2 files changed, 34 insertions, 0 deletions
diff --git a/431/CH4/EX4.24/EX4_24.sce b/431/CH4/EX4.24/EX4_24.sce
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+//Calculate speed of motor and maximium torque
+//Chapter 4
+//Example 4.24
+//page 321
+clear;
+clc; 
+disp("Example 4.24")
+V=400;                //supply voltage in volts
+f=50;                    //frequency in hertz
+P=6;                  //number of poles
+ph=3;                  //three phase supply
+R2=0.03;                //rotor resistance in ohms
+X20=0.4;                 //rptor reactance in ohms
+Nr=960;                //full load speed in rpm
+Ns=(120*f)/P;
+printf("synchronous speed=%drpm",Ns)
+S=(Ns-Nr)/Ns;            //corresponding slip
+//maximium torque Tm occurs at S=(R2/X20)
+//we get Tm=k/(2*X20)
+a=R2/X20;
+//r=Tm/T
+r=(a^2+S^2)/(2*a*S);
+Sm=(R2/X20);
+printf("\nSlip at maximium torque,Sm=%f",Sm);
+//corresponding speed
+Nr2=Ns*(1-Sm);
+printf("\nRotor speed at maximium torque=%drpm",Nr2)
+
+
diff --git a/431/CH4/EX4.24/resultEX4_24.txt b/431/CH4/EX4.24/resultEX4_24.txt
new file mode 100755
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+  
+ Example 4.24   
+synchronous speed=1000rpm
+Slip at maximium torque,Sm=0.075000
+Rotor speed at maximium torque=925rpm 
+\ No newline at end of file