diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1938/CH3/EX3.28/3_28.sce | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '1938/CH3/EX3.28/3_28.sce')
| -rwxr-xr-x | 1938/CH3/EX3.28/3_28.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/1938/CH3/EX3.28/3_28.sce b/1938/CH3/EX3.28/3_28.sce new file mode 100755 index 000000000..b20cf5ef4 --- /dev/null +++ b/1938/CH3/EX3.28/3_28.sce @@ -0,0 +1,24 @@ +clc,clear
+printf('Example 3.28\n\n')
+
+V=500,P=1000*10^3,I=30
+I_a_m = 200 + 30 , I_a_g =200 //armature current for motor and generator
+I_sh_m = 1.8, I_sh_g =3.5 //field current for motor and generator
+brush_drop=230
+R_a=0.075 //armature resitance
+
+arm_cu_loss_m = R_a*I_a_m^2 + 2*brush_drop //motor armature copper loss
+field_cu_loss_m =V*I_sh_m // motor field copper loss
+
+arm_cu_loss_g = R_a*I_a_g^2 + 2*brush_drop //generator armature copper loss
+field_cu_loss_g =V*I_sh_g //field copper loss generator
+
+total_cu_loss = field_cu_loss_g + arm_cu_loss_g + field_cu_loss_m + arm_cu_loss_m //total copper loss for both machines
+P_aux = V*I //power taken from auxillary supply
+stray_loss= P_aux - total_cu_loss
+stray_loss_each = stray_loss/2 //stray loss for each machine
+
+total_loss_g = stray_loss_each + arm_cu_loss_g + field_cu_loss_g //total loss in generator
+generator_output=V* I_a_g
+eta_g = 100*(generator_output/(generator_output + total_loss_g))//generator efficiency
+printf('Efficiency of generator is %.0f percent\n',eta_g)
|