he maximumAns[0.072; 37.5%]Q15/A 4-pole, 3-phase, 50 Hz induction motor has a rotor resistance of 0.022 per phase and standstillleakage reactance is 0.12 per phase. Determine the speed to give maximum torque. What externalresistance per phase is necessary in the rotor circuit to give half maximum torque at starting?Ans[800 r.p.m; 0.072]

Answered: ur aximum Ans[0.072; 37.5%] istance of…

ur aximum Ans[0.072; 37.5%] istance of 0.020 per phase and standstill to give maximum torque. What external e half maximum torque at starting? Ans[800 r.p.m; 0.072]

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: 4. Using the Circuit below, determine the following: 1. The Power taken by the 3 ohm resistor 2. The…

Q: 726 PART 3 Advanced Circuit Analyses I 4 Answer: f(t) =:- f() A cos nt, n = 2k - 1. -2 4 t Figure…

Q: What is the differences between real circuits and the simulated ones, please elaborate.

A: Simulation is define as the mathematical model or representation of a device which gives a very…

Q: Question 4 Draw the following function using only NAND gate F(A,B,C) = A+(C+B') %3D

Q: Given a combinational logic circuit whose input is a four-bit number and whose output is the 2's…

A: Consider the given combinational circuit, Let the 4-bit inputs are A,B,C, and D, with A as MSB and…

Q: Q1. Verify Associative property of convolution for the given input and Impulse responses (using…

A: The solution is given below This is a basic problem of convolution integral of signal and systems

Q: a) What is the minimum required transformer rating in kVA? b) By what percentage could the required…

Q: Questions Q1) what is meant by Insolation, ARC in solar systems?

Q: Consider the circuit shown: Obtain the AC and DC circuit analysis for the collector voltage.

Q: -than time constant of prime mover system. D. much greater 1. Time constant of excitation system is…

A: As per the guidelines given to us we can only provide the solution of three subpart in multi part…

Q: Design a combinational logic circuit whose input is a four-bit number and whose output is the 2's…

Q: 1on 182 A2 A AL Ith

A: Any electrical circuit comprises of resistors, inductors and capacitors. A source, either voltage or…

Q: 6. R, =2 %3D R, = 100 N R2 = 100 2 %3D %3D R3 =100 Q %3D R5 = 20 2 R4 = 50 %3D Rs = 10 2

A: In this question, We need to calculate the total equivalent resistance RT We know if two…

Q: 1) What does tdi and ta2 represent in Pulse signal transmission lines experiment? What is the…

A: It is asked the names of td1 and td2 in pulse signal transmission lines experiment. Also we need to…

Q: A certain op-amp has a CMRR of 250,000. Convert this to decibels 100 dB O 205 dB O 108 dB O 110 dB O

Q: - Use superposition to obtain vx

Q: Determine the efficiency of a 1,500 kVA, 2,200 V 3-phase, Y-connected alternator, which operates at…

A: It is given that: KVA=1500V=2200 VRa=0.078ΩIf=70 AVexcit=130…

Q: Please show your clean and compl

Q: Find I in the network using NORTON'S THEOREM.

Q: For the fixed-bias configuration of Figure 3: a. Sketch the transfer characteristics of the device.…

Q: nd /in the network using Norton's Theorem. 12 2.5IA -j22 20/30°v IA j42 ll

Q: (a) The electric flux density is given as D= 6yax + 2xa,+ 14xya, mC/m2. Determine the electric flux…

Q: Apply node analysis to obtain V1 in the following circuit.

Q: f(t) A A T -T -A Determine the Fourier series of the function in Fig. 16.12(a). Take A = 1 and T =…

A: Trigonometric Fourier series :

Q: P5.46. Find the phasors for the voltage and the cur- rents of the circuit shown in Figure P5.46.…

A: In this question, We need to determine the phasor voltage and current as shown in the circuit.…

Q: A certain amplifier has an open-loop midrange gain of 150,000 and an open- loop 3 dB bandwidth of…

A: In this question certain amplifier given with open loop gain and bandwidth...We have to find out…

Q: The operation of lamp-ballast circuit

A: Ballast are basically devices that controls the initial voltage and the operating current in a…

Q: 39 42 sin 8t V /00

Q: Estimate and sketch the output signal, Vout showing its proper relationship to the input signal, Vin…

Q: Calculate the percent voltage regulation for a three-phase wye-connected 2500 kVA 6600-V…

A: In this question we need to find a voltage regulation of the given alternator.

Q: It gives the magnitude of electric force of two objects exert on each other a. Electric field b.…

A: This question belongs to electro magnetic field theory . It is based on the definition of coulomb's…

Q: 4=0.06 H R2 =7 B $1= 3020° Amperes A Y S, = 220 20° Volts %3D USE MESH ANALYSIS to 8=R13 $, 15=R3 I3…

Q: A synchronous generator.connected to 1.0 per unit voltage infinite bus has 0.8 per unit reactance.…

Q: For the circuit shown below, complete the timing diagram: Data Qa Clock Clock cik Data Qb Qa o- Clk…

Q: 5. Design a circuit using two op amps, to perform the following operation: vo = vị + v2 – 2v3 Now,…

A: We need to design the circuit for given output

Q: 10. A capacitor has 12 V across it with 3 mA of current. How much is the Xc ( in rectangular form )?…

Q: Q5. The one-line diagram of a three-phase power system is shown in Figure 1. Select a common base of…

A: For a three phase power system, the one-line diagram is shown below, Common base on the generator…

Q: Three resistors A,B and C are connected in parallel. The resistance of A is 12 ohms , and that of B…

A: Combine resistor A and B as a single resistance

Q: Defines an address from which the program is stored in microcontroller memory

Q: 10. Calculate the value of Rp that will provide an I D(on) of 10 mA for each of the following values…

A: In this question, We need to determine the resistance RD if drain current ID = 10mA VDD is given.…

Q: 2) A 2 µC point charge is located at A(4, 3, 5) in free space. Find the components E, , Es , and E,…

Q: 3. Calculate the X, ( in rectangular form ) of a 25 µH coil at 10 KHz. Answer : XI =

Q: Q5. An LTI system is described by the following linear constant coefficient differential equation…

A: The solution is given below

Q: Question 6 Find the values of function f in the below table for the following function F(A,C,B,D) =…

A: In this question, We need to fill the value of function f as shown in the table If function is…

Q: electronics circuit determine the following: - If Q1 is turned on in Figure 4a, what is Vout?…

Q: R1. R3 40 N 12 N E RL R2 10 N 50 V 30 N

Q: 4. Using the Circuit below, determine the following: 1. The Power taken by the 3 ohm resistor 2. The…

Q: the input and output impedances : amplifier configuration in Figure below is Al = 175,000 Zin = 10…

Q: A 3mA meter movement is to be used as on ohmmeter Rm =150 ohm , with supply voltage =5v .Determine…

A: steps: Full-scale current is given (3mA) the supply voltage is also given Find the equivalent…

Q: 1 Find the activity factor at the output of each gate if P at A, B and C are all equal to 1/2. A C O…

A: We are authorized to answer one question at a time since you have not mentioned which one you are…

Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

he maximum
Ans[0.072; 37.5%]
Q15/
A 4-pole, 3-phase, 50 Hz induction motor has a rotor resistance of 0.022 per phase and standstill
leakage reactance is 0.12 per phase. Determine the speed to give maximum torque. What external
resistance per phase is necessary in the rotor circuit to give half maximum torque at starting?
Ans[800 r.p.m; 0.072]

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 3

VIEW

Step by step

Solved in 3 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

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

Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.
If a 4-pole induction motor has a synchro- nous speed of 1500 r.p.m., then, supply fre- quency is (1) 50 Hz 60 Hz (iii) (ii) 25 Hz (iv) none of the above
Why do we need to have brushes in a squirrel-cage rotor type induction motor? (short answer)
13 A three-phase induction motor has a mechanical speed of 720 [rpm] and at full load has a slip of 5%. The number of poles and the frequency of this motor are: 4 poles 50 Hz. 6 poles 50 Hz. 8 poles 50 Hz. 6 poles 60 Hz.
The supply frequency to the stator of an 8-pole induction motor is 50 Hz, and the rotor frequency is 3 Hz. Determine the slip and the rotor speed.
Q3 A 50 Hz split-phase induction motor has a resistance of 50 and an inductive reactance of 200 in the main winding as well as starting winding. Determine the value of resistance and capacitance to be added in series with the starting winding to send the same current in each winding with a phase difference of 90°. Ans[ 14.99 Ω, 127.5μF]
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
5. A 50 Hz,8-pole, 3-phase induction motor delivers an output of 3.1 kW at a slip of 0-02. The losses due to friclion and windage are I00 W. Find the value of gross torque in N-m. [41-58 N-m]
A 3-phase induction motor has a starting torque 100% and a maximum torque of 200% of the full load toque. Find the slip at maximum torque. Answer: 26.8%
L-1). The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current c) both "a" and "b" d) neither "a" nor "b" L-2). The 3-phase wound-rotor induction.........a) motor has a wire wound rotor b) motor's rotor can be connected to an external resistive load by way of slip rings and brushes c) motor requires more maintenance than the 3-phase squirrel-cage induction motor d) all of the above L-3). The 3-phase wound-rotor induction motor's rotor circuit's resistance should be adjusted so it is__________ during starting. a) low b) high c) either "a" or "b" d) neither "a" nor "b" L-4). Will a 3-phase wound-rotor induction motor start with no external circuit connected to its rotor leads? a) yes b) no
2. Describe the Torque-Slip characteristics of a three phase induction motor.
A 3-phase induction motor runs at almost 3000 rpm at no load and 2960 rpm at full load when supplied with power from a 50 Hz, 3-phase supply. What is the corresponding speed of the rotor field with respect to the rotor? Select one: a. 60 revolution per minute b. 30 revolution per minute c. 50 revolution per minute d. 40 revolution per minute