Power converter system and method

H - Electricity – 02 – M

Patent

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H02M 7/48 (2007.01) H02M 7/5387 (2007.01)

Patent

CA 2606369

A power converter system (12) for supplying an output voltage is provided. The power converter system is adapted to operate in a normal mode and a fault mode. The system comprises a plurality of bridges (14, ... 19, 90) and a plurality of transformers (20 ... 25) . The system further comprises a plurality of dc link capacitors (32 ... 37) , each coupled across a corresponding bridge. The system also includes a controller (11) adapted for, during the normal mode, switching each bridge with a respective normal phase shift. During the fault mode, the controller is adapted for switching each of the remaining ones of the bridges with a respective adjusted phase shift to generate the output voltage. During the fault mode, at least one of the plurality of bridges is bypassed.

L'invention concerne un système de conversion de puissance (12) destiné à fournir une tension de sortie. Le système de conversion de puissance est conçu pour fonctionner dans un mode normal et dans un mode de défaillance. Le système comprend une pluralité de ponts (14, ... 19, 90) et une pluralité de transformateurs (20 ... 25). Le système comprend également une pluralité de condensateurs de liaison c.c. (32 ... 37), chacun couplé à un pont correspondant. Le système comprend en outre un contrôleur (11) conçu pour, au cours du mode normal, commuter chaque pont à l'aide d'un déphasage normal respectif. Au cours du mode de défaillance, le contrôleur est conçu pour commuter chacun des ponts restants à l'aide d'un déphasage réglé respectif afin de générer la tension de sortie. Au cours du mode de défaillance, au moins un pont de la pluralité de ponts est court-circuité.

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