diff options
Diffstat (limited to '1938/CH2/EX2.28/2_28.sce')
| -rwxr-xr-x | 1938/CH2/EX2.28/2_28.sce | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/1938/CH2/EX2.28/2_28.sce b/1938/CH2/EX2.28/2_28.sce new file mode 100755 index 000000000..5fbf05e07 --- /dev/null +++ b/1938/CH2/EX2.28/2_28.sce @@ -0,0 +1,16 @@ +clc,clear
+printf('Example 2.28\n\n')
+
+V=250,N_0=1000,I_0=5
+R_a=0.2,R_sh=250 //armature and shunt field resistance
+I_L=50 //on no load
+I_sh=V / R_sh
+I_a0 = I_0 - I_sh
+I_a = I_L - I_sh
+E_b0 = V- I_a0*R_a
+E_b1 = V- I_a *R_a
+
+phi1_by_phi0 =1-(3/100) //weakens by 3 percent
+//N (prop.) E_b/phi
+N_1 = N_0 *(E_b1/E_b0) /phi1_by_phi0
+printf('Speed when loaded and drawing 50A current is %.3f r.p.m',N_1)
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