control output current and voltage in a complet wave rectife

[ze]

how can i control either the current and voltage DC?
does anyone have an electronic scheme???
there is a transfoirmer involved 230vAC/20vDC, that provides max 50A.
I must retain the current until it reaches 20V, so than i can elevate the current til the 50A. 8O

 

[tryagain]

Re: control output current and voltage in a complet wave rec

At first,I think you should supply more detail about application?
then,you can use PWM to control,and use two (tl431) to current and voltage control.