POWER CONVERSION APPARATUS

A converting section (20) is provided, which is configured to convert, by switching of a plurality of switching devices (Sr, Ss, St, Su, Sv, Sw, Sx, Sy, Sz), power from an AC power supply (6) into AC power having a predetermined frequency to output the AC power to a motor (5). A controller (40) is provided, which is configured to perform a torque control such that output torque of the motor (5) contains a power-supply pulsating component which is a pulsating component with the integer-fold of the frequency of output voltage of the AC power supply (6) and that the output torque of the motor (5) varies in association with variation in load torque of the motor (5), and which is configured to obtain a peak current value when the timing of the peak of the power-supply pulsating component and the timing of the peak of a load torque pulsating component are coincident or substantially coincident with each other and to reduce the variation range of the output torque such that the peak current value does not exceed a predetermined upper limit.