Combine two AC-DC adaptors to increase the amps

[DerZauss]

Hi! Long story short, I have a tire inflator that has an input of 12v 10amps, I've been running with my car battery just fine, however, I wanted to stop using it to avoid stress/discharge the battery constantly, so I purchased an off the shelf Chinese AC-DC adaptor that was supposedly rated to provide that, 12v 10 amps, however, the tire inflator pump just won't work (it receives current and the screen turns on, etc, but the pump just doesn't start) I think is due to not providing enough amps, (multimeter reads about 11-12 amps, the battery 30-35) So as a final try, I wanted to combine the previous adapter with another one I have laying around rated for 12v-8amps, Is this possible? if so, how would you recommend doing it?

Many thanks in advance.

 

[Tony Stewart]

If the DC adapter is close to Vbat. use both to solve your problem.

 

[danadak]

https://www.edn.com/paralleling-power-supplies-many-viable-options-but-know-the-tradeoffs/

 

[Diver300]

You are going to have a huge problem starting the tyre inflator unless you have much larger rating of power supply. Putting two in parallel is fine, but you need more current than just those two.

There was a similar request recently:- https://www.electro-tech-online.com...ighter-want-to-add-mains-power-option.166049/

 

[DerZauss]

If the DC adapter is close to Vbat. use both to solve your problem.

Yes, the car battery is 12v

https://www.edn.com/paralleling-power-supplies-many-viable-options-but-know-the-tradeoffs/

Thanks will check it Out

You are going to have a huge problem starting the tyre inflator unless you have much larger rating of power supply. Putting two in parallel is fine, but you need more current than just those two.

There was a similar request recently:- https://www.electro-tech-online.com...ighter-want-to-add-mains-power-option.166049/

So it will not be as easy as I thought, I missed that one, thanks, I will read it

 

[DerZauss]

You are going to have a huge problem starting the tyre inflator unless you have much larger rating of power supply. Putting two in parallel is fine, but you need more current than just those two.

There was a similar request recently:- https://www.electro-tech-online.com...ighter-want-to-add-mains-power-option.166049/

You guys were indeed correct, as using both AC-DC adapters didn't start the pump, as for the unregulated power supply option sounds interesting, maybe I will try if I can't do anything else, is there a way to use the 12v 10amp adaptor? I just do not want to lose it, sorry if this sounds dumb, most of my experience is soldering wires together and replacing components in already existent circuits,

 

[Tony Stewart]

You are only limited by the size and quality of the battery. Any trickle charge can restore the voltage in between occasional use.

 

[DerZauss]

You are only limited by the size and quality of the battery. Any trickle charge can restore the voltage in between occasional use.

Yes, I only wanted to avoid wasting the converter I purchased, and the hassle of having to dismount/mount the battery from the car to use it, and just use an AC outlet for spare tires/when in home, but yeah maybe I'm better just using the battery and recharging it if needed, thanks everyone for your replies