Repurposing a stator

[modern_messiah]

Hi all,

Really quick question so that I don’t waste too much of your time/forum space. I am not looking to buy this motor but it raised a question that I was intrigued enough about to find an answer…

In reference to the following eBay auction.

The motor is high voltage, low current and low RPM. Clearly as a roller door motor and not something you'd use to power say - a car.

However - assuming the number of teeth on the stator is even, what’s to stop someone from using the stator to create a high speed 3 phase motor? New coil winding scheme, a new can, larger magnets etc. Basically everything new except the stator.

Or will the stator likely be ill suited to this task? Yes I am on the hunt for cheap but large stator cores because making custom designs are expensive!

Any guidance would be wonderful.

Thanks.

 

[Miles]

Hi m_m,

Have you seen this:
http://www.rbourgeois.com/induction_motors_laminations.a234.en.html
[link originally posted here by bigmoose IIRC]

 

[modern_messiah]

I should correct my original post - for a 3 phase motor I want an uneven number of stator teeth, obviously multiples of 3.

In regards to that link - I'm getting slightly confused reading the website. Do they sell pre-assembled motor stators or only the laminations in which case I'd need them assembled somehow. If I go to the page that seems the closest to what I want (see here) I can clearly see the stator core but what’s with the ‘rotor’ outer part. They seem to have name what I’d think would be the stator the rotor and the odd outer part the stator.

I’m very confused. And probably being very stupid…

 

[Miles]

Just the laminations, I think.

 

[modern_messiah]

Just the laminations, I think.

Hmmm well I don't think I'm quite ready to be assembling my own stator just yet...I wouldn't even know where to start.

In regards to my OP, do my comments still stand? Or repurposing something like that eBay motor be a waste of time?

 

[amberwolf]

If I go to the page that seems the closest to what I want (see here) I can clearly see the stator core but what’s with the ‘rotor’ outer part. They seem to have name what I’d think would be the stator the rotor and the odd outer part the stator.

That's correct: the Universal motor (can run on AC or DC) is a brushed motor. Also, it uses windings on both the stator (the outside part in this case) and the rotor (the inside part, often called Armature when including the commutator, that isn't shown in the pictures).

Just because it is the center part does not mean it is the stator. Stator is the "stationary" or non-rotating part of a motor, and may or may not have windings on it. Look up Inrunner and Outrunner, as well as Universal, Brushed, Induction, etc., and you'll find quite a variety of ways to build motors.

 

[modern_messiah]

I am aware of what the stator is - I think I jsut wrote what I was thinking down in an odd way....kind of typical of me :?

I'm not sure why but I was focusing on building an out runner more than an inrunner. Don;t ask me why - I think it's because I figure an out runner will generate more torque than an in runner of the same overall size.