Inverter control device

H - Electricity – 02 – M

Patent

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Details

H02M 5/451 (2006.01) H02M 7/48 (2006.01)

Patent

CA 2051143

An inverter control device according to this invention comprises a current DC component detecting circuit for detecting the current DC components contained in at least two of the three phase output AC currents of the inverter, a DC magnetization suppressor signal generating circuit for producing two correcting signals from the current DC components, the two correcting signals being used to balance in amount the three voltage DC components contained in the three phase output AC voltage of the inverter respectively, an output reference correcting circuit for correcting two of first output references in accordance with the two correcting signals and outputting three second references including the two corrected values and one of the first output reference, and a gate control circuit for controlling the three phase output AC voltages of the inverter according to the three second output references.

Dispositif de commande d'onduleur. Comprend : un circuit de détection des composantes c.c. du courant contenues dans au moins deux des courants alternatifs de sortie triphasés de l'onduleur; un circuit générateur de signal suppresseur de magnétisation c.c. pour produire deux signaux correcteurs à partir des composantes c.c. du courant, les deux signaux correcteurs étant utilisés pour proportionner les trois composantes c.c. de tension contenues dans la tension c.a. de sortie triphasée de l'onduleur; un circuit correcteur de référence de sortie pour corriger deux des premières références de sortie conformément aux deux signaux correcteurs et produire trois secondes références comprenant les deux valeurs corrigées et une des premières références de sortie, et un circuit de commande de gâchette pour commander les tensions c.a. de sortie triphasées de l'onduleur conformément aux trois secondes références de sortie.

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