5. A 220-volt shunt motor draws 64-Amp and runs at 500 rpm. Armature resistance, 0.25- ohm, field resistance 55-ohm. Find the speed when a resistor of 20-ohm is included in the shunt field circuit, the load torque remaining the same. Assume the flux to be proportiona to the field current.

5. A 220-volt shunt motor draws 64-Amp and runs at 500 rpm. Armature resistance, 0.25- ohm, field resistance 55-ohm. Find the speed when a resistor of 20-ohm is included in the shunt field circuit, the load torque remaining the same. Assume the flux to be proportiona to the field 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...

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Similar questions

A 6 pole, wave wound DC shunt generator has a useful total flux of 420 mWb. The armature winding consists of 220 turns each of 0.004 2 resistance, when running at 900 RPM the armature current is 50 A. If the armature winding reconnected as lap calculate the terminal voltage in case of wave and lap given that the field circuit and the speed are kept same.
A 220V DC shunt motor draws a no load armature current of 2.5A when running at 1400 rpm. Determine its speed when taking an armature current of 60A, if armature reaction weakens the flux by 3%.
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at of estion 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: O a None O b. 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 250 V DC shunt motor runs at 950 rpm and takes a line current of 55A.Find the resistance to be added to the field circuit to increase the speed 1200 rpm at an armature current of 75A.Take magnetic flux proportional to field current. Armature resistance is 0.1 ohm and field winding resistance is 125 ohms.