blob: 0baa27acf66ac5efa342b812d1e3750ab5aefeb5 (
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
|
// Electric Machinery and Transformers
// Irving L kosow
// Prentice Hall of India
// 2nd editiom
// Chapter 4: DC Dynamo Torque Relations-DC Motors
// Example 4-3
clear; clc; close; // Clear the work space and console.
// Given data
Z = 700 ; // no. of conductors
d = 24 ; // diameter of the armature of the dc motor in inches
l = 34 ; // axial length of the coil in inches
B = 50000 ; // Flux density in lines/sq.inches
I = 25 ; // Current carried by the coil in A
// Calculations
F_av = ( B * I * l * 10 ^ -7 ) / 1.13 * ( 700 * 0.7 ) ; // average force
// developed on each coil side in lb
r = d / 2; // radius of the coil in inches
T_av = F_av * ( r /12 ) ; // armature average torque in lb-ft
// Display the results
disp("Example 4-3 Solution : ")
printf("\n a : Fav = %.2f lb ", F_av );
printf("\n b : Tav = %.2f lb-ft ", T_av );
|
