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+//scilab 5.4.1

+//Windows 7 operating system

+//chapter 6 Diode Circuits

+clc

+clear

+//For a full wave rectifier 

+//L-type LC filter

+f=50//f=line frequency in Hz

+w=2*%pi*f

+Vdc=10//Vdc=dc output voltage

+Idc=100*10^-3//Idc=load current in Amperes

+y=0.02//y=allowable ripple factor

+//y=sqrt(2)/(12*(w^2)*L*C)

+//Let L*C=a...............(1)

+a=sqrt(2)/(y*12*(w^2))

+RL=Vdc/Idc//RL=load resistance

+//Lc=critical inductance 

+//Lc=RL/(3*w)

+//For line frequency of 50Hz,Lc=RL/(300*%pi)

+//Lc=RL/950

+Lc=RL/950

+format("v",4)

+L=0.1//Assumed inductance in henry

+C=a/L//C=capacitance calculated from equation (1)

+format("v",4)

+L1=1//Assumed inductance in henry

+C1=a/L1//C1=capacitance calculated from equation (1)

+format("v",4)

+Rb=950*L1//Rb=bleeder resistance for good voltage regulation

+disp("The designed values of the components for a full wave rectifier with L-type LC filter are")

+disp("ohm",RL,"The load resistance RL is =")

+disp("H",Lc,"The critical inductance Lc is =")

+disp("H",L,"The inductance L is=")

+disp("µF",C/10^-6,"The capacitance C is")//C is converted in terms of microfarad

+//In textbook 957µF is approximately taken as 600µF

+disp("H",L1,"But if the inductance L designed is of the value =")

+disp("µF",C1/10^-6,"the capacitance C will be of the value =")//C1 is converted in terms of microfarad

+disp("So,a standard value of 50µF can be used in practice")

+disp("ohm",Rb,"The bleeder resistance Rb for good voltage regulation is=")

+disp("As Rb is much greater than RL,little power is wasted in Rb.This reflects the advantage of selecting L>Lc")

+

+