Attenuate 200v ac to 5v dc/ac

[nup]

hello everyone,
my project is stand alone solar power system.
and i need to implement PID control on the inverter side for load regulation.
i am using a controller called dspace 1103.
the problem is i need to give the output voltage of the inverter as a feedback to the controller which will implement the pid control.
but it accepts a voltage range of only 10V. max.
so is there any way i can convert 200v output of inverter to 10v dc/ac input, with minimum losses.
don't wanna use a transformer.

 

[hamidmoallemi]

hi
I think you can use diode bridge rectifier and resistive voltage divider without a problem , for low losses uses higher range resistors (10k range )

 

[andrelux]

Hi,

Do you need some galvanic isolation between inverter output and DSP controller ?

 

[Pha5e]

Have a look at switched-mode power supply design. It uses an opto-isolator to provide safe isolation between the high and low voltage sections of the feedback circuit and is more efficient than a linear power supply. You will require a tiny high-frequency transformer.

 

[andrelux]

Hi Nup,

I am using a design close to your need for a industrial charger



Here his the LTSpice file if you want to change some parameters

 

[nup]

Thanks a lot for everyone replies.
yes an isolation will be good.
the opto isolater sounds a good method to provide the feed back.
thanks..

 

[naseerak]

A flyback supply will do it up to 150w