Inductive-Based Wireless Power Recharging System for  an Innovative Endoscopic Capsule

Tortora, Giuseppe; Mulana, Francesca; Ciuti, Gastone; Dario, P.; Menciassi, Arianna

doi:10.3390/en80910315

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…The vertical view of the circular flat spiral coil and the relative location of two coils are shown in Figure 4. The full expression of the mutual inductance between the two parallel single-turn coils with a loop radius of a and b is shown in Equation 18 [29][30][31], where d and m are the coil-to-coil vertical distance and lateral misalignment, J 0 and J 1 are the Bessel functions of zero and first order respectively, and x is the integral variable and it ranges from zero to infinity:…”

Section: Circular Flat Spiral Coil Modelmentioning

confidence: 99%

Study of the Circular Flat Spiral Coil Structure Effect on Wireless Power Transfer System Performance

2018

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This paper analyses the relationship between the coil design parameters and the system performance, including power transfer efficiency and amount, when circular flat spiral coils are adopted in a wireless power transfer (WPT) system. Coil design variables including outer radius, inner radius, channel width and coil turns are thoroughly studied to improve the system performance with a limited maximum outer radius for practical purposes. A two-coil WPT system has been built to verify the analysis, and the experimental results show good consistency with the theoretical calculations and simulation results, which show that the coil design parameters have a significant impact on the system performance, even with the same coil size. In the experiments, the coil-to-coil distance is 150 mm, the maximum coil outer radius is limited in 300 mm, and the DC input voltage and the load resistance are 100 V and 5 Ω, respectively. When the coils are tightly-wound in the most traditional way to maximize the coil size, the coil-system efficiency is 62.6% with only 4.5 W load power. In contrast, the efficiency optimized coil can improve the coil-system efficiency to 91.2% with the outer radius stayed the same. Besides, when the power transfer efficiency and amount are considered simultaneously, the system can achieve 1279 W load power with 85.94% coil-system efficiency.

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Section: Circular Flat Spiral Coil Modelmentioning

confidence: 99%

Study of the Circular Flat Spiral Coil Structure Effect on Wireless Power Transfer System Performance

2018

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“…Whereas for the TC Coil a planar (pancake) spiral solution (single layer, 10 turns, 20 mm internal diameter, 40 mm external diameter, 1 mm wire diameter and self-inductance of 3.9 μH) was selected. The complete inductive link and overall recharging system have been described in detail in [20].…”

Section: ) Additional Sub-modules: Battery Recharging System and Rfmentioning

confidence: 99%

An Innovative Wireless Endoscopic Capsule With Spherical Shape

Fontana

Mulana

Cavallotti

et al. 2017

IEEE Trans. Biomed. Circuits Syst.

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This paper aims to contribute to the advancement of the Wireless Capsule Endoscopy (WCE) field for ColoRectal Cancer (CRC) screening, by developing all electronic circuits to build an innovative wireless endoscopic capsule with a spherical shape, conceived to reduce the friction during its locomotion and thus improving patient's acceptability. The proposed capsule embeds an image sensor with optics and Light Emitting Diodes (LEDs), a control unit with a telemetry module, an actuation system, a battery with a smart recharging circuit able to recharge in 20 minutes, a smart power-on circuit and a localization module. Everything is devised to fit in a small spherical shape with a diameter of 26 mm and a weight of 12.70 g. The authors present a description of the sub-modules involved in the capsule development, together with the firmware and hardware integration. In order to reduce the bandwidth for matching the specifications of the target commercial telemetry, the firmware interfacing of a custom encoder was performed, which is able to compress the incoming images with a negligible loss of information and occupying a number of Look Up-Tables (LUTs) less than 1780. As a preliminary work, a versatile Field Programmable Gate Arrays (FPGA) based demo-board system has been developed in order to test and optimize the functionalities and the performance of the single sub-modules and wireless vision chain system. This work allows to demonstrate the feasibility of a complex biomedical system, with severe constraints by highlighting the necessity to enhance the frame rate in the future.

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“…This technology based on magnetic resonance coupling can transfer the electric energy or power over a distance without the use of wires. It has been playing an important role in various fields from daily products to medical equipment and aerospace fields [2][3][4][5][6][7][8]. Especially in recent years, the number of electric vehicles has increased rapidly.…”

Section: Introductionmentioning

confidence: 99%

A Witricity-Based High-Power Device for Wireless Charging of Electric Vehicles

et al. 2017

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Abstract:In this paper, a Witricity-based high-power device is proposed for wireless charging of electric vehicles. According to the specific requirements of three-stage charging for electric vehicles, four compensation modes of the Witricity system are analyzed by the Loosely Coupled Theory among transformer coils and the Substitution Theorem in circuit theory. In addition, when combining voltage withstand levels, the current withstand capability, the switching frequency of electronic switching tubes, and the features of the resonant circuit, the series-parallel (SP) compensation mode is selected as the best compensation mode for matching the capacitor of the system. The performances of coils with different ferrite core arrangements are compared by simulations and models. The feasibility of the system is verified theoretically and the system functions are evaluated by the joint simulation of Simplorer and Maxwell. Finally, a Witricity-based high-power device is proposed as designed, and the correctness of theoretical analyses and simulation results are verified.

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Inductive-Based Wireless Power Recharging System for an Innovative Endoscopic Capsule

Cited by 14 publications

References 18 publications

Study of the Circular Flat Spiral Coil Structure Effect on Wireless Power Transfer System Performance

Study of the Circular Flat Spiral Coil Structure Effect on Wireless Power Transfer System Performance

An Innovative Wireless Endoscopic Capsule With Spherical Shape

A Witricity-Based High-Power Device for Wireless Charging of Electric Vehicles

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