Building single to three-phase converters is easy now.
Modules contain a controller and all the power capacitors, prewired.
ME for unbalanced outputs, ranges are 2kW, 3kW, 4kW, 8kW.
Use them to power machines with standard motors.
MT for balanced output, ranges are 4kW, 8kW, 12kW, 16kW, 24kW.
Use them for CNC machines, inverter welders, plasma cutters.
Modules require a standard generator motor to work.
They may require a single phase step up or down transformer if the single phase input voltage is different from the three-phase output voltage.