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, 2015 | |
| City, State | new delhi, |
Question Paper
1. Draw the phasor diagram of a loaded alternator for the following conditions:
Lagging power factor
Leading power factor
Unity power factor
2. Explain the terms direct-axis synchronous reactance and quadrature-axis synchronous reactance of a salient pole alternator. Describe the 'slip test' for the measurement of these parameters.
Define slip. Why cannot an induction motor run at synchronous speed?
A 4-pole, 3-phase induction motor operates from a supply whose frequency is 50 Hz. Calculate:
the speed at which the magnetic field of the stator is rotating
the speed of the rotor for slip of 0.04
the frequency of the rotor currents when the slip is 0.03.
4. Derive the expression for starting torque of an induction motor. Also derive the condition for maximum torque.
5. Explain the construction and working of a 3-phase synchronous motor. What are the different methods of starting?
6. What are the various phase splitting techniques for starting of single phase induction motor Explain any two methods.
7. Describe the principle of operation of a stepper motor. What are the constructional differences between variable reluctance and permanent magnet stepper motor?
8. Explain the steps to draw the circle diagram of a 3-phase induction motor using the data obtained from no-load test, short circuit test and stator resistance.
9. What are the functions of starter in a 3-phase induction Describe the construction and operation of star-delta starter for 3-phase induction motor.
10. Write short notes on any two of the following:
V-curves of Synchronous Machines
Brushless DC Motor
Repulsion Motor
Lagging power factor
Leading power factor
Unity power factor
2. Explain the terms direct-axis synchronous reactance and quadrature-axis synchronous reactance of a salient pole alternator. Describe the 'slip test' for the measurement of these parameters.
Define slip. Why cannot an induction motor run at synchronous speed?
A 4-pole, 3-phase induction motor operates from a supply whose frequency is 50 Hz. Calculate:
the speed at which the magnetic field of the stator is rotating
the speed of the rotor for slip of 0.04
the frequency of the rotor currents when the slip is 0.03.
4. Derive the expression for starting torque of an induction motor. Also derive the condition for maximum torque.
5. Explain the construction and working of a 3-phase synchronous motor. What are the different methods of starting?
6. What are the various phase splitting techniques for starting of single phase induction motor Explain any two methods.
7. Describe the principle of operation of a stepper motor. What are the constructional differences between variable reluctance and permanent magnet stepper motor?
8. Explain the steps to draw the circle diagram of a 3-phase induction motor using the data obtained from no-load test, short circuit test and stator resistance.
9. What are the functions of starter in a 3-phase induction Describe the construction and operation of star-delta starter for 3-phase induction motor.
10. Write short notes on any two of the following:
V-curves of Synchronous Machines
Brushless DC Motor
Repulsion Motor
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
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