Foreign Object Debris Detection and Automatic Elimination for Autonomous EV Wireless Charging Application

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Aqueel Ahmad ◽  
Mohammad Saad Alam ◽  
Yasser Rafat ◽  
Samir M. Shariff ◽  
Ibrahim S. Al-Saidan ◽  
...  
Keyword(s):  
Wireless Charging ◽  
Foreign Object ◽  
Automatic Elimination

Foreign Object Debris Detection and Automatic Elimination for Autonomous Electric Vehicles Wireless Charging Application

2020 ◽  
Vol 9 (2) ◽  
pp. 93-110
Author(s):  
Aqueel Ahmad ◽  
◽  
Mohammad Saad Alam ◽  
Yasser Rafat ◽  
◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Wireless Charging ◽  
Foreign Object ◽  
Element Analysis ◽  
Power Circuit ◽  
Modeling And Analysis ◽  
Detection Techniques ◽  
Foreign Objects ◽  
Living Objects ◽  
Automatic Elimination

Power pad designing, misalignment reduction, safety, automation, living object detection (LOD), and foreign object debris (FOD) detection are the key challenges in the commercialization of the high voltage wireless charging of Electric Vehicles (EV). The interruption from unwanted and sensitive foreign objects such as metal objects and living objects over the charging pads is an immense challenge for the static wireless charging of EV. In this manuscript, the problem of interference due to foreign objects and living objects has been analyzed, and an innovative laser- and sensor-based FOD detection method is proposed and verified by developing a prototype setup. Modeling and analysis of the effects of foreign objects have been performed using Finite Element Analysis (FEA) in Ansys Maxwell® environment. The analysis compares the consequence of the presence of foreign objects on the wireless charging power pad. The proposed method utilizes laser light and sensor for the detection and two-dimensional signal processing for the elimination of FOD. The proposed method is compatible with all types of static wireless charging systems without interrupting the power transfer and power circuit. The proposed system has been analyzed and compared with the various available FOD detection techniques. The feasibility of the proposed system has been assessed with the help of an on the bench hardware prototype implementation in the lab environment.

Method for metal foreign object detection in wireless charging system of electric vehicle

Sensor Review ◽  
2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xinning Tang ◽  
Yong Dai ◽  
Yunhui Ma ◽  
Bingyin Ren
Keyword(s):  
Electric Vehicle ◽  
General Scheme ◽  
Complex Signal ◽  
Resonant Circuit ◽  
Wireless Charging ◽  
Foreign Object ◽  
Time Sharing ◽  
Content Type ◽  
Exciting Frequency ◽  
Detection Coil

Purpose This study aims to solve the problem of the existing metal foreign object (MFO) detecting systems, which are not sensitive to the small size MFO in wireless charging region of electric vehicle (EV) because of the extremely complex signal noise in the process of wireless charging of EV. Design/methodology/approach A method for MFO detection based on the principle that MFOs can cause mistuned resonance of detection coil resonant circuit is proposed. The general scheme of detecting system is proposed. The design method for detection coils which is effective to small MFOs detection in large-area region of wireless charging of EV is presented. The design of time-sharing driving circuit and amplifying circuit of high frequency exciting signal for detection coils is introduced. The design scheme of signal processing circuit (including filter and rectifier) of detection coil terminal voltage is also proposed. Findings The influence of exciting frequency of detection coils on detecting sensitivity and the anti-noise feature of system are analyzed according to the experiment results. Originality/value The experiment of MFO detection indicates that the proposed method can effectively detect the coin-sized small MFO in the process of wireless charging of EV.

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