The efficiency of single phase full-wave bridge 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.

Ƞ = DC power delivered to the load/AC input power from the transformer

   =P_dc/P_in

P_dc = I²_L(dc) R_L = (2I_L(dc)/ π) R_L = 0.636 I_LM R_L

P_in = I²_L­(ac)(R_L + R_F) = I²_L(dc) (R_L + R_F)/2

% Ƞ = 81.2/(1 + 2r_d/R­_L)

Here,

R_L = load resistance

r_d = diode forward resistance

R_F = R_s + r_d

I_L = rms value of load current

I_LM = maximum value of load current

I_L(dc) =average value of load current

Related Topic

1. Full-wave bridge rectifier
2. Average and RMS Value of bridge rectifier
3. Ripple Factor of bridge rectifier
4. Peak Inverse Voltage (PIV) of bridge rectifier
5. Peak Current of bridge rectifier
6. Transformer Utilization Factor of bridge rectifier
7. Advantage of bridge rectifier
8. Disadvantage of bridge rectifier