Most likely it would work most of the time. However, I would be somewhat
concerned about what might happen if the load on the motor changed
suddenly. In such a case the motor might stall with the VFD continuing to
drive an AC sequence at high frequency since it has no feedback about the
motor movement.

With an induction motor, there would still be torque in such a situation
and if the load on the motor became slightly lighter the motor would begin
to spin again. With a permanent magnet motor, there woudn't be much torque
at all when the slip is so extreme so it would require resetting the VFD or
manually slowing it down until there was sufficient torque again to get the
motor spinning. During this time when the slip was extreme the motor could
be getting quite hot.


Sean


On Sun, Aug 5, 2018 at 12:17 PM, Jason White <
whitewaterssoftwareinfo@gmail.com> wrote:

> Hello,
>
> I am working on rewiring a small CNC mill. For the spindle the existing
> unit has the following brushless DC motor with hall effect sensors (see
> attached drawing). It is rated at 160V, 7A.
>
> Could this motor be driven by a VFD intended for conventional 3-phase AC
> induction motors? As I understand it most 3-phase AC motors are 220Vac
> which would suggest that the answer is no.
>
> For this application I do no care about slippage or precise speed.
>
> Thanks,
> Jason White
>
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