Exam Details
Subject | Electrical Machines - Ii | |
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 | June, 2016 | |
City, State | new delhi, |
Question Paper
1. Derive the EMF equation for a synchronous motor and explain the meaning of
Distribution factor
Coil span factor
2. Why is a synchronous motor not self-starting What methods are generally used to start synchronous machines? Explain any two with suitable diagrams.
3. Explain the power flow diagram of a three-phase induction motor.
What are the applications of synchronous motors?
A 3-phase synchronous motor of 8000 watt, 1100 V has synchronous reactance of 8 ohm per phase. Find the minimum current and the corresponding induced emf for full load conditions. The efficiency of the machine is 0·8. Neglect armature reactance.
5. Draw and explain the phasor diagram of a salient pole synchronous motor for the following
Lagging power factor
Leading power factor
Unity power factor
6. Explain the procedure of drawing the circle diagram of an induction motor. What information can be drawn from the circle diagram
7. Explain the two-reaction theory as applied to salient pole synchronous machines and draw its phasor diagram for lagging power factor.
8. Describe with constructional diagrams the working of any two of the following:
Direct on-line starter
Slip ring motor starter
Auto transformer starter
9. Explain the principle of operation and constructional details of slip ring and squirrel cage induction motors.
10. Write short notes on any two of the following:
Universal Motor
Permanent Magnet Type Stepper Motor
Brushless DC Motor
Distribution factor
Coil span factor
2. Why is a synchronous motor not self-starting What methods are generally used to start synchronous machines? Explain any two with suitable diagrams.
3. Explain the power flow diagram of a three-phase induction motor.
What are the applications of synchronous motors?
A 3-phase synchronous motor of 8000 watt, 1100 V has synchronous reactance of 8 ohm per phase. Find the minimum current and the corresponding induced emf for full load conditions. The efficiency of the machine is 0·8. Neglect armature reactance.
5. Draw and explain the phasor diagram of a salient pole synchronous motor for the following
Lagging power factor
Leading power factor
Unity power factor
6. Explain the procedure of drawing the circle diagram of an induction motor. What information can be drawn from the circle diagram
7. Explain the two-reaction theory as applied to salient pole synchronous machines and draw its phasor diagram for lagging power factor.
8. Describe with constructional diagrams the working of any two of the following:
Direct on-line starter
Slip ring motor starter
Auto transformer starter
9. Explain the principle of operation and constructional details of slip ring and squirrel cage induction motors.
10. Write short notes on any two of the following:
Universal Motor
Permanent Magnet Type Stepper Motor
Brushless DC Motor
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
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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