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| author | Siddharth Agarwal | 2019-09-03 18:27:40 +0530 |
|---|---|---|
| committer | Siddharth Agarwal | 2019-09-03 18:27:40 +0530 |
| commit | 8ac15bc5efafa2afc053c293152605b0e6ae60ff (patch) | |
| tree | e1bc17aae137922b1ee990f17aae4a6cb15b7d87 /Working_Examples/2777/CH5/EX5.17 | |
| parent | 52a477ec613900885e29c4a0b02806a415b4f83a (diff) | |
| download | Xcos_block_examples-master.tar.gz Xcos_block_examples-master.tar.bz2 Xcos_block_examples-master.zip | |
Diffstat (limited to 'Working_Examples/2777/CH5/EX5.17')
| -rwxr-xr-x | Working_Examples/2777/CH5/EX5.17/Ex5_17.sce | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/Working_Examples/2777/CH5/EX5.17/Ex5_17.sce b/Working_Examples/2777/CH5/EX5.17/Ex5_17.sce new file mode 100755 index 0000000..ea44107 --- /dev/null +++ b/Working_Examples/2777/CH5/EX5.17/Ex5_17.sce @@ -0,0 +1,59 @@ +
+// ELECTRICAL MACHINES
+// R.K.Srivastava
+// First Impression 2011
+// CENGAGE LEARNING INDIA PVT. LTD
+
+// CHAPTER : 5 : INDUCTION MACHINES
+
+// EXAMPLE : 5.17
+
+clear ; clc ; close ; // Clear the work space and console
+
+
+// GIVEN DATA
+
+printf("\n EXAMPLE : 5.17 : \n\n Given Data No-load test : 440V, 3.0A, 500KW, 50Hz \n");
+printf("\n Blocked rotor test at rated frequency : 110V, 18A, 2500W, 50Hz \n");
+printf("\n DC test on Stator per phase : 10V, 15A \n");
+m = 3; // Total Number of phase in Induction Motor
+p = 4; // Total number of Poles of Induction Motor
+f = 50; // Frequency in Hertz
+V = 440; // Operating Voltage of the Inductuon Motor
+out_hp = 20; // Motor Power Rating in Horse-Power
+Vdc = 10; // DC Voltage in Volts
+Idc = 15; // DC Current in Amphere
+Wsc = 2500; // Power at Blocked Rotor test rated frequency in Watts
+Wsc_red = 2050; // Power at Blocked Rotor test reduced frequency in Watts
+Vsc = 110; // Voltage at Blocked Rotor test rated frequency in Volts
+Isc = 18; // Current at Blocked Rotor test rated frequency in Amphere
+Wo = 500; // Power at No-load test in Watts
+Vo = 440; // Voltage at No-load test in Volts
+Io = 4.0; // Current at No-load test in Amphere
+fsc = 50; // Rated Frequency at blocked rotor test in Hertz
+fo = 50; // Rated Frequency at no-load test in Hertz
+fsc1 = 15; // Reduced Frequency at blocked rotor in Hertz
+Pfw = 200; // Friction and Windage loss in Watts
+
+
+// CALCULATIONS
+
+R1dc = Vdc/Idc; // DC winding Resistance per phase in Ohms
+Rac = Wsc/(3*Isc^2); // AC Resistance from Locked rotor test at supply frequency
+Rac_red = Wsc_red/(3*Isc^2); // AC Resistance from Locked rotor test at reduced frequency
+R1ac = (Rac/Rac_red)*R1dc; // Corrected Value of AC stator winding Resistance in Ohms
+R2dc = Rac_red - R1dc; // Second rotor parameter, rotor resistance referred to stator is at low frequency in Ohms
+Zsc = Vsc/(sqrt(3)*Isc); // Per phase Impedance from locked rotor test at power frequency in Ohms
+Xs = sqrt((Zsc^2)-(Rac^2)); // Per phase leakage Reactance referred to stator in Ohms
+theta_0 = acosd(Wo/(Vo*Io*sqrt(3))); // No-load power factor angle in degree
+Im = Io*sind(theta_0); // Reactive component of no-load current in Amphere
+Xm = Vo/(Im*sqrt(3)); // Magnetizing Reactance in Ohms
+Pc = Wo - 3*Io^2*R1ac-Pfw; // Total Core loss in Watts
+Rc = (Vo/sqrt(3))^2*(3/Pc); // Per phase core loss Resistance in Watts
+
+
+// DISPLAY RESULTS
+
+disp(" SOLUTION :-");
+printf("\n (a) Magnetizing Reactance of Equivalent circuit, Xm = %.1f Ohms \n",Xm)
+printf("\n (b) Per phase core loss Resistance, Pc = %.f Ohms \n",Rc)
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