EX-802 (C) · SCADA Systems & Applications/Unsolved PYQ Paper
B SPECIAL MACHINE - MAY 2024 Question Paper
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Unit 57 MarksaExplain the construction and working principle of hybrid stepper motor with neat diagrams.
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Unit 57 MarksbDraw and explain in detail the static and dynamic characteristics of stepper motor.
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Unit 57 MarksaExplain dual voltage driver circuit for two phase on drive of a four phase stepper motor and explain the nature of current build up in dual voltage drive.
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Unit 57 MarksbDraw the cross sectional view of switched reluctance motor and explain the principle of operation. State the advantages of switched reluctance motor.
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Unit 514 MarksA SRM with 6 stator poles and 4 rotor poles has a stator pole arc of 30° and rotor pole arc is 32°. The aligned inductance is 10.7 mH and unaligned inductance is 1.5 mH. Saturation can be neglected. Calculate the instantaneous torque when the rotor is 30° before the aligned position and phase current is 6A. What is the maximum energy conversion for one stroke, if the current is limited to 7A? Determine the average torque corresponding to this energy conversion.
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Unit 57 MarksaDerive an expression for permeance coefficient of PMBLDC motor.
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Unit 57 MarksbState the advantages of BLMP DC motor over conventional DC motor.
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Unit 57 MarksaDiscuss the use of Hall sensors for position sensing in PMBLDC motor with necessary block diagram.
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Unit 57 MarksbWith a neat sketch explain the torque-speed characteristics of AC servomotor.
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Unit 57 MarksaExplain the methods of energy conversion via Electric field with examples of Electrical Machines.
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Unit 52 Marksb-iDiscuss in detail the following: i) B-H relationship
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Unit 52 Marksb-iiDiscuss in detail the following: ii) Leakage flux
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Unit 52 Marksb-iiiDiscuss in detail the following: iii) Fringing
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Unit 51 Marksb-ivDiscuss in detail the following: iv) Stacking factor
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Unit 57 MarksaDerive the EMF equation of Permanent Magnet Synchronous Motor (PMSM).
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Unit 57 MarksbWith necessary phasor diagram and circle diagram, describe the torque speed characteristics of PMSM.
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Unit 5OR Choice7 MarksiWrite a short note on: i) Torque equation of stepper motor.
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Unit 5OR Choice7 MarksiiWrite a short note on: ii) Applications of switched reluctance motors.
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Unit 5OR Choice7 MarksiiiWrite a short note on: iii) Permanent magnet materials used in PMBLDC motors.
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Unit 5OR Choice7 MarksivWrite a short note on: iv) Magnetic reluctance.
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