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Roadway Inductive Power Transfer depends on robust and reliable primary magnetic couplers (pads), but existing pads use large quantities of ferrite, a brittle magnetic material. This paper presents two variations on the Double D topology to reduce or remove the ferrite thereby making the system more robust, using an additional coil to help shape the field instead. Simulations and laboratory validations...
Shaping of the magnetic field between the primary and secondary coils of Inductive Power Transfer Systems is crucial for system performance and to keep leakage within emissions guidelines. This paper gives an overview of different methods used to shape the magnetic field, followed by work done by the authors looking into one of these methods for use in an electric vehicle charging application using...
Inductive power transfer is becoming increasingly popular in stationary electric vehicle charging systems due to improved designs. However, such optimizations are normally performed for matched topologies which are similarly sized, over constant air gaps and without significant misalignment. In a real situation where the primary and secondary pads may not be matched and may be misaligned, pad designs...
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