Inductive power supply with duty cycle control

Details Inductive power supply with duty cycle control Inductive power supply with duty cycle control

H - Electricity

02

J

H02J 5/00 (2006.01) H02J 7/02 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2711489

An inductive power supply (100) that maintains resonance and adjusts duty cycle based on feedback from a secondary circuit. A controller (110), driver circuit (111) and switching circuit (115) cooperate to generate an AC signal at a selected operating frequency and duty cycle. The AC signal is applied to the tank circuit (120) to create an inductive field for powering the secondary..The secondary communicates feedback about the received power back to the primary controller (110). The power transfer efficiency may be optimized by maintaining the operating frequency substantially at resonance, and the amount of power transferred may be controlled by adjusting the duty cycle.

L'invention concerne une alimentation électrique inductrice (100) qui maintient la résonance et ajuste le cycle de marche en se fondant sur une rétroaction d'un circuit secondaire. Une unité de commande (110), un circuit pilote (111) et un circuit de commutation (115) coopèrent pour générer un signal alternatif à une fréquence de service sélectionnée et un cycle de marche sélectionné. Le signal alternatif est appliqué au circuit réservoir (120) pour créer un champ inducteur pour alimenter le circuit secondaire. Le circuit secondaire communique une rétroaction concernant la puissance reçue en retour à l'unité de commande primaire (110). Le rendement de transfert de puissance peut être optimisé en maintenant la fréquence de service sensiblement à la résonance, et la quantité de puissance transférée peut être commandée en ajustant le cycle de marche.

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