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Diffstat (limited to '3802/CH10/EX10.3/Ex10_3.sce')
-rw-r--r-- | 3802/CH10/EX10.3/Ex10_3.sce | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/3802/CH10/EX10.3/Ex10_3.sce b/3802/CH10/EX10.3/Ex10_3.sce new file mode 100644 index 000000000..42c1ca674 --- /dev/null +++ b/3802/CH10/EX10.3/Ex10_3.sce @@ -0,0 +1,41 @@ +//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex10_3.sce
+
+clc;
+clear;
+Pin=40; // power in kW
+Ps=1.5; // power in kW
+Ns=100; //speed percentage value
+N=40; //speed percentage value
+power_loss=0.8; // power in kW
+
+printf("\n (a)")
+rotor_input_power=Pin-Ps;
+s=0.04;
+rotor_copper_loss=s*rotor_input_power;
+mec_power_developed=rotor_input_power-rotor_copper_loss;
+printf("\n Mechanical power developed by the rotor=%2.2f kW",mec_power_developed)
+printf("\n Rotor copper loss=%2.2f kW \n",rotor_copper_loss)
+
+printf("\n (b)")
+motor_output_power=mec_power_developed-power_loss;
+printf("\n Output of the motor=%2.2f kW \n",motor_output_power)
+
+printf("\n (c)")
+motor_efficiency=(motor_output_power/Pin)*100;
+printf("\n The motor efficiency=%2.1f percentage \n",motor_efficiency)
+
+printf("\n (d)")
+new_slip=(Ns-N)/Ns;
+total_rotor_copper_loss=new_slip*rotor_input_power;
+printf("\n Total rotor copper loss when speed reduced to 40percentage of synchronous speed=%2.1f kW \n",total_rotor_copper_loss)
+
+printf("\n (e)")
+total_rotor_loss=total_rotor_copper_loss+power_loss;
+motor_output_power=rotor_input_power-total_rotor_loss;
+motor_efficiency=(motor_output_power/Pin)*100;
+printf("\n Efficiency of motor when speed reduced to 40percentage of synchronous speed=%2.1f percentage",motor_efficiency)
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