diff options
Diffstat (limited to '3760/CH4/EX4.9/Ex4_9.sce')
| -rw-r--r-- | 3760/CH4/EX4.9/Ex4_9.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3760/CH4/EX4.9/Ex4_9.sce b/3760/CH4/EX4.9/Ex4_9.sce new file mode 100644 index 000000000..6a46c5607 --- /dev/null +++ b/3760/CH4/EX4.9/Ex4_9.sce @@ -0,0 +1,22 @@ +clc;
+A=2;//No of parallel paths for armature conductors
+P=6;//No. of poles
+If=2;//Field current
+Il=148;//Line current
+Ia=If+Il;//Armature current
+Z=480;//No of conductors
+//brushes on GNA, theta=0
+ATd1=0//demagnetizing ampere turns
+ATc1=((Ia*Z)/(2*A*P))//Cross magnetizing ampere turns
+printf('When brushes are on GNA the demagnetizing ampere turns & Cross magnetizing ampere turns are equal to %f & %f ATs/pole respectively.\n',ATd1,ATc1);
+//brushes are shifted from GNA by 5 degrees electrical, theta=5
+theta=5;
+ATd2=((2*theta*Ia*Z)/(180*2*A*P))//demagnetizing ampere turns
+ATc2=3000-ATd2;//Cross magnetizing ampere turns
+printf('When the brushes are shifted from GNA by 5 degrees electrical the demagnetizing ampere turns & Cross magnetizing ampere turns are equal to %f & %f ATs/pole respectively.\n',ATd2,ATc2);
+//brushes are shifted from GNA by 5 degrees mechanical, theta_m=5
+theta_m=5;//mechanical angle
+theta_e=(P/2)*theta_m;//electrical angle
+ATd3=((2*theta_e*Ia*Z)/(180*2*A*P))//demagnetizing ampere turns
+ATc3=3000-ATd3;//Cross magnetizing ampere turns
+printf('When the brushes are shifted from GNA by 5 degrees mechnical the demagnetizing ampere turns & Cross magnetizing ampere turns are equal to %f & %f ATs/pole respectively',ATd3,ATc3);
|