## Average and RMS Value of bridge rectifier

Let

V_{m }= maximum value of transformer secondary voltage

V_{s }=rms value of secondary voltage

V_{LM }=maximum value of load voltage = V_{sm }– diode drop – secondary resistance drop

V_{L }= rms value of load voltage

V_{L(ac) }= rms value of ac component in the output voltage

I_{L }= rms value of load current

V_{L(dc)} =average value of load voltage

I_{L(dc) }= average value of load current

I_{LM }= maximum value of load current

R_{L }= load resistance

R_{S }= transformer secondary resistance

r_{d }= diode forward resistance

**V _{L} = V_{LM}/√2 = 0.707 V_{LM};**

**V _{L(dc)} = 2V_{LM}/ π = 0.636 V**

**V _{L(ac)} = √(V_{L}^{2} – V_{L(dc)}^{2})**

Similarly,

**I _{LM} = V_{LM}/R_{L}; I_{L} = I_{LM}/√2 = 0.707 I_{LM}**

**I _{L(dc)} = 2I_{LM} / π = 0.636 I_{LM} ; I_{L(ac)} = √(I_{L}^{2} – I_{L(dc)}^{2})**

Incidentally, **I _{L(ac)}** is the same thing as

**I**

_{r(rms)}

### Related Topic

**Full-wave bridge rectifier****Efficiency 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**