Design of High‐Power High‐Efficiency Wireless Charging Coils for EVs with MnZn Ferrite Bricks

Zhu, Yuyu; Wang, Zuming; Cao, Xin; Wu, Li

doi:10.1155/2021/9931144

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Once the requirement of high-power wireless charging is acquired, ferrite bricks can be selected to increase the self-inductance of the coils as well as transmission efficiency. Y. Zhu et al [1] have investigated several effects on wireless transmission in real applications. Both theoretical and simulation have been conducted, and the wireless transmission system has been generated.…”

Section: Wireless Sensor Networkmentioning

confidence: 99%

Sensors, Signal, and Artificial Intelligent Processing

2022

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Section: Wireless Sensor Networkmentioning

confidence: 99%

Sensors, Signal, and Artificial Intelligent Processing

2022

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“…At present, the coupling structure for UAV wireless charging mainly concentrates on the performance of the planar configuration, which adopts primarily face-to-face charging. This brings the problems of poor adaptability to UAV body structure and strong magnetic leakage interference [25]. Compared with the planar structure, the three-dimensional coupling structure reduces the coupling capacity of the two coils to a certain extent.…”

Section: Introductionmentioning

confidence: 99%

Wireless Charging Concave Coil Design for UAVs

Zhu

et al. 2022

Electronics

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This paper proposes an orthogonal concave coupling mechanism based on wireless charging for unmanned aerial vehicles (UAVs); the original edge adopts a concave transmitting coil. So as not to occupy the gimbal position at the receiving end, the receiving coil is installed on the landing gear of the UAV perpendicular to the transmitting coil to form an orthogonal coupling magnetic field. This study conducted a finite element simulation of the coupling mechanism using Ansys Maxwell to test the mechanism’s coupling capability and anti-offset performance. The spatial distribution of the system’s magnetic field was constrained, and the magnetic flux leakage of the system was reduced by optimizing the transmitter structure. The system employed a double-sided LCC compensation topology network and used wireless communication to achieve constant voltage/constant current closed-loop control. Finally, the experimental platform was built, and the results show that the system output power was able to reach 960 W with 85.7% efficiency, and could realize the closed-loop control of charging with 48 V constant voltage and 20 A constant current. The system has the advantages of being small in size, lightweight (290 g) and easy to install, and the receiver device has strong resistance to offset.

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“…Ferrite materials are chosen due to their high permeability, low losses, and low cost. In a study [20], the authors proposed a new ferrite magnetic coupler design that utilized a multi-layer structure to improve power transfer efficiency. The results showed that the proposed design outperformed conventional ferrite magnetic couplers regarding power transfer efficiency and voltage regulation.…”

mentioning

confidence: 99%

“…The results showed that the proposed design outperformed conventional ferrite magnetic couplers regarding power transfer efficiency and voltage regulation. Another study [20] investigated the effects of ferrite magnetic coupler geometry on the performance of WPT systems. The authors compared the performance of rectangular and circular ferrite magnetic couplers and found that the circular design offered a higher coupling coefficient and lower losses.…”

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confidence: 99%

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Ferrite shielding thickness and its effect on electromagnetic parameters in wireless power transfer for electric vehicles (EVs)

Yadav,

Bera

2023

J. Eng. Appl. Sci.

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Wireless power transfer (WPT) has become an increasingly popular technology for charging electronic devices wirelessly. One of the key challenges in WPT is increasing efficiency and reducing different losses in coils caused by the higher air gap and coil coupling between the primary and secondary coils. Ferrite shielding is a common technique used to reduce losses and increase the coupling in WPT systems. In this paper, we present an analysis and comparison study of the effect of ferrite shielding thickness ($$F_T$$ F T ) on the electromagnetic parameters of WPT systems. We investigate the impact of varying the ferrite shielding thickness on parameters such as power transfer efficiency, coupling coefficient (k), and magnetic field strength (B). Our results show that increasing the ferrite shielding thickness can significantly reduce losses and improve the performance of WPT systems. Also, analyze the trade-off between ferrite shielding thickness and power transfer efficiency and provide guidelines for selecting an optimal thickness for a given application. This study provides valuable insights into the design and optimization with weight vs. coupling comparison for WPT systems using ferrite shielding. It can help inform the development of future WPT technologies. The result obtained through simulation, i.e., coil-to-coil efficiency, is 98.88 to 99.7360% at 6.78MHz frequency for a 5-mm- to 50-mm-thick ferrite rectangular coupler using ANSYS Maxwell and ANSYS simplorer software.

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Design of High‐Power High‐Efficiency Wireless Charging Coils for EVs with MnZn Ferrite Bricks

Cited by 4 publications

References 25 publications

Sensors, Signal, and Artificial Intelligent Processing

Sensors, Signal, and Artificial Intelligent Processing

Wireless Charging Concave Coil Design for UAVs

Ferrite shielding thickness and its effect on electromagnetic parameters in wireless power transfer for electric vehicles (EVs)

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