your V/Ω would be upper bound.
Be aware you'll get somewhat less because the current in your armature tends to oppose the flux from your magnet.
I dont know how to calculate that. But this link suggests that these rare earth magnets' equivalent amp-turns per meter is quite substantial, well in the tens of thousands... with just 36 turns and modest current my intuition says you'll be okay.. but it is a guess.
in fact it's an interesting site, nice glossary and tables.....
you know to keep air gap as small as possible and have a complete magnetic circuit.