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| 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/EX3.5/3_5.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/EX3.5/3_5.sce')
| -rwxr-xr-x | 1938/CH3/EX3.5/3_5.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/1938/CH3/EX3.5/3_5.sce b/1938/CH3/EX3.5/3_5.sce new file mode 100755 index 000000000..1fe8be0f0 --- /dev/null +++ b/1938/CH3/EX3.5/3_5.sce @@ -0,0 +1,23 @@ +clc,clear
+printf('Example 3.5\n\n')
+
+V=250
+I_av=10
+V_av=(240+220)/2 //average voltage across load
+W_dash=V_av*I_av //Power absorbed
+t1=25,t2=6
+R_sh=200,R_a=0.3//resistance of field winding and armature
+
+W=W_dash*t2/(t1-t2) //Stray Losses
+I_l=25 //Input current
+I_sh=V/R_sh //current through field winding
+
+I_a=I_l-I_sh //Armature current
+arm_cu_loss=R_a*I_a^2 //Armature copper losses
+sh_cu_loss=R_sh*I_sh^2 // Shunt copper loss
+
+Total_losses= arm_cu_loss + sh_cu_loss + W
+Motor_input=V*I_l
+Output=Motor_input- Total_losses
+efficiency=Output*100/Motor_input
+printf('Efficiency as motor at 25 A and 250 V is %.2f percent',efficiency)
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