diff options
Diffstat (limited to '3760/CH1/EX1.26/Ex1_26.sce')
| -rw-r--r-- | 3760/CH1/EX1.26/Ex1_26.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3760/CH1/EX1.26/Ex1_26.sce b/3760/CH1/EX1.26/Ex1_26.sce new file mode 100644 index 000000000..957f6cb13 --- /dev/null +++ b/3760/CH1/EX1.26/Ex1_26.sce @@ -0,0 +1,22 @@ +clc;
+// subscripts 1 and 2 are used to refer 50 hz and 60 hz quantity respectively
+// voltage and current is same for both the cases
+s=1.6; // Steinmetz's coefficient
+poh1=1.6; // percentage ohmic losses
+ph1=0.9; // percentage hysteresis losses
+pe1=0.6; // percentage eddy current losses
+f1=50; // frequency in hertz
+f2=60; // frequency in hertz
+B=f1/f2 // since voltage level are same for both cases ratio of flux densities i.e Bm2/Bm1=f1/f2
+ph2=ph1*(f2/f1)*B^s; // percentage hysteresis losses
+pe2=pe1*(f2/f1)^2*B^2; // percentage eddy current losses
+poh2=poh1; // since the voltage and current levels are same therefore ohmic losses are same
+// for the total losses to be remain same at both the frequencies only ohmic losses can be varied
+p=poh1+ph1+pe1; // total losses at 50 hz
+pc=ph2+pe2; // total core losses at 60 hz
+pnoh=p-pc; // permissible value for new ohmic losses
+x=sqrt(pnoh/poh1); // factor by which output at 50 hz should be multiplied to get the same output at 60 hz
+printf('ohmic losses at 60 hz is %f percent\n',poh2);
+printf('hysteresis losses at 60 hz is %f percent\n',ph2);
+printf('eddy current losses at 60 hz is %f percent\n',pe2);
+printf('factor by which output at 50 hz should be multiplied to get the same output at 60 hz is %f ',x);
|