Hello Neil and all,
some more data for the inquiring minds:
The prop we are using is a 15 x 17 mounted on a Volvo Penta 270 sterndrive with 1:2.15 gear ratio. I do not know the real total weight of the boat, but we took out about 400kg and put 460kg back in. All mounted in a 1974 Glastron V174 Bayflite.
Power consumption while getting up on plane is the peak draw, this is where our current limit settings kick in the most.
I limmit pack to 540A (6c) and motor 750A (the soliton can and will do 1000A)
Limmit pack low under load (sagvalue) to 2.4 * 90 = 216V, limit motor to 240V
Limit total output to 130kW, but have seen some higher numbers in the logfile
with the current settings (both meanings) draw figures as they appear on the dash are:
550A peak draw getting on plane. 350Aish for top speed (54kph) 130-140A to stay on plane and cruise. coming from displacement mode you can also build up to 120A-130A without getting on plane, so same current draw much lower speed.
Hope you enjoy this data. Ill be interested as to any findings or further questions you might have.
I do not check the Ymail, you can reach me at anne at newelectric.nl
our youtube channel now has a cool new vid of the powerboat pulling away as seen from shore:
http://youtu.be/Rvg_IA43b9k
regards,
AK
--- In electricboats@yahoogroups.com, "fneilss" <fneilss@...> wrote:
>
> Yowsa! Kinda the opposite end of the spectrum from my long and lean at minimum watts approach to electric boating. I think I could tool along all summer with one charge of a 25kWh battery bank ;) (of course even with LiFePO4's it would sink my boat).
>
> With that big bank you can't go very long at 70+ kW draw/top speed. Have you measured the draw and knots at cruise? Never having planed a boat on electric power, I've always wondered what the current draw would be to keep a small electric speedboat on plane.
>
> What size is the prop? What does the boat displace?
>
> How far do you have to go to commute to work?
>
> Inquiring minds want to know!
>
> Thanks,
>
> Neil
>
>
>
> --- In electricboats@yahoogroups.com, "ams_ak@" <ams_ak@> wrote:
> >
> > Neil,
> >
> > Yes they are.
> > motor: Kostov 11" 250V 260A/duty cycle, we have 2 extra blowers for cooling
> > Controller: Evnetics Soliton1 = 300kW max output
> > Batts: 90 * 90AH Winston LiFePo4, we limit to 540A output (6C)
> >
> > We got all of the above from http://kostov-motors.com/tractionmotors/kostovevmotors(ac-dc)/seriesdcmotorsforelectricvehicles/k11250v/
> >
> > Great company, great service.
> >
> > AK
> >
> > --- In electricboats@yahoogroups.com, "fneilss" <fneilss@> wrote:
> > >
> > >
> > >
> > > --- In electricboats@yahoogroups.com, "ams_ak@" <ams_ak@> wrote:
> > > >
> > > >
> > > > Hello and thanks for the good cheer!
> > > >
> > > > a new vid up on Youtube that goes a small ways toward answering the questions.
> > > > http://youtu.be/jj3gg7A6BZ0
> > > >
> > >
> > > The text on Youtube says 240V - your audio says 300+ amps at one point - 70+ kilowatts??? Are those numbers right?
> > >
> > > Neil
> > >
> >
>
No comments:
Post a Comment