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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3472/CH39/EX39.5 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3472/CH39/EX39.5')
| -rw-r--r-- | 3472/CH39/EX39.5/Example39_5.sce | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/3472/CH39/EX39.5/Example39_5.sce b/3472/CH39/EX39.5/Example39_5.sce new file mode 100644 index 000000000..5fc531d9c --- /dev/null +++ b/3472/CH39/EX39.5/Example39_5.sce @@ -0,0 +1,35 @@ +// 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 1: INDUSTRIAL APPLICATIONS OF ELECTRIC MOTORS
+
+// EXAMPLE : 1.5 :
+// Page number 682
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+V = 400.0 // IM voltage(V)
+f = 50.0 // Frequency(Hz)
+I_s = 5.0 // Full voltage starting current in terms of full load current
+T_s = 2.0 // Full voltage starting torque in terms of full load torque
+tap = 65.0 // Auto-tranformer tapping(%)
+
+// Calculations
+V_ph = V/3**0.5 // Phase voltage(V)
+V_ph_motor = tap/100*V_ph // Motor phase voltage when auto-transformer is used(V)
+I_ph_motor = tap/100*I_s // Motor phase current in terms of full load current
+I_1 = tap/100*I_ph_motor // Line current from supply in terms of full load current
+T = (tap/100)**2*T_s // Starting torque in terms of full load current
+V_applied = V_ph/2**0.5 // Voltage to be applied to develop full-load torque(V)
+I_line = V_applied/V_ph*I_s // Line current in terms of full load current
+
+// Results
+disp("PART IV - EXAMPLE : 1.5 : SOLUTION :-")
+printf("\nCase(i): Motor current per phase = %.2f*I_fl ", I_ph_motor)
+printf("\nCase(ii): Current from the supply, I_1 = %.2f*I_fl ", I_1)
+printf("\nCase(iii): Starting torque with auto-transformer starter, T = %.3f*T_fl ", T)
+printf("\nVoltage to be applied if motor has to develop full-load torque at starting, V = %.f V", V_applied)
+printf("\nLine current from the supply to develop full-load torque at starting = %.2f*I_fl ", I_line)
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