I have one of the 1 1/2Hp Chinese spindles here running off a 0.55Kw [ 3/4HP ] IMO Cub inverter, the cheap one, programmed for 150% overload and it runs fine with up to 6mm cutter in it.

Been running test cycles with this for about 4 hours, non stop at 24,000 rpm and no problem although it is a bit small and I wouldn't recommend it for continuous use or any larger cutter.
Cheers, Thanks for all the good advice. Now I know that the VFD/ inverters are affordable I will probablly forget the high rpm spindle and just use a router for wood, ( should keep Kip happy:nope:)Machine mart have a 2200W ali based one for £90 ish, Should be able to deal with Maple and such like