Help identify this motor

[mikey5791]

Hi all forum members,
Found this unknown motor discarded in a junk yard and took home for learning experience. By the look of it, I suspect it is taken out from a type of air blower probably running on ac power. I used digital multimeter on ohm/resistance scale and it doesn't read anything on those 2 black wires. So, this motor is not shorted and should be good to run.

Correct me if i am wrong on the initial test.
Can anyone kindly advice on how to test run this motor based on visible external two black wires. Fyi, i don't see any marking on the motor body nor smell anything burning. Appreciate for any kind of hint or help.

[redwire]

It looks like a vacuum cleaner motor, like a home built-in type.
These "universal motors" will run on AC or DC, you can apply even 12V and give it a spin.
It will have thermal cutouts/fuses and I think should have continuity on the black wires unless they blew.

[mikey5791]

It looks like a vacuum cleaner motor, like a home built-in type.
These "universal motors" will run on AC or DC, you can apply even 12V and give it a spin.
It will have thermal cutouts/fuses and I think should have continuity on the black wires unless they blew.

Thanks for the reply.
Fyi, i applied 12vdc from a computer psu but it does not spin. Then i applied 12vac from a wall wart adapter, it does not spin either. Didn't see any thermal cutouts /fuses but i tested for continuity from the spade connector to the black wire and it has continuity. I did the same continuity test on the other spade connector to the other black wire and it has continuity too.
Any other suggestions please kindly share.
Thank you.

[stj]

the wires are the field coil because it doesnt have fixed magnets
you need to also power the brushes - if they are still in it

[mikey5791]

the wires are the field coil because it doesnt have fixed magnets
you need to also power the brushes - if they are still in it

How do i power the brushes? Fyi, i am clueless on which component are the brushes.

[petehall347]

brushes rub on that shiny copper part .

[stj]

it's a deceptive name, your looking for a pair of carbon blocks with springs behind them

[redwire]

I don't see any carbon brushes or the holders for them. They must be missing, taken off.

[mikey5791]

I don't see any carbon brushes or the holders for them. They must be missing, taken off.

Yes, the carbon brushes or holders are confirmed missing. I used a string to measure the outer diameter of the shiny part (commutator) and it is about 10cm.
My next questions are:
1) Is it possible to get the right kind/size of carbon brushes with springs behind
2) Any item i can use to hold the carbon brushes or modded item as holder of the brushes
3) Is it possible to get this motor running after the first two issues are resolved?

Looking forward for any kind of help to get this motor working.

[stj]

unless the motor has some numbers on it to id it - very unlikely your getting it fixed.
what your looking for are brass (usually) tubes with the sprung carbon block in it and a plastic mounting of some kind - so it doesnt short to the frame
https://yt.artemislena.eu/watch?v=PfnRiB6ZFwA

[redwire]

You can search for "vacuum cleaner motor" and find one that matches what you have for looks (image results). It will be used in several different makes/models i.e. Ametek Lamb and look on eBay.
Brushes and holders and brackets/screws will cost a lot, so I would abandon the project. You don't know if the stator and rotor work (shorted turns) and the thermal fuses are in the braided spaghetti sleeves if they are OK.

[mikey5791]

Hi all,
Thanks for all the help and suggestions received so far. It is very likely i will abandon this project to revive the motor due to the cost of finding brushes and holders unless i come across the same motor again.

However, i gained more knowledge on "vacuum cleaner motor" and its related component which will be useful if i ever encounter another similar incident.