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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/EX4.56 | |
| 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/EX4.56')
| -rw-r--r-- | 3760/CH4/EX4.56/Ex4_56.sce | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/3760/CH4/EX4.56/Ex4_56.sce b/3760/CH4/EX4.56/Ex4_56.sce new file mode 100644 index 000000000..14a2cccb7 --- /dev/null +++ b/3760/CH4/EX4.56/Ex4_56.sce @@ -0,0 +1,15 @@ +clc;
+v=230; // rated voltage of dc series motor
+n=1500; // speed at rated output
+i=20; // current drawn at rated output
+ra=0.3; // armature resistance
+rf=0.2; // field resistance
+disp('case a');
+// At starting Ea=0, therefore
+re=(v/i)-(ra+rf);
+printf('External resistance to be added in motor armature circuit to develop rated torque is %f ohms\n',re);
+disp('case b');
+n2=1000; // speed at rated torque has to be developed
+Ea2=(n2/n)*(v-i*(ra+rf)); // counter EMF at n=1000 rpm
+re=(v-Ea2-i*(ra+rf))/i;
+printf('External resistance to be added in motor armature circuit to develop rated torque is %f ohms\n',re);
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