diff options
Diffstat (limited to '3784/CH4/EX4.12/Ex4_12.sce')
| -rw-r--r-- | 3784/CH4/EX4.12/Ex4_12.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/3784/CH4/EX4.12/Ex4_12.sce b/3784/CH4/EX4.12/Ex4_12.sce new file mode 100644 index 000000000..10bb78ca1 --- /dev/null +++ b/3784/CH4/EX4.12/Ex4_12.sce @@ -0,0 +1,24 @@ +clc
+//Variable Initialisation
+V=440//Input Voltage of motor in volts
+Rf=100//Field resistance in ohm
+Il=50//Load Current in Ampere
+N1=900//Rated Speed of Motor in rpm
+N2=300//Rated Speed of Motor in rpm
+N3=400//Rated Speed of Motor in rpm
+N4=600//Rated Speed of Motor in rpm
+Ra=0.3//Armature resistance in ohm
+ton=4e-3//On period of Chopper in sec
+//Solution
+If=V/Rf//Motor Field Current in Amp
+Ia=Il-If//Armature Current in Amp
+Eb1=V-(Ia*Ra)//Back EMF of Motor
+Eb2=(N2/N3)*Eb1
+V2=Eb2+(Ia*Ra)//Required Terminal Voltage in volts
+T1=(V/V2)*ton//Chopping Period
+f1=1/T1///Chopping Period
+Eb3=(N4/N1)*Eb1//Back Emf at 600 rpm
+V3=Eb3+(Ia*Ra)//Required Terminal Voltage in volts
+T2=(V/V3)*ton//Chopping Period
+f2=1/T2//Chopping Period
+printf('\n\n Frequency of chopper=%0.1f Hz\n\n',f2)
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