rotary converter is easiest.
I use a 5 HP 3Ø 1500 RPM motor which I start up with caps, when up to speed, switch caps off with 3 sec. timer.
Use cap. around 150µF 400 Volts.
Feed from 16 Amps C curve MCB from 230 Volts 50 Hz supply.
Sometimes I have to give the 3Ø motor a push at the heavy pulley which is providing the inertia, if it doesn't start first time.
I then have acces to 3 x 230 Volts at the motor terminals which I use to drive a 3Ø 3000 RPM motor which drives an 80 Amps 12 Volts alternator for experiments or charging the car accu quickly when the kids have turned the car light on overnight at the odd occasion and drained the car accumulator.
