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Diffstat (limited to '3681/CH4/EX4.35/Ex4_35.sce')
| -rw-r--r-- | 3681/CH4/EX4.35/Ex4_35.sce | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/3681/CH4/EX4.35/Ex4_35.sce b/3681/CH4/EX4.35/Ex4_35.sce new file mode 100644 index 000000000..1e69d2ea2 --- /dev/null +++ b/3681/CH4/EX4.35/Ex4_35.sce @@ -0,0 +1,15 @@ +// Calculating the continuous rating of motor
+clc;
+disp('Example 4.35, Page No. = 4.67')
+// Given Data
+Psh = 37.5;// Power rating of motor (in kW)
+th = 30;// Time (in minuts)
+Th = 90;// Heating time constant (in minuts)
+// Calculation of the continuous rating of motor
+ph = 1/(1-%e^(-th/Th));// Heating overload ratio
+K = 0.7^(2);// Maximum efficiency occurs at 70% full load
+pm = ((K+1)*ph-K)^(1/2);// Mechanical overload ratio
+Pnom = Psh/pm;// Continuous rating of motor (in kW)
+disp(Pnom,'Continuous rating of motor (kW)=');
+//in book answer is 17.2 kW. The answers vary due to round off error
+
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