A DC motor has the following specifications: 10 hp, 37.5 A, 230 V; flux / pole = 0.01 Wb, number of poles = 4, number of conductors = 666, number of parallel paths = 2. Armature resistance = 0.2670. The armature reaction is negligible and rotational losses are 600W. The motor operates from a 230V DC supply. If the motor runs at 1000 rpm, the output torque produced in (in Nm) is_

A DC motor has the following specifications: 10 hp, 37.5 A, 230 V; flux / pole = 0.01 Wb, number of poles = 4, number of conductors = 666, number of parallel paths = 2. Armature resistance = 0.2670. The armature reaction is negligible and rotational losses are 600W. The motor operates from a 230V DC supply. If the motor runs at 1000 rpm, the output torque produced in (in Nm) is_

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...

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q1 a
A DC motor has the following specifications: 10 hp, 37.5 A, 230 V; flux / pole = 0.01 Wb, number of poles = 4, number of conductors = 666, number of parallel paths = 2. Armature resistance = 0.2672. The armature reaction is negligible and rotational losses are 600W. The motor operates from a 230V DC supply. If the motor runs at 1000 rpm, the output torque produced in (in Nm) is
A 4 pole lap wound DC shunt motor armature has 600 conductors, if the useful flux per pole is 35mWb, while running it generates the emf of 256 V. What will be the rotor speed of DC motor?
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
The armature of a 4 -polelap wound shunt generator has 400 conductors.The flux per pole is 0.05 Wb.The armature and field resistance are 0.05Qand 500. Find the speed of the machine when supplying 450 A at a terminal voltage of 250 V.
A DC series motor, running a fan at 1000 rpm, take 50 A from 250 V mains. The armature plus field resistance is 0.6 Q. If an additional resistance of 4.4 Q is inserted in series with the armature circuit, the motor speed (approximately) in case the field flux is proportional to armature current is rpm.
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
q10
A lap-winding DC machine has 24 coils, 18 turns per coil, and 4 poles. The average flux density per pole is 1T. The effective length is 40 cm and the armature radius is 10 cm. The armature velocity is 140.2 rad/sec and the armature current is 24 A. The average flux per pole in Wb is: 6.283 0.06283 O 0.6283 0.006283
A 220 V DC machine has an armature resistance of 1 Q. If the full load current is 20 A, what is the difference in induced voltage when the machine is running as generator and motor under full load condition
A 600 V series motor takes 120 A and operates at 900 rpm when the load is80 HP. If the effective circuit resistance is 0.20 ohm, calculate the HPoutput of the motor when the current drops to 90 A. assuming that the fluxis reduced by 20 %. [Ans. 49.86 HP]