initial commit / add all books

1 files changed, 35 insertions, 0 deletions

diff --git a/3835/CH3/EX3.7/Ex3_7.sce b/3835/CH3/EX3.7/Ex3_7.sce
new file mode 100644
index 000000000..5d2fa0d55
--- /dev/null
+++ b/3835/CH3/EX3.7/Ex3_7.sce
@@ -0,0 +1,35 @@
+clear
+//
+//given
+fluxa=1.4*10**-3
+area=0.002
+B=fluxa/area  //flux density in air gap 
+printf("\n B= %0.3f  Wb/m**2",B)
+//u1=4*3.14*10**-7
+//ha=B/u1 in AT/m    //magnetic field in air gap
+ha=55.7
+la=2  //length of air gap in m
+mmf=ha*la  //mmf of air gap
+printf("\n mmf= %0.3f  AT",mmf)
+//since the flux density of central limb is 0.7 the corresponding field srength is h1=250AT/m
+h1=250
+mmfl=112.45  //mmf for magnetic central limb-->mmf=250*(450-0.2)*10**-3
+totmmf=mmf+mmfl
+printf("\n totmmf= %0.5f  AT",totmmf)
+//mean length of core CGHF=0.75m
+ml=0.75 //as above
+//since the central limb and magnetic core are in parallel they have same mmf that is 223.86AT
+h2=totmmf/ml //magnetic intensity in CGHF
+printf("\n h2= %0.5f  AT",h2)
+flux2=B*area  
+printf("\n flux2= %0.5f  Wb",flux2)
+totflux=fluxa+flux2  //Wb
+Bfabc=totflux/area   //flux density in magnetic core fabc in Wb/m**2
+H=3000 //AT/m
+totmmffabc=H*ml  //total mmf in fabc in AT
+printf("\n total mmf in fabc= %0.5f  Wb/m**2",totmmffabc)
+totmmfm=totmmffabc+totmmf  //total mmf in magnetic core in AT
+printf("\n totmmfm= %0.5f  AT",totmmfm)
+N=500
+I=totmmfm/N   //The required current to set up flux in air gap
+printf("\n The total current required to set up flux in air gap is= %0.5f  A",I)