Current source inverter device

摘要

A current source inverter device (2) according to an embodiment includes an inverter (11) that supplies AC power to a number n (integer of 1 or greater) of AC motors (3) each having a number m (integer of 2 or greater) of windings per phase; and a controller (20) that controls the inverter and AC motor. The inverter includes a switching unit, in which a number n×m+1 of switching elements (12) per phase are connected in series, and a number nxm of nodes among the switching elements are respectively connected with a number nxm of different windings with the same phase among the windings of the number n of the AC motors. The controller includes a mode selector (22) that selects at least one winding as a supply target of the AC power from the number nxm of the windings based on a rotation speed of the AC motor.