Patent ID: 7907427

Claim:
An inverter comprising: a diode bridge ( 11 , 21 ) that rectifies an inputted three-phase AC voltage into a DC voltage; an inverter section ( 12 , 22 ) that converts the DC voltage converted by the diode bridge ( 11 , 21 ) into an AC voltage and outputs the resulting voltage; an LC filter having an inductance element (L, L dc ) connected between one output terminal of the diode bridge ( 11 , 21 ) and one input terminal of the inverter section ( 12 , 22 ) and a capacitance element (C, C dc ) connected across input terminals of the inverter section ( 12 , 22 ); a voltage detecting section ( 24 ) that detects a cross terminal voltage of the inductance element (L dc ) of the LC filter; and a control section ( 100 , 200 ) that controls the inverter section ( 12 , 22 ) so that a transfer characteristic of an I/O voltage of the inverter section ( 12 , 22 ) becomes a characteristic close to a first-order lag system on the basis of the cross terminal voltage of the inductance element detected by the voltage detecting section ( 24 ).