Electrics for dummies

[Anonymous-0]

Can I run a 12v DC motor off a battery charger ?

 

[farmer boy]

You might be able to run a small motor off the charger. I know you can run a light off the charger but that's just under 5 amps.

 

[Anonymous-0]

Sorry - I should have been more specific.
I'm thinking something like a sewing machine motor and controller to ad to my bead roller.

 

[Anonymous-0]

If you want to fry the charger or the motor.

 

[old]

Depends a lot on the charger and the motor. I use my big battery charger that has a 200 amp boost on it to test starter motors all the time but I also don't use it very long just long enough to see if the starter will spin then unhook it. You need to find out what the amp draw is of the motor and then make sure your charger will put out more then that amp draw because on start up the motor pulls almost twice the amps it does when its running
Hobby farm

 

[tiresntracks]

I ran the blower motor for my travel trailer furnace for several years with a 10 amp battery charger. It should work fine with smaller motors.

 

[JDemaris]

All depends on the motor and the charger. Many of the older battery chargers were built to be power supplies also, often up to a steady 30 amps DC. Not so common anymore unless you spend some extra money.

 

[John T]

Chuck, as usual Im in Olds camp on this one cuz I say the correct answer can only be PROBABLY BUT IT DEPENDS.

The MAIN thing to consider is that battery charger (depends on its size and design) may be pumping out a relatively (as compared to a battery for sure) choppy unregulated unfiltered pulsing DC wave which may cause a lil more heat in the motor.

Another thing is the relative size and capacity of the charger versus motor requirements cuz if the charger is wayyyyyyyy bigger then the motors amp load I see less of a problem versus the motor was really sucking down about allllll the charger can deliver.

Im NOT sayin it wont work just that my answer to be on the safe side has to be like Olds IT DEPENDS. Id feel muchhhhhhhhhhhh better if you had a battery sittin there to absorb the chargers pulses n smooth n steady out the current being suppled to the motor n it can still work fine n fill your needs and keep the batetry charged provided the chargers big enough.

John T

 

[Daniel Bear Kelley]

The transformer for electric trains (the old analog ones anyway) were glorified battery chargers. No reason it can't work, given the charger puts out enough amps and roughly the same voltage. You can always add circuitry to smooth out the waveform, if the motor heats too much.

 

[Anonymous-0]

Small fan motor yes. Larger type like a starter motor or for a winch or grain auger ? NO

 

[Bob]

For the kind of power you'll need, get an AC motor and VFD (variable frquency drive).

ebay auction # 140193618818 is ONE example.

Below is a link to phase converters and VFD's.

Ignore the phase converters, VFD's are what you would be interested in.
VFDs