A static converter might need to be substantially oversized for the motor it's running. I ran into problems running my lathe and mill using a converter I made from scratch. I eventually bought an off-the-shelf rotary converter from Phase-a-matic. You might look at their web page for insight.

A buddy runs his lathe off a static converter that is apparently sized correctly, but his motor takes a long time to get up to speed. One more thing, if you're going to run computer equipment, you'll probably need to be oversized and then filter the output from the converter.