initial commit / add all books

1 files changed, 31 insertions, 0 deletions

diff --git a/1445/CH8/EX8.9/Ex8_9.sce b/1445/CH8/EX8.9/Ex8_9.sce
new file mode 100644
index 000000000..fa24acd41
--- /dev/null
+++ b/1445/CH8/EX8.9/Ex8_9.sce
@@ -0,0 +1,31 @@
+//CHAPTER 8- DIRECT CURRENT MACHINES
+//Example 9
+
+disp("CHAPTER 8");
+disp("EXAMPLE 9");
+
+//4 Pole 230 V lap wound shunt motor with 600 conductors. RPM 1800
+//VARIABLE INITIALIZATION
+P=4;                      //number of poles
+v_t=230;                  //in Volts
+I_l=52;                   //in Amperes
+Z=600;                    //tottal number of conductors
+r_f=115;                  //in Ohms
+d=30/100;                 //airgap diameter from cm to m
+l=20/100;                 //effective length of pole
+B=4100/10000;             //flux density from Gauss to Wb/m^2
+
+//SOLUTION
+
+I_f=v_t/r_f;              //I_f is same as I_sh 
+I_a=I_l-I_f;              // armature current
+ar=(%pi*d*l)/P;           //area of pole
+phi=ar*B;                 //phi = flux
+A=P;                      //for lap winding
+T=(phi*Z*I_a)/(2*%pi*A);  //Torque developed
+disp(sprintf("The torque developed in the motor is %.4f N-m",T));
+
+//The answer is different as 'A' has not been included in the denominator(in the book)
+
+//END
+