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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...
The majority of commercial contactless power-transfer systems used in manufacturing applications can only tolerate limited movement of the power pickup relative to the track to which it is magnetically coupled. This paper describes a new multiphase (quadrature) pickup that significantly improves the tolerance of the power receiver to such relative movement, enabling expanded applications such as continuously...
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