EE8301 - Electrical Machines - I - Unit-3 Two marks

Subject Name: Electrical Machines - I

Subject Code: EE8301

B.E. EEE Dept - semester 03

Anna University Regulation 2017 B.E. EEE Dept 3rd semester EE8301(Electrical Machines - I) 2 marks for 3rd unit is provided below. EE8301 all units 2 marks, Electrical Machines - I all units notes & syllabus are listed down for students to utilize it for scoring maximum marks with our study materials.

1.Why the i-λ relationship of a magnetic circuit is almost linear ?

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2.What is a multiply excited magnetic field system ?

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3.Give any four examples for singly excited magnetic systems.

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4.What are the causes for irrecoverable energy loss when the flux in the magnetic circuit undergoes a cycle ?

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5.Give examples for multiply excited magnetic field systems and explain the term multiply excited systems.

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6.Why do all practical energy conversion devices make use of the magnetic field as a coupling medium rather than an electric field ?

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7.Give an example for each of single and multiple excited system.

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8.State the principle of electromechanical energy conversion.

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9.In a magnetic circuit with a small air gap, in which part the maximum energy is stored and why ? (or) Predominant energy storage occurs in the air gap of an electromechanical energy conversion device. Is this statement correct ?

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10.What are the three basic principles for the electromechanical energy conversion ?

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11.What is Magnetic saturation ?

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12.Write the principle of energy conservation.

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13.Give examples for continuous energy conversion equipment and force producing devices.

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14.Define coil span factor or pitch factor.

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15.Define distribution factor or winding factor.

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16.Define the term pole pitch.

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17.Define the term synchronous speed.

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18.What is the function of an exciter ?

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19.What are the advantages when the stator coils are short pitched ?

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20.Write an expression for synchronous speed.

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21.Explain the following terms with respect to rotating electrical machines. a) Pole pitch b) Chording angle

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22.State the necessary conditions for production of steady torque by the interaction of stator and rotor fields in an electric machine.

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23.Define rotating magnetic field.

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24.Explain the concept of electrical degree. Give the relation between electrical angle and mechanical angle.

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25.Define coil span or coil pitch.

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26.What is full pitch and short pitch coils ?

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27.How rotating field can be obtained ?

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28.What is two layer winding ?

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29.State the assumptions made while obtaining m.m.f. space wave.

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30.What is slot angle ? How it is accounted for ?

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31.Why is the efficiency of a three phase induction motor is less than that of a three phase transformer ?

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32.What is meant by mechanical angle ? Explain.

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33.What is meant by SPP ? What is its significance ?

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34.What is meant by distributed winding ?

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35.Write the equation, which relates rotor speed in electrical and mechanical radian/second.

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36.What are the requirements of Excitation system ?

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Important links:-

EE8301 - Electrical Machines - I - Unit-1 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-2 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-3 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-4 Two marks (Click here)
EE8301 - Electrical Machines - I - Unit-5 Two marks (Click here)
EE8301 - Electrical Machines - I - All unit notes (Click here)

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