Hexagonal Geometry Coil for a WPT High-Power Fast Charging Application

Castillo-Zamora, Ibsan; Huynh, Phuoc Snag; Vincent, Deepa; Pérez-Pinal, Francisco J.; Rodriguez-Licea, Martin A.; Williamson, Sheldon S.

doi:10.1109/tte.2019.2941636

Cited by 31 publications

(12 citation statements)

References 34 publications

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“…The coupling coefficient is 0.012 and the calculated accordant transmission efficiency is only 31.8%. Therefore, the transmitter matrix is designed with single-layer adjacent circular coils rather than overlapped [21,[23][24] or polygonal coils [25][26][27] to limit the coil number and reduce the system complexity. On one hand, compared to polygonal coils, circular coils can avoid the extra AC losses that may occur at the vertex positions.…”

Section: ( )mentioning

confidence: 99%

Design and Analysis of Demand-Customized Selective Wireless Power Transfer System

Tian

Chau

Hua

et al. 2022

IEEE Trans. Ind. Electron.

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A demand-customized selective wireless power transfer (WPT) system is proposed in this paper. Multiple receivers can be recognized based on their positions and the magnetic field in the powering area can be controlled and regulated accordingly. For authorized receivers, the system can simultaneously deliver power to satisfy different output requirements for different electrical appliances, while for unauthorized ones, they can be shut down independently for energy security, even when they are also in the powering area. Compared to the traditional calculation models for multi-input multi-output (MIMO) systems, the proposed current control algorithm uses a piecewise optimization procedure to simplify the iteration and improve control flexibility. Hybrid-frequency pacing (HFP) is adopted as the control strategy to further reduce the output fluctuation and raise the system efficiency. An experimental prototype with a 3 × 3 transmitter matrix is established. The system can successfully power two receivers with the same sizes for four different power requirement scenarios, which validates the selectivity and the controllability of the proposed system.

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Section: ( )mentioning

confidence: 99%

Design and Analysis of Demand-Customized Selective Wireless Power Transfer System

Tian

Chau

Hua

et al. 2022

IEEE Trans. Ind. Electron.

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“…The flexible design reduces misalignment tolerance when acting as secondary [139]. An increase in the study of coil structures has introduced many structures such as hexagonal pads, octagonal pads, multi-thread coils, H-shaped solenoid coils and Taichi coils [147], [148]. The use of High-Temperature Superconducting (HTS) coils instead of the conventional copper coils has shown improved efficiency of 95% and power transfer capability for a four-coil system because of its little AC resistance and high-quality factor.…”

Section: Coil Design Considerationsmentioning

confidence: 99%

A Review on UAV Wireless Charging: Fundamentals, Applications, Charging Techniques and Standards

2021

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Unmanned Aerial Vehicles (UAVs) are becoming increasingly popular for applications such as inspections, delivery, agriculture, surveillance, and many more. It is estimated that, by 2040, UAVs/drones will become a mainstream delivery channel to satisfy the growing demand for parcel delivery. Though the UAVs are gaining interest in civil applications, the future of UAV charging is facing a set of vital concerns and open research challenges. Considering the case of parcel delivery, handling countless drones and their charging will become complex and laborious. The need for non-contact based multi-device charging techniques will be crucial in saving time and human resources. To efficiently address this issue, Wireless Power Transmission (WPT) for UAVs is a promising technology for multi-drone charging and autonomous handling of multiple devices. In the literature of the past five years, limited surveys were conducted for wireless UAV charging. Moreover, vital problems such as coil weight constraints, comparison between existing charging techniques, shielding methods and many other key issues are not addressed. This motivates the author in conducting this review for addressing the crucial aspects of wireless UAV charging. Furthermore, this review provides a comprehensive comparative study on wireless charging's technical aspects conducted by prominent research laboratories, universities, and industries. The paper also discusses UAVs' history, UAVs structure, categories of UAVs, mathematical formulation of coil and WPT standards for safer operation.

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“…The most popular shape of a planar-type transmitter is a spiral coil wound in a circle at equal intervals, called the Archimedean spiral coil [9,10]. Other shapes include a rectangular spiral coil [11,12], pentagonal spiral coil [13], hexagonal spiral coil [14], helical coil [15,16], solenoid coil [17], and conical coil [18]. As a transmitter having a uniform magnetic field distribution, a circular spiral coil [19,20] and square spiral coil [21,22] having non-uniform wire widths and intervals have been presented.…”

Section: Introductionmentioning

confidence: 99%

A bernoulli spiral coil transmitter for charging various small electronic devices

Kudo

Hachiya

Kanamoto

et al. 2022

IEICE Electron. Express

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Wireless charging technology is built into a variety of devices. However, each of these products use a dedicated wireless charger, so when it comes to making better organizational use of space, being able to charge various devices with one transmitter is desirable. In this letter, we propose a Bernoulli spiral coil transmitter that can efficiently charge smart devices of various sizes. Our analysis shows that the proposed transmitter can maintain a certain coupling coefficient even when the diameter of the receiver coil is small, compared with the conventional Archimedean spiral coil transmitter. In other words, even if the diameter is small, the output power and power transfer efficiency of the proposed transmitter are higher than those of the conventional transmitter.

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Hexagonal Geometry Coil for a WPT High-Power Fast Charging Application

Cited by 31 publications

References 34 publications

Design and Analysis of Demand-Customized Selective Wireless Power Transfer System

Design and Analysis of Demand-Customized Selective Wireless Power Transfer System

A Review on UAV Wireless Charging: Fundamentals, Applications, Charging Techniques and Standards

A bernoulli spiral coil transmitter for charging various small electronic devices

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