Output coefficient; Output equations for transformers and rotating machines; Factors affecting size of machines; Criteria for selection of specific loadings; Heating and Cooling of Transformers and rotating machines.
Ch 2 DESIGN OF THREE PHASE TRANSFORMER:
Types of transformers; Position of HV and LV windings and its importance; Relation between core and yoke cross section area and its significance; Different types of transformer windings; Different positions of taping; Window space factor; Factors affecting window space factor; Relation between emf per turn and transformer rating; Stacking factor.
MAIN DIMENSIONS: Design of window dimensions, yoke dimensions and overall core dimensions; Numerical examples.
DESIGN OF WINDINGS: Design of HVand LV windings (No. of turns and area of cross section); Selection of type of winding.
PERFORMANCE PARAMETERS ESTIMATION: Primary and secondary winding resistance and Leakage reactance calculation; Calculation of no load current, losses and temperature rise of transformer; Design of tank with tubes; Calculation of dimension of tank; Numerical examples. Variation of output and losses in transformer with linear dimensions
Ch. 3 DESIGN OF DC MACHINES:
Introduction; Output equation; MMF calculation; Selection of number of poles; Design of core length and armature diameter; Carter’s fringing curves and its significance; Design of length of air gap; Numerical examples.
ARMATURE DESIGN: Choice of armature winding; Armature conductor; Number of armature slots; Slot dimensions; Slot loading; Design of armature core; Numerical examples.
Also refer GTU question papers of sub. code:170902 dated: 7/12/15, 8/5/15, 2/12/14 etc.
Prof. K.S.Shah
Specific electric loading and Specific magnetic loading; Output coefficient; Output equations for transformers and rotating machines; Factors affecting size of machines; Criteria for selection of specific loadings; Heating and Cooling of Transformers and rotating machines.
Ch 2 DESIGN OF THREE PHASE TRANSFORMER:
Types of transformers; Position of HV and LV windings and its importance; Relation between core and yoke cross section area and its significance; Different types of transformer windings; Different positions of taping; Window space factor; Factors affecting window space factor; Relation between emf per turn and transformer rating; Stacking factor.
MAIN DIMENSIONS: Design of window dimensions, yoke dimensions and overall core dimensions; Numerical examples.
DESIGN OF WINDINGS: Design of HVand LV windings (No. of turns and area of cross section); Selection of type of winding.
PERFORMANCE PARAMETERS ESTIMATION: Primary and secondary winding resistance and Leakage reactance calculation; Calculation of no load current, losses and temperature rise of transformer; Design of tank with tubes; Calculation of dimension of tank; Numerical examples. Variation of output and losses in transformer with linear dimensions
Ch. 3 DESIGN OF DC MACHINES:
Introduction; Output equation; MMF calculation; Selection of number of poles; Design of core length and armature diameter; Carter’s fringing curves and its significance; Design of length of air gap; Numerical examples.
ARMATURE DESIGN: Choice of armature winding; Armature conductor; Number of armature slots; Slot dimensions; Slot loading; Design of armature core; Numerical examples.
Also refer GTU question papers of sub. code:170902 dated: 7/12/15, 8/5/15, 2/12/14 etc.
Prof. K.S.Shah
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