Re: eCycle

[Rich Rudman <rmanzan@tscnet.com>]

Russell Levine wrote:
> 
> > > Don't assume the published specs include cooling, they don't. The
> > >  machining on the Ecycle is beautifull... and there are NO cooling fins.
> > >  Danger Will Robinson, Danger!!. I can see I am going to spend a lot of
> > >  time hammering this fact home. Reality can be a pretty hot place.
> >
> > They use the frame of the bike as a heatsink.
> >
> 
> How much surface contact would they need to transfer, say 500+ watts of
> waste heat over a minute or two (the most I'd assume their 5Kw motor would
> create at peak current)? It would have to be more than the mounting bolts,
> and maybe even be in intimate contact with a large part of the outer casing
> (and smeared with heat transfer compound - what a mess!).
> 
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That sounds about right, And they need to fill the windings with
thermall conductive filler to get the heat out to the Aluminum.
Rich Rudman

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