diff options
Diffstat (limited to '3760/CH4/EX4.35/Ex4_35.sce')
| -rw-r--r-- | 3760/CH4/EX4.35/Ex4_35.sce | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/3760/CH4/EX4.35/Ex4_35.sce b/3760/CH4/EX4.35/Ex4_35.sce new file mode 100644 index 000000000..d3e359167 --- /dev/null +++ b/3760/CH4/EX4.35/Ex4_35.sce @@ -0,0 +1,27 @@ +clc;
+V=230;//supply current
+Pout=15000;//output voltage
+Ra=0.2;//armature circuit resistance
+Rse=0.1;//resistance of series field winding
+Nf=1000;//shunt field turns per pole
+//Data for magnetization curve at 1500 rpm
+If_=[0 0.2 0.4 0.6 0.8 1.02 1.15 1.32 1.56 1.92 2.4];//field current at 1500 rpm
+Ea=[6 40 80 120 160 200 220 240 260 280 300];//counter emf at 1500 rpm and respective field current
+plot(If_,Ea);//Magnetization curve at 1500 rpm
+Ia_1=4;//armature current at rated voltage and rated load
+Ia_2=70;//armature current at 1200rpm
+
+//At no load
+Ea_=V-Ia_1*Ra;//counter emf
+//field current required for Ea_(ie.229.2 V),from O.C.C. is 1.23 A.
+
+//At load
+Ea__=V-Ia_2*(Ra+Rse);//counter emf at 1200 rpm
+Ea___=209*(1500/1200);//Ea at speed of 1500 rpm
+//Field current corresponding to Ea___(ie.261.25 V),from O.C.C. is 1.575 A.
+//Total D-axis mmf per pole=Nf*If+Ns*Is
+If=1.23;//field current at 229.2 V is 1.23 A
+If1=1.23;//field current at 261.25 V is 1.575 A
+//1.575*1000=1.23*1000+Ns*(70)
+Ns=(0.345*1000)/70;//series field turns
+printf('For long-shunt connection, series field turns is equal to %f.',round(Ns));
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