Space-Frequency Approach to Design of Displacement Tolerant Transcutaneous Energy Transfer System

Данилов, А. А.; Mindubaev, E. A.; Selishchev, and Sergey Vasilyevich

doi:10.2528/pierm15082006

Cited by 7 publications

(3 citation statements)

References 16 publications

(21 reference statements)

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“…High stability is obtained at the cost of the relatively low load power, and for this reason it is feasible solution only for the low-power IMDs (such as cochlear implants). Frequency tuning represents more flexible solution [34]- [37]. It implies adjustment of the IPU operating frequency to the ''odd'' (or seldom to the ''even'') splitting frequency according to the current coils position.…”

Section: Introductionmentioning

confidence: 99%

An Algorithm for the Computer Aided Design of Coil Couple for a Misalignment Tolerant Biomedical Inductive Powering Unit

et al. 2019

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Coils misalignments restrain the wider implementation of inductive powering of implantable medical devices. The misalignment problem can be overcome with the help of the coils geometry optimization. Coil couple design implies simultaneous adjustment of the several parameters (coils radii, turns numbers, and pitch). Thus, it is desirable to have the means for computer-aided design of the system. An algorithm for the coil couple design is devised. The key feature of the algorithm is the use of predefined maximum and minimum acceptable values of the load power as a performance metric. The algorithm gives the geometry of the coil which ensures that the inductive powering unit provides the given range of the load power for the given range of the misalignments. A formal method is proposed for the calculation of the initial coils characteristics and consequent adjustment of the transmitting coil external radius, transmitting coil turns number, coils internal radii (simultaneously), and receiving coil turns number. The software implementing the proposed algorithm was developed. Eight design runs were performed in order to evaluate the algorithm performance in various conditions, including different power ranges (10 W, 100 mW, and 300 µW), operating frequencies (0.2 MHz, 1 MHz, 6.78 MHz, and 13.56 MHz), and possible implementations (ventricular assist devices, cochlear implants, and spinal cord stimulators). It was proved that the power drop as low as 10% of the mean load power can be ensured for the lateral misalignments up to the receiving coil external radius. The low-power inductive powering unit was constructed and tested. The experimental results confirm the numerical modeling. INDEX TERMS Electromagnetic coupling, inductive charging, inductive power transmission, implants.

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Section: Introductionmentioning

confidence: 99%

An Algorithm for the Computer Aided Design of Coil Couple for a Misalignment Tolerant Biomedical Inductive Powering Unit

et al. 2019

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“…It can be argued that inductive link geometry constitutes a key factor in IPU development [26][27][28]. This geometry can be described in terms of controlled and uncontrolled parameters.…”

mentioning

confidence: 99%

“…Moreover, the character of geometry influence may reverse depending on circumstances. In particular, changes in a coils mutual position can lead to underload as well as overload of a system [23,28]. Thus, full information about the interrelation between all geometric parameters and IPU performance metrics is essential to finding new ways for optimization and greatly enhances design procedure potential.…”

mentioning

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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Methods for Compensation of Coil Misalignment in Systems for Inductive Transcutaneous Power Transfer to Implanted Medical Devices

2017

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Space-Frequency Approach to Design of Displacement Tolerant Transcutaneous Energy Transfer System

Cited by 7 publications

References 16 publications

An Algorithm for the Computer Aided Design of Coil Couple for a Misalignment Tolerant Biomedical Inductive Powering Unit

An Algorithm for the Computer Aided Design of Coil Couple for a Misalignment Tolerant Biomedical Inductive Powering Unit

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

Methods for Compensation of Coil Misalignment in Systems for Inductive Transcutaneous Power Transfer to Implanted Medical Devices

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