MID SEM TEST SYLLABUS

SUBJECT : DESIGN OF DC MACHINES AND TRANSFORMER

SUBJECT CODE : 2160912

SEMESTER : 6^TH

(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.

(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.

(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.

Registration for PLC and Automation Workshop

All the interested 8th sem/6th Sem students are hereby informed to register for the workshop on"PLCand Automation"which is organized at Electrical Department,GEC-Bharuch between 21/3/18 to 23/3/18. First two days of this workshop will be conducted at GEC,Bharuch followed by industry visit on third day(23/3/18) at Tatwamasi Automation, Surat. Workshop is free of any charge and having limited seats of approx. 60.


Register here



Prof. P.K.Shah

Final year student

Those who did not come to college for presentation of project must come on Monday failing which fetch disciplinary action against them.

NOTICE REGARDING 100 POINT ACTIVITY

All the Students are hereby informed to Register/Entry themselves for 100 activity points. Registration is mandatory to all students. If student found not registered, then he/she is not eligible to give the viva for the same. If student is already registered in 100 activity points they have to just login and fill their activity done by them. Kindly refer the below provided link for detailed guidelines for registration/entry of activities for the same.

last date for Registration is 28/02/18

http://gtu.ac.in/uploads/100_P oint_Activity_12022018_479978. pdf

​

Electrical Drives &Control (6th semElectrical)

Question Bank( Electrical Drives &Control)

Unit :1

1) Enlist advantages of electrical drives.

2) State essential part of electrical drives.

3) What are the functions of power modulator?

4) Draw block diagram of electrical drive and explain briefly function of each block.

5) What is electrical drive?

6) Enlist factors to be considered for selection of electrical drive.

Unit :2

1) Explain different types of load on electrical drives.

2) Explain quadrilateral diagram of speed and torque characteristic (four quadrant operation)

3) Write a note on load torque and its classification.

4) Dynamic equation of motor load combination.

5) Determination of moment of inertia of a motor.

6) Write a note on stability of an electrical drive.

7) Write a note on load equalisation.

Unit :3

1) Explain speed torque characteristics of seperately excited D.C. motor.

2) Explain speed torque characteristic of DC shunt motor.

3) Explain speed torque characteristic of DC series motor.

4) Explain speed torque characteristic of PMDC motor.

5) Explain dynamic model of DC motor drive.

6) Explain speed control methods of DC series motor.

7) Explain speed control methods of DC shunt motor.

8) Explain ward leonard method of speed control.

9) Explain the 1-ɸ half wave converter drive for the speed control of separately excited dc motor with waveform.

10) Explain the 1-ɸ full wave converter drive for the speed control of separately excited dc motor with waveform.

11) Explain the 1-ɸ semi converter drive for the speed control of separately excited dc motor with waveform.

12) Explain the 1-ɸ dual converter  drive for the speed control of separately excited dc motor with waveform.

13) Explain the 3-ɸ half wave converter drive for the speed control of separately excited dc motor with waveforms at α=30˚, α=150˚.

14) Explain chopper controlled drive operation modes for the speed control of separately excited dc motor with waveform.

15) Explain principle of regenerative barking and speed control (2^nd quadrant operation) of drive using chopper.

16) Explain working of 2-quadrant operation of drive using chopper.(1^st and 2^nd quadrant operation)

17) Give 3points of comparison between converter fed dc drives and chopper fed dc drives.

18) Explain speed and position control scheme of dc motor using dynamic model of dc motor.

Unit :4

1) Explain speed torque characteristics of induction motor.

2) Explain stator voltage control of induction motor.

3) Explain V/f control of induction motor.

4) Explain the effect of non sinusoidal supply on VSI

5) Explain unipolar and bipolar PWM method for inverter.

6) Explain speed control methods of DC series motor.

7) Explain speed control methods of DC shunt motor.

8) Explain ward leonard method of speed control.

9) Enlist advantages of V/f control.

10) Explain the operating modes of doubly fed induction machine.

11) Explain working of static scherbius drive.

12) Explain closed loop speed control of induction motor using slip control scheme.

13) Explain closed loop speed control of induction motor using current limit control scheme.

14) Explain closed loop speed control of CSI fed induction motor drive.

15) Give 7 points of comparison between CSI and VSI.

Solve numericals based on theory and formulas used in chapter 2,3 and4.

final year students

all the students are hereby asked to remain present for their project presentation on 23/2/18 without fail. Please come with your hardware models, PPT and report of your project.

Students from electrical department who has registered (by 16/02/2018 @10 :30 AM)  in Half Marathon-2018 organised by Bharuch Police on 25-02-2018 are informed to submit following in the college latest by Monday 19-02-2018 to Prof. S.I.Shah in Room No. 4010 by 11 : 30 A.M.

1. Copy of aadhar card
2. A Passport Photograph
3. 125 /- rupees

They need to collect their form for participation in Half Marathon-2018 and after filling completely, submit it along with above listed items.

Prof. S.I.Shah

One day Workshop on G.D and P.I on 20/2/18

One day Workshop on G.D and P.I on 20/2/18

All the Final YEAR and Pre-Final Year students of Electrical are hereby informed to attend the one day workshop  on GD and PIwhich is scheduled at Seminar Room Electrical Department on 20th Feb between 11:00 am to 3:00 PM. Workshop will be very much useful for getting tips on G.D and P.I. Mock G.D and P.I sessions will also be conducted.

Hence all students must take full advantage of it.

Session schedule and details are as follows...

Industrial visit of 8th sem on 19/2/18 at Tushar Transformer

All the Final Year(8TH SEM) Electrical students are hereby informed to remain compulsorily present for the industrial visit at Tushar Transformer. It will be part of your curriculum for the subject Commissioning and Testing of Electrical Equipment.  Attendance is compulsory. Experiment will be performed and you have to note down reading and show at the time of submission.

Address: 
A-1/3, PHASE-1, NARMADA NAGAR, Bharuch
Date of Visit: 19/2/18
Time: 
10.50 a.m TO 1.00 P.M (Batch-A)
1.00 P.M onwards(Batch-B)

DIV-A students shall reach at company premises sharp at 10.50 a.m on 19/2/18. 



Prof. P.K.Shah

Registration link for students of electrical department to take part in Half Marathon organised by Bharuch Police

Dear Students, A Half Marathon is -2018 is organised by Bharuch Police on 25/02/2018. It will start from Dudhdhara Dairy ground.

Interested students should register themselves on the link given below by 10:30 AM on 16/02/2018.


They have to submit Photo copy of I-Card along with their recent photograph to Prof. S.I.Shah by 11:00 AM on 16/02/2018.
Register