1 files changed, 16 insertions, 0 deletions
diff --git a/3760/CH4/EX4.66/Ex4_66.sce b/3760/CH4/EX4.66/Ex4_66.sce
new file mode 100644
index 000000000..c54ec073a
--- /dev/null
+++ b/3760/CH4/EX4.66/Ex4_66.sce
@@ -0,0 +1,16 @@
+clc;
+// answer is calculated for torque=30 but it is asked for torque=40 i.e why answer varies
+p=4; // number of dc series motor
+f=4*10^-3; // ratio of flux per pole to armature current
+T=40; // torque of fan
+n=1000; // speed of motor
+a=2; // number of parallel path for waave winding
+z=480; // number of conductors
+ra=1; // armature resistance
+v=230; // supply voltage
+re=sqrt((T*2*%pi*a)/(p*z*f*n^2)); // ratio of armature current and new speed
+// Ea=vt-ia*ra writing ia in terms of n solving for n (n is new speed)
+n2=v/(re+((p*f*z)/(60*a)));
+printf('Motor speed is %f rpm\n',n2);
+ia=re*n2;
+printf('Armature current is %f A',ia);