Hi George,
The motors I made mention of, are in fact PM brush motors, they are rated 130V DC and 18.5 amps, 6750 rpm. Using a router speed control and a full wave bridge rectifier I can use batteries or grid power.
The inverters give a one step increase 12vdc up to 120vac modified sine wave, 5,000watt cont. and a peak of 10,000watts for a few seconds.
I have used a stepup transformer, 5000 watt, to deliver 240vac with about 21 amps to drive a Delta 2HP planer motor. (220vac 18amps 3450rpm).
I dabble and tinker quite a bit so I tend to mix and match things a lot, moving parts and pieces around I seem to never keep any one project in a complete and functioning group.
I do enjoy dreaming and scheming :))
Ron
--- In electricboats@
>
> I think the treadmill motor is actually a brushless DC motor, so there is
> no need for an inverter to turn DC from the battery into AC. The batteries
> can be connected to the power source. I am now googling my way through a
> ton of site swith "arduino ev" trying to see who has already invented this
> wheel.
>
>
> In a message dated 2/27/2010 10:39:57 A.M. Eastern Standard Time,
> rlgravel@... writes:
>
>
>
>
> When I look at solutions, my mind goes to finding a way to accomplish what
> I want to do, using parts that can be used in other applications.
>
> Not knowing the size of the boat you plan, I will throw out a guess that
> you can handle around 300 pounds of batteries, consider a 2500 -5000 watt
> inverter that works on 12 or 24 volts and steps up to 120 volts, using a
> bridge rectifier you can find treadmill motors up to 2 and 3 HP and a 15-50
> dollar router type speed control, you will need a reduction of around 3-5:1
> which gives a final list of parts that can very quickly be removed and used
> in other places (if you are someone that likes to tinker).
>
> The batteries you have to have in any case, the other parts depending on
> wattage can range from 300 dollars on up. The fact that they can be used in
> other things is what makes this look good to me.
>
> Just my thoughts
>
> Ron
>
> --- In _electricboats@
> (mailto:electricboats@
> >
> > saab4991 wrote:
> > >
> > >
> > > I am a long time lurker desirous of building a small launch to use on
> > > a very quiet local river. Two questions that haven't been answered by
> > > the search facility:
> > >
> > > 1. Why wouldn't an auto starter motor provide a low tech solution for
> > > short distance cruising?
> > >
> > > 2. Has anyone looked at the arduino micro-controller as an inexpensive
> > > motor controller? The computer itself is around $20.00 and a diy motor
> > > controller is (supposedly) available as a kit for $15. This would
> > > control 36 volts and 8 amps.
> > >
> > > Thanks for the help
> > >
> > There are auto starters out there that are PM motors. The major problem
> > with these are the short duty cycle.
> >
> > Don't know any thing about the Arduino controller and the H-bridge
> > systems for most of these type units are well below the power level
> > needed. We need specs to answer this question.
> >
> > Kevin
> >
>
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