H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 3/56 (2006.01) G01R 15/18 (2006.01) G05F 7/00 (2006.01) H01F 27/38 (2006.01)
Patent
CA 2489329
The invention relates to a device and method for low-frequency magnetic field compensation in an inductive signal coupling unit.According to the invention, the coupling unit comprises a ferromagnetic core (30) which surrounds a conductor through which a low-frequency current (1) flows, in order to inject a high-frequency signal therein. The invention is characterised in that it consists in detecting the current (1) flowing through the conductor or the magnetic field (3) generated in the coupling unit, producing a supply current from the value obtained during the aforementioned detection process and injecting the supply current produced in the coupling unit via a low pass filter (9), in order to generate a magnetic field (4) that is equal, but in the opposite direction to that produced by the current (1) from the conductor in the above-mentioned coupling unit, such as to prevent saturation of the magnetic core (30) without adding insertion losses. In general, the invention can be used for communication systems that require the injection of a radiofrequency signal in a conductor and, in particular, in systems using the electrical network as a transmission means.
L'invention concerne un procédé de compensation de champ magnétique de basse fréquence dans une unité de couplage de signal inductive. L'unité de couplage comprend un noyau ferromagnétique (30) disposé autour d'un conducteur traversé par un courant (1) de basse fréquence pour lui injecter un signal de haute fréquence. Le procédé consiste à détecter le courant (1) traversant le conducteur ou le champ magnétique (3) produit dans l'unité de couplage, à obtenir un courant de compensation à partir de la valeur détectée, et à injecter le courant de compensation obtenu dans l'unité de couplage par un filtre passe-bas (9) pour produire un champ magnétique (4) égal et de sens contraire à celui produit par le courant (1) du conducteur dans l'unité de couplage et ainsi éviter la saturation du noyau magnétique (30) sans ajouter des pertes d'insertion. L'invention s'applique globalement à des systèmes de communication qui requièrent l'injection d'un signal RF sur un conducteur, et en particulier à des système qui utilisent le réseau électrique comme moyen de transmission.
Blasco Claret Jorge Vicente
Poveda Lerma Antonio
Diseno de Sistemas En Silicio S.a.
Marks & Clerk
LandOfFree
Device and method for low-frequency magnetic field... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and method for low-frequency magnetic field..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for low-frequency magnetic field... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1556297