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Discussion Starter · #1 ·
I have a used Solectria AC55-a motor and the phase wires were separated, so the motor has 12 leads. I need to know how to properly connect the leads.

The wires are labeled
1,1, 2,2, ... 6,6

When I used an ohm meter I discovered the wires of same windings were
(1 4),(1 4),(2 5)... I have six separate windings.

The problem is I have no idea how the windings are laid out in the motor, so I can't properly connect it.
I tried to email tech and product support @ azure dynamics, but the emails bounced. I also tried to search for the information, but it is seems like they have a pretty tight grip on good technical product documentation.

The way I look at it now, I have a couple options
a) someone on the forum has the answer
b) call azure dynamics and try to get the info
c) apply a test voltage to a winding and read the induced voltages on the other windings.
d) take it to a motor repair shop and ask them
e) crack the motor open and look at how everything is connected

Anyone have the answer or know of a good way/procedure to get the answer?
 

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Anyone have the answer or know of a good way/procedure to get the answer?


NEMA Nomenclature--6 Leads:
Constant Torque Connection
SpeedL1L2L3 Typical
Connection High 6 4 51&2&3Join2 WYE

Maybe like this. Don't take it to the bank. Check it out first. Best way is to get in contact with Azure. Keep trying. Or get in touch with a local EASA motor shop.

I think these motors were made by Lincoln Motor Division, no longer in business as such. Lincoln made standard NEMA motors and this was likely labeled as such. Hence my cut and paste above. But that is just a guess on my part :)

Oops, that didn't paste well at all. Looks like a parallel winding. Treat both 1's as a single, both 2's as a single, etc. Join 1, 2 and 3. Connect 4, 5, and 6 to L1, L2 and L3. L being the phase output from the inverter.

major
 

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Discussion Starter · #3 ·
Thanks Major.

I think you are right about treating the different windings as pairs.
(1 4)(1 4),(2 5)(2 5), and (3 6)(3 6). If this is correct then I have a dual voltage motor that can be configured in either a wye or delta configuration.

Based upon the original inverter only having 3 lines and no nuetral I was thinking the motor was originally connected in a delta configuration.

Next thing to figure out is if the motor needs to be wired for a "high" or "low" voltage. A real motor spec would be nice. 312 VDC on an AC motor spec isn't very helpful. http://metadope.com/Bus/pdf/AC55.pdf
 

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Discussion Starter · #4 ·
312 VDC on an AC motor spec isn't very helpful.
I take that back. Assuming 312 Vpeak from the inverter, Vrms = 220 V. 220 Vrms is reasonable for connecting the motor in a "low" voltage configuration.

I would guess the motor was originally a 208-220/440 3-phase 12 lead motor.

For a low voltage, delta configured motor.

Phase 1 - leads 1 & 6
Phase 2 - leads 2 & 4
Phase 3 - leads 3 & 5

Any objections/thoughts?
 
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