Active Tuning of Wireless Power Transfer System for compensating coil misalignment and variable load conditions

Murliky, Lucas; Porto, Rodrigo Wolff; Brusamarello, Valner; Sousa, Francinalva Cordeiro de; Triviño-Cabrera, Alicia

doi:10.1016/j.aeue.2020.153166

Cited by 17 publications

(9 citation statements)

References 21 publications

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“…The method of adaptive load resistance can also be used to compensate for spatial changes [14]- [16]. This method is typically implemented by changing the load resistance at the output of the rectifier [17]- [19]. The mapping of load resistance to the rectifier input impedance is nonlinear and can introduce a reactive load to the CPT system, particularly for MHz-wireless power transfer systems.…”

Section: Dc-to-ac Invertermentioning

confidence: 99%

Multiband Adaptive Impedance Compensation Methods for Spatially Robust Capacitive Power Transfer Systems

Ahmadi,

Dadashzadeh,

Markley

et al. 2024

IEEE J. Emerg. Sel. Topics Power Electron.

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This study aims to compare the merits of using both adaptive load resistance and adaptive frequency for impedance compensation in capacitive power transfer (CPT) systems. We present an analysis of an adaptive load and frequency-band-switching compensation method to achieve a spatially robust CPT system. The method complies with spectrum constraints that limit wireless power transfer to the discrete industrial, scientific, and medical (ISM) frequency bands. Coarse impedance control is obtained by switching frequencies and fine impedance control is obtained by changing load resistance. The method is verified experimentally in a dual-band CPT system operating at two octave-spaced ISM bands: 13.56 MHz and 27.12 MHz. The system is comprised of a six-plate CPT link, class-E inverters, and class-E self-synchronous rectifiers. Adaptive load compensation is implemented at the output of the rectifier. Experimental results show that, with frequency and load compensation, load power can be held constant over a spatial gap that ranges from 4.0 cm to 16.0 cm. Results show that the dual band operation extends the spatial bandwidth of the system by 50% compared to a single frequency system operating at 13.56 MHz.

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Section: Dc-to-ac Invertermentioning

confidence: 99%

Multiband Adaptive Impedance Compensation Methods for Spatially Robust Capacitive Power Transfer Systems

Ahmadi,

Dadashzadeh,

Markley

et al. 2024

IEEE J. Emerg. Sel. Topics Power Electron.

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“…An EV wireless charging system is designed such that the maximum operational efficiency is obtained irrespective of the increase or decrease in the load and the coefficient of coupling due to misalignment or variation in the air gap [206]. Maximum efficiency is achieved due to factors which can be categorised in three groups [216]. First group deals with the change of the load.…”

Section: Wireless Charging System Control 71 Wireless Charging System...mentioning

confidence: 99%

Wireless charging systems for electric vehicles

Amjad

Farooq-i-Azam

et al. 2022

Renewable and Sustainable Energy Reviews

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“…Moreover, when the reactive impedance of the coil in the S/P configuration becomes zero and the reactance of the coil is close to zero, resonance occurs [53]. The receiver coil penetrated by a specific amount of magnetic flux represented by coupling coefficient k can be measured by equation 5 [54] as follows:…”

Section: Mathematical Model For S/p Topologymentioning

confidence: 99%

Wireless Power Transfer Based on Spider Web–Coil for Biomedical Implants

Mahmood

Gharghan²,

Mahmood

et al. 2021

IEEE Access

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A biomedical implant (BMI) is a device that allows patients to monitor their health condition at any time and obtain care from any location. However, the functionality of these devices is limited because of their restricted battery capacity, such that a BMI may not attain its full potential. Wireless power transfer technology-based magnetic resonant coupling (WPT-MRC) is considered a promising solution to the problem of restricted battery capacity in BMIs. In this paper, spider web coil-MRC (SWC-MRC) was designed and practically implemented to overcome the restricted battery life in low-power BMIs. A series/parallel (S/P) topology for powering the BMI was proposed in the design of the SWC-MRC. Several experiments were conducted in the lab to investigate the performance of the SWC-MRC system in terms of DC output voltage, power transfer, and transfer efficiency at different resistive loads and distances. The experimental results of the SWC-MRC test revealed that when the Vsource is 30 V, the DC output voltage of 5 V can be obtained at 1 cm. At such a distance (i.e., 1 cm), the SWC-MRC transfer efficiency is 91.86% and 97.91%, and the power transfer is 13.26 W and 23.5 W when 50-and 100-Ω resistive loads were adopted, respectively. A power transfer of 12.42 W and transfer efficiency of 93.38% were achieved at 2 cm for when a 150-Ω resistive load and a Vsource of 35 V were considered. The achieved performance was adequate for charging some BMIs, such as a pacemaker.

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Active Tuning of Wireless Power Transfer System for compensating coil misalignment and variable load conditions

Cited by 17 publications

References 21 publications

Multiband Adaptive Impedance Compensation Methods for Spatially Robust Capacitive Power Transfer Systems

Multiband Adaptive Impedance Compensation Methods for Spatially Robust Capacitive Power Transfer Systems

Wireless charging systems for electric vehicles

Wireless Power Transfer Based on Spider Web–Coil for Biomedical Implants

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