A Novel Universal Control Scheme for Transcutaneous Energy Transfer (TET) Applications

Friedmann, Jan; Groedl, Felix; Kennel, Ralph

doi:10.1109/jestpe.2014.2345128

Cited by 21 publications

(6 citation statements)

References 20 publications

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“…They can be used for development of the CAD system aimed at biomedical IPU. Also, there is a noticeable interest in a coils positioning method for an IPU performance improvement [22,24]. Precalculated mutual inductance matrices are used in such methods.…”

Section: Resultsmentioning

confidence: 99%

Design and Evaluation of an Inductive Powering Unit for Implantable Medical Devices Using Gpu Computing

Данилов¹,

Mindubaev²,

Selishchev³

2016

PIER B

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Nowadays inductive powering has become a widely spread technique in existing and emerging implanted medical devices (IMD). The geometry of coils couple plays a key role in the design, optimization and evaluation of a biomedical inductive powering unit (IPU). We have proposed a relatively fast method for an execution of these procedures, which is based on a mutual induction calculation using GPU parallel computing. Generally, our approach is to calculate mutual inductance as a function of uncontrolled (axial distance, lateral distance, inclination) and controlled (coils radii, turns numbers, distance between turns) geometric parameters of a coil couple. Calculated geometric functions in its turn are used in the design and optimization procedure to evaluate an IPU performance (e.g., load power). Achieved time gain of the GPU calculations in comparison with the host CPU computing is up to 80 for sequential summation and up to 8 for parallel computing. Also, it is shown that precision of our method is comparable to the precision of existing electromagnetic field solvers, and at the same time, computation time is substantially less (time gain is about 7 . . . 8 for 2D case and about 100 and higher for 3D case). Additionally, we have verified our method experimentally and shown that results of the calculations are accurate enough to predict real IPU performance. Finally, we have given an example of an IPU design optimization using geometric functions calculated with the help of the proposed method.

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Section: Resultsmentioning

confidence: 99%

Design and Evaluation of an Inductive Powering Unit for Implantable Medical Devices Using Gpu Computing

Данилов¹,

Mindubaev²,

Selishchev³

2016

PIER B

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“…For mid-range air gap between transmitting and receiving coil (the distance between two coils is usually less than eight times the diameter of the coil), the power transfer efficiency is vitally important and must be given priority in applications of high-power or continuous-operation electric devices such as power supply for household appliance, vehicle charging and microwave power transmission. Accordingly, the research on WPT technique has been mostly focused on matching impedance and controlling the system to operate at a resonant state to transfer considerable energy at high efficiency [12][13][14][15]. However, under the impedance matching condition for the maximum WPT efficiency, this study found that the power transferred to the load cannot reach the maximum when the WPT system is supplied by an AC voltage source with constant amplitude.…”

Section: Introductionmentioning

confidence: 95%

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

et al. 2017

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Most research on wireless power transfer (WPT) has been focused on how to achieve a high-efficiency power transfer. Our study found that under the impedance matching for achieving maximum WPT efficiency, the power transferred to the load cannot reach the maximum when a WPT system is supplied by an AC voltage source with constant amplitude. However, the load power or the voltage across the load is essential for a low-power electric device such as the implanted medical device where the transfer efficiency is not the priority to be considered. The paper presents a method for achieving maximum power on the load by matching capacitance in a WPT system with given two-coupled-coils. Three sets of matching capacitances for extreme load power were deduced based on the circuit model considering the coil's resistance, and all these three matching make the WPT system operate at the resonant state. Two sets can make the system achieve the global maximum of load power. One set can make the system achieve the local maximum of load power and reach the power transfer efficiency next to 1. Experimental results verified the theoretical calculations. The results can contribute to the compensation design of a practical WPT system for transferring the maximum power to the load.

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“…One reason is the wide variety of applications. It ranges from consumer products like electric tooth brushes and charging of mobile phones to high end medical applications [1][2][3][4][5] like cochlear implants [6], wireless endoscopic capsules [7,8], and cardiac pacemakers [9]. Recently, some effort has been put into the development of contactless charging systems for electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

A Class-E Amplifier for a Loosely Coupled Inductive Power Transfer System with Multiple Receivers

Sutor

Heining

2019

Energies

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We present a method for optimizing the electronic power system for a new type of photobioreactor or photoreactor in general. In the case of photobioreactors, photosynthetic active microorganisms or cells are grown. A novel concept for the illumination of photobioreactors was necessary, as the external illumination of those reactors leads to a limited penetration depth of light. Due to the limited penetration depth, no standard reactors can be use for cultivation, but custom made reactors with very small volume to surface ratio have to be used. This still prevents the technology from a large scale industrial impact. The solution we propose in this paper is an internal illumination via Wireless Light Emitters. This increases the manageable culture volume of photosynthetic active microorganisms or cells. The illumination system is based on floating light emitters, which are powered wirelessly by near field resonant inductive coupling. The floating light emitters are able to illuminate a photobioreactor more homogeneously than external illumination systems do. We designed a class-E amplifier and field coils to produce an intermediate frequency electromagnetic field inside the reactor. An appropriate magnetic flux density was found to be approx. B = 1 mT and the driving frequency is f = 176 kHz. We conducted experiments with a laboratory size photoreactor. The cultivation volume was 30 L containing up to 3000 WLEs. The maximum electric power input was more than 300 W and we calculated an efficiency of up to 76%.

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A Novel Universal Control Scheme for Transcutaneous Energy Transfer (TET) Applications

Cited by 21 publications

References 20 publications

Design and Evaluation of an Inductive Powering Unit for Implantable Medical Devices Using Gpu Computing

Design and Evaluation of an Inductive Powering Unit for Implantable Medical Devices Using Gpu Computing

New Insight of Maximum Transferred Power by Matching Capacitance of a Wireless Power Transfer System

A Class-E Amplifier for a Loosely Coupled Inductive Power Transfer System with Multiple Receivers

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