Non resonant inductive power transmission system and method
AssigneePowermat Technologies Ltd.
InventorsYossi Azancot, Amir Ben-Shalom, Oola Greenwald, Arik Rofe, Alfred Lei-Bovitz, Moti Ashery
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Abstract
Non-resonant inductive power transmission wherein the driving voltage across a primary inductor oscillates at a frequency significantly different from the resonant frequency of the inductive coupling system. Embodiments of the invention include systems and methods for: power regulation using frequency control, fault detection using voltage peak detectors and inductive communication channels.
Claims30
An inductive power transfer system comprising at least one inductive power outlet comprising at least one primary inductive coil wired to a power supply via a driver;
- said primary inductive coil for forming an inductive couple having a characteristic resonant frequency with at least one secondary inductive coil wired to an electric load, said secondary inductive coil associated with an inductive power receiver wherein said driver is configured to provide a driving voltage across said primary inductive coil, said driving voltage oscillating at a transmission frequency significantly different from said characteristic resonant frequency of said inductive couple, said driving voltage oscillating at a transmission frequency higher than the resonant frequency of said inductive couple, wherein
- said primary inductive coil is further wired to a reception circuit comprising a voltage monitor for monitoring the amplitude of a primary voltage across said primary coil, and
- said secondary inductive coil is further wired to a transmission circuit for connecting at least one electric element to said secondary inductive coil thereby decreasing capacitance of the system;
- such that a control signal may be transferred from said transmission circuit to said reception circuit.
An inductive power transfer system comprising at least one inductive power outlet comprising at least one primary inductive coil wired to a power supply via a driver;
- said primary inductive coil for forming an inductive couple having a characteristic resonant frequency with at least one secondary inductive coil wired to an electric load, said secondary inductive coil associated with an inductive power receiver wherein said driver is configured to provide a driving voltage across said primary inductive coil, said driving voltage oscillating at a transmission frequency significantly different from said characteristic resonant frequency of said inductive couple, said driving voltage oscillating at a transmission frequency higher than the resonant frequency of said inductive couple, wherein
- said primary inductive coil is further wired to a reception circuit comprising a voltage monitor for monitoring the amplitude of a primary voltage across said primary coil, and
- said secondary inductive coil is further wired to a transmission circuit for connecting at least one electric element to said secondary inductive coil thereby decreasing inductance of the system;
- such that a control signal may be transferred from said transmission circuit to said reception circuit.
Dependencies are inferred from the claim text.