Multiple Comb Pattern Based Living Object Detection with Enhanced Resolution Design for Wireless Electric Vehicle Chargers

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 6Language: englishTyp: PDF

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Thai, Van X.; Park, Jun H.; Jeong, Seog Y.; Rim, Chun T. (Gwangju Institute of Science and Technology, South Korea)

A living object detection (LOD) system for wireless electric vehicle (EV) chargers including multiple comb-pattern capacitor topology in order to enhance the sensing sensitivity is proposed in this paper. The capacitance changes of the sensor caused by a nearby living object is sensed by a specially built parallel-resonant circuit, which verifies the appearance of the living object. The simulation comparison between the proposed topology and the conventional one proves that more than 50% of sensing sensitivity is increased. Moreover, the design trade-off between high sensitivity and small coupling capacitance is solved in the paper by simulation and experiments. A prototype of the proposed LOD system was built to verify the feasibility. The sensing sensitivity of the system is measured as 30%, which is large enough for detecting living object.