Apparatus and method for charging and discharging a...

H - Electricity – 02 – M

Patent

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H02M 3/338 (2006.01) H01L 41/04 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2495486

An apparatus using electrically stimulated smart material requires a power source to stimulate the material. This power source has three main functions, (1) to apply a known voltage potential across the smart material, (2) to convert from the control voltage to a level suitable for the smart material, and (3) to regulate the voltage based on a control input. The power source is a DC to DC converter with special properties achieved by supplying a variable stimulating voltage or actively discharging the actuator. The circuit also provides a dead band, or hysteresis, between the charge point and discharge point. When this circuit is applied with a proportional, mechanically leveraged smart material actuator, a general-purpose industrial actuator becomes a cost-effective solution.

Un appareil utilisant un matériau intelligent stimulé électriquement nécessite une source électrique pour stimuler ledit matériau. Cette source électrique possède trois fonctions principales : (1) appliquer un potentiel de tension connu au matériau intelligent, (2) convertir la tension de commande à un niveau acceptable pour le matériau intelligent et (3) réguler la tension d'après une entrée de commande. La source électrique est un convertisseur CC/CC possédant des propriétés spéciales par l'intermédiaire de la fourniture d'une tension de stimulation variable ou de la décharge active de l'actionneur. Le circuit comprend également une zone morte, ou hystérésis, entre le point de charge et le point de décharge. Selon l'invention, l'utilisation de ce circuit avec un actionneur de matériau intelligent proportionnel à amplification mécanique permet d'obtenir un actionneur industriel à usage général constituant une solution rentable.

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