Method and system for multiphase current sensing

G - Physics – 01 – R

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G01R 29/16 (2006.01) H02J 3/26 (2006.01) H02P 21/14 (2006.01)

Patent

CA 2713403

A multiphase current sensing method wherein the sum of the phase currents is zero including: sensing a.c. and/or d.c. currents in first and second phases; sensing a.c. current in a predetermined a.c. frequency range in a third phase; and combining the current sensed in the first and third phases and the second and third phases and determining a gain correction factor to be applied to the currents sensed in the first and second phases.

L'invention porte sur un procédé de détection de courant polyphasé dans lequel la somme des courants de phase est nulle, le procédé consistant: à détecter des courants alternatifs et/ou continus dans des première et seconde phases ; à détecter un courant alternatif dans une plage de fréquence de courant alternatif prédéterminée dans une troisième phase, et à combiner le courant détecté dans les première et troisième phases et les seconde et troisième phases, et à déterminer un facteur de correction de gain à appliquer aux courants détectés dans les première et seconde phases.

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