Abstract: A system and method for protecting against overvoltage in a vehicle assembly of an electric vehicle, wherein the vehicle assembly is in communication with a ground assembly as a part of a wireless power transfer system for electric vehicles, are provided herein.
Abstract: A system and method for reducing harmonics in a rectified incoming wireless power transfer signal at a receiver of an electrical vehicle are provided herein. The electrical vehicle receiver shall be equipped with a two-stage filter which shall reduce the harmonics post rectifying of the alternating current inducted at the receiver coils. Advantageously, using a specially designed capacitor, an effective reduction of the harmonics is achieved for power efficiency and electromagnetic compliance (EMC). The design is challenging due to the high amperage and frequency range of the alternating current.
Abstract: A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.