Dimmer circuit with improved inductive load imbalance...

H - Electricity – 05 – B

Patent

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Details

H05B 39/04 (2006.01) H02M 1/08 (2006.01) H02M 1/15 (2006.01) H05B 39/08 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2480413

A protection circuit for protecting a dimmer circuit controlling an inductive load including an imbalance detector for detecting an asymetrical operation in the load and circuit control means for causing the dimmer circuit to reduce a DC component in the load upon detection of the asymetrical operation. A load imbalance detector is also disclosed having a load DC component detector, a comparator and a signal generating means for generating means for generating a circuit shut down signal if the DC component exceeds a pre-set DC threshold.

L'invention concerne un circuit de protection de circuit gradateur contrôlant une charge inductive, qui comprend un détecteur de déséquilibre détectant toute asymétrie dans la charge et un système de contrôle de circuit, ce qui permet au circuit gradateur de réduire une composante C.C. dans la charge, au moment de la détection de l'asymétrie. L'invention concerne également un détecteur de déséquilibre de charge à détecteur de composante C.C. de charge, un comparateur et un générateur de signaux qui fournit un signal de fermeture de circuit si la composante C.C. excède un seuil C.C. préétabli.

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