Running DC pump off AC converter

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  #1  
Old 04-21-10, 11:09 PM
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Running DC pump off AC converter

Hi,
New to these forums, but looks like the right place to ask:

I have a 12vDC water pump (flojet 03526144a) I would like to run using an AC->DC converter but want to make sure I get one rated properly so I don't blow anything up.
The specs on the pump say: 5.2 amp (10A fuse), but I have seen different Amps listed on the web anywhere from 4.4A to 7A.

For the AC->DC converter, how close do I need to be on the Amp rating? Should I go higher or lower?
Would either of these be suitable for the job?:
1) http://bit.ly/9wE4nZ
2) http://amzn.to/dcWBKj

Thanks!
 
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Old 04-22-10, 04:33 AM
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Motors use more electricity to start up.

They made it easy for you in this case, it has a 10 amp fuse!

So I would get a 10 amp or higher power supply.

Also with electrical things in general, there is an 80% rule of thumb. Basically you would not want to load a circuit "all the time" with more than an 80% load. (80% of the available amperage.)
 
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Old 04-22-10, 08:03 AM
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Originally Posted by rb1980 View Post
For the AC->DC converter, how close do I need to be on the Amp rating? Should I go higher or lower?
The converter should be rated higher than the max rating of the pump by at least 20%.

The variable amps draw by the pump are probably a result of different use conditions. The pump likely draws more power when there is a higher head pressure (height of pump outlet).

Would either of these be suitable for the job?:
I think you need a converter that outputs at least 10A to match the pump fuse.
 
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Old 04-22-10, 08:30 AM
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Great, thanks for the replies.
Based off your suggestions, I think I will try this one:
http://amzn.com/B00006HSAR
makes sense. (I was just hoping to get off a little cheaper than $50+).
 
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