Re: [CAD_CAM_EDM_DRO] Re: AC-servomotors

bolttjza wrote:

>>You need to find out whether these are permanent magnet or
>>induction motors, and what the characteristics of the encoders
>>are. That will be needed to find out which servo amps are capable
>>of driving this motor.
>>
>>Jon
>>
>>
>
>I disassembled one of the motors. The Armature is lamanated and is a
>permanent magnet. The motor has a resolver (sin/cos?)
>
>
>

If those are rare earth motors, that one is now junk. The magnets are
often so strong that they lose their strength when removed from the
stator, which acts as a keeper.

But, anyway, then they are usually called "brushless DC" motors, although
that is a misnomer. The signals from a resolver can be converted into
sine/cosine signals. But, the servo amp will most likely have that
circuitry
in it.

Jon