Inverter

[Stephen Birtles]

the whine is the engineer complaining
Stpehen mac70 and ac4400


--- In WanderlodgeForum@yahoogroups.com, Pete Masterson
wrote:
>
> Some electrified rail systems capture the energy from dynamic braking
> (using the DC drive motors as generators) to return power to the
> system. However, the equipment is expensive and heavy.
>
> Diesel-electric locomotives also have dynamic braking - the DC drive
> motors are wired to act as generators when going down grades. The
> power is converted to heat via the biggest toaster grid you would
> ever see. (Watch a railroad locomotive as it goes down a long grade
> and you may see the 'heat waves' coming out on the top of the unit.
> It will also have a characteristic dynamic brake whine if you're
> within earshot.)
>
> BBs are pretty big, but not quite in the same category as
> locomotives. The expense and electrical/mechanical complexity makes
> recapturing the energy not cost effective.
>
>
> Pete Masterson
> aeonix1@...
> '95 Blue Bird Wanderlodge WBDA 42'
> El Sobrante, CA
>
>
>
>
> On Jan 8, 2007, at 6:49 PM, Gregory OConnor wrote:
>
> > The drive line retarder uses power? You would think some one could
> > build an electric alternator for an engine and drive line retarder
> > that takes the energy of a stop and produces amps to store in a
> > battery bank. Think of all the wasted effort it takes to hold back
> > 40,000 lbs.
>
>
>
> [Non-text portions of this message have been removed]
>