Sunday, August 24, 2014
Rectifier to convert AC to DC
What is rectifier:-
A device which converts Alternating Current to Direct Current, its schema is based on four diodes connected in such a way that they convert AC (alternating current ) to DC (Direct current).
How it works:-
First let me explain for newbies who dontt now about AC or DC, AC is an alternating current which changes its phase on every cycle, there are two cycles during first cycle amplitude of voltage is postive but during second cycle its amplitude is negative, number of cycle in a second is called frequency.
Usually frequency is about 50Hz but in some countries it is 60Hz, Ill explain you later on why frequency is 50Hz or 60Hz.
Now coming to DC a direct current, no change in phase, that is its frequency is 0Hz, its amplitude remain same through out its conductance
As i said its schema is based on diodes, let me first explain you what is diode?
diode is semiconductor device thats is use to allow current to flow in one direction, in simple words its act as a volue which allow current in one direction, it may be forward bised or in reverse biase, it allows current to flow in forward biased mode, and stops during reverse biased.Now there is another question what is forward biased or reverse biase, forward biase is a mode in which anode of diode is a high potential and cathode is a low potential, while in reverse biased cathode is a high potential and anode is a low potential they are opposite of each other.
Now coming back to my topic, rectified is based on four diodes, when we supply AC, diode allow current during positive cycle but during negative cycle diodes are connected in reversed condition connected in such a way that it allows negative cycle of current too, in this way whole cycle pass away through diodes, now it in DC form, but not pure DC there are some hormonics component of AC too, but dont worry they can be eliminated by using polar capacitor which removes ripples or hormonics coming out, in this way we get pure DC, to make it regulated power supply we can attack a regulator ic LM317 or 7809 and other regulator.
Uses:-
Mostly commonly it is used in as power supply for various appliances like Laptop charger, variable power supply and many other places.
A device which converts Alternating Current to Direct Current, its schema is based on four diodes connected in such a way that they convert AC (alternating current ) to DC (Direct current).
How it works:-
First let me explain for newbies who dontt now about AC or DC, AC is an alternating current which changes its phase on every cycle, there are two cycles during first cycle amplitude of voltage is postive but during second cycle its amplitude is negative, number of cycle in a second is called frequency.
Usually frequency is about 50Hz but in some countries it is 60Hz, Ill explain you later on why frequency is 50Hz or 60Hz.
Now coming to DC a direct current, no change in phase, that is its frequency is 0Hz, its amplitude remain same through out its conductanceAs i said its schema is based on diodes, let me first explain you what is diode?
diode is semiconductor device thats is use to allow current to flow in one direction, in simple words its act as a volue which allow current in one direction, it may be forward bised or in reverse biase, it allows current to flow in forward biased mode, and stops during reverse biased.Now there is another question what is forward biased or reverse biase, forward biase is a mode in which anode of diode is a high potential and cathode is a low potential, while in reverse biased cathode is a high potential and anode is a low potential they are opposite of each other.
Uses:-
Mostly commonly it is used in as power supply for various appliances like Laptop charger, variable power supply and many other places.
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