How To Make simple rectifier

Sounds like you need both a rectifier and a voltage regulator. Another option is a rectifier and a dc to dc converter, although 240 volts dc is quite high. What kind of current does this need to work at?

I'm not sure about the current because I'm in progres to start my project about induction generator. It's required to produce 240volts ac 50 Hz constant without consider any source changging at the input of induction generator (prime mover speed cause changging in voltage,frequency,current,etc).

The device need

*induction generator - produce variable ac voltage

*rectifier - convert ac from induction generator to dc

*inverter - convert again to constant 240 v ac from dc rectifier output

Is voltage regulator suitable for this project?

*induction generator - produce variable ac voltage

*rectifier - convert ac from induction generator to dc

*inverter - convert again to constant 240 v ac from dc rectifier output

These stages don't seem quite right to me.

This sort of thing isn't my field....but if I was going to do it this way it would be at the final inverter that I would aim to stabilise...or I'd provide feedback to the generator to try and get a constant output.

I'm sure the power eng guys here who will point you in the right direction

What you are proposing (insofar as I understand your objectives) involves far more than a "simple rectifier."

If you want a constant-frequency, constant voltage output from a device, use an inverter for the purpose.

Alternatively, if you want (for whatever reason) a constant-voltage, constant-frequency output from a generator (however implemented), you're talking about even more complexity.

Would describe in more detail exactly what your objectives are? And is this some sort of school project? Sounds like.

I'm having difficulty with the question, it appears you want an simple rectifier but want more out than you are putting in, which is all a a bit a contradiction.

240 DC is the equivalent of the 240V AC - RMS value which has a peak voltage of 339.36 volts

You do not get the DC equivalent voltage of the maximum peak AC voltage out of a simple rectifier.

pls use auto voltage regulter AVR in maket lot of brands was available.

"" (prime mover speed cause changging in voltage,frequency,current,etc)""

As far as I understand you are talking the Generator driven by a Prime-Mover of some Earth-moving device like Tractor, Showel or Ground-breaking-Drill not operating from Air but your Mover's engine.

As the load varies the throttle changes the RPM of Engine, so the Voltage & frequency of the generator.

Because the RPM of engine from idle to full throttle has a wide range, it is not a simple-rectifier-Regulator, but some Mechanical-modifications are also required, like Slip-clutch coupling to Generator which will narrow the variations for generator.

On Electrical/electronic side:

I suggest to have Battery-Bank, Charge it with generator output, run an inverter from battery-bank.