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| -rw-r--r-- | 3681/CH7/EX7.41/Ex7_41.sce | 35 |
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diff --git a/3681/CH7/EX7.41/Ans7_41.PNG b/3681/CH7/EX7.41/Ans7_41.PNG Binary files differnew file mode 100644 index 000000000..9ca2169b9 --- /dev/null +++ b/3681/CH7/EX7.41/Ans7_41.PNG diff --git a/3681/CH7/EX7.41/Ex7_41.sce b/3681/CH7/EX7.41/Ex7_41.sce new file mode 100644 index 000000000..98bc28ce9 --- /dev/null +++ b/3681/CH7/EX7.41/Ex7_41.sce @@ -0,0 +1,35 @@ +// Calculating the eddy current loss ratio and average loss ratio and critical depth for minimum loss
+clc;
+disp('Example 7.41, Page No. = 7.104')
+// Given Data
+Ws = 20;// Slot width (in mm)
+b = 14;// Width of copper conductors (in mm)
+h = 8;// Depth of copper conductors (in mm)
+f = 50// Frequency (in Hz)
+N = 5;// Number of layers
+// Calculation of eddy loss factor for different layers
+a = 100*(b/Ws)^(1/2);
+ah = a*h*10^(-3);
+ah4 = ah^(4);
+Ke1 = 1;// 1st layer
+Ke2 = 1+ah4*2*(2-1)/3;// 2nd layer
+Ke3 = 1+ah4*3*(3-1)/3;// 3rd layer
+Ke4 = 1+ah4*4*(4-1)/3;// 4th layer
+Ke5 = 1+ah4*5*(5-1)/3;// 5th layer
+disp(Ke1,'1st layer Ke1 =');
+disp(Ke2,'2nd layer Ke2 =');
+disp(Ke3,'3rd layer Ke3 =');
+disp(Ke4,'4th layer Ke4 =');
+disp(Ke5,'5th layer Ke5 =');
+// Calculation of average eddy current loss factor for all the five layers
+Ke_av = 1+ah4*N*N/9;
+disp(Ke_av,'Average eddy current loss factor for all the five layers =');
+// Calculation of critical depth for minimum loss
+hc = 1/(a*(3*N*N/9)^(1/4))*1000;// Critical depth (in mm)
+disp(hc,'Critical depth (mm)=');
+// Calculation of average eddy current loss factor for all the five layers for this critical depth
+ahc = a*hc*10^(-3);
+ahc4 = ahc^(4);
+Ke_av = 1+ahc4*N*N/9;
+disp(Ke_av,'Average eddy current loss factor for this critical depth=');
+//in book answers are 1, 1.13, 1.4, 1.8, 2.33, 1.55, 7 mm and 1.33 respectively. The answers vary due to round off error
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