Inductive Power Transfer System With Self-Calibrated Primary Resonant Frequency

Trigui, Aref; Hached, Sami; Mounaïm, Fayçal; Ammari, Ahmed Chiheb; Sawan, Mohamad

doi:10.1109/tpel.2015.2399417

Cited by 68 publications

(28 citation statements)

References 25 publications

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“…is the mutual inductance between levels. From Equations (10) and 11, if the effective mutual coupling between the coils is positive, L can be increased by augmenting the number of turns N. This concept was used to achieve the design parameters required for the two-level inductor, trying to obtain the best quality factor. In the proposed design, the width of the metallic line…”

Section: Rcl Implantable Setmentioning

confidence: 99%

“…However, several systems are characterized by some complex components and result in large area inductors, which are inadequate for implants [1][2][3][4]. For example, Trigui [10] proposes the use of advanced control circuits to compensate for variations in the resonance frequency of the coils. Although this approach is effective in improving PTE, it was very complicated to implement and calibrate.…”

Section: Introductionmentioning

confidence: 99%

“…To decrease the size of the inductors, some alternatives have been proposed, for example, the use of a higher frequency of operation [13], but it is known that high frequencies increase the absorption of energy in biological tissue, causing adverse health problems and a need for a high operating voltage in the transmitter module [2,[10][11][12][13][14][15]. This paper presents a novel approach for the design of an optimized and integrated IMD, combining a low-cost thin-film surface micromachining technique and the use of polymers for flexible electronics.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Fully Integrated Inductive Coupling System: A Discrete Approach Towards Sensing Ventricular Pressure

Hernández-Sebastián

Villa-Villaseñor

Renero-Carrillo

et al. 2020

Sensors

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In this paper, an alternative strategy for the design of a bidirectional inductive power transfer (IPT) module, intended for the continuous monitoring of cardiac pressure, is presented. This new integrated implantable medical device (IMD) was designed including a precise ventricular pressure sensor, where the available implanting room is restricted to a 1.8 × 1.8 cm2 area. This work considers a robust magnetic coupling between an external reading coil and the implantable module: a three-dimensional inductor and a touch mode capacitive pressure sensor (TMCPS) set. In this approach, the coupling modules were modelled as RCL circuits tuned at a 13.56 MHz frequency. The analytical design was validated by means of Comsol Multiphysics, CoventorWare, and ANSYS HFSS software tools. A power transmission efficiency (PTE) of 94% was achieved through a 3.5 cm-thick biological tissue, based on high magnitudes for the inductance (L) and quality factor (Q) components. A specific absorption rate (SAR) of less than 1.6 W/Kg was attained, which suggests that this IPT system can be implemented in a safe way, according to IEEE C95.1 safety guidelines. The set of inductor and capacitor integrated arrays were designed over a very thin polyimide film, where the 3D coil was 18 mm in diameter and approximately 50% reduced in size, considering any conventional counterpart. Finally, this new approach for the IMD was under development using low-cost thin film manufacturing technologies for flexible electronics. Meanwhile, as an alternative test, this novel system was fabricated using a discrete printed circuit board (PCB) approach, where preliminary electromagnetic characterization demonstrates the viability of this bidirectional IPT design.

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Section: Rcl Implantable Setmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a Fully Integrated Inductive Coupling System: A Discrete Approach Towards Sensing Ventricular Pressure

Hernández-Sebastián

Villa-Villaseñor

Renero-Carrillo

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…By inspecting the literature, we can see that many researchers have paid attention to the RIC design in order to improve the PTE. This includes servo loops that can automatically adjust the link parameter variations in order to maintain the resonant state [15], RIC topology modification by using three or four coils may provide a more significant transfer distance [16]. The Q-modulation technique can provide adaptive and efficient inductive power transfer despite the load variations due to the system distance or operation [17].…”

Section: Introductionmentioning

confidence: 99%

A Modified Wireless Power Transfer System for Medical Implants

et al. 2019

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Wireless Power Transfer (WPT) is a promising technique, yet still an experimental solution, to replace batteries in existing implants and overcome the related health complications. However, not all techniques are adequate to meet the safety requirements of medical implants for patients. Ensuring a compromise between a small form factor and a high Power Transfer Efficiency (PTE) for transcutaneous applications still remains a challenge. In this work, we have used a resonant inductive coupling for WPT and a coil geometry optimization approach to address constraints related to maintaining a small form factor and the efficiency of power transfer. Thus, we propose a WPT system for medical implants operating at 13.56 MHz using high-efficiency Complementary Metal Oxide-Semiconductor (CMOS) components and an optimized Printed Circuit Coil (PCC). It is divided into two main circuits, a transmitter circuit located outside the human body and a receiver circuit implanted inside the body. The transmitter circuit was designed with an oscillator, driver and a Class-E power amplifier. Experimental results acquired in the air medium show that the proposed system reaches a power transfer efficiency of 75.1% for 0.5 cm and reaches 5 cm as a maximum transfer distance for 10.67% of the efficiency, all of which holds promise for implementing WPT for medical implants that don’t require further medical intervention, and without taking up a lot of space.

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“…H IGH efficiency and power density being the key features, resonant converters (RCs) have been widely used in electronic ballasts [1]- [2], domestic and industrial induction heating [3]- [4], electric vehicles (EV) [5], wireless power transfer [6]- [7], high frequency alternating current (HFAC) power systems [8], resonant mode power conversion based cycloconverters [9] and power supplies for electrostatic precipitator [10]. RC topologies, capable of providing high voltage transfer ratio (A v ) and galvanic isolation, are used as frontend dc-dc converter in solar photovoltaic (PV) systems [11]- [12] and telecom power supplies [13].…”

Section: Introductionmentioning

confidence: 99%

Gain-Relationship-Based Automatic Resonant Frequency Tracking in Parallel <inline-formula> <tex-math notation="LaTeX">$LLC$</tex-math></inline-formula> Converter

Kundu

Sensarma

2016

IEEE Trans. Ind. Electron.

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This paper proposes a generic control scheme for automatic resonant frequency tracking (ARFT) in resonant converters. The plant is modeled based on realistic ramp variation of resonant frequency due to slowly varying environmental conditions. The proposed ARFT scheme monitors the gain relationship between an exclusive electrical variable-pair to detect frequency drift. An analytical approach is presented to select the most suitable variable-pair for gain comparison. The effects of tank parameter variation and circuit non-idealities on the gain relationship of the chosen variable-pair have been analyzed. An online correction mechanism is proposed to nullify the influence of load variation on the proposed technique. Second order generalized integrator (SOGI) based low cost analog realization of the proposed strategy is detailed. Analytical predictions are experimentally validated by applying the control scheme to a parallel LLC tank based resonant dc-dc converter.Index Terms-Automatic resonant frequency tracking (ARFT), Gain comparator, Second order generalized integrator (SOGI), Parallel LLC tank, Dc-dc converter 0278-0046 (c)

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Inductive Power Transfer System With Self-Calibrated Primary Resonant Frequency

Cited by 68 publications

References 25 publications

Design of a Fully Integrated Inductive Coupling System: A Discrete Approach Towards Sensing Ventricular Pressure

Design of a Fully Integrated Inductive Coupling System: A Discrete Approach Towards Sensing Ventricular Pressure

A Modified Wireless Power Transfer System for Medical Implants

Gain-Relationship-Based Automatic Resonant Frequency Tracking in Parallel <inline-formula> <tex-math notation="LaTeX">$LLC$</tex-math></inline-formula> Converter

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