Modeling and Analysis of the Bendable Transformer

Ho, Godwin Kwun Yuan; Zhang, Cheng; Pong, M.H.; Hui, S. Y. Ron

doi:10.1109/tpel.2015.2500606

Cited by 22 publications

(5 citation statements)

References 25 publications

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“…On the other hand, closely packing the turns results in more parasitic capacitances [100] that lowers the self-resonant frequency of the winding, and the current through the leakage capacitance reduces the induced magnetic field [101]. The printed circuit board (PCB) coils [102], including the flexible printed circuit (FPC) types [103], are often used in low-power application for the consistency in manufacturing tolerance and inexpensive production cost. 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].…”

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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“…In some other applications, rectangular shaped windings are often used [15], which require a different template. As shown in Figure 4b, the line-type windings can be generated from a series of lines with connections interpolated with lines or curves using the splines in the 3D space [16].…”

Section: Straight Line Type Modelmentioning

confidence: 99%

IPTVisual: Visualisation of the Spatial Energy Flows in Inductive Power Transfer Systems with Arbitrary Winding Shapes

Zhang

Chen

et al. 2022

WEVJ

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Mid-ranged wireless power transfer by induction or inductive power transfer (IPT), including the strong magnetic resonance method, has been widely adopted, in numerous applications where wires are restricted. The energy flow in space, of course, is invisible to engineers. The windings are often required to be irregular shapes to accommodate the industrial designs of the products, thus, a visualisation method for energy transfer paths could greatly help the design and optimization of such systems. A time-efficient methodology, including the model, analysis and plot of the three-dimensional energy flow for IPT systems, is proposed in this paper. Algorithms of fast describing arbitrarily shaped windings are proposed and the time complexities are evaluated. A software tool, IPTVisual, is developed. It takes the inputs of key coordinates of the windings, the assignments of voltage and/or current sources, any compensation capacitors and auxiliary circuits, and the required observation points to generate the 3D models of the windings and the Poynting vectors, rendered in web browsers for the most extendable compatibility. Several example scenarios have been tested and the results match with the expected operations.

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“…First, only copper layers on PCB are modelled. Such application, without magnetic core, can be interesting for contactless energy transfer [36], HF drivers [37], bendable transformer [38] or very high‐frequency transformer for example [39]. Fig.…”

Section: Modelling Of Planar Inductorsmentioning

confidence: 99%

Numerical modelling of PCB planar inductors: impact of 3D modelling on high‐frequency copper loss evaluation

Taylor

Margueron

Menach

et al. 2017

IET Power Electronics

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Loss values are key parameters for designing high performance high frequency (HF) magnetic components for power electronics (PE) converters. With the increase of PE switching frequencies, copper losses have to be precisely quantified, ideally until some megahertz. In the literature, many 2D numerical simulations based on finite element analysis (FEA) are performed for such computations. 3D FEA studies of planar components are still limited because of modeling problems, computational resources and computing time. In this paper, quantitative comparisons between 2D and 3D simulation results for planar inductors are achieved focusing on copper loss computation. Results are compared in terms of simulation performances and accuracy. The aim of the paper is to highlight benefits of 2D and 3D FEA simulations in order to choose the appropriate model according to the studied problem.

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Modeling and Analysis of the Bendable Transformer

Cited by 22 publications

References 25 publications

Wireless Power Transfer: A Paradigm Shift for the Next Generation

Wireless Power Transfer: A Paradigm Shift for the Next Generation

IPTVisual: Visualisation of the Spatial Energy Flows in Inductive Power Transfer Systems with Arbitrary Winding Shapes

Numerical modelling of PCB planar inductors: impact of 3D modelling on high‐frequency copper loss evaluation

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