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more in Ohio than Osaka, and. Mercedes ..... which in turn protect the centers
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4th CPC as well as RAIC AND RRC had recommended for some relief in the ......
S.E. / M.G. E.C. Railway, Hazipur (Bihar). 61. Member CEC.
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Researchers have proposed potential therapies for a paralyzing disorder once thought to be untreatable. INFORMATION TECH
Chapter 11. SPACE VECTOR PULSE WIDTH MODULATION. 11.1 Introduction.
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Seventh Semester (Regulation 2004) Electrical and Electronics Engineering SPECLAL ELECTRICAL
EE
(Common to B.E. (Part Time) Sixth Semester Regulation 2005) Maximum : 100 marks
Time : Three hours
om
Answer ALL questions.
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PART A- (10 x 2 = 20 marks)
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What is Vernier motor?
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Write down any two properties of synchronous reluctance motor. What is holding torque in stepping motors?
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w
What is Hybrid motor?
w
List out any four applications of switched reluctance motors? What are the types of power controllers used for switched reluctance motors? What are the types of permanent magnet DC motors? What is permanent magnet DC commutator motor? List out the differences between the PM brushless DC motors and PM synchronous motors. 10.
What is meant by
motor?
PART B
11. (a)
(5 x 16 = 80 marks)
Explain the principle of operation and constructional features of synchronous reluctance motor. Explain the working of Vernier motor with a neat diagram
Explain circle diagram and synchronous reluctance motors.
torque-speed
characteristics
of
Explain the synchronous reactance of PM synchronous reluctance motor in detail. 12.
(a)
Explain the construction and principle of operation of in detail.
stepping motor
(6)
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Write short notes about the drive circuits of stepping motors?
(a)
Draw and explain the characteristics of SR motors in detail.
.an nu
13.
an i
vp o
Explain the principle of operation and constructional features of Hybrid motors in detail.
w
w
Explain the "shaft position sensing7' of SR motor.
w
Explain the constructional features of SR motors in detail. Explain the role of computers in the control of SR motors. 14.
(a)
Derive the Torque and EMF equations of the permanent magnet brushless DC motor. (10) Explain the principle of operation of permanent magnet brushless DC motor.
Explain the modes of operation of power controller for permanent magnet brushless DC motor with a neat diagram.
,
,*-
Explain the principle of operation synchronous motors in detail.
of
permanent
magnet
Derive the EMF and torque equations of permanent magnet synchronous motors.
w
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nu
an i
vp or
ta
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om
Explain the microprocessor based control of permanent magnet synchronous motors with a neat block diagram and List out its advantages.
