Grid side regulation of wireless power charging of plug-in electric vehicles

Conductive charging of plug-in and battery electric vehicles (PEV's) is now well established and becoming more pervasive in the market. Conductive charger regulation of vehicle regenerative energy storage system (RESS), or battery pack charge rate is controlled by the dedicated on-board-charger (OBC) in coordination with the vehicles battery management system (BMS). Wireless Power Transfer (WPT) charging of PEV's is a relatively new and emerging technology that will not benefit from standardization work until 2014 or later. As such, various approaches are currently underway to manage the power flow from the grid-tied high frequency power inverter to the vehicle RESS. WPT regulation approaches can be secondary side only, primary side only or a combination of both. In this paper Oak Ridge National Laboratory (ORNL) envisions a system that is fast charge compatible and that minimizes the vehicle on board complexity by placing the burden of power regulation on the grid side converter. This paper summarizes the ORNL approach and experimental lessons learned at the National Transportation Research Center WPT laboratory1.

[1]  Ching-Tsai Pan,et al.  A Closed-form Oriented Compensator Analysis for Series-parallel Loosely Coupled Inductive Power Transfer Systems , 2007, 2007 IEEE Power Electronics Specialists Conference.

[2]  Grant A. Covic,et al.  Development and evaluation of single sided flux couplers for contactless electric vehicle charging , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[3]  Leigh Page,et al.  Principles of Electricity , 1931 .

[4]  Robert D. Lorenz,et al.  A design methodology for multi-kW, large air-gap, MHz frequency, wireless power transfer systems , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[5]  R. Becker.  Electromagnetic fields and interactions , 1982 .

[6]  Y. Nagatsuka,et al.  Compact contactless power transfer system for electric vehicles , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[7]  Grant A. Covic,et al.  A bipolar primary pad topology for EV stationary charging and highway power by inductive coupling , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[8]  Hiroshi Sakamoto,et al.  Ferrite core couplers for inductive chargers , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).

[9]  J. T. Boys,et al.  Design and Optimization of Circular Magnetic Structures for Lumped Inductive Power Transfer Systems , 2011, IEEE Transactions on Power Electronics.

[10]  H. H. Wu,et al.  A review on inductive charging for electric vehicles , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[11]  Ching-Tsai Pan,et al.  A Primary-Side Control Strategy for Series-Parallel Loosely Coupled Inductive Power Transfer Systems , 2007, 2007 2nd IEEE Conference on Industrial Electronics and Applications.

[12]  Srdjan Lukic,et al.  Optimal resonant tank design considerations for primary track compensation in Inductive Power Transfer systems , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[13]  H. H. Wu,et al.  Design of Symmetric Voltage Cancellation Control for LCL converters in Inductive Power Transfer Systems , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[14]  R. Mecke,et al.  High frequency resonant inverter for contactless energy transmission over large air gap , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[15]  Sungwoo Lee,et al.  On-Line Electric Vehicle using inductive power transfer system , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[16]  Takehiro Imura,et al.  Basic experimental study on helical antennas of wireless power transfer for Electric Vehicles by using magnetic resonant couplings , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.