The efficiency(n) of fullwave rectifier is defined as: n=DC output Power/AC input power But Power=V*I n=Vdc*Idc/Vrms*Irms But Vdc=2Vm/pi,Idc=2Im/pi ,Irms=Im/root(2),Vrms=Vm/root(2) (Im:Peak Curent) n=(4Vm*Im/pi^2)/(Vm*Im/2)=8/pi^2=0.812=81.2%. So efficiency of full wave rectifier is 81.2%
A half wave rectifier basically throws away the negative half of the waveform. Full wave basically flips the negative part of the waveform to positive. From that standpoint you could say that full wave is twice as efficient.
The ratio of d.c power output to the applied input a.c power is known as rectifier efficiency .
Efficiency = (Vdc2/Rl)/(Vrms2/Rl) = (Vm/л)2/(Vm/2)2 = 0.406
Where Vm is the maximum voltage
maa chuda bhosdi wale
40.6%
81.2%
100
AC RMS Value x 1.414
centre tap transform convert ac into full wave rectifeir dc .It needs only two diodes but efficiency is less.
Half wave rectifier makes the the sinusoidal wave uni-direction only in one half cycle and leave the other but in full wave rectifier both the cycles are made uni-directional.
in full wave bridge rectifier, the input and out put voltages are same but in case of two diode rectifier the input and output voltages can be different as per requirement a there is a transformer in the circuit. The former is lighter and the later is heavier.
The output degrades to a half-wave rectifier.
Efficiency is double in case of full wave rectifier.
AC RMS Value x 1.414
1. Efficiency of full wave rectifier is better than other rectifiers i.e, Efficiency()=81.2%. 2.It's Peak Inverse voltage (P I V)=2Vm.
It is defined as dc power delivered to the load to the ac input power from secondary transformer
centre tap transform convert ac into full wave rectifeir dc .It needs only two diodes but efficiency is less.
"What is the functioning procedure of full wave rectifier by using SCRs?" "What is the functioning procedure of full wave rectifier by using SCRs?"
It depends on whether or not it is a half wave or full wave rectifier. For a single phase 60 Hz rectifier, a half wave rectifier will be 60 Hz while a full wave rectifier will be 120 Hz. A three phase full wave rectifier will be 360 Hz.
An open diode will result in no output from a half wave rectifier, and an open diode will cut the output of a full wave rectifier in half.
The Ripple factor for full-wave rectifier is given by: r= Iac/Idc = 0.482
Bridge Rectifier DiodesIn a "bridge" rectifier there is 4 diodes In a "full wave" there are 2 diodes.In a "half wave" rectifier there is 1 diode.
full wave rectifier, because in half wave rectifier only one p-n junction diode Ans 2. In full wave rectifier both negative & positive cycles are rectified , but , in half wave rectifier only the positive or the negative cycle is rectified . That's why full wave rectifier provides more power .
Half wave rectifier makes the the sinusoidal wave uni-direction only in one half cycle and leave the other but in full wave rectifier both the cycles are made uni-directional.