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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 /2252/CH23/EX23.13 | |
| 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 '2252/CH23/EX23.13')
| -rwxr-xr-x | 2252/CH23/EX23.13/Ex23_13.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/2252/CH23/EX23.13/Ex23_13.sce b/2252/CH23/EX23.13/Ex23_13.sce new file mode 100755 index 000000000..85a00b6af --- /dev/null +++ b/2252/CH23/EX23.13/Ex23_13.sce @@ -0,0 +1,24 @@ +
+
+//calculating ratio of maximum to full load torque
+Nr=970//speed at full load torque in rpm
+Ns=50*120/6//synchronous speed in rpm
+s=(Ns-Nr)/Ns//slip at full load
+R2=.02//rotor resistance per phase
+X2=.3//rotor reactance per phase at standstill
+alpha=R2/X2
+//Full load torque Tf=k1*Kt
+k1=s*alpha/(s^2+alpha^2)
+//maximum torque Tmax=Kt/2
+x=1/(2*k1)
+mprintf("Ratio of maximum to full load torque=%f\n",x)
+//calculating speed at maximum torque
+s_m=R2/X2//slip at maximum torque
+Nm=(1-s_m)*Ns
+mprintf("Speed at maximum torque=%d rpm\n",round(Nm))
+//calculating ratio of starting torque to full load torque
+s=1//slip at starting
+//starting torque Tst=k2*Kt
+k2=s*alpha/(s^2+alpha^2)
+y=k2/k1
+mprintf("Ratio of starting torque to full load torque=%f\n",y)
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