BRIDGE RECTIFIER

BRIDGE RECTIFIER:

 In replacement of full wave rectifier we use Full wave bridge rectifier for rectification, change AC to DC current. But the question is here why we replace full wave rectifier, because bridge rectifier is more reliable than full wave it provide quantity of DC current as output. Overall the phenomenon of working of bridge is likely as full wave.

CONSTRUCTION:

Bridge rectifier

DERIVATION:

          (1)     Vavg =Area/time =  2Vp /ㄫ

          (2)     Vpout = Vpsec – 1.4 where

            Vpsec = Number of turn * primary volt = ղ *Vpri

               If the primary voltage is given in rms then to find Vpri, multiply the rms value to 

              under root 2. same process goes for Vpsec

               Such as   Vpri = √2 *Vrms  

           (3)    PIV= Vpout + 0.7

NUMERIC =1

  Determine the peak output voltage for the bridge rectifier. Assuming the practical model. What PIV rating is required for the diodes? The transformer is specified to have a 12rms secondary voltage for the standard 120V across the primary.

Data:

                Vrms = 12V

                Vpout =?

Solution:

                Vpout = Vpsec – 1.4 where

                Vpsec =√2*12V 

                           = 16.97V

So

                 Vpout =16.97 -1.4

                            = 15.57V

And PIV required is

                  PIV = Vpout+ 0.7

                         = 15.57 + 0.7

                         = 16.2V

PEAK VOLTAGE:

                  P=V/I

            and I =P/V