DIY Rotary Phase Converter KITs, for 7.5HP-230VAC 3-Phase MotorsAUcontrols. DIY Rotary Phase Converter Kit Model ARPC 7 For 35 HP, 3 Phase AC Motors Made in the USA Build your own 7. 5 HP, 230V, 3 Phase Rotary Phase Converter using standard 230V single phase power. This kit is ideal for running: A 3~5 HP, 3 Phase motor at full power, or A 7. 5 HP motor at 85% of capacity What's Required All you need is a 7. 5 HP, 230V, 3 Phase motor (1750 or 3500 RPM, new or used) to act as your idler generator motorthis generates