Core design for better misalignment tolerance and higher range of wireless charging for HEV

Mohammad, Mostak; Kwak, Sangshin; Choi, Seundeog

doi:10.1109/apec.2016.7468104

Cited by 21 publications

(14 citation statements)

References 11 publications

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“…For the FDK 6H40 ferrite core used for this research, the values of the constants are = 2.0312, α = 1.418, and β = 2.755 [26]. f ( ) is the resonant frequency and ( ) is the maximum magnetic…”

Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

“…An optimal design must aim to reduce either the current or the total A.C. resistance of the coil or both. Likewise, the power loss (W) in the ferrite core can be expressed as [26]:…”

Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

“…where C m , α and β are constants which are dependent on the grade and properties of the core used. For the FDK 6H40 ferrite core used for this research, the values of the constants are C m = 2.0312, α = 1.418, and β = 2.755 [26]. f (Hz) is the resonant frequency and Bmax(T) is the maximum magnetic flux density in the core.…”

Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

“…In the traditional flux-pipe model topology as well as other resonant coil topologies, aluminum metal sheet is usually used for the shielding of electromagnetic flux [4,11,26]. On this aspect, there was a need to proffer another alternative to aluminum as a shield based on Equation 3.…”

Section: Selection Of Shielding Materialsmentioning

confidence: 99%

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Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

2019

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This paper presents the optimal modeling and finite element analysis of strong-coupled, high-power and low-loss flux-pipe resonant coils for bidirectional wireless power transfer (WPT), applicable to electric vehicles (EVs) using series-series compensation topology. The initial design involves the modeling of strong-coupled flux-pipe coils with a fixed number of wire-turns. The ohmic and core loss reduction for the optimized coil model was implemented by creating two separate coils that are electrically parallel but magnetically coupled in order to achieve maximum flux linkage between the secondary and primary coils. Reduction in the magnitude of eddy current losses was realized by design modification of the ferrite core geometry and optimized selection of shielding material. The ferrite core geometry was modified to create a C-shape that enabled the boosting and linkage of useful magnetic flux. In addition, an alternative copper shielding methodology was selected with the advantage of having fewer eddy current power losses per unit mass when compared with aluminum of the same physical dimension. From the simulation results obtained, the proposed flux-pipe model offers higher coil-to-coil efficiency and a significant increase in power level when compared with equivalent circular, rectangular and traditional flux-pipe models over a range of load resistance. The proposed model design is capable of transferring over 11 kW of power across an airgap of 200 mm with a coil-to-coil efficiency of over 99% at a load resistance of 60 Ω.

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Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

“…An optimal design must aim to reduce either the current or the total A.C. resistance of the coil or both. Likewise, the power loss (W) in the ferrite core can be expressed as [26]:…”

Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

Section: Parameter and Design Optimization Of Flux-pipe Resonant Coilmentioning

confidence: 99%

Section: Selection Of Shielding Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

2019

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“…1(b). C core can be ignored compared with C 2 [23]. M 12 is the mutual inductance between L 1 and L 2 + L core .…”

Section: Equivalent Circuit Model For Mrc-wptmentioning

confidence: 99%

Study of Load Characteristics in Wireless Power Transfer System With Ferrite Core

Wang¹,

Feng²,

Shen³

et al. 2018

PIER M

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For wireless power transfer via magnetic resonant coupling (MRC-WPT), magnetic coupling between resonant coils can be greatly enhanced when a ferrite core is introduced inside the coils. Based on the equivalent circuit model of wireless power transfer system, transfer characteristics of the MRC-WPT system with air resonant coils and with a ferrite core are respectively analyzed in this paper. The influence mechanism of the load on the power transfer efficiency is investigated. Also, the requirement of load for improving transfer efficiency is derived when adding the ferrite core to the system. The numerical simulation and experiment result indicate that the transmission efficiency in the MRC-WPT system with ferrite core is higher than that in the counterpart with air resonant coils in the whole transfer region when the load is larger than the maximal critical load. In addition, for different transfer distances, the system efficiency for the system using the ferrite core tends to become lower than that in the air coil system when the load is smaller than the critical load.

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A critical review on inductive wireless power transfer charging system in electric vehicle

Geetha

Usha

2022

Energy Storage

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Considering a prospect where a driverless electric vehicle (EV) requires an automatic charging system that does not need a person to do anything. In this case, there is a need for a fully automated, fast, safe, cost‐effective, and reliable charging infrastructure that can be used for EVs and other EVs. This infrastructure must also be profitable and allow for quick adoption in electric transportation systems. Wireless charging methods may allow you to understand these characteristics. Wireless power transfer (WPT) is a future technology that offers flexibility, convenience, safety, and the capacity to be automated. Due to its high efficiency and ease of maintenance, resonant inductive wireless charging should get more attention in WPT techniques than other WPT methods. This literature provides an overview of the status of Resonant Inductive Wireless Power Transfer Charging technology, as well as a look at the current and prospects of the wireless EV industry. First, the article provides a brief history of wireless charging technologies, outlining the benefits and drawbacks. Then, the research assists in a comparative analysis of various types of WPT methodologies, control strategies, and compensation networks that have been done so far. The static and dynamic charging procedures, as well as their features, are shown. To increase charging power, a novel approach to the usage of superconducting materials in coil designs is examined, and their potential influence on wireless charging is highlighted. The detailed role and importance of power electronics, as well as the many types of converters utilized in diverse applications, are highlighted. The batteries and their management systems, as well as numerous WPT difficulties, are also discussed. Different trades are investigated, including cyber security economic consequences, health and safety, foreign object identification, and the effect and influence on the distribution grid. This article also highlights the opportunities and challenges associated with wireless charging systems. We anticipate that our effort will contribute to the advancement of WPT system research and development.

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Core design for better misalignment tolerance and higher range of wireless charging for HEV

Cited by 21 publications

References 11 publications

Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

Study of Load Characteristics in Wireless Power Transfer System With Ferrite Core

A critical review on inductive wireless power transfer charging system in electric vehicle

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