Leo Lichtman wrote:
"JohnF" wrote: (clip) Could it be as simple as switching the 2 motor leads?
^^^^^^^^^^^^^^^^^
On a motor with permanent magnets for the field, it would be, but a motor
that large is going to have a wound rotor and a set of field windings.
Reverse either, but not both. If you reverse the connections to the
brushes, that should do it.


Yeah, that sounds like the best plan. A 40 Hp motor is going to have
commutating poles, and how you set up commutating poles on a reversible
motor gets complicated. Normally, I'd expect something like this to
just have a pair of big contactors to handle the reversing. Was this
a 4-quadrant servo drive? That's about the only reason I could think
of electronic reversing of a motor this size.

Jon