Low voltage, two-level, six-pulse induction motor controller...

H - Electricity – 02 – P

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Details

H02P 27/14 (2006.01) H02M 7/483 (2007.01) H02P 25/02 (2006.01)

Patent

CA 2493586

A method and circuit enabling off-the-shelf controllers designed for use with a two-level AC drive inverter bridge (1920) to drive inverter bridges with three-or-more levels. Signals from an ordinary induction motor controller or a two-level induction motor controller (2200) are used to drive the twelve-or- more switches of a three-or-more level inverter bridge (1920), as are used in medium-and-high voltage applications. The proper sequence and timing of switching for the three-or-more-level inverter bridge is based in-part upon either the output of the six pulse-width modulators, or the output of the flux and torque control device, or the voltage control device (2210), of the two- level controller (2200).

L'invention concerne un procédé et un circuit permettant à des unités de commande existantes, conçues afin d'être utilisées avec un pont inverseur en courant alternatif à deux niveaux, de commander des ponts inverseurs avec trois niveaux ou plus. On utilise des signaux provenant d'une unité de commande ordinaire d'un moteur d'induction, ou provenant d'une unité de commande ordinaire d'un moteur d'induction à deux niveaux, utilisées dans des applications de tension moyenne à élevée, afin de commander les quelques douze commutateurs, ou plus, d'un pont inverseur à trois niveaux ou plus. La séquence et la synchronisation appropriées de commutation du pont inverseur à trois niveaux, ou plus, repose en partie soit sur la sortie des six modulateurs de largeur de bande, soit sur la sortie du dispositif de commande de couple et de flux, soit sur le dispositif de commande de tension, de l'unité de commande à deux niveaux.

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