You can reverse the rotation by reversing the wires on one winding.

Nope, I just tested it right now, It does not change rotation if I change the AC wires on one winding. It works for DC, but not for AC. I had to try it, even if I knew it, is good to refresh memory from time to time.

 

If you short all the terminals, does the shaft get harder to turn/spin?

I didnt power anything on the 80V motor, I am not sure what to power.
All this time I was speaking with @MrChips was about the 70V motor.

OOOO, so I should short all the terminals, and see if the rotor get harder to turn/spin?
I get you now ! Tricky Chicky-Bricky ! I'll do it now. One moment please.

 

I shorted all the pins and the rotor is spinning as usual, not harder that when not shorted.

 

Nope, I just tested it right now, It does not change rotation if I change the AC wires on one winding

Doesn't sound right to me!

 

I shorted all the pins and the rotor is spinning as usual, not harder that when not shorted.

Then it is not a PM field motor.
The winding details would need to be observed to help determine type.

 

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I believe it is exactly like the other 2 motors before, but the 3rd coil is this bottom coil:

I believe the same circuit will apply to this one as well. We will figure out what the 3rd coil is doing later after we see it spinning.
Correct?
My very wild guess, the 3rd coil might be some sort of emergency break?
Oh and I just checked all the components with a demagnetized screwdriver, and NO permanent magnet inside.

 

I am guessing the AB pair goes to the wound sensor on the rear of the motor?
It has the appearance of a 3ph motor, can you see the nature of the rotor? Squirrel cage?

 

yes... I believe the same as you.
this is the rotor part that is on the same level

with this stator part:

You can see there are teeth on both of them, on the inner rotor black rotor part and also on the stator with the coil on it.

 

OK the entire motor is assembled like this:

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I would expect continuity between all four C,D,E,F. ?
If so it has the appearance of 3phase.
Does the central shaft turn in the outer housing? or fixed?

 

I will put it to the test now.
I modified the old circuit with the new notations.
It should be good. We will see soon enough.

 

I would expect continuity between all four C,D,E,F. ?

I tested every permutations, I told you already. It is no continuity between C,D,E,F.
Only AB, then only CF, then only DE. Thats it.
It looks very much like the other ones before.

 

I make it work !
It is exactly as the other ones as I suspected and exactly the same behaviour.
Firstly I changed 2 pins between them to resemble my old diagram.
And when I connected everything, it worked like a charm.
I keep the extra 2 pins floating, unconnected.
I only concentrated on the 4, obvious ones.
Hey, thanks for staying with me !!! Both of you.

Here is the new-updated-improved-more logical working and tested diagram:


Now, I really-really need a power supply for these motors! All 3 of them.
Heeelp! I know is hard... but is not impossible, especially with you in the room.

 

If some surplus transformers can be found, the secondary's could be modified by taking turns off as needed.

 

Thank you!
That was my thought for a very long time as well (in the perspective I will make these motors work -and now I did).
But the biggest problem, these transformers are super expensive. And after buying them, modifying them... a bit too risky for me.
Im not saying I will not do it, im saying is a good plan B if everything else fails. And I will need 3 of them !

Im more inclined towards a SMPS. I dont know how to make it, but I hope some of you can... and we can build it toghether from components I already have scrapped. I have a good bunch of SMPS transformers scrapped along the years. I believe that is the most critical component in building a SMPS. Can you engage into making this SMPS with me? I do want to learn a thing or two as well. So it is double fun. Hehe. Triple fun for you as well. So fun all around, see?

 

I would figure the components themselves for driving those motors at 50hz would be approaching the transformer cost, is there no surplus depots there?
You will need transformers for the SMPS anyway.

 

My collection of transformers that I scrapped along the years :

The grid I have on the paper on the table translates to:

Easy to measure something from a single view. ( Edited: not 1cm but 5mm)
I also keep my fingers in the picture for you to easily compare how big/small these chokes are.
I do have something, and I will gladly present everything I have, if you find 2 of them for 70V and 1 for 80V, to pacify each motor.

 

I just look carefully and they are not having any helpful labels on them.
We will have to test them somehow. I do have a LCR transistor tester that is capable of measuring inductors. So we should be good, I only need the data, what values to measure and to confirm if I have the correct transformer or not.

 

Doesn't look like they have the right Va