ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
Air Compressor feeder conductor sizing
by Potseal. 01/15/18 09:08 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 20 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
12V DC pump motor #211329
10/05/13 08:52 PM
10/05/13 08:52 PM
H
Hammer1  Offline OP
New Member
Joined: Oct 2013
Posts: 2
MN
I have a 12V DC pump motor that I want to run off 110 recepticle. How can this be done?

Work Gear for Electricians and the Trades
Re: 12V DC pump motor [Re: Hammer1] #211330
10/05/13 09:20 PM
10/05/13 09:20 PM
J
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 791
Chicago, Il.
Boy, is that an open ended question? Could be as simple as a small wall wart to a large linear or switch mode power supply. Is a control ladder required? We need lots more info.
Joe

Re: 12V DC pump motor [Re: Hammer1] #211331
10/05/13 09:28 PM
10/05/13 09:28 PM
H
Hammer1  Offline OP
New Member
Joined: Oct 2013
Posts: 2
MN
It is a pretty small pump, I believe it draws 10 amps. It is an on demand pump that will draw water out of a tank and send to the toilet cycling everytime the toilet is flushed.I am trying to avoid having to have a battery and charger to run it.

Re: 12V DC pump motor [Re: Hammer1] #211333
10/05/13 09:48 PM
10/05/13 09:48 PM
J
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 791
Chicago, Il.
Then there are possibly thousands of single output DC power supplies that could meet your needs. Your application isn't one that requires 10A continuously, but probably needs more than 10A for short periods. Things to consider along with environmental and any required listings. Also consider the use of an appropriately sized flyback diode at the pump.

Last edited by JoeTestingEngr; 10/05/13 09:50 PM.
Re: 12V DC pump motor [Re: Hammer1] #211334
10/05/13 11:08 PM
10/05/13 11:08 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,166
Estero,Fl,usa
If this is something you are selling to a customer? I would get the supply the manufacturer specifies for the product. If you are just experimenting/inventing at home, Ebay has several supplies for around $40-50 shipped if you look at "12vdc 10 amp power supply".


Greg Fretwell
Re: 12V DC pump motor [Re: gfretwell] #211335
10/05/13 11:19 PM
10/05/13 11:19 PM
S
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,328
Alaska
Simple. Call an electrician. Welcome to the board BTW
?=^)


"Live Awesome!" - Kevin Carosa
Re: 12V DC pump motor [Re: Hammer1] #211346
10/07/13 09:25 AM
10/07/13 09:25 AM
J
jdevlin  Offline
Member
Joined: Aug 2002
Posts: 402
welland ontario canada
Eliminate the battery and just use a 10 amp charger.

Re: 12V DC pump motor [Re: jdevlin] #211522
10/23/13 10:20 PM
10/23/13 10:20 PM
mxslick  Offline
Member
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Originally Posted by jdevlin
Eliminate the battery and just use a 10 amp charger.


Nope, very bad idea. Most chargers will either put out too much voltage (they often have a high voltage start on charging and taper down as the battery charges), have excessive ripple current which can affect the motor's life, and often have very poor current/voltage regulation abilities.

Finally, a 10 amp or greater charger will often cost more than the 10 amp power supplies available from eBay, Mouser, DigiKey, etc.


Stupid should be painful.
Re: 12V DC pump motor [Re: Hammer1] #211524
10/24/13 09:35 AM
10/24/13 09:35 AM
G
ghost307  Offline
Member
Joined: May 2005
Posts: 926
Chicago Illinois USA
If you're dead set on using a charger you'll need to do something to dampen the ripple and stabilize the voltage.
Without opening the charger and doing a bunch of calculations to figure out exactly what to put inside; the easy way is to run the motor off of a battery that is being constantly charged by an off-the-shelf battery charger.

But I agree that you will likely spend more time and effort than just biting the bullet and buying a proper power supply.

BTW, don't forget about the inrush current required start the motor when you're figuring out how many amps you are going to need.


Ghost307

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
Show All Member Profiles 
Top Posters(30 Days)
sparky 22
Admin 20
Potseal 13
Popular Topics(Views)
243,531 Are you busy
180,336 Re: Forum
170,825 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.019s Queries: 15 (0.003s) Memory: 1.0010 MB (Peak: 1.1741 MB) Zlib enabled. Server Time: 2018-01-18 08:06:26 UTC