A power conversion device, comprising: a first multi-phase inverter and a second multi-phase inverter, which are configured to receive a DC voltage output from a DC power supply, and execute power conversion to convert the DC voltage into AC voltages and then output the resultant AC voltages; a drive voltage command calculation unit configured to calculate first multi-phase drive voltage commands and second multi-phase drive voltage commands, which cause the first multi-phase inverter and the second multi-phase inverter to drive a load based on an external control command; a first average voltage adjustment unit configured to output, as first multi-phase voltage commands, values obtained by adjusting the first multi-phase drive voltage commands with use of a first offset voltage, to thereby control the first multi-phase inverter; a second average voltage adjustment unit configured to output, as second multi-phase voltage commands, values obtained by adjusting the second multi-phase drive voltage commands with use of a second offset voltage, to thereby control the second multi-phase inverter; characterized in that the power conversion device further comprises a voltage adjustment control unit configured to, when the DC voltage of the DC power supply is represented by Vdc, a frequency of a PWM signal of each of the first multi-phase inverter and the second multi-phase inverter is represented by fc, and a lower limit frequency defined by noise regulation to which the power conversion device is required to conform is represented by fr, control the first average voltage adjustment unit and the second average voltage adjustment unit so that an absolute value (Vave_dif_abs) of a differential voltage (Vave_dif) being a difference between: a first average voltage (Vave1), which is an average value of the first multi-phase voltage commands of respective phases as command values for the AC voltages to be output from the first multi-phase inverter; and a second average voltage (Vave2), which is an average value of the second multi-phase voltage commands of respective phases as command values for the AC voltages to be output from the second multi-phase inverter, is equal to a value derived from Expression: k2 * fc / fr * Vdc V where k2 represents an odd number equal to or more than one. a first multi-phase inverter and a second multi-phase inverter, which are configured to receive a DC voltage output from a DC power supply, and execute power conversion to convert the DC voltage into AC voltages and then output the resultant AC voltages; a drive voltage command calculation unit configured to calculate first multi-phase drive voltage commands and second multi-phase drive voltage commands, which cause the first multi-phase inverter and the second multi-phase inverter to drive a load based on an external control command; a first average voltage adjustment unit configured to output, as first multi-phase voltage commands, values obtained by adjusting the first multi-phase drive voltage commands with use of a first offset voltage, to thereby control the first multi-phase inverter; a second average voltage adjustment unit configured to output, as second multi-phase voltage commands, values obtained by adjusting the second multi-phase drive voltage commands with use of a second offset voltage, to thereby control the second multi-phase inverter; a voltage adjustment control unit configured to, when the DC voltage of the DC power supply is represented by Vdc, a frequency of a PWM signal of each of the first multi-phase inverter and the second multi-phase inverter is represented by fc, and a lower limit frequency defined by noise regulation to which the power conversion device is required to conform is represented by fr, control the first average voltage adjustment unit and the second average voltage adjustment unit so that an absolute value (Vave_dif_abs) of a differential voltage (Vave_dif) being a difference between: a first average voltage (Vave1), which is an average value of the first multi-phase voltage commands of respective phases as command values for the AC voltages to be output from the first multi-phase inverter; and a second average voltage (Vave2), which is an average value of the second multi-phase voltage commands of respective phases as command values for the AC voltages to be output from the second multi-phase inverter, is equal to a value derived from Expression: k2 * fc / fr * Vdc V where k2 represents an odd number equal to or more than one.