diff options
Diffstat (limited to '1938/CH2/EX2.7/2_7.sce')
| -rwxr-xr-x | 1938/CH2/EX2.7/2_7.sce | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/1938/CH2/EX2.7/2_7.sce b/1938/CH2/EX2.7/2_7.sce new file mode 100755 index 000000000..ccf6fbd2a --- /dev/null +++ b/1938/CH2/EX2.7/2_7.sce @@ -0,0 +1,19 @@ +clc,clear
+printf('Example 2.7\n\n')
+
+V=220,R_a=0.3,R_sh=110 //resistance of armature and shunt field winding
+//no load
+N_0=1000 //no load speed in r.p.m
+I_L0 =6 //line current on no load
+I_sh= V/R_sh //no load shnt current
+I_a0 = I_L0 - I_sh //no load armature current
+E_b0= V - I_a0*R_a //no load induced emf
+
+//full load
+I_sh_FL= V/R_sh
+I_L_FL=50 //line current at full load
+I_a_FL= I_L_FL - I_sh_FL//full load armature current
+E_b_FL= V - I_a_FL * R_a //full load induced emf
+//using speed equation, as treating phi as constant
+N_FL=N_0 * (E_b_FL/E_b0)
+printf('Speed on full load is %.2f r.p.m',N_FL)
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