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Electromagnetic Model-Based Foreign Object Detection for Wireless Power Transfer
DOI:10.1109/TPEL.2021.3100420.png)
摘要
En 中文
Foreign objects near wireless power transfer (WPT) systems are fire hazards that must be detected. In this article, a new accurate method is presented for foreign object detection based on an electromagnetic model for WPT. Foreign objects are detected by quantifying the deviation from a normal model. This deviation is caused by the foreign object's additional electromagnetic coupling. Advantages of this new method include invariance to receiver coil misalignment, and power level, allowing low-power detection prior to startup. Electromagnetic model-based foreign object detection was demonstrated in hardware to detect a 2 cm diameter U.S. nickel coin, a small disposable lighter, and a saline proxy for a living animal in a kilowatt-level wireless power transfer system, using a prestartup power of only 7 W. Furthermore, foreign objects can be detected regardless of an Rx coil misalignment of up to 10 cm. This article is accompanied by an instructional video.
Keyword:
Voltage measurement
Measurement
Object detection
Current measurement
Wireless power transfer
Eddy currents
Sensor arrays
Charging
diagnostics
electric vehicles (EVs)
electromagnetic modeling
faraday coil
foreign object detection
measurement
metal object detection
noncontact sensors
sense coil
wireless power transfer (WPT)
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期刊
IF:
6.5
论文数:
1.7W
被引数:
8.3W
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