Abstract
This paper describes the control of a wireless power transfer system using a double DD coil structure, when the transmitter and the receiver coil are rotated to one another. WPT systems using single DD coils are rotationally dependent, due to the directional magnetic field generated by the DD transmitter coil. This rotational dependance can be mitigated by using a different transmitter structure. One such possibility is the usage of the double DD coil on the transmitter and the receiver sides. A double DD coil includes two directional DD coils, which can be excited separately. The coils inside the coil structure are perpendicular to one another, which allows higher power density and additional rotation tolerance. The proposed system was tested on a low power laboratory experimental setup.
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