0
\$\begingroup\$

I'm looking to use a 12V 60W DC water pump in my project, and I'm trying to find a suitable way to supply power for the pump. I'm wary about using the brick-like power adapters as I think they are not reliable. I see that SMPS is more reliable. Can I use a 12V 10A SMPS unit to power the pump ? One concern is that I read that a DC motor could draw upto 3 times more current while starting. So the SMPS could cut-off supply due to overload. Please note, I will be turning the pump on/off many times in day using arduino/relay control.

Water pump - http://www.ebay.in/itm/12V-High-Pressure-Auto-Diaphragm-Water-Pump-5L-min-100-PSI-Pressure-Switch-/222221212173?

SMPS - http://www.ebay.in/itm/12V-10A-120-Watt-DC-Switch-Mode-Power-Supply-Driver-Transformer-CCTV-Led-Strips-/322280796678?hash=item4b096eb206:g:aqwAAOSw6n5Xwt4s

\$\endgroup\$
0
\$\begingroup\$

It's probably adequate. The pump draws 60W continuous, which is 5A, according to the nameplate, and you are proposing a 10A power supply.

Diaphragm pumps, to my knowledge, do not tend to draw enormous current on start-up, and the power supply, if the ratings are real, is capable of supplying some startup surge, so a 2:1 factor is probably okay.

The only way to be sure, really, is to test it. You could also go for a much bigger power supply to be more sure.

\$\endgroup\$
0
\$\begingroup\$

Can I use SMPS to power 12V DC water pump

Yes.

I'm wary about using the brick-like power adapters as I think they are not reliable. I see that SMPS is more reliable.

Most of these power supplies are SMPS. You've got some misunderstanding there.

One concern is that I read that a DC motor could draw upto 3 times more current while starting.

Depending on the motor, a limitation of how much overcurrent the power supply can source might or might not be a problem. For pumps, I'd expect the motor not to need overly much turn-on current, because there's most likely not much mechanical torque that needs to be generated to get the motor started. But: without knowing how exactly your pump motor works, this is all speculation.

As a general hint: if you need reliability, I don't think "the thing I found on ebay looks fine, I'll go ask electronics.stackexchange.com whether it'll work" is a good idea.

\$\endgroup\$
  • \$\begingroup\$ Thanks for your reply. This is first time i'm asking a question in this forum, I gave the product links as a reference so that the tech specs may help in answering. Probably I should mention any relevant technical parameters in the question itself. \$\endgroup\$ – Rajsrini Oct 31 '16 at 17:01
  • \$\begingroup\$ There's absolutely nothing wrong with linking to the product in question! but you're right, adding specs to a question is a good idea :) my point is that if you're worried about reliability, some unknown seller on ebay is probably not your source of choice for components! \$\endgroup\$ – Marcus Müller Oct 31 '16 at 17:51

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.