Switching technique for efficient electrical power utilization

Details Switching technique for efficient electrical power utilization Switching technique for efficient electrical power utilization

G - Physics

05

F

G05F 1/70 (2006.01) H02J 3/18 (2006.01)

Patent

CA 2676164

An active phase angle correction circuit which corrects the phase angle between voltage and current in an AC supply varies the capacitive loading of the AC mains to reduce the phase angle to near zero by detecting the phase angle, reactively and resistively loading the AC mains in steps until the phase angle is at a desired level close to zero, and then maintaining or incrementally adjusting the loading. The applied loading may be continuously switched in and out at a rate much greater than the mains supply frequency.

L'invention concerne un circuit de correction d'angle de phase active qui corrige l'angle de phase entre une tension et un courant dans une alimentation AC en faisant varier la charge capacitive du secteur AC pour réduire l'angle de phase pratiquement à zéro en détectant l'angle de phase, en chargeant de manière réactive et résistive le secteur AC par étapes jusqu'à ce que l'angle de phase soit à un niveau voulu proche de zéro et, ensuite, en maintenant ou ajustant de manière incrémentielle la charge. La charge appliquée peut être commutée en continu à une cadence beaucoup plus grande que la fréquence d'alimentation de réseau.

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