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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3760/CH4/EX4.44/Ex4_44.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3760/CH4/EX4.44/Ex4_44.sce')
| -rw-r--r-- | 3760/CH4/EX4.44/Ex4_44.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/3760/CH4/EX4.44/Ex4_44.sce b/3760/CH4/EX4.44/Ex4_44.sce new file mode 100644 index 000000000..9f09c2a59 --- /dev/null +++ b/3760/CH4/EX4.44/Ex4_44.sce @@ -0,0 +1,19 @@ +clc;
+v=200; // rated voltage of dc shunt motor
+ra=0.1; // armature resistance
+n=1000; // running speed of motor
+ia=50; // armature current at n=1000 rpm
+re=0.1; // reduction in field flux
+disp('case a');
+Ea1=v-ia*ra; // initial counter EMF
+Ea2=Ea1*(1-re); // counter EMF after reduced field flux
+iam=(v-Ea2)/ra;
+printf('Maximum value of armature current is %f A\n',iam);
+T=(iam/ia)*(1-re);
+printf('Torque corresponding to maximum armature current is %f times initial torque\n',T);
+disp('case b');
+ia2=(1/(1-re))*ia;
+printf('Armature current when transients are over is %f A\n',ia2);
+Ea2=v-ia2*ra; // counter EMF when transients are over
+n2=(Ea2*n)/(Ea1*(1-re));
+printf('Ultimate speed after transients are over is %f rpm',ceil(n2));
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