From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 503/CH9/EX9.6/ch9_6.sci | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100755 503/CH9/EX9.6/ch9_6.sci

(limited to '503/CH9/EX9.6/ch9_6.sci')

diff --git a/503/CH9/EX9.6/ch9_6.sci b/503/CH9/EX9.6/ch9_6.sci
new file mode 100755
index 000000000..5c2f425b8
--- /dev/null
+++ b/503/CH9/EX9.6/ch9_6.sci
@@ -0,0 +1,45 @@
+//to calculate starting torque and current,full load current,pf, torque , internal and overall eff,slip and max torque
+
+clc;
+R1=.3;
+R2=.25;
+X1=.6;
+X2=.6;
+Xm=35;
+Prot=1500;
+V=231;
+Z_TH=complex(0,Xm)*complex(R1,X1)/complex(R1,X1+Xm);
+V_TH=(V*complex(0,Xm))/complex(R1,X1+Xm);
+n_s=1500;
+w_s=2*%pi*n_s/60;
+
+s=1;
+Z_f=complex(0,Xm)*complex(R2,X2)/complex(R2,X2+Xm);
+R_f=real(Z_f);
+Z_in=Z_f+complex(R1,X1);
+I1=V/abs(Z_in);disp(I1,'starting current(A)');
+Tstart=3*I1^2*R_f/w_s;disp(Tstart,'starting torque(Nm)');
+
+n=1450;
+s=1-n/n_s;
+a=R2/s;
+Z_f=complex(0,Xm)*complex(a,X2)/complex(a,X2+Xm);
+R_f=real(Z_f);
+Z_in=Z_f+complex(R1,X1);
+I1=V/abs(Z_in);disp(I1,'full load current(A)');
+pf=cosd(atand(imag(Z_in)/real(Z_in)));disp(pf,'pf');
+P_G=3*I1^2*R_f;
+Popg=P_G*(1-s);
+Pop=Popg-Prot;
+Tnet=Pop/((1-s)*w_s);disp(Tnet,'net torque(Nm)');
+Vt=400;
+Pip=sqrt(3)*Vt*I1*pf;
+eff=Pop/Pip;disp(eff*100,'efficiency(%)');
+int_eff=Popg/Pip;disp(int_eff*100,'internal eff(%)');
+
+s_max_T=1/(sqrt(real(Z_TH)^2+(imag(Z_TH)+X1)^2)/R2);disp(s_max_T,'max slip');
+Z_tot=Z_TH+complex(R2/s_max_T,X2);
+I2=abs(V_TH)/abs(Z_tot);
+T_max=3*I2^2*(R2/s_max_T)/w_s;
+disp(T_max,'max torque(Nm)');
+
-- 
cgit