Design of an improved type rotary inductive coupling structure for rotatable contactless power transfer system

This paper is aimed at analyzing the rotary inductive coupling structure of contactless rotary transformer. The main feature of the proposed rotatable contactless power transfer system is which winding is coaxial-interlayered for improving the magnetic coupling capability. There is no ferrite core used in the secondary-side of the rotary inductive coupling structure, this helps to ease the exerted force that is stress by the secondary-side on spindle. In order to verify the feasibility of the proposed contactless power transfer system for rotary applications, an inductive powered rotary machinery and the control system have been integrated. The experimental results show that the maximum power transfer efficiency of the proposed rotary inductive coupling structure is about 94.8%. The maximum output power received in the load end is 1030 W with transmission efficiency of 88%.

[1]  Aiguo Patrick Hu,et al.  A Double Stator Through-hole Type Contactless Slipring for Rotary Wireless Power Transfer Applications , 2014, IEEE Transactions on Energy Conversion.

[2]  Alessandra Costanzo,et al.  A 1-kW Contactless Energy Transfer System Based on a Rotary Transformer for Sealing Rollers , 2014, IEEE Transactions on Industrial Electronics.

[3]  Grant Covic,et al.  Design considerations for a contactless electric vehicle battery charger , 2005, IEEE Transactions on Industrial Electronics.

[4]  Aiguo Patrick Hu,et al.  Modelling and analysis of a capacitively coupled contactless power transfer system , 2011 .

[5]  J. K. Reed,et al.  Capacitive Power Transfer for Rotor Field Current in Synchronous Machines , 2012, IEEE Transactions on Power Electronics.

[6]  William Chen,et al.  Design challenges of wind turbine generators , 2009, 2009 IEEE Electrical Insulation Conference.

[7]  Xun Liu,et al.  Optimal operation of contactless transformers with resonance in secondary circuits , 2008, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition.

[8]  Konstantinos D. Papastergiou,et al.  An Airborne Radar Power Supply With Contactless Transfer of Energy—Part I: Rotating Transformer , 2007, IEEE Transactions on Industrial Electronics.