Coreless Transmitting Coils With Conductive Magnetic Shield for Wide-Range Ubiquitous IPT

Choi, Byeong G.; Sohn, Yeong-Hoon; Lee, Eun S.; Han, Seung Ho; Kim, Hoi R.; Rim, Chun T.

doi:10.1109/tpel.2018.2839107

Cited by 34 publications

(7 citation statements)

References 39 publications

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“…In [41], it has presented an overview of related EMF shielding and reduction methods for different application occasions, especially a passive shielding methodology. For a passive shielding means, the ferrite and Aluminium plate are commonly used in WPT system as the shielding materials [42][43][44][45][46]. Beyond that, the active shielding methods, such as changing the circuit topology [47,48] and adding the conductor current loop [49], also have been proposed.…”

Section: Pte = 𝛼mentioning

confidence: 99%

A critical review of metamaterial in wireless power transfer system

Chen

Zeng

et al. 2021

IET Power Electronics

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Wireless power transfer (WPT) is a promising charging method without physical contact for the electronic products energy supply. However, low transfer efficiency, short transmission distance, as well as the electromagnetic (EM) leakage are commonly main bottlenecks of the WPT technology in the practical applications. The electromagnetic metamaterials (EMMMs) used in WPT system have opened up a brand-new approach for better transfer properties and EM shielding. This paper is intended to provide an overview of the current studies and breakthroughs of the WPT system based on EMMMs. First, we demonstrate the fundamentals of the WPT based on the magnetic resonant coupling. Then, various key considerations of the EMMMs, such as working mechanisms, fabrications have been taken into accounted in detail. Moreover, the applications of EMMM in WPT systems are elaborated. Finally, the technical challenges in connection with working frequency and design miniaturization are investigated in this paper. This novel interdisciplinary technology shows important meanings on the extensive application of energy transmission in the future.

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Section: Pte = 𝛼mentioning

confidence: 99%

A critical review of metamaterial in wireless power transfer system

Chen

Zeng

et al. 2021

IET Power Electronics

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“…U AB and U ab are the voltages of the transmitting-and receiving-side compensation circuits, and R eq is the equivalent load resistance before the rectifier. The voltage and current of the compensation network are under the continuous conduction mode (CCM) operation in the steady state, only considering the fundamental frequency components [23]. They can be expressed as follows [24]:…”

Section: Ipt System For Uavsmentioning

confidence: 99%

Magnetic Coupler Optimization for Inductive Power Transfer System of Unmanned Aerial Vehicles

Stegen

2021

Energies

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Unmanned aerial vehicles (UAVs) have been widely used in military and civilian applications. However, the insufficient cruising range restricts the development of UAVs due to the limitation of their battery. Inductive power transfer (IPT) is an effective way to charge the battery and solve this problem. Magnetic coupler is a key component of the IPT system, which greatly affects the power transfer and efficiency of the IPT. This paper proposes a new magnetic coupler with vertical spiral coils and ferrite PQI cores for the IPT system of UAVs, which can enhance the magnetic coupling and improve the performance of the IPT system. Finite element simulations are used to investigate the magnetic field distribution and coupling capability of the proposed magnetic coupler. In addition, an experimental platform is built to prove the validity of the IPT system using the proposed magnetic coupler. The results show that the coupling coefficient can reach 0.98, and the system transfer efficiency is 89.27% with an output power of 93 W. The IPT system also has a perfect misalignment tolerance and can achieve a stable output power.

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“…An IPT system can deliver power over relatively large air gaps via magnetic couplings, including a high-frequency inverter, compensation topology, coupling coils, and charging circuits. An IPT system has the excellent advantages of safety with galvanic isolation [1], high reliability [2], and being environmentally friendly [3] compared with traditional conductive charging technology. Nowadays, the IPT system has been widely employed in powering electronic applications, such as low-power portable electronic devices, implantable medical instruments [4], electric vehicle (EV) charging [5], and autonomous underwater power supplies [6].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Inductive Power Transfer System with High Misalignment Tolerance Using Double-DD Quadrature Pads

Gong

Tong

et al. 2022

Electronics

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Inductive power transfer (IPT) has been widely adopted as an efficient and convenient charging manner for both static and in-motion EVs. In this paper, a new hybrid topology is presented to improve the coupling tolerance under pad misalignment. The double inductor–capacitor–capacitor (LCC-LCC) network and series hybrid network combining the LCC-LCC topology and series-series (SS) topology are connected in parallel to provide better tolerance against self- and mutual inductance changes, particularly with a large Z-axis transmission distance. A double-DD quadrature pad (DD2Q) consists of a Q pad, and double orthogonal DD pads are analyzed in detail, which are employed to decouple the cross-mutual inductance. Moreover, a parametric design method based on the misalignment characteristics of the DD2Q pads is also proposed to maintain relatively constant power output. A 650-W hybrid topology with a fixed operating frequency of 85 kHz was built to verify the system’s feasibility. The size of the DD2Q pads was 280 mm × 280 mm, and the air gap was 100 mm. The results clearly show that the proposed hybrid topology can achieve a fluctuation within 5% in the output current with load varying from 100% full load to 25% light load conditions when the Z-axis transmission distance varies from 80 mm to 150 mm, and the maximum efficiency can reach 91% when the Z-axis transmission distance is 80 mm.

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Coreless Transmitting Coils With Conductive Magnetic Shield for Wide-Range Ubiquitous IPT

Cited by 34 publications

References 39 publications

A critical review of metamaterial in wireless power transfer system

A critical review of metamaterial in wireless power transfer system

Magnetic Coupler Optimization for Inductive Power Transfer System of Unmanned Aerial Vehicles

A Hybrid Inductive Power Transfer System with High Misalignment Tolerance Using Double-DD Quadrature Pads

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