ROTARY MACHINE AND DRIVE SYSTEM THEREFOR

PROBLEM TO BE SOLVED: To suppress electric corrosion of a bearing in a drive system in which a rotary machine is driven by an inverter.SOLUTION: A drive system for a rotary machine comprises a rotary machine including two pairs of three-phase winding wires and two pairs of inverters connected to the same DC power source, and AC terminals of the two pairs of inverters are connected to the three-phase winding wires of each pair of the rotary machines, respectively. In the rotary machine, a stator is formed by housing the winding wires in a plurality of slots, and the two pairs of three-phase winding wires are included. Winding of the winding wires of the same phase in each pair is started from a slot position where the phases of the plurality of slots are different from each other by an electric angle of 180°, and finished at a slot position where the phases are different from each other at an electric angle of 180°. The winding end points of the three-phase winding wires in each pair are commonly connected, respectively, and AC voltages of equal magnitude and inverted phases are applied to the two pairs of three-phase winding wires.