Ok guys,
Thanks for your ideas.i have in my mind all of this but i was thinking for an ic. I'm programming pic's but i'm running out of time to design somethink like that. I made the supply but i'm not very satisfied. 2 channels 0-75V/5A, 1 channel -75-0V/5A, 1 channel 5V/5A. It is very complex and when i added current regulator some problem was occurred. i'll make something more simply. Sorry the bad english.
Thanks again for your ideas. When i'll make something about this i'll publish to you.