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One method not mentioned could be to rectify single phase 110V 60Hz to 220V 50Hz, and feed it to a modified DC motor. For a shunt-type DC motor, a set of slip-rings can be added to the rotor, and each slip ring connected to sections of the commutator 120 degrees apart. This will generate a three-phase voltage across the slip-rings, with a frequency converter to control the speed of the motor. The connection can be done with 3 standard single phase 110V 60Hz to 220V 50Hz converter. The primaries are connected the typical way but the secondary being connected to provide (2) 120V outputs. L1 and L2 to neutral with L1&L2 has a 220V.
One of the easiest methods to create three phase power from single phase, assuming your single phase is actually two phases - 180 degrees opposed is to utilize a 110V 60Hz to 220V 50Hz frequency converter along with capacitance. You connect the two phases you have to the motor and connect the third leg of the motor utilizing capacitors connected also to the two phases. The capacitor will "pull" the two phases apart and the unloaded motor will then act as a source for three phase power up to near its horsepower limit.
