B.TechSemester 62024-25Special Electrical MachinesBEE061
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Special Electrical Machines (BEE061) - AKTU Question Paper 2024-25

B.Tech · Semester 6 · Free PDF Download

This is the official AKTU Special Electrical Machines Previous Year Question Paper for B.Tech Semester 6, 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 6
Session:2024-25
University:AKTU / UPTU

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Questions Asked in 2024-25

Special Electrical Machines (BEE061) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 02 x 7 = 14
  • a
    Enlist the Applications of DFIG
  • b
    Draw the block diagram of constant power drive. Mark the power flows in it for super-synchronous mode
  • c
    List the types of motors that exhibit detent torque
  • d
    Enlist the methods used for rotor position sensing in SRM
  • e
    Comment on the saliency of Interior and Surface PMSM
  • f
    Enlist the applications of PMAC and PCB Motors
  • g
    Write two applications of Universal motor
Section BAttempt any three of the following: 07 x 3 = 21
  • a
    Explain the operation of Singly Exited Induction Generator i n isolated mode by using its magnetization and torque speed characteristics
  • b
    Define the resolution in a stepper motor. A stepper motor has a step angle of 1.8°. Find (a) resolution, (b) number of steps required for 50 revolu tions and (c) shaft speed in RPM if the stepping frequency is 5000 pulse/sec
  • c
    Explain the operation ofvarious power electronics converters us ed to run a switched reluctance motor
  • d
    Differentiate between the following
  • 1
    Electronic and mechanical commutator
  • 2
    BLDC and Conventional DC Motor
  • e
    Explain the construction and working of 1- phase hysteresis motor. Also Explain the torque speed characteristics
Section CAttempt any one part of the following: 07 x 1 = 07
  • a
    Explain the construction and principle of operation of a lin ear induction motor. Also derive the force expression of LIM
  • b
    Illustrate the construction and working principle of two-pha se servomotor with the help of torque speed characteristics
  • a
    Explain the operation of VRSM based on its all three modes o f operations. Also derive the torque equation of VRSM
  • b
    Develop a control strategy to start and run hybrid stepper m otor(HSM)using a microprocessor. Control Block diagram and Flow chart of the pro cess must bedrawn
  • a
    Explain all the design constraints ofstator pole arc and rot or tooth arc in a switched reluctance motor
  • b
    Draw and explain the following characteristics with referenc e to SRM
  • a
    Currentvs rotorangle curve for all the speeds
  • b
    Torquevs rotor position curves for all the speeds
  • c
    Torque speed characteristics
  • a
    Explain the operation of Six pulse BLDC Motor. A BLDC motor has a no-load speed of 6000 rpm when connected to 120V DC source. Armature resistance is 2.5 ohm. Find the speed when it is supplied with 60 V and developing a torque of 0.5 N-m. The no load current is 1 A
  • b
    Explain the Vector control of P MSM. Draw related block and Phasor diagrams
  • a
    A universal motor takes 1 A from 220 V DC supply while runni ng at 2000 rpm. Find the speed and power factor when it is connected to 230 V, 50 Hz supply drawing the same current. The total resistance and inductance a re 20 ohm and 0.4 H, respectively
  • b
    Explain the construction and working of 1- phase repulsion m otor

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

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