rectifier

[subair]

from 230v,50hz supply to set up a fullwave rectifier at regulated voltage at 6v and vcalculate ripple factor at 100ma.with design of capctor and resistor

 

[MrAl]

Hi,

Do you mean you have a transformer that steps 230v down to 6v ?

 

[alphacat]

I believe its a step-down transformer from 230Vrms to 4.24Vrms (in order to reach 6Vdc).

 

[Boncuk]

I believe its a step-down transformer from 230Vrms to 4.24Vrms (in order to reach 6Vdc).

Nothing left to regulate (stabilize) for 6V.

 

[alphacat]

What do you mean?
The output of a transformer is an AC signal.

 

[mneary]

4.24Vrms is 6V peak. After a full wave rectifier, it's around 4.5V unregulated depending on rectifier and load.

Requirement is a 'regulated' 6V.

 

[jeryruse]

Well,
it would mean that the output be an a.c signal. So if the
resistance get increased then it would work.

 

[Gaston]

mabey he is trying to rectify 230v to dc and use a dropping resistor to achieve 6v

 

[johno_71]

I am trying to do the same thing...any thoughts?

 

[Gary B]

Johno_71: As homework or as a project?

If a project, the output voltage of the transformer at the maximum current load has to be at least one forward biased junction drop above the desired output voltage for a series regulator. The maximum can be anything higher. If you are looking at large voltage differential, a phase control pre-regulator is in order followed by a standard series regulator. I find analog regulators easier to design and digital more efficient but, it requires more filtering and will usually need a slow start circuit to get the caps up to voltage.