Patent ID: 7505292

Claim:
A device for controlling an electric power converter, comprising: DC voltage supply lines, conversion means having at least three legs connected between said DC voltage supply lines and outputs, said conversion means for converting said DC voltage into output AC voltages, and control means for controlling turn-on of said legs of the conversion means, said control means comprising: processing means for receiving first modulation signals of control signals of said legs and outputting at least one corresponding modulation signal, current detection means for detecting at least a first current in at least one of the outputs of the legs of said conversion means, and means for generating an over-modulation control signal, wherein said means for generating an over-modulation control signal is for receiving a first detection signal from said current detection means corresponding to the detected first current, selecting at least one modulation signal of the first modulation signals for receiving an over-modulation, and for generating a first over-modulation control signal according to such first detection signal and such first modulation signals.