Ed,
I have been aboard diesel/electric (Moran tug "Christine Moran"), steam
turbine/electric (oil tanker) and pure electric vessels (tour boat Ft Myers).
The tug used it for maneuverability, the tanker for maneuverability and cost
savings (turbine gear boxes are Very Expensive) and the tour boat for silence
and no fumes.
"Traction motor" is one that turns the wheels.
The main thing in electric propulsion is not the motor, electric motors such as
used in electric cars and boats are reliable and efficient, it is how you make
and store the electricity to power the motor.
The magic is not in the motor, it is in how you make the juice.
I did read some years ago, in Home Power magazine, of a Swede or Norweigian who
made a solar powered electric boat. It was light, small, and slow.
I would start with Home Power magazine, a magazine dedicated to "home made
power". You can find one in Barnes and Noble. They will sell you several DVDs
with all their back issues. I don't subscribe any more but when I did they did
cover electric boats as well as other vehicles. I believe there are electric
boat races annually somewhere.
Norm
S/V Bandersnatch
Lying Julington Creek
30 07.695N 081 38.484W
----- Original Message -----
From:
To: liveaboard@liveaboardnow.org
Sent: 7/25/2008 10:15:50 AM
Subject: Re: [Liveaboard] electric power
When we get finished with the "latching relay" discussion could we look at
electric propulsion? I would love to hear about the pros and cons from you guys
that know electricity. AC motors, DC motors, permanent magnet motors,
controllers, new battery technology (Lithium titanate nano). What does
"traction motor" mean? Does a larger diameter motor had more torque than a
skinny motor, other things equal? etc. There seems to be brushless AC and DC
motors. How do they do that? Does a controller control DC current or AC
frequency or what? I need educating.
Ed Schwerin
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