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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/EX4.52 | |
| 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/EX4.52')
| -rw-r--r-- | 3760/CH4/EX4.52/Ex4_52.sce | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/3760/CH4/EX4.52/Ex4_52.sce b/3760/CH4/EX4.52/Ex4_52.sce new file mode 100644 index 000000000..596f792b3 --- /dev/null +++ b/3760/CH4/EX4.52/Ex4_52.sce @@ -0,0 +1,14 @@ +clc;
+v=240; // supply voltage
+n=1000; // speed of motor
+i=40; // current drawn from supply
+rf=0.2; // field resistance
+ra=0.25; // armture resistance
+rd=0.3; // diverter resistance
+// torque is constant for different speeds
+// when diverter is put in parallel with series resistance then some fraction of armature current flows through series circuit this current for constant torque is given by
+ia2=sqrt(i^2/(rd/(rf+rd)));
+Ea1=v-i*(ra+rf); // counter EMf at n=1000 rpm
+Ea2=v-ia2*(ra+((rf*rd)/(rf+rd))); // counter EMF at new speed
+n2=(Ea2*n*i)/(Ea1*(rd/(rf+rd))*ia2);
+printf('Motor speed after diverter is put in parallel with series field winding is %f rpm',ceil(n2));
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