Improving the Misalignment Tolerance of Wireless Charging System by Optimizing the Compensate Capacitor

Zhu, Qingwei; Guo, Yanjie; Wang, Lifang; Liao, Chenglin; Fang, Li

doi:10.1109/tie.2015.2397882

Cited by 89 publications

(33 citation statements)

References 6 publications

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“…In the literature, a coil system is generally classified as either a four-coil or a two-coil system. A four-coil system [15][16][17] offers the advantage of two degrees of freedom that the source coil can be mounted and coupled with the sending coil to adjust the system input impedance, and the load coil can be mounted and coupled with the receiving coil to adjust the equivalent load resistance seen from the receiving coil to match the load condition. A four-coil system is suitable for mid-range applications while a two-coil system gives better performance in short-range applications [18].…”

Section: Coil Designmentioning

confidence: 99%

A review of wireless power transfer for electric vehicles: Prospects to enhance sustainable mobility

et al. 2016

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Wireless power transfer (WPT), which transmits power by an electromagnetic field across an intervening space, provides the prospect of new opportunities for electric vehicles (EVs) to enhance sustainable mobility. This review article evaluates WPT technology for EV applications from both technical and sustainability perspectives. The objectives of this review include: (1) to present the state-of-the-art technical progress and research bottlenecks in WPT development and applications in the transportation sector; (2) to characterize the demonstrations of the real-world deployment of WPT EV systems; and (3) to evaluate the sustainable performance and identify challenges and opportunities for improvement. From the technical perspective, progress on coil design, compensation topologies, and power electronics converters and control methods are reviewed with a focus on system performance. From the sustainability perspective, performance is defined in terms of energy, environmental, and economic metrics, and policy drivers and issues of health and safety are also examined.

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Section: Coil Designmentioning

confidence: 99%

A review of wireless power transfer for electric vehicles: Prospects to enhance sustainable mobility

et al. 2016

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“…At 100% misalignment offset, the efficiency of the IPT system drops drastically. With proposed coil design, the misalignment tolerance is extended to 50% of the coil size and can be considered as a significant improvement [33,34]. There has been work on different designs of coils for the IPT system in which magnetic coupling is sensitive to the position of coils with respect to each other [35,36].…”

Section: Misalignment Tolerance Analysismentioning

confidence: 99%

Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging

et al. 2016

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Abstract:The inductive power transfer (IPT) system for electric vehicle (EV) charging has acquired more research interest in its different facets. However, the misalignment tolerance between the charging coil (installed in the ground) and pick-up coil (mounted on the car chassis), has been a challenge and fundamental interest in the future market of EVs. This paper proposes a new coil design QDQ (Quad D Quadrature) that maintains the high coupling coefficient and efficient power transfer during reasonable misalignment. The QDQ design makes the use of four adjacent circular coils and one square coil, for both charging and pick-up side, to capture the maximum flux at any position. The coil design has been modeled in JMAG software for calculation of inductive parameters using the finite element method (FEM), and its hardware has been tested experimentally at various misaligned positions. The QDQ coils are shown to be capable of achieving good coupling coefficient and high efficiency of the system until the misalignment displacement reaches 50% of the employed coil size.

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“…Optimization of the dimensions of circular coils for high efficiency and tolerance to misalignments is addressed in [56]. Three coil and four coil structures are also less sensitive to gap variation and misalignments [57][58][59].…”

Section: Design Of the Coil Systemmentioning

confidence: 99%

Review on Contactless Power Transfer for Electric Vehicle Charging

Ravikiran

Keshri

2017

Energies

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Abstract:For the past few years the feasibility of contactless power transfer (CPT) is being explored extensively as a future solution for charging electric vehicles (EVs). Studies report that the main obstacles in CPT are low power efficiency, misalignment tolerance, cost, range and charging time anxiety. This paper presents a review based on existing literature of the CPT systems for EV charging. Different cases of CPT technologies, their principle of operation and equivalent circuit based analysis is carried out. A discussion on compensation strategies and their effectiveness are reviewed and discussed. The design of coil systems for some city electric cars has been referenced in general. At the end recommendations and conclusions are made based on the study and analysis of the information available in literature.

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Improving the Misalignment Tolerance of Wireless Charging System by Optimizing the Compensate Capacitor

Cited by 89 publications

References 6 publications

A review of wireless power transfer for electric vehicles: Prospects to enhance sustainable mobility

A review of wireless power transfer for electric vehicles: Prospects to enhance sustainable mobility

Coil Design for High Misalignment Tolerant Inductive Power Transfer System for EV Charging

Review on Contactless Power Transfer for Electric Vehicle Charging

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