An Integrated Printed-Circuit-Board Resonator Design for Inductive Power Transfer System

Qu, Jialong; Kiratipongvoot, Sitthisak; Lee, Chi-Kwan; Tang, Niang

doi:10.1109/ecce.2018.8558378

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…Special care is needed to reduce the stray capacitance in a multi-layer spiral coil to increase the useable bandwidth for inductor/transformer windings [104]. However, this characteristic can be utilized to form a natural resonator where discrete capacitors cannot be installed due to high electric fields [105]. The operational characteristic of such winding design is discussed in [106], where both proximity effect and inter-layer displacement current (leakage) takes place at the same time, as shown in Fig.…”

Section: Considerations For Mega-hertz Resonator Constructionmentioning

confidence: 99%

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Wireless Power Transfer: A Paradigm Shift for the Next Generation

Hui

Yang

Zhang

2023

IEEE J. Emerg. Sel. Topics Power Electron.

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The first generation of wireless power transfer (WPT) standard Qi, launched in 2010, contains a wide range of transmitter and receiver designs with the aim of maximizing compatibility to attract many manufacturers to share the same standard. Such compatibility feature (i.e., interoperability) has not only attracted over 400 company members in the Wireless Power Consortium (WPC), but also facilitated a fast-growing wireless power market for a decade. The WPC is now expanding the scope of WPT applications to mid-power and high-power applications up to several kilowatts while the Society for Automobile Engineers also set the SAE standard for wireless charging of electric vehicles (EVs) up to tens of kilowatts. Without compromising compatibility, the authors share in this paper their views on the need for a paradigm shift from compatibility to optimal performance in terms of maximum energy efficiency for the entire charging process and minimum charging time. This paradigm change is imminent and important in view of the increasing power of WPT applications. Several enabling technologies essential to the paradigm shift will be addressed.

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Section: Considerations For Mega-hertz Resonator Constructionmentioning

confidence: 99%

“…[ [102][103][104][105][106] VII. CONCLUSION With the increasing power level and range of WPT applications, there is a need for paradigm shift to optimal performance to achieve high system efficiency and minimum charging time for entire charging process of the battery loads without compromising interoperability.…”

Section: Scenariomentioning

confidence: 99%

Wireless Power Transfer: A Paradigm Shift for the Next Generation

Hui

Yang

Zhang

2023

IEEE J. Emerg. Sel. Topics Power Electron.

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“…The PCB winding structures are particularly important for domino WPT systems in the high-voltage (HV) insulation rod applications in HV transmission towers [19]. Power companies have confirmed that manual windings and discrete capacitors are not suitable for such HV applications because of the HV discharge between metallic terminals in discrete capacitors [20]. PCB resonator structures have distributed inductance and capacitance and can therefore avoid internal HV discharge [19].…”

Section: Introductionmentioning

confidence: 99%

“…For domino WPT applications, reference [19] reports a PCB resonator winding design optimized by the partial-element equivalent-circuit (PEEC) method. However, the PCB resonator structures in [19] and [20], when manufactured to the size for embedment inside standard insulation discs of commercial insulation rods, have limitations on operating frequency range and relatively low quality (Q) factor and energy efficiency due to the dimensions of the PCB. In addition, these structures are restricted to parallel resonant configurations.…”

Section: Introductionmentioning

confidence: 99%

“…Taking advantages of the low dielectric constant of air, the new resonator structure uses the airgap to separate the two printed planar windings of the resonator. Compared with conventional designs [19], [20], the new PCB resonator design has the following advantages: 1) replacing the PCB material (with a typical dielectric constant of 4.2 and loss tangent of 0.03) with an airgap (with a dielectric constant of 1.0 and virtually zero loss tangent), therefore greatly reducing the inter-capacitance and its associated dielectric power loss of the resonator, 2) the flexibility of being configurated as either series or parallel resonators, 3) have much high resonant frequency due to the reduction of inter-capacitance in 1), 4) have much higher Q factor due to the reduction of ac winding resistance, 5) have significant improvement in transmission efficiency. Section II describes the structural differences among the conventional PCB resonator design and two proposed PCB resonator designs.…”

Section: Introductionmentioning

confidence: 99%

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New Printed-Circuit-Board Resonators With High Quality Factor and Transmission Efficiency for Mega-Hertz Wireless Power Transfer Applications

Yücel

et al. 2023

IEEE Trans. Power Electron.

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Abstract-This paper presents a new printed-circuit-board (PCB) resonator structure suitable for mega-Hertz wireless power transfer (WPT) applications. Unlike previous PCB resonators that can form only parallel resonant structures, the new designs can easily be configurated as either parallel or series resonators. The novelty of the resonator structure involves the replacement of the PCB material with an airgap in the main magnetic flux path of the resonator structure and adoption of air-trenches between adjacent turns, therefore greatly reducing the inter-and intra-capacitance of the two printed windings and its associated PCB dielectric power loss. The natural resonant frequency can easily be tuned for mega-Hertz operation. A comparative study is conducted between conventional and new designs. The quality factor, resonant frequency, transmission efficiency and ac resistance of the new designs are significantly improved by over 435%, 236%, 137% and 41%, respectively over those of the conventional designs. An accurate distributed-circuit model of the new PCB resonator structures is also included and used in domino WPT system simulation. PCB resonators of the conventional and new designs are constructed to form domino WPT systems for practical evaluation. Both simulation and practical results are included to confirm the accuracy of the PCB resonator model and the advantages of the new resonator structure.

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