hehe no I bought a couple several months ago. got them for 25$ each.
they seem to be in regular supply so don't pay too much. not sure who
>have used that many but somebody is getting rid of a lot of them. while
Dan, nice to see you digging in.
In the 300A region, I've used the Fairchild FMG2G300US60E with good
success in my BLDC controller, it's a bit low for a brushed motor
but in the 250V - 380V pack range with BLDC or ACIM it should be
reasonable. A six-pack of them (three modules) goes for about $250
which is quite reasonable for new parts, I think. That's new parts,
not used, and it has a good temp coefficient so you can use the
voltage drop across it to estimate current for current limiting and
control. With enough voltage, 60 to 80kW should be reasonable and
those are pretty cheap. I looked at the Ebay ones and decided that
I wanted something that was serviceable and repeatable, so when I
found these, I used them. Since I was repairing an already (partially)
debugged controller I felt the risk of using a non-self-protected
IGBT module was pretty low so I went with those.
I would think that the lower voltage drop of 600V modules, generally
lower cost of 600V modules, coupled with better snubbing capacitance
may be a more cost-effective choice, especially if some builders are
going to buy new parts for their controllers.
I don't know if it's of interest, but I'm working on a new BLDC
control board and I can post schematics and gerbers and source code,
but I don't have the time for tech support. I don't know how many
people out there are using BLDC's, but I am.
-Dale
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev