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


Departments

  • Centre for Corporate Education, Training & Consultancy (CCETC)
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  • National Centre for Disability Studies (NCDS)
  • School of Agriculture (SOA)
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  • School of Continuing Education (SOCE)
  • School of Education (SOE)
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  • School of Foreign Languages (SOFL)
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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