blob: 3e4f82daf4ece5fea7fb8e1b75d56eacd3712502 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
// Electric Machinery and Transformers
// Irving L kosow
// Prentice Hall of India
// 2nd editiom
// Chapter 4: DC Dynamo Torque Relations-DC Motors
// Example 4-2
clear; clc; close; // Clear the work space and console.
// Given data
d = 18 ; // diameter of hte coil in inches
l = 24 ; // axial length of the coil in inches
B = 24000 ; // Flux density in lines/sq.inches
I = 26 ; // Current carried by the coil in A
theta = 60 ; // angle between the useful force & the interpolar ref axis in deg
// Calculations
F = ( B * I * l * 10 ^ -7 ) / 1.13 ; // force developed on each coil side in lb
f = F * sind(theta); // force developed at the instant the coil lies at an angle
// of 60 w.r.t the interpolar ref axis
r = d / 2; // radius of the coil in inches
T_c = f * ( r * 1 / 12); // torque developed in lb.ft/conductor
// Display the results
disp("Example 4-2 Solution : ")
printf("\n a : F = %.3f lb ", F );
printf("\n b : f = %.2f lb ", f );
printf("\n c : Tc = %.3f lb-ft/conductor ", T_c );
|
