8. Figure 4 shows the core of a simple dc motor. The magnetization curve for the metal in this core is given by Figure 5 and Figure 6. Assume that the cross-sectional area of each air gap is 18 cm² and that the width of each air gap is 0.05 cm. The effective diameter of the rotor core is 4 cm. ii. iii. It is desired to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core? What would be the total flux in the core at the flux density of part (i)? The maximum possible field current for this machine is I A. Select a reasonable number of turns of wire to provide the desired flux density while not exceeding the maximum available current. 4cm Nurs Depth 4 cm -48 cm- -0.05 cm

8. Figure 4 shows the core of a simple dc motor. The magnetization curve for the metal in this core is given by Figure 5 and Figure 6. Assume that the cross-sectional area of each air gap is 18 cm² and that the width of each air gap is 0.05 cm. The effective diameter of the rotor core is 4 cm. ii. iii. It is desired to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core? What would be the total flux in the core at the flux density of part (i)? The maximum possible field current for this machine is I A. Select a reasonable number of turns of wire to provide the desired flux density while not exceeding the maximum available current. 4cm Nurs Depth 4 cm -48 cm- -0.05 cm

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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The following figure shows a simplified endivi and inductor for a dc motor. The inductor has an average magnetic path length of 50 cm and a cross-sectional area of 12 cm2. The mean path length of the endivi is 5 cm and the cross-sectional area is given as 12 cm2. The air gap between the armature and the inductor is 0.05 cm, and the cross-sectional area of each air gap (including fringe effect) is 14 cm2. The magnetic permeability of the iron of the core is µr =2000 H/m and 200 turns are wound on the core. If the current through the conductor is set to be 1 A,a) What is the mmm force of the magnetic circuit?b) What is the reluctance of the inductor and armature?c) What is the magnetic flux density in the air gap?Is it Tesla?d) Calculate the inductance of the winding.e) If 10 turns of bandage are wrapped around the armature under these conditions,What is the torque to be induced if current A is passed?
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 4 pole armature of a DC machine has 175 conductors and a flux per pole of 0.1 wb. Find the EMF generated when running at 600 rpm, when the armature is Lap wound.
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