Symmetric Sensing Coil Design for the Blind-Zone Free Metal Object Detection of a Stationary Wireless Electric Vehicles Charger

Thai, Van X.; Jang, Gi C.; Jeong, Seog Y.; Park, Jun H.; Kim, Yun-Su; Rim, Chun T.

doi:10.1109/tpel.2019.2936249

Cited by 75 publications

(34 citation statements)

References 26 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%

“…The detection coil proposed in [58] consisted of many turns of two parallel symmetrical half-circle coils overlapping with reverse directions. The symmetrical configurations of the square coils connected in reverse direction are proposed in [90][91][92], where a double-layer balanced configuration is used in [90], a two-layer centrosymmetric configuration is used in [91], a single layer symmetrical configuration with a non-symmetrical center to eliminate the blind zones is proposed in [92].…”

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%

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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%

See 2 more Smart Citations

Foreign Object Detection for Electric Vehicle Wireless Charging

Xia

Yuan

et al. 2020

Electronics

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“…On the other hand, the sensitivity could also be increased by shrinking the size of the PCS. Therefore, instead of utilizing one large PSC, multiple smaller PSCs are applied to cover the surface of the Tx pad [7], [9], [11].…”

Section: A Passive Detection Coil Setsmentioning

confidence: 99%

Detection of Metallic Foreign Objects and Electric Vehicles Using Auxiliary Coil Sets for Dynamic Inductive Power Transfer Systems

Shi

Grazian

Dong

et al. 2020

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)

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This paper proposes a new method of electric vehicles detection (EVD) and foreign objects detection (FOD) for dynamic inductive power transfer (DIPT) systems. The proposed detection method applies both passive coil sets (PCSs) and active coil sets (ACSs) to achieve both EVD and FOD with a high detection sensitivity. The operation mechanisms and design of the detection coil sets topology and resonant circuits are elaborated. Finally, both circuit and magnetic field simulation are carried out. The results verify the feasibility and sensitivity of the proposed detection method.

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Characteristic analysis and suppression of SiC MOSFET‐based crosstalk for inductive power transfer systems

Zhang

Guo

et al. 2021

Circuit Theory & Apps

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Due to the lower gate threshold voltage of silicon carbide (SiC) MOSFET as compared with the silicon (Si) MOSFET, crosstalk significantly limits the high‐speed switching performance of SiC MOSFET‐based inductive power transfer (IPT) systems. The paper studies the crosstalk characteristic and proposes a suppression method of crosstalk aiming at IPT systems with phase‐shifted control. Firstly, the generation mechanism of crosstalk is modeled and analyzed. Then, based on the analysis results, the special crosstalk problem for IPT systems with phase‐shifted control is discussed, and a crosstalk suppression method is analyzed based on the optimization of compensation network parameters. Finally, a 1‐kW IPT system prototype is built for experimental verification. The experimental results show that the optimization method can effectively suppress the crosstalk problem of the IPT system with phase‐shifted control and does not significantly affect the output power and transmission efficiency.

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Symmetric Sensing Coil Design for the Blind-Zone Free Metal Object Detection of a Stationary Wireless Electric Vehicles Charger

Cited by 75 publications

References 26 publications

Foreign Object Detection for Electric Vehicle Wireless Charging

Foreign Object Detection for Electric Vehicle Wireless Charging

Detection of Metallic Foreign Objects and Electric Vehicles Using Auxiliary Coil Sets for Dynamic Inductive Power Transfer Systems

Characteristic analysis and suppression of SiC MOSFET‐based crosstalk for inductive power transfer systems

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