Optimization of magnetic core structure based on DD coils for electric vehicle wireless charging

Ni, Xin; Long, Rang; Zhang, Liyan; Chen, Qihong

doi:10.1109/icarcv50220.2020.9305385

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…The quasi-double D coil structure has two pairs of coils which are stretched on the spatial scale. This structure is inspired by DD coils which are closely placed on a plane [18,19]. The planar spiral coil structure is adopted by the Tx coils for its advantage of relatively smooth magnetic field distribution.…”

Section: Coil Structurementioning

confidence: 99%

“…In [19] and [20], mutual inductances between Tx coils are eliminated by using orthogonal coils. To achieve this goal, Tx coil pairs ought to be geometrically symmetrical.…”

Section: Coil Structurementioning

confidence: 99%

“…The proposed quasi-double D coil structure has four significant advantages: FIGURE 2 Four typical coil types of (a) relay coils [19], (b) multi-transmitter coils [9], (c) cubic coil [10], (d) orthogonal coils [12]. 1.…”

Section: Coil Structurementioning

confidence: 99%

“…Current control strategies focus on the frequency, phase and amplitude of the primary side excitation currents in Tx coils [19]. Amplitude modulation control utilizes excitation currents with equal frequency and phase, the magnetic flux density can directionally pass through the centre of the Rx coil.…”

Section: Magnetic Field Control: Current "Vectorization"mentioning

confidence: 99%

“…Four typical coil types of (a) relay coils [19], (b) multi‐transmitter coils [9], (c) cubic coil [10], (d) orthogonal coils [12]. …”

Section: Introductionmentioning

confidence: 99%

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Analysis and design of a novel cubic WPT system in a metal environment for an enclosed sensor scenario

Liang

Yuan

Zhang

et al. 2023

IET Power Electronics

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This paper proposes a novel cubic WPT system for an enclosed sensor scenario, and its transmission characteristics in a metal environment have been analyzed. In addition, stable and high transmission efficiency can be normally achieved in all positions. The proposed quasi‐double D coil structure is composed of two pairs of transmitting coils; each transmitting coil pair is placed face to face and connected serially. Through current amplitude modulation, magnetic flux can flow towards the centre of the receiving coil and keep the system high efficiency when the rotation angle of the receiving coil changes. However, the installation position of the receiving coil is not fixed in the switch cabinet application, and an irregular iron wall and the metal shell of sensors could also lead to inconsistent iron loss of multiple transmitters. To overcome the resulting disturbances in efficiency, the improved current amplitude control method and the optimal load have been theoretically deduced in the case of the position variation of the receiving coil in a metal environment. Finally, experimental results in two‐dimensional space verify the omnidirectional transmission capability of the proposed quasi‐double D coil, and efficiency disturbances are effectively alleviated.

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Section: Coil Structurementioning

confidence: 99%

“…In [19] and [20], mutual inductances between Tx coils are eliminated by using orthogonal coils. To achieve this goal, Tx coil pairs ought to be geometrically symmetrical.…”

Section: Coil Structurementioning

confidence: 99%

Section: Coil Structurementioning

confidence: 99%

Section: Magnetic Field Control: Current "Vectorization"mentioning

confidence: 99%

“…Four typical coil types of (a) relay coils [19], (b) multi‐transmitter coils [9], (c) cubic coil [10], (d) orthogonal coils [12]. …”

Section: Introductionmentioning

confidence: 99%

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Analysis and design of a novel cubic WPT system in a metal environment for an enclosed sensor scenario

Liang

Yuan

Zhang

et al. 2023

IET Power Electronics

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Design and Performance Analysis of New Coupling Magnetic Core Structure for Dynamic Wireless Charging System of Electric Vehicle

Yin,

Zhou,

2023

Energy Tech

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Aiming at the problems of high cost, low efficiency, low power, and high electromagnetic radiation in the dynamic wireless charging system for electric vehicles (EVs), the cover‐like coupling structure and the return‐like coupling structure are designed, and the unique concave structure has excellent engineering practicability. Using Ansoft software for simulation and analysis, the newly proposed two coupling structures have significantly improved the induced voltage and electromagnetic induction strength at the pickup end compared with other commonly used coupling core structures. According to the advantages of practical applications, the application of its composite core structure for simulation and analysis proves that the cover‐like structure of the magnetic field strength at the pickup end not only enhances the magnetic field strength on the coil but also has a good magnetic field shielding effect. The lateral displacement of the EV is kept within the range of 10 cm, the coupling distance is 0–5 cm, the charging is stable, and the transmission efficiency is high. Finally, a dynamic wireless charging experimental platform for small EVs is constructed, which verifies that the new coupling core structure can significantly improve the transmission power and efficiency of the charging system and significantly reduce the economic cost.

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Loss Analysis of Magnetic Core and Its Structure Optimization of Magnetic Coupling Structure in Wireless Power Transfer System

Lan

Feng

Deng

et al. 2023

Lecture Notes in Electrical Engineering

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Optimization of magnetic core structure based on DD coils for electric vehicle wireless charging

Cited by 4 publications

References 10 publications

Analysis and design of a novel cubic WPT system in a metal environment for an enclosed sensor scenario

Analysis and design of a novel cubic WPT system in a metal environment for an enclosed sensor scenario

Design and Performance Analysis of New Coupling Magnetic Core Structure for Dynamic Wireless Charging System of Electric Vehicle

Loss Analysis of Magnetic Core and Its Structure Optimization of Magnetic Coupling Structure in Wireless Power Transfer System

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