diff options
Diffstat (limited to '503/CH8/EX8.31/ch8_31.sci')
| -rwxr-xr-x | 503/CH8/EX8.31/ch8_31.sci | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/503/CH8/EX8.31/ch8_31.sci b/503/CH8/EX8.31/ch8_31.sci new file mode 100755 index 000000000..b5eb73d87 --- /dev/null +++ b/503/CH8/EX8.31/ch8_31.sci @@ -0,0 +1,27 @@ +//to calculate synchronising power and torque coeff/deg mech shift
+
+clc;
+V=11000;
+Vt=V/sqrt(3);
+P=6*10^6;
+Ia=P/(sqrt(3)*V);
+ohm_b=Vt/Ia;
+Xs=.5;
+Xss=Xs*ohm_b;
+
+f=50;
+P=8;
+n_s=(120*f/P)*(2*%pi/60);
+
+Ef=Vt;
+dl=0;
+Psyn=(%pi/15)*(Ef*Vt/Xss)*cosd(dl);disp(Psyn,'synchronising power(W)');
+Tsyn=Psyn/n_s;disp(Tsyn,'torque coeff(Nm)');
+
+pf=.8;
+phi=acosd(pf);
+Ef=Vt+j*Ia*Xss*complex(cosd(-phi),sind(-phi));
+dl=atand(imag(Ef)/real(Ef));
+Psyn=(%pi/15)*(abs(Ef)*Vt/Xss)*cosd(dl);disp(Psyn,'synchronising power(W)');
+Tsyn=Psyn/n_s;disp(Tsyn,'torque coeff(Nm)');
+
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