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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 /1319/CH6/EX6.21/6_21.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 '1319/CH6/EX6.21/6_21.sce')
| -rw-r--r-- | 1319/CH6/EX6.21/6_21.sce | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/1319/CH6/EX6.21/6_21.sce b/1319/CH6/EX6.21/6_21.sce new file mode 100644 index 000000000..b4cbf3bf7 --- /dev/null +++ b/1319/CH6/EX6.21/6_21.sce @@ -0,0 +1,37 @@ +//Rated torque calculation by resistance addition
+
+clc;
+clear;
+
+V=240;
+I=40;
+Ra=0.3;
+N1=1500/60;// speed in rotations per sec
+N2=1000/60;
+
+Pi=V*I;// Power input
+
+Pc=(I^2)*Ra; // Copper loss
+
+Po=Pi-Pc;
+
+T=Po/(2*%pi*N1);// Rated torque
+
+R1=V/I; // Back EMF is zero
+
+Rex1=R1-Ra;
+
+//Eb directly to N(speed)
+
+Eb1500=V-(I*Ra);
+Eb1000=N2*Eb1500/N1;
+
+R=poly([0 1],'R','c');
+
+x=(V-Eb1000)-(I*(R+Ra)); // Characteristic equation to find external resistance
+
+Rex2=roots(x);
+
+printf('The value of the resistance to be added to obtain rated torque \n')
+printf('a) At starting = %g ohms\n',Rex1)
+printf('b) At 1000 rpm = %g ohms\n',Rex2)
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