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Diffstat (limited to '3826/CH1/EX1.3/Ex1_3.sce')
| -rw-r--r-- | 3826/CH1/EX1.3/Ex1_3.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/3826/CH1/EX1.3/Ex1_3.sce b/3826/CH1/EX1.3/Ex1_3.sce new file mode 100644 index 000000000..451bab376 --- /dev/null +++ b/3826/CH1/EX1.3/Ex1_3.sce @@ -0,0 +1,21 @@ +//Example 1_3 page no:42
+clc;
+//given
+armature_resitance = 0.086//in ohm
+fl_arm_current = 150;
+volt = 220;
+power = 30;//in kiloWatt
+ini_brk_current = 200;
+full_ld_speed = 535;// in rev/min
+back_emf = volt - (fl_arm_current * armature_resitance);
+tot_volt = volt + back_emf;
+resistance_req = tot_volt / ini_brk_current;
+res_added = resistance_req - armature_resitance;
+disp(res_added,"the resistance to be added is (in ohm)");
+full_ld_torque = (power*1000*60)/(%pi*2*full_ld_speed);
+ini_brk_torque = full_ld_torque * ini_brk_current / fl_arm_current;
+back_emf = 208/2;//back emf at half speed
+current = (volt + back_emf)/resistance_req;
+ele_brk_torque = full_ld_torque * current / fl_arm_current;
+disp(ele_brk_torque,"Electric braking torque at half speed is (in Nm)");
+//the value vary slightly with textbook hence values are rounded off in text book
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