High efficiency power supply for a two-wire loop powered device

Details High efficiency power supply for a two-wire loop powered device High efficiency power supply for a two-wire loop powered device

G - Physics

05

F

G05F 1/10 (2006.01) G05F 1/56 (2006.01) G05F 1/66 (2006.01)

Patent

CA 2347890

A process control device is disclosed. The process control device comprises a measuring circuit (102) and a power regulator circuit (100). The measuring circuit (102) is coupled to the power regulator (100), and produces a control signal indicative of a measured value. The power regulator circuit (100) redirects a portion of the available power from the power regulator circuit (100) in proportion to the control signal produced by the measuring circuit (102) such that it does not limit available power to the measuring circuit (102). The process control device also may comprise a power control circuit (101) coupled to the measuring circuit (102). The power control circuit (101) redirects an amount of available power from the power regulator circuit (100) in proportion to the control signal. The process control device also comprises two or more conductors (106, 107) that are in electrical communication with the power regulator circuit (100) and the power control circuit (101). These conductors (106, 107) deliver the available power to the power regulator circuit (100) and the power control circuit (101), as well as receiving a first electric signal from the power regulator circuit (100) and a second electric signal from the power control circuit (101).

L'invention concerne un dispositif de commande de processus. Ce dispositif comprend un circuit de mesure (102) et un circuit de régulation d'alimentation (100). Le circuit de mesure (102) est couplé au circuit de régulation (100), et émet un signal de commande indicateur d'une valeur mesurée. Le circuit de régulation d'alimentation (100) réoriente proportionnellement une partie de l'alimentation disponible provenant dudit circuit de régulation d'alimentation (100) vers le signal de commande émis par le circuit de mesure (102), de sorte que la puissance disponible n'est pas limitée vers le circuit de mesure (102). Le dispositif de commande de processus peut également comprendre un circuit de commande d'alimentation (101) couplé avec le circuit de mesure (102). Ce circuit de commande d'alimentation (101) réoriente proportionnellement une quantité de l'alimentation disponible provenant du circuit de régulation d'alimentation (100) vers le signal de commande. Le dispositif de commande de processus comprend, en outre, plusieurs conducteurs (106, 107) en communication électrique avec le circuit de régulation d'alimentation (100) et le circuit de commande d'alimentation (101). Ces conducteurs (106, 107) fournissent l'alimentation disponible au circuit de régulation d'alimentation (100) et au circuit de commande d'alimentation (101), et reçoivent un premier signal électrique du circuit de régulation d'alimentation (100) et un second signal électrique du circuit de commande d'alimentation (101).

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