[PSUBS-MAILIST] Motor Issue

[James Frankland via Personal_Submersibles]

Thanks Emile.

This motor is definitly not right compared to the other two.  Im going to
try Cliffs idea of adjusting the alignment.  Seems to be the only thing i
can try, other than a new motor or air comp.

regards
James


On Tue, 20 Jul 2021 at 08:44, via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> All,
>
>
>
> It is normal that a brushed oil filled motor runs not well in air. The
> brushes will float on the oil due to the higher RPM.
>
>
>
> Emile
>
>
>
> *Van:* Personal_Submersibles <personal_submersibles-bounces at psubs.org> *Namens
> *James Frankland via Personal_Submersibles
> *Verzonden:* maandag 19 juli 2021 13:22
> *Aan:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Onderwerp:* [PSUBS-MAILIST] Motor Issue
>
>
>
> Hi All
>
>
>
> Does anyone have any ideas on this?
>
>
>
> Following the dive i did last week, i had a motor issue.  The motor did
> not actually stop or fail, but during the dives it just didnt feel right.
>
>
>
> The positive wire going into the rotating penetrator would get hot after
> about 10 seconds of motor power.  I could also hear a kind of electrical
> noise from within somewhere.
>
>
>
> So, the next day i took the motor apart.  The oil (Silicone oil) was VERY
> black.
>
>
>
> I was expecting to see something had been rubbing, but i couldnt see
> anything.  It all looked fine.
>
>
>
> I put it all back together and it runs fine in air.  However, there does
> seem to be a louder motor running noise than the others.
>
>
>
> I am unsure what the issue is.  My feeling is that its carbon in the oil,
> making it conducting and hence slightly shorting out, causing the heat on
> the cable.
>
>
>
> The other motor cable did not get hot, nor did the oil go black.
>
>
>
> Again, another video here.
> https://www.youtube.com/watch?v=v_VxVfhM9t8&t=2s
>
>
>
> Would appreciate any input.  Im not sure what to do.  Buy a new motor?
> Air compensate it?
>
>
> Many thanks
> James
>
>
>
>
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>
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