Rigorous network modeling of magnetic-resonant wireless power transfer

Costanzo, Alessandra; Dionigi, Marco; Mastri, Franco; Mongiardo, M.; Russer, Johannes A.; Russer, P.

doi:10.1017/wpt.2014.4

Cited by 18 publications

(19 citation statements)

References 22 publications

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“…For conjugate matching the value of is given in (38). When as given by (21) is added, the condition (19) is realized, and, from (17), we have the following expression for the normalized input power: (22) and for the power on the load (23) When (23) reduces to the following expression: (24) which, asymptotically, for , gives a behavior of the type , as shown in Fig. 4.…”

Section: B Maximum Efficiency Solutionmentioning

confidence: 99%

Rigorous Network and Full-Wave Electromagnetic Modeling of Wireless Power Transfer Links

Dionigi

Mongiardo

Perfetti

2015

IEEE Trans. Microwave Theory Techn.

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The proposed approach makes use of full-wave electromagnetic modeling of wireless power transfer links in order to derive the network characterization, e.g., in terms of scattering or impedance matrix. Once the latter is obtained, we show that network theory provides the appropriate matching impedances for achieving either maximum efficiency, maximum power on the load, or conjugate matching. The proposed approach also permits to derive closed-form matching networks and expressions for power and efficiency. An example of full-wave numerical electromagnetic modeling of a wireless power transfer link is presented. The selected example, which is similar to the experiment published by Kurs et al., shows the importance of selecting the appropriate source/load impedance for obtaining significative results.

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Section: B Maximum Efficiency Solutionmentioning

confidence: 99%

Rigorous Network and Full-Wave Electromagnetic Modeling of Wireless Power Transfer Links

Dionigi

Mongiardo

Perfetti

2015

IEEE Trans. Microwave Theory Techn.

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“…We implemented the ideally required 1:n transformer by using immittance inverters. We derived series and parallel matching topologies for maximum wireless power transfer [53].…”

Section: A Simultaneous Wireless Power Transfer and Near-field Commumentioning

confidence: 99%

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

Team¹

2017

IEEE Microwave

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“…Our work involves such loosely coupled WPT (LCWPT) where we employ a large primary coil to transmit power to a much smaller secondary coil (implant) that is in motion. To compensate for loose coupling, the use of resonant circuit systems is employed to create boosted voltage/current levels at the secondary coil, even in the presence of low coupling coefficients [2,4].…”

Section: Introductionmentioning

confidence: 99%

Design of a wireless measurement system for use in wireless power transfer applications for implants

et al. 2017

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The performance of wireless power transfer (WPT) systems is a function of many parameters such as resonance matching, coil quality factor, system impedance match, and others. When designing and testing WPT systems, reliable measurement of system performance is essential. In our application, we use WPT to power biomedical implants for telemetry acquisition from small rodents, where rodent behavior data is used to study disease models. Such an application employs a large primary coil and a much smaller moving secondary coil, which can be defined as a loosely coupled WPT (LCWPT) system. This paper presents a novel wireless measurement system (WMS) that is used to collect real-time performance data from the secondary circuit (implant), while testing LCWPT systems. Presently, measuring the performance of the secondary side of LCWPT systems while they are in operation can be problematic. The literature reports various measurement errors when using voltage/current probes, or coaxial cables placed directly into the primary magnetic field. We have designed the WMS to greatly reduce such measurement errors, where the WMS measures the induced voltage (and hence received power) and relays this information by radio. Experiments were done to test the WMS, as well as comparison with cable-based measurements.

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Rigorous network modeling of magnetic-resonant wireless power transfer

Cited by 18 publications

References 22 publications

Rigorous Network and Full-Wave Electromagnetic Modeling of Wireless Power Transfer Links

Rigorous Network and Full-Wave Electromagnetic Modeling of Wireless Power Transfer Links

Europe and the Future for WPT : European Contributions to Wireless Power Transfer Technology

Design of a wireless measurement system for use in wireless power transfer applications for implants

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