diff options
| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3574/CH5/EX5.8/EX5_8.sce | |
| 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 '3574/CH5/EX5.8/EX5_8.sce')
| -rw-r--r-- | 3574/CH5/EX5.8/EX5_8.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/3574/CH5/EX5.8/EX5_8.sce b/3574/CH5/EX5.8/EX5_8.sce new file mode 100644 index 000000000..915351ce4 --- /dev/null +++ b/3574/CH5/EX5.8/EX5_8.sce @@ -0,0 +1,29 @@ +// Example 5.8
+// Determine (a) Expected minimum locked-rotor torque (b) Repeat (a) when
+// voltage and frequency dropped to 230V and 58Hz
+// Page No. 193
+
+clc;
+clear;
+close;
+
+// Given data
+HPrated=75; // Rated horsepower
+nrated=1750; // Rated speed
+V1=240; // Rated voltage
+V2=230; // Voltage after drop
+F1=60; // Rated frequency
+F2=58; // Frequency after drop
+
+// (a) Expected minimum locked-rotor torque
+Trated=5252*HPrated/nrated; // Rated torque
+Tlr=Trated*1.2; // Minimum locked-rotor torque is 120% rated
+
+// (b) Expected minimum locked-rotor torque when voltage and frequency dropped
+// to 230V and 58Hz
+Tlr2=Tlr*((V2/F2)^2)*((F1/V1)^2);
+
+// Display result on command window
+printf("\n Expected minimum locked-rotor torque = %0.0f lb-ft",Tlr);
+printf("\n Expected minimum locked-rotor torque after drop = %0.0f lb-ft",Tlr2);
+
|