Rectifier - Electrical C & V

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19 February 2020

Rectifier

What is Rectifier?

 A Rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in one direction. The process is knows as Rectification.

Rectifier - Rectifier is an electronic device that works to convert AC current to DC current. Rectifier is used wherever we have to change AC to DC voltage.


Type of Rectifier


1. Half Wave Rectifier

When voltage is given by the transformer on the rectifier, it is both positive and negative cycle but it only allows Positive Half Cycles to go forward due to rectifier diode. And stops the negative Half Cycles.






Because the diode Half-positive Cycle fitted in the rectifier will be in the Forward Bias position and will pass that Cycle. But as soon as the Half Negative Cycle arrives on the diode it will enter the Reverse Bias position and will not pass that Half Negative Cycle.


2. Full Wave Rectifier




Full wave rectifiers are further divided into two categories.
1. Center Tapped Full Wave Rectifier
2. Full Wave Bridge Rectifier

1. Center Tapped full wave rectifier

Ac voltage is given at the primary winding of the transformer. And on the second binding of the transformer, the diode is connected. Because one diode in Half Wave Rectifier was able to rectify only Half Cycle, the second diode is placed here to rectify the other Half Cycle. So when diode D1 Forward If the Bias is in position then it will let the current go forward and at that time the diode D2 will be in the Reverse Biased position and it will not allow the current to go forward.
So this is how Half Cycle Rectify becomes. And when the diode D2 is in the Forward Bias position, it will allow the current to go forward and at that time the diode D1 will be in the Reverse Biased position and it will not allow the current to go forward. So in this way the second Half Cycle also becomes rectify and we get Full Wave in the output due to both diodes.
But the rectified output is not pure by this, and Dc Component is used to purify it.


2. Full wave bridge rectifier


In a bridge rectifier, the diode is made as a bridge and is used for Full Wave Rectification and it is very cheap and hence it is used in many electronics equipment.









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