EE8401 - Electrical Machines - II - Notes - Unit-2 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 2nd 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.List the inherent disadvantages of synchronous motor ?

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2.When is a synchronous motor said to receive 100 % excitation ?

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3.What is hunting ?

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4.Enlist the advantages of synchronous motor.

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5.Mention four applications of synchronous motor.

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6.What is synchronous condenser ? State its application.

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7.What is meant by torque angle ?

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8.What are the causes of Hunting ?

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9.What is meant by break out torque ?

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10.Define pull-out torque in synchronous motor.

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11.What does synchronous phase modifier mean ?

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12.What are V curves ?

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13.What are the main parts of synchronous motor ?

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14.Mention the need for starters in synchronous motors ?

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15.Mention the advantages of salient pole in synchronous motor.

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16.What are the causes of faulty starting of a synchronous motor ?

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17.Specify the role of damper winding in synchronous motor.

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18.What are the starting methods of synchronous motor ?

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19.What are the different excitations of a synchronous motor ?

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20.State the principle of working of synchronous motor.

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21.Why the synchronous motor is not self starting ?

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22.Explain a general procedure to start a synchronous motor.

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23.Define pull in torque incase of synchronous motor.

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24.State the disadvantages of low power factor.

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25.Why synchronous motor always runs at synchronous speed ? (or) Why does synchronous motor develop torque only at synchronous speed ?

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26.Name the important characteristics of a synchronous motor not found in an induction motor.

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27.State the different methods used to minimise hunting.

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28.What is a phase advancer ?

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29.Why a synchronous motor is a constant speed motor ?

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30.Mention two methods used to prevent hunting.

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31.How can we change the operating speed of synchronous motor ?

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32.A 3-phase synchronous motor driving a constant load torque draws power from infinite bus at leading power factor. How power angle and power factor will change if the excitation is increased ?

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33.What is the need of parallel operation of alternators ?

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34.What are the conditions for parallel operation of alternators ?

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35.State the characteristics of two alternators working in parallel.

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36.List out two advantages of synchronizing lamps used for synchronizing.

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37.Explain what happens when the excitation of synchronous machine connected to an infinite bus is varied, the load torque remains constant.

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38.Specify the condition beyond which the synchronous machine is said to be out of step ?

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39.Write down the conditions to be satisfied for proper synchronization of alternators.

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40.List the factors that affect the load sharing in parallel operating generators.

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41.What is meant by compounding curve in synchronous generator ?

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42.What is the purpose of conducting slip test ?

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43.Define synchronization.

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44.What is synchronizing power of an alternator ?

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45.What is meant by alternator on infinite bus-bars ?

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46.Two reaction theory is applied only to salient pole machines. State the reason.

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47.Distinguish between transient and sub-transient reactances.

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