EE8401 - Electrical Machines - II - Notes - Unit-5 Two marks - EEE 4th Sem

Subject Name: Electrical Machines - II

Subject Code: EE8401

B.E. EEE Dept - semester 04

Anna University Regulation 2017 B.E. EEE Dept 4th semester EE8401(Electrical Machines - II) 2 marks for 5th unit is provided below. EE8401 all units 2 marks, Electrical Machines - II all units notes & syllabus are listed down for students to utilize it for scoring maximum marks with our study materials.

1.Why is single phase induction motor not self starting ?

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2.Where are split-phase motors used ?

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3.List out four applications of single phase induction motor.

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4.Name the starting methods for single phase induction motors.

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5.State the limitations of shaded pole single phase induction motor.

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6.Why are centrifugal switches provided on many 1-phase induction motors ?

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7.What type of single phase induction motor would you use for the following applications : i) Ceiling fan ii) Wet grinder ?

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8.What is the function of capacitor in a single phase induction motor ?

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9.What is the use of shading coil in the shaded pole motor ?

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10.Why capacitor-start induction motors are advantageous ?

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11.List out four applications of shaded pole induction motor ?

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12.What are the drawbacks of the presence of the backward rotating field in a single phase induction motor ?

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13.Explain how to start the single phase induction motor ? or Why single phase induction motor has two windings on its stator ?

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14.How do you size the capacitor rating required for an induction motor.

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15.How to reverse the direction of rotation of a split-phase motor ?

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16.State any two applications of capacitor start induction motor.

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17.Which parameters are obtained from the blocked rotor test of a single phase induction motor ?

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18.Why do induction motor runs at low power factor when lightly loaded ?

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19.What will be the direction of rotation of a shaded pole single phase induction motor ?

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20.How can the direction of a capacitor run motor be reversed ?

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21.How is the direction of rotation of a single phase induction motor reversed ?

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22.Why is the hysteresis motor free from mechanical and magnetic vibrations ?

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23.What type of motor is used in computer drives and wet grinders ?

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24.Give two advantages and two applications of stepper motor.

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25.List some applications of linear induction motors.

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26.What are the specific characteristic features of the repulsion motor ?

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27.Discuss the characteristics of single phase series motor.

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28.What are the demerits of repulsion motor ?

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29.List four applications of reluctance motors.

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30.What is a universal motor ?

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31.List the advantages of reluctance motor.

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32.State the limitations of reluctance motor.

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33.State the advantages of hysteresis motor.

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34.State the applications of hysteresis motor.

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35.State the applications of universal motor or a.c. series motor.

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36.State the various types of repulsion motor.

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37.Define step angle for a stepper motor.

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38.State the various types of stepper motor.

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39.What is sub-synchronous reluctance motor ?

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40.Give any four points of comparison between variable reluctance and permanent magnet stepper motors.

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41.Do stepper motors have internal or external fan ?

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42.Define holding torque and detent torque.

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43.Define synchronous stepping rate.

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44.Define slewing rate.

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45.What is the principle of reluctance motor ?

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46.State any four requirements of servomotors.

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47.Name the two types of rotors used for a.c. servomotors.

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48.What is the principle of operation of a linear induction motor ?

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