

Efficiency of single-phase center-tap full wave rectifier
The efficiency of single phase center-tap full-wave rectifier is given by the ratio of the output dc power to the total amount of input power supplied to the circuit. It is also called conventional efficiency.
Pin = IL2 (R0 + RL) = (ILM/√2)2 (R0 + RL) ½ ILM2(R0 + RL)
Pdc = IL(dc)2(R0 + RL) = (2ILM/ π)2 (R0 + RL) = 4ILM2/ π2 (R0 + RL)
Ƞ = Pdc/Pin = (8/ π2){RL /(R0 + RL)} = 0.812/(1 + R0 / RL) = 81.2%/(1 + R0 / RL)
Here,
IL = rms value of load current
ILM = maximum value of load current
IL(dc) =average value of load current
RL = load resistance
Rs = transformer secondary resistance
rd = diode forward resistance
R0 = Rs + rd
It is twice the value for the half-wave rectifier for the simple reason that a full-wave rectifier utilizes both half-cycles of the input ac supply.
Related topic
- Single-phase full-wave rectifier
- Average and RMS value of center-tap full wave rectifier
- Frequency Component of single-phase center-tap full wave rectifier
- Ripple Factor of single-phase center-tap full-wave rectifier
- Regulation of single-phase full-wave center-tap rectifier
- Peak Inverse Voltage of single-phase center-tap full-wave rectifier
- Peak Current of single-phase center-tap full-wave rectifier
- Transformer Utilization Factor (TUF) of single-phase center-tap full-wave rectifier
- Advantage of center-tap Full-wave rectifier