blob: 28b75f95b3beaeafcce978967bea913674777ae9 (
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
|
//to find slip at max torque,full load slip and rotor current at starting
clc;
//Tfl=(3/w_s)*(V^2*Rs/s_fl)/((R2/s_fl)^2+X2^2); (i)
//Ts=(3/w_s)*(V^2*R2)/(R2^2+X2^2); (ii)
//Tmax=(3/w_s)*(.5*V^2)/X2^2; (iii)
//Tmax/Ts=2; k=R2/X2; (iii)/(ii)and solving
//k^2-4*k+1=0;
function [x]=quad(a,b,c)
d=sqrt(b^2-4*a*c);
x1=(-b+d)/(2*a);
x2=(-b-d)/(2*a);
if(x1>x2)
x=x2;
else
x=x1;
end
endfunction
k=quad(1,-4,1);
disp(k,'s_max_T');
//(iii)/(i)and solving
//s_fl^2-1.072*s_fl+.072=0
s_fl=quad(1,-1.072,.072);
disp(s_fl,'s_fl');
//a=I2_start/I2_fullload
a=sqrt((k/s_fl)^2+1)/(k^2+1);
disp(a,'I2_start/I2_fullload');
|
