I need the answer as soon as possible Discussion: 1. State the principleof operation for a three - phaseinduction machine based onrotating magnetic field theory? 2.Is it possible that the rotor speedof an induction machine equalsthee speed of rotating magneticfield? Why?

1) Operation principle of three phase induction machine : Consists of two part : stator and rotor…

Answered: Discussion: 1. State the principle of…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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What are the two parameters which are considered in piezo actuators? Why contracting actuators are also called bending actuators? Which property of magnetic material and effects are used in magneto-strictive actuators, Explain in detail with suitable application in industrial scenario?
Q4. Draw the equivalent circuit diagram of self-excited DC shunt generator and explain thefollowing:(i) Using a diagram explain how the generator develops its initial emf and how theinduced voltage reaches up to its operating point?(ii) How you can obtain the magnetization curve for such machine? Explain thesignificance of critical resistance line
The magnetic field produced in the air gap of an induction motor by the stator windings is given by B=Bm cos(ωt−2θ), in which θ is angular displacement in the counterclockwise direction as illustrated in Figure 16.4 on page 797. How many poles does this machine have? Given that the frequency of the source is 50 Hz, determine the speed of rotation of the field. Does the field rotate clockwise or counterclockwise? Repeat for a field given by B=Bm cos(ωt+3θ).
Using developed diagrams of a 2-pole machine rotating counterclockwise, show that :a) Armature reaction in a motor (i)increases the flux density under the pole in the directionopposite to rotation, and (ii)shifts the magnetic neutral axis in the direction opposite to rotation . b) Armature reaction in a generator (i)increases the flux density under the pole in the direction of rotation, and (ii)shifts the magnetic neutral axis in the direction of rotation .
- A separately excited 4 - pole, 900 rpm wave wound dc generator has an induced emf of 240V at rated speed and rated field current. When connected to a load, the terminal voltage is observed to be 200V. If the armature resistance is 0.2 Ω and the flux per pole is 10 m Wb, compute the armature current and the number of conductors
What are the different losses taking place in a DC machine. What techniques are employed to reduce the Iron/Magnetic loss of a DC machine? Briefly state why Iron and Friction losses in a motor take place after Copper loss, whereas in generator we see the opposite order.
Using cross -sectional diagrams of a 4 -pole machine, show the flux distributions resulting from (i)the main field acting alone, (ii)the armature field acting alone, and (iii)the main andarmature fields acting together.
A.Why a three-phase system is mandatory use for factories using heavy loads? B. Explain briefly how the a DC source is being supplied to a wound rotor type induction motor rotor for it to develop its own magnetic field? Note: 1sentence only and straight to the point answer please :)
1.- The production of a force in a conductor carrying current that is inside a magnetic field, is the basis of? 2.- What happens in the flux of a ferromagnetic core of a transformer if the cross section is reduced? : 3.- This force is present internally in the DC motor when the rotor rotates within the magnetic field. 4.- What happens if the field circuit opens in a shunt connected direct current generator?
With the aid of mathematical expressions where necessary, explain the following terms with respect to squirrel cage induction motorsi. Friction and Windage lossesii. Stator Copper lossesiii. Rotor Copper lossesiv. Mechanical Losses
The following sequential statements, when completed, describe armature reaction in a DC generator. Complete each statement by inserting the appropriate word from among those provided in the word list below. Notes: A word may be used more than once. There are more words than required. Word list:armature, between, brushes, clockwise, commutator, currents, direction, distortion, increase, induces, inline, interpoles, main-field, neutral-plane, power, rotating, rotation, slip-rings, slow-down, sparking, speed, torque, voltage. The effects of armature reaction can be reduced by equipping the DC machine with _________________ connected in series with the _______________, or by physically shifting the position of the __________________. If this is not done _______________ will occur at the brushes and the generator output ________________ will be reduced. Prolonged operation in this state can lead to sustained damage to the brushes and _________________.
To ensure a successful voltage buildup, the self-excited dc generator must be started with a shunt field circuit resistance that is _____ A. Higher than the maximum slope of its magnetization curve. B. Lesser than the maximum slope of its magnetization curve. C. Higher than the minimum slope of its magnetization curve. D. Lesser than the minimum slope of its magnetization curve.

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Discussion: 1. State the principle of operation for a three - phase induction machine based on rotating magnetic field theory? 2. Is it possible that the rotor speed of an induction machine equals thee speed of rotating magnetic field? Why?