Ali Abdolkhani, Aiguo Patrick Hu
This paper presents a new face to face through-hole type contactless slipring system for wireless power transfer in rotary applications. Unlike the existing coaxial contactless slipring, the primary and secondary sides of the proposed system have identical structures that greatly simplify the system design. Moreover, the air gap between the primary and secondary sides of the system can vary, even with a barrier wall in between, without redesigning the dimensions of the system. A method of shielding the stray magnetic field using flexible type of ferrite materials has been presented and compared against the aluminium shielding. Besides the magnetic simulation study, a practical system is built and tested using a series tuned power pickup with a quality factor (QS) of 1.55 and output power of 367 Watts. The proposed system can be used for applications such as wind turbine pitch control and excitation systems of power generators.
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