A magnetic circuit consists of a cast steel yoke which has a cross-sectional area of 200 mm? and a mean length of 120 mm. There are two airgaps, each 0.2 mm long. Calculate: (a) the m.m.f. required to produce a flux of 0.05 mWb in the airgaps; (b) the value of the relative permeability of cast steel at this flux density. The magneotization curve for cast steel is given by the following: 0.1 0.2 0.3 0.4 B (T) H (A/m) 170 300 380 460

A magnetic circuit consists of a cast steel yoke which has a cross-sectional area of 200 mm? and a mean length of 120 mm. There are two airgaps, each 0.2 mm long. Calculate: (a) the m.m.f. required to produce a flux of 0.05 mWb in the airgaps; (b) the value of the relative permeability of cast steel at this flux density. The magneotization curve for cast steel is given by the following: 0.1 0.2 0.3 0.4 B (T) H (A/m) 170 300 380 460

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

Similar questions

2.3
w2
Q1. Figure 1 shows the magnetic circuit with cross section area of core, 1000 mm2 and current source, 10 mA. By assuming the absolute permeability of core is 2.513x103 H/m, analyze the circuit and determine the following parameters: a. Draw the equivalent Ampere Circuital Law model b. Total reluctance of magnetic circuit c. Magnetic flux at centre and both sided d. Magnetic flux density at centre and air gaps e. Magnetic flux strength at centre and air gaps f. Briefly explain, effect to the magnetic circuit if the length of air gaps keep decreasing and increasing. at 7 cm 30 cm 30 cm 7 cm 7 cm 30 cm 1 cm 400 turns 1 cm 7 cm Figure 1 B-H CURVE BIT) 16 Sheet steel Cast steel 14 12 1.0 08 Cast iron 0.6 04 0.2 H(AUm) 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
A magnetic core in the form of a closed circular ring has a mean length of 30 cm and a cross sectional area of 1 sq cm. Determine the reluctance if the relative permeability of iron is 2400
Q1: Start from first principles to prove that: "For a fixed flux density, the volume of the ferromagnetic core is directly proportional to the energy stored in the magnetic field".
Step by step full solution
Consider the magnetic circuit of with the dimensions of Problem 1.1. Assuming infinite core permeability, calculate (a) the number of turns required to achieve an inductance of 12 mH and (b) the inductor current which will result in a core flux density of 1.0 T. N turns Core: mean length 4. area A permeability Air gap R
A 35 kW shunt machine having an Armature Circuit Resistance of 0.55 Ω and a filed resistance of 130Ω,generates a terminal voltage of 230 V at full load. Find the Efficiency When I. act as a Generator at full load. II. act as a Generator at half load III. act as a Motor Assume the Iron, Friction and Windage losses are 0.8 kW.
the depth of the solid core is 5 cm. Assume that the relative permeability of the core is 1000 and remains constant and that the current in the coll is 4 A. ignore the fringing effects at the air gap and find the following
A straight long wire is carrying a current of 1000 A. Find the flux density at a point 1 ft from the wire.
Using Bio-Savart's law, determine the magnetic flux density produced by a single turn ofa current carrying loop. Consider ONLY the magnetic field along the axis of the loop.Assume that the radius of the loop is 'a', the current carried by the loop is 'l'. Otherparameters retain the standard units.
To a magnetic core, with a relative permeability of 2100, a current I1 of 1 A and a current I2 of 2 A are applied, where the number of turns of the winding is 1000. The depth of the magnetic core is 20 cm. take into account that the bounded measurements are given in centimeters. The air gap shown in the figure is 0.2 cm and has an effective area equivalent to 1.1 times the cross-sectional area of the core. Determine:a) The equivalent circuit with sources and reluctance (Graph it)b) The magnetic flux of the central columnc) Magnetic induction at point Ad) Explain what would happen if the flow of current I1 is reversed