T-Pain Is On A Boat: Re: [Electric Boats] MARS BLDCmotor

Wednesday, August 5, 2009

Re: [Electric Boats] MARS BLDCmotor

Paul,

A BLDC motor that is externally driven will generate a three phase
sinusoidal output (120 degrees apart) that can be rectified to generate
DC. It is analogous to an alternator without a field control. The one
problem to solve is how to regulate the output.

Tim

--- In electricboats@yahoogroups.com, Paul Beaurain <beaurainpaul@...>
wrote:
>
> Denny,
> What are the chances of using that motor to couple to a diesel engine
without a controler and some sort of a bridge rectifier to generate DC
to charge a 48 volt battery bank driving a Etek RT.
> Paul.
>
> --- On Wed, 8/5/09, dennis wolfe dwolfe@... wrote:
>
>
> From: dennis wolfe dwolfe@...
> Subject: Re: [Electric Boats] MARS BLDCmotor
> To: electricboats@yahoogroups.com
> Date: Wednesday, August 5, 2009, 5:32 AM
>
>
>
>
>
>
> John,
>
> The 20 turn and the 28 turn motors produce the same power. I got a new
motor pulley & belt for the 28 turn so both motors turned the prop shaft
the same speed.
>
> I returned the new pulley & belt to the bearing house and am selling
the new motor.
>
> Denny
>
> ----- Original Message -----
> From: John Delia
> To: electricboats@ yahoogroups. com
> Sent: Tuesday, August 04, 2009 6:08 PM
> Subject: Re: [Electric Boats] MARS BLDCmotor
>
> Why are you selling this as opposed to the 20 turn if it runs with
less
> speed? It seems like it is better than your 20 turn unit. John
>
> On Tue, Aug 4, 2009 at 1:11 PM, mcdennyw dwolfe@dropsheet. com> wrote:
>
> >
> >
> > I got a 28 turn MARS BLDC to try out and found it worked exactly
like my
> > old 20 turn I am using so will offer it here before posting on EBay.
It's
> > brand new aside from about 30 minutes of test run time.
> >
> > P/N ME0201014201, date code 090430. This is the air cooled design
good for
> > 100 amps continuous but has 28 turn windings so runs with less speed
and
> > more torque than the normal 20 turn motor. HP output is the same.
The
> > exterior, wiring connections, mounting holes, shaft size, etc is
exactly the
> > same as the common 20 turn motor sold by Thunderstruck and others.
> >
> > With a Sevcon PMAC (not included) on 48 volts it turns 2400 rpm with
no
> > load and 1480 rpm loaded to 94 amps. 1500 rpm might be suitable for
direct
> > drive with a smallish prop, maybe 10" or 11" dia and 9-11" pitch,
depending
> > on how easily driven your hull is.
> >
> > Price $325 with free ground shipping to the lower 48.
> >
> > Note you must use a sped controller made specifically for a
brushless
> > motor. Sevcon and MARS units are available at Thunderstruck- ev.com
and
> > others.
> >
> > Please email me off list if interested.
> >
> > Denny Wolfe
> > dwolfe@wolfeboats. com <dwolfe%40wolfeboat s.com>
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>