1 files changed, 26 insertions, 0 deletions
diff --git a/3835/CH9/EX9.8/Ex9_8.sce b/3835/CH9/EX9.8/Ex9_8.sce
new file mode 100644
index 000000000..b5e6ba3f0
--- /dev/null
+++ b/3835/CH9/EX9.8/Ex9_8.sce
@@ -0,0 +1,26 @@
+clear
+//
+//given
+i=35
+v=220
+ra=0.15
+n1=1600
+//when motor is running at 1200rpm the back emf eb1 is given by eb1=v-(35*0.15)
+eb1=214.75
+//flux phy1 is proportional to armature current ia.Thus, at ia1=35 and ia2=15 n is proportional to eb/phy
+//2=(eb2*phy1)/(phy2*eb1)
+//therefore
+eb2=184.07
+//case a
+//resistance to be connected in series is rse ohm
+ia2=15
+rse=((v-eb2)/ia2)-ra
+printf("\n rse= %0.1f  ohm",rse)
+//case b
+eb2=0.5*1.15*214.75
+ia2=50
+rse=((v-eb2)/ia2)-ra
+phy1=35
+eb2=220-50*0.15
+n2=(n1*eb2*phy1)/(1.15*phy1*eb1)
+printf("\n n2= %0.1f  rpm",n2)