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Diffstat (limited to '371/CH11/EX11.4/11_4.sci')
| -rwxr-xr-x | 371/CH11/EX11.4/11_4.sci | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/371/CH11/EX11.4/11_4.sci b/371/CH11/EX11.4/11_4.sci new file mode 100755 index 000000000..786293f65 --- /dev/null +++ b/371/CH11/EX11.4/11_4.sci @@ -0,0 +1,38 @@ +//Control of DC motors// +//Example 11.4// +Edca1=1.15*440;//Rated output voltage from the converter for rated speed of750rpm// +printf('Rated output voltage from the converter=Edca1=%fvolts',Edca1); +N1=750; +N2=500; +Edca2=Edca1*N2/N1; +E2=415; +C2=Edca2/(1.35*E2); +printf('\nCosine of the triggering angle=C2=%f',C2); +A2=C2*180/%pi; +printf('\nTriggering angle=A2=%fdegrees',A2); +PF2=C2*(1+cos(15*%pi/180))/2; +printf('\nPowerfactor=PF2=%f',PF2); +Id=200;//dc current in amps// +I2=0.75*0.817*Id;//Current at 75percent load in amps// +RP2=sqrt(3)*E2*I2*sqrt(1-PF2^2)/1000;//Reactive power drawn at 75% load// +printf('\nReactive power at 75percent load=RP2=%fKVAR',RP2); +h=6; +Wv=24.17;//maximum voltage ripple in percent// +Wi=8;//maximum permissible current ripple in percent// +I6=Wi*Id/100; +printf('\nSixth harmonic ripple current=I6=%fAmps',I6); +W=314; +L=(Wv*Edca1*10)/(I6*h*W); +printf('\nInductance required in dc circuit=L=%fmH',L); +C1=Edca1/(1.35*E2); +printf('\nCosine of the triggering angle=C1=%f',C1); +A1=C1*180/%pi; +printf('\nTriggering angle=A1=%fdegrees',A1); +PF1=C1*(1+cos(15*%pi/180))/2; +printf('\nPowerfactor=PF1=%f',PF1); +I1=0.817*Id;//Current at 75percent load in amps// +RP1=sqrt(3)*E2*I1*sqrt(1-PF1^2)/1000;//Reactive power drawn at 75% load// +printf('\nReactive power at 75percent load=RP1=%fKVAR',RP1); + + + |