A novel target detection algorithm for capacitive power transfer systems

Jeong, Chae-Ho; La, Phuong-Ha; Choi, Sung-Jin; Choi, Hee-Su

doi:10.1109/apec.2018.8341555

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…Additionally, their detection methods are also presented. An algorithm is proposed in low power CPT applications based on target detection [186]. Herein, the value of transmitter side capacitance is observed depending on whether foreign objects enter the system or not.…”

Section: ) Foreign Objectmentioning

confidence: 99%

“…CLC-CLC [307] 0. • Simplified models for living and non-living foreign objects [182] • Reduced electric field emission [183] • More compact [184] • Easy to implement [186] • No extra sensing circuit [186] • Cost effective [186] • High efficiency [187] • High occupied space [182,187] • More influence of parasitic components [183] • Require extra circuitry [182,186] • High computation burden [183] • Increased cost [182,187] • Relatively low efficiency [184] • More sensitive to horizontal misalignment [184] Voltage Stress…”

Section: ) Multiple Transmitters/receiversmentioning

confidence: 99%

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A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from µW to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from µm range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.INDEX TERMS Capacitive power transfer, capacitive coupling, wireless power transfer.MEHMET ZAHID EREL was born in Sakarya, Turkey. He received the B.S. degree in electrical engineering from the Yildiz Technical University, Istanbul, Turkey, in 2013, and the M.S. degree in electronics and communication engineering from the Ankara Yildirim Beyazit University, Ankara, Turkey, in 2016. He is currently pursuing the Ph.D. degree with the department of electrical and electronics engineering,

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Section: ) Foreign Objectmentioning

confidence: 99%

Section: ) Multiple Transmitters/receiversmentioning

confidence: 99%

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

et al. 2022

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“…When a foreign object is present, the capacitive coupling and transmission performance of the CPT system will be affected. Moreover, when a living object approaches the transmission plates, it will experience a strong electric field, and if the living object touches a metal plate with a high voltage, a current will flow inside the living body to the ground [104][105][106][107][108]. Therefore, to maintain the transmission performance and prevent safety problems, FOD in the CPT system needs to be considered in the future.…”

Section: Conclusion and Future Challengesmentioning

confidence: 99%

Foreign Object Detection for Electric Vehicle Wireless Charging

Xia

Yuan

et al. 2020

Electronics

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Wireless power transfer technology is being widely used in electric vehicle wireless-charging applications, and foreign object detection (FOD) is an important module that is needed to satisfy the transmission and safety requirements. FOD mostly includes two key parts: metal object detection (MOD) and living object detection (LOD), which should be implemented during the charging process. In this paper, equivalent circuit models of a metal object and a living object are proposed, and the FOD methods are reviewed and analyzed within a unified framework based on the proposed FOD models. A comparison of these detection methods and future challenges is also discussed. Based on these analyses, detection methods that employ an additional circuit for detection are recommended for FOD in electric vehicle wireless-charging applications.

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“…Most FOD methods were designed for IPT systems [1,19,21,24,25]. Often, they can be categorized into external sensor-based, such as thermal imaging or radar, and parameter-based, such as impedance or quality factor measurement [21,25].…”

Section: Introductionmentioning

confidence: 99%

Matrix Persymmetry Analysis for Misalignment and Foreign Object Detection in Resonant Capacitive Power Transfer

Herpers,

Rouse

2024

IEEE Access

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This paper introduces a persymmetry evaluation of capacitance matrices for resonant capacitive power transfer. Persymmetry analysis of the capacitance matrix indicates imbalances and allows for distinction between misalignments and foreign objects. Misalignment and foreign object detection are achieved with a parameter-based method. Voltages on the transmitter side of a resonant capacitive power transfer link are leveraged for detection. Simulations and supporting measurements were performed with a 13.56 MHz resonant capacitive power transfer link incorporating a six-plate structure for electric vehicle charging applications. Metallic and living tissue objects can be detected with the foreign object detection method. Furthermore, lateral misalignment and its direction are detectable for realignment purposes. Simulations show that the foreign object detection range is sufficient to avoid exceeding the basic restrictions for electromagnetic field exposure for kW-range power transmission. The capacitance matrix persymmetry results indicate that both lateral misalignment and foreign object detection are achievable and distinguishable with the parameter-based method. This work introduces practical solutions to detecting imbalances in resonant capacitive power transfer systems, which may improve reliability and safety in applications such as electric vehicle charging and electrified roadways.INDEX TERMS Capacitance matrix persymmetry, electric vehicle charging, foreign object detection, misalignment detection, resonant capacitive power transfer, wireless power transfer.

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A novel target detection algorithm for capacitive power transfer systems

Cited by 5 publications

References 6 publications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications

Foreign Object Detection for Electric Vehicle Wireless Charging

Matrix Persymmetry Analysis for Misalignment and Foreign Object Detection in Resonant Capacitive Power Transfer

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