initial commit / add all books

1 files changed, 29 insertions, 0 deletions

diff --git a/1938/CH3/EX3.30/3_30.sce b/1938/CH3/EX3.30/3_30.sce
new file mode 100755
index 000000000..b12f78145
--- /dev/null
+++ b/1938/CH3/EX3.30/3_30.sce
@@ -0,0 +1,29 @@
+clc,clear

+printf('Example 3.30\n\n')

+

+V=400, I=50

+I_a_g=250 ,I_a_m =300  //armature current for generator and motor

+I_sh_g=2.5 ,I_sh_m =2.4 //field current for generator and motor

+R_a=0.1 //armature resistance

+

+arm_cu_loss_g = R_a*I_a_g^2   //armature copper loss for generator

+arm_cu_loss_m = R_a*I_a_m^2   //armature copper loss for motor

+power_drawn=V*I

+IFW_losses = power_drawn - (arm_cu_loss_g + arm_cu_loss_m)  //Iron , friction and windage losses

+IFW_losses_each= IFW_losses /2  // Iron , friction and windage losses for each machine

+

+//for motor

+field_cu_loss_m= V*I_sh_m //field copper loss for motor

+total_loss_m= field_cu_loss_m + IFW_losses_each  +  arm_cu_loss_m

+motor_input=V * I_a_m

+motor_output= motor_input - total_loss_m

+eta_m = 100*(motor_output/motor_input)    //motor efficiency

+printf('Efficiency of motor is %.2f percent\n',eta_m)

+

+//for generator

+field_cu_loss_g= V*I_sh_g //field copper loss for generator

+total_loss_g = field_cu_loss_g + arm_cu_loss_g + IFW_losses_each

+generator_output=V*I_a_g

+generator_input = generator_output + total_loss_g

+eta_g = 100*(generator_output/generator_input)//generator efficiency

+printf('Efficiency of generator is %.2f percent\n',eta_g)