Q/ A 4-pole, 400V, 3-phase, 50Hz induction motor runs at 1440 r.p.m. at 0.8 p.f. lag and delivers an output of 10.8KW. The stator loss is 1060W and friction, windage etc. losses are 300W. Calculate: (i) Slip. (ii) rotor copper loss. (iii) rotor frequency. (iv) line current.

Q/ A 4-pole, 400V, 3-phase, 50Hz induction motor runs at 1440 r.p.m. at 0.8 p.f. lag and delivers an output of 10.8KW. The stator loss is 1060W and friction, windage etc. losses are 300W. Calculate: (i) Slip. (ii) rotor copper loss. (iii) rotor frequency. (iv) line current.

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...

See similar textbooks

Related questions

Q: TOPIC: AC Machines - Induction Motor A three-phase, 3 KV, P=24, 50Hz, Y-connected slip ring IM…

A: The solution is given

Q: EITY OF GOLOAO DENVER A 1500kW, three-phase Y-connected 2300V, 30-pole, 60HZ synchronous motor has a…

A: Given: Line voltage = 2300 V, Terminal voltage per phase Vϕ=23003=1327.9 V, Synchronous reactance…

Q: Equivalent circuit parameters of 208V, 60Hz, 6-pole star connected three-phase induction motor are…

Q: The total losses of 3-phase induction motor at 4A armature current and 1.142 rotor external…

A: The solution can be achieved as follows.

Q: A "round rotor 3-phase star connected alternator", some parameters of which are given below,…

Q: A 70-MVA, 69.3-kV, three-phase round-rotor synchronous generator has a synchronous reactance of 14…

A: (1) KVL equation to the above system Given rating of the machine is 70MVA power factor 0.87lag…

Q: A 280V, 50 Hz, single phase IM, it has Is = 20 A at 0.85 lagging power factor, Assume the stator…

A: Choose the correct option What is load torque Torque = power/w w= 2πN/60 Slip =( Ns -Nr )/Ns

Q: A 3-phase, 4 pole, 400 V, 50 Hz, squirrel-cage induction motor is operating at a slip of 0.02. The…

A: Given a 3-phase squirrel cage induction motor having, Number of pole, P = 4 Frequency, f = 50 Hz…

Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rated nameplate is; 150-V, 60-Hz,…

A: Let Ns be synchronous speed =120×604=1800 rpm Nr be rotor speed =1790 We will use fallowing formulae…

Q: 3-phase 3730W, 220V, 6-pole and 50 Hz induction motor operates at full load with a slip of 0.025.…

A: Power developed = output power + friction + windage losses and stray load losses. Airgap power =…

Q: A 480V, 60Hz, six-pole, Y connected cage rotor induction motor has the following parameters in ohms…

A: The given details of the question are: 480V, 60 Hz, 6pole R1=0.5Ω, R2=0.45Ω, X1=1.1Ω,…

Q: (. What will be the air gap power (in watts) developed by a 3-phase induction motor, whose ratings…

A: It is given that: Terminal Voltage=Vt=230 (line voltage)Vt(phase)=Vt3=2303=132.79 VOutput…

Q: A 480 volts, 60Hz, 50Hp, three-phase induction motor is drawing 60A at 0.85 power factor lagging.…

A: Motor:- It converts electrical form of the energy into mechanical form of energy. Fans, disk drives,…

Q: AY-connected three-phase induction motor has the following values printed on the nameplate: 230V…

A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…

Q: A 4 pole 3 phase induction motor produces test results outlined in Table Q4c when operating from a…

A: Given P=4 Note : G5 not given , we assume G5 =2 Phase voltage Vph=2G50 V =220 V f=50 Hz INL =1.61…

Q: 3 9: an induction motor with 460V, 18.65 kW, 60HZ, 4-pole, + coupled rotor winding, has the…

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

Q: A 3000V, 24-pole, 50HZ, 3-phase, star-connected induction motor has a slip ring rotor of resistance…

Q: 4-A long shunt compound DC generator delivers a load current of 150A at 230V and has armature,…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost the other question…

Q: A 3-phase, 415 V, 50 Hz induction motor draws 5 times the rated current at rated voltage at…

A: From the question, it is given that Induction motor draws 5 times the rated current at rated…

Q: e-phase 460-hp, 415 V, 4-pole, 50 Hz induction motor is operating at overvoltage of 480 0% of the…

Q: A three-phase Y-connected 230-V (line-to-line) 7.5-kW 60-Hz six-pole induction motor has the…

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

Q: Q2: Find the value of starting capacitance for a 250W, 120V, 50HZ single-phase motor that will place…

Q: 3-phase 3730W, 220V, 6 pole and 50 Hz induction motor operates at full load with a slip of O.025.…

Q: A four pole 100 HP 50 Hz induction motor with an efficiency of 94.2% has equivalent resistance and…

Q: A 460-V, 25-hp, 60-Hz, four pole, Y-connected induction motor has the following impedances in ohms…

A: Note : As per the rules we can answer only 3 sub-parts, please post the remaining sub-parts as the…

Q: A three phase, 50 Hz, 4800V, 6 pole Y-connected synchronous generator connected to an infinite bus…

A: from given electrical power output we will find out the Excitation voltage. From excitation voltage…

Q: The no- load speed of 3=phase, 4-pole, induction motor connected to a 3-phase 50HZ .supply is…

A: Three phase induction motor-When a three-phase stator displaced by 120 degrees (in space of 120…

Q: three-phase 60 Hz induction motor connected to a three-phase bus at rated voltage is operating at a…

A: induction motor speed(Nr) is always near to sycronous speed(Ns). Sycronous speed…

Q: b. The rms voltage of a synchronous motor is given by E = 4.44k fT_¸Volts ph where k, f, Tph and g…

Q: A 6-pole,3-phase squirrel-cage induction motor is connected to a 60Hz supply. At full load, the…

Q: Determine the equivalent circuit of synchronous machines. Then, Determine the phasor diagram for…

Q: A 7.5kW, 415V, 50HZ, 4 pole, star connected induction machine is connected to a 3 phase inverter…

A: Given data: 4 pole, 50 Hz machine Rotor speed = 555 rpm Rotor current = 4 A Rotor inductance = 4.51…

Q: Problem 1 The rotor resistance and reactance of a squirrel-cage induction motor rotor at standstill…

A: (a) Write the expression for the value of the slip of the motor at the start. As rotor speed is…

Q: 4-A long shunt compound DC generator delivers a load current of 150A at 230V and has armature,…

Q: 2. A 480V, 60H2, 8-pole, three-phase Y-connected induction motor has the following equivalent…

Q: (b) The parameters of the equivalent circuit for a three-phase. Y- connected. 22ov, 60HZ. six-pole…

A: In this question, We need to determine the stator input current, power factor, air gap power and…

Q: (a). Determine the load angle, armature current in per unit and the power factor of the alternator.…

A: Here given data is, Pole=9 f=50 Hz Power=15KW Pf= 0.85 leading Xs=2.5 ΩPh =2.5 ΩPh ×3 Ph=7.5 Ω…

Q: See attached.

A: The given points for three-phase induction motor:

Q: Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…

A: Slip=Ns-NrNs. Nr is rotor speed Ns is sycronous speed of rotating magnetic field. Forward slip is…

Q: Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…

A: Slip of Induction motor is sycronous speed-rotor speedsycronous speed Forward branch resistance…

Q: 1. The rotor of a certain 20HP,six-pole, 60Hz induction motor has equivalent resistance and…

A: given EBR=150V Rr=0.1 Ω XBR=0.45 Ω It is asked to solve form d to I sub questions

Q: Q40/A 25 h.p., 6-pole, 50 Hz slip-ring induction motor runs at 960 r.p.m. on full-load with a rotor…

A: The solution is given below

Q: An AC Asynchronous motor has the following parameters; Connected voltage,UN=400V…

Q: The rotor resistance and reactance of a squirrel-cage induction motor rotor at standstill are 0.14…

Q: 8) What is an advantage if the starting Torque of the induction motor is higher than the nominal…

A: a) Torque is basically a force when applied to an object rather than push or pull the object it…

Q: A single-phase, six-pole, capacitor start, 120V/60Hz induction motor, has the following parameters:…

Q: A 480V, 60Hz, six-pole, Y connected cage rotor induction motor has the following parameters in ohms…

A: Since you are asking a question with multiple sub parts we will answer the first three for you From…

Q: Q/ dc shunt generator 4 pole with 500 condcutor , wave running at speed 1000 r.p.m the resistance of…

Q: P.9 – A three-phase induction motor has the following parameters: P. = 20CV (1CV = 736W), Uc, = 380V…

A: Three-phase induction motor A three-phase induction motor converts 3 phase electrical input power to…

Question

Q/ A 4-pole, 400V, 3-phase, 50Hz induction motor runs at 1440 r.p.m. at 0.8 p.f. lag and delivers an output of 10.8KW. The stator loss is 1060W and friction, windage etc. losses are 300W. Calculate:
(i) Slip.
(ii) rotor copper loss.
(iii) rotor frequency.
(iv) line current.

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 with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

The full load slip of a 4-pole, 60Hz, 440V (line-to-line) three phase induction motor is 0.05. (i). What is the speed of the rotating stating? What is the frequency (in Hz) of the rotor current? (ii). When the output power of the motor is 90 hp at a speed of 1732 rmp, rotational losses (which include frictional and core losses) are 10,100W, while copper losses for both the rotor and stator total 3700W. Determine the motor efficiency and line current, assuming the motor has a 0.8pf lagging under the conditions.
The full-load slip of 4-pole,60Hz,440v (line -to-line) three phase induction motor is 0.05. i.What is the speed of the rotating stator field?What is the frequencey (in Hz) of the rotor current. ii.When the output power of the motor is 90 hp at a speed of 1732rpm,rotational losses(which includes frictional and core losses) are 10,100W,while copper losses for both rotor and stator total 3700W.Determine the motor efficiency and line current,assuming the motor has a 0.8 pf lagging under these conditions.
A three phase, 4 pole, 3300 V, 50 Hz, star connected Induction motor, has identical primary and referred secondary impedance of value 3+j9 Ohm per phase. Using the approximate circuit, calculate: A. The full load torque at rated slip of 5%. B. The maximum torque at normal voltage and frequency.
Q2. For a 10 kW, 380V, three-phase, four-pole, 1200 r/min, delta-connected induction motor. Adopt a specific magnetic loading of 0.4712 Wb/m2 and a specific electric loading of 23000 ampere-conductors per metre. The motor has a full-load efficiency of 85% and a full-load power factor of 0.8. A square pole design may be assumed and the stator leakage impedance voltage drop may be ignored. Assume also that the winding is full-pitched and uniformly wound. To calculate the following design parameters (a) The approximate outer diameter and length of the rotor core (b) the air gap length of the motor (c) the turns per phase (d) the number of conductors per slot, if 3 slots per pole per phase are chosen
Three-phase induction motor, 460 V 50 Hz, 4 poles, 50 hp with Delta, operating at 3.8% slip rated torque when receives Line Voltage 460 V, 50 Hz The parameters of the equivalent circuit per phase are as follows.R1 = 0.33, X1 = X2 = 0.42 and Xm = 30 Ohm / phase.Answer the following questions by neglecting the mechanical losses, Core losses and Stray load losses.A) Value of the rotor resistance R2 B) Maximum torque and rated speed C) line current and starting torque of motor
TOPIC: AC Machines - Induction Motor A three-phase, 3 KV, P=24, 50Hz, Y-connected slip ring IM has a rotor resistance of 0.015 ohm and a stand still reactance of 0.265 ohm per phase. Full load torque Is obtained al a speed of 245 rpm. Neglect stator impedance, Calculate (A) Ratio of Maximum Torque to Full load Torque (B) Speed at Maximum Torque
A three - phase, 460V, 60HZ, 4 - pole Y - connected induction motor has the following equivalent circuit parameters: Rs = 0.420, R = 0.230, X, = X =0.820, and Xm = 220. The no - load loss Pioss = 60W, assumed as a constant. The rotor speed is 1750 rpm. Determine (i) the synchronous speed, (ii) the slip, (ii) the gap power, (iv) the developed power, and (v) the efficiency
A 400V, 50Hz, 6-pole 3-phase asynchronous motor rotates 20Nm of constant load torque at 950rpm. If it is desired to rotate this load at 750 rpm mechanical speed;a) The synchronous speed of the motor,b) Supply frequency,c) Find the value of the supply voltage between phases?Note: The motor will be driven with V/F sbt because the load torque does not change.
A 220 V, single-phase induction motor gave the following test results:Blocked-rotor test: 120 V, 9.6 A, 460 WNo-load test: 220 V, 4.6 A, 125 WThe stator winding resistance is 1.5 Ω, and during the blocked-rotor test, the starting winding is open. Determine the equivalent circuit parameters. Also, find the core, friction and windage losses.
A gas turbine, 2-pole, 3? synchronous generator rated at 200 MW is connected to the grid (presumed to be an infinite bus). The electrical operating frequency of the grid is 60 Hz, and the slope of the frequency-power curve for the generator is 15 MW/Hz. a. If the no-load setpoint for the generator is set to 63.5 Hz, how much active power will the generator provide to the grid? b. Neglecting system losses, what is the torque provided by the gas turbine? c. What would happen if the no-load setpoint for the generator is set to 59 Hz?
The rotor resistance and reactance of a squirrel-cage induction motor rotor atstandstill are 0.14 ohm per phase and 0.8 ohm per phase respectively. Assuminga transformer ratio of unity, from the eight-pole stator having a phase voltage of254 at 60 Hz to the rotor secondary, calculate the followingA. rotor starting current per phase.B. the value of slip producing maximum torque.
A 20KW, 440V, short shunt compound dc generator has full load efficiency of 87%. If the resistance of the armature and interpoles is 0.4ohm and that of the series and shunt fields 0.25ohm and 240ohms respectively, calculate the combined bearing friction, windage and core loss of the machine A 10 kW 250 volts self-excited generator, when delivering rated load, has an armature-circuit voltage drop of 5% of the terminal voltage and a shunt field current equal to 5% of the rated load current. The resistance of the armature is 0.02 ohm. Calculate the voltage generated and power output.