How can i design single phase voltage regulator?

[quadrophedia]

hi to all,
sorry if i'm in the wrong topic cuz i'm new to this..
i just want to ask..
can i design a buck-boost chopper that will convert the input voltage of 240vac to 230vac?

 

[IanP]

Another option is to use a transformer - if you need isolation, or autotransformer - if you don't care about isolation .. see attached picture ..

Rgds,
IanP

 

[quadrophedia]

thanks IanP,
anyway is there any other way which is not using the transformer?

 

[rongo024]

Make 240 volt to DC and then DC to 230. At this case transformer is also required (2 Pcs)

 

[FvM]

can i design a buck-boost chopper that will convert the input voltage of 240vac to 230vac?

Basically yes. Consider two H-bridge inverters (one for input and one for output) and a DC bus. That's the design for a bi-directional
converter with sine input and output, simplified implementations are possible.

Apart from a lot of power semiconductors and a complex control circuit, you need inductors at input and output and a DC bus capacitor.
But it works, and in some cases can be meaningful to avoid a bulky low-frequency transformer. It's more interesting for 50/60 Hz
frequency conversion.

Also a single phase VFD inverter does basically the same. Present products have mostly simple rectifier input circuits with non-sine input
current and aren't capable of energy recuperation.

 

[quadrophedia]

FvM thank you for your previous reply i really appreciate it.
i try design the circuit that u mention using the H-brigde.
but i cant get the output waveform that it sine wave like the input.
why is that happen?
sorry i'm still a student so i'm not good in design a circuit.