Parallax wrote:

I remember in "Run Silent, Run Deep", the sub motor could run with
batteries in either serial or parallel, not sure why. Serial would
give lots of Volts perhaps for lots of power whereas parallel would be
for extended cruise at low power. Could such a system be used here?

Why? The speed of these electric motors is dependant on the voltage (RPMperV). Serial =high speed, parallel =1/2
speed at twice battery capacity.
I can't see why such a system could not be used on an electric boat.

someone suggested to me that if i were to use the propeller to
regenrate power. i would have to have the system in parallel so under
charging mode, diodes could be used to step down the 48v system to a
12 v. because the batteries only start to charge after the generator
has earched the capacity of the batteries.

so to charge a 48 volt system, the propeller would have to spin 4
times as fast to charge the batteries than if its a 12v

i probably didnt explain it very well. but basically dont buy into the
promise of regenration .

On 14 Jul 2004 00:59:03 -0700, (yihang bmc-unsw)
wrote:

someone suggested to me that if i were to use the propeller to
regenrate power. i would have to have the system in parallel so under
charging mode, diodes could be used to step down the 48v system to a
12 v. because the batteries only start to charge after the generator
has earched the capacity of the batteries.

so to charge a 48 volt system, the propeller would have to spin 4
times as fast to charge the batteries than if its a 12v

i probably didnt explain it very well. but basically dont buy into the
promise of regenration .

Hi,

Might be possible to get a 'linear current booster' or DC to DC
converter to convert the generated ~12v to a suitable 48+V for
charging.

cheers,
Pete.

Check out http://www.solomontechnologies.com/

They do buy into regeneration and have it working


"yihang bmc-unsw" wrote in message
om...
someone suggested to me that if i were to use the propeller to
regenrate power. i would have to have the system in parallel so under
charging mode, diodes could be used to step down the 48v system to a
12 v. because the batteries only start to charge after the generator
has earched the capacity of the batteries.

so to charge a 48 volt system, the propeller would have to spin 4
times as fast to charge the batteries than if its a 12v

i probably didnt explain it very well. but basically dont buy into the
promise of regenration .