Failed ME1616 motor

[Spoondrifter]

I have a ME1616 liquid cooled motor that has failed. The sevcon controller showed a 3 code. I sent the controller back to the manufacturer and he put it on a dyno machine and it works fine, meaning the motor was the issue. Can the motor be diagnosed better, or disassembled and repaired? Any info on how to do that?

 

[A-DamW]

Can the motor be diagnosed better, or disassembled and repaired? Any info on how to do that?

Well, grab a multi-meter and check all three motor phase wires for continuity, shorting to case, balanced resistance between all three phases, etc.
Does the shaft spin freely? (other than cogging torq)
AFAIK, that is an internal magnet motor (IPM), so unless the magnets were overheated the their curie point, it is probably a winding issue.
In my opinion, out of all the components of a typical electrical drive system, the motor is by FAR the easiest to diagnose.

 

[Spoondrifter]

All three phase wires read open circuit to case. Motor spins reasonably freely ie definitely not locked up.

 

[j bjork]

What is supposed to be the problem, should it be something with the phases?
It is probably more likely to be a sensorproblem if the motor hasent been very hard pushed or waterdamaged.

 

[Spoondrifter]

There is nearly 600 hours in the motor. It was pushed pretty hard for about one minute of time, then about 30 minutes later it quit throwing the 3 code. The controller checks out fine, pointing to the motor as the issue. My question is how to further diagnose the motor and determine if it is repairable.

 

[j bjork]

Does code 3 means that it should be a problem with the phases? Like shorted or so.

To know for sure that there is no problem with the phases you can use a isolation tester that sends 500v when it measures the resistance to the housing. Or open the motor and look at the windings to make sure there are no discoloration and try to move them a little while you measure resistance to the stator.
If not, maybe it can be a sensorproblem. Then depending of the sensortype you can look at the signal with an oscilloscope or maybe a simple hall sensor tester. Or maybe just start with checking the wiring to the sensor.