## Efficiency of bridge rectifier

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} = I^{2}_{L(dc)} R_{L} = (2I_{L(dc)}/ π) R_{L} = 0.636 I_{LM} R_{L}**

**P _{in} = I^{2}_{L(ac)}(R_{L} + R_{F}) = I^{2}_{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

**Full-wave bridge rectifier****Average and RMS Value of bridge rectifier****Ripple Factor of bridge rectifier****Peak Inverse Voltage (PIV) of bridge rectifier****Peak Current of bridge rectifier****Transformer Utilization Factor of bridge rectifier****Advantage of bridge rectifier****Disadvantage of bridge rectifier**