Patent ID: 8878482

Claim:
A power converting apparatus comprising: a DC power supply; an inverter including upper-arm switching devices for n phases (where n is an integer equal to or larger than 3), each of the upper-arm switching devices having one end connected to a positive side of said DC power supply and lower-arm switching devices for the n phases connected in series with the upper-arm switching devices of the respective phases, each of the lower-arm switching devices having one end connected to a negative side of said DC power supply, said inverter being configured to supply AC voltages for the n phases to an inductive load which is connected to connecting points between the upper-arm switching devices and the lower-arm switching devices of the individual phases by controlling the upper-arm switching devices and the lower-arm switching devices to turn on and off; a current sensor for detecting a current that flows between said DC power supply and said inverter; an ON/OFF signal generating unit for outputting ON/OFF signals to the upper-arm switching devices and the lower-arm switching devices; a timing signal generator provided in said ON/OFF signal generating unit for generating timing signals used for setting timings at which currents of the individual phases flowing into said inductive load are detected; a phase determination signal generator provided in said ON/OFF signal generating unit for generating phase determination signals used for determining the phase of the current that flows in said current sensor at each of the timings set by the timing signals; and a detected current correction unit for determining detected current values fed from said current sensor at the timings set by the timing signals and phases of the detected current values on the basis of the timing signals and the phase determination signals and correcting the detected current values for the individual phases obtained at the individual timings during specific periods to represent values which would be obtained at a specific reference timing, wherein said detected current correction unit corrects the detected current values for the individual phases obtained at the individual timings during the specific periods to represent the values which would be obtained at the specific reference timing on the basis of a voltage value of said DC power supply and an inductance value of said inductive load.