1 files changed, 27 insertions, 0 deletions
diff --git a/1938/CH2/EX2.12/2_12.sce b/1938/CH2/EX2.12/2_12.sce
new file mode 100755
index 000000000..defe7c611
--- /dev/null
+++ b/1938/CH2/EX2.12/2_12.sce
@@ -0,0 +1,27 @@
+clc,clear
+printf('Example 2.12\n\n')
+
+R_a= 1, I_a=1.2 , V=50
+//part(i)
+E_b = V - I_a*R_a
+rot_loss_NL =E_b*I_a //no load rotational loss 
+printf('(i)No load rotational losses = %.2f W',rot_loss_NL)
+
+//part(ii)
+omega_2000=2*%pi*2000/60 //angular velocity when speed of motor =2000 rpm
+K_m=E_b/omega_2000   //to determine K_m
+V=48
+omega_1800=2*%pi*1800/60 //angular velocity when speed of motor =1800 rpm
+E_b=K_m*omega_1800
+I_a = (V-E_b)/R_a  //armature current
+P_dev = E_b*I_a//power developed
+motor_output =  P_dev - rot_loss_NL
+printf('\n(ii)Motor output = %.2f W',motor_output)
+
+//part(iii)
+E_b=0 //when motor stalls
+V_stall=20 //voltage during stalling
+I_a=V_stall/R_a //armature current during stalling
+T_stall = K_m*I_a //stalling torque
+printf('\n(iii)Stalling torque = %.2f N-m',T_stall)
+printf('\n\npart(ii) answer is slightly different due to inaccurate calculation of Power developed')