RECTIFIERS

the rectifiers are mainly used for rectifying the ac power suppy and it will give a voltage or current that will be in an dc form . These rectifiers are mainly used in almost all electrical devices which needs dc input power supply . The invension of diodes made a big change in the rectification circuits .the diodes mainly used for the rectifiers are rectifier diodes .  There are mainly 3 types of rectifiers .
1) Half wave rectifier
2) center tapped full wave rectifier
3) Bridge rectifier

Half wave rectifier

This is a type of rectifier in which it consist of only one diode . The diode in the circuit acts like a switch . and it will only conduct +ve half cycle or -ve half cycle as per the diode is biased . So that the half wave rectifier only rectifies the one half cycle . so the frequency of the signal remains same . and the diode is connected to a load resistor so that we can take the out put across the resistors .

 

 

Centere tapped rectifier

For this type of rectifier construction we want a center tapped transformer. So that the central terminal in the output side act as a 0 potential . The other two terminal is connected to two diodes and it is connected to a load resistor . The flow of current through the resistor from the two diodes will be in the same direction . The two dides help to rectify the +ve and -ve half cycles .The out put frequency will be twice that of the input frequency .

 

 

Bridge rectifier

It consist of 4 diodes . In this type of rectifiers in one half cycle two diodes will be in forward biase and in the the other half cycle the other two diodes will be in forward biased . And a load resistor is used to take the out put . The out put frequency will be twice that of the input frequency .

 

 

 

 

 

The rectified out put will not be a pure dc there may be some ripples these ripples can be avoided by connecting a filtering circuit in the output side of the rectifiers . And in order to regulate the voltage a voltage regulator which is made of zener diode is placed

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