Device and method for controlling a converter and electric converter comprising one such device

Control device of an electric power converter comprising control means controlling turn-on of power semi-conductor legs,

• said electric power converter comprising:
• a DC power supply comprising a first line of positive voltage, a second line of negative voltage, and a third line of intermediate voltage connected to a common point of filtering capacitors connected to said first line and to said second line,
• conversion means having at least three legs connected between said positive, negative or intermediate voltage lines and outputs to supply at least one output voltage,
• control means controlling turn-on of said legs of the conversion means,
• said control means comprising processing means to supply modulation signals of control signals of said legs,
• said control means comprising:
• regulating means in conjunction with means for determining a general control component,
• voltage signal inputs to supply said regulating means with signals representative of voltages between said positive, negative and intermediate voltage lines, or of the variations of the intermediate voltage, and
• current signal inputs to supply said regulating means with current signals representative of output currents of the converter legs,
• said means for determining the general control component determining the general control component according to said modulation signals, to said signals representative of voltages and to said signals representative of currents to take part in regulation of the intermediate voltage.