An AC processing pickup for IPT systems

This paper presents a new type of Inductive Power Transfer (IPT) pickup which directly regulates power in AC form, hence producing a controllable high-frequency AC source. The pickup has significant advantages in terms of increasing system efficiency, reducing pickup size and lowering production cost compared to traditional pickups that also produce a controlled AC output using complex AC-DC-AC conversion circuits. The new AC processing pickup employs switches operating under soft switching conditions to clamp parts of the resonant voltage across a parallel tuned LC resonant tank to achieve power regulation over a wide load range. A complete IPT system using the AC processing pickup is tested on a 500W lighting system and an efficiency of 96% is obtained when delivering 500W to multiple resistive light bulbs.

[1]  Grant A. Covic,et al.  The design of a contact-less energy transfer system for a people mover system , 2000, PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409).

[2]  A.P. Hu,et al.  Improved power flow control for contactless moving sensor applications , 2004, IEEE Power Electronics Letters.

[3]  Joung-Hu Park,et al.  Design of a contactless battery charger for cellular phone , 2001, IEEE Trans. Ind. Electron..

[4]  K. Brandisky,et al.  Resonant Contactless Energy Transfer With Improved Efficiency , 2009, IEEE Transactions on Power Electronics.

[5]  D.J. Thrimawithana,et al.  Analysis of Split-Capacitor Push–Pull Parallel-Resonant Converter in Boost Mode , 2008, IEEE Transactions on Power Electronics.

[6]  G. Covic,et al.  A New Concept: Asymmetrical Pick-Ups for Inductively Coupled Power Transfer Monorail Systems , 2006, IEEE Transactions on Magnetics.

[7]  G.A. Covic,et al.  Detection of the Tuned Point of a Fixed-Frequency LCL Resonant Power Supply , 2009, IEEE Transactions on Power Electronics.

[8]  B.H. Cho,et al.  Design of a transcutaneous energy transmission system using a series resonant converter , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[9]  John T. Boys,et al.  Stability and control of inductively coupled power transfer systems , 2000 .

[10]  Bo-Hyung Cho,et al.  An energy transmission system for an artificial heart using leakage inductance compensation of transcutaneous transformer , 1996 .

[11]  G.A. Covic,et al.  Self tuning pick-ups for inductive power transfer , 2008, 2008 IEEE Power Electronics Specialists Conference.

[12]  Yue Sun,et al.  A new contactiess power pick-up with continuous variable inductor control using magnetic amplifier , 2006, 2006 International Conference on Power System Technology.

[13]  Ping Si,et al.  Wireless power supply for implantable biomedical devices , 2008 .

[14]  A.P. Hu,et al.  Determining Multiple Steady-State ZCS Operating Points of a Switch-Mode Contactless Power Transfer System , 2009, IEEE Transactions on Power Electronics.

[15]  Xun Liu,et al.  Optimal Design of a Hybrid Winding Structure for Planar Contactless Battery Charging Platform , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[16]  Xun Liu,et al.  Mutual inductance calculation of movable planar coils on parallel surfaces , 2008, 2008 IEEE Power Electronics Specialists Conference.

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

[18]  S.C. Goldstein,et al.  Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers , 2009, IEEE Transactions on Power Electronics.

[19]  M. Eghtesadi,et al.  Inductive power transfer to an electric vehicle-analytical model , 1990, 40th IEEE Conference on Vehicular Technology.

[20]  Wentai Liu,et al.  Design and analysis of an adaptive transcutaneous power telemetry for biomedical implants , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[21]  A.P. Hu,et al.  Wireless Power Supply for Implantable Biomedical Device Based on Primary Input Voltage Regulation , 2007, 2007 2nd IEEE Conference on Industrial Electronics and Applications.

[22]  Aiguo Patrick Hu,et al.  Selected resonant converters for IPT power supplies , 2001 .

[23]  Aiguo Patrick Hu,et al.  A Frequency Control Method for Regulating Wireless Power to Implantable Devices , 2008, IEEE Transactions on Biomedical Circuits and Systems.