[PSUBS-MAILIST] Motor Issue

[Rick Patton via Personal_Submersibles]

James, you mentioned that one of the two wires is getting hotter than
normal and the first thing that came to mind was that it didn't have a
solid connection somewhere? That may not explain the abnormal noise you
said it is making but a bad connection will heat up a wire.
Rick

On Mon, Jul 19, 2021 at 11:37 PM James Frankland via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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
>>
>>
>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20210720/533239d4/attachment.html>