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Diffstat (limited to '1529/CH21/EX21.18/21_18.sce')
| -rwxr-xr-x | 1529/CH21/EX21.18/21_18.sce | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/1529/CH21/EX21.18/21_18.sce b/1529/CH21/EX21.18/21_18.sce new file mode 100755 index 000000000..db8ed5185 --- /dev/null +++ b/1529/CH21/EX21.18/21_18.sce @@ -0,0 +1,11 @@ +//Chapter 21, Problem 18
+clc;
+vi=200e3; //rated transformer
+pf=0.85; //power factor
+lcu=(1/2)^2*1.5e3; //copper loss
+lfe=1e3; //iron loss
+p0=(1/2)*vi*pf; //full-load output power
+lt=lcu+lfe; //total losses
+pi=p0+lt; //input power
+Ef=(1-(lt/pi)); //efficiency
+printf("Transformer efficiency at half load = %.3f percent",Ef*100);
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