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Diffstat (limited to '3681/CH3/EX3.2')
| -rw-r--r-- | 3681/CH3/EX3.2/Ans3_2.PNG | bin | 0 -> 4767 bytes | |||
| -rw-r--r-- | 3681/CH3/EX3.2/Ex3_2.sce | 22 |
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diff --git a/3681/CH3/EX3.2/Ans3_2.PNG b/3681/CH3/EX3.2/Ans3_2.PNG Binary files differnew file mode 100644 index 000000000..250a98a07 --- /dev/null +++ b/3681/CH3/EX3.2/Ans3_2.PNG diff --git a/3681/CH3/EX3.2/Ex3_2.sce b/3681/CH3/EX3.2/Ex3_2.sce new file mode 100644 index 000000000..7b462963a --- /dev/null +++ b/3681/CH3/EX3.2/Ex3_2.sce @@ -0,0 +1,22 @@ +// Calculating the mmf required for the air gap of a machine
+clc;
+disp('Example 3.2, Page No. = 3.12')
+// Given Data
+L = 0.32;// Core length in meter
+nd = 4;// Number of ducts
+Wd = 10;// Duct width in mm
+Pa = 0.19;// Pole arc in meter
+ys=65.4;//Slot Pitch in mm
+lg = 5;// Length of air gap in mm
+Wo = 5;// Slot opening in mm
+Fpp = 52;// Flux per pole in mWb
+Kcs = 0.18;//Carter's co-efficient for slots
+Kcd = 0.28;//Carter's co-efficient for ducts
+// Calculation of mmf required for the air gap
+Kgs=ys/(ys-(Kcs*Wo));//Gap contraction for slots
+Kgd=L/(L-(Kcd*nd*Wd*10^(-3)));//Gap contraction for ducts
+Kg=Kgs*Kgd;//Total gap contracion factor
+Bg=Fpp*10^(-3)/(Pa*L);//Flux density at the centre of pole in Wb per meter square
+ATg=800000*Kg*Bg*lg*10^(-3);//mmf required for air gap in A
+disp(ATg,'mmf required for air gap(A)=');
+//in book answer is 3587 A. The answers vary due to round off error
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