Answered: Find the motor speed, stator current,…

Engineering

Electrical Engineering

Find the motor speed, stator current, output power

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

See similar textbooks

Related questions

Q: : A 4 pole,400 V, Y-connected ,50 Hz, three-phase induction motor has the following per phase…

Q: A 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with rated voltage…

Q: Sll GYYI (EPE 354) l en 15 A 491 V, 60 Hz, four-pole, Y-connected induction motor has the per-phase…

A: Here to find I1 by looking at circuit find equivalent impedance

Q: A 30 induction motor has a 4-pole, Y-connected stator winding. The motor runs on a 50Hz supply with…

A: Three phase induction motor convert the electrical energy to mechanical energy. It consists a rotor…

Q: A 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with rated…

Q: A 125-hp, 480-V, 50-Hz, 6-pole, Y-connected induction motor has the per-phase equivalent circuit…

A: Induction motor125hp,480 v,50 Hz,6-pole,Y-connectedR1=0.15 Ω X1=0.36 ΩR2=0.10 Ω X2=0.36 ΩXM=8.36…

Q: A 3-phase, 415 V, 50 Hz, 4-pole-pair, star-connected induction motor is 90% efficient when operated…

Q: ) In a Crusher application, a 480-V, 60 Hz, 2pole, three phase Induction Motor is drawing 60A at…

A: As mentioned in the question to solve a,b and c. the solution is mentioned below. The given data of…

Q: A 230 V single-phase induction motor has the following parameters: R1 =R2= 11 ohms, X1 = X2 = 14…

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

Q: ·A single phase( 220v),50Hz, 1410 r.p.m, 4-pole induction motor has the following parameters :- {R1=…

A: Given4 pole induction motorNr=1410 rpmf=50 Hzthen slip=(Ns-Nr)Ns Ns=120fp=120×504=1500 rpmthen…

Q: The result of no-load test on a 3-phase Y-connected induction motor are as follows: line to line…

A: According to the question we have to calculate the value of, a. resistance per phase representing…

Q: Q3: A Three-phase, 400 v, 6 Pole, 50 Hz, Star connected Wound Rotor Induction Motor has Z1= (e.4 + j…

Q: Ql: A: A single phase 240 volt 50 hertz capacitor start induction motor has a run winding which…

A: CAPACITOR START MOTOR: It has a cage rotor and its stator has two windings namely, main winding…

Q: Q2: A 110V, 4-pole, 50HZ, single-phase induction motor has a main winding impedance of: Zm=(2+j5) Q;…

A: The given data's are, The voltage is V=110 V, Number of poles P=4, The frequency is f=50 Hz, The…

Q: In order to measure the power taken by a small 220-V 60-Hz single-phase induction motor, it is…

Q: A three-phase induction motor with electrical phase equivalent circuit below is 4 poles and the…

A: For a) Step 1: Calculate slip 1) Calculate synchronous speed Ns=120fP=120×504=1500 rpm 2)Calculate…

Q: A three-phase Y-connected VL=440V, 1440 RPM, 4-pole, 50 Hz, induction motor has the following…

A: Since we only answer up to 3 sub-parts, we’ll answer the first3. Please resubmit the question and…

Q: 1. A 240 V, 50 Hz, single-phase capacitor start a.c. motor is loaded such that the slip is 6%. The…

Q: Question 5 A 3-phase squirrel-cage induction motor is drawing 45 kW from a 440-V, 60 Hz 3-phase line…

A: The input power drawn by the motor has been given as 45kW. The slip is 0.03,the input power to rotor…

Q: A single-phase, , 120 V, 60 Hz, 4-pole, induction motor has the following equivalent circuit…

A: It is given that: E=120Vf=60Hzp=4R1=8.0ΩX1=12.5ΩR2=10.8ΩX2=12.0ΩXm=260ΩNr=1710RPM

Q: A 440 V, 3-phase, 50 Hz, 4-pole, Y-connected induction motor has a fu the rotor has an impedance of…

Q: A 440 V, six poles, 80 hp, 60 Hz, Y connected three phase induction motor develops its full load…

A: Given Parameters of three phase induction motor are given.we need to determine the value of rotor…

Q: A three-phase induction motor with electrical phase equivalent circuit below is 4 poles and the…

A: PART (A) Speed of the motor (N) = 1455 rpm No of Poles = 4 Frequency = 50 Hz Synchronous speed =…

Q: A 3-phase, 2200-V, delta-connected, 12-pole 60-Hz induction motor runs at no load with rated voltage…

A: To derive torque we generally drive air-gap power which is the real power absorbed by the resistance…

Q: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction…

Q: A 460 V, 60 Hz, Star connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the…

Q: A 240 V, 60 Hz, Delta connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the…

A: From the given data Three phase induction motor here given are 240v; freq= 60HZ;870rpm; pole=8;…

Q: A 3-0, 50-Hz induction motor with its rotor star-connected gives 500 V (r.m.s.) at standstill…

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

Q: H.W 1: A 380 V, 60 Hz, Star connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the…

A: A 3 phase Induction motor parameters Stator Resistance R1= 0.07 ohm Rotor resistance R2= 0.05 ohm…

Q: A three phase star connected 400V, 50HZ,4 pole induction motor has the following per phase…

Q: Q2) A single phase( 220v),50HZ, 1410 r.p.m, 4-pole induction motor has the following parameters :-…

A: In the circuit, Single phase 220V, 50Hz, 1410rpm Has all parameters are given. Find the current of…

Q: The power input to a 3 – phase induction motor is 40 kW. The stator losses total 1 kW and the…

Q: A 440V, 60Hz,50hp, 3-phase induction motor is drawing 40A current at 0.8 p.f. lagging. The stator…

A: The stator loss associated with the motor is evaluated as:

Q: Q2: A 110V, 4-pole, 50HZ, single-phase induction motor has a main winding impedance of: Zm=(2+j5) Q;…

A: Ns=120fP.....(Ns is synchronous speed) =120*504 =1500rpmωs=2πNs60 =157.07rad/sec…

Q: Q1: A 3-phase induction motor has an output a 37KW at this load the stator copper loss and rotor…

Q: A 125-hp, 480-V, 50-Hz, 6-pole, Y-connected induction motor has the per-phase equivalent circuit…

A: The given information about a Y-connected three phase induction motor is: Rated shaft output power…

Q: 2) A large 3-phase, 4000 VA (phase to phase), 60 Hz squirrel-cage induction motor draws a current of…

Q: A 3-phase, 115-V induction motor has the following constants: R1 = 0.070 R2'=0.08 N, X1=0.40 and X2'…

A: It is given that: V1=115 VR1=0.07ΩR'2=0.08ΩX1=0.4ΩX'2=0.2Ω

Q: A 3-phase induction motor that is star-connected and has a supply line voltage E0 of 400V at 50Hz.…

A: You have asked multiple independent questions. We are authorized to answer one question at a time.…

Q: A three-phase induction motor with electrical phase equivalent circuit below is 4 poles and the…

Q: A 380 V, 60 Hz, Star connected, 870 r.p.m., Eight poles, Three-Phase Induction Motor has the…

A: A 3 phase induction motor parameters Per phase equivalent circuit parameters R1=0.07 ohm R2=0.05ohm…

Q: A large 3-phase, 4000 Va (phase to phase), 60 Hz squirrel-cage induction motor draws a current of…

A: We are authorized to answer three sub-parts at a time, since you have not mentioned which part you…

Q: A 10 – hp, 4 pole, 25Hz 3-phase induction motor is taking 9100 watts from the line. Core loss is 29…

Q: 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…

A: Dear,as per company guidelines, we can answer only 3 sub-parts at a time, kindly post other sub-part…

Q: A 150 kW, 3000 V, 50 Hz, 6 - pole, star - connected induction motor has a star - connected slip -…

A: A star-connected induction motor has a star-connected slip-ring rotor with a transformation ratio of…

Q: At starting, the windings of a 230 V, 50 Hz, split-phase induction motor have the following…

A: Given, At starting, the winding of a split phase induction motor have the following parameters For…

Q: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction…

A: 2 pole, 3 phase, 50 hz induction motor

Q: 2) A large 3-phase, 4000 Va (phase to phase), 60 Hz squirrel-cage induction motor draws a current of…

A: An AC motor is an electrical machine which takes AC electrical input energy and produces mechanical…

Q: The rotor of a 3-phase, 60 Hz, 4-pole induction motor takes 118 kW at 3 Hz. The motor has stator…

Q: Q1: A 120-V, 1/3-hp 60-Hz, four-pole, split-phase induction motor has the following impedances: R1…

A: As per the guidelines, we supposed to answer the first three-part of the question at a time so…

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

A 3-phase, 6 pole, 440 V, 60 Hz, Y-connected induction motor has the following impedances per phase referred to the stator circuit:

R1=0.43 Ω, R2=0.54 Ω, X1=1.263 Ω, X2=0.608 Ω, XM=43Ω

The total rotational losses are 1100 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2 percent at the rated voltage and rated frequency,

Find the motor speed, stator current, output power

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

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

Induction motors and welding transformers require magnetizing current, which causes a. lagging power factor. b. leading power factor. c. unity power factor. d. zero power factor.
A 3-phase, 46 pole induction motor is connected to 380 V, 60 Hz supply and drawing 54 A at 0.88 PF Lag. The stator copper losses are 1.6 kW, and the rotor copper losses are 930 W. The friction and windage losses are 550 W, the core losses are 1340 W, and the stray losses are negligible. find air-gap power, power converted, output power.
A 460V, 25hp, 60Hz, 4 pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1 = 0.641 Ω R2 = 0.332 Ω X1 = 1.106 Ω X2 = 0.436 Ω Xm = 26.3 Ω The total rotational losses are 1100W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 3.5% at the rated voltage and rated frequency, find the motor’s Speed Stator current Power factor Pconv and Pout Ʈǐnd and Ʈload Efficiency
A 3-phase, induction motor has the following no-load test data: No load (per phase): 120 V, 5 A, 480 W. Determine the magnetizing reactance per phase of the approximate equivalent circuit.
3-Phase 50Hz 6 pole induction motor has rotor resistance of 0.1 ohm and reactance of 0.92. ignore voltage drop in stator and assume thee rotor resistance is constant. Full load slip is 3%, then find Tmax /Tfl
A 400V, 50Hz 30hp three-phase induction motor is drawing current at power factor 0.8 lagging. The stator and rotor copper losses are 1.5kW and 900W respectively. The friction and windage losses are 1050W and the core losses are 1200W . Find the air-gap power of the motor.
Given a three-phase induction motor, 380 V, 2 poles, 60 Hz. At a given time the phase currents are +35.7 A, -6.6 A and -29.2 A, with an axis displacement of 60º. Calculate the components Id and Iq
A 3-phase, 115-volt induction motor has the following constants : R2=0.07 ,X1=0.4 R,'2= 0.08 X'2 = = 0.2, All the values are for one phase only. At which slip the gross power output be maximum and value of gross power output
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.
A 3-phase, 50-Hz induction motor with its rotor star-connected gives 500 V (r.m.s.) at standstill between the slip-rings on open-circuit. Calculate the current and power factor at standstill when the rotor winding is joined to a star-connected external circuit, each phase of which has a resistance of 10 Q and an inductance of 0.04 H. The resistance per phase of the rotor winding is 0.2 N and its inductance is 0.04 H. 4. Also, calculate the current and power factor when the slip-rings are short-circuited and the motor is running with a slip of 5 per cent. Assume the flux to remain constant. Identify it`s given and solve it
A 3-phase induction motor that is star-connected and has a supply line voltage E0 of 400V at 50Hz. An equivalent circuit of one phase of the generator is shown in Figure 1. Assume that the input voltage (E0) phase angle is 00. The known parameters at rated power output are as follows: RFE = 1000 Ω, XM = 400 Ω, R1 = 1.0 Ω, X1 = 8 Ω, ns = 1000 rpm, nr = 950 − N rpm, R2 = 2.0 Ω, Note that the number of stator pole-pairs is 3. b) If the motor’s supply frequency is changed to 60Hz but the input voltage and the rotor speed remain unchanged, calculate: i) the new motor 3-phase output torque T’m3-ph, ii) the new motor power factor pf’. c) In no more than 400 words total: i) explain why synchronous generators are essential for power balancing in an AC power system.
The power input to a 3 – phase induction motor is 40 kW. The stator losses total 1 kW andthe friction and winding losses total 2 kW. If the slip of the motor is 4%, find (a) mechanicalpower output, (b) the rotor Cu loss per phase and (c) the efficiency