500 amp speed controllers
Moderators: BeligerAnt, petec, administrator
-
- Posts: 339
- Joined: Sat Oct 20, 2007 7:20 pm
- Location: worthing/ west Sussex
500 amp speed controllers
i am thinkink of making some 500 amp speed controllers by wiring up about 40 power transistors to a small 7 amp speed controller to give some speed control. if anybodys done this before this would be usefull as im not quite shure where to start really.
Fight or flight ... ?
...suicide
...suicide
- peterwaller
- Posts: 3213
- Joined: Fri Feb 15, 2002 12:00 am
- Location: Aylesbury Bucks
- Contact:
If only it were that simple. What you are proposing is fraught with many dangers. The fact that you are proposing to use transistors and not FET's suggest you lack experience in this area and I would ask you to think long and hard before trying this. I once built some 210Amp controllers for my first robot and they were only half bridge with relay change over. They worked for a while but while trying to move with another heavyweight on top it finally failed in a cloud of smoke. The clipping diodes had got so hot that the solder melted and they fell out the PCB. Without clipping diodes the FET's then over heated and blew. And although power electronics was not my field I was an electronics engineer for about 40 years.
-
- Posts: 339
- Joined: Sat Oct 20, 2007 7:20 pm
- Location: worthing/ west Sussex
- peterwaller
- Posts: 3213
- Joined: Fri Feb 15, 2002 12:00 am
- Location: Aylesbury Bucks
- Contact:
-
- Posts: 339
- Joined: Sat Oct 20, 2007 7:20 pm
- Location: worthing/ west Sussex