Patent ID: 7835165
Filing Date: 2010-11-16
Classification: H02M

Abstract:
1. A power converting apparatus including a plurality of three-phase converters for converting AC power into DC power which are operated parallel to one another with inputs and outputs of the three-phase converters connected in parallel, wherein said power converting apparatus detects an input AC current, an input AC voltage and individual output DC currents of said plurality of three-phase converters and corrects AC-side voltage commands for said individual three-phase converters in a manner that reduces a difference between the output DC currents using the detected input AC voltage, input AC current and the individual output DC currents, and wherein said individual three-phase converters are controlled by using d- and q-axis voltage commands, a d-axis voltage correction value is calculated based on said individual output DC currents, and said d-axis voltage command is corrected by adding and subtracting said d-axis voltage correction value to and from said d-axis voltage command.