### EE8401 - Electrical Machines - II - Notes - Unit-2 Two marks - EEE 4th Sem

__Subject Name:__ Electrical Machines - II

__Subject Name:__

__Subject Code:__ EE8401

__Subject Code:__

## 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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