Re: [PSUBS-MAILIST] dean test video

[Alex <spm2@nomad.ignorelist.com>]

Well the nice thing about electric motors is that they get more and more
efficient as the torque goes lower, especially for the brushless DC motors, exc
ept at very low torque with a large motor, because of friction. I found some
motors here: http://www.powertecmotors.com/ which would do everything you
needed for your submarine but I am afraid to find out how much they sell them
for!

Any motor controller that you get for an electric car should be able to run the
motor at low speeds, but I guess the concern here would be effeciency. I don't
see why effeciency would be a problem with a properly designed motor controller.

Alex

On 15-Sep-2009 vbra676539@aol.com wrote:
> 
> Dean,
> 
> What sort of controller are you using? I've been looking at EV America stuff
> and wonder about their mosfet controller's ability at low speeds, which is
> where we'll be most of the time.
> 
> Vance
> 
> 
> -----Original Message-----
> From: Recon1st@aol.com
> To: personal_submersibles@psubs.org
> Sent: Tue, Sep 15, 2009 5:31 pm
> Subject: Re: [PSUBS-MAILIST] dean test video
> 
> 
> 
> 
> Hey Ken good to hear from you. I have not checked yet, but I have a feeling
> the controller 
> 
> just kicked out. It did it a few times when we were bench testing. Thought we
> had it whooped
> 
> but maybe not. I still do not have reverse in it, and will probably just redo
> everything. If the
> 
> controller is not going to be reliable, may just pull?the motor and have it
> rewound to a straight
> 
> series motor. I am real pleased with the way it performs. I never dreamt a DC
> motor could be
> 
> so difficult. Lesson learned.
> 
> ?
> 
> Dean
> 
> ?
> 
> 
> In a message dated 9/15/2009 4:13:06 P.M. Central Daylight Time,
> wmartindale@cfl.rr.com writes:
> 
> 
> Dean,
> 
> ?
> 
> Nice Sub, glad to see the video.
> 
> ?
> 
> Wonder what went wrong with the propulsion?
> 
> ?
> 
> Ken Martindale
> 
> 
> ----- Original Message ----- 
> 
> From: Recon1st@aol.com 
> 
> To: personal_submersibles@psubs.org 
> 
> Sent: Tuesday, September 15, 2009 4:47 PM
> 
> Subject: Re: [PSUBS-MAILIST] dean test video
> 
> 
> 
> 
> Thanks Dave, she hasn't ?been down more than 10' so far but she is getting
> close.
> 
> It does make all the hard work and cussin worth while. And I promise the
> video's will
> 
> improve, I really do like looking at them. From inside the sub you do not get
> to see it.
> 
> ?
> 
> Dean
> 
> ?
> 
> 
> In a message dated 9/15/2009 3:41:49 P.M. Central Daylight Time,
> dbartsch2236@hotmail.com writes:
> 
> Dean,
> ?
> ? A wonderful video! A wonderful submarine! Congratulations!
> ?
> ?????????????????????????????????????????????????????????????????????????
> David Bartsch
> ?
> From: Recon1st@aol.com
> Date: Tue, 15 Sep 2009 09:13:21 -0400
> Subject: [PSUBS-MAILIST] dean test video
> To: personal_submersibles@psubs.org
> 
> 
> OK not very action packed video but it is all I got.
> 
> ?
> 
> http://www.youtube...com/watch?v=huxo9Dzn7iI
> 
> ?
> 
> first part I am just trying to get neutral, and then the big break before we
> get 
> 
> playing 
> 
> ?
> 
> Dean
> 
> 
> 
> 
> Bing brings you health info from trusted sources. Try it now! =
> 
> 
> 
> 
> 
> 
> 
> 

-- 
Mailed with XFmail on 15-Sep-2009.
God saved Noah, but Noah had to build an ark!



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