### EE8401 - Electrical Machines - II - Notes - Unit-5 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**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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