What is Voltage regulation? & What is the need of regulation?Give me a brief idea.

 

Any voltage source has a certain internal resistance.

This means that as more and more current is drawn form it the output voltage will drop.

Voltage regulation is a measure of this and is defined for a particular current as

( Off-load voltage - On-load-voltage )x100 / Off-load voltage .

It is thus expressed as a percentage.

So the voltage regulation for a transformer that reads 24 volts offload and 20 volts at 2 amps is

(24-20) x100/24 % ie 17%

 

You use a voltage regulator to compensate for changes in the input voltage, and load current. A voltage regulator is an "real world" approximation to an ideal voltage source. An ideal voltage source has zero output resistance and may source an infinite magnitude of current. Such a device is only theoretical. A very typical voltage regulator is the LM7805. It give a constant 5 volt output. As long as some values like input voltage and output current is inside the circuit specification.

 

What is Voltage regulation? & What is the need of regulation?Give me a brief idea.

Both of these questions are very broadly cast. Is there a type of voltage regulation in which you are specifically interested?

hgmjr

 

What is Voltage regulation? & What is the need of regulation?Give me a brief idea.

It's official definition is how much the source voltage changes when the load current is varied from no load to full load. It is usually specified as %VOUT/A.