Q1) Answer the following: -1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb fluxper pole then la =results in decreasingas shown in2-Hence, beyond certain limit any further decrease intheconsequently, thecharacteristic curvefigure below.BArmature ReactionDropOhmicVoltage DropDInternalCharacteristicExternalCharacteristicLoad Current (I)3-in figure below Armature flux lines is due to theField poles areGNA, MNAAmaturs4-If the DC shunt generator has an induced open circuit voltage of 127 v and thegenerator is delivers current of 342 A, the on load voltage is 120 v and field resistance 15ohm then RaD5- However, even when the field current is zero, some amount of emf is generated(Represented byfact that there exists some residual magnetism in the field poles.in the figure below) this initially induced emf is due to theN.N.N.Increase inspeed (N)Field Current (1,)No-load voltage (E)Generated Voltage (Eg)o Terminal Voltage (V)>No load votage E)

Answered: Image /qna-images/answer/a3ff1445-9519-475e-a0e7-ae58adb8e2d5.jpg

Answered: Q1) Answer the following: - 1- if T=295…

Q1) Answer the following: - 1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb flux per pole then la =

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: Q: A 8-pole lap-wound dc generator is designed to have an average air gap flux density of 0.8 T. The…

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: A 4-pole, wave-wound, 750 rpm shunt generator has field resistances of 0.4 ohm and 200 ohms,…

A: The solution is given below

Q: 1.Show that if three phase currents, each of equal magnitude and differing in phase by 120 degree,…

A: Since you have asked multiple questions in a single request, we will be answering only the 1st…

Q: Q4. An 8-pole DC generator has 400 armature conductors and a useful flux of 0.05 Wb. What will be t…

A: Given data, Number of pole P =4 Number of conductor Z=400 Flux per pole ϕ=0.05 Wb Speed N=1500 rpm…

Q: Calculate the efficiency of a 200-V, 100-kW shunt generator if the resistance of the armature and…

Q: 4.) Determine the value of torque established by the armature of a 4-pole motor having 774…

Q: a) Discuss the three requirements for a generator to generate electricity. b) How many armature…

A: a) A generator is an electromechanical device that converts mechanical energy to electrical energy.…

Q: A 4-pole shunt motor develops 20 lb-ft of torque when the flux per pole is 700,000 maxwells. If the…

A: Given DC shunt motor Torque T=20 lb-ft=27.116 NmFlux per pole ϕ=700000 maxwells=700000×1×10-8…

Q: A 1500 kW, 550 V, 16 pole generator runs at 150 rev. per min. What must be the useful flux if there…

A: Given rating 1500KW, 550V, 16-pole, 150rpm z=2500, lap-connectedcopper losses= 25kw gap density =…

Q: A 4-pole series motor has 800 lap connected armature conductors. At a certain load, the flux per…

A: In this question , we will find line current of motor and speed of motor..

Q: 2- A six-pole, DC shunt generator is wave-connected, supplies a load of A 12 kW, 240 V and an…

Q: A 18 kW shunt generator having an armature circuit resistance of 0.5 ohm and a field resistance of…

Q: Q7 calculate the value of torque established by the armature of a 4-pole motor having conductors,…

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

Q: Q2) A 6 pole, wave wound DC shunt generator has a useful total flux of 420 mWb. The armature winding…

Q: QI/A A 3-phasé, 50 Hz, delta connected generator, its stator winding having 12 slots per pole pair…

Q: 1.5 A 10‐pole, 380 ‐V, 50 Hz, D‐connected three‐phase induction motor is rotating a quarry belt…

A: Since we only answers up to 3 sub-parts, we will answer the first 3. Please resubmit the question…

Q: Example: Determine armature torque and motor speed of 220V, 4-pole series motor with 800 conductors…

A: In this question, We need to determine the speed of the motor and torque T? We know Torque T=…

Q: A 220V series generator has an armature resistance of 0.4ohms. If the generated emf is 230V and the…

Q: 2-A six-pole, DC shunt generator is wave-connected, supplies a load of A 12 kW, 240 V and an induced…

A: Acoording to the given data : p=6 Pload=12000 W V=240 V Eg1=250 V ϕ2=1.2ϕ1 Number of parallel paths…

Q: A three-phase induction motor with the specification in Table Q4(a) is used to drive a conveyor belt…

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

Q: A short shunt compound generator delivers 150 amperes of current at 230 volts. It has armature,…

Q: Example 1: Determine developed torque and shaft torque of 220-V, 4- pole series motor with 800…

A: 1. For finding developed torque the following data is used below from the question: P=Number of…

Q: A 4-pole shunt generated has a lap connected armature with 728 conductors. The flux per pole is 25…

Q: The armature of a 4-pole lap wound dc motor has 850 conductors and draws an armature current of 70A…

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: 4.(dc motor) A 6-pole, simplex wound armature having 720 conductors, rotates in the field of…

Q: Qi (a) With aid of suitable diagram, explain the losses and power-flow of an induction motor.

A: To know how the power flow in the case of an induction machine we need to draw power flow diagram.…

Q: Load Characteristics for DC shunt and series generator is shown below. Explain why curves are like…

Q: Q2: Correct the wrong statement if any: 1-The series filed of a series de generator is excited by…

A: In this question we going to check the wrong statement .

Q: A four-pole shunt motor has an armature with a total of 282 conductors. If each pole face has an…

A: Here given, Z=no.of conductors=282P=no.of poles=4a=pole face area=25 sq.in.Ia=armature…

Q: A 4-pole, 440 V, 900 rpm, simplex wave wound dc motor has a full load armature current of 25 A. The…

A: given simplex wave wound dc motor

Q: (a) A standard 3-phase, 10-pole, squirrel-cage induction motor is rated at 460 V, 50 Hz. We want the…

A: In this question, Find the voltage and frequency if the no load speed No= 300rpm . Rated voltage…

Q: 4-pole DC in series motor, 180 Nm torque. The coil is wavy, at 600 total conductors, and the…

Q: Q1 (a) With aid of suitable diagram, explain the losses and power-flow of an induction motor.

Q: A 4-pole series motor has 800 lap connected armature conductors. At a certain load, the flux per…

A: Given DC series motor with Number of poles P=4Armature conductors Z=800Flux per pole ϕ=60 mWbTotal…

Q: (1) An 16-pole generator has 1000 armature conductors and has a useful flux per pole of 130mWb. What…

A: As per the guidelines of Bartleby we supposed to answer first question only for remaining questions…

Q: A 4-pole series motor has 800 lap connected armature conductors. At a certain load, the flux per…

A: Motor: It is an electromechanical device, that can convert the electrical power into mechanical…

Q: A three-phase induction motor with the specification in Table Q4(a) is used to drive a conveyor belt…

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

Q: re the expression of average torque of an electrostatic motor supplied

A: When the current-carrying current is placed in a magnetic field, force is exerted in it which exerts…

Q: 2. The field circuit of a 200,000 watt, 230-V shunt generator is 6 A when running full load at rated…

Q: QUESTION # 01 The armature winding of a DC motor has 360 conductors, of which only 80% le directly…

A: According to question: a) The total force created by the conductor is calculated as…

Q: motor can have different torque characteristics depending on the resistance of the rotor bars and…

A: It is mentioned motor can have different torque characteristics depending on the resistance of the…

Q: Q2/ An eight poles DC shunt generator supplies a load of 12.5 ohm at 250 V. its armature carries…

A: We need to equivalent circuit and governing equations

Q: Q4 (a) Outline the locked rotor and no load tests for an induction motor and indicate the necessary…

A: Many types of tests are being carried out on a motor. The main purpose of doing these kinds of tests…

Q: Q: A 8-pole lap-wound dc generator is designed to have an average air gap flux density of 0.8 T. The…

A: Given: An 8-pole lap-wound dc generator is designed to have An average air gap flux density: B=0.8 T…

Q: 55. Calculate the voltage induced in the armature winding of a 4-pole, lap wound, dc machine having…

Q: Provide a brief explanation for each of the following questions. Your answers should be concise and…

A: a) The windings and the commutator of the dc machine are usually made from copper due to the…

Q: Q:A8 pole long shunt DC compound generator ruining at 1200 r.pm. supplies a load of 0.255 KA at 230…

A: Shunt DC generator , Pole p=8 Speed N=1200 r.p.m Load 0.255 KA at 230V total flux φ=0.288 Wb

Concept explainers

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.

Question

Q1) Answer the following: -
1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb flux
per pole then la =
results in decreasing
as shown in
2-Hence, beyond certain limit any further decrease in
the
consequently, the
characteristic curve
figure below.
B
Armature Reaction
Drop
Ohmic
Voltage Drop
D
Internal
Characteristic
External
Characteristic
Load Current (I)
3-in figure below Armature flux lines is due to the
Field poles are
GNA, MNA
Amaturs
4-If the DC shunt generator has an induced open circuit voltage of 127 v and the
generator is delivers current of 342 A, the on load voltage is 120 v and field resistance 15
ohm then RaD
5- However, even when the field current is zero, some amount of emf is generated
(Represented by
fact that there exists some residual magnetism in the field poles.
in the figure below) this initially induced emf is due to the
N.
N.
N.
Increase in
speed (N)
Field Current (1,)
No-load voltage (E)
Generated Voltage (Eg)
o Terminal Voltage (V)>
No load votage E)

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

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
A 230V shunt motor has an armature resistance of 0.28Ω and a field resistance of 115Ω. At no-load, the line current is 8A and the speed is 2300rpm. What is the speed when the line current is 52A? Assume brush drops of 1V at no-load and 3V at load condition and constant flux density. 2154rpm 2212rpm 2178rpm 2155rpm
a 220v dc shunt motor takes 5a and 40a at no load and full load respectively it has an armature resistance of 0.2 ohm and field resistance of 110 ohm respectively. iron,friction and windages losses are negligible.then using among parameters find following. the ratio of emf at no load to full load
3-phase, 50 Hz, 4-pole, 220 V, 10A ASM has an ASM 0.85 back power coefficient. stator copper losses are 500 W and rotor copper losses are 200 W. Friction and wind losses 100 W, core losses 300 W and stray load losses 50W. According to this; a. Air gap strength b. Mechanical strength produced c. Output power in horsepower D. Yield e. Slipping f. Working Speed g. Torque Produced h. Output Torque i. By specifying the asynchronous Motor power flow diagram from input to outputby drawing?
The 3-phase 3730W, 220V, 2-pole and 50 Hz induction motor has a slip of 0.025 at full load. The future of friction (friction)+reducing losses and other (stray load) losses is 5%. Find the induced (electromagnetic) moment at full load. Answer guide group 12.7863 Nm 84.6395 Nm 70.7351 Nm 25.5725 Nm 40.2582 Nm 38.3588Nm 51,1451 Nm 63.3692Nm
Three-phase 460-hp, 415 V, 4-pole, 50 Hz induction motor is operating at overvoltage of 480 V and reduced load of 80% of the rated value and draws a line current of 624.06A. The losses at these operating conditions are as follows: The stator conductor loss is 12.6kW, the rotor conductor loss is 10.4kW, the core loss is 11.00kW; and rotational losses is 4.129 kW. Sketch the power flow diagram, enter the known values, and determine (a) rotor speed (b) shaft output torque (c) developed mechanical torque in Nm. (d) input power to the stator; (f) the input power factor. Do only part (a), (b) & (c)
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.
Q1) A 4-pole, separately excited, wave wound DC machine with 0.12 armature resistance is rated for 230 V and 5 kW at a speed of 1200 rpm. If the same armature coils are reconnected to forms a lap winding, what is the power (in kW) at 1200 rpm of the reconnected machine if the field circuit is left unchanged? Also voltage regulation in both cases
A separately excited D.C motor is rated for a full load torque of 100Nm. For an applied voltage of 240V and for flux (φ) per pole of 30 mWb, the no-load and full load speeds of the motor are 1595 r.p.m and 1195 r.p.m respectively. (a) Find the armature resistance (b) If the applied voltage and the flux per pole are reduced to 200V and 20mWb respectively, Find the corresponding full load speed.
A three-phase induction motor, operating at rated voltage and frequency, has a startingtorque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-loadtorque. Ignoring the effects of the stator resistance and rotational losses and assumingconstant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load). The slip at maximum torque is 0.343 if that helps.
3-phase 3730W, 220V, 6-pole and 50 Hz induction motor operates at full load with a slip of 0.025. The sum of the rotational losses including friction + windage losses and other (stray load) losses is 5% of the output power. Find the induced (electromagnetic) moment at full load
a 220v dc shunt motor takes 5a and 40a at no load and full load respectively it has an armature resistance of 0.2 ohm and field resistance of 110 ohm respectively. iron,friction and windages losses are negligible.then using among parameters find following. the armature current at no load