Exam Details
| Subject | Electro-Mechanical Energy Conversion-Iii | |
| Paper | ||
| Exam / Course | B.Tech. VIEP- Electrical Engineering III (BTCSVI/BTECVI/BTELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 3 (BIEE..016I
B.Tech.-VIEP -ELECTRICAL ENGINEERINQ
(BTELVI)
Term-End. Examination
December, 2016
0075...5
BIEE-016 ELECTRO-MECHANICAL ENERGY CONVERSION .... III .
Time hours Maximum Marks 70
Note: Attempt any seven questions. Use of scientific calculator is allowed. Each question carries equal marks.
1. Deduce Park's transformation relating the 3-phase currents of a synchronous machine to its corresponding d-q axis currents. Express 3-phase currents in terms of d-q axis currents and its inverse. 10
2. Explain how a rotating commutator winding can be represented by a pseudo stationary coil on the moving element. Enumerate the properties possessed by this coil. 10
3. In an interconnection of two dc series machines, one dc series motor of total resistance of 0.5 ohm runs at a speed of 800 rpm when taking 60 A from 500 V dc mains. Another identical series motor is mechanically coupled, but connected in series with the first motor. If the set runs at 400 rpm with load torque equal to 2.5 times the original torque, find the current drawn from the dc mains. 10
4. Obtain the transfer function of a separately excited dc generator for its(i) no load, and on-load operation. 10
5. During the balanced 3-phase short circuit analysis of synchronous machine, explain why the induced field current and increased armature current decay with the same time constant. Also explain the involvement of d-axis parameter. 10
6. Derive the expression for terminal voltage of a synchronous generator in case of sudden reactive loading and unloading. 10
7. Draw the generalized mathematical model of a 3-phase induction machine. Write down the voltage equations in matrix form and obtain the equivalent circuit. 10
8. Enumerate the merits and demerits of an ac servomotor. 5
How can the direction of rotation of a two-phase servomotor be reversed? 5
9. Write short notes on any two of the following: 2x5=10 Single Phase Series Motor Stepper Motor Operation of Induction Motor on Unbalanced Supply Voltage
B.Tech.-VIEP -ELECTRICAL ENGINEERINQ
(BTELVI)
Term-End. Examination
December, 2016
0075...5
BIEE-016 ELECTRO-MECHANICAL ENERGY CONVERSION .... III .
Time hours Maximum Marks 70
Note: Attempt any seven questions. Use of scientific calculator is allowed. Each question carries equal marks.
1. Deduce Park's transformation relating the 3-phase currents of a synchronous machine to its corresponding d-q axis currents. Express 3-phase currents in terms of d-q axis currents and its inverse. 10
2. Explain how a rotating commutator winding can be represented by a pseudo stationary coil on the moving element. Enumerate the properties possessed by this coil. 10
3. In an interconnection of two dc series machines, one dc series motor of total resistance of 0.5 ohm runs at a speed of 800 rpm when taking 60 A from 500 V dc mains. Another identical series motor is mechanically coupled, but connected in series with the first motor. If the set runs at 400 rpm with load torque equal to 2.5 times the original torque, find the current drawn from the dc mains. 10
4. Obtain the transfer function of a separately excited dc generator for its(i) no load, and on-load operation. 10
5. During the balanced 3-phase short circuit analysis of synchronous machine, explain why the induced field current and increased armature current decay with the same time constant. Also explain the involvement of d-axis parameter. 10
6. Derive the expression for terminal voltage of a synchronous generator in case of sudden reactive loading and unloading. 10
7. Draw the generalized mathematical model of a 3-phase induction machine. Write down the voltage equations in matrix form and obtain the equivalent circuit. 10
8. Enumerate the merits and demerits of an ac servomotor. 5
How can the direction of rotation of a two-phase servomotor be reversed? 5
9. Write short notes on any two of the following: 2x5=10 Single Phase Series Motor Stepper Motor Operation of Induction Motor on Unbalanced Supply Voltage
Other Question Papers
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Subjects
- Active Filter Design
- Advanced Control System
- Advanced Power Electronics
- Applied Electromagnetics
- Basics Of Electrical Engineering
- Computer Process Control
- Control System
- Digital Electronics
- Electric Energy Utilization
- Electrical And Electronics Engineering Materials
- Electrical Instrumentation
- Electrical Machine - I
- Electrical Machines - Ii
- Electrical Machines And Electronics
- Electrical Measurements And Measuring Instruments
- Electro Mechanical Energy Conversion - I
- Electro-Mechanical Energy Conversion - Ii
- Electro-Mechanical Energy Conversion-Iii
- Electromagnetic Theory
- Energy Auditing And Analysis
- High Voltage Engineering
- Industrial Drives
- Micro Controllers
- Microprocessor And Applications
- Network Theory
- Power Quality Issues And Remedial Measures
- Power System
- Power System - I
- Stochastic Control Systems
- Switchgear And Protection