Sensor System to Aid the Vehicle Alignment for Inductive EV Chargers

被引:31
作者
Babu, Anish [1 ]
George, Boby [1 ]
机构
[1] Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India
关键词
Coil alignment; electric vehicle (EV); inductive power transfer (IPT); magnetically coupled systems; multiple sensors; wireless LC sensor; POWER TRANSFER;
D O I
10.1109/TIE.2018.2883193
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
For efficient power transfer in an inductive power transfer system, the primary coil, placed inside the charging pad, and the secondary coil, kept inside the vehicle pad, must be aligned correctly. Information about the real-time position of the electric vehicle (EV) with respect to the charging pad is required to aid the driver in the alignment of the two coils. This paper proposes a wireless LC-based scheme using three small sensing coils kept close to the primary coil, to detect the position of the EV. Each sensing coil has a capacitor connected to it, forming three LC tank circuits. The measurement circuit, which is connected to the secondary coil, measures the coupling coefficient between the secondary coil and each of the LC coils. Based on these values, the direction in which the EV should be driven to align the two coils is determined. This information is displayed to the driver. A prototype of the proposed scheme is designed and tested. Using the proposed scheme, the primary and the secondary coils are aligned correctly. This is verified by exciting the primary coil of the prototype by a power source at 50 kHz and measuring the induced voltage in the secondary coil, which is found to be the maximum when the two coils are aligned using the proposed scheme.
引用
收藏
页码:7338 / 7346
页数:9
相关论文
共 17 条
[1]   Analysis of the Mutual Inductance of Planar-Lumped Inductive Power Transfer Systems [J].
Acero, Jesus ;
Carretero, Claudio ;
Lope, Ignacio ;
Alonso, Rafael ;
Lucia, Oscar ;
Burdio, Jose M. .
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2013, 60 (01) :410-420
[2]  
Ahmadi A., 2015, WO Patent, Patent No. [2015/196 296 A1, 2015196296]
[3]   An Efficient Readout Scheme for Simultaneous Measurement From Multiple Wireless Passive LC Sensors [J].
Babu, Anish ;
George, Boby .
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2018, 67 (05) :1161-1168
[4]   How driver behaviour and parking alignment affects inductive charging systems for electric vehicles [J].
Birrell, Stewart A. ;
Wilson, Daniel ;
Yang, Chek Pin ;
Dhadyalla, Gunwant ;
Jennings, Paul .
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES, 2015, 58 :721-731
[5]  
Bosshard Roman, 2016, IEEE Power Electronics Magazine, V3, P22, DOI 10.1109/MPEL.2016.2583839
[6]   Modern Trends in Inductive Power Transfer for Transportation Applications [J].
Covic, Grant Anthony ;
Boys, John Talbot .
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, 2013, 1 (01) :28-41
[7]   Design of a High-Efficiency Wireless Power Transfer System With Intermediate Coils for the On-Board Chargers of Electric Vehicles [J].
Duc Hung Tran ;
Van Binh Vu ;
Choi, Woojin .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2018, 33 (01) :175-187
[8]   3-D Coil Positioning Based on Magnetic Sensing for Wireless EV Charging [J].
Gao, Yabiao ;
Duan, Chen ;
Oliveira, Aleff Antonio ;
Ginart, Antonio ;
Farley, Kathleen Blair ;
Tse, Zion Tsz Ho .
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION, 2017, 3 (03) :578-588
[9]   Dual-Purpose Nonoverlapping Coil Sets as Metal Object and Vehicle Position Detections for Wireless Stationary EV Chargers [J].
Jeong, Seog Y. ;
Kwak, Hyung G. ;
Jang, Gi C. ;
Choi, Su Y. ;
Rim, Chun T. .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2018, 33 (09) :7387-7397
[10]   Wireless Power Transfer for Electric Vehicle Applications [J].
Li, Siqi ;
Mi, Chunting Chris .
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS, 2015, 3 (01) :4-17