Abstract
This paper deals with a wireless power transfer system where a novel structure of transmitting/receiving double DD coils is applied. This system uses two identical double D (DD) transmitter coils stacked on each other to transfer power to two stacked receiver coils. The power is transmitted simultaneously and independently through both transmitter coils to the receiving coils. The magnetic field of the first coil does not interfere with the second coil. Both transmitter and receiver coils are placed on each other and occupy the same footprint, so there is no need for increased space. This can lead to an interesting wireless power transfer system—from single load to double the load and higher power transfer density.
Highlights
The results show that the double DD coupler structure enables higher power density compared to the single DD coupler
This paper presents a double DD IPT coupler structure that can be used instead of a single circular nonpolar coupler or a polar DD coupler
The proposed coupler structure consists of two DD coils stacked on top of each other and perpendicular
Summary
The coupling coefficient is dependent on the distance and horizontal misalignment between the transmitter and receiver coils. Due to the rotation between the two DD coils on the transmitter side, the coils are not coupled magnetically and can transfer power independently to their counterparts on the receiving side. This results in higher power density and uniform misalignment tolerance compared to a single DD coil.
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