Jim,
There is a disadvantage
for brushless; High RPM. If you hear the term outrunner”it means that
the motor housing rotates for lower rpm/ higher torque.
For a thruster you will
need a 1:4 reduction anyway.
As far as I know there
are no brushless outboards. Mastervolt offers Brushless inboards.
http://www.mastervolt.us/marine/products/e-propulsion/
Not cheap. But complete…
I assume their units will not interfere with fishfinders etc.
All the best, Emile
Van:
owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]
Namens JimToddPsub@aol.com
Verzonden: zaterdag 25 december
2010 14:12
Aan:
personal_submersibles@psubs.org
Onderwerp: Re: [PSUBS-MAILIST]
Brushless motors
Yes, brushless are used in model aircraft
for two primary reasons: higher efficiency and low RF interference.
There are other advantages as well.
I really know very little about electric
motors, controllers, etc. which is why I'm hoping to hear comments from
the experts. I prefer to buy and adapt off-the-shelf units that are
already designed for underwater applications (saltwater) rather than
building housings and so forth myself.
I hope you and all the PSubbers around
the world are having a very merry Christmas. The sun will rise
in another 20 minutes here in the central US.
In a message dated 12/25/2010 6:37:21
A.M. Central Standard Time, MerlinSub@t-online.de writes:
Hmm.. the 1,6 to 2,6 kw high power running a modelhelicopter units also?
Better test before speed on building 2-3 thruster this way and find out that
the sub sensors are blind by by pulse noise. The brushless electronic is also
pulse moudulation isn't it?
vbr Carsten
<JimToddPsub@aol.com> schrieb:
> Carsten,
>
> You brought up another advantage of brushless motors. They cause
much
> less interference than brushed motors which is one reason they're
used in hard
> drives and cooling fans in computers.
>
> Jim
>
>
> In a message dated 12/25/2010 3:17:46 A.M. Central Standard Time,
> MerlinSub@t-online.de writes:
>
> Why not. But make shure that brushles motors and sonar/echosounder
do not
> interfer.
> vbr Carsten
>
> <JimToddPsub@aol.com> schrieb:
> > Since one of the problems with compensated motors is the
tendency of the
>
> > brushes to float at higher RPM, this begs the question of why
brushless
> > motors are not commonly used instead to eliminate that
issue?
> Brushless also
> > tend to generate less heat as well as having other
advantages. Is the
>
> > issue just the higher cost? Less availability?
Complexity of
> controllers?
> >
> > I don't know If Minnkota produces brushless units or not, but
I can
> > contact them. What about the manufacturers of bow
thrusters?
> > Weigh in with what you know.
> >
> > Thanks,
> > Jim
>
>
>
>
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003. Your email address appears in our
database
> because either you, or someone you know, requested you receive
messages
> from our organization.
>
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> removeme-personal_submersibles@psubs.org
>
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
>
> PSUBS.ORG
> PO Box 53
> Weare, NH 03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************
>
>
************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003. Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.
If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
removeme-personal_submersibles@psubs.org
Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.
PSUBS.ORG
PO Box 53
Weare, NH 03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************
Geen virus gevonden in
dit bericht.
Gecontroleerd door AVG - www.avg.com
Versie: 10.0.1170 / Virusdatabase: 426/3335 - datum van uitgifte: 12/24/10