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Re: [PSUBS-MAILIST] Oil Compensated Thursters



Brian: 
 
My dad motivated me to stay in High School by putting me to work on Sanitary Sewer Systems (there is an oxymoron) and I serviced some lift station pumps.  We used transformer oil in them. 
 
The engineer in your URL says "The lower efficiency carries about a 2% increase in overall energy costs."  -- I'd like to see what that is based on, and does it pertain to low voltage motors too?
 
And the water well pumps are often compensated with plain water.  They just use wire in the winding that still has the insolation and stainless steel and plastic guts, but again these are high voltage. 
 
I suspect the efficiency may be really bad due to low voltage trying to cross through the oil. Perhapes I'll have to experiment on a smal DC motor to find the answer. 
 
The next question would then be, does 500 psi change the resistance of the connection between the brush and commuter in and oil compensated 24 to 36 volt DC Motor?  What do you think?
 
--Doug J
 
In a message dated 11/16/2006 1:36:05 AM Central Standard Time, ojaivalleybeefarm@dslextreme.com writes:
Doug,
            Do you think something like this would work?   These are not DC however.
 
Brian
----- Original Message -----
Sent: Wednesday, November 15, 2006 19:35
Subject: [PSUBS-MAILIST] Oil Compensated Thursters

Can anyone support this statement: "Scripps has tried to fill the DC motors with oil, but the oil gets between the brushes and the commutator, where the insulation properties of the oil causes problems. Although it would be possible to use high voltage to break through the oil film, the high voltage is a safety hazard for the divers."
 
I was thinking about 24 or 36 volt oil compensated brushed trolling motors, but after reading the above I looked and could not find any examples of oil compensated brushed motors under 100 volts.
 
What are your experiences and thoughts?
 
Thanks
--Doug J