Just stay away from generic and go with a name brand like Hitachi WJ200 or others. The old direct drive motor will be tough but also expensive to rewind. If speeding up, I'd stay below 70 hz. Keep the braking quite slow unless you add a resistor. Not all vfds allow for that but I'd want that capability. Direct drive jointers can take a long time to coast down and the head is a lot of mass to slow. Give ten seconds a try and see if the vfd faults. Don't get crazy starting and stopping with only the internal resistor.
Once you get used to three phase you won't like single. Dave