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Unread 01-07-2010, 12:41 PM   #1
Contra
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Had a thought...yes it hurts sometimes...

i have an extra compressor in my garage at home, (as i use my large belt compressor for home use)

it is a 110volt 15 amp 1.5hp, 2.5 gallon

i was thinking about putting it in my jeep for OBA, but I wanted to hard wire it and not have to use an inverter, can i re-wire the compressor to make it DC some how?

it is fairly new and if i can seperate the tank it would be a great addition...

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Unread 01-07-2010, 01:53 PM   #2
93jeepyj
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You would have to find a dc motor and controls for it but its not impossible.
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Unread 01-07-2010, 02:12 PM   #3
Indy
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Going back to electrical, and it's a long way back so forgive me if I do the math wrong. But at full load the AC compressor is going to use 1650 Watts of power. To do the same with a 12v system you need to be able to provide continuous 137.5 amps. That's a lot
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Unread 01-07-2010, 02:30 PM   #4
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i might be wrong, but it is a 15 amp motor and that means roughtly 1800 watts right?

where do you get 137.5 amps?

i guess i will do things the easy was and get a pre built, i just wanted to use what i had
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Unread 01-07-2010, 04:12 PM   #5
Otahyoni
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Quote:
Originally Posted by Contra View Post
i might be wrong, but it is a 15 amp motor and that means roughtly 1800 watts right?

where do you get 137.5 amps?

i guess i will do things the easy was and get a pre built, i just wanted to use what i had
Watts Law is where he got the 137.5 amps. Watts Law states P(watts)=V(volts) x I(amps).
So P= 110v x 15 amps = 1650 watts
To go to 12v you'd take P divided by V = I
So 1650/12 = I(amps) = 137.5 amps

Now there's more than you really wanted to know...

EDIT: Hey! I actually used something i learned in school!
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Unread 01-08-2010, 01:23 AM   #6
Indy
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Yeppers, 110v can do the same job with a lot less amperage than 12v can. You could still use the tank and get a different compressor, but I think you would be wasting an otherwise usable compressor considering you can get a 7g tank for less than $20.

Sell the compressor, use the money to buy your 12v setup.
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Unread 01-08-2010, 09:21 AM   #7
Mickey_D
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Contra, does your Jeep have A/C? If so, does it still work?

If it has A/C and it doesn't work, why not convert to OBA?

If it doesn't have A/C why not grab the bracket and compressor from the wrecking yard and put OBA in. You can use the tank, safety valve, gauge and pressure switch from the 110V compressor. All you need is the hoses, oiler, dryer and a couple 3 way manifolds.
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Unread 01-08-2010, 04:30 PM   #8
Otahyoni
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Does anyone know the output on an a/c compressor? I'd bet it's really high (good thing)... I had a spare a/c compressor that had a separate oil sump so it could run for a long time without burning up...
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And all of the diodes may have committed suicide, leaving you with a fun whirly thing under the hood that produces nothing.
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