+ At what voltage?
Sorry, I guess I overlooked one of the obvious parameters. ;) The
device is being designed for just a single 12V deep cycle battery.
+ Just out of curiosity, why are you bothering with an IGBT or
+ MOSFET? Why not just a resistive load bank?
Throwing a series of light bulbs together wouldn't leave us much to
design. The professors would give us funny looks and we'd receive
failing grades for picking a project that was too simple for 4th-year
electrical engineering students (well, 5-1/2 for me). Setting out to
design it around a transistor *and* a constant-current discharge gives
us several things to work on. More specifically, it lends itself to a
three-person project, with each person responsible for one of the
following:
1. LabVIEW VI creation
2. Charger interface and loadbank design and device sizing
3. I/O signal conditioning, scaling and amplifying
Obviously, there's a given amount of overlap in those three
areas... especially since I probably have one of the easier of the
three tasks (#2).
And above all else... I've already built a purely resistive load bank
before (for load testing fuel cells at work). The only difference in
this project would be replacing manual switches with relays activated
by LabVIEW (yawn). Building one based on PWMing a transistor is
something I've never done before, but something I would like to study
a bit more intimately, given its applications in EV controllers and
various other devices.
Last semester we considered all our options...
* Can't be too difficult for undergrads to design (Can't fail!).
* Can't be easy enough for a high school freshman to design (What's
the point?)
* Can't take too much time for full-time students also working
part-time (This is only 2hrs of a 14hr schedule, + work).
* Can't take 5 minutes to design (Again, what's the point?)
* Must teach us something worthwhile (Translation: We want to learn
something that our school deprived us of).
* Can't cost us very much (ASU is only reimbursing up to $100 and
we're poor-ass college students).
And the list goes on and on...
-~-~- mason s. convey -~-~-
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