The core of a simple de motor is shown in Figure Q1. Assume that the effective crosssection area of each air gap is 18 cm² and the length of each air gap is 0.05cm. Theeffective diameter of the rotor core is 4 cm and the cross section area of the iron core is16 cm?. The relative permeability of the stator and rotor cores is 3800;i. Determine the total reluctance of the magnetic circuit.ii. Determine the value of the current that will produce a flux of 0.002 Wb.30 cmScm1000 turns4 cm:5cm30 cm ..A = 16 cm?%3DFigure Q1 Given a parallel plate capacitor where the medium between the 2 plates is purevacuum, the cross sectional area is 6 x 103 m? and the separation between the platesis 5 mm:Determine the value of the capacitance for the capacitor.ii. If a 120 V source is connected to the capacitor, determine the magnitudeof charge on each plate?iii. Determine the charge on the plate if acrylic is placed between the plates.The thickness of the acrylic sheet is 5 mm and its relative permittivity isgiven as 6.iv. Calculate the flux density for the capacitor states in part (iii).

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The core of a simple de motor is shown i

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

The core of a simple de motor is shown in Figure Q1. Assume that the effective cross
section area of each air gap is 18 cm² and the length of each air gap is 0.05cm. The
effective diameter of the rotor core is 4 cm and the cross section area of the iron core is
16 cm?. The relative permeability of the stator and rotor cores is 3800;
i. Determine the total reluctance of the magnetic circuit.
ii. Determine the value of the current that will produce a flux of 0.002 Wb.
30 cm
Scm
1000 turns
4 cm
:5cm
30 cm ..
A = 16 cm?
%3D
Figure Q1

Given a parallel plate capacitor where the medium between the 2 plates is pure
vacuum, the cross sectional area is 6 x 103 m? and the separation between the plates
is 5 mm:
Determine the value of the capacitance for the capacitor.
ii. If a 120 V source is connected to the capacitor, determine the magnitude
of charge on each plate?
iii. Determine the charge on the plate if acrylic is placed between the plates.
The thickness of the acrylic sheet is 5 mm and its relative permittivity is
given as 6.
iv. Calculate the flux density for the capacitor states in part (iii).

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