A three stage power conditioning circuit

H - Electricity – 02 – H

Patent

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Details

H02H 9/00 (2006.01) H02J 3/00 (2006.01) H02H 9/04 (2006.01)

Patent

CA 2394853

A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over line, neutral and ground conductors includes first, second and third stages. The first stage provides voltage suppression and includes a set of three metal oxide varistors (MOVs). The second stage provides high frequency power suppression and includes three inductors coupled to the line, neutral and ground conductors, respectively, and to output lines. Each of the inductors prevents power at frequencies greater than the nominal frequency from reaching the output lines and each of the inductors may be rated to compensate for the capacitive impedance characteristics of a load supplied by the power conditioning circuit. The third stage provides voltage suppression and voltage clamping and includes an MOVs and a set of first and second rectifier diodes.

L'invention concerne un circuit de conditionnement d'énergie pour le conditionnement d'énergie fournie par une alimentation à une fréquence nominale sur des conducteurs d'alimentation, de terre et neutres, comportant des premier, deuxième et troisième étages. Le premier étage assure la suppression de la tension et comporte un ensemble de trois movistors (MOV). Le deuxième étage assure la suppression de l'énergie haute fréquence et comporte trois inducteurs couplés respectivement aux conducteurs d'alimentation, de terre et neutres et aux lignes de sortie. Chaque inducteur empêche l'énergie à des fréquences supérieures à la fréquence nominale d'atteindre les lignes de sortie et peut être calé pour compenser les caractéristiques d'impédance capacitive d'une charge alimentée par le circuit de conditionnement de puissance. Le troisième étage assure la suppression de la tension et le rétablissement de niveau de tension et comprend un MOV et un ensemble de première et deuxième diodes de redressement.

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