diff options
Diffstat (limited to '3472/CH44/EX44.5')
| -rw-r--r-- | 3472/CH44/EX44.5/Example44_5.sce | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/3472/CH44/EX44.5/Example44_5.sce b/3472/CH44/EX44.5/Example44_5.sce new file mode 100644 index 000000000..89faf730a --- /dev/null +++ b/3472/CH44/EX44.5/Example44_5.sce @@ -0,0 +1,60 @@ +// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 6: MOTORS FOR ELECTRIC TRACTION
+
+// EXAMPLE : 6.5 :
+// Page number 792-793
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+I_1 = 100.0 // Current(A)
+N_1 = 71.0 // Speed(kmph)
+F_t1 = 2225.0 // Tractive effort(N)
+I_2 = 150.0 // Current(A)
+N_2 = 57.0 // Speed(kmph)
+F_t2 = 6675.0 // Tractive effort(N)
+I_3 = 200.0 // Current(A)
+N_3 = 50.0 // Speed(kmph)
+F_t3 = 11600.0 // Tractive effort(N)
+I_4 = 250.0 // Current(A)
+N_4 = 45.0 // Speed(kmph)
+F_t4 = 17350.0 // Tractive effort(N)
+I_5 = 300.0 // Current(A)
+N_5 = 42.0 // Speed(kmph)
+F_t5 = 23200.0 // Tractive effort(N)
+D_A = 101.6 // Size of wheels(cm)
+ratio_gear = 72.0/23 // Gear ratio
+D_B = 106.7 // Size of wheels(cm)
+ratio_gear_new = 75.0/20 // Gear ratio
+
+// Calculations
+N_B = ratio_gear*D_B/(ratio_gear_new*D_A) // Speed in terms of V(kmph)
+F_tB = D_A*ratio_gear_new/(ratio_gear*D_B) // Tractive effort in terms of F_tA(N)
+N_B1 = N_B*N_1 // Speed(kmph)
+F_tB1 = F_tB*F_t1 // Tractive effort(N)
+N_B2 = N_B*N_2 // Speed(kmph)
+F_tB2 = F_tB*F_t2 // Tractive effort(N)
+N_B3 = N_B*N_3 // Speed(kmph)
+F_tB3 = F_tB*F_t3 // Tractive effort(N)
+N_B4 = N_B*N_4 // Speed(kmph)
+F_tB4 = F_tB*F_t4 // Tractive effort(N)
+N_B5 = N_B*N_5 // Speed(kmph)
+F_tB5 = F_tB*F_t5 // Tractive effort(N)
+
+// Results
+disp("PART IV - EXAMPLE : 6.5 : SOLUTION :-")
+printf("\nNew characteristics of motor")
+printf("\n_______________________________________")
+printf("\n Current(A) : Speed(kmph) : F_t(N)")
+printf("\n_______________________________________")
+printf("\n %.f : %.1f : %.f ", I_1,N_B1,F_tB1)
+printf("\n %.f : %.1f : %.f ", I_2,N_B2,F_tB2)
+printf("\n %.f : %.1f : %.f ", I_3,N_B3,F_tB3)
+printf("\n %.f : %.1f : %.f ", I_4,N_B4,F_tB4)
+printf("\n %.f : %.1f : %.f ", I_5,N_B5,F_tB5)
+printf("\n_______________________________________\n")
+printf("\nNOTE: Changes in the obtained answer from that of textbook is due to more precision here")
|