A four-pole, 24 KW, 120 V, DC machine has a Duplex LAP-wound armature whichhas 80 coils with 10 turns per coil. Its rated speed is 2400 RPM.Assume no dead zone:If the resistance of this winding is 0.02 52 per conductor, what is the armatureresistance RA of this machine?AnswerThe armature resistance isOhms

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Answered: A four-pole, 24 KW, 120 V, DC machine…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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Q2) In DC machine, the speed is 800 RPM, the flux per pole is 2 m wb, and it has a Lap winding armature with 6 coils (4 turns conductor per coil) . The DC machine has 2 poles and armature draws lc= 5.5 A. If the winding redesigned as wave winding, find the EA , Tem and Pem and explain what will happen when we change the design from lap to wave winding connection.
For 6 polar D.C machine armature has 36 number of slots and the type of winding is a double layer simplex lap winding. a. How many coils are present? b. What is the coil span in terms of number of slots? c. If each coil has 4 turns, then what is the total number of armature conductors presents? d. How many parallel paths will be their in the armature? e. Altogether how many brushes will be their?
An 8 pole, simplex lap wound, shunt generatoe has 800 conductors and a flux per polw of 0.025Wb. The armature and shunt field resistances are 1 ohms and 45 ohms respectively. if a resistance of 11.25 ohms is connected as a load and the machine is running at 800 rpm. calculate the load cureent(in amp)
An 8-pole DC machine has a simplex wave-wound armature containing 200 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.004 Wb. What is the internal resistance of the armature in ohms? What is the current absorbed by this machine in amperes at the instant it's connected to a 100 Vdc source? What is the internally generated torque produced by the armature of this machine in N-m at the instant it's connected to the 100 Vdc source? With the DC machine connected to the 100 Vdc source, what is the steady state angular speed of the machine in rpm? What is the internally generated voltage of the armature of this machine at steady state in volts?
A six-pole dc machine has an armature connected as a lap winding. The armature has 32 slots with six conductors per slot. The armature is rotated at 600 rpm, and the flux per pole is 30 mWb. Calculate the induced voltage. 1
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An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Assume no dead zone Find the constant K and the flux per pole to produce the rated voltage at no-load conditions Select one: O a. K = 68.76 and flux = 5.71 mWb / pole O b. K = 86.76 and flux = 4.55 mWb / pole O c. K = 78.86 and flux = 5.33 mWb/pole O d. None
Calculate the flux per pole required on full-load for a 50 kW, 400 V, 8-pole, 600 r.p.m. d.c. shunt generator with 256 conductors arranged in a lap-connected winding. The armature winding resistances is 0.1 Q, the shunt field resistance is 200 Q and there is a brush contact voltage drop of 1 V at each brush on full- [0.162 Wb] 5. load. Calculate the flux in a 4-pole dynamo with 722 armature conductors generating 500 V when running at 1000 r.p.m. when the armature is (a) lap connected (b) wave connected. [(a) 41.56 mWb (b) 20.78 mWb] (City & Guilds, London) 7. A 4-pole machine running at 1500 r.p.m. has an armature with 90 slots and 6 conductors per slot. The flux per pole is 10 mWb. Determine the terminal e.m.f. as d.c. Generator if the coils are lap-connected. If the current per conductor is 100 A, determine the electrical power. [810 V, 324 kW] (London Univ.) 8. An 8-pole lap-wound d.c. generator has 120 slots having 4 conductors per slot. If each conductor can carry 250 A and if…
An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Ass ume no dead zone Find the constant K and the flux per poleto produce 80 Volts at no-load conditions Select one: O a. None O b. K = 68.86 and flux = 3.33 mwb/pole O c. K = 68.755 and flux = 3.7 mWb/ pole O d. K = 95.5 and flux = 3.7 mWb/ pole
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A DC shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field resistances are 0.01 2 and 44N respectively. The stray losses are 375 W. What is percentage efficiency of the DC generator
This course EHide blom Clear my choice An eight-pole, 24 KW, 124 V, DC machine has a duplex LAP-wound armature which has 72 coils with 6 turns per coil. Its rated speed is 3000 RPM. Assume no dead zone Find the constant K and the flux per pole to produce 80 Volts at no-load conditions Select one: a. None Ob. K = 68.86 and flux = 3.33 mWb/pole Oc.K = 68.755 and flux = 3.7 mWb / pole O d. K = 95.5 and flux = 3.7 mWb / pole A peries DC motor has a series-field windino of 25 turns per pole. Its armature resistance in 0,1 2. and its

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