diff options
Diffstat (limited to '1938/CH2/EX2.40')
| -rwxr-xr-x | 1938/CH2/EX2.40/2_40.sce | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/1938/CH2/EX2.40/2_40.sce b/1938/CH2/EX2.40/2_40.sce new file mode 100755 index 000000000..8cc809d33 --- /dev/null +++ b/1938/CH2/EX2.40/2_40.sce @@ -0,0 +1,20 @@ +clc,clear
+printf('Example 2.40\n\n')
+
+V=230, I_a1=30
+R_a=0.4,R_x=1.1//armature resistance and extra resistance
+N_1=500
+
+//part(i)
+E_b1= V - I_a1*R_a
+I_a2 = I_a1 //I_a is constant as T, phi are constant
+E_b2= V - I_a2*(R_a+R_x)
+N_2 = N_1 *(E_b2/E_b1) //Because N (prop.) E_b/phi (prop.) E_b
+printf('(i)Speed at full load torque = %.3f r.p.m\n',N_2)
+
+//part(ii)
+T2_by_T1=1.5
+I_a2= I_a1 * T2_by_T1
+E_b2= V - I_a2*(R_a+R_x)
+N_2 = N_1 *(E_b2/E_b1) //Because N (prop.) E_b/phi (prop.) E_b
+printf('(ii)Speed at 1.5 times full load torque = %.3f r.p.m\n',N_2)
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