blob: 8ca42e2515336e66d20e7213b0352ef92e22c11d (
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 machines and power systems by Syed A Nasar
//Publisher:Tata McGraw Hill
//Year: 2002 ; Edition - 7
//Example 6.8
//Scilab Version : 6.0.0 ; OS : Windows
clc;
clear;
V=230; //supply voltage in v
Ra=.05; //armature resistance in ohms
Rf1=75; //field resistance in no load in ohms
Rf2=100; //field resistance in on load condition in ohms
I1=7;N1=1120; //no load current and speed
I2=46; //on load current in A
Ra2=0.15 //armature resistance at on load condition in ohms
If=V/Rf1;
Ia1=I1-If;
K=(V-Ia1*Ra)/(N1*If);
Ia2=I2-If;
N=(V-Ia2*Ra)/(If*K);
If1=V/Rf1;
Ia0=I2-If1;
n=(V-Ia2*Ra2)/(If1*K);
pl=(Ia0^2)*0.1;
printf('speed of the motor is %d rpm\n',n)
printf('power dissipated in 0.1 ohm resistor is %f W',pl)
|
