A regenerative inverter device, comprising: a converter unit configured to receive single phase AC power to output DC power; a capacitor unit configured to absorb DC power being output from the converter unit; an inverter unit configured to synthesize the absorbed DC power to output the drive power of a load; a converter controller configured to control the converter unit based on the single phase AC power and the output DC power of the converter unit, and an inverter controller configured to control the inverter unit based on the output voltage of the inverter unit, characterized in that wherein the converter controller comprises: a converter gate signal generator configured to control a plurality of gates contained in the converter unit; an input line harmonic voltage generator configured to output converter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the single phase AC power with the same size as that of the fundamental frequency component of the single phase AC power to an adder connected to the input side of the converter gate signal generator, and wherein the inverter controller comprises: an inverter gate signal generator configured to control a plurality of gates contained in the inverter unit; and an output line harmonic voltage generator configured to output inverter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the output voltage of the inverter unit with the same size as that of the fundamental frequency component of the output voltage of the inverter unit to an adder connected to the input side of the inverter gate signal generator. a converter unit configured to receive single phase AC power to output DC power; a capacitor unit configured to absorb DC power being output from the converter unit; an inverter unit configured to synthesize the absorbed DC power to output the drive power of a load; a converter controller configured to control the converter unit based on the single phase AC power and the output DC power of the converter unit, and an inverter controller configured to control the inverter unit based on the output voltage of the inverter unit, characterized in that wherein the converter controller comprises: a converter gate signal generator configured to control a plurality of gates contained in the converter unit; an input line harmonic voltage generator configured to output converter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the single phase AC power with the same size as that of the fundamental frequency component of the single phase AC power to an adder connected to the input side of the converter gate signal generator, and wherein the inverter controller comprises: an inverter gate signal generator configured to control a plurality of gates contained in the inverter unit; and an output line harmonic voltage generator configured to output inverter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the output voltage of the inverter unit with the same size as that of the fundamental frequency component of the output voltage of the inverter unit to an adder connected to the input side of the inverter gate signal generator. a converter gate signal generator configured to control a plurality of gates contained in the converter unit; an input line harmonic voltage generator configured to output converter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the single phase AC power with the same size as that of the fundamental frequency component of the single phase AC power to an adder connected to the input side of the converter gate signal generator, and wherein the inverter controller comprises: an inverter gate signal generator configured to control a plurality of gates contained in the inverter unit; and an output line harmonic voltage generator configured to output inverter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the output voltage of the inverter unit with the same size as that of the fundamental frequency component of the output voltage of the inverter unit to an adder connected to the input side of the inverter gate signal generator. an inverter gate signal generator configured to control a plurality of gates contained in the inverter unit; and an output line harmonic voltage generator configured to output inverter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the output voltage of the inverter unit with the same size as that of the fundamental frequency component of the output voltage of the inverter unit to an adder connected to the input side of the inverter gate signal generator.