Re: Saturn starter motor

["philippe Borges" <philippe.borges@freesbee.fr>]

A circuit with 1 x 555, 2 connected parallel mosfet 60V 50A
continuous(BUK456-60A), pot, the board and few passive components cost me
12$ note i already have for free the more expensive: the big radiator (don't
forget compound grease)
And what about pleasure of using a  self made motor  controller on his
electric bike ?
For big current you can use IGBT 600V 400A  modules at 80$ each : outch!
with IGBT gate driver at 5 $ its little more expensive but for much more
current, but the design layout would be more difficult because of the high
currents .

Salut
Philippe, the frenchie over the ocean .


----- Original Message -----
From: PETER VANDERWAL <peterv@peoplepc.com>
To: <ev@listproc.sjsu.edu>
Sent: Friday, June 30, 2000 10:33 PM
Subject: Re: Saturn starter motor


> > I guess the next step is a controller. I thought maybe a Micro
> > Processor driving a couple of MosFets. What would be a good choice
> > of MosFets?
> > On the cheep side. Hey, I'm on a fixed income here. I have a Micro
> > I can use, Probably most of the parts too. I figure the most of my
> > running will be less than 50% Duty Cycle (unless my GD gets on it)
> > so do you think I could get a hour running time out of the 3
> > batteries?
> >
>
> You'll most likely go thru a bunch of MOSFETs before you figure out how to
> make it work with out smoking the FETs.  It might be cheaper just to by a
> ready made controller for $35 from:
> http://members.tripod.com/~divelec/hbridge.html
>
> This is a 24V controller that can handle 35 amps continuous and 50 amps
> peak.
>