DRSSTC update - science fair stuff

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "jimmy hynes by way of Terry Fritz <teslalist-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>

I am starting to get back to work on my coil, now that the science fair is 
over. I got third in my division (high school kids, electronics). I am kind 
of dissapointed because there weren't that many projects, and they gave two 
thirds. The worst part is that the first place project was finding the 
optimum temp. to run solar cells (grumble grumble). kind of like the part 
of my project when I did the peak current tests, except that you can't find 
the answer to that on the datasheet (and that my test was done without good 
equipment, and I may be 10% off) . Ok, I'm done complaining now ;-)).

The good news is that I get to go to the state fair next monday, hopefully 
they will have someone who can understand my project. I got a couple IGBT 
bricks from ebay. part number CM150DU-12H. They can switch 600v -at- 150a, and 
aren't too much slower than the little guys. I dont have any extras, so I 
am going to run the gate "down" around 30v to be safe. I am trying to keep 
the log book updated, so you can check my progress there. I also have some 
more pictures to upload. so far I have gotten frustrated with bad 
connections again, and have decided to just use the bricks. I have been 
having more problems with bad connections and dead gate drive chips, but 
the brick IGBTs have been nice so far because the part count on the 
H-bridge went from 16 to two ;-)).


Jimmy