All the students are informed to remain present in their respective classroom for mentor meeting at 09/07/2018 at 12:30 PM
Friday 29 June 2018
Wednesday 27 June 2018
Laboratory
Assignments
Semester : 7TH Electrical
Subject: Design of AC Machines (2170909)
Draw & write the following Assignments from the
book “ELECTRICAL MACHINE DESIGN “ by A.
K. Sawhney
SHEET NO. 1
Draw the following parts of three phase induction motor
in SHEETS
|
10.3,10.7,10.10,10.14,10.15,10.16,10.27,10.36,10.41,10.43
|
SHEET NO. 2
Draw
the following parts of three phase synchronous machine in SHEETS
|
12.2,12.3,12.4,12.8,12.9,12.10,12.13,12.14,12.15,12.16,12.17,12.18
|
SHEET NO. 3
Draw the ROTOR
& STATOR of induction machines in sheet as per the dimensions calculated
from the problem no. 1
SHEET NO. 4
Draw the
ROTOR & STATOR of synchronous machines in sheet as per the dimensions
calculated from the problem no. 2
SHEET NO. 5
Draw the circle diagram for 5HP, 200V, 50Hz,
3-ɸ, 4-pole, star connected induction motor from the following data: Also
calculate power factor, F.L. current, % slip, Efficiency, Max. Torque, Max.
Output etc.
|
O.C. Test
|
200V
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5A
|
350W
|
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S.C. Test
|
100V
|
26A
|
1700W
|
Write the following solved examples from
the book “ELECTRICAL MACHINE DESIGN “ by
A. K. Sawhney in file page with data sheet
(1)Design
problem-1
Design a 2.2KW, 400V, 3-ɸ, 50Hz, 1500rpm squirrel cage induction motor.
The machine is to be started with star-delta starter; the efficiency &
power factor are 0.8 & 0.825 respectively. Assume cheap design.
(2)Design
problem-2
Design a water wheel generator with the following specifications:
KVA=3000, Phase=3, Voltage=6600V,
Frequency=50Hz, Connection=star, RPM=187.5,
P.F.=0.8lag
Design problems
NOTE : (1) Solve
the following problems as per solution of
above Design
problem no 1. Given in A. K. Sawhney book
(2)Problem
distribution as per Batch…. Like, A1-1, A2-2, A3-3, A4-4,
A5-5, B1-6, B2-7,
B3-8, B4-9 & B5-10
(1)
Design a 5HP, 440v, 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.
(2)
Design a 30HP, 440V, 50Hz, 1000rpm,3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.45wb/m2,
specific electric loading=25000ac/m, Efficiency=86%, power factor=0.87, stator
winding factor=0.955. Suggest for overall good design.
(3)
Design a 10HP, 440V, 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, stator winding factor=0.955. Choose
the main dimension to give an overall good design.
(4)
Design a 5HP, 440v, 50Hz, 1500rpm, 3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.44wb/m2,
specific electric loading=24000ac/m, Efficiency=83%, power factor=0.84, stator
winding factor=0.955. Suggest for cheap design.
(5)
Design a 15HP, 440V, 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=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.84, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension for good power factor.
(6)
Design a 20HP, 440V, 3-Phase, 6-pole, 50Hz
squirrel cage induction motor which is to be started using a star-delta
starter. Assume:-Average flux density in the gap=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.87, Power factor=0.86, stator winding
factor=0.955. Choose the main dimension for good Efficiency.
(7)
Design a 15HP, 440v, 50Hz, 1500rpm, 3-ф squirrel
cage induction motor. Assume that: specific magnetic loading=0.44wb/m2,
specific electric loading=24000ac/m, Efficiency=83%, power factor=0.84, stator
winding factor=0.955. Suggest for cheap design.
(8)
Design a 10HP, 440V, 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=0.42wb/m2, Ampere conductors
per meter=26000, efficiency=0.84, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension for good power factor.
(9)
Design a 30HP, 440V, 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=0.41wb/m2, Ampere conductors
per meter=23000, efficiency=0.85, Power factor=0.84, stator winding
factor=0.955. Choose the main dimension to give an overall good design
(10)Design a 20HP, 440V,
3-Phase, 6-pole, 50Hz squirrel cage induction motor which is to be started
using a star-delta starter. Assume:-Average flux density in the gap=0.42wb/m2,
Ampere conductors per meter=25000, efficiency=0.88, Power factor=0.86, stator
winding factor=0.955. Choose the main dimension for good Efficiency.
Tuesday 26 June 2018
2130902- ANALOG ELECTRONICS QUESTION BANK (SEMESTER 3)
ANALOG ELECTRONICS : Question Bank
Draw transistor C-E amplifier circuit. Draw its ac equivalent circuit.
|
Obtain h-parameter equivalent circuit of C-E configuration. Discuss merits and demerits of h-parameters.
|
Do the analysis of C-E amplifier circuit and obtain expressions of AV, AI, AVs, AIS, RI, Ro in terms of h-parameters.
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Do the analysis of C-E amplifier circuit with un bypassed RE.
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Do the analysis of C-C amplifier circuit and obtain expressions of AV, AI, AVs, AIS, RI, Ro in terms of h-parameters.
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Explain the need of cascading transistor amplifier. How to select the amplifier for cascaded connection?
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What is power amplifier? Give important features of power amplifier circuit.
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What is transistor load line? Explain how to obtain it. Define Q- point on the load line.
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Compare various transistor amplifier configuration.
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Explain operation of class –B operation using necessary waveforms. Enlist advantages, disadvantages and applications of it.
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Explain operation of class –AB operation using necessary waveforms. Enlist advantages, disadvantages and applications of it.
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Explain working of class B push-pull amplifier circuit with necessary waveforms.
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Explain working of class B complementary –symmetry amplifier circuit with necessary waveforms.
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What is crossover distortion in class B amplifier circuit ? Give causes and remedies for the same.
|
Enlist various biasing configurations for JFET. Explain any one of them in detail.
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Enlist various biasing configurations for MOSFET. Explain any one of them in detail.
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What do you mean by feedback in amplifier circuit? What is positive feedback and What is negative feedback ? Give comparison between them.
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Explain effect of negative feedback on gain, distortion , stability and band width.
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Explain voltage series feedback (series- shunt) feedback with the block diagram.
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Explain voltage shunt feedback (shunt- shunt) feedback with the block diagram.
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Explain current series feedback (series- series) feedback with the block diagram.
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Explain current series feedback (shunt- series) feedback with the block diagram.
|
Solve the numericals from reference books (solved problems).
|
Draw the substractor circuit using Op-Amp
Define Q for filter circuits.
Justify that ideally common mode rejection ratio for op-amp is infinite
Describe in brief : PSSR , CMRR, Slew rate, offset voltage, offset current, bias current.
Draw the Pin diagram of IC-555
Draw the circuit of Op-amp based integrator.
Describe the meaning of Cross Over Distortion occurred in amplifier.
Define the meaning of virtual ground in Op-amp.
|
Find the maximum frequency for a sine wave, output voltage of 10V peak with an op-amp whose slew rate is 1V/µS.
Derive the equation for non inverting amplifier using OP-AMP .
Explain the working of a summing and averaging amplifier when connected in inverting mode.
For inverting amplifier V1= 1V, V2= 3V, V3= 2V with R1=R2=R3= 2K and RF= 3K, Determine the output voltage.
Compare: inverting and non inverting amplifier.
Explain in detail voltage follower with its applications.
Compare: R-C phase shift and wein bridge oscillator.
Design a R-C phase shift oscillator to produce a sinusoidal output at 1KHZ, using capacitor value 0.01 µF.
Write short note on : Integrator.
Explain symmetric Square wave generator using op-amp.
|
Why it is necessary to use an external offset voltage compensating network with practical Opamp circuits?
What is an instrumentation amplifier? List applications of instrumentation amplifier.
Draw the block schematic of a typical operational amplifier and briefly explain the function of each block. Also give the equivalent circuit of the Opamp.
|
Determine the output voltage of an op-amp for input voltages of Vi1 = 150 µV, Vi2 = 140 µV. The amplifier has a differential gain of Ad 4000 and the value of CMRR is: (a) 100. (b) 105 .
|
Explain how an OP-AMP works as an averaging amplifier?
Explain the effect of negative feedback on frequency response in an OP-AMP.
What do you mean by slew rate in an OP-AMP? Also mention about causes of slew rate and explain its significance in applications.
|
Draw and explain OP-AMP as a zero crossing detector. Give suitable example of its practical application.
What are the requirements of Instrumentation amplifier for practical purpose?
Explain the working of a practical integrator circuit with neat sketch.
Also draw output waveforms for sinusoidal and square wave inputs.
Describe how an Op-amp may be used as voltage to current converter. State the application of OP-AMP based Wein bridge oscillator.
Explain circuit diagram of OP- AMP as a Peak detector.
|
Explain voltage to current converter with grounded load.
Draw the circuit op-amp as differentiator and explain with necessary waveforms.
|
NOTICE:2130902- Analog Electronics (Semester 3)
Students of BE III sem Electrical Engg. are informed to prepare power point presentation and working practical model based on below mention topic and present it in front of faculty members and students. The presentation should be of 15 min. max. Submit your presentation to the respective faculty members.
Sr.
|
Topic
|
1
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OPAMP as non-inverting amplifier
|
2
|
OPAMP as adder
|
3
|
OPAMP as scale changer
|
4
|
OPAMP as integrator
|
5
|
OPAMP as differentiator
|
6
|
Phase shift oscillator
|
7
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Regulated power supply (12-0-12) volts.
|
8
|
Schmitt trigger circuit
|
9
|
OPAMP as low pass filter
|
10
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IC 555 as astable multivibrator
|
11
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IC 555 as bistable multivibrator
|
12
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IC 555 as monostable multivibrator
|
13
|
Regulated power supply (15-0-15) volts.
|
14
|
OPAMP as band pass filter
|
15
|
OPAMP as high pass filter
|
16
|
OPAMP characteristics
|
17
|
Zero crossing detector circuit
|
18
|
Square wave generator
|
19
|
Saw-tooth wave generator
|
20
|
Voltage follower circuit
|
Monday 25 June 2018
Friday 22 June 2018
REGISTRATION FOR 3RD SEM GROUP FOR DE-I-A (AY:2018-19) - ONLY FOR ELECTRICAL ENGINEERING DEPARTMENT, GEC, BHARUCH
THIS FORM IS PREPARED FOR 3RD SEM STUDENTS (AY 2018-19) TO MAKE GROUP FOR DESIGN ENGINEERING SUBJECT. STUDENTS HAVE TO INSERT THEIR INFORMATION IN THIS FORM. GROUP SHOULD HAVE MINIMUM 4 STUDENTS AND MAXIMUM 5 STUDENTS OF ELECTRICAL ENGINEERING DEPARTMENT, GEC, BHARUCH.
Wednesday 20 June 2018
Registration for TCS Affirmative Action Program for 5th sem Students
Selection Criteria for TCS Affirmative Action Program for Students
Sem: For Current 5th Semester Batch Only
Selection Criteria SC/ST students adhering to the below conditions:
I. Marks: Consistent academic performance (with scores of 60% and above) in Graduation, Class XII and Class X is required. CGPA - 6.0 for all students.
II. Breaks/ Gap in Education: There should be no break in studies. However, as an exception, a maximum of 2 years of break in studies is permissible on account of valid reasons.
III. One backlog is allowed for students.
IV. : Family income of the applicant should not exceed Rs 3.6 lakh per annum.
Poor meritorious students(Which also includes General/SEBC/ANY OTHER) adhering to the below income criteria (along with conditions mentioned above) are also eligible. Conditions are as stated below.
Income Criteria: Family income of the applicant should not exceed Rs 3.6 lakh per annum.
Candidates will be required to produce any of the below documents for recording the Income Criteria which is a pre- requisite.
a. Income Tax Return document of parents/ parent as applicable. (Wherever the Income Tax. Return of parents is not filed/not available; candidates may produce either of the following documents.)
b. Notarized Undertaking of Annual Income. (Note : amount of the notarized bond is Rs. 20 )
c. Bank Statement of previous 6 months (If Parents have Bank Accounts)
TCS does a preliminary review and finalizes the students in the batches based on the eligibility criteria.
REGISTRATION LINK
Monday 18 June 2018
For Final Year Students regarding project
all the final year students are hereby asked to fill the sheets as attached herewith and the same have to be submitted before 22/6/18.
The final guide is allotted in the same google sheet so kindly go through it and register the same guide in your team registration process.
click here
The final guide is allotted in the same google sheet so kindly go through it and register the same guide in your team registration process.
click here
Friday 15 June 2018
Notice Regarding Check Marks on GTU Portal
All students are informed to check their marks on GTU portal. If any discrepancy contact to subject teacher immediately.
Semester Date for view of Marks
5 & 6 15th June 2018 to 20th June 2018
1 to 4 21st June 2018 to 23rd June 2018
Urgent: Regarding not register students in 100 activity points of batch 2015-16
As we know that our first batch of 100 activity points (batch 2015-16) will be complete their degree in year 2018-19. We found that still few students has not even Register for the same.
As per circular dated 21.07.2015, http://gtu.ac.in/ImpCircular/ Circular_4_100%20Activity_ Points.pdf 100 activity points mandatory to earn B.E. degree at GTU.
Following students have not register themselves for 100 point activity. They are informed to register themselves and submit activity on or before 18/6/2018.
As per circular dated 21.07.2015, http://gtu.ac.in/ImpCircular/ Circular_4_100%20Activity_ Points.pdf 100 activity points mandatory to earn B.E. degree at GTU.
Following students have not register themselves for 100 point activity. They are informed to register themselves and submit activity on or before 18/6/2018.
| 1 | 170140109115 | VASAVA DHAVALKUMAR MOTILAL |
| 2 | 170140109083 | PATRA K JAGDISH K SANTOSH |
| 3 | 170140109055 | PARMAR DEEP RASIKBHAI |
| 4 | 170140109051 | NISHAD DEEPAK RAMNAKSHATRA |
| 5 | 160140109112 | VASAVA HEMANSHUKUMAR CHANDUBHAI |
| 6 | 160140109029 | KACHHELA AKSHAY SURESHBHAI |
| 7 | 150144109001 | BHURIYA VIHAREEKABEN CHIMANLAL |
| 8 | 150140109121 | VARSANI TEJASH JAGDISHBHAI |
| 9 | 150140109090 | PATEL MOHAMMED AAFRIN |
| 10 | 150140109026 | GAMIT PARIMALKUMAR |
Thursday 14 June 2018
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