B.TechSemester 72024-25Electric DrivesKEE075

Electric Drives (KEE075) - AKTU Question Paper 2024-25

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Electric Drives Previous Year Question Paper for B.Tech Semester 7, academic session 2024-25. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 7

Session:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Electric Drives (KEE075) — extracted question text · 100 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 10 = 20

a
Discuss the different compone nts of electric drive
b
Discuss the role of power elect ronic converters in electric drives
c
Define steady state stability of electric drives
d
Name four types of mechanical loads
e
Explain why electric braking is preferred over mechanical brak ing in certain applications?
f
Define dynamic braking in the context of electric drive
g
Define firing angle and extincti on angle in power electronic converters
h
Explain the relation between the power factor and distortion f actor in power converters. i. Differentiate between VSI and CSI in static frequency control. 5 K 4 j. Explain the fact that voltage control affects the speed of an induction motor?

Section BAttempt any three of the following: 10 x 3 = 30

a
Explain the characteristics of active and passive load
b
Define load equalization. Why is it critical in electric dri ve systems?
c
Explain the concept of plugging in DC motor. What precaution s are necessary to avoid damage during plugging?
d
D i s c u s s h o w t h e f i r i n g a n g l e o f t h e c o n v e r t e r a f f e c t t h e s p eed and torque of the motor
e
Explain the operation of Brush less DC motor drive in detail. 5 K 6

Section CAttempt any one part of the following: 10 x 1 = 10

a
Explain the concept of speed-torque conventions in electric drives
b
Classify load torque based on its nature and provide example s for each type
a
Explain why the inertia of a load affect the dynamics of a m otor-load combination?
b
Describe the process of deter mining motor power rating for s hort-time duty
a
Describe dynamic braking in three-phase induction motor. Wha t additional components are required to implement it?
b
Explain the principle of plugging in three-phase induction m otor. Also discuss its impact on the motor operation?
a
Explain the impact of varying the firing angle of the rectif ier on the performance of a DC series motor
b
Explain the working of a dual converter in motoring and brak ing modes for a separately excited DC motor
a
Differentiate between Volta ge Source Inverter (VSI) and Curr ent Source Inverter (CSI) in the context of induction motor drive
b
Describe the working principle of a static rotor resistance control scheme and its impact on efficiency

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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