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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/EX4.70 | |
| 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/EX4.70')
| -rw-r--r-- | 3760/CH4/EX4.70/Ex4_70.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/3760/CH4/EX4.70/Ex4_70.sce b/3760/CH4/EX4.70/Ex4_70.sce new file mode 100644 index 000000000..6af9d35e4 --- /dev/null +++ b/3760/CH4/EX4.70/Ex4_70.sce @@ -0,0 +1,19 @@ +clc;
+v=240; // rated voltage of motor and supply voltage
+i=5.2; // line current
+p=10000; // rated power of motor
+no=1200; // no load speed
+ra=0.25; // armature resistance
+rf=160; // field resistance
+ifl=v/rf; // constant field current
+iao=i-ifl; // no load armature current
+wo=v*iao-iao^2*ra; // no load rotational losses
+// by using equation of electromagnetic power solving quadratic equation in armature current whose terms are
+t1=ra;
+t2=-v;
+t3=p+wo;
+P=[ t1 t2 t3 ];
+ia=roots(P);
+pi=(v-ia(2)*ra)*ia(2)+ia(2)^2*ra+ifl*v; // motor input
+nm=(p/pi)*100;
+printf('Motor efficiency at rated load is %f percent',nm);
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