Patent ID: 7782037
Filing Date: 2010-08-24
Classification: H02M

Abstract:
1. A power conversion circuit in which two switching elements connected in series between an upper line of a high voltage and a lower line of a low voltage are provided; free wheel diodes connected reversely parallel to said respective switching elements are provided; said switching elements are turned ON and OFF; a dead time is set such that said switching elements connected in series are not turned ON at the same time; and an output is fetched from a midpoint of said two switching elements, said power conversion circuit comprising: a voltage sensor in which a voltage Vo of said midpoint a, a voltage Vc between said upper and lower lines, and a predetermined threshold voltage ΔV are input; and a state of Vo is determined by the values of Vo−ΔV and Vo−(Vc−ΔV), and the dead time of a command which is for controlling switching of said switching elements being compensated based on the results of the determination by said voltage sensor.