1 files changed, 15 insertions, 0 deletions
diff --git a/3760/CH6/EX6.57/Ex6_57.sce b/3760/CH6/EX6.57/Ex6_57.sce
new file mode 100644
index 000000000..af8f8eb2e
--- /dev/null
+++ b/3760/CH6/EX6.57/Ex6_57.sce
@@ -0,0 +1,15 @@
+clc;
+tm=2; // ratio of maximum torque to full load torque
+r=0.2; // per phase rotor resistance referred to stator
+x=2; // per phase reactance referred to stator
+s=r/x; // slip at maximum torque
+disp('case a');
+ts1=(2*s*tm)/(s^2+1); 
+printf('Ratio of starting torque to full load torque is %f\n',ts1);
+disp('case b');
+ts2=ts1/3; 
+printf('Ratio of starting torque to full load torque with star-delta starter is %f\n',ts2);
+disp('case c');
+t=0.7; // tapping point 
+ts3=ts1*t^2; 
+printf('Ratio of starting torque to full load torque with autotransformer starter is %f\n',ts3);