diff options
Diffstat (limited to '3760/CH6/EX6.2')
-rw-r--r-- | 3760/CH6/EX6.2/Ex6_2.sce | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/3760/CH6/EX6.2/Ex6_2.sce b/3760/CH6/EX6.2/Ex6_2.sce new file mode 100644 index 000000000..d9d044910 --- /dev/null +++ b/3760/CH6/EX6.2/Ex6_2.sce @@ -0,0 +1,40 @@ +clc;
+Nf=1440; //full load speed
+f=50; //frequency
+
+disp('case a');
+
+P=fix((120*f)/Nf); //formula for finding poles
+mprintf('The number of Poles is %d\n',P);
+
+disp('case b');
+
+
+Ns=(120*f)/P; //finding synchronous speed
+s=(Ns-Nf)/Ns; //finding slip at full load
+f2=s*f; //rotor frequency
+mprintf('The full load slip is %f and the rotor frequency is %f Hz\n',s,f2);
+
+disp('case c');
+
+
+//speed of stator field w.r.t stator structure is Ns
+Nss=Ns;
+// answer for speed of stator field with respect to stator structure is given wrong in book
+Wss=(2*%pi*Ns)/60;
+Nsr=Ns-Nf; //speed of stator field w.r.t rotor structure
+Wsr=(2*%pi*Nsr)/60;
+printf('The speed of stator field w.r.t stator is %f rad/sec ,%f rpm\n and w.r.t rotor is %f rad/sec ,%f rpm\n',Wss,Nss,Wsr,Nsr);
+
+disp('case d');
+
+
+//speed of rotor field w.r.t stator structure is Nf+Ns
+Nrr=(120*f2)/P; //speed of rotor field w.r.t rotor structure
+Nrs=Nf+Nrr;
+// answer for speed of rotor field with respect to rotor structure is given wrong in book
+Wrs=(2*%pi*Nrs)/60;
+
+Wrr=(2*%pi*Nrr)/60;
+//The stator and rotor fields are stationary w.r.t to each other
+printf('The speed of rotor field w.r.t stator structure is %f rad/sec, %f rpm\n and w.r.t rotor structure is %f rad/sec, %f rpm and speed of rotor field w.r.t stator field is 0',Wrs,Nrs,Wrr,Nrr);
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