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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 /3681/CH9/EX9.10/Ex9_10.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3681/CH9/EX9.10/Ex9_10.sce')
| -rw-r--r-- | 3681/CH9/EX9.10/Ex9_10.sce | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/3681/CH9/EX9.10/Ex9_10.sce b/3681/CH9/EX9.10/Ex9_10.sce new file mode 100644 index 000000000..3fa502598 --- /dev/null +++ b/3681/CH9/EX9.10/Ex9_10.sce @@ -0,0 +1,17 @@ +// Calculating the demagnetizing and cross magnetizing mmf per pole
+clc;
+disp('Example 9.10, Page No. = 9.38')
+// Given Data
+P = 500;// Power rating (in kW)
+rpm = 375;// Speed in r.p.m.
+p = 8;// Number of poles
+flux = 0.0885;// Flux per pole (in Wb per meter)
+// Calculation of the demagnetizing and cross magnetizing mmf per pole
+n = rpm/60;// Speed in r.p.s.
+alpha = 5/100*180;// Brush shift (in electrical degree). Since the brushes are given a lead by of 5% of pole pitch
+ATa = P/(2*flux*n*p*p*10^(-3));// Armature mmf per pole (A)
+ATad = ATa*2*alpha/180;;// Demagnetizing mmf per pole (A)
+ATaq = ATa-ATad;// Cross magnetizing mmf per pole (A)
+disp(ATad,'Demagnetizing mmf per pole (A) =');
+disp(ATaq,'Cross magnetizing mmf per pole (A) =');
+//in book answers are 706 (A) and 6354 (A) respectively. The answers vary due to round off error
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