Device for driving an electromagnetic pump and related...

F - Mech Eng,Light,Heat,Weapons – 04 – B

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F04B 17/04 (2006.01) F04B 13/00 (2006.01) F04B 49/06 (2006.01)

Patent

CA 2614325

Device for driving an electromagnet (4) for operating a pump, as well as the related method and the related dosing electromagnetic pump, the electromagnet (4) comprising a primary winding (3) and a moving element (9), capable to be attracted within the primary winding (3) when an energising current is higher than a first threshold value so as to let a liquid dose into an external hydraulic circuit depending on the travel of the moving element (9), the device comprising a control logic unit (6), capable to control said energising current, the device being characterised in that the control logic unit (6) is capable to detect said energising current so as to provide said energising current to the primary winding (3) until said energising current assumes a second threshold value, depending on a value of the liquid dose to let into the external hydraulic circuit, higher than the first threshold value and not higher than a third threshold value in correspondence of which the moving element (9) arrives at stop.

La présente invention concerne un dispositif d'attaque d'électro-aimant (4) destiné à faire fonctionner une pompe ainsi qu'un procédé associé et la pompe électromagnétique de dosage associé. L'électro-aimant (4) comprend un enroulement principal (3) et un élément mobile (9) capable d'être attiré à l'intérieur de l'enroulement principal (3) lorsqu'un courant énergisant est supérieur à une première valeur seuil de façon à laisser une dose de liquide dans un circuit hydraulique externe dépendant du trajet de l'élément mobile (9), ce dispositif comprenant une logique de commande (6) capable de commander ce courant énergisant. Ce dispositif se caractérise en ce qu'une logique de commande (6) est capable de détecter ce courant énergisant afin de fournir ce courant énergisant a l'enroulement principal (3), jusqu'à ce que ce courant énergisant atteignent une deuxième valeur seuil, dépendant d'une valeur de la dose de liquide à laisser dans le circuit hydraulique externe, supérieure à la première valeur seuil mais inférieure à une troisième valeur seuil pour laquelle l'élément mobile arrive à l'arrêt.

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