Method for processing pwm waves and devices therefor

Details Method for processing pwm waves and devices therefor Method for processing pwm waves and devices therefor

H - Electricity

02

M

H02M 1/00 (2007.01) H02M 1/12 (2006.01) H02M 7/5395 (2006.01)

Patent

CA 2218738

A method for processing PWM waves for a voltage inverter or a voltage- controlled rectifier, including at least one pair of switches. said inverter or rectifier being controlled by a modulator and a discriminator. According to the method, two set waves corrected according to the current direction in the load or the source are applied to the discriminator. The corrected set wave for the output current has a high level to which a delay is added during transition from the high level to the low level, and the corrected set wave for the input current has a low level to which a delay is added during transition from the low level to the high level. The high level is defined by the fact that the switch connected to the most positive load is closed while the switch connected to the most negative lead is open, and the low level is defined by the reverse.

Procédé de traitement d'ondes PWM destinées à un onduleur de tension ou à un redresseur commandé de tension, comprenant au moins une paire de commutateurs, cet onduleur ou redresseur étant commandé par un modulateur et un discriminateur, caractérisé en ce que l'on applique au discriminateur deux consignes corrigées en fonction du sens du courant dans la charge ou dans la source, la consigne corrigée pour le courant sortant présentant un état haut augmenté d'un délai lors de la transition de l'état haut vers l'état bas, et la consigne corrigée pour le courant entrant présentant un état bas augmenté d'un délai lors de la transition de l'état bas vers l'état haut, l'état haut étant défini par le fait que le commutateur relié à la charge la plus positive est fermé tandis que le commutateur relié à la charge la plus négative est ouvert, l'état bas étant défini par l'inverse.

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