Electrical Machines Problems and Solutions - StemEZ.com
subjects home. contents chapter previous next prep find. contents: electrical machines chapter 01: electromagnetism. chapter 02: magnetic circuits. chapter 03 ...
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Title: Problems Solutions Electrical Machines Transformers Author: :00:00+00:01 Subject: Problems Solutions Electrical Machines Transformers
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Hint This problem can be solved by the graphical-cum-iterative technique. Solution The B–H curve as per the data is drawn in Fig. P2. Using the solution of 2(a) as a starting point: B 1 = 0 Æ H 1 = 90; H 1 l 1 = 90 ¥ 1 = 108 B 2 = 0 Æ H 2 = 145; H 2 …
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In the contribution some picked-up problems from the area of electric machines, apparatus, drives and power electronics achieved in the Department of Elec-trical Machines and Devices are presented brie y. The eld-harmonic theory of the induction machine presented in the paper describes more complexly its properties as
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The EMF equation of an alternator is given above. The pitch factor k p and the distribution factor k d can be calculated from the following formulae: α is the slot angle and m is the number of slots per pole per phase. β is the angular distance between a full pitch and short pitch coils. For a full pitch coil, β = 0, and hence k p is 1.
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a. Ground reference on an ungrounded system. b. Converting single phase to two phase. c. Reducing harmonics. d. All of these. Answer Explanation Related Ques. 5) In a single phase, full wave bridge circuit and in three phase, delta full wave bridge circuit, the ripple voltage frequency is always.
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Questions on Electric Motors with answers-. Q1. WHAT IS ELECTRIC MOTORS? ANS. An electric motor is an electrochemical device that converts electrical energy into mechanical energy. Most electric motors operate through the interaction of magnetic field and current carrying conductors to generate force.
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The topics that are covered in this PDF containing Electrical Machines Year GATE Solved Questions are: Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency; Three phase transformers: connections, parallel operation; Auto‐transformer, Electromechanical energy conversion ...
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Both the original problem statement and the problem solution are given for each problem in the book. This structure should make it easier to copy pages from the manual for posting after problems have been assigned. Many of the problems in Chapters 2, 4, 5, and 8 require that a student read one or more values from a magnetization curve.
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A list of top frequently asked Electrical Machines interview questions and answers are given below. 1) What is a single phase Autotransformer? A Single-phase autotransformer is a single winding transformer in which a part of the winding is common to both high-voltage and low-voltage sides. 2) What are the advantages of Autotransformer?
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Important Short Questions and Answers: Electrical machines - Transformer Design features of power and distribution type transformers Output Equations and Main Dimensions- Design of Transformers Window space factor Kw - Design of Transformers Overall dimensions - Design of Transformers Volt / turn equation - Design of Transformers
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Question 1 answer Oct 18, 2019 An permanent magnet machine needs a thermal guarantee from its software analysis, since overheating may destroy its magnetic field. There are videos showing the...
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Step-by-step solution. Step 1 of 6. Draw the circuit diagram with three-phase -connected load. Figure 1: -connected load. Step 2 of 6. For a -connected system, the line to line voltage between any two lines will be the same as the voltage in the corresponding phase. Therefore the relationship between the line voltage and phase voltage in a ...
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Both the original problem statement and the problem solution are given for each problem in the book. This structure should make it easier to copy pages from the manual for posting after problems have been assigned. Many of the problems in Chapters 2, 4, 5, and 8 require that a student read one or more values from a magnetization curve.
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Electrical Machines MCQ Question 3 Detailed Solution Download Solution PDF The speed of the induction motor can be controlled by the following methods: 1) V/f control (or) frequency control 2) Changing the number of stator poles 3) Controlling supply voltage 4) Changing winding resistance by adding rheostat in the stator circuit
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Higher efficiency. 7. In induction motor if the number of rotor slots is equal to the stator slots then. The motor will run smoothly. The motor will mil at zero slip. The noise level will be low. The motor may refuse to start. 8. In squirrel cage …
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Question 8 answers Oct 17, 2014 It is clear that we have forward and backward rotor currents. My question is: Which component has higher amplitude assuming that the rotor is rotating; the forward...
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How will you classify Electrical machines? Electrical machines DRAFT. University. 0 times. 0% average accuracy. 10 minutes ago. rameez_kalil_77703. 0. Save. ... Question 1 . SURVEY . 5 seconds . Q. How will you classify Electrical machines? answer choices . Based on Power supply. Based on construction. Based on Principle. All the above.
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Numerical Problems: Ex. 1 Design the stator frame of a 500 kVA, 6.6 kV, 50 Hz, 3 phase, 12 pole, star connected salient pole alternator, giving the following informations. (i) Internal diameter and gross length of the frame. (ii) Number of stator conductors. (iii) Number of stator slots and conductors per slot.
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4) A junction box that is uncovered. The junction box has lots of wires that are connected to each other. If it is not covered, a person gets a shock from damaged wire too. This is a code violation and the risk is minimal if the wires are not within the reach. Thus it is better to cover it with the screws provided.
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