Dual-purpose non-overlapped coil sets as foreign object and vehicle location detections for wireless stationary EV chargers

Sonapreetha, M. R.; Jeong, Seog Y.; Choi, Su Yeon; Rim, Chun T.

doi:10.1109/wow.2015.7132803

Cited by 30 publications

(10 citation statements)

References 20 publications

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“…The detection method based on a passive induced voltage deviation focuses on the electromagnetic coupling effect of the metal object, where the change in the EMF causes an induced voltage deviation of the additional detection coil [58][59][60][85][86][87][88][89][90][91][92] or the tunable magnetoresistive (TMR) sensor [57]. The equivalent circuit is shown in Figure 10.…”

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

“…The equivalent circuit is shown in Figure 10. In [58][59][60][85][86][87][88][89][90][91][92], the induced voltage deviation of the additional detection coil was always utilized to verify the distorted EMF between the transmission coils in the presence of metal objects. The detection coil was always located on the transmitting pad and contained two reverse direction or symmetric direction coil loops to cancel the induced voltage generated by the transmitting coil.…”

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

“…In [85], multiple open-circuited, single-turn sensing coils placed above the Tx worked as the detection coil. In [86], a group of two divided coil loops or two reverse-direction overlapped coil loops acted as the detection coil, while in [59,60,87,88], many pairs of non-overlapped coil loops were installed in parallel as the detection coil, with each pair of coil loops having two reverse-direction symmetric coils that could be divided or connected in reverse. The integrated non-overlapped coil structure is proposed in [89] and the statistical model of induced voltage in detection coils are used for MOD.…”

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

“…Changed electromagnetic field (EMF) [57][58][59][60][85][86][87][88][89][90][91][92] The operating time of the detection methods also needs to be considered. If the detection method can be implemented before charging, the metal object can then be found and removed before the object absorbs energy from the WPT system.…”

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

“…The metal object, which tends to couple with the transmission coils due to the eddy current effect, is modeled as an equivalent LR circuit, where the mutual inductances (M 13 and M 23 ) and self-inductance (L 3 ) correspond to the EMF coupled to the metal object, and the resistance (R 3 ) corresponds to the eddy current losses of the metal object. The capacitance effects of the metal object are always neglected according to references [55,[58][59][60]. If an additional detection circuit which always uses the detection coils as the detection equipment exists, a similar EMF coupling effect occurs and the additional detection circuit can be represented by an opened LR circuit.…”

Section: Rmentioning

confidence: 99%

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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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Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

Section: (C) Detection Methods Based On a Passive Induced Voltage Devimentioning

confidence: 99%

Section: Rmentioning

confidence: 99%

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Foreign Object Detection for Electric Vehicle Wireless Charging

Xia

Yuan

et al. 2020

Electronics

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A critical review on inductive wireless power transfer charging system in electric vehicle

Geetha

Usha

2022

Energy Storage

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Considering a prospect where a driverless electric vehicle (EV) requires an automatic charging system that does not need a person to do anything. In this case, there is a need for a fully automated, fast, safe, cost‐effective, and reliable charging infrastructure that can be used for EVs and other EVs. This infrastructure must also be profitable and allow for quick adoption in electric transportation systems. Wireless charging methods may allow you to understand these characteristics. Wireless power transfer (WPT) is a future technology that offers flexibility, convenience, safety, and the capacity to be automated. Due to its high efficiency and ease of maintenance, resonant inductive wireless charging should get more attention in WPT techniques than other WPT methods. This literature provides an overview of the status of Resonant Inductive Wireless Power Transfer Charging technology, as well as a look at the current and prospects of the wireless EV industry. First, the article provides a brief history of wireless charging technologies, outlining the benefits and drawbacks. Then, the research assists in a comparative analysis of various types of WPT methodologies, control strategies, and compensation networks that have been done so far. The static and dynamic charging procedures, as well as their features, are shown. To increase charging power, a novel approach to the usage of superconducting materials in coil designs is examined, and their potential influence on wireless charging is highlighted. The detailed role and importance of power electronics, as well as the many types of converters utilized in diverse applications, are highlighted. The batteries and their management systems, as well as numerous WPT difficulties, are also discussed. Different trades are investigated, including cyber security economic consequences, health and safety, foreign object identification, and the effect and influence on the distribution grid. This article also highlights the opportunities and challenges associated with wireless charging systems. We anticipate that our effort will contribute to the advancement of WPT system research and development.

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Introduction to Wireless Power Transfer

Zhang

2017

Springer Theses

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Dual-purpose non-overlapped coil sets as foreign object and vehicle location detections for wireless stationary EV chargers

Cited by 30 publications

References 20 publications

Foreign Object Detection for Electric Vehicle Wireless Charging

Foreign Object Detection for Electric Vehicle Wireless Charging

A critical review on inductive wireless power transfer charging system in electric vehicle

Introduction to Wireless Power Transfer

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