Question No. 27 A 230 V, 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise (forward) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 , then the effective rotor resistance in the backward branch of the equivalent circuit will be

Question No. 27 A 230 V, 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise (forward) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 , then the effective rotor resistance in the backward branch of the equivalent circuit will be

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

See similar textbooks

Related questions

Q: If the armature resistance of a 3-phase, 318.75 kVA, 2

Q: Problem 7 Find the Z-transform of f(n)= (0.5)"rects(n-5)). Be sure to specify the ROC.

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A 30, 460 V, 60 Hz, 20 kW induction machine draws 25 A at a power factor of 0.9 lagging when…

A: Given: In this question, the given details are, A 3φ, VL=460V, 60Hz, 20kW induction machine draws…

Q: 2. Sketch vo and determine the DC voltage available. + 170 V –170 V V 16 Ideal diodes 2.2 ΚΩ + 2.2…

Q: Q1: Three-phase composite conductor transmission line is operated at 60 Hz, each conductor has three…

Q: Let a uniform surface charge density of 5 nC/m2 be present at the z = 0 plane, a uniform line charge…

A: the potential function for a point charge is given by The potential function for an infinite line…

Q: using superposition, solve 6 amps and 5v using mesh analysis in clockwise

A: For finding loop currents apply kvl to each loop linear equations are obtained. Then by solving all…

Q: . Given the circuit diagram as shown below, solve for IT, R₁, R₂, V2, V3, V5, V6, 12, 14, and 15. E…

Q: I need an entire project in electrical circuits especially in mesh analysis please.

A: Mesh Analysis- Mesh analysis is the method of calculating current in the loops which having various…

Q: *13. Using branch-current analysis, find the current through each resistor for the networks of Fig.…

A: The branch current can be calculated by using branch current analysis. The loop equation can be…

Q: a. In an RC circuit supplied with AC power, a 500 ohm resistor is used to create a system with a…

Q: explain the construction & working principle for 5-stage cascaded voltage multiplier circuit for the…

A: Cascaded Voltage Multiplier Circuits for higher voltages are complicated and need for an excessive…

Q: 30 v R₁ ww 100Ω (iii) R₂ www 6892 R3 www 26922 R4 ww 4792 Total resistance RT FIGURE Q2 R5 4792 R6…

A: In this question, We need to determine the equivalent resistance and voltage across the resistances…

Q: The plane wave E(r, t) = 2 x cos(wt + Bx) is incident on a planar interface located at x=0. The…

Q: a) Use nodal analysis to find the value of voltage Vx and current Ix in the circuit of Figure Q2a. 1…

A: As per our company guidelines we are supposed to answer only first question kindly repost the other…

Q: Prove that the voltage is across the capacitor It reaches a value of 63% of the final value at a…

A: Here, a RC circuit with input of step voltage is used as shown in figure below: Due to the series…

Q: An analog voltage in the range 0 to 10.8 V is divided in 16 equal intervals for conversion to 4-bit…

A: Given data, Peak to peak voltage Vp-p=10.8 V. Number of intervals n = 16.

Q: the C(s) eady 20. Given the system of Figure P7.8, design the value of K so that for an input of…

A: We need to find out the value K for given steady state error .

Q: A 36, 460 V, 100 hp, 60 Hz, six-pole induction machine operates at 3% slip (positive) at full load.…

A: Given that In a 3-phase induction machine Power=100hp Voltage=460V frequency(f)=60Hz No.of poles =6…

Q: s)Use your own words to explain the following graph, why time scaling in time domain causes signal…

Q: The short-circuit test is conducted to determine the series equivalent circuit parameters of a 3-…

A: Given: In this question, the given details are, The short circuit test is conducted to determine the…

Q: 1. A single phase, 60Hz, 20-km short transmission line receives 700 MW at 0.95 lagging pf at 327.8…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: 13-While an electron moving in yz- plane, what is the direction of the magnetic field that must be…

Q: Compute the inverse Laplace transform for 1 1 5³ 54 +

Q: G. 1 of 1 cdn.fbsbx.com Three capacitors of 20, 10 and 15 µF respectively are connected in series…

A: In this question we need to find the voltage across 10 microfarad capacitor.

Q: The electric field distribution in the "depleted region" of a semiconductor diode made from a…

A: Given: In this question, the given details are, The electric field distribution in the "depleted…

Q: A 440 V, 50 Hz, 25 hp, 4-pole, Y-connected three-phase wound-rotor induction motor has the following…

A: “Since you have posted multiple questions with multiple sub parts,we will provide the solution only…

Q: A three-phase, 5 hp, 208 V, 60 Hz induction motor runs at 1746 rpmwhen it delivers rated output…

A: Given: In this question, the given details are, A 3-phase, 5 hp, 208 V,60 Hz induction motor runs at…

Q: simplify the block diagram with "block diagram reduction"methods and obtain the G1(s) shown in the…

A: The given block diagram,

Q: Recall the equation of the Z-parameters -- V₁ Z11 Z12 THE A Z21 22 Determine the Z-parameters for…

A: We need to find out the Z parameters for given circuit.

Q: -3 -2 -1 f(t) 0 0 1 2 3 t(s) ∞ ) = ao + E (an cos nwot + bn sin nwot) f (t) = ao + E An cos(n&ot +…

Q: 5.1 A three-phase, 5 hp, 208 V, 60 Hz induction motor runs at 1746 rpm when it delivers rated output…

A: Given: In this question, the given details are, A three-phase, 5 hp , 208 V, 60 Hz induction motor…

Q: Which of the following techniques enables noncoherent detection for AM transmission of real-valued…

A: A signal that takes its value in the set of real numbers at any given time is called a real-valued…

Q: The speed of an alternator rotor in rpm that has 6 poles and is producing a voltage at 57.4 Hertz is

Q: Given the function f(x) = 3x² – 2x on the interval -3 ≤ x ≤3 (a) Find the Fourier series expansion

Q: 1. (-) The switch in the circuit below has been in position a for a long time before it moves to…

A: The given problem is from steady state analysis of circuits. The detailed solution is given in the…

Q: Determine whether the following functions can be the autocorrelation functions of real-valued WSS…

A: We need to check whether the given function are auto correlation function or not.

Q: Using Kirchoff's Voltage Law, find the values of V₁ and V₂. Directions of the three loops are shown.…

A: We need to find out unknown voltage for given circuit by using krichoff's voltage law.

Q: A 100-MVA, 230/115-kV, A-Y three-phase power transformer has a per-unit resis- tance of 0.015 pu and…

A: It is given that: MVA=100V2V1=230115 kVR=0.015 puX=0.06 puRC=100 puXM=20 pu

Q: The DTL gate has: VCE (sat) = 0.1V,, k = 0.9 VBE (FA) = VD (on) = 0.7V, VBE (sat) = 0.8V and BF =…

A: Since, the question posted by you has multiple sub-parts, we will solve the first three sub-parts…

Q: How long does it take electrons to get from a car battery to the starting motor? Assume the current…

A: We need to find out the time for given charge and current .

Q: Q- A single-phase bridge inverter with square wave output voltage will have in it's output waveform…

A: This question is based on the expression of the output voltage of a 1-phase inverter. If Vo be the…

Q: Two complex loads Z1 and Z2 are connected in parallel and powered by a value voltage effective 7.2…

Q: Determine the currents I1 and I2 for the network in Fig 3

A: The required current can be calculated by using the ohm's law and the Kirchhoff's current law to the…

Q: The equivalent circuit per-phase parameters for a 220 V, 50 Hz, three-phase, star-connected, 4-pole,…

A: In this question We need to determine the synchronous speed, rotor speed and efficiency of the…

Q: Referring to the circuit shown, determine: the total resistance RT, the current IT and the current…

A: The required parameters can be calculated by using the parallel resistance reduction techniques and…

Q: Find the minimum sampling frequency for the bandpass signal whose frequency spectrum is given in the…

A: Given: The spectrum of a band pass signal as, To find: i) Minimum sampling frequency above shown…

Q: Why is low-frequency operation the most reliable for TRIACs?

A: TRIAC is a type of thyristor . TRIAC is capable to conduct in both direction.

Q: Find the Norton equivalent circuit for the network external to the elements between a and b for the…

A: Given: A network, To find: Norton's equivalent circuit.

Q: 8.17 In a certain material for which μ = 6.5μ, H = 10a, + 25a, - 40a, A/m find (a) The magnetic…

Concept explainers

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Winding and Construction of the Rotor and Stator

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

3.An induction motor has a rotor resistance and reactance at standstill of 0.1 ohm and 3.5 ohm respectively. At standstill the voltage induced to the rotor is 60volts per phase. If the slip is 5%, determine the rotor current
A three-phase squirrel cage induction machine with rated frequency of f = 50 Hz has a rated slip sn = 0.06. What is the rated speed of the machine in rpm (revolution per minute) if the number of pole-pairs is p = 2? Answer:
An 8 pole, 50 Hz slip ring induction motor runs at a slip of 2.67% on full load. The rotor resistance per phase of the winding is 0.2 ohm. What external resistance per phase must be added in the rotor circuit so that the motor now runs ate a slip of 17.33% such that the torque remains same in both the cases. (Ans: 1.1 ohm)
Which of the following statements about three-phase induction motor is false (A) The speed of rotation of the magnetic field is called the synchronous speed. (B) A three-phase supply connected to the rator produces a rotation magnetic field. (C)The rotating magnetic field has a constant speed and constant magnitude. (D) It is essentially a constant speed type machine.
The other possible methods of starting 3-phase induction motors.
2) the armature windings of a 12-pole DC machine are composed of 72 coils with 10 windings, and the windings are 5the layered wave is yellowish. The Rotor speed is 1000 rpm and the flux value per pole is 25mWb.Resistance of Armature windings, commutation windings and compensation windings is 70mΩ, 10mΩ and5mω. (d) calculate the voltage value induced in the machine. (e) DC machine as a foreign (external) excitation generator with a rated current of 100A at full loadif it is started, what is the terminal voltage value? Calculate. (Enter the formulas that you use for calculations and enter the names of the corresponding parameters.)
1- The compole is used to 2- A 4-pole wave winding machine has ------ magnetic circuit. 3- A commutator pitch for the duplex wave winding is equal to - 4- A 2-pole triplex lap winding will have parallel paths. 5- A 6-pole lap wound generator has 900 conductors. The e.mf induced per one turn being 3V. the generated voltage of the grnerator is ( 6-A 10kW, 250 V shunt generator has armature and field resistance of 0.2 and 502 respectively. Then the generated voltage is and
What are the factors that the induced voltage in three phase induction motor depends upon and Explain how the rotating magnetic field is produced in the three phase induction motor. ii) When the speed difference will be maximum in three phase induction motor. Justify your answer
What is the relationship between slip s) and load (Pa) in an induction motor? Please explain.
Three phase slip ring induction motor gives a reading of 65 V across slip rings when at rest with normal stator voltage applied. The rotor is star connected and has an impedance of (0.8 + j6) ohm per phase. Find the rotor current when the machine is (i) at standstill with the slip rings joined to a star-connected starter with a phase impedance of (4+j3) ohms and (ii) running normally with a 5% slip.
a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction motor operating at 50 Hz. The voltage (E1) across the magnetizing inductance is 210 V, and the slip (s) is 0.05. What is the developed torque produced by the motor ? 0.04 0 j0.22 0 j0.22 0 0.05 V j6.28 NE E1
6- Which of the following supply is given to the rotor winding of 3-Phase Induction Motor: a) DC Supply b) AC Supply c) No Supply d) Pulsating Supply 7- 3-Phase Induction Motor will have Starting Torque and Starting Current a) High, High b) Low, Low. c) High, Low d) Low, High 8- Which of the following method is used for controlling the speed of an induction motor: a) Changing number of stator poles b) Supply voltage control c) Frequency control d) All the options are correct 9- Which of the following method cannot be used for starting of 3-Phase Squirrel Induction Motor: a) Star-Delta Starting b) Line resistor startling c) transformer Starter d) Rotor Resistance Starting 10- The rotor of a stepper motor has no: a) windings b) commutator c) brushes d) all of the above