110V 60Hz to 220V 50Hz converter

50Hz/60Hz frequency converters have been used to accept 220 volt single phase and will output 3 phase but need to be derated for the higher input phase currents. You statement does not provide any parameters such as voltage/capacity/application that would help in pointing towards a potential solution.

Depends on the current/power needed to be drawn from the output of the frequency converter and the application/load type, you can easily modify a 3 phase/3 phase double conversation UPS to use single phase input instead of 3 so you can get 3 please output from single phase power source.

A simple 110V 60Hz to 220V 50Hz converter can be created by connecting two phases of a 3 phase motor (unloaded) to a single phase source and connecting the correct amount of capacitance between the two phases of power and the third phase of the three phase motor. Output is determined by the 3 phase motor HP.

A single phase to three phase converter can be used with matching capacitor to phase shift your load is fine for small, lets say less that 1kVA frequency converter. Plenty of home hobbies to, do this as they buy a 2nd hand I dustrial rated drilling machine for thier basement, but 3 phase rated, against a single phase installation. Cheap and cheerful. So, lots of 60Hz 110V to 50Hz 220V frequency converters, but it depends on the detail.

Use 1-phase to 3-phase converter. In which you have to give 1-phase to rotor of generator and output will be 3-phase from stator. Only thing is that this converter generator should be design in winding in such a way so that rotor winding will induce 3-phase supply from stator. You can get voltages with different phase angle displacements by using different auto transformer connections using a 110V 60Hz to 120V 50Hz converter. It depends on how you connect your Tee from the primary of the single phase winding.